A sludge pyrolysis pretreatment system

Abstract

The application discloses a sludge pyrolysis pretreatment system, which comprises a bearing frame, a reaction kettle is rotatably arranged on the bearing frame through a rotating unit, a kettle cover is covered on the top of the reaction kettle through a plurality of fixing pieces, a stirring unit is arranged between the kettle cover and the reaction kettle, a lifting unit matched with the kettle cover is arranged at the top end of the bearing frame, and a filter pressing unit is further arranged on one side of the bearing frame to perform filter pressing treatment on the pretreated sludge material. The application can obtain filtrate and dried sludge cake, so that the moisture contents of the aerobic sludge and the anaerobic sludge after filter pressing are both stably lower than 60%, and the overall sludge reduction is more than 70%. Meanwhile, the sludge treated by the sludge pyrolysis pretreatment system has good harmless effect and high resource utilization rate; and the whole system occupies a small area, adopts high-temperature chemical reaction, and thus has the advantages of short time, small area and high efficiency.

Description

Technical Field

[0001] This application relates to the technical field of sludge treatment, and in particular to a sludge pyrolysis pretreatment system. Background Technology

[0002] The forms of water in sludge are currently very complex, and can be categorized into free water, interstitial water, adsorbed water, and bound water. All adsorbed water, bound water, and a portion of interstitial water are collectively referred to as bound water; this is the portion of water that remains liquid at -20°C and is difficult to remove using mechanical dewatering equipment. In related technologies, standalone mechanical sludge dewatering equipment can dewater residual sludge to a moisture content of 80-85%, but it is difficult to reduce it below 60%. Further sludge treatment methods, such as sanitary landfill and incineration, require the dried sludge to have a moisture content below 60%.

[0003] Therefore, there is an urgent need for a sludge pyrolysis pretreatment system to effectively reduce the moisture content of dried sludge. Utility Model Content

[0004] The purpose of this application is to provide a sludge pyrolysis pretreatment system to address the problem that, in related technologies, standalone mechanical sludge dewatering equipment can dewater residual sludge to a moisture content of 80-85%, but it is difficult to reduce it to below 60%. Furthermore, sludge treatment methods such as sanitary landfill and incineration require the dried sludge to have a moisture content below 60%.

[0005] The sludge pyrolysis pretreatment system provided in this application adopts the following technical solution:

[0006] A sludge pyrolysis pretreatment system includes a support frame, on which a reaction vessel is rotatably mounted via a rotating unit. The top of the reaction vessel is covered with a lid by several fixing components. A stirring unit is provided between the lid and the reaction vessel. A lifting unit that cooperates with the lid is provided at the top of the support frame. A filter press unit is also provided on one side of the support frame to perform filter press treatment on the pretreated sludge material.

[0007] Furthermore, the lifting unit includes support rods symmetrically arranged on both sides of the top of the support frame. Each of the two support rods has a sliding groove on a corresponding side, and a sliding block is slidably arranged in each of the two sliding grooves. A lead screw threadedly connected to the sliding block is rotatably arranged on the inner wall of one of the sliding grooves. A lifting operation handle connected to the lead screw is rotatably arranged on the top of the support rod. A sliding rod slidingly engaged with the sliding block is arranged on the inner wall of the other sliding groove. Handles are symmetrically arranged on the outer side of the lid. The sliding block engages with the handle through a first positioning component.

[0008] Furthermore, the first positioning component includes a positioning seat disposed on one side of the sliding block, a positioning groove that mates with the handle bar on one side of the positioning seat, and a positioning screw hole that communicates with the positioning groove on the positioning seat, and a positioning bolt is internally threaded into the positioning screw hole.

[0009] Furthermore, the rotating unit includes rotating seats symmetrically arranged on both sides of the top of the support frame. Each of the two rotating seats has a rotating groove on its top. A rotating disk is rotatably arranged on both sides of the groove. Rotating rods are symmetrically arranged on both sides of the top of the reactor. Each of the two rotating rods is connected to one of the two rotating disks. A rotating operating handle connected to the rotating disk is provided on one side of one of the rotating seats. A second positioning component is provided between each of the two rotating seats and the two rotating disks.

[0010] Furthermore, the second positioning component includes a positioning pin disposed between the rotating seat and the rotating disk. The rotating seat has a first positioning hole that communicates with the rotating groove. The rotating disk has a plurality of second positioning holes that correspond to the first positioning hole respectively. The first positioning hole and the second positioning hole cooperate with the positioning pin.

[0011] Furthermore, the stirring unit includes a magnetically coupled stirrer disposed on the top of the vessel lid, the output end of the magnetically coupled stirrer is connected to a stirring shaft, one end of the stirring shaft is connected to a stirring blade, the stirring blade extends into the interior of the reactor, and a placement rack is also disposed on one side of the support frame, the placement rack being provided with a controller connected to the magnetically coupled stirrer.

[0012] Furthermore, a cooling water storage tank is provided on one side of the support frame, and a peristaltic pump is installed on the cooling water storage tank via a pipe. A cold water inlet is provided on one side of the magnetically coupled stirrer, and the cold water inlet is connected to the peristaltic pump via a cold water inlet pipe. A cold water outlet is provided on the other side of the magnetically coupled stirrer, and the cold water outlet is connected to the cooling water storage tank via a cold water outlet pipe. A cooling circulation pump is also provided between the cold water outlet pipe and the cooling water storage tank.

[0013] Furthermore, a thermometer sleeve is provided on the vessel lid, the thermometer sleeve extends into the interior of the reactor, and a thermometer is installed inside the thermometer sleeve. A pressure gauge is also provided on one side of the vessel lid.

[0014] Furthermore, the reactor lid is equipped with a feed valve and a sampling valve. The bottom end of the sampling valve is connected to a sampling tube, which extends into the interior of the reactor. An explosion-proof valve and a venting valve are also provided on one side of the reactor lid.

[0015] Furthermore, the filter press unit includes a jack disposed on one side of the support frame, a rotating handle disposed on the jack, a filtrate tray disposed at the bottom of the jack, a filtrate rack disposed at the top of the filtrate tray, and a filter press plate that cooperates with the output end of the jack placed inside the filtrate rack.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] When pyrolysis pretreatment of sludge is required, the fixing parts between the vessel lid and the reactor are first removed to unlock the lid. Then, the lid is raised using a lifting unit, and sludge is added into the reactor. The lid is then lowered using the same lifting unit to close it and lock the fixing parts. The stirring unit is then activated to uniformly stir the sludge inside the reactor, while simultaneously heating the stirred sludge. After the sludge reaction is complete, the lid is raised again using the lifting unit, and the reactor is tilted to a certain degree using a rotating unit to pour the material into filter bags. The filter bags are then effectively pressed using a pressure filter unit to obtain filtrate and dried sludge cake. After this pressure filtration, the moisture content of both aerobic and anaerobic sludge is consistently below 60%, and the overall sludge volume is reduced by more than 70%.

[0018] Meanwhile, the sludge treated by this sludge pyrolysis pretreatment system has a good harmless effect and a high resource utilization rate; moreover, the entire system occupies a small area and adopts a high-temperature chemical reaction, so it has the advantages of short time, small footprint and high efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the sludge pyrolysis pretreatment system according to an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the structure of the filter press unit and filter bag in an embodiment of this application.

[0021] Figure 3 This is a schematic diagram of the stirring unit and the cold water heat exchange mechanism in an embodiment of this application.

[0022] Figure 4 This is a schematic diagram of the structure of the vessel lid, pressure gauge, explosion-proof valve, and venting valve in an embodiment of this application.

[0023] Figure 5 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Support frame; 2. Reactor; 21. Rotating rod; 22. Lifting handle; 3. Reactor lid; 31. Handle rod; 32. Thermometer sleeve; 33. Thermometer; 34. Pressure gauge; 35. Feed valve; 36. Sampling valve; 37. Sampling tube; 38. Explosion-proof valve; 39. Vent valve; 4. Magnetic coupling stirrer; 41. Stirring shaft; 42. Stirring blade; 43. Placement rack; 44. Controller; 45. Cold water inlet; 46. Cold water outlet; 47. Cold water channel; 5. Support rod; 51. Sliding groove; 52. Sliding block; 53. Wire 54. Lifting and lowering operating handle; 55. Slide rod; 56. Positioning seat; 57. Positioning groove; 58. Positioning screw hole; 59. Positioning bolt; 6. Rotating seat; 61. Rotating groove; 62. Rotating disc; 63. Rotating operating handle; 64. Positioning pin; 65. First positioning hole; 66. Second positioning hole; 7. Cooling water storage tank; 71. Peristaltic pump; 72. Cold water inlet pipe; 73. Cold water outlet pipe; 74. Cooling circulation pump; 8. Filter bag; 9. Jack; 91. Rotating handle; 92. Filter tray; 93. Filter rack; 94. Filter press plate. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0027] This application discloses a sludge pyrolysis pretreatment system, referring to... Figure 1 In this embodiment, the sludge pyrolysis pretreatment system includes a support frame 1, a reactor 2, a rotating unit, a reactor cover 3, a fixing component, a stirring unit, a lifting unit, and a filter press unit. The reactor 2 is rotatably mounted on the support frame 1 via the rotating unit, which can tilt the reactor 2 to a certain degree to facilitate the dumping of materials from the reactor 2.

[0028] A cylindrical silicon carbide furnace core is installed outside the reactor body of reactor 2, with a heating resistance wire connected in series within it. The output wire is connected to the controller via a terminal block and cable, resulting in uniform heat conduction and rapid heating. This effectively heats the sludge material inside reactor 2, allowing it to undergo pyrolysis in a high-temperature, oxygen-free environment. Alternatively, the heat transfer oil can be heated by an electric heating element. Specifically, a jacket is welded to the flange outside the reactor body, and an electric heating element is installed inside the jacket. The heat transfer oil inside the jacket is then heated by the electric heating element, achieving the same heating purpose.

[0029] At the same time, refer to Figure 1In this embodiment, the vessel cover 3 is fixedly fitted onto the top of the reactor 2 by several fasteners, and each fastener includes a mating structure of multiple sets of fixing screws and fixing nuts. The fixing screws are fixedly installed on the top of the reactor 2, and the vessel cover 3 has multiple fixing holes that mate with the fixing screws. When the vessel cover 3 is fitted onto the top of the reactor 2, the fixing screws pass through the fixing holes and exit the top of the vessel cover 3.

[0030] Furthermore, these fixing nuts are threadedly connected to these fixing screws, so that the fixing nuts are turned onto the fixing screws, thereby tightly sealing the lid 3 onto the top of the reactor 2. When these fixing nuts are turned off the fixing screws, the lid 3 can be easily lifted from the top of the reactor 2, thus separating the lid 3 from the reactor 2.

[0031] Additionally, refer to Figure 1 and Figure 2 In this embodiment, the stirring unit is located between the lid 3 and the reactor 2 to uniformly stir the high-temperature sludge material in the reactor 2; the lifting unit is located on the top of the support frame 1, and the lifting unit cooperates with the lid 3 to drive the lid 3 to rise and fall, thereby facilitating the addition of sludge material into the reactor 2; the filter press unit is located on one side of the support frame 1. When the reactor 2 is tilted by the rotating unit, the pyrolyzed sludge material is collected by the filter bag 8, and then the filter press unit is used to effectively filter the filter bag 8 to obtain filtrate and dried sludge cake. After filtration, the moisture content of both aerobic and anaerobic sludge is stably below 60%, and the overall sludge volume is reduced by more than 70%.

[0032] The structure of the stirring unit, lifting unit, rotating unit, and filter press unit is described in detail below:

[0033] Specifically, refer to Figure 1 In this embodiment, the stirring unit includes a magnetically coupled stirrer 4, a stirring shaft 41, a stirring blade 42, a mounting frame 43, and a controller 44. The magnetically coupled stirrer 4 is installed at the top center of the vessel lid 3, with its output end penetrating through the vessel lid 3 and pointing downwards towards the interior of the reactor 2. One end of the stirring shaft 41 is fixedly connected to the output end of the magnetically coupled stirrer 4. The stirring blade 42 is fixedly connected to the other end of the stirring shaft 41, and the stirring blade 42 extends into the interior of the reactor 2.

[0034] Meanwhile, the placement rack 43 is installed on one side of the support frame 1; the controller 44 is installed on the placement rack 43, and the controller 44 is also electrically connected to the magnetically coupled stirrer 4, so that the controller 44 can effectively control the start and stop of the magnetically coupled stirrer 4. When the magnetically coupled stirrer 4 is started using the controller 44, the outer magnet on the magnetically coupled stirrer 4 drives the inner magnet to rotate through the magnetic lines of force, and the inner magnet drives the stirring blades 42 on the stirring shaft 41 to rotate, so as to adjust to a suitable speed. Specifically, the stirring speed of the reactor 2 is set to 150 rpm, so as to achieve the purpose of uniformly stirring the sludge in the reactor 2.

[0035] Preferably, in this embodiment, the controller 44 is also electrically connected to the heating device inside the reactor 2 to effectively control the opening and closing of the heating device. When the controller 44 is turned on, it can control the heating device to perform heating work so as to adjust the reactor 2 to a suitable temperature. Specifically, the temperature of the reactor 2 can be raised to 160°C, and the holding time of the reactor 2 can be 30 minutes, so that the sludge material inside the reactor 2 can start to heat up and react.

[0036] More specifically, refer to Figure 1 and Figure 3 In this embodiment, a cooling water storage tank 7 is also installed on one side of the support frame 1. The cooling water storage tank 7 stores cooling water. A peristaltic pump 71 is installed on the cooling water storage tank 7 through a pipe. A cold water pipe inlet 45 is installed on one side of the magnetic coupling stirrer 4. A cold water channel 47 is opened inside the magnetic coupling stirrer 4. The cold water channel 47 is connected to the cold water pipe inlet 45. The cold water pipe inlet 45 is connected to the peristaltic pump 71 through a cold water inlet pipe 72.

[0037] Meanwhile, a cold water outlet 46 is also installed on the other side of the magnetically coupled stirrer 4. One end of the cold water outlet 46 is connected to the cold water channel 47, and the other end of the cold water outlet 46 is connected to the cooling water storage tank 7 through the cold water outlet pipe 73. A cooling circulation pump 74 is also installed between the cold water outlet pipe 73 and the cooling water storage tank 7 to facilitate the circulation of cooling water in the cold water channel 47 into the cooling water storage tank 7.

[0038] By setting up a cold water heat exchange mechanism that coordinates the cooling water storage tank 7, peristaltic pump 71, cold water inlet 45, cold water channel 47, cold water inlet pipe 72, cold water outlet 46, and cold water outlet pipe 73, when the peristaltic pump 71 is started, the cooling water stored in the cooling water storage tank 7 can be discharged into the cold water inlet pipe 72. Then, the cooling water is discharged from the cold water inlet pipe 72 along the cold water inlet 45 into the cold water channel 47 to exchange heat with the magnetically coupled stirrer 4 and prevent the magnetic force from failing. Then, under the action of the cooling circulation pump 74, the cooling water flows back to the cooling water storage tank 7 through the cold water outlet 46 and the cold water outlet pipe 73, thereby recovering the cooling water and achieving the effect of recycling.

[0039] Preferably, in this embodiment, a cold water heat exchange mechanism is also installed on the body of the reactor 2. The cold water heat exchange mechanism on the reactor 2 has the same specific structure as the cold water heat exchange mechanism on the magnetically coupled stirrer 4, and the same effect is achieved. That is, it can effectively exchange heat on the body of the reactor 2 after the reactor 2 has finished working, thereby improving the efficiency of the experiment.

[0040] Additionally, refer to Figure 1 and Figure 4 In this embodiment, a thermometer sleeve 32 is installed on the vessel lid 3, extending into the interior of the reactor 2. A thermometer 33 is installed inside the thermometer sleeve 32, extending from the top of the vessel lid 3 into the thermometer sleeve 32 to measure the temperature inside the reactor 2. The thermometer sleeve 32 effectively protects the thermometer 33. Simultaneously, a pressure gauge 34 is installed on one side of the vessel lid 3. This pressure gauge 34 measures and indicates the pressure inside the reactor 2 to ensure its safe operation.

[0041] Furthermore, in this embodiment, a feed valve 35 and a sampling valve 36 are installed on the vessel lid 3. The bottom end of the sampling valve 36 is also connected to a sampling tube 37, and the end of the sampling tube 37 away from the sampling valve 36 extends into the interior of the reactor 2. In this way, the feed valve 35 can be used to add material into the interior of the reactor 2, and the sampling valve 36 and the sampling tube 37 can be used to remove a small portion of the material inside the reactor 2 for testing purposes.

[0042] Meanwhile, an explosion-proof valve 38 and a vent valve 39 are also installed on one side of the vessel lid 3. The explosion-proof valve 38, acting as a safety valve, controls the pressure of gas or liquid within the reactor 2 during the process, preventing excessive pressure from causing an explosion. Its function is to allow the vent valve 39 to release the gas inside the reactor 2 when the temperature of the reactor 2, as measured by thermometer 33, cools down to below 60 degrees Celsius. This facilitates the raising and lowering of the vessel lid 3, ensuring safe operation.

[0043] Specifically, refer to Figure 1 and Figure 5 In this embodiment, the lifting unit includes a support rod 5, a sliding block 52, a lead screw 53, a lifting operation handle 54, a slide rod 55, a handle bar 31, and a first positioning assembly. Two support rods 5 are provided, symmetrically mounted on the top sides of the support frame 1. A sliding groove 51 is provided on each corresponding side of the two support rods 5, and two sliding blocks 52 are provided, each slidingly engaging with one of the two sliding grooves 51, allowing the two sliding blocks 52 to slide on the two support rods 5 respectively.

[0044] Meanwhile, the two ends of the lead screw 53 are respectively rotatably mounted on the two end walls of one of the sliding grooves 51, and one of the sliding blocks 52 has a threaded hole that is threadedly connected to the lead screw 53; the lifting operation handle 54 is rotatably mounted on the top of the support rod 5, and the lifting operation handle 54 is fixedly connected to the top of the lead screw 53; when the lifting operation handle 54 is rotated, the lead screw 53 can be driven to rotate. Since the lead screw 53 is threadedly connected to the sliding block 52, and the sliding groove 51 slides and limits the sliding block 52, the sliding block 52 can be lifted and moved on one side of the support rod 5.

[0045] In addition, the two ends of the slide rod 55 are fixedly installed on the two end walls of another sliding groove 51, and another sliding block 52 is provided with a sliding hole that slides and engages with the slide rod 55, so that the sliding block 52 slides and moves up and down on the slide rod 55 through the sliding hole; two handle rods 31 are provided, and the two handle rods 31 are symmetrically installed on the outside of the vessel cover 3; the two sliding blocks 52 are respectively engaged with the two handle rods 31 through the first positioning component, so as to realize the handle rod 31 being stably installed on the sliding block 52, so that the two sliding blocks 52 simultaneously drive the vessel cover 3 to move up and down, so as to stably close the vessel cover 3 on the top of the reactor 2, or to lift the vessel cover 3 from the top of the reactor 2.

[0046] More specifically, refer to Figure 1 and Figure 5In this embodiment, the first positioning component includes a positioning seat 56 and a positioning bolt 59. The positioning seat 56 is mounted on the side of the sliding block 52 away from the bearing rod 5, and a positioning groove 57 is formed on the side of the positioning seat 56 away from the sliding block 52. The positioning groove 57 cooperates with the handle rod 31, so that the handle rod 31 is placed in the positioning groove 57, thereby enabling the positioning seat 56 to effectively support the handle rod 31.

[0047] Meanwhile, the positioning seat 56 is also provided with a positioning screw hole 58, which is connected to the positioning groove 57. The positioning bolt 59 is threadedly connected to the positioning screw hole 58, so that the positioning bolt 59 is screwed into the positioning groove 57 along the positioning screw hole 58, thereby effectively stabilizing and limiting the handle bar 31 placed in the positioning groove 57, and thus making the handle bar 31 securely installed in the positioning seat 56.

[0048] Specifically, refer to Figure 1 and Figure 5 In this embodiment, the rotating unit includes a rotating seat 6, a rotating disk 62, a rotating rod 21, a rotating operating handle 63, and a second positioning component. Two rotating seats 6 are provided, symmetrically mounted on the top two sides of the support frame 1. Two rotating disks 62 are also provided, and each of the two rotating seats 6 has a rotating groove 61 on its top side facing away from the support frame 1. The two rotating disks 62 are rotatably mounted within the side walls of the two rotating grooves 61.

[0049] There are two rotating rods 21. One end of each rotating rod 21 is symmetrically installed on the top two sides of the reactor 2. The other end of each rotating rod 21 is installed on one side of each of the two rotating seats 6 through bearings. The two rotating rods 21 are fixedly connected to each other with the two rotating disks 62.

[0050] Meanwhile, the rotary operating handle 63 is mounted on one of the rotating seats 6 on the side away from the reactor 2 via a bearing, and the rotary operating handle 63 is fixedly connected to the rotating disk 62; two second positioning components are provided, and the two second positioning components are respectively located between the two rotating seats 6 and the two rotating disks 62, so as to securely limit the rotating disk 62 inside the rotating seat 6, thereby facilitating the effective adjustment of the tilt angle of the reactor 2.

[0051] When the rotary operating handle 63 is turned, the rotating disk 62 is driven to rotate. The rotating disk 62 then drives the reactor 2 to rotate via the rotating rod 21. When the reactor 2 is tilted to a certain degree, the second positioning component is used to lock and limit the rotating disk 62, so that the tilted reactor 2 is stably positioned, making it easier to remove the material from the reactor 2.

[0052] Preferably, in this embodiment, a lifting handle 22 is provided on both sides of the bottom of the reactor 2. The lifting handle 22 can lift the bottom of the reactor 2 upwards. At the same time, in conjunction with the rotation of the rotating operating handle 63, it not only makes it easier to tilt the reactor 2 to a specified angle so as to tilt and remove the material inside the reactor 2, but also effectively saves effort.

[0053] More specifically, refer to Figure 1 and Figure 5 In this embodiment, the second positioning component includes a positioning pin 64 disposed between the rotating seat 6 and the rotating disk 62. A first positioning hole 65 is provided on the rotating seat 6, which communicates with the rotating groove 61. A plurality of second positioning holes 66 are provided on the rotating disk 62, which correspond to the first positioning holes 65 respectively. The positioning pin 64 cooperates with both the first positioning hole 65 and the second positioning hole 66, so that the positioning pin 64 passes through the rotating seat 6 and the rotating disk 62 in sequence along the first positioning hole 65 and the second positioning hole 66, thereby securing the rotating disk 62 firmly in the rotating groove 61 of the rotating seat 6.

[0054] To elaborate, in this embodiment, the bottom end of the support rod 5 has a U-shaped structure. The two sides of the bottom end of the support rod 5 are installed on the top of the support frame 1, and the concave part in the middle of the bottom end of the support rod 5 is sleeved on the top of the rotating seat 6 with a certain space. This space not only facilitates the rotation of the rotating disk 62, but also makes it easy to see the correspondence between the first positioning hole 65 and the second positioning hole 66, thereby realizing the positioning of the rotating disk 62 by using the positioning pin 64.

[0055] Specifically, refer to Figure 1 and Figure 2 In this embodiment, the filter press unit includes a jack 9, a rotary handle 91, a filtrate tray 92, a filtrate rack 93, and a filter press plate 94. The jack 9 is located on one side of the support frame 1; the rotary handle 91 is mounted on the jack 9 to control its output; the filtrate tray 92 is mounted at the bottom of the jack 9; and the filtrate rack 93 is mounted on top of the filtrate tray 92. The pyrolyzed material poured from the reactor 2 is transferred to the filter bag 8 for collection, and the collected filter bag 8 is then placed inside the filtrate rack 93.

[0056] Meanwhile, the filter press plate 94 is slidably placed inside the filtrate rack 93 to cover the top of the filter bag 8, and the filter press plate 94 cooperates with the output end of the jack 9; when the rotating handle 91 is turned, the output end of the jack 9 moves downward to press the filter press plate 94 against it, so that the filter press plate 94 squeezes the filter bag 8 inside the filtrate rack 93, thereby obtaining filtrate and dried mud cake.

[0057] The sludge obtained through pyrolysis drying has the following advantages:

[0058] (1) Good sludge harmlessness effect: Nitrogen and sulfur compounds can be converted into small molecule oxides after pyrolysis, which can be eliminated through simple harmless treatment processes; (2) Small footprint: High-temperature chemical reaction is used, which is short in time, small in footprint, and highly efficient; (3) High resource utilization rate: The solid products of sludge pyrolysis are materials with a large number of pores and high specific surface area, which have good adsorption performance and can be used to prepare water treatment adsorbents, soil conditioners and other products. After purification, the products can be used as an excellent fuel with certain economic value.

[0059] The implementation principle of a sludge pyrolysis pretreatment system according to an embodiment of this application is as follows:

[0060] When sludge needs to be pretreated by pyrolysis, first use a wrench to loosen the fixing nut between the lid 3 and the reactor 2 to unlock the lid 3. Then, use the lifting unit to drive the lid 3 to rise and add 3 kg of sludge material into the reactor 2. Then, use the lifting unit to drive the lid 3 to fall to close the lid 3 and lock the fixing nut. Then, start the stirring unit to uniformly stir the sludge in the reactor 2. At the same time, the reactor 2 also heats the sludge being stirred.

[0061] After the sludge reaction is complete, the lifting unit drives the lid 3 to rise, and then the rotating unit tilts the reactor body 2 to a certain degree to pour the material into the filter bag 8. The filter bag 8 is then effectively filtered by the pressure filter unit to obtain the filtrate and the dried sludge cake. After the pressure filter, the moisture content of both aerobic and anaerobic sludge is consistently below 60%, and the overall sludge volume is reduced by more than 70%.

[0062] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sludge pyrolysis pretreatment system, characterized in that: The system includes a support frame (1), on which a reaction vessel (2) is rotatably mounted via a rotating unit. The top of the reaction vessel (2) is covered with a lid (3) by several fixing components. A stirring unit is provided between the lid (3) and the reaction vessel (2). A lifting unit that cooperates with the lid (3) is provided at the top of the support frame (1). A filter press unit is also provided on one side of the support frame (1) to filter the pretreated sludge material.

2. The sludge pyrolysis pretreatment system according to claim 1, characterized in that: The lifting unit includes support rods (5) symmetrically arranged on both sides of the top of the support frame (1). Each of the two support rods (5) has a sliding groove (51) on one side. Each of the two sliding grooves (51) has a sliding block (52) slidably arranged in it. The inner wall of one of the sliding grooves (51) is rotatably provided with a screw (53) threadedly connected to the sliding block (52). The top of the support rod (5) is rotatably provided with a lifting operation handle (54) connected to the screw (53). The inner wall of the other sliding groove (51) is provided with a sliding rod (55) that slidably engages with the sliding block (52). The outer side of the lid (3) is symmetrically provided with a handle (31). The sliding block (52) engages with the handle (31) through a first positioning component.

3. The sludge pyrolysis pretreatment system according to claim 2, characterized in that: The first positioning component includes a positioning seat (56) disposed on one side of the sliding block (52). A positioning groove (57) that cooperates with the handle (31) is provided on one side of the positioning seat (56). A positioning screw hole (58) that communicates with the positioning groove (57) is also provided on the positioning seat (56). A positioning bolt (59) is threaded into the positioning screw hole (58).

4. The sludge pyrolysis pretreatment system according to claim 1, characterized in that: The rotating unit includes rotating seats (6) symmetrically arranged on both sides of the top of the support frame (1). The top of each of the two rotating seats (6) is provided with a rotating groove (61). Rotating discs (62) are rotatably arranged on both sides of the groove walls of the two rotating grooves (61). Rotating rods (21) are symmetrically arranged on both sides of the top of the reactor (2). The two rotating rods (21) are respectively connected to the two rotating discs (62). A rotating operating handle (63) connected to the rotating disc (62) is provided on one side of one of the rotating seats (6). A second positioning component is provided between each of the two rotating seats (6) and the two rotating discs (62).

5. The sludge pyrolysis pretreatment system according to claim 4, characterized in that: The second positioning component includes a positioning pin (64) disposed between the rotating seat (6) and the rotating disk (62). The rotating seat (6) has a first positioning hole (65) communicating with the rotating groove (61). The rotating disk (62) has a plurality of second positioning holes (66) respectively corresponding to the first positioning hole (65). The first positioning hole (65) and the second positioning hole (66) cooperate with the positioning pin (64).

6. The sludge pyrolysis pretreatment system according to claim 1, characterized in that: The stirring unit includes a magnetically coupled stirrer (4) disposed on the top of the vessel lid (3). The output end of the magnetically coupled stirrer (4) is connected to a stirring shaft (41). One end of the stirring shaft (41) is connected to a stirring blade (42). The stirring blade (42) extends out of the interior of the reactor (2). A placement rack (43) is also disposed on one side of the support frame (1). A controller (44) connected to the magnetically coupled stirrer (4) is disposed on the placement rack (43).

7. The sludge pyrolysis pretreatment system according to claim 6, characterized in that: A cooling water storage tank (7) is provided on one side of the support frame (1). A peristaltic pump (71) is installed on the cooling water storage tank (7) through a pipe. A cold water inlet (45) is provided on one side of the magnetic coupling stirrer (4). The cold water inlet (45) is connected to the peristaltic pump (71) through a cold water inlet pipe (72). A cold water outlet (46) is provided on the other side of the magnetic coupling stirrer (4). The cold water outlet (46) is connected to the cooling water storage tank (7) through a cold water outlet pipe (73). A cooling circulation pump (74) is also provided between the cold water outlet pipe (73) and the cooling water storage tank (7).

8. The sludge pyrolysis pretreatment system according to claim 1, characterized in that: A thermometer sleeve (32) is provided on the lid (3), the thermometer sleeve (32) extends into the interior of the reactor (2), a thermometer (33) is provided inside the thermometer sleeve (32), and a pressure gauge (34) is also provided on one side of the lid (3).

9. The sludge pyrolysis pretreatment system according to claim 1, characterized in that: The reactor lid (3) is provided with a feed valve (35) and a sampling valve (36). The bottom end of the sampling valve (36) is connected to a sampling tube (37). The sampling tube (37) extends out of the interior of the reactor (2). An explosion-proof valve (38) and a venting valve (39) are also provided on one side of the reactor lid (3).

10. A sludge pyrolysis pretreatment system according to claim 1, characterized in that: The filter press unit includes a jack (9) disposed on one side of the support frame (1), a rotating handle (91) disposed on the jack (9), a filtrate tray (92) disposed at the bottom of the jack (9), a filtrate rack (93) disposed at the top of the filtrate tray (92), and a filter press plate (94) that cooperates with the output end of the jack (9) placed inside the filtrate rack (93).

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