Sludge dewatering and drying all-in-one machine

Abstract

The application relates to the field of environmental protection sewage treatment technology, in particular to a sludge dewatering and drying integrated machine, which comprises a bearing rack, a sludge crushing and dispersing mechanism is arranged at the top of the bearing rack, a central control system is arranged at one side of the bearing rack, a spiral press dewatering mechanism is arranged at the bottom of the sludge crushing and dispersing mechanism, a filter belt press dewatering mechanism is arranged at the bottom of the spiral press dewatering mechanism, a stirring and drying cylinder is arranged at the bottom of the filter belt press dewatering mechanism, and a cooling and conveying mechanism is arranged at one side of the stirring and drying cylinder. Therefore, the device can realize deep dewatering of sludge through the synergistic effect of secondary pressing and filtrate recovery, improve dewatering purity, reduce pollution, and provide the effect of uniformly dispersing sludge for the subsequent drying process.

Description

Technical Field

[0001] This application relates to the field of environmental wastewater treatment technology, and in particular to an integrated sludge dewatering and drying machine. Background Technology

[0002] The current sludge treatment field faces prominent problems such as high moisture content, high treatment difficulty, and stringent environmental protection requirements. Existing sludge dewatering equipment generally suffers from defects such as single function, low treatment efficiency, and insufficient automation. Traditional sludge treatment often uses single screw press or belt filter press. Single screw press equipment has limited precision in the fit between the pressing chamber and the screw shaft, resulting in incomplete sludge dewatering and difficulty in reducing the moisture content to the requirements of subsequent drying processes. Single belt filter press equipment is prone to sludge clumping, uneven feeding, and lacks effective overflow prevention and filtrate recovery structures, leading to sludge loss and secondary pollution.

[0003] A search revealed Chinese Patent Publication No. CN201810546147.9, which discloses an integrated sludge dewatering and drying machine, belonging to the field of environmentally friendly wastewater treatment technology. Its features include: a dewatering device, a wastewater collection tank, a flocculation device, a heat-generating fan, a heating furnace, a spiral sludge drying device or a belt sludge drying device, a hot air duct, a heat-conducting pipe, an auxiliary heating and waste heat recovery system, and a condensation system. The dewatered sludge undergoes drying treatment, resulting in low moisture content. At low temperatures, the auxiliary heating and waste heat recovery system heats the dewatering and flocculation devices, improving the dewatering and flocculation effects. The integrated dewatering and drying system has a small footprint, making it suitable for the technological upgrading of existing wastewater treatment plants with limited space.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: the equipment uses only a single dewatering structure, resulting in insufficient sludge dewatering depth and difficulty in quickly removing interstitial water and some bound water, leading to high subsequent drying load and energy consumption; the belt dewatering components lack an effective anti-overflow design, causing sludge to easily leak from both sides of the filter belt during the pressing process, which not only wastes materials but also increases the difficulty of equipment cleaning and subsequent filtrate treatment; the dewatered sludge often clumps together, resulting in uneven heating after directly entering the drying stage, affecting drying efficiency and final treatment quality. Utility Model Content

[0005] To address the problems mentioned in the background section, this application provides an integrated sludge dewatering and drying machine.

[0006] This application provides an integrated sludge dewatering and drying machine, which adopts the following technical solution: An integrated sludge dewatering and drying machine includes a support frame, a sludge crushing and dispersing mechanism is provided at the top of the support frame, a central control system is provided on one side of the support frame, a screw press dewatering mechanism is provided at the bottom of the sludge crushing and dispersing mechanism, a filter belt press dewatering mechanism is provided at the bottom of the screw press dewatering mechanism, a stirring drying cylinder is provided at the bottom of the filter belt press dewatering mechanism, and a cooling conveying mechanism is provided on one side of the stirring drying cylinder;

[0007] The spiral pressing dewatering mechanism includes a drive motor fixedly installed on one side of the support frame. The drive motor includes a bevel gear assembly for driving the spiral pressing cylinder to rotate. The spiral pressing cylinder includes a pressing chamber for pressing sludge and a conical spiral shaft. The conical spiral shaft is fixedly installed on one side of the output end of the bevel gear assembly. The pressing chamber is movably sleeved on the outside of the conical spiral shaft. The conical spiral shaft cooperates with the pressing chamber to squeeze the sludge, and the pressing pressure is increased by the change of the taper to separate the water.

[0008] The filter belt pressing and dewatering mechanism includes a first belt drive assembly disposed on one side of the output end of the drive motor. A gear drive assembly is disposed on one side of the first belt drive assembly, and a second belt drive assembly is disposed at the bottom of the gear drive assembly. The gear drive assembly and the second belt drive assembly drive the upper filter pressing assembly and the lower filter pressing assembly to rotate, respectively. The upper filter pressing assembly includes a first pressing roller and a second pressing roller for driving the upper polyester filter belt to rotate. The second pressing roller is movably sleeved on one side of the belt of the gear drive assembly. The lower filter pressing assembly includes a lower polyester filter belt movably connected to the bottom of the upper polyester filter belt, and a third pressing roller, a fourth pressing roller, and a drive roller movably sleeved inside the lower polyester filter belt for driving the lower polyester filter belt to rotate. The drive roller is movably sleeved on one side of the belt of the second belt drive assembly. The first pressing roller and the fourth pressing roller are staggered.

[0009] Optionally, the thinner end of the conical spiral shaft is close to the bevel gear assembly of the drive motor, and the thicker end of the conical spiral shaft is close to the discharge port, for pressing sludge.

[0010] Optionally, the screw press dewatering mechanism further includes a discharge port located directly above the filter belt press dewatering mechanism, a spring connecting rod, and a fixed bracket. The discharge port is movably sleeved on one side of the output end of the conical screw shaft, and a spring connecting rod is fixedly installed on the other side of the discharge port. A fixed bracket is fixedly installed around the spring connecting rod.

[0011] Optionally, the filter belt pressing and dewatering mechanism further includes overflow prevention plates fixedly installed on both sides of the lower polyester filter belt. The overflow prevention plates are arranged between the upper and lower polyester filter belts to achieve the purpose of preventing sludge overflow.

[0012] Optionally, the filter belt pressing and dehydration mechanism also includes a filtrate collection tank welded to the bottom of the anti-overflow plate to achieve the purpose of collecting filtrate for centralized treatment.

[0013] Optionally, the filter belt pressing and dewatering mechanism further includes a dispersing toothed disc fixedly installed on one side of the filtrate collection tank. The dispersing toothed disc is located directly below the filter belt pressing and dewatering mechanism. The dispersing toothed disc further disperses the sludge after the filter belt is pressed, making it easier to enter the drying stage.

[0014] Optionally, the upper and lower polyester filter belts of the filter belt pressing and dewatering mechanism are provided with protrusions.

[0015] In summary, this application includes the following beneficial technical effects:

[0016] 1. This utility model, by setting up components such as a drive motor, bevel gear assembly, conical spiral shaft, pressing chamber, discharge port, spring connecting rod, and fixed bracket, achieves the effect of using the drive motor, bevel gear assembly, and conical spiral shaft to gradually squeeze sludge through a gradual structure from a thinner end to a thicker end. The sleeved fit between the pressing chamber and the conical spiral shaft ensures pressing stability, and the spring connecting rod and fixed bracket fix the discharge port to ensure smooth discharge. Thus, this device can perform preliminary and efficient dewatering of crushed sludge through spiral pressing, reducing the sludge moisture content and laying a good foundation for subsequent filter belt pressing processes.

[0017] 2. This utility model, by setting up a first belt transmission assembly, a gear transmission assembly, a second belt transmission assembly, upper and lower polyester filter belts, multiple sets of press rollers, an overflow plate, a filtrate collection tank, and a dispersing toothed disc, etc., through the cooperation between the transmission assembly, the press rollers, and the filter belts, enables the upper and lower polyester filter belts to perform secondary pressing on the initially dewatered sludge through the convex structure and the staggered press rollers. The overflow plate prevents sludge overflow, the filtrate collection tank centrally treats the filtrate, and the dispersing toothed disc disperses the dewatered sludge. Thus, this device can achieve deep dewatering of sludge through the synergistic effect of secondary pressing and filtrate recovery, improve dewatering purity, reduce pollution, and provide uniformly dispersed sludge for subsequent drying processes. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;

[0019] Figure 2 This is a partial structural diagram of an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the main structure of the spiral pressing dehydration mechanism in the embodiments of this application;

[0021] Figure 4This is a partial structural diagram of the spiral pressing dehydration mechanism in an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the main structure of the filter belt pressing and dehydration mechanism in the embodiments of this application;

[0023] Figure 6 This is a schematic diagram of the stirring and drying cylinder in an embodiment of this application;

[0024] Figure 7 This is a schematic diagram of the cooling conveying mechanism in an embodiment of this application;

[0025] Figure 8 This is a schematic diagram of the central control system in an embodiment of this application;

[0026] Reference numerals: 1. Support frame; 2. Sludge crushing and dispersing mechanism; 3. Screw press dewatering mechanism; 301. Drive motor; 302. Pressing chamber; 303. Conical screw shaft; 304. Discharge port; 305. Spring connecting rod; 306. Fixed bracket; 4. Filter belt press dewatering mechanism; 401. First belt drive assembly; 402. Gear drive assembly; 403. Second belt drive assembly; 404. Upper polyester filter belt; 405. First press roller; 406. Second press roller; 407. Lower polyester filter belt; 408. Third press roller; 409. Fourth press roller; 410. Drive roller; 411. Overflow plate; 412. Filtrate collection tank; 413. Dispersing toothed disc; 5. Stirring and drying cylinder; 6. Cooling and conveying mechanism; 7. Central control system. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0028] This application discloses an integrated sludge dewatering and drying machine.

[0029] like Figures 1 to 8 As shown, an integrated sludge dewatering and drying machine includes a support frame 1. A sludge crushing and dispersing mechanism 2 is installed at the top of the support frame 1. A central control system 7 is installed on one side of the support frame 1. A screw press dewatering mechanism 3 is installed at the bottom of the sludge crushing and dispersing mechanism 2. A filter belt press dewatering mechanism 4 is installed at the bottom of the screw press dewatering mechanism 3. A mixing and drying cylinder 5 is installed at the bottom of the filter belt press dewatering mechanism 4. A cooling and conveying mechanism 6 is installed on one side of the mixing and drying cylinder 5. This integrated layout enables continuous operation of the entire sludge "crushing-dewatering-drying-conveying" process, reducing intermediate transfer links. The central control system 7 can adjust the operating parameters of each mechanism in real time to ensure processing efficiency and sludge dryness meet standards, adapting to the processing needs of sludge with different moisture contents.

[0030] Please see Figure 3The screw press dewatering mechanism 3 includes a drive motor 301 fixedly installed on one side of the support frame 1. The drive motor 301 includes a bevel gear assembly for driving the screw press cylinder to rotate. The screw press cylinder includes a pressing chamber 302 for pressing sludge and a conical screw shaft 303. The conical screw shaft 303 is fixedly installed on one side of the output end of the bevel gear assembly. The pressing chamber 302 is movably sleeved outside the conical screw shaft 303. The thinner end of the conical screw shaft 303 is close to the bevel gear assembly of the drive motor 301, and the thicker end of the conical screw shaft 303 is close to the discharge port 304, for pressing sludge. The gradually changing design of the conical screw shaft 303 creates gradient pressure. The sludge is gradually squeezed as the screw advances, and water seeps out from the gaps in the pressing chamber 302. The bevel gear assembly has high transmission efficiency and low noise, ensuring a stable and continuous pressing process and significantly improving the solid-liquid separation effect of the initial dewatering.

[0031] Please see Figure 4 The screw press dewatering mechanism 3 also includes a discharge port 304 located directly above the filter belt press dewatering mechanism 4, a spring connecting rod 305, and a fixed bracket 306. The discharge port 304 is movably sleeved on one side of the output end of the conical screw shaft 303, and the spring connecting rod 305 is fixedly installed on the other side of the discharge port 304. The fixed bracket 306 is fixedly installed around the spring connecting rod 305. The spring connecting rod 305 can buffer the vibration during pressing and prevent the discharge port 304 from shifting. The fixed bracket 306 strengthens the overall structural rigidity, ensures that the discharge port 304 is accurately connected to the filter belt press dewatering mechanism 4, prevents sludge from spilling, and ensures the sealing and smoothness of the process connection.

[0032] Please see Figure 5The filter belt pressing and dewatering mechanism 4 includes a first belt drive assembly 401 disposed on one side of the output end of the drive motor 301. A gear drive assembly 402 is disposed on one side of the first belt drive assembly 401, and a second belt drive assembly 403 is disposed at the bottom of the gear drive assembly 402. The gear drive assembly 402 and the second belt drive assembly 403 respectively drive the upper filter press assembly and the lower filter press assembly to rotate. The upper filter press assembly includes a first press roller 405 and a second press roller 406 for driving the upper polyester filter belt 404 to rotate. 06. The second press roller 406 is movably sleeved on one side of the belt of the gear transmission assembly 402; the lower filter assembly includes a lower polyester filter belt 407 movably connected to the bottom of the upper polyester filter belt 404, and a third press roller 408, a fourth press roller 409, and a drive roller 410 movably sleeved inside the lower polyester filter belt 407 for driving the rotation of the lower polyester filter belt 407. The drive roller 410 is movably sleeved on one side of the belt of the second belt transmission assembly 403. The first press roller 405 and the fourth press roller 409 are staggered. Multiple sets of transmission assemblies work together to achieve synchronous operation of the upper and lower filter belts. The staggered press rollers increase the pressure area of ​​the sludge. The polyester filter belt is wear-resistant and corrosion-resistant, and the surface protrusions enhance the extrusion friction, further dewatering the sludge after screw pressing, significantly reducing the sludge moisture content to meet the requirements of subsequent drying processes.

[0033] Please see Figure 5 The filter belt pressing and dewatering mechanism 4 also includes overflow prevention plates 411 fixedly installed on both sides of the lower polyester filter belt 407. The overflow prevention plates 411 are set between the upper polyester filter belt 404 and the lower polyester filter belt 407 to achieve the purpose of preventing sludge overflow. The filter belt pressing and dewatering mechanism 4 also includes a filtrate collection tank 412 welded to the bottom of the overflow prevention plate 411 to achieve the purpose of collecting filtrate for centralized treatment. The filter belt pressing and dewatering mechanism 4 also includes a dispersing toothed disc 413 fixedly installed on one side of the filtrate collection tank 412. The dispersing toothed disc 413 is located directly below the filter belt pressing and dewatering mechanism 4. The surfaces of the upper polyester filter belt 404 and the lower polyester filter belt 407 of the filter belt pressing and dewatering mechanism 4 are provided with protrusions. The overflow plate 411 prevents sludge from leaking and contaminating the equipment, the filtrate collection tank 412 enables centralized recycling and treatment of wastewater to avoid secondary pollution, the dispersing toothed disc 413 breaks up the compacted sludge to facilitate its entry into the mixing and drying cylinder 5 for rapid drying, and the protrusions on the filter belt reduce sludge adhesion and lower the difficulty of cleaning the filter belt.

[0034] Example

[0035] Sludge dewatering and drying scenario at municipal wastewater treatment plant

[0036] First, start-up preparation: The operator starts the equipment through the central control system 7 on one side of the support frame 1, sets parameters such as screw pressing pressure, filter belt drive speed, temperature of stirring drying cylinder 5 and conveying rate of cooling conveying mechanism 6, and completes equipment preheating and self-check.

[0037] Secondly, sludge feeding: The high-moisture sludge produced after municipal sewage treatment is introduced into the sludge crushing and dispersing mechanism 2 at the top of the bearing frame 1 through the conveying pipeline. This mechanism crushes and disperses the clumped sludge to avoid clogging subsequent treatment units.

[0038] Next, the first-stage screw press dewatering: the crushed sludge naturally falls into the screw press dewatering mechanism 3. The central control system 7 starts the drive motor 301, which drives the conical screw shaft 303 to rotate at high speed in the pressing chamber 302 through the bevel gear assembly. Since the thinner end of the conical screw shaft 303 is close to the bevel gear assembly and the thicker end is close to the discharge port 304, the sludge is gradually squeezed as the screw propels it in the pressing chamber 302. Free water is discharged through the filter gaps of the pressing chamber 302, and the initially dewatered sludge falls from the discharge port 304 into the filter belt press dewatering mechanism 4 below. During this process, the spring connecting rod 305 buffers the pressure impact of the pressing chamber 302 through the fixed bracket 306 to ensure stable operation of the equipment.

[0039] Next, the sludge undergoes secondary belt pressing and dewatering: The sludge falls between the upper polyester filter belt 404 and the lower polyester filter belt 407 of the belt pressing and dewatering mechanism 4. The drive motor 301 drives the gear transmission assembly 402 via the first belt transmission assembly 401. The gear transmission assembly 402 drives the first pressing roller 405 and the second pressing roller 406 of the upper filter press assembly to rotate, thereby moving the upper polyester filter belt 404. Simultaneously, the gear transmission assembly 402 is linked to the second belt transmission assembly 403, which drives the drive roller 410 to rotate, causing the lower polyester filter belt 407 to move synchronously in opposite directions to the upper polyester filter belt 404. Because the first pressing roller 405 and the fourth pressing roller 409 are staggered, and the surfaces of the upper polyester filter belt 404 and the lower polyester filter belt 407 are provided with protrusions, the sludge undergoes further removal of interstitial water under the combined pressure and friction of the protrusions. The overflow baffles 411 on both sides prevent sludge from overflowing, and the removed filtrate flows into the filtrate collection tank 412 welded at the bottom for centralized discharge and treatment.

[0040] Finally, drying and cooling conveying: After secondary pressing, the sludge cake is broken up by the dispersing toothed disc 413 below the filter belt press dewatering mechanism 4 and falls into the stirring drying cylinder 5. Residual moisture is removed by stirring and at a set temperature to achieve the drying standard. The dried sludge particles enter the cooling conveying mechanism 6, are cooled to room temperature, and then transported to the designated storage area, completing the entire processing flow.

[0041] The implementation principle of the sludge dewatering and drying integrated machine in this application embodiment is as follows:

[0042] First, the sludge is crushed and dispersed by the sludge crushing and dispersing mechanism 2 at the top of the support frame 1, breaking down the clumped sludge into a loose state, eliminating the impact of sludge agglomeration on subsequent dewatering, providing uniform raw materials for subsequent dewatering processes, and ensuring the smooth operation of subsequent dewatering steps.

[0043] Secondly, the crushed sludge enters the screw press dewatering mechanism 3. The drive motor 301 drives the conical screw shaft 303 to rotate through the bevel gear assembly. The gradual structure of the conical screw shaft 303 from the thin end to the coarse end, together with the pressing chamber 302, gradually squeezes the sludge to initially separate the water in the sludge. The discharge port 304, which is fixed by the spring connecting rod 305 and the fixed bracket 306, smoothly transports the initially dewatered sludge to the next process.

[0044] Next, the initially dewatered sludge falls between the upper polyester filter belt 404 and the lower polyester filter belt 407 of the filter belt pressing and dewatering mechanism 4. The first belt drive assembly 401, the second belt drive assembly 403 and the gear drive assembly 402 cooperate to drive the first pressing roller 405, the second pressing roller 406, the third pressing roller 408, the fourth pressing roller 409 and the drive roller 410 to drive the filter belt to rotate. The staggered pressing rollers and the protrusions on the surface of the filter belt work together to perform a second deep pressing on the sludge and further separate the water.

[0045] Next, during the filter belt pressing process, the overflow plate 411 prevents sludge from overflowing, the filtrate collection tank 412 collects the filtrate produced by pressing in a concentrated manner, which is convenient for subsequent centralized treatment, and the dispersing toothed disc 413 breaks up the sludge after secondary dewatering to form uniformly dispersed sludge particles, avoiding clumping that would affect the subsequent drying effect.

[0046] Finally, the dispersed sludge enters the mixing and drying drum 5 for drying to remove residual moisture. The dried sludge is then cooled by the cooling and conveying mechanism 6 and transported to a designated location. The entire process is controlled by the central control system 7 to achieve automated and continuous operation of sludge dewatering and drying.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sludge dewatering and drying integrated machine, comprising a support frame (1), characterized in that: The top of the support frame (1) is provided with a sludge crushing and dispersing mechanism (2), the side of the support frame (1) is provided with a central control system (7), the bottom of the sludge crushing and dispersing mechanism (2) is provided with a screw pressing and dewatering mechanism (3), the bottom of the screw pressing and dewatering mechanism (3) is provided with a filter belt pressing and dewatering mechanism (4), the bottom of the filter belt pressing and dewatering mechanism (4) is provided with a stirring and drying cylinder (5), and the side of the stirring and drying cylinder (5) is provided with a cooling and conveying mechanism (6). The spiral pressing dewatering mechanism (3) includes a drive motor (301) fixedly installed on one side of the support frame (1). The drive motor (301) includes a bevel gear assembly for driving the spiral pressing cylinder to rotate. The spiral pressing cylinder includes a pressing chamber (302) for pressing sludge and a conical spiral shaft (303). The conical spiral shaft (303) is fixedly installed on one side of the output end of the bevel gear assembly, and the pressing chamber (302) is movably sleeved on the outside of the conical spiral shaft (303). The filter belt pressing and dewatering mechanism (4) includes a first belt drive assembly (401) disposed on one side of the output end of the drive motor (301). A gear drive assembly (402) is disposed on one side of the first belt drive assembly (401), and a second belt drive assembly (403) is disposed at the bottom of the gear drive assembly (402). The gear drive assembly (402) and the second belt drive assembly (403) drive the upper filter press assembly and the lower filter press assembly to rotate, respectively. The upper filter press assembly includes a first press roller (405) and a second press roller (406) for driving the upper polyester filter belt (404) to rotate. The second press roller (406) is movably sleeved on one side of the belt of the gear transmission assembly (402); the lower filter assembly includes a lower polyester filter belt (407) movably connected to the bottom of the upper polyester filter belt (404), and a third press roller (408), a fourth press roller (409) and a drive roller (410) movably sleeved inside the lower polyester filter belt (407) for driving the lower polyester filter belt (407) to rotate. The drive roller (410) is movably sleeved on one side of the belt of the second belt transmission assembly (403), and the first press roller (405) and the fourth press roller (409) are staggered.

2. The sludge dewatering and drying integrated machine according to claim 1, characterized in that: The thinner end of the conical spiral shaft (303) is close to the bevel gear assembly of the drive motor (301), and the thicker end of the conical spiral shaft (303) is close to the discharge port (304), for pressing sludge.

3. The sludge dewatering and drying integrated machine according to claim 1, characterized in that: The spiral pressing dewatering mechanism (3) also includes a discharge port (304) located directly above the filter belt pressing dewatering mechanism (4) for discharging material, a spring connecting rod (305), and a fixed bracket (306). The discharge port (304) is movably sleeved on one side of the output end of the conical spiral shaft (303), and a spring connecting rod (305) is fixedly installed on the other side of the discharge port (304). A fixed bracket (306) is fixedly installed around the spring connecting rod (305).

4. The sludge dewatering and drying integrated machine according to claim 1, characterized in that: The filter belt pressing and dewatering mechanism (4) also includes an overflow prevention plate (411) fixedly installed on both sides of the lower polyester filter belt (407). The overflow prevention plate (411) is set between the upper polyester filter belt (404) and the lower polyester filter belt (407) to achieve the purpose of preventing sludge overflow.

5. The sludge dewatering and drying integrated machine according to claim 4, characterized in that: The filter belt pressing and dehydration mechanism (4) also includes a filtrate collection tank (412) welded to the bottom of the anti-overflow plate (411) to achieve the purpose of collecting filtrate for centralized treatment.

6. The sludge dewatering and drying integrated machine according to claim 5, characterized in that: The filter belt pressing and dehydration mechanism (4) also includes a dispersing toothed disc (413) fixedly installed on one side of the filtrate collection tank (412), and the dispersing toothed disc (413) is located directly below the filter belt pressing and dehydration mechanism (4).

7. The sludge dewatering and drying integrated machine according to claim 1, characterized in that: The upper polyester filter belt (404) and lower polyester filter belt (407) of the filter belt pressing and dewatering mechanism (4) are provided with protrusions.

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