Sludge drying device in sewage treatment process

Abstract

The invention relates to the technical field of sludge drying devices, in particular to a sludge drying device in a sewage treatment process, which comprises a closed thermal wave carbonization furnace, and one side of the top of the closed thermal wave carbonization furnace is provided with a feed chute. The microwave preheating type slitting machine, the conveying and crushing mechanism and other components are arranged, and all the components are coordinated and matched, so that the microwave preheating type slitting machine can preheat, crush and extrude sludge into strips, the viscosity of the sludge is remarkably reduced, and the heating area of the sludge is increased; the conveying and crushing mechanism continuously crushes sludge cakes through a ratchet strip crushing rod in the conveying process, and meanwhile, an eccentric wheel drives a sliding block and a reciprocating plate to move, so that a pushing separation plate uniformly distributes sludge and separates uncrushed cakes, a scraping block timely cleans residues on the surface of the conveying device, and sludge adhesion, accumulation and hardening are effectively prevented; further, the effects of improving the drying uniformity and the treatment efficiency of the sludge and ensuring smooth conveying and stable treatment are achieved.

Description

Technical Field

[0001] This invention relates to the field of sludge drying equipment technology, and specifically to a sludge drying equipment for wastewater treatment processes. Background Technology

[0002] Sludge drying equipment is a core component of wastewater treatment systems. It specifically refers to specialized devices that remove free and bound water from sludge produced after wastewater treatment through technologies such as heat exchange, mechanical extrusion, or hot air purging. Its core function is to reduce the water content and volume of sludge, thereby reducing sludge disposal costs. At the same time, it improves the physicochemical properties of sludge, providing compliant pre-treatment products for subsequent landfilling, incineration, land application, or resource recovery. It is a key piece of equipment for achieving sludge reduction, harmlessness, and resource utilization throughout the entire wastewater treatment process.

[0003] Traditional sludge drying devices typically rely on a heat-conducting medium to transfer heat to the sludge through the metal wall. In actual operation, wet sludge easily adheres to the metal heat transfer surface and gradually forms dirt, creating a gradually thickening insulation layer. This not only leads to a continuous increase in thermal resistance but also causes a significant decrease in heat transfer efficiency as the operating time extends. Furthermore, this surface-to-inside heat transfer method causes the surface moisture of the sludge to evaporate preferentially and dry rapidly, forming a dense and hard shell. This hard shell severely hinders the migration and evaporation of internal moisture, resulting in uneven drying, prolonged processing cycles, and increased energy consumption, thus reducing the effectiveness of the sludge drying device. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a sludge drying device in the sewage treatment process, which can effectively solve the problems of low heat transfer efficiency, uneven drying, long treatment cycle and high energy consumption caused by sludge easily adhering to heat transfer surfaces in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a sludge drying device for wastewater treatment, comprising: a closed-loop hot-wave carbonization furnace, wherein a feeding trough is provided on one side of the top of the closed-loop hot-wave carbonization furnace, and a microwave preheating slitting machine is installed inside the feeding trough; and further comprising: A conveying and crushing mechanism for transporting and crushing sludge includes two sets of conveying devices arranged vertically. Each set of conveying devices has several sets of ratchet crushing rods at its top, connected by pulleys and belt drives. One set of pulleys is fixedly connected to a drive source, which is also fixedly connected to a sealed hot-wave carbonization furnace. An eccentric wheel is fixedly connected to the front of one set of ratchet crushing rods via a reducer. The eccentric wheel is hinged to a slider via a connecting rod. A support plate is slidably connected to one side of the slider, and the support plate is fixedly connected to the sealed hot-wave carbonization furnace. A movable vibration assembly is located at the rear of the slider, with two sets of reciprocating plates arranged symmetrically vertically. A pushing and separating plate is fixedly connected to the top of the two sets of reciprocating plates, located at the top of the conveying device. Scrapers are located at the bottom of the two sets of reciprocating plates, also located at the bottom of the conveying device.

[0006] Furthermore, the movable vibration assembly includes a fixed plate, which is fixedly connected to a slider. The fixed plate has a moving groove on the side near the reciprocating plate, and a movable block is slidably connected inside the moving groove. The movable block is fixedly connected to two sets of reciprocating plates. A vibration rod is provided on one side of the movable block, and the vibration rod is slidably connected to the fixed plate. Several sets of contact rods are fixedly connected to the other end of the vibration rod. A contact block is provided on one side of each set of contact rods, and one side of the contact block is elastically connected to a support plate via a spring. A movable block is fixedly connected to one side of the contact block, and a cam is provided on one side of the movable block. The cam is fixedly connected to a ratchet crusher.

[0007] Furthermore, a sliding groove is provided on the inner side of the support plate, and a sliding block is slidably connected inside the sliding groove. The inner side of the sliding block is fixedly connected to the outer side of the scraper block, and the scraper block is elastically connected to the sliding groove through a spring. An electromagnetic block is magnetically connected to one side of the sliding block, and the electromagnetic block is fixedly connected to the reciprocating plate. A micro switch is provided on the other side of the electromagnetic block, and the micro switch is fixedly connected to the inside of the sliding groove. The micro switch is electrically connected to the electromagnetic block through a wire.

[0008] Furthermore, a connecting groove is provided on the top of the scraper block, a brush plate is fixedly connected inside the connecting groove, a hose is connected to the outside of the connecting groove, and the other end of the hose is connected to an air inlet. A friction block is provided on the outside of the sliding block, and the friction block is slidably connected to the support plate. The friction block is elastically connected to the support plate through a spring, and the friction block is located on the top of the cam.

[0009] Furthermore, the microwave preheating slitting machine includes a microwave preheating device for preheating sludge, a crushing device for crushing the preheated sludge, and a slitting device for extruding the crushed sludge into shape. The microwave preheating device, crushing device, and slitting device are arranged sequentially along the material conveying direction and are interconnected with each other, and are all fixedly connected to the inside of the feeding trough. The bottom of the slitting device is provided with a material distribution conveying hopper for evenly distributing the slitting sludge to two sets of conveying devices.

[0010] Furthermore, the crushing device includes two sets of counter-rotating crushing rollers for crushing sludge, and the slitting device includes two sets of counter-rotating extrusion forming rollers for extruding the crushed sludge into strips.

[0011] Furthermore, a heat exchange device is fixedly connected to the top of the sealed hot wave carbonization furnace. The air inlet end of the heat exchange device is connected to a multi-way pipe, and the multi-way pipe is connected to the top of the sealed hot wave carbonization furnace.

[0012] Furthermore, several sets of internal circulation fans are fixedly connected to the top of the sealed hot wave carbonization furnace.

[0013] Furthermore, the feeding end of the conveying device is equipped with a high-temperature screw conveyor, and the high-temperature screw conveyor is fixedly connected to the interior of the sealed hot wave carbonization furnace.

[0014] Beneficial effects The technical solution provided by this invention has the following advantages compared with the known prior art: I. This invention, through the inclusion of a microwave preheating slitting machine and a conveying and crushing mechanism, enables the microwave preheating slitting machine to preheat, crush, and extrude sludge into strips via the coordinated operation of these components. This significantly reduces the sludge's stickiness and increases its heating surface area. During the conveying process, the conveying and crushing mechanism continuously crushes sludge clumps using a ratchet crusher. Simultaneously, an eccentric wheel drives a slider and reciprocating plate to evenly distribute the sludge and separate uncrushed clumps using a pushing separation plate. A scraper promptly cleans any residue on the surface of the conveying device, effectively preventing sludge adhesion, accumulation, and caking. This, in turn, improves the uniformity of sludge drying, increases processing efficiency, and ensures smooth conveying and stable processing.

[0015] Second, this invention incorporates components such as a movable vibration assembly, a sliding block, an electromagnetic block, and a micro switch. The cam in the movable vibration assembly drives the contact block to vibrate at high frequency, which is transmitted to the separation plate to enhance the sludge dispersion and anti-sticking effect. At the same time, the electromagnetic scraper system automatically scrapes and resets the scraper during reciprocating motion, and the brush plate and hose air inlet structure further enhance cleaning. Thus, it achieves automatic continuous cleaning, prevents residual sludge from affecting the uniformity of drying, extends the service life of components, and improves the overall operational stability.

[0016] Third, this invention, by incorporating components such as a heat exchange device, multiple pipelines, a closed-loop hot-wave carbonization furnace, multiple sets of internal circulation fans, and a high-temperature screw conveyor, achieves energy recycling by recovering and reusing waste heat from the drying process through the heat exchange device; the closed-loop hot-wave carbonization furnace, in conjunction with the internal circulation fans, ensures uniform temperature and sufficient airflow circulation within the furnace, resulting in consistent and efficient carbonization of the sludge; and the high-temperature screw conveyor ensures continuous and stable transport of high-temperature materials to subsequent processing stages; thus achieving a comprehensive effect of energy saving and consumption reduction, improved carbonization quality and processing continuity, and environmentally friendly emissions and efficient operation throughout the entire process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the sealed hot wave carbonization furnace of the present invention. Figure 3 This is a cross-sectional schematic diagram of the microwave preheating slitting machine of the present invention; Figure 4 This is a partially disassembled schematic diagram of the conveying and crushing mechanism of the present invention; Figure 5 This is a bottom view of the heat exchange device and multi-channel pipeline of the present invention; Figure 6 This is a partial cross-sectional schematic diagram of the conveying and crushing mechanism of the present invention; Figure 7 This is a schematic diagram of the disassembled cross-section of the active vibration component of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle; Figure 9 For the present invention Figure 7 Enlarged diagram of point B in the middle.

[0019] Reference numerals: 1. Sealed hot-wave carbonization furnace; 2. Microwave preheating slitting machine; 21. Microwave preheating device; 22. Crushing device; 23. Slitting device; 24. Material conveying hopper; 3. Conveying and crushing mechanism; 31. Conveying device; 32. Ratchet crushing rod; 33. Eccentric wheel; 34. Sliding block; 35. Support plate; 36. Movable vibration assembly; 361. Fixed plate; 362. Movable block; 363. Vibrating rod; 364. 365. Contact rod; 366. Contact block; 367. Moving block; 368. Cam; 39. Reciprocating plate; 30. Pushing separation plate; 50. Scraper; 61. Sliding block; 72. Electromagnetic block; 83. Micro switch; 9. Brush plate; 10. Hose; 11. Air inlet hopper; 12. Friction block; 13. Crushing roller; 14. Extrusion molding roller; 15. Heat exchange device; 16. Multi-channel pipeline; 17. Internal circulation fan; 18. High-temperature screw conveyor. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to embodiments.

[0022] See attached document Figure 1-9A sludge drying device for wastewater treatment includes: a closed-type hot-wave carbonization furnace 1, with a feeding chute on one side of the top of the closed-type hot-wave carbonization furnace 1, and a microwave preheating slitting machine 2 installed inside the feeding chute; it also includes: a conveying and crushing mechanism 3 for conveying and crushing sludge, the conveying and crushing mechanism 3 including two sets of conveying devices 31, which are arranged vertically; each set of conveying devices 31 has several sets of ratchet crushing rods 32 at its top, and the ratchet crushing rods 32 are connected to each other by pulleys and belt drive; one set of pulleys is fixedly connected to a drive source, which is existing technology and can be a motor of suitable model and power, etc.; the drive source is fixedly connected to the closed-type hot-wave carbonization furnace 1, and one set of ratchet crushing rods... An eccentric wheel 33 is fixedly connected to the front side of the crushing rod 32 via a reducer. The eccentric wheel 33 is hinged to a slider 34 via a connecting rod. A support plate 35 is slidably connected to one side of the slider 34, and the support plate 35 is fixedly connected to the enclosed hot-wave carbonization furnace 1. A movable vibration assembly 36 is provided on the rear side of the slider 34. Two sets of reciprocating plates 37 are provided on the rear side of the slider 34, and the two sets of reciprocating plates 37 are arranged symmetrically. A pushing separation plate 38 is fixedly connected to the top of the two sets of reciprocating plates 37, and the pushing separation plate 38 is located at the top of the conveying device 31. Scrapers 39 are provided at the bottom of the two sets of reciprocating plates 37, and the scrapers 39 are located at the bottom of the conveying device 31. The enclosed hot-wave carbonization furnace 1 is used to support all components and form a closed processing space, effectively reducing heat loss. To ensure thermal efficiency and stable, unfluctuating furnace temperature, suitable temperature conditions are provided for efficient sludge conversion, while preventing pollutant leakage to meet environmental protection requirements. Simultaneously, a stable and controllable environment is provided for sludge drying and carbonization, ensuring full conversion and uniform quality. The microwave preheating slitting machine 2 is used to preheat, crush, and slit the sludge, reducing its stickiness and increasing the heating area, laying a solid foundation for subsequent drying and carbonization. During operation, two sets of vertically and horizontally positioned conveying devices 31 synchronously transport the sludge, increasing the throughput per unit time and improving efficiency. This also ensures uniform heat contact during transport, guaranteeing consistent drying and carbonization effects. The drive source provides power to the ratchet crushing rod 32, causing it to rotate and drive multiple sets of ratchet bars via pulleys and belts. The pulverizing rods 32 operate synchronously, efficiently pulverizing the sludge on the conveying device 31, completely breaking up the clumps, and preventing the clumps from hindering heat transfer and causing uneven drying. One set of ratchet pulverizing rods 32 drives the eccentric wheel 33 to rotate through a reducer. The eccentric wheel 33 pulls the slider 34 to slide back and forth on the support plate 35 through a connecting rod. The slider 34 drives the reciprocating plate 37 to move synchronously with the help of the movable vibration component 36. The pushing separation plate 38 at the top of the reciprocating plate 37 can push and separate the sludge on the conveying device 31, preventing the sludge from adhering to the conveying device 31 and reducing the adhesion of sludge on the conveyor belt. The scraper 39 at the bottom cleans the sludge remaining on the surface of the conveying device 31 in time, preventing accumulation from affecting the smoothness of the conveying and preventing residual sludge from contaminating the materials to be processed later.This effectively solves the problems of uneven heating of sludge, low treatment efficiency, and easy leakage of pollutants in traditional drying technologies; See attached document Figure 2-8 The movable vibration component 36 is used to convert the rotational motion of the ratchet crusher 32 into directional high-frequency micro-vibration, enhancing the sludge-dispersing effect of the separation plate 38. It includes a fixed plate 361, which is fixedly connected to the slider 34. A movable groove is formed on the side of the fixed plate 361 near the reciprocating plate 37, and a movable block 362 is slidably connected inside the movable groove. The movable block 362 is fixedly connected to two sets of reciprocating plates 37. A vibration rod 363 is provided on one side of the movable block 362. 3. The vibrating rod 363 is slidably connected to the fixed plate 361. Several sets of contact rods 364 are fixedly connected to the other end of the vibrating rod 363. A contact block 365 is provided on one side of the contact rods 364. One side of the contact block 365 is elastically connected to the support plate 35 by a spring. A moving block 366 is fixedly connected to one side of the contact block 365. A cam 367 is provided on one side of the moving block 366. The cam 367 is fixedly connected to the ratchet crushing rod 32. The cam 367 rotates synchronously with the ratchet crushing rod 32, driving the moving block 366. The contact block 365 is displaced by the push. After the protrusion of the cam 367 rotates away, the contact block 365 quickly resets under the elastic action of the spring and repeatedly collides with the contact rod 364 on the vibrating rod 363. This drives the vibrating rod 363 and the movable block 362 to generate directional high-frequency linear vibration in the moving groove of the fixed plate 361 (the vibration is caused by the vibrating rod 363 being continuously subjected to the impact force from the same side, thus forming a stable, reciprocating high-frequency vibration output). Since the movable block 362 is fixedly connected to the reciprocating plate 37, the vibration can be directly transmitted to the pushing separation plate 38, which not only significantly enhances the sludge pushing and separation effect, breaks up small clumps to avoid caking, and improves the uniformity of sludge drying, but also reduces the stubborn adhesion of sludge on the surface of the conveying device 31, reduces the difficulty of subsequent cleaning, reduces the scraping burden of the scraper 39 on the bottom of the conveying device 31, avoids residual sludge from hindering the conveying efficiency, and also ensures that the sludge is heated evenly during the drying process, accelerates the evaporation of internal moisture, improves the heat exchange efficiency, and further ensures the stability of the overall treatment effect. The support plate 35 has a sliding groove on its inner side, and a sliding block 5 is slidably connected inside the sliding groove. The inner side of the sliding block 5 is fixedly connected to the outer side of the scraper block 39, and the scraper block 39 is elastically connected to the sliding groove via a spring. An electromagnetic block 6 is magnetically connected to one side of the sliding block 5, and the electromagnetic block 6 is fixedly connected to the reciprocating plate 37. A micro switch 7 is provided on the other side of the electromagnetic block 6, and the micro switch 7 is fixedly connected to the inside of the sliding groove. The micro switch 7 is electrically connected to the electromagnetic block 6 via a wire. The sliding block 5 can slide flexibly in the sliding groove of the support plate 35. The scraper block 39 is elastically connected to the sliding groove via a spring. The electromagnetic block 6 and the sliding block 5 are magnetically engaged. When the electromagnetic block 6 is activated, it can drive the scraper block 39 to move synchronously with the reciprocating plate 37. During the movement of the scraper block 39, the sliding block 5 is compressed by the scraper block 5. When the electromagnetic block 6 moves to the limit position with the reciprocating plate 37, it triggers the micro switch 7. The micro switch 7 closes the electromagnetic block 6. After the magnetic attraction disappears, the spring resets and pushes the scraper block 39 to move in the opposite direction through the sliding block 5, quickly scraping off the residual sludge on the surface of the conveying device 31 to ensure thorough cleaning. When the micro switch 7 is no longer triggered, the electromagnetic block 6 restarts and generates a magnetic attraction, which again drives the scraper block 39 to move with the reciprocating plate 37, forming a continuous cleaning cycle. This avoids sludge accumulation that hinders conveying efficiency and affects drying uniformity, and also reduces hard friction between the scraper block 39 and the conveying device 31, extending the service life of the components. The micro switch 7 and the electromagnetic block 6 are existing technologies. The scraper block 39 has a connecting groove at its top, with a brush plate 8 fixedly connected inside the groove. A hose 9 is connected to the outside of the groove, and the other end of the hose 9 is connected to an air inlet hopper 10. A friction block 11 is provided on the outside of the sliding block 5, and the friction block 11 is slidably connected to the support plate 35. The friction block 11 is elastically connected to the support plate 35 by a spring (not shown in the figure). The friction block 11 is located on top of the cam 367. The brush plate 8 in the connecting groove at the top of the scraper block 39 can accurately clean the fine residual sludge on the surface of the conveying device 31, improving the cleaning fineness and preventing the long-term accumulation of fine impurities from affecting the operation of the equipment. The air inlet hopper 10 collects the hot airflow generated by the internal circulating fan 16 in conjunction with the closed hot wave carbonization furnace 1. After being transported to the connecting groove through the hose 9, it is blown out from the gap of the brush plate 8. This not only helps to blow away the sludge residue and further enhances the cleaning effect, but also reduces the amount of sludge on the conveying device 31 with the help of the hot airflow. Secondary adhesion to the surface; the friction block 11 is elastically connected to the support plate 35 by a spring. When the sliding block 5 moves, it will drive the friction block 11 to generate moderate friction vibration, which will not only increase the scraping force of the scraper 39 on the surface of the conveying device 31, but also prevent the scraped impurities from being completely removed and affecting the cleaning effect. It will also enhance the cleaning penetration of the brush plate 8, ensuring that the mud in the small gaps can also be cleaned. When the cam 367 rotates, it will continuously push the friction block 11 up and down, which will drive the scraper 39 and the brush plate 8 to generate continuous vibration. This will allow the vibration force to act on the impurities repeatedly during the cleaning process, thoroughly remove stubborn residues, ensure the surface of the conveying device 31 is clean, and avoid the problem of increased conveying resistance or decreased heat transfer efficiency caused by the accumulation of mud. It is worth noting that the friction block 11 includes a connecting frame and a friction component. One end of the connecting frame is located at the top of the cam 367 and is pushed when the cam 367 moves. The friction component is used to rub the sliding block 5. See attached document Figure 1-3The microwave preheating slitting machine 2 is used to pre-treat sludge for subsequent uniform and efficient drying by reducing viscosity through microwave preheating, mechanically crushing, and extruding into strips. It includes a microwave preheating device 21 for preheating the sludge, a crushing device 22 for crushing the preheated sludge, and a slitting device 23 for extruding the crushed sludge into strips. The microwave preheating device 21, crushing device 22, and slitting device 23 are arranged sequentially along the material conveying direction and interconnected, and are all fixedly connected to the inside of the feed trough. A material distribution conveying hopper 24 is provided at the bottom of the slitting device 23 to evenly distribute the slidized sludge onto two sets of conveying devices 31. The microwave preheating device 21 first preheats the feed sludge... Internal direct heating raises the temperature to the target value, effectively reducing sludge viscosity and initial moisture, clearing obstacles for subsequent crushing and slitting. The crushing device 22 then breaks down large sludge pieces, and the slitting device 23 compresses the crushed sludge into strips, significantly increasing the contact area between the sludge and the heat medium, ensuring uniform and efficient drying and carbonization. The material distribution and conveying hopper 24 evenly distributes the strip-shaped sludge to two sets of conveying devices 31, ensuring a balanced processing load between the two sets of equipment and avoiding overload of a single device that could lead to decreased processing efficiency or unstable results. This achieves orderly and efficient operation of the sludge pretreatment process, reducing energy consumption and difficulty in subsequent core treatments and laying a solid foundation for overall treatment effectiveness. The crushing device 22 includes two sets of counter-rotating crushing rollers 12 for crushing sludge, and the slitting device 23 includes two sets of counter-rotating extrusion forming rollers 13 for extruding the crushed sludge into strips. The two sets of counter-rotating crushing rollers 12 generate extrusion and shearing forces through relative rotation, which can quickly and efficiently crush the preheated sludge, decompose large sludge pieces into fine particles, avoid large sludge pieces from hindering the subsequent processing, and reduce the difficulty of subsequent slitting. The two sets of counter-rotating extrusion forming rollers 13 uniformly extrude fine sludge particles into strips. The strip sludge has a regular structure, which not only facilitates stable transportation on the conveying device 31 and prevents slippage and accumulation, but also ensures uniform heating area during the subsequent carbonization process, reduces local insufficient drying or over-drying, and further improves the overall quality and processing efficiency of sludge drying and carbonization. The closed-loop hot wave carbonization furnace 1 is fixedly connected to the top of a heat exchange device 14. The air inlet of the heat exchange device 14 is connected to a multi-port pipe 15, which is also connected to the top of the closed-loop hot wave carbonization furnace 1. The multi-port pipe 15 can collect the high-temperature waste gas generated during the sludge drying and carbonization process in the closed-loop hot wave carbonization furnace 1 and transport it to the heat exchange device 14. The device is equipped with a heat medium outlet, a cold medium inlet, and a cold medium outlet, which can efficiently recover the heat in the waste gas. The recovered heat can be reintroduced into the device to assist in sludge drying and can be flexibly adjusted according to actual usage needs. This reduces energy waste, improves energy utilization efficiency, and reduces heat loss caused by direct emission of high-temperature waste gas. At the same time, the waste gas discharged through the heat exchange device 14 is dehumidified, defrosted, and deodorized before being discharged, effectively reducing the impact on the environment and making the entire sludge treatment process more energy-efficient and environmentally friendly. The top of the sealed hot wave carbonization furnace 1 is fixedly connected to several sets of internal circulation fans 16, which are arranged at equal intervals. Multiple sets of internal circulation fans 16 drive the hot airflow inside the furnace to circulate, ensuring that the hot airflow evenly covers all areas of the furnace, preventing localized overheating or underheating of the sludge, and ensuring uniform drying and carbonization of all sludge, significantly improving the quality of the finished product. Simultaneously, the circulating airflow accelerates sludge moisture evaporation, shortens the processing cycle, further improves overall processing efficiency, and reduces energy consumption. A high-temperature screw conveyor 17 is installed at the discharge end of the conveying device 31, and the high-temperature screw conveyor 17 is connected to... The internal fixed connection of the closed hot wave carbonization furnace 1; the high-temperature screw conveyor 17 is located at the discharge end of the conveying device 31, which can smoothly receive the pre-treated sludge and continuously transport it to the subsequent stages. Its screw structure design can not only prevent sludge from falling or accumulating during the conveying process, but also reduce the adhesion of sludge to the inner wall of the conveyor, reducing the difficulty of subsequent cleaning; at the same time, it has high temperature adaptability, ensuring stable operation in the high temperature environment after drying and carbonization, effectively ensuring the continuity of the entire sludge treatment process, avoiding the decrease in treatment efficiency or process stagnation due to the interruption of conveying, and further improving the stability and reliability of the overall treatment.

[0023] It is worth noting that the specific selection of elastic elements such as springs and other key components involved in this technical solution should be adapted according to actual working conditions such as pressure, frequency, and load to meet the performance requirements for long-term stable operation (and corresponding components and structures can be replaced or adjusted according to specific usage needs). Meanwhile, the sliding and movement of each moving part are achieved through reasonable limiting and guiding structures in existing technologies (not fully shown in the figure) to ensure coordinated function and reliable operation of each mechanism. Furthermore, depending on the specific usage environment and requirements, conventional protective or additional limiting structures can be added to relevant components. It is also worth noting that the naturally shaped... This forms a low-temperature drying zone. The principle is that the hot airflow driven by the internal circulation fan 16 first contacts and flows through the high-moisture sludge that has just entered the furnace. Due to heat exchange, the temperature of the airflow in this zone is maintained at a relatively low level before reaching the core high-temperature zone, thus forming a low-temperature drying zone for preliminary dehydration of the sludge at the front end of the furnace. It is worth noting that the preheating temperature of the microwave preheating device 21 can be flexibly adjusted according to specific processing requirements to achieve effective control of the sludge viscosity and moisture content. The closed-type hot wave carbonization furnace 1 adopts existing mature heating technology to ensure uniform temperature distribution inside, so as to achieve efficient and stable carbonization treatment of sludge.

[0024] Working principle: During use, the sludge is first processed by the microwave preheating slitting machine 2. The microwave preheating device 21 directly heats the sludge internally to reduce its viscosity and initial moisture. Then, the two sets of counter-rotating crushing rollers 12 of the crushing device 22 crush the preheated sludge into fine particles. Subsequently, the two sets of counter-rotating extrusion forming rollers 13 of the slitting device 23 extrude the crushed sludge into strips. Finally, the material distribution conveying hopper 24 evenly distributes the strip-shaped sludge to the upper and lower conveying devices 31. This effectively increases the heating area of ​​the sludge and ensures that the processing load of the two conveying devices 31 is balanced, laying a good foundation for subsequent drying and carbonization. After the drive source is started, it drives a set of ratchet crushers 32 to rotate. Through the transmission of pulleys and belts, several sets of ratchet crushers 32 on the top of the two sets of conveying devices 31 operate synchronously, continuously crushing the strip-shaped sludge on the conveying devices 31, completely breaking up any possible agglomeration, and preventing agglomeration from hindering heat transfer and affecting the drying effect. At the same time, one set of ratchet crushers 32 drives an eccentric wheel 33 to rotate via a reducer and is located on the side near the discharge end of the conveying device 31. The eccentric wheel 33 pulls a slider 34 to slide back and forth on the support plate 35 via a connecting rod. The slider 34 drives two sets of symmetrical reciprocating plates 37 to move synchronously with the help of a fixed plate 361 and a movable block 362. The top of the reciprocating plate 37 pushes the separation plate. 38 will push the sludge away from the conveying device 31 to prevent sludge from adhering and the ratchet crusher 32 from being unable to effectively crush it. It can also separate incompletely broken clumps and reduce sludge adhesion. At the same time, the cam 367 rotates with the ratchet crusher 32 to push the moving block 366. The contact block 365 quickly resets under the elastic action of the spring and repeatedly collides with the contact rod 364 on the vibrating rod 363. This causes the moving block 362 to drive the reciprocating plate 37 to generate directional high-frequency vibration, thereby enhancing the pushing and separating effect of the pushing and separating plate 38 on the material (making the pushing and separating plate 38 generate a continuous forward scraping force to effectively scrape off the sludge), further enhancing the sludge dispersing effect and reducing the stubborn adhesion of sludge on the surface of the conveying device 31. During the sludge conveying and crushing process, scraper 39 simultaneously cleans the bottom of conveying device 31. Sliding block 5 in the sliding groove of support plate 35 is fixedly connected to scraper 39. Electromagnetic block 6 and sliding block 5 are magnetically coupled to drive scraper 39 to move with reciprocating plate 37. When electromagnetic block 6 moves to its limit position and triggers microswitch 7, electromagnetic block 6 closes, and the compressed spring resets, pushing scraper 39 to move in the opposite direction to quickly scrape off residual sludge. After microswitch 7 is deactivated, electromagnetic block 6 restarts, forming a continuous cleaning cycle. The brush plate 8 in the top connecting groove can clean up fine residual sludge. The hot air in the air inlet hopper 10 is transported to the connecting groove through the hose 9 and blown out from the gap of the brush plate 8 to assist in cleaning the residue. At the same time, the friction block 11 on the outside of the sliding block 5 is elastically connected to the support plate 35. When the sliding block 5 moves, friction vibration is generated. The rotation of the cam 367 will also push the friction block 11 to move up and down, causing the scraper 39 and the brush plate 8 to vibrate continuously, ensuring that the surface of the conveying device 31 is thoroughly cleaned and avoiding residual sludge from affecting the smoothness of the conveying and the quality of the subsequent processed materials. Meanwhile, the closed-loop hot-wave carbonization furnace starts generating heat continuously upon startup, heating, drying, and carbonizing the preheated sludge on the conveying device 31. Multiple sets of internal circulating fans 16 drive the hot airflow inside the furnace to circulate, ensuring that the hot airflow evenly covers all areas within the closed-loop hot-wave carbonization furnace 1. This ensures that all sludge is fully and uniformly dried and carbonized, effectively shortening the processing cycle and forming a sludge treatment process of "feeding - material preheating - slitting and granulation - low-temperature drying - high-temperature carbonization - high-temperature carbonization and exiting the furnace." During this process, the closed-loop... The heat exchange device 14 at the top of the hot wave carbonization furnace 1 collects the high-temperature waste gas generated inside the closed hot wave carbonization furnace 1 through multi-channel pipes 15, recovers the heat in the waste gas and reintroduces it into the device to assist in sludge drying, thereby improving energy utilization efficiency. The waste gas treated by the heat exchange device 14 is then discharged after being treated by existing technology, which reduces energy waste and environmental impact. Through the coordinated cooperation of various components, the entire device achieves efficient, uniform and environmentally friendly drying and carbonization of sludge, ensuring the continuity and reliability of the treatment process.

[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sludge drying device for wastewater treatment, comprising a closed-loop hot-wave carbonization furnace (1), characterized in that: The sealed hot wave carbonization furnace (1) has a feeding chute on one side of its top, and the feeding chute is equipped with a microwave preheating slitting machine (2), and also includes: A conveying and crushing mechanism (3) for conveying and crushing sludge includes two sets of conveying devices (31), which are arranged vertically. Several sets of ratchet crushing rods (32) are provided on the top of each of the two sets of conveying devices (31), and these ratchet crushing rods (32) are connected by pulleys and belt drives. One set of pulleys is fixedly connected to a drive source, which is fixedly connected to a sealed hot-wave carbonization furnace (1). An eccentric wheel (33) is fixedly connected to the front side of one set of ratchet crushing rods (32) via a reducer. The eccentric wheel (33) is hinged to a connecting rod. A slider (34) is slidably connected to a support plate (35) on one side, and the support plate (35) is fixedly connected to a sealed hot wave carbonization furnace (1). A movable vibration component (36) is provided on the rear side of the slider (34). Two sets of reciprocating plates (37) are provided on the rear side of the slider (34), and the two sets of reciprocating plates (37) are arranged symmetrically up and down. A push separation plate (38) is fixedly connected to the top of the two sets of reciprocating plates (37), and the push separation plate (38) is located on the top of the conveying device (31). A scraper (39) is provided at the bottom of the two sets of reciprocating plates (37), and the scraper (39) is located at the bottom of the conveying device (31).

2. The sludge drying device in a wastewater treatment process according to claim 1, characterized in that, The movable vibration assembly (36) includes a fixed plate (361), which is fixedly connected to a slider (34). A movable groove is provided on the side of the fixed plate (361) near the reciprocating plate (37), and a movable block (362) is slidably connected inside the movable groove. The movable block (362) is fixedly connected to two sets of reciprocating plates (37). A vibration rod (363) is provided on one side of the movable block (362), and the vibration rod (363) is slidably connected to the fixed plate (361). Next, a number of contact rods (364) are fixedly connected to the other end of the vibrating rod (363). A contact block (365) is provided on one side of the contact rods (364), and one side of the contact block (365) is elastically connected to the support plate (35) by a spring. A moving block (366) is fixedly connected to one side of the contact block (365), and a cam (367) is provided on one side of the moving block (366), and the cam (367) is fixedly connected to the ratchet crusher (32).

3. The sludge drying device in a wastewater treatment process according to claim 2, characterized in that, The inner side of the support plate (35) is provided with a sliding groove, and a sliding block (5) is slidably connected inside the sliding groove. The inner side of the sliding block (5) is fixedly connected to the outer side of the scraper (39), and the scraper (39) is elastically connected to the sliding groove through a spring. An electromagnetic block (6) is magnetically connected to one side of the sliding block (5), and the electromagnetic block (6) is fixedly connected to the reciprocating plate (37). A micro switch (7) is provided on the other side of the electromagnetic block (6), and the micro switch (7) is fixedly connected to the inside of the sliding groove. The micro switch (7) is electrically connected to the electromagnetic block (6) through a wire.

4. The sludge drying device in a wastewater treatment process according to claim 3, characterized in that, The top of the scraper (39) is provided with a connecting groove, and a brush plate (8) is fixedly connected inside the connecting groove. A hose (9) is connected to the outside of the connecting groove, and the other end of the hose (9) is connected to an air inlet (10). A friction block (11) is provided on the outside of the sliding block (5), and the friction block (11) is slidably connected to the support plate (35). The friction block (11) is elastically connected to the support plate (35) through a spring. The friction block (11) is located on the top of the cam (367).

5. A sludge drying device in a wastewater treatment process according to claim 1, characterized in that, The microwave preheating slitting machine (2) includes a microwave preheating device (21) for preheating sludge, a crushing device (22) for crushing the preheated sludge, and a slitting device (23) for extruding the crushed sludge into shape. The microwave preheating device (21), the crushing device (22), and the slitting device (23) are arranged sequentially along the material conveying direction and connected to each other. They are all fixedly connected to the inside of the feed trough. The bottom of the slitting device (23) is provided with a material distribution conveying hopper (24) for evenly distributing the slitting sludge to two sets of conveying devices (31).

6. A sludge drying device in a wastewater treatment process according to claim 5, characterized in that, The crushing device (22) includes two sets of counter-rotating crushing rollers (12) for crushing sludge, and the slitting device (23) includes two sets of counter-rotating extrusion forming rollers (13) for extruding the crushed sludge into strips.

7. A sludge drying device in a wastewater treatment process according to claim 1, characterized in that, The top of the sealed hot wave carbonization furnace (1) is fixedly connected to a heat exchange device (14), the air inlet of the heat exchange device (14) is connected to a multi-way pipe (15), and the multi-way pipe (15) is connected to the top of the sealed hot wave carbonization furnace (1).

8. A sludge drying device in a wastewater treatment process according to claim 1, characterized in that, The top of the sealed hot wave carbonization furnace (1) is fixedly connected with several sets of internal circulation fans (16), and the several sets of internal circulation fans (16) are arranged at equal distances.

9. A sludge drying device in a wastewater treatment process according to claim 1, characterized in that, The feeding end of the conveying device (31) is equipped with a high-temperature screw conveyor (17), and the high-temperature screw conveyor (17) is fixedly connected to the interior of the closed hot wave carbonization furnace (1).

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