Integrated system for dehydration and packaging of slaughter residues

Abstract

The utility model discloses a slaughter residue dehydration and packing integrated system, including setting gradually along material processing sequence: cutting type sewage pump, it sets up in pump pit, is used for breaking up slaughter residue, be provided with liquid level sensor in pump pit, is used for detecting liquid level and starting and stopping pump, cutting type sewage pump is connected with the discharge pipe, rotary filter press integrated machine is used for solid -liquid separation and press dewatering to the residue after breaking up, and packing and film packaging integrated machine are used for packing and film packaging to the residue after dewatering, and the inlet of loading conveyor belt is equipped with incoming material detection sensor to be used for detecting incoming material and triggering packing process, still include: PLC controller, it is electrically connected with cutting type sewage pump, rotary filter press integrated machine and packing and film packaging integrated machine respectively, and PLC controller still connects liquid level sensor, incoming material detection sensor, it is suitable for each type slaughterhouse, can effectively remove the solid contaminant in waste water and reduce the processing burden, reduce stink, bacteria produce.

Description

Technical Field

[0001] This utility model relates to the technology of slaughterhouse waste treatment, and in particular to an integrated system for dehydrating and packaging slaughterhouse waste, which is suitable for many types of slaughterhouses. Background Technology

[0002] The slaughtering industry is an important part of my country's livelihood and food industry. In recent years, with the increase in the number of livestock, the processing volume of livestock products has been increasing. However, the production process generates a large amount of complex slaughter residues, mainly including feathers, bone fragments, fat, visceral fragments, blood, and undigested food. These residues mix with rinsing water to form a high-concentration, high-oil, and high-organic-content liquid, and its treatment has always been a serious challenge for the industry.

[0003] Currently, the main methods for handling slaughterhouse waste are as follows: 1. Manual salvage and collection: At the end of drainage ditches or in collection pools in slaughterhouses, workers manually scoop out the wet residue using tools such as mesh screens. The scooped-out wet residue has an extremely high moisture content and is directly packed into ton bags or plastic woven bags. This method has several drawbacks: it is extremely labor-intensive, creates a harsh working environment, and has a significant impact on workers' physical and mental health. Furthermore, manual labor cannot achieve continuous operation, has limited processing capacity, and is ill-suited for large-scale slaughter production. The residue, whether manually scooped or left in open piles, is highly susceptible to fermentation, producing ammonia, hydrogen sulfide, and other foul-smelling gases, attracting flies and mosquitoes, breeding bacteria, and severely polluting the surrounding environment. Simultaneously, the ton bags generate a large amount of leachate (dripping water) during storage and transportation, causing pollution to the ground and transportation routes. The residue with excessively high moisture content cannot be directly utilized for subsequent resource recovery (such as making organic fertilizer or feed ingredients), resulting in high transportation costs and extremely low economic value.

[0004] 2. Traditional mechanical separation and simple dehydration: Some slaughterhouses use simple bar screens or screw conveyors for preliminary solid-liquid separation of slaughterhouse waste. This method has several drawbacks: long fibers such as feathers and fascia easily become entangled in the bar screen or screw shaft, while hard objects like bone fragments can easily jam the equipment, leading to frequent shutdowns for cleaning and a significant maintenance workload. The waste after this simple separation still has a high moisture content, failing to meet the requirements for waste reduction and resource recovery. Furthermore, such equipment often operates independently, requiring manual monitoring, start-up, shutdown, and material transfer, failing to form a closed-loop automated production line.

[0005] 3. The sewage pump directly delivers wastewater to the sewage treatment system: Some companies attempt to directly pump wastewater containing slaughterhouse residue to their on-site wastewater treatment plants using cutting pumps. This method has several drawbacks: while cutting pumps can shred slaughterhouse residue, the long-distance transport of this mixture containing long fibers and hard particles can easily cause blockages in the pumps, valves, and pipes, leading to unstable system operation. Furthermore, the large amount of solid pollutants entering the wastewater treatment system significantly increases the processing load on grit chambers, equalization tanks, biological treatment tanks, and sludge dewatering systems, resulting in higher operating costs and difficulty in achieving the required treatment efficiency.

[0006] Based on this, the applicant has researched a new technical solution to address the above problems. Utility Model Content

[0007] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide an integrated system for dehydrating and packaging slaughter residues. This system achieves fully automated and closed-loop processing of dirty and perishable slaughter residues into clean, stable, and easily transportable resources, solving environmental, hygiene, and efficiency issues, and is suitable for many types of slaughterhouses.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: An integrated system for dehydrating and packaging slaughterhouse waste includes the following components arranged sequentially along the material processing order: A cutting-type sewage pump is installed in a pump pit and is used to crush slaughter residue; a liquid level sensor is installed in the pump pit to detect the liquid level and start and stop the pump; the cutting-type sewage pump is connected to a discharge pipe. This rotary filter press is used for solid-liquid separation and dewatering of crushed residue. It features a frame, a screen cylinder rotatably mounted on the frame, a backflushing pipe located on the outer side of the screen cylinder, and a screw pressing mechanism inside the screen cylinder. The residue mixture from the discharge pipe is fed into the screen cylinder. A collection tank located below the screen cylinder is situated at the bottom of the frame, connected to a wastewater pipe. The screw pressing mechanism includes a pressing body and a screw shaft extending axially along the screen cylinder. The upper end of the pressing body is the filter residue inlet, and the lower end is the drain outlet. A slag discharge channel is connected to the upper end of the pressing body corresponding to the outlet end of the screw shaft. The outer end of the slag discharge channel extends outside the frame, and a pressure cap is provided at the outlet end of the slag discharge channel. The baling and wrapping integrated machine is used to bale and wrap dehydrated residue; it includes: a feeding conveyor belt for receiving residue discharged from the rotary filter press; a baling and pressing roller connected to the feeding conveyor belt for rolling and pressing the residue into shape; and a wrapping bracket for covering the formed bales with film; a material detection sensor is installed at the feed inlet of the feeding conveyor belt to detect incoming material and trigger the baling process; It also includes: a PLC controller, which is electrically connected to the cutting-type sewage pump, the rotary filter press, and the bundling and wrapping machine; the PLC controller is also connected to the liquid level sensor and the incoming material detection sensor.

[0009] As a preferred option, a feed chute is provided at one end of the screen cylinder, which is connected between the discharge pipe and the screen cylinder, and is used to guide the crushed residue mixture into the screen cylinder.

[0010] As a preferred option, a solenoid valve for controlling the backflushing pipeline is installed on the backflushing pipeline, and a PLC controller is connected to the solenoid valve.

[0011] As a preferred embodiment, an openable pit cover is provided on the top of the pump pit to make the pump pit a sealed pit, and at least part of the pit cover is a first transparent structure for viewing the inside of the pump pit from the outside.

[0012] As a preferred embodiment, a second transparent structure is provided on the side of the equipment frame, corresponding to at least the feed chute, screen cylinder, and filter cake inlet, for viewing the feed chute, screen cylinder, and filter cake inlet from the outside.

[0013] As a preferred option, the discharge pipe is seamlessly connected to the rotary filter press, and the slag discharge channel is seamlessly connected to the bundling and wrapping film.

[0014] As a preferred option, the PLC controller is also connected to a data communication module, which is used to upload equipment operation data to a remote monitoring center or receive remote control commands.

[0015] As a preferred embodiment, the cutting sewage pump includes a pump body and an impeller. The impeller is provided with a cutting mechanism, which includes multiple layers and multiple points of alloy blades distributed in the axial and radial directions of the impeller, and the angles of the blades are staggered.

[0016] As a preferred embodiment, the drive motor of the screen cylinder is equipped with a speed sensor, and the drive motor of the screw shaft is equipped with a current or torque sensor. The PLC controller is connected to the speed sensor and the current or torque sensor respectively to monitor the load and adjust the operating parameters.

[0017] As a preferred option, the PLC controller is equipped with a touch screen operating interface to display the real-time status of each device and alarm information, and to set process parameters; the PLC controller is also connected to an audible and visual alarm to issue warnings when equipment malfunctions or abnormalities occur.

[0018] Compared with existing technologies, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly targets the treatment of slaughterhouse waste, researching a system that integrates multiple processes such as crushing, solid-liquid separation, pressing and dehydration, bundling, and wrapping. Through a PLC system, it achieves fully automatic control, freeing manual labor from tedious and high-intensity operations, effectively reducing labor costs and reliance on operator experience. It realizes fully automated and closed-loop processing from dirty and perishable slaughterhouse waste to clean, stable, and easily transportable resources, solving environmental, hygiene, and efficiency issues. This integrated slaughterhouse waste dehydration and packaging system is suitable for many types of slaughterhouses, possessing numerous advantages such as high automation, labor saving, energy saving, environmental protection, resource utilization, small footprint, and stable operation, making it suitable for widespread application.

[0019] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a top view of the integrated system for dehydrating and packaging slaughter residue, according to an embodiment of the present invention. Figure 2 This is a front view structural diagram of the rotary filter and press integrated machine according to an embodiment of the present utility model; Figure 3 This is a representative physical structural diagram of the integrated system for dehydrating and packaging slaughter residue according to an embodiment of the present invention (the sealed shell of the equipment is not shown). Figure 4 This is a flowchart illustrating the process by which slaughterhouse residue wastewater enters the collection tank and is treated by a cutting-type sewage pump, according to an embodiment of this utility model. Figure 5 This is a flowchart illustrating the process of crushed residue entering a rotary filter press integrated machine according to an embodiment of this utility model. Figure 6 This is a flowchart of the integrated system for dehydrating and packaging slaughter residue, according to an embodiment of this utility model. Figure 7 This is an electrical control connection diagram of an integrated system for dehydrating and packaging slaughter residue, according to an embodiment of this utility model. Detailed Implementation

[0021] Please refer to Figures 1 to 7 As shown, it illustrates a specific embodiment of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] An integrated system for dewatering and packaging slaughterhouse waste includes a pump pit 101 (equipped with a cutting-type sewage pump), a rotary filter press 200, and a bundling and wrapping machine 300, arranged sequentially along the material processing order. These three independently functional devices are electrically connected and controlled by a PLC controller 400. While each of these three devices represents mature technology in its individual function, the system cleverly combines and utilizes existing mature equipment to create a specialized integrated system for crushing, dewatering, and packaging slaughterhouse waste, based on the specific needs of slaughterhouse waste processing. This innovative technology is suitable for various types of slaughterhouses, effectively removing residual solid pollutants from wastewater, reducing the processing burden, and minimizing odor and bacterial growth.

[0024] Specifically: In this embodiment, a cutting-type sewage pump 100 is installed in the pump pit 101 (also known as the collection pool) for crushing slaughterhouse residue. The cutting-type sewage pump, also called a cutting submersible pump or a submersible pump with a cutting blade, is a specially designed submersible pump. It adds a cutting and grinding system to a regular sewage pump, aiming to chop and pulverize solid debris into fine particles before it enters the pump chamber or passes through the impeller, thereby fundamentally preventing blockages in the pump body and subsequent pipelines. Slaughterhouse wastewater contains a large amount of feathers, bone fragments, fat, fascia, and casings. These substances, mixed together, contain both hard particles (bone fragments) and long fibers (fascia, casings), posing a significant challenge to ordinary sewage pumps, making blockages inevitable. Therefore, a cutting-type sewage pump is used as the first step in the entire system, serving both a pumping function and as a pre-treatment crusher.

[0025] like Figure 1As shown, a liquid level sensor is installed in the pump pit 101 to detect the liquid level and start / stop the pump (the PLC controller is configured to receive the signal from the liquid level sensor and control the automatic start / stop and rotation of the cutting sewage pump 100); the cutting sewage pump 100 is connected to a discharge pipe 102; the cutting sewage pump 100 includes a pump body and an impeller, and a cutting mechanism is provided on the impeller. The cutting mechanism includes multiple layers and multiple points of alloy blades distributed in the axial and radial directions of the impeller, and the angles of the blades are staggered. In existing cutting-type sewage pumps, some blades are placed outside the impeller. In this embodiment, the blades are integrated into the impeller. The bottom blade (which can also refer to the pre-cutting blade) is located near the impeller suction port and is the first to contact the flowing residue. The bottom blade is thicker and is responsible for the initial crushing of harder, larger objects (such as bone fragments and cartilage) to prevent them from directly jamming the pump shaft or impeller. The upper blade (which can refer to the fine cutting blade) is located inside or at the edge of the impeller flow channel. It is responsible for the secondary or even tertiary cutting of the material after the initial crushing to ensure that the final discharged particles are small and uniform, suitable for subsequent processing. Therefore, this layered design achieves a progressive crushing from coarse to fine, which is much more efficient than single-layer blades.

[0026] The purpose of integrating multiple blades on the impeller is to avoid "dead zones" and ensure that no large pieces of residue escape. Radial blades radiate outward from the center of the impeller along the radius, responsible for cutting objects rotating with the fluid. Axial blades are at a certain angle to the pump shaft, and even include vertical blades, which are used to break up fibrous materials (such as fascia, casings, etc.) that may be entangled on the shaft. At the same time, since the blades are not arranged in a regular symmetrical manner on the impeller, but are staggered at different heights and angles, this ensures that there are always blades colliding with and cutting the incoming material, forming an irregular but fully covered cutting network. This greatly reduces the possibility of fiber entanglement and has a good crushing effect on contaminants of various shapes.

[0027] Furthermore, the cutting edge angle of the blade typically features a chamfer or rounded edge, rather than an extremely sharp V-angle, to handle hard bone fragments. The blade is not a simple flat plate but possesses aerodynamic curves, which both assist in propelling the fluid and utilize fluid velocity to enhance cutting performance. The space around the blade is open, ensuring that residue and wastewater make uniform and sufficient contact with the blade, rather than accumulating in corners. The blade material is preferably high-hardness, high-wear-resistant alloy tool steel (such as tungsten-chromium-cobalt alloy, tungsten carbide cemented carbide, etc.), or the blade surface undergoes special treatment (e.g., using a super-hard coating such as titanium nitride (TiN) to further reduce the coefficient of friction and improve wear resistance). The blade is secured to the impeller with high-strength bolts and anti-loosening washers to ensure it does not shift or loosen under high-speed rotation and significant impact. Each blade is detachable for easy replacement. Alternatively, the entire cutting impeller can be designed as a modular component, allowing for convenient replacement of the entire unit when the blades wear down to a certain extent.

[0028] like Figure 1 and Figure 2As shown, the rotary filter press integrated machine 200 is used for solid-liquid separation and pressing dewatering of crushed residue. It has a frame 201, a screen cylinder 202 rotatably mounted on the frame 201, a backflushing pipe 208 located on the outer side of the screen cylinder 202, and a spiral pressing mechanism located inside the screen cylinder 202. The screen cylinder 202 is composed of multiple adjustable mesh plates, allowing for adjustable rotation speed and mesh spacing. The residue mixture from the discharge pipe 102 is fed into the screen cylinder 202. Preferably, a feed chute 205 is provided at one end of the screen cylinder 202, connecting the discharge pipe 102 and the screen cylinder 202, to guide the crushed residue mixture into the screen cylinder 202. The bottom of the equipment frame 201 is provided with a liquid collection tank 209 located below the screen cylinder 202, and the liquid collection tank 209 is connected to a sewage pipe; the screw pressing mechanism includes a pressing body and a screw shaft 203 located inside it and extending along the axial direction of the screen cylinder 202. The upper end of the pressing body is a filter residue inlet 204, which extends with the screen cylinder 202 at the same length. The residue intercepted on the inner wall of the screen cylinder 202 rotates with the screen cylinder 202 to the top of the screw pressing mechanism and falls into the filter residue inlet 204 by gravity. The lower end of the pressing body is a drain outlet 207. The pressed liquid falls downward into the screen cylinder 202 and then into the liquid collection tank 209. The upper part of the pressing body is connected to the outlet end of the screw shaft 203, which is connected to a slag discharge channel 206. The outer end of the slag discharge channel 206 extends obliquely upwards outside the equipment frame 201, with an inclination angle θ between 30 and 45 degrees. The outlet of the outer end of the slag discharge channel 206 is equipped with a pressure cover. Typically, the pressure cover is adjustable, for example, by hydraulic, pneumatic, or mechanical means to adjust the opening and closing degree. By adjusting the size of the outlet, the back pressure on the residue in the press can be changed, thereby controlling the final discharge dryness. The backflushing pipe 208 can be set to control the jet of high-pressure water at a time or on demand to flush the screen from the outside to the inside, washing away the residue clogging the mesh and ensuring that the screen always maintains a high water permeability.

[0029] The working principle of the rotary filter press integrated machine 200 (in order of steps) is as follows: 1. Feeding: The residue mixture after being crushed by the cutting sewage pump is pumped into the screen cylinder 202 of the rotary filter press.

[0030] 2. Filtration: The mixed liquid is temporarily stored in the screen cylinder 202. Under the action of gravity, the liquid and fine particles smaller than the screen gaps pass through the pores on the screen plate and are thrown out or filtered into the collection tank 209 below the screen cylinder 202. Then, it enters the subsequent wastewater treatment system in the plant through the sewage pipe. At this time, most of the solid pollutants in the wastewater have been removed.

[0031] 3. Retention and Conveying: Solid residues larger than the grid gaps are intercepted on the inner wall of the screen cylinder 202. As the screen cylinder 202 slowly rotates under the drive of the rotating main shaft, the intercepted residues are continuously lifted. When they reach a certain height, they fall off due to gravity and into the pre-set filter residue inlet 204 at the top of the screen cylinder 202.

[0032] 4. Screw Press Dewatering: The wet residue (still with a high moisture content) separated and collected from the screen cylinder 202 is continuously rotated in the press by the screw shaft 203. The screw blades transport the residue from the feed end to the discharge end. During this process, due to the gradual reduction in the volume of the screw cavity and the obstruction of the discharge port pressure cover, the spatial pressure on the residue increases, and the free water inside the residue is further squeezed out. It falls down into the screen cylinder 202 through the drain port 207 below the press body, and then into the collection tank 209. The moisture content of the residue is significantly reduced, changing from the initial flocculent state to a relatively dry and hard block or strip shape. It is then sent out from the slag discharge channel 206 and falls onto the feeding conveyor belt 301 of the bundled and wrapped integrated machine 300 below.

[0033] The baling and wrapping integrated machine 300 is used to bale and wrap dehydrated residue; it includes: a feeding conveyor belt 301 for receiving residue discharged from the rotary filter press integrated machine 200; a baling and pressing roller connected to the feeding conveyor belt 301 for rolling and pressing the residue into shape; and a wrapping bracket for covering the formed bales with film; a material detection sensor (e.g., photoelectric sensor or weight sensor) is provided at the inlet of the feeding conveyor belt 301 to detect the incoming material and trigger the baling process; It also includes: a PLC controller 400 (or PLC automatic control system), which is electrically connected to the cutting-type sewage pump 100, the rotary filter press 200, and the baling and wrapping machine 300; the PLC controller 400 is also connected to a liquid level sensor and an incoming material detection sensor. A solenoid valve for controlling the backwashing pipeline is installed on the backwash pipeline 208, and the PLC controller is connected to the solenoid valve. The drive motor of the screen cylinder 202 is equipped with a speed sensor, and the drive motor of the screw shaft 203 is equipped with a current or torque sensor. The PLC controller 400 is connected to the speed sensor and the current or torque sensor respectively to monitor the load and adjust operating parameters. The PLC controller 400 can dynamically adjust the feed speed of the screw press or the pressure of the outlet pressure end cap according to the signals from the current or torque sensors to maintain constant torque operation and ensure stable output dryness. The PLC controller is equipped with a touch screen interface for displaying the real-time status and alarm information of each device, and for setting process parameters. The PLC controller 400 is also connected to an audible and visual alarm to issue warnings in case of equipment malfunction or abnormality. The PLC controller 400 is also connected to a data communication module for uploading equipment operating data to a remote monitoring center or receiving remote control commands.

[0034] Furthermore, an openable pit cover is provided on the top of the pump pit 101 to make the pump pit a sealed pit. At least a portion of the pit cover is a first transparent structure, allowing observation of the interior of the pump pit 101 from the outside. On the side of the equipment frame 201, at least corresponding to the feed chute 205, screen cylinder 202, and filter residue inlet 204, a second transparent structure is provided, allowing observation of the feed chute 205, screen cylinder 202, and filter residue inlet 204 from the outside. The discharge pipe 102 is tightly connected to the rotary filter press, and the slag discharge channel 206 is tightly connected to the bundling and wrapping integrated unit.

[0035] Next, we will introduce the workflow of the entire integrated system for dehydrating and packaging slaughterhouse waste: 1. Pump pit 101 (also known as collection pool) is a temporary collection point for wastewater containing solid residue generated during the slaughtering process. A cutting-type sewage pump 100, submerged in the collection pool, crushes the residue and discharges the crushed mixture. 2. The crushed mixture discharged by the cutting sewage pump 100 first enters the feed chute 205 through the discharge pipe 102. The feed chute 205 plays a role in smoothly and evenly guiding the material into the rotary filter press integrated machine 200. 3. The mixed liquid in the feed chute 205 enters the slowly rotating screen cylinder 202. The liquid and fine particles pass through the screen gaps and are discharged to the factory's sewage treatment system through the collection tank 209 and sewage pipe, while the solid residue is trapped on the inner wall of the screen. The trapped wet residue falls into the screw press along with the rotation of the screen cylinder 202. Under the squeezing of the screw shaft and the action of the end pressure cover, the residue is strongly dehydrated. The squeezed water falls into the screen cylinder 202, and the residue is sent out from the slag discharge channel 206. 4. The residue falls onto the feeding conveyor belt 301 of the bundling and wrapping machine 300 below. The feeding conveyor belt 301 lifts the pressed dry residue to the inlet of the baling and pressing roller. The baling and pressing roller then rolls and presses the loose dry residue into a tight cylindrical bundle. The bundle is then rotated on the wrapping bracket and tightly wrapped in multiple layers of stretch film to form a completely sealed finished product.

[0036] Furthermore, a method for processing slaughter residue is provided, comprising the following steps: S1: using a cutting-type sewage pump 100 to crush the residue mixture; S2: sending the crushed mixture into a rotary filter press 200 for solid-liquid separation and pressing dehydration; S3: sending the dehydrated residue into a bundling and wrapping machine 300 for bundling and film packaging; wherein, steps S1 to S3 are automatically controlled and executed by a PLC controller 400.

[0037] like Figure 7 As shown, it should be noted that the PLC controller 400 acts as the "brain" of the entire system, directing and coordinating the entire process. Typically, the PLC controller 400 (Programmable Logic Controller) includes a central processing unit (CPU) and corresponding digital / analog input / output (DI / DO, AI / AO) modules. It is configured to receive signals from all sensors, perform calculations and judgments according to a pre-programmed control program (logic), and then issue control commands to each actuator. The PLC controller 400 can connect to all I / O modules, touchscreens, and communication modules via a backplane bus or industrial network.

[0038] The sensor detection module (input signal) is responsible for converting the state of the physical world into electrical signals and sending them to the PLC controller 400. For example: 1. A liquid level sensor installed in the water collection tank, which typically outputs a 4-20mA analog signal or a high / low level switch signal, is used to automatically start and stop the cutting-type sewage pump to prevent dry running or overflow; 2. A speed sensor, usually an encoder, is installed on the main shaft of the screen cylinder 202 motor to provide real-time speed feedback. The PLC controller 400 adjusts the motor frequency accordingly to achieve constant speed or variable speed operation; 3. A torque / current sensor is installed on the power line of the screw press motor. The motor current is proportional to the load torque. The PLC controller 400 reads the current value through the analog input module and uses it as a feedback signal for constant torque pressing control to ensure stable output dryness; 4. A photoelectric / weight sensor is installed at the feed inlet of the baler to detect whether material has arrived and trigger the automatic start of the baling process.

[0039] The execution drive module (output control) is responsible for receiving instructions from the PLC controller 400 and driving powerful electrical equipment, such as: 1. Motor driver / frequency converter: The PLC controller 400 sends start / stop commands and speed setpoints (such as 0-10V or 4-20mA signals) to the frequency converter, which then controls the smooth start, stop, and speed adjustment of the motor. The extrusion speed can also be controlled by adjusting the frequency of the screw press frequency converter; 2. Relay / contactor: This is used to control high-current circuits, such as the direct start and stop of a water pump motor. The PLC controller 400 outputs a 24V DC signal to control the relay coil to engage, thereby connecting the 380V AC contactor to drive the water pump; 3. Solenoid valve: This is used to control the on / off of the air or liquid circuit in the backwash pipeline. The PLC controller 400 outputs a switch signal, energizing the solenoid valve to open and perform high-pressure flushing.

[0040] Furthermore, as mentioned above, the touchscreen serves as a human-machine interface module, communicating with the PLC controller 400 via Ethernet or serial port. It acts as a window, displaying system flowcharts, real-time parameters (current, speed, liquid level), alarm history, and allowing operators to set target parameters (such as pressing pressure setpoints). When the PLC controller 400 detects a fault (such as motor overload, blockage, or sensor malfunction), it outputs a signal to activate an audible and visual alarm, alerting staff. Moreover, data from the PLC (equipment running time, output, energy consumption, and fault codes) can be uploaded to a remote monitoring center (cloud platform or central server) via Ethernet or a 4G wireless network. Engineers can then perform remote fault diagnosis, data analysis, and even program updates, enabling predictive maintenance and digital management.

[0041] Next, taking the automatic operation mode as an example, the electronic control workflow of the system will be introduced: 1. Sensing: The liquid level in pump pit 101 rises, and the liquid level sensor signal reaches the set value of PLC controller 400.

[0042] 2. Decision: The PLC controller 400 determines that the system needs to be started and executes the program in the preset sequence.

[0043] 3. Execution: The PLC controller 400 first starts the screen cylinder 202 and screw press of the rotary filter press 200. After a delay of several seconds, the PLC controller 400 starts the frequency converter of the cutting sewage pump 100, and the pump starts working. The residue is sent into the rotary press 200. The torque sensor provides real-time feedback data, and the PLC controller 400 dynamically adjusts the speed of the press to maintain constant torque. The dehydrated residue triggers the photoelectric sensor at the inlet of the baler 300, and the PLC controller 400 automatically starts the baling and wrapping process.

[0044] Throughout the process, the PLC controller 400 continuously monitors all parameters. Once the current of the screw press exceeds the limit (indicating blockage), the PLC controller 400 will immediately stop the feeding and reverse the direction, while triggering the touch screen alarm and the on-site audible and visual alarm.

[0045] The key design feature of this invention lies in its specialized approach to slaughterhouse waste processing. It integrates multiple processes including crushing, solid-liquid separation, pressing and dehydration, bundling, and wrapping, achieving fully automated control via a PLC system. This frees manual labor from tedious and demanding tasks, effectively reducing labor costs and reliance on operator experience. The system achieves fully automated and closed-loop processing of dirty and perishable slaughterhouse waste, transforming it into clean, stable, and easily transportable resources, thus addressing environmental, hygiene, and efficiency concerns. This integrated slaughterhouse waste dehydration and packaging system is suitable for various types of slaughterhouses, offering advantages such as high automation, labor savings, energy efficiency, environmental friendliness, resource utilization, small footprint, and stable operation, making it suitable for widespread application.

[0046] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An integrated system for dehydrating and packaging slaughterhouse residue, characterized in that, Including those set sequentially along the material handling order: A cutting-type sewage pump is installed in a pump pit and is used to crush slaughter residue; a liquid level sensor is installed in the pump pit to detect the liquid level and start and stop the pump; the cutting-type sewage pump is connected to a discharge pipe. This rotary filter press is used for solid-liquid separation and dewatering of crushed residue. It features a frame, a screen cylinder rotatably mounted on the frame, a backflushing pipe located on the outer side of the screen cylinder, and a screw pressing mechanism inside the screen cylinder. The residue mixture from the discharge pipe is fed into the screen cylinder. A collection tank located below the screen cylinder is situated at the bottom of the frame, connected to a wastewater pipe. The screw pressing mechanism includes a pressing body and a screw shaft extending axially along the screen cylinder. The upper end of the pressing body is the filter residue inlet, and the lower end is the drain outlet. A slag discharge channel is connected to the upper end of the pressing body corresponding to the outlet end of the screw shaft. The outer end of the slag discharge channel extends outside the frame, and a pressure cap is provided at the outlet end of the slag discharge channel. The baling and wrapping machine is used to bale and wrap dehydrated residue; it includes: a feeding conveyor belt for receiving residue discharged from the rotary filter press; a baling and pressing roller connected to the feeding conveyor belt for rolling and pressing the residue into shape; and a wrapping bracket for covering the formed bales with film. A material detection sensor is installed at the feed inlet of the feeding conveyor belt to detect incoming materials and trigger the packaging process; It also includes: a PLC controller, which is electrically connected to the cutting sewage pump, the rotary filter press, and the baling and wrapping machine, respectively; The PLC controller is also connected to the liquid level sensor and the incoming material detection sensor.

2. The integrated system for dehydrating and packaging slaughter residue according to claim 1, characterized in that, A feed chute is provided at one end of the screen cylinder, which connects the discharge pipe and the screen cylinder to guide the crushed residue mixture into the screen cylinder.

3. The integrated system for dehydrating and packaging slaughter residue according to claim 1, characterized in that, A solenoid valve for controlling the backflushing pipeline is installed on the backflushing pipeline, and a PLC controller is connected to the solenoid valve.

4. The integrated system for dehydrating and packaging slaughter residue according to claim 1, characterized in that, An openable pit cover is installed on the top of the pump pit to make the pump pit a sealed pit. At least part of the pit cover is a first transparent structure to allow observation of the inside of the pump pit from the outside.

5. The integrated system for dehydrating and packaging slaughter residue according to claim 2, characterized in that, On the side of the equipment frame, at least corresponding to the feed chute, screen cylinder, and filter cake inlet, a second transparent structure is provided to allow observation of the feed chute, screen cylinder, and filter cake inlet from the outside.

6. The integrated system for dehydrating and packaging slaughter residue according to claim 1, characterized in that, The discharge pipe is seamlessly connected to the rotary filter press, and the slag discharge channel is seamlessly connected to the bundling and wrapping system.

7. The integrated system for dehydrating and packaging slaughter residue according to claim 1, characterized in that, The PLC controller is also connected to a data communication module, which is used to upload equipment operation data to a remote monitoring center or receive remote control commands.

8. The integrated system for dehydrating and packaging slaughter residue according to claim 1, characterized in that, The cutting sewage pump includes a pump body and an impeller. The impeller is equipped with a cutting mechanism, which includes multiple layers and multiple points of alloy blades distributed in the axial and radial directions of the impeller, and the angles of the blades are staggered.

9. The integrated system for dehydrating and packaging slaughter residue according to claim 1, characterized in that, The drive motor of the screen cylinder is equipped with a speed sensor, and the drive motor of the screw shaft is equipped with a current or torque sensor. The PLC controller is connected to the speed sensor and the current or torque sensor respectively to monitor the load and adjust the operating parameters.

10. The integrated system for dehydrating and packaging slaughter residue according to claim 1, characterized in that, The PLC controller is equipped with a touch screen interface to display the real-time status of each device and alarm information, and to set process parameters; the PLC controller is also connected to an audible and visual alarm to issue warnings when equipment malfunctions or abnormalities occur.

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