An oily sludge feed system and control method

Abstract

This invention discloses an oily sludge feeding system and control method, including a feeding device and a control system. The feeding device includes a dry material hopper, which is positioned above the input end of a weighing and conveying device. The output end of the weighing and conveying device extends above a dry material vibrating screen, which is positioned above the input end of a belt conveyor. The output end of the belt conveyor extends above a dry material funnel. Both the thin material vibrating hopper and the dry material funnel are positioned above a primary feeding conveyor. The output end of the primary feeding conveyor is positioned above the input end of a secondary feeding conveyor, and the output end of the secondary feeding conveyor is positioned above a tertiary feeding box. The tertiary feeding box is connected to a material processor via a tertiary feeding conveyor. The control system includes a PLC control cabinet, a field controller, and a remote controller. The PLC control cabinet controls all motors of the oily sludge feeding system via the remote controller or the field controller.

Description

Technical Field

[0001] This invention relates to the field of environmental protection technology in oil and gas fields, and in particular to an oily sludge feeding system and control method. Background Technology

[0002] Oilfield oily sludge refers to the mixture of oil, water, and soil formed during the exploration, extraction, gathering, and wastewater (liquid) treatment of petroleum and natural gas (including shale gas and shale oil), as well as oil-based rock cuttings generated during drilling using oil-based mud. Based on the liquid content, oily sludge can be classified into dry and thin forms.

[0003] Currently, the feeding devices for oily sludge only have a conveying function, and the existing feeding systems can only transport dry or thin materials separately, lacking the function of simultaneously transporting dry and thin materials. Their start-stop devices are still based on simple mechanical operation, with each device operating independently, resulting in low automation and the inability to remotely monitor and maintain them. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems of existing feeding systems being unable to simultaneously transport dry and thin materials and having a low degree of automation, and to provide an oily sludge feeding system and control method.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] An oily sludge feeding system includes a feeding device and a control system;

[0007] The feeding device includes a dry material hopper, a thin material vibrating hopper, a weighing and conveying device, a dry material vibrating screen, a belt conveyor, a dry material funnel, a primary feeding conveyor, a secondary feeding conveyor, a tertiary feeding box, and a tertiary feeding conveyor. The dry material hopper is located above the input end of the weighing and conveying device, and the output end of the weighing and conveying device extends above the dry material vibrating screen. The dry material vibrating screen is located above the input end of the belt conveyor, and the output end of the belt conveyor extends above the dry material funnel. The outlets of the thin material vibrating hopper and the dry material funnel are both located above the primary feeding conveyor. The output end of the primary feeding conveyor is located above the input end of the secondary feeding conveyor, and the output end of the secondary feeding conveyor is located above the tertiary feeding box. The tertiary feeding box is connected to a material processor via the tertiary feeding conveyor.

[0008] The control system includes a PLC control cabinet, a field controller, and a remote controller. The PLC control cabinet controls all motors of the oily sludge feeding system through the remote controller or the field controller. There is an interlocking relationship between the motors. When the automatic mode is activated, the motors are interlocked with each other. When the manual mode is activated, the motors are interlocked and shut down. Each motor is independent of the others.

[0009] In this invention, both the thinner vibrating hopper and the dry material funnel are positioned above the primary feeding conveyor. The thinner material reaches the primary feeding conveyor via the thinner vibrating hopper, while the dry material reaches the primary feeding conveyor via the dry material hopper, weighing and conveying device, dry material vibrating screen, belt conveyor, and dry material funnel. The oily sludge reaching the primary feeding conveyor is then sequentially conveyed to the processor via the secondary feeding conveyor, tertiary feeding box, and tertiary feeding conveyor, thus enabling the same feeding system to simultaneously convey both dry and thin materials. Furthermore, this invention uses a control system to control all motors in the feeding system, and the control system allows for interlocking / unlocking between motors, enabling the feeding system to meet the needs of different modes. This achieves the technical effect of automatically and manually controlling the start and stop of related devices in the feeding system, while also enabling remote monitoring and maintenance, improving work efficiency and reducing the labor intensity of workers.

[0010] Preferably, the secondary feeding conveyor is equipped with an inert gas inlet pipe and an inert gas outlet pipe. The inert gas outlet pipe is equipped with a one-way valve, allowing inert gas to be introduced into the conveyor during operation. During material handling, temperatures can reach over 300°C. If oxygen carried by the material and the conveyor is not promptly removed at such high temperatures, an explosion may occur, affecting production safety. Introducing inert gas to remove oxygen from the device improves safety.

[0011] Preferably, heaters are installed around the three-stage feed hopper and the three-stage feed conveyor. These heaters preheat the material entering the three-stage feed hopper and prevent it from cooling. The three-stage feed hopper, the three-stage feed conveyor, and the heaters are all wrapped with insulating cotton. By using heaters to preheat the material and prevent it from cooling, the material's heating rate can be increased, thereby increasing the material processing speed. The insulating cotton effectively prevents heat loss.

[0012] Preferably, a temperature sensor is installed on the casing of the three-stage feeding conveyor to detect the material temperature. By installing the temperature sensor, when the material temperature exceeds the upper limit of the set temperature value, the heater stops heating and the conveying speed of the three-stage feeding conveyor is appropriately increased; when the material temperature falls below the lower limit of the set temperature value, the heater stops heating and the conveying speed of the three-stage feeding conveyor is appropriately decreased.

[0013] Preferably, anti-adhesion liners are installed on the inner walls of the thinner vibrating hopper, the dry material hopper, and the three-stage feed box, and silo wall vibrators are installed on the outer walls of the thinner vibrating hopper, the dry material hopper, and the three-stage feed box. By installing the anti-adhesion liners, the adhesion and caking of oily sludge can be prevented. The periodic operation of the silo wall vibrators can prevent uneven material flow and avoid material sticking to the inner walls.

[0014] Preferably, the anti-adhesion lining is a polyurethane board.

[0015] Preferably, the weighing and conveying device has a built-in weighing module. This module can automatically calculate the weighing weight based on the speed, flow rate, and weight of the conveyed material, and feed the data back to the remote controller. By incorporating a weighing module into the weighing and conveying device and employing weighing sensors for metering and control, quantitative transmission and overall line control are achieved. By feeding back various data to the remote controller, the material processing volume can be statistically analyzed in real time, improving the system's automation level.

[0016] Preferably, the dry material hopper discharge port is equipped with an automatic valve, which can be controlled to open / close via the PLC control cabinet. By installing an automatic valve at the dry material hopper discharge port, the discharge status of the dry material hopper can be controlled, thereby further achieving the technical effect of transporting only thinner / dry materials or simultaneously transporting both dry and thinner materials.

[0017] Preferably, a level gauge is installed inside the three-stage feed hopper. The level gauge can measure the height of the material inside the three-stage feed hopper and feed the data back to the remote controller. By installing a level gauge inside the three-stage feed hopper and connecting it to the remote controller, the amount of material inside the three-stage feed hopper can be monitored in real time, thereby controlling the discharge rate.

[0018] Preferably, the belt conveyor motor, the dry material vibrating screen motor, the weighing conveyor motor, and the thin material vibrating hopper motor can all be interlocked with the primary feed conveyor motor.

[0019] A control method for an oily sludge feeding system, comprising the aforementioned oily sludge feeding system;

[0020] Before conveying materials, the liquid content of the materials is tested. Dry materials enter the dry material hopper after passing through the crushing and screening hopper, while thin materials enter the thin material vibrating hopper through the grab bucket.

[0021] When conveying materials, the remote controller switches to remote control and automatic mode, the three-stage feeding conveyor works continuously, and the level gauge detects the material height in the three-stage feeding hopper and feeds it back to the remote controller; when the material height is lower than the minimum limit, the primary feeding conveyor and the secondary feeding conveyor start automatically to convey dry / thin materials or simultaneously; when the material height is higher than the maximum limit, the primary feeding conveyor and the secondary feeding conveyor shut down automatically, and the vibrator on the hopper wall of the three-stage feeding hopper works periodically.

[0022] During inspection and maintenance, the remote controller switches to local control and manual mode, and the motors are independent of each other, allowing maintenance personnel to turn the relevant equipment on or off on-site.

[0023] Preferably, the dry material includes general dry material and extra-dry dry material, and the thinner includes general thinner and extra-thin thinner. The general dry material and the general thinner can be conveyed separately, while the extra-dry dry material and the extra-thin thinner are conveyed simultaneously and mixed through the primary feed conveyor and the secondary feed conveyor. When the material is extra-dry, it is easy to cause the conveyor to jam and deform the conveyor structure; when the material is extra-thin, it will cause excessive energy consumption.

[0024] Preferably, when conveying dry materials, the belt conveyor motor, the dry material vibrating screen motor, and the weighing conveyor motor are all interlocked with the primary feed conveyor motor and the secondary feed conveyor motor; when conveying thin materials, the thin material vibrating hopper is interlocked with the primary feed conveyor motor and the secondary feed conveyor motor; when conveying both dry and thin materials simultaneously, the belt conveyor motor, the dry material vibrating screen motor, the weighing conveyor motor, and the thin material vibrating hopper motor are all interlocked with the primary feed conveyor motor and the secondary feed conveyor motor.

[0025] Preferably, when conveying thin material, the automatic valve of the dry material hopper discharge port is closed; when conveying dry material or simultaneously conveying dry material and thin material, the automatic valve of the dry material hopper discharge port is opened.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. In this invention, both the thin material vibrating hopper and the dry material funnel are positioned above the primary feeding conveyor. The thin material reaches the primary feeding conveyor via the thin material vibrating hopper, while the dry material reaches the primary feeding conveyor via the dry material hopper, weighing and conveying device, dry material vibrating screen, belt conveyor, and dry material funnel. The oily sludge reaching the primary feeding conveyor is then sequentially conveyed to the processor via the secondary feeding conveyor, tertiary feeding box, and tertiary feeding conveyor, thereby enabling the same feeding system to simultaneously convey both dry and thin materials. Furthermore, this invention uses a control system to control all motors in the feeding system, and the control system allows for interlocking / unlocking between motors, enabling the feeding system to meet the needs of different modes. This achieves the technical effect of automatically and manually controlling the start and stop of related devices in the feeding system, while also enabling remote monitoring and maintenance, improving work efficiency, and reducing the labor intensity of workers.

[0028] 2. This invention provides an inert gas inlet pipe and an inert gas outlet pipe, with a one-way valve installed on the outlet pipe. When the secondary feeding conveyor is in operation, inert gas is introduced into it, carrying away oxygen from the device and preventing explosions, thus improving production safety.

[0029] 3. In this invention, heaters and insulation cotton are installed around the three-stage feeding box and the three-stage feeding conveyor. The heaters are used to preheat the material entering the three-stage feeding box and prevent the material from cooling down. By setting the heaters to preheat the material and prevent the material from cooling down, the heating rate of the material is increased, thereby increasing the material processing speed. The insulation cotton can effectively prevent heat loss.

[0030] 4. This invention achieves quantitative transmission and overall line control by incorporating a weighing module into the weighing and conveying device and using weighing sensors for metering control. By feeding various data back to the remote controller, the material processing volume can be statistically analyzed in real time, thereby improving the automation level of the system.

[0031] 5. The present invention has anti-sticking lining plates installed on the inner walls of the thin material vibrating hopper, the dry material hopper, and the three-stage feeding box, which can effectively prevent materials from sticking and caking. Attached Figure Description

[0032] Figure 1 This is a plan view of an oily sludge feeding system according to the present invention.

[0033] Figure 2 This is an assembly diagram of the dry material feeding system.

[0034] Figure 3 for Figure 2 Enlarged view of part A in the middle.

[0035] Figure 4This is a motor control diagram for dry material conveying.

[0036] Figure 5 This is a diagram showing the motor control during the conveying of thinner.

[0037] Figure 6 This is a motor control diagram for simultaneous conveying of dry and wet materials.

[0038] Figure 7 This is a level signal feedback diagram.

[0039] Figure 8 This is the control diagram for the motor of the equipment silo wall vibrator.

[0040] Figure 9 This is a schematic diagram of the structure of a vibrating hopper for thinner.

[0041] Figure 10 This is a schematic diagram of the dry material hopper.

[0042] Figure 11 This is a schematic diagram of the weighing and conveying device.

[0043] Figure 12 This is a schematic diagram of the structure of a dry material vibrating screen.

[0044] Figure 13 This is a schematic diagram of a belt conveyor.

[0045] Figure 14 This is a structural diagram of a dry material hopper, a primary feed conveyor, and a secondary feed conveyor.

[0046] Figure 15 This is a schematic diagram of the structure of a three-stage feed box and a three-stage feed conveyor.

[0047] Figure 16 This is a schematic diagram illustrating the working principle of the present invention.

[0048] The markings in the diagram are: 1-Dry material hopper; 2-Weighing and conveying device; 3-Dry material vibrating screen; 4-Belt conveyor; 5-Dry material funnel; 6-Primary feeding conveyor; 7-Tertiary feeding box; 8-Tertiary feeding conveyor; 9-Dilute material vibrating hopper; 10-Level gauge; 11-Secondary feeding conveyor; 12-Inert gas inlet pipe; 13-Inert gas outlet pipe; 14-Heater; 15-Insulation cotton. Detailed Implementation

[0049] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0050] Example 1

[0051] An oily sludge feeding system, such as Figure 1-3 As shown, it includes a feeding device and a control system;

[0052] The feeding device includes a dry material hopper 1, a thin material vibrating hopper 9, a weighing and conveying device 2, a dry material vibrating screen 3, a belt conveyor 4, a dry material funnel 5, a primary feeding conveyor 6, a secondary feeding conveyor 11, a tertiary feeding box 7, and a tertiary feeding conveyor 8. The dry material hopper 1 is positioned above the input end of the weighing and conveying device 2, and the output end of the weighing and conveying device 2 extends above the dry material vibrating screen 3. The dry material vibrating screen 3 is positioned above the input end of the belt conveyor 4, and the output end of the belt conveyor 4 extends above the dry material funnel 5. The outlets of the thin material vibrating hopper 9 and the dry material funnel 5 are both positioned above the primary feeding conveyor 6. The output end of the primary feeding conveyor 6 is positioned above the input end of the secondary feeding conveyor 11, and the output end of the secondary feeding conveyor 11 is positioned above the tertiary feeding box 7. The tertiary feeding box 7 is connected to a material processor via the tertiary feeding conveyor 8. Figure 15 As shown;

[0053] To improve production safety, an inert gas inlet pipe 12 and an inert gas outlet pipe 13 are provided on the secondary feeding conveyor 11. Preferably, the inert gas inlet pipe 12 is located at the connection section between the secondary feeding conveyor 11 and the tertiary feeding box 7, and the inert gas outlet pipe 13 is located at the end of the secondary feeding conveyor 11 near the primary feeding conveyor 6. A one-way valve is installed on the inert gas outlet pipe 13. When the secondary feeding conveyor 11 is operating, an inert gas, such as nitrogen, is introduced into it. The principle is that during material processing, the temperature can reach above 300°C. If the oxygen inside the conveyor and carried by the material is not removed in time at high temperatures, an explosion may occur, affecting production safety. By introducing inert gas to remove the oxygen inside the device, the technical effect of improving production safety is achieved. Furthermore, to prevent the pyrolysis gas in the processor from escaping through the tertiary feeding conveyor 8, a certain height of material needs to be maintained in the tertiary feeding box 7.

[0054] Furthermore, heaters 14 are installed around the three-stage feed hopper 7 and the three-stage feed conveyor 8. These heaters 14 preheat the material entering the three-stage feed hopper 7 and prevent it from cooling, maintaining the material temperature at approximately 100°C. The heaters 14 can use steam heating, electric heating, or other heating methods. The three-stage feed hopper 7, the three-stage feed conveyor 8, and the heaters 14 are all wrapped with insulation cotton 15. By using the heaters 14 to preheat the material and prevent it from cooling, the material's heating rate can be increased, thereby increasing the material processing speed. The insulation cotton 15 effectively prevents heat loss. A temperature sensor is installed on the casing of the three-stage feed conveyor 8 to detect the material temperature. When the material temperature exceeds the upper limit of the set temperature value, the heaters 14 stop heating and appropriately increase the conveying speed of the three-stage feed conveyor 8; when the material temperature falls below the lower limit of the set temperature value, the heaters 14 stop heating and appropriately decrease the conveying speed of the three-stage feed conveyor 8.

[0055] Both the thinner vibrating hopper 9 and the dry material funnel 5 are positioned above the primary feed conveyor 6. Thinner is fed to the primary feed conveyor 6 via the thinner vibrating hopper 9, while dry material is fed to the primary feed conveyor 6 via the dry material hopper 1, the weighing and conveying device 2, the dry material vibrating screen 3, the belt conveyor 5, and the dry material funnel 5. The oily sludge arriving at the primary feed conveyor 6 is then sequentially conveyed to the processor via the secondary feed conveyor 11, the tertiary feed box 7, and the tertiary feed conveyor 8. Feeding into the dry material hopper 1 enables the conveying of only dry material; feeding into the thinner vibrating hopper 9 enables the conveying of only thinner material; and feeding into both the dry material hopper 1 and the thinner vibrating hopper 9 simultaneously enables the simultaneous conveying of both dry and thinner materials.

[0056] Furthermore, such as Figure 14 As shown, the dry material hopper 5 is equipped with an automatic valve at its discharge port. The opening and closing of the automatic valve can control whether the dry material falls to the primary feeding conveyor 6. By setting the automatic valve, the discharge status of the dry material can be controlled more timely and accurately, improving the automation level of the system. In order to prevent the material in the dry material hopper 5 from overflowing, a baffle is set around the dry material hopper 5.

[0057] To prevent oily sludge from sticking and caking, causing blockages and affecting the use of the device, anti-sticking lining plates are installed on the inner walls of the thinner vibrating hopper 9, the dry material hopper 1, and the three-stage feed box 7. Optionally, the lining plates are polyurethane boards. Furthermore, bin wall vibrators are installed on the outer walls of the thinner vibrating hopper 9, the dry material hopper 1, and the three-stage feed box 7. Through the periodic operation of the bin wall vibrators, it is possible to further prevent the material from falling unevenly and avoid the material from sticking to the inner walls.

[0058] Furthermore, the primary feeding conveyor 6, the secondary feeding conveyor 11, and the tertiary feeding conveyor 8 all have the ability to convey both dry and wet materials, and can be configured as a shafted spiral structure. The discharge port of the primary feeding conveyor 6 is connected to the tertiary feeding box 7 by a flange. When the conveying distance is long, it is possible to use two sections of the primary feeding conveyor 6 for segmented conveying.

[0059] Specifically, such as Figure 9 As shown, the thinner vibrating hopper 9 includes a silo wall vibrator, a vibrating screen, a thinner hopper, an inner liner, a support, a ladder, railings, etc. The thinner hopper is open and installed below the vibrating screen. The thinner hopper and the support are an integral structure with an irregular shape that is larger at the top and smaller at the bottom. It is connected to the screw conveyor housing of the thinner hopper by a rectangular flange at the bottom. The support is provided with a straight ladder and railings around its perimeter for easy observation and protection. Preferably, the height of the support is adjustable.

[0060] Specifically, such as Figure 10 As shown, the dry material hopper 1 includes a hopper wall vibrator, an inner lining plate, a support, a ladder, etc. The support is provided with a straight ladder around its perimeter for easy observation, and the height of the support is adjustable. The discharge port of the dry material hopper 1 is processed into an arc shape to speed up the discharge speed.

[0061] Specifically, such as Figure 11 As shown, the weighing and conveying device 2 includes a conveyor belt, a drive unit, a redirecting roller, a horizontal idler roller, a tensioning roller device, a machine body, a motor, a control box, etc.

[0062] Specifically, such as Figure 12 As shown, the dry material vibrating screen 3 is a bar-type vibrating screen, which consists of a vibrating screen box, vibrator, spring, support, etc. The support can be height adjusted, and it can quickly perform the function of screening materials. The screening machine and screen are arranged at an incline, and the screened material can quickly slide to the ground. The screen edge is equipped with baffles, which can effectively prevent the material from escaping from the vibrating screen.

[0063] Specifically, such as Figure 13 As shown, the belt conveyor 5 mainly consists of a conveyor belt, a drive unit, a redirecting roller, a trough idler, a tensioning roller device, a machine body, a motor, and a control box. The conveyor belt is designed in a herringbone shape to effectively prevent materials from slipping.

[0064] The control system includes a PLC control cabinet, field controllers, and a remote controller. The field controllers are placed near the feeding system equipment and are designed for explosion-proof operation. The PLC control cabinet and the remote controller are placed in a control room located at a distance from the feeding system equipment, and the remote controller is capable of remote operation and maintenance. The PLC control cabinet controls all motors in the oily sludge feeding system through the remote controller or the field controller. These motors are interlocked; in automatic mode, they are interlocked, and in manual mode, they are interlocked and shut down. Each motor operates independently. By setting up a control system to control all motors in the feeding system and enabling interlocking / unlocking between motors, the feeding system can meet the needs of different modes, achieving the technical effect of starting and stopping related devices in both automatic and manual feeding systems. Simultaneously, it allows for remote monitoring and maintenance, improving work efficiency and reducing the workload of staff.

[0065] Furthermore, such as Figure 7 As shown, a level gauge 10 is installed inside the three-stage feeding box 7. The level gauge 10 can measure the height of the material inside the three-stage feeding box 7 and feed the data back to the remote controller, thereby monitoring the amount of material inside the three-stage feeding box 7 in real time and controlling the feeding.

[0066] The motors of the belt conveyor 4, the dry material vibrating screen 3, the weighing conveyor 2, and the thin material vibrating hopper 9 can all be interlocked with the motor of the primary feed conveyor 6.

[0067] Example 2

[0068] This embodiment adds a weighing module to the existing embodiment 1. The weighing module is installed inside the weighing and conveying device 2. The weighing module uses a weighing sensor for metering and control, and implements quantitative transmission and line control. The weighing module can automatically calculate the weighing weight based on the speed, flow rate, and weight of the conveyed material, and feed the data back to the remote controller, thereby achieving the technical effect of real-time statistics of material processing volume and improving the automation level of the system.

[0069] Example 3

[0070] A control method for an oily sludge feeding system is as follows:

[0071] like Figure 16As shown, before conveying materials, the liquid content of the materials is tested using a solid content analyzer. When the liquid content is below 10%, it is considered extra dry material; when the liquid content is 10%-40%, it is considered general dry material; when the liquid content is 40%-70%, it is considered general thin material; and when the liquid content is above 70%, it is considered extra thin material. General dry material enters the dry material hopper 1 after passing through the crushing and screening hopper, while general thin material enters the thin material vibrating hopper 9 through the grab bucket. Extra dry material and extra thin material are conveyed simultaneously and stirred in the primary feed conveyor 6 and the secondary feed conveyor 11 before entering the tertiary feed box 7. When the material is extra dry material, it is easy to cause the conveyor to jam and deform the conveyor structure; when the material is extra thin material, it will cause excessive energy consumption. Therefore, the simultaneous conveying of extra dry material and extra thin material and stirring through the primary feed conveyor 6 and the secondary feed conveyor 11 can effectively solve the above problems.

[0072] When conveying general dry materials, such as Figure 4 As shown, the motors of the belt conveyor 4, the dry material vibrating screen 3, and the weighing conveyor 2 are all interlocked with the motors of the primary feed conveyor 6 and the secondary feed conveyor 11. When the primary feed conveyor 6 and the secondary feed conveyor 11 are turned on, the motors of the belt conveyor 4, the dry material vibrating screen 3, and the weighing conveyor 2 are all turned on; when the primary feed conveyor 6 and the secondary feed conveyor 11 are turned off, the motors of the belt conveyor 4, the dry material vibrating screen 3, and the weighing conveyor 2 are all turned off.

[0073] During operation, first switch the remote controller to remote control and automatic mode, close the thinner vibrating hopper 9, and continuously operate the three-stage feeding conveyor 8. The level gauge 10 detects the material height in the three-stage feeding box 7 and feeds it back to the remote controller. Figure 7 As shown; when the material height is below the minimum limit, the primary feeding conveyor 6 and the secondary feeding conveyor 11 automatically start. Due to the interlocking relationship, the motors of the belt conveyor 4, the dry material vibrating screen 3, and the weighing conveyor 2 all start, and the automatic valve of the dry material hopper 5 opens, conveying the dry material to the tertiary feeding box 7; when the material height is above the maximum limit, the primary feeding conveyor 6 and the secondary feeding conveyor 11 automatically shut down. Due to the interlocking relationship, the motors of the belt conveyor 4, the dry material vibrating screen 3, and the weighing conveyor 2 all shut down, and the automatic valve of the dry material hopper 5 closes. The vibrators of the dry material hopper 1 and the tertiary feeding box 7 operate periodically.

[0074] When conveying general thinners, such as Figure 5As shown, the motor of the thinner vibrating hopper 9 is interlocked with the motors of the primary feeding conveyor 6 and the secondary feeding conveyor 11. When the primary feeding conveyor 6 and the secondary feeding conveyor 11 are turned on, the thinner vibrating hopper 9 is turned on; when the primary feeding conveyor 6 and the secondary feeding conveyor 11 are turned off, the thinner vibrating hopper 9 is turned off.

[0075] During operation, the remote controller is first switched to remote control and automatic mode. The automatic valve of the dry material hopper 5, the belt conveyor 4, the dry material vibrating screen 3, the weighing conveyor 2, and the dry material hopper 1 are all closed. The three-stage feeding conveyor 8 works continuously. The level gauge 10 detects the material height in the three-stage feeding box 7 and feeds it back to the remote controller. When the material height is lower than the minimum limit, the primary feeding conveyor 6 and the secondary feeding conveyor 11 start automatically. Due to the interlocking relationship, the thin material vibrating hopper 9 also starts, transporting the thin material to the three-stage feeding box 7. When the material height is higher than the maximum limit, the primary feeding conveyor 6 and the secondary feeding conveyor 11 stop automatically. Due to the interlocking relationship, the thin material vibrating hopper 9 also stops. The vibrators of the thin material vibrating hopper 9 and the bin wall vibrators of the three-stage feeding box 7 both work periodically.

[0076] When conveying both dry and thin materials simultaneously, such as Figure 6 As shown, the motors of the belt conveyor 4, the dry material vibrating screen 3, the weighing conveyor 2, and the thin material vibrating hopper 9 are all interlocked with the motors of the primary feed conveyor 6 and the secondary feed conveyor 11. When the primary feed conveyor 6 is turned on, the belt conveyor 4, the dry material vibrating screen 3, the weighing conveyor 2, and the thin material vibrating hopper 9 are all turned on; when the primary feed conveyor 6 and the secondary feed conveyor 11 are turned off, the belt conveyor 4, the dry material vibrating screen 3, the weighing conveyor 2, and the thin material vibrating hopper 9 are all turned off.

[0077] During operation, the remote controller is first switched to remote control and automatic mode. The three-stage feeding conveyor 8 operates continuously, and the level gauge 10 detects the material height in the three-stage feeding hopper 7 and sends feedback to the remote controller. When the material height is below the minimum limit, the first-stage feeding conveyor 6 and the second-stage feeding conveyor 11 start automatically. Due to the interlocking relationship, the belt conveyor 4, the dry material vibrating screen 3, the weighing conveyor 2, and the thin material vibrating hopper 9 all start. The automatic valve of the dry material funnel 5 opens, and dry material and thin material are simultaneously fed... The material is fed into the primary feed conveyor 6 and the secondary feed conveyor 11 for mixing, and then conveyed to the tertiary feed hopper 7. When the material height exceeds the maximum limit, the primary feed conveyor 6 and the secondary feed conveyor 11 automatically shut down. Due to the interlocking relationship, the belt conveyor 4, the dry material vibrating screen 3, the weighing conveyor 2, and the thin material vibrating hopper 9 all shut down. The automatic valve of the dry material funnel 5 closes, and the vibrators on the walls of the tertiary feed hopper 7, the dry material hopper 1, and the thin material vibrating hopper 9 all operate periodically. Figure 8 As shown.

[0078] During inspection and maintenance, the remote controller switches to local control and manual mode, with all motors operating independently. Maintenance personnel can turn the relevant equipment on or off on-site for inspection and maintenance. Simultaneously, remote technicians can also maintain the remote controller remotely.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An oily sludge feeding system, characterized in that, The system includes a feeding device and a control system. The feeding device includes a dry material hopper (1), a thin material vibrating hopper (9), a weighing and conveying device (2), a dry material vibrating screen (3), a belt conveyor (4), a dry material funnel (5), a primary feeding conveyor (6), a secondary feeding conveyor (11), a tertiary feeding box (7), and a tertiary feeding conveyor (8). The dry material hopper (1) is located above the input end of the weighing and conveying device (2), and the output end of the weighing and conveying device (2) extends above the dry material vibrating screen (3). The dry material vibrating screen (3) is located above the input end of the belt conveyor (4), and the output end of the belt conveyor (4) extends above the dry material funnel (5). The thin material vibrating hopper (9) and the dry material funnel... (5) The discharge ports are all located above the primary feeding conveyor (6). The output end of the primary feeding conveyor (6) is located above the input end of the secondary feeding conveyor (11). The output end of the secondary feeding conveyor (11) is located above the tertiary feeding box (7). The tertiary feeding box (7) is connected to the material processor through the tertiary feeding conveyor (8). The control system includes a PLC control cabinet, a field controller and a remote controller. The PLC control cabinet controls all motors of the oily sludge feeding system through the remote controller or the field controller. There is an interlocking relationship between the motors. When the automatic mode is turned on, the motors are interlocked with each other. When the manual mode is turned on, the motors are interlocked and shut down. Each motor is independent of the others. The secondary feeding conveyor (11) is provided with an inert gas inlet pipe (12) and an inert gas outlet pipe (13). The inert gas outlet pipe (13) is provided with a one-way valve. When the secondary feeding conveyor (11) is in operation, inert gas is introduced through the inert gas inlet pipe (12).

2. The oily sludge feeding system according to claim 1, characterized in that, Heaters (14) are provided around the three-stage feed box (7) and the three-stage feed conveyor (8). The heaters (14) are used to preheat the material entering the three-stage feed box (7) and prevent the material from cooling. The three-stage feed box (7), the three-stage feed conveyor (8) and the heaters (14) are all wrapped with heat insulation cotton (15).

3. The oily sludge feeding system according to claim 1, characterized in that, The three-stage feeding conveyor (8) is equipped with a temperature sensor on its casing, which is used to detect the temperature of the material.

4. The oily sludge feeding system according to claim 1, characterized in that, Anti-adhesion lining plates are installed on the inner walls of the thin material vibrating hopper (9), the dry material hopper (1), and the three-stage feeding box (7), and bin wall vibrators are installed on the outer walls of the thin material vibrating hopper (9), the dry material hopper (1), and the three-stage feeding box (7).

5. The oily sludge feeding system according to claim 4, characterized in that, The anti-adhesion lining is made of polyurethane board.

6. The oily sludge feeding system according to claim 1, characterized in that, The weighing and conveying device (2) has a built-in weighing module, which can automatically calculate the weighing weight and feed the data back to the remote controller.

7. The oily sludge feeding system according to claim 1, characterized in that, The dry material funnel (5) is equipped with an automatic valve at its discharge port, which can be controlled to open or close via the PLC control cabinet.

8. The oily sludge feeding system according to claim 1, characterized in that, The three-stage feed box (7) is equipped with a level gauge (10), which can measure the height of the material in the three-stage feed box (7) and feed the data back to the remote controller.

9. The oily sludge feeding system according to claim 1, characterized in that, The motors of the belt conveyor (4), the dry material vibrating screen (3), the weighing conveyor (2), and the thin material vibrating hopper (9) can all be interlocked with the motors of the primary feed conveyor (6) and the secondary feed conveyor (11).

10. A control method for an oily sludge feeding system, characterized in that, The system includes an oily sludge feeding system as described in claim 8. Before conveying the material, the liquid content of the material is tested. Dry material enters the dry material hopper (1) after passing through the crushing and screening hopper, and thin material enters the thin material vibrating hopper (9) through the grab bucket. When conveying the material, the remote controller switches to remote control and automatic mode, the three-stage feeding conveyor (8) works continuously, and the level gauge (10) detects the material height in the three-stage feeding box (7) and feeds it back to the remote controller. When the material height is lower than the minimum limit, the first-stage feeding conveyor (6) and the second-stage feeding conveyor (11) start automatically to convey dry material / thin material or convey them simultaneously. When the material height is higher than the maximum limit, the first-stage feeding conveyor (6) and the second-stage feeding conveyor (11) stop automatically, and the silo wall vibrator of the three-stage feeding box (7) works periodically. During inspection and maintenance, the remote controller switches to local control and manual mode, the motors are independent of each other, and maintenance personnel can turn the relevant equipment on or off on site.

11. The control method for an oily sludge feeding system according to claim 10, characterized in that, The dry material includes general dry material and extra dry material, and the thin material includes general thin material and extra thin material. The general dry material and the general thin material can be transported separately, and the extra dry material and the extra thin material are transported simultaneously and mixed by the primary feed conveyor (6) and the secondary feed conveyor (11).

12. The control method for an oily sludge feeding system according to claim 10, characterized in that, When conveying dry materials, the motors of the belt conveyor (4), the dry material vibrating screen (3), and the weighing conveyor (2) are all interlocked with the motors of the primary feed conveyor (6) and the secondary feed conveyor (11). When conveying thin materials, the motor of the thin material vibrating hopper (9) is interlocked with the motors of the primary feed conveyor (6) and the secondary feed conveyor (11). When conveying both dry and thin materials, the motors of the belt conveyor (4), the dry material vibrating screen (3), the weighing conveyor (2), and the thin material vibrating hopper (9) are all interlocked with the motors of the primary feed conveyor (6) and the secondary feed conveyor (11).

13. The control method for an oily sludge feeding system according to claim 10, characterized in that, When conveying thin material, the automatic valve of the discharge port of the dry material funnel (5) is closed; when conveying dry material or conveying both dry material and thin material at the same time, the automatic valve of the discharge port of the dry material funnel (5) is opened.

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