Continuous oil sludge suction conveying method and system and oil sludge transfer vehicle

Abstract

The invention discloses a continuous oil sludge suction and conveying method and system and an oil sludge transfer vehicle, and belongs to the technical field of waste mud cleaning and transfer, the system comprises a multi-cavity tank, the interior of a tank body of the multi-cavity tank is divided into at least two cavities, each cavity is internally provided with a liquid level detection sensor, and the liquid level detection sensors are connected with the liquid level detection sensors. A feeding gate valve and a discharging gate valve are respectively arranged at the feeding hole and the discharging hole of each cavity; the plurality of feeding holes are connected in parallel and then are connected with a suction pipe; the vacuum suction device is communicated with each cavity through a multi-channel electric ball valve; and the control module is configured to control the multi-channel electric ball valve to conduct the cavity with the liquid level data lower than a preset value according to the liquid level data, collected by the liquid level detection sensor, of the oil sludge in the cavity, so that negative pressure is formed in the cavity, and the feeding gate valve of the cavity and the discharging gate valves of the other cavities are opened. Automatic switching of oil sludge suction and discharge operation can be achieved, continuous operation of transferring is achieved, and the oil sludge suction and discharge efficiency and the transferring speed are effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste sludge cleaning and transportation, and in particular relates to a continuous sludge suction and transportation method, a system and a sludge transportation vehicle. Background Art

[0002] Oil and gas drilling and workover operations generate large amounts of waste mud, which is temporarily stored in mud pits or tanks at the construction site. Sludge forms due to sedimentation. Sludge is a complex composition of rock debris, heavy metals, clay, oil, and chemical treatment agents. Once released into the surrounding environment, it can have immeasurable negative impacts on soil and water sources. Therefore, sludge must be transported to designated locations for treatment. Environmental protection requirements require that the mud not fall to the ground during transport. Furthermore, sludge is highly viscous, easily hardened, and corrosive, and it emits toxic, hazardous, flammable, and explosive gases, making it difficult to clean, store, and transport.

[0003] Currently, oil sludge is mainly transported by personnel entering a mud pool or mud tank, using a hopper to lift or a mud pump to transfer the oil sludge to a transfer vehicle, which then transports the oil sludge to a designated location for processing. The existing transfer method is prone to oil sludge spillage during the lifting process. Due to the viscous nature of oil sludge, the mud pump's operation efficiency is low. Oil sludge is also corrosive and is accompanied by the emission of toxic and harmful gases, seriously endangering the health and life safety of workers. In addition, due to the limited number of oil sludge transfer equipment, the existing technology can only meet the requirements of an intermittent suction and discharge mode of operation. After the tank is fully sucked, it is discharged, and continuous suction and discharge cannot be achieved, resulting in low overall operation efficiency.

[0004] Therefore, how to overcome the inefficient operation caused by the intermittent suction and exhaust mode of alternating suction and exhaust is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the existing technology and provide a continuous sludge suction and transportation method, system and sludge transfer vehicle, which can realize automatic switching of sludge suction and discharge operations, realize uninterrupted and continuous transfer operations, and effectively improve the sludge suction and discharge efficiency and transfer speed.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] In a first aspect, the present invention provides a continuous oil sludge suction and conveying system, comprising:

[0008] A multi-cavity tank body, wherein the tank body of the multi-cavity tank body is divided into at least two cavities, wherein each cavity is provided with a liquid level detection sensor, and a feed gate valve and a discharge gate valve are provided at the feed port and discharge port of each cavity respectively, and several feed ports are connected in parallel to the suction pipe;

[0009] The vacuum suction device is connected to each cavity through a multi-channel electric ball valve;

[0010] The control module is configured to control the multi-channel electric ball valve to conduct the cavity whose liquid level data is lower than the preset value based on the oil sludge liquid level data in the cavity collected by the liquid level detection sensor, so as to form a negative pressure inside the cavity, open the feed gate valve of the cavity and the discharge gate valves of the remaining cavities, so that each cavity forms alternating oil sludge suction and oil sludge discharge, so as to realize continuous oil sludge suction of the multi-cavity tank.

[0011] A partition is vertically arranged inside the tank body to separate it into a first cavity and a second cavity;

[0012] Wherein, a stirring device is respectively provided in the first cavity and the second cavity;

[0013] The main feed port is located at the upper part of the first cavity and the second cavity, and the discharge port is located at the lower part of the first cavity and the second cavity;

[0014] Pressure relief valves are also provided on the upper parts of the first cavity and the second cavity.

[0015] The tank body is provided with an upper cover, an opening oil cylinder for driving the upper cover to turn over, and a locking oil cylinder for fixing the upper cover.

[0016] The vacuum suction device includes an air intake pipe;

[0017] The multi-channel electric ball valve is a three-way ball valve;

[0018] Among them, one end of the air intake pipe is connected to the Roots blower, and the other end is connected to one end of the first air intake pipe and the second air intake pipe respectively through the three-way ball valve, and the other ends of the first air intake pipe and the second air intake pipe are connected to the first cavity and the second cavity respectively.

[0019] A dust removal device is provided between the Roots blower and the air inlet duct, and a pneumatic wafer butterfly valve is provided on the air inlet duct.

[0020] In a second aspect, the present invention provides an oil sludge transfer vehicle, comprising:

[0021] vehicle chassis;

[0022] The vehicle chassis is equipped with the continuous sludge suction and conveying system.

[0023] The vehicle chassis is provided with a reel device and a lifting mechanism;

[0024] Wherein, the reel device is used to reel up the suction tube, and the lifting mechanism is used to lift the multi-chamber tank body.

[0025] An auxiliary engine is provided on the vehicle chassis;

[0026] The auxiliary engine drives the Roots blower in the vacuum suction device to work through the transmission device;

[0027] The transmission device includes a power output assembly, two pulleys and a conveyor belt;

[0028] Wherein, the power output assembly is connected to the auxiliary engine, the two pulleys are respectively connected to the power output shaft of the power output assembly and the power input shaft of the Roots blower, and the transmission is transmitted between the two pulleys through the conveyor belt.

[0029] The lifting mechanism includes a subframe;

[0030] The auxiliary frame is provided with a parallel four-bar mechanism and a safety support mechanism;

[0031] Wherein, the parallel four-bar mechanism and the safety support mechanism are connected to the multi-cavity tank body; and

[0032] The auxiliary frame is provided with a lifting cylinder for driving the parallel four-bar mechanism to move.

[0033] In a third aspect, the present invention provides a continuous oil sludge suction and transportation method, comprising:

[0034] Controlling at least two cavities to form alternating suction, which includes:

[0035] Select at least one cavity pumping operation, i.e.

[0036] The control module controls the multi-channel electric ball valve (24) to switch to the air inlet line corresponding to the corresponding cavity, controls the pressure relief valve (77) corresponding to the cavity to close, the feed gate valve (78) to open, and the discharge gate valve (74) to close; and,

[0037] Control at least one other cavity discharge operation, i.e.

[0038] The control module controls the pressure relief valve (77) corresponding to the cavity to open, the feed gate valve (78) to close, and the discharge gate valve (74) to open;

[0039] Furthermore, when the cavity is in suction operation, when its corresponding liquid level detection sensor (79) detects that the liquid level reaches a preset value, the control module controls the cavity in suction operation to start discharge operation and the cavity in discharge operation to start suction operation, so as to form alternating suction operation and discharge operation between each cavity.

[0040] The beneficial effects of the present invention are as follows: the present invention provides a continuous sludge suction and conveying system and a working method thereof, which ensures that the sludge transfer process does not require personnel to enter the sludge pool or sludge tank to perform operations. During the suction and discharge processes, the sludge flows in closed pipes and tanks without contact with the outside world, and there will be no sludge spilling or toxic and harmful gas emission. Through the intelligent multi-cavity tank design, automatic switching of sludge suction and discharge operations is achieved, and uninterrupted and continuous transfer operations are achieved, effectively improving the sludge suction and discharge efficiency and increasing the sludge transfer speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic structural diagram of at least one continuous oil sludge suction and transportation system provided in this embodiment;

[0042] Figure 2 and Figure 3 Schematic diagrams of the structure of the multi-cavity tank provided in this embodiment in two different directions;

[0043] Figure 4 A schematic structural diagram of the vacuum suction device provided in this embodiment;

[0044] Figure 5 A schematic diagram of the switching process of the three-way ball valve provided in this embodiment;

[0045] The reference numerals in the figure are as follows: 1-vehicle chassis; 2-vacuum suction device; 3-transmission device; 4-auxiliary engine; 5-reel device; 6-lifting mechanism; 7-multi-cavity tank body; 21-dust removal device; 22-pneumatic clamp butterfly valve; 23-intake pipe; 24-multi-channel electric ball valve; 25-first intake pipe; 26-second intake pipe; 71-partition; 72-tank body; 73-opening cylinder; 74-discharge gate valve; 75-discharge port; 76-stirring device; 77-pressure relief valve; 78-feed gate valve; 79-liquid level detection device; 710-upper cover; 711-locking cylinder; 712-feed port. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0047] like Figures 2 to 4As shown, this embodiment discloses a continuous oil sludge suction and conveying system, which mainly includes a multi-chamber tank body 7, a vacuum suction device 2, and a control module. The multi-chamber tank body 7 is an important component of the oil sludge suction, discharge and transportation system, and is primarily responsible for the temporary storage and transportation of oil sludge. A top cover 710 is provided on the tank body 72. The tank body 72 is also equipped with a cover-opening cylinder 73 for turning the top cover 710, and a locking cylinder 711 for securing the top cover 710. The tank body 72 of the multi-chamber tank body 7 is divided into at least two chambers. In some embodiments, the tank body 72 is divided into a first chamber and a second chamber by a vertical partition 71. Liquid level detection sensors 79 are provided in both the first and second chambers, and a feed gate valve 78 and a discharge gate valve 74 are provided at the main feed port 712 and discharge port 75 of each chamber, respectively. The two feed ports 712 are connected in parallel to the suction pipe. The feed port 712 is located at the upper portion of the first cavity and the second cavity, and the discharge port 75 is located at the lower portion of the first cavity and the second cavity.

[0048] In some embodiments, a stirring device 76 is provided in each of the first and second cavities for stirring the sludge during discharge, facilitating discharge. A pressure relief valve 77 is connected to the upper portions of the first and second cavities and is opened during discharge to facilitate discharge.

[0049] In some embodiments, the vacuum suction device 2 is connected to each cavity through a multi-channel electric ball valve 24. Figure 4 As shown, the vacuum suction device 2 includes an air intake pipe 23, on which a pneumatic clamping butterfly valve 22 is provided. A dust removal device 21 is provided between the Roots blower and the air intake pipe 23. One end of the air intake pipe 23 is connected to the Roots blower, and the other end is connected to one end of the first air intake pipe 25 and the second air intake pipe 26 respectively through a multi-channel electric ball valve 24. In some embodiments, the multi-channel electric ball valve 24 is selected as a three-way ball valve. The other ends of the first air intake pipe 25 and the second air intake pipe 26 are respectively connected to the upper parts of the two first cavities and the second cavity. When the Roots blower works, a vacuum negative pressure is formed in the cavity, and a vacuum is generated at the suction pipe mouth.

[0050] In some embodiments, a control module is specifically provided. A liquid level detection sensor 79 is connected to the signal input of the control system, and the signal output of the control system is electrically connected to the control switches of the three-way ball valve 24, the pressure relief valve 77, the feed gate valve 78, the discharge gate valve 74, and the stirring device 76. The control system utilizes circuit control and the coordinated action of pneumatic components to automatically suction and discharge oil sludge from the tank, achieving uninterrupted and continuous transfer operation and improving oil sludge suction and discharge efficiency. The control module is configured to control the multi-channel electric ball valve 24 to open the cavity where the liquid level data is below a preset value based on the oil sludge level data within the cavity collected by the liquid level detection sensor, thereby creating a negative pressure within the cavity. This opens the feed gate valve 78 of the cavity and the discharge gate valves 74 of the remaining cavities, thereby achieving alternating suction in each cavity.

[0051] In at least one embodiment, Figure 1 As shown, a sludge transfer vehicle equipped with the aforementioned continuous sludge suction and conveying system is disclosed. The sludge transfer vehicle comprises a vehicle chassis 1, equipped with a vacuum suction device 2, a reel 5, and a lifting mechanism 6. The reel 5 is used to reel in the suction tube, and the lifting mechanism 6 is equipped with a multi-chamber tank 7. The vehicle chassis 1 is used to carry and transport the entire suction and conveying system of the present invention. It is equipped with a high-power, high-performance chassis specifically designed for oilfields, offering enhanced escape capabilities, load-bearing capacity, air intake system, frame, and front and rear axle load-bearing performance, ensuring greater reliability and meeting field driving requirements.

[0052] As an optional embodiment of the reel device 5, the reel device 5 includes a reel bracket, which is driven by a reel retracting cylinder. The reel bracket is used to wind the suction hose. The suction hose is available in two sizes, DN150 and DN100, to accommodate different operating conditions. Automatically rewinding the suction hose via the cylinder is simple, reliable, and improves efficiency.

[0053] As an optional embodiment of the lifting mechanism 6, the lifting mechanism 6 includes a subframe connected to the vehicle chassis 1 via a connecting plate and U-bolts. The subframe is equipped with a parallelogram linkage and a safety support mechanism, which are connected to the multi-chamber tank 7. The subframe is equipped with a lifting cylinder that drives the parallelogram linkage. The lifting mechanism 6 is used to raise and lower the multi-chamber tank 7. Once the equipment arrives on site, the tank discharge port 75 is lifted upward to facilitate the discharge of sludge onto the transfer vehicle.

[0054] In some embodiments, a secondary engine 4 is provided on the vehicle chassis 1. The secondary engine 4 drives the Roots blower via a transmission 3. The transmission 3 includes a power output assembly, two pulleys, and a conveyor belt. The power output assembly is connected to the secondary engine 4. The two pulleys are respectively connected to the power output shaft of the power output assembly and the power input shaft of the Roots blower. The conveyor belt is used to transmit power between the two pulleys. The present invention transmits power from the secondary engine 4 to the Roots blower via the power output assembly. The power output assembly can achieve power engagement and disengagement at any time through gas-liquid control. When transmitting high torque, the belt drive may slip, thereby protecting the engine. A high-speed airflow is formed nearby, and the highly fluid sludge is negatively suctioned into the tank body.

[0055] This embodiment features a multi-cavity tank. Based on feedback from a liquid level sensor, the intelligent control system automatically opens and closes the feed and discharge gate valves. Oil sludge is continuously pumped from the tank into both sides of the multi-cavity tank for transfer, enabling automatic switching between sludge suction and discharge operations, ensuring uninterrupted and continuous transfer. This not only provides stable performance but also significantly improves suction efficiency. The entire switching process is accomplished through automatic detection and control, requiring no human intervention. By switching between suction and discharge processes within the multi-cavity tank, continuous sludge transfer is achieved. A stirring device is also included to prevent material from accumulating at the discharge port, which could cause discharge difficulties.

[0056] In at least one embodiment, Figure 5 As shown, it discloses a continuous sludge suction and transportation method, comprising the following steps:

[0057] Start the auxiliary engine, which drives the Roots blower through the transmission device.

[0058] The first cavity is suctioned and the second cavity is discharged. The control module controls the three-way ball valve 24 to switch to the connection with the first air inlet pipe 25, controls the pressure relief valve 77 corresponding to the first cavity to be closed, the feed gate valve 78 to be opened, the discharge gate valve 74 to be closed, and the stirring device 76 to be closed. At this time, the first cavity is under negative pressure, and the suction pipe starts to suck the sludge; and controls the pressure relief valve 77 corresponding to the second cavity to be opened, the feed gate valve 78 to be closed, the discharge gate valve 74 to be opened, and the stirring device 76 to be opened. At this time, the internal negative pressure in the second cavity is cancelled due to the opening of the pressure relief valve 77, and the sludge is discharged through the discharge port 75.

[0059] When the liquid level detection device 79 in the first cavity detects that the liquid level in the first cavity reaches the preset value, the first cavity discharge operation and the second cavity suction operation are performed, and the control module controls the three-way ball valve 24 to switch to connect with the second air inlet pipe 26, and at the same time controls the pressure relief valve 77 corresponding to the first cavity to open, the feed gate valve 78 to close, the discharge gate valve 74 to open, and the stirring device 76 to open. At this time, due to the opening of the pressure relief valve 77 in the first cavity, the internal negative pressure is cancelled, and the sludge is discharged through the discharge port 75; and controls the pressure relief valve 77 corresponding to the second cavity to close, the feed gate valve 78 to open, the discharge gate valve 74 to close, and the stirring device 76 to close. At this time, the second cavity is under negative pressure, and the suction pipe starts to suck the sludge.

[0060] When the liquid level detection device 79 in the second cavity detects that the liquid level in the second cavity reaches a preset value, the above step 2 is repeated to perform the first cavity suction operation and the second cavity discharge operation.

[0061] By setting the above steps, the present invention realizes that when the first cavity is pumping, the second cavity is discharging, and when the first cavity is discharging, the second cavity is pumping, thereby realizing continuous sludge suction and transportation.

[0062] The multi-cavity tank design of the present invention starts the auxiliary engine through remote operation of the control system, drives the transmission device and the vacuum suction device, and automatically opens and closes the feed and discharge gate valves according to the feedback signal of the liquid level detection sensor. The sludge is continuously pumped from the pool into both sides of the multi-cavity tank for transportation, realizing automatic switching of sludge suction and discharge operations, achieving uninterrupted and continuous transportation operation, not only with stable performance and significantly improved suction efficiency; this system solves the problems faced by customers during operation such as low operating efficiency and harmful gas emissions that endanger the health of operators, while also effectively improving the quality of the ecological environment and improving product performance.

[0063] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A continuous oil sludge suction and conveying system, characterized by: include: A multi-cavity tank body (7), wherein the tank body (72) of the multi-cavity tank body (7) is divided into at least two cavities, wherein each cavity is provided with a liquid level detection sensor (79), and a feed gate valve (78) and a discharge gate valve (74) are provided at the feed port (712) and the discharge port (75) of each cavity, respectively, and a plurality of feed ports (712) are connected in parallel to a suction pipe; A vacuum suction device (2) is connected to each cavity via a multi-channel electric ball valve (24); The control module is configured to control the multi-channel electric ball valve (24) to conduct the cavity whose liquid level data is lower than a preset value based on the oil sludge liquid level data in the cavity collected by the liquid level detection sensor (79), so that a negative pressure is formed inside the cavity, open the feed gate valve (78) of the cavity and the discharge gate valves (74) of the remaining cavities, so that each cavity forms alternating oil sludge suction and oil sludge discharge, thereby realizing continuous oil sludge suction of the multi-cavity tank body (7).

2. The continuous oil sludge suction and conveying system according to claim 1, characterized in that: A partition (71) is vertically provided inside the tank body (72) to separate the tank body into a first cavity and a second cavity; Wherein, a stirring device (76) is provided in each of the first cavity and the second cavity; and The upper parts of the first cavity and the second cavity are also connected with a pressure relief valve (77).

3. The continuous oil sludge suction and conveying system according to claim 1, characterized in that: The tank body (72) is provided with an upper cover (710), a cover-opening oil cylinder (73) for driving the upper cover (710) to flip, and a locking oil cylinder (711) for fixing the upper cover (710).

4. The continuous oil sludge suction and conveying system according to claim 2, characterized in that: The vacuum suction device (2) includes an air intake pipe (23); The multi-channel electric ball valve (24) is a three-way ball valve; One end of the air intake pipe (23) is connected to the Roots blower, and the other end is connected to one end of the first air intake pipe (25) and the second air intake pipe (26) respectively through the three-way ball valve, and the other ends of the first air intake pipe (25) and the second air intake pipe (26) are connected to the first cavity and the second cavity respectively.

5. The continuous oil sludge suction and conveying system according to claim 4, characterized in that: A dust removal device (21) is provided between the Roots blower and the air inlet duct (23); and A pneumatic wafer butterfly valve (22) is provided on the air inlet pipe (23).

6. An oil sludge transport vehicle, characterized in that: include: Vehicle chassis (1); The vehicle chassis (1) is equipped with the continuous sludge suction and conveying system according to any one of claims 1 to 5.

7. The oil sludge transfer vehicle according to claim 6, characterized in that: The vehicle chassis (1) is provided with a reel device (5) and a lifting mechanism (6); The reel device (5) is used to reel in the suction tube, and the lifting mechanism (6) is used to lift the multi-chamber tank body (7).

8. The oil sludge transfer vehicle according to claim 7, characterized in that: An auxiliary engine (4) is provided on the vehicle chassis (1); The auxiliary engine (4) drives the Roots blower in the vacuum suction device (2) to operate through the transmission device (3); The transmission device (3) includes a power output assembly, two pulleys and a conveyor belt; wherein the power output assembly is connected to the auxiliary engine (4), the two pulleys are respectively connected to the power output shaft of the power output assembly and the power input shaft of the Roots blower, and the transmission is transmitted between the two pulleys through the conveyor belt.

9. The oil sludge transfer vehicle according to claim 7, characterized in that: The lifting mechanism (6) includes a subframe; The auxiliary frame is provided with a parallel four-bar mechanism and a safety support mechanism; Wherein, the parallel four-bar mechanism and the safety support mechanism are connected to the multi-cavity tank body (7); and The auxiliary frame is provided with a lifting cylinder for driving the parallel four-bar mechanism to move.

10. A continuous oil sludge suction and transportation method, characterized in that: include: Controlling at least two cavities to form alternating suction, which includes: Select at least one cavity pumping operation, i.e. The control module controls the multi-channel electric ball valve (24) to switch to the air inlet line corresponding to the corresponding cavity, controls the pressure relief valve (77) corresponding to the cavity to close, the feed gate valve (78) to open, and the discharge gate valve (74) to close; and, Control at least one other cavity discharge operation, i.e. The control module controls the pressure relief valve (77) corresponding to the cavity to open, the feed gate valve (78) to close, and the discharge gate valve (74) to open; Furthermore, when the cavity is in suction operation, when its corresponding liquid level detection sensor (79) detects that the liquid level reaches a preset value, the control module controls the cavity in the suction operation to start the discharge operation and the cavity in the discharge operation to start the suction operation, so as to form alternating discharge operation and suction operation.

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