A marine disposal apparatus for offshore drilling waste

Abstract

The application provides a marine treatment device for offshore drilling waste, relates to the technical field of environmental protection equipment, and solves the technical problem that offshore drilling waste needs to be transported to land for treatment. The device comprises a water-based drilling waste treatment system, an oil-based drilling waste treatment system, a central control room, and a deck ship water-based drilling waste treatment system, an oil-based drilling waste treatment system and a central control room are arranged on the deck ship. The marine treatment device for offshore drilling waste provided by the application can complete the treatment of offshore drilling waste at sea, thereby solving the problem that offshore drilling waste can only be transported to land for treatment at present.

Description

Technical Field

[0001] This invention relates to the field of environmental protection equipment technology, and in particular to an offshore treatment device for offshore drilling waste. Background Technology

[0002] During offshore oil exploration and extraction, various types of drilling waste are generated, mainly including oily wastewater, drilling cuttings (including oil-based and water-based mud), and domestic and industrial waste. Regulations stipulate that oily wastewater and oily mixtures from offshore oil drilling vessels, drilling platforms, and production platforms must be treated and meet standards before discharge. However, current methods for handling offshore drilling waste typically involve transporting the waste inland for processing, which is costly, time-consuming, and carries the risk of leakage during transportation. Summary of the Invention

[0003] The purpose of this invention is to provide an offshore treatment device for marine drilling waste, solving the technical problem of needing to transport marine drilling waste to land for treatment. The various technical effects of the preferred technical solutions provided by this invention are detailed below.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] The present invention provides an offshore treatment device for offshore drilling waste, comprising:

[0006] The water-based drilling waste treatment system consists of an open receiving tank, a temporary storage tank, a multi-functional integrated tank, a feeding tank, a plate and frame filter press, a first conical buffer tank, and a first briquetting machine connected in sequence. The liquid phase outlet of the plate and frame filter press is connected to the filtrate receiving tank.

[0007] The oil-based drilling waste treatment system consists of a conical receiving tank, a cuttings dryer, a thermal desorption rotary kiln, a spiral humidifier, a second conical buffer tank, and a second briquetting machine connected in sequence. The liquid phase outlet of the thermal desorption rotary kiln is connected to an oil-water separator, and the oil-water separator is connected to a water treatment device.

[0008] The central control room is used to connect to and control the water-based drilling waste treatment system and the oil-based drilling waste treatment system;

[0009] The deck vessel, wherein the water-based drilling waste treatment system, the oil-based drilling waste treatment system, and the central control room are all located on the deck of the deck vessel.

[0010] Preferably, the temporary storage tanks are two backup devices, each of which is connected at one end to the open receiving tank and at the other end to the multi-functional integrated tank; the processing module consisting of the plate and frame filter press, the first conical buffer tank, the first briquetting machine and the filtrate receiving tank is two, and the two processing modules are either backups of each other or can be used simultaneously.

[0011] Preferably, the multifunctional integrated tank is provided with a dosing chamber and a flocculation chamber. The flocculation chamber is connected to the temporary storage tank. The dosing chamber is used to prepare chemicals for treating water-based drilling waste and to transport the prepared chemicals to the flocculation chamber.

[0012] Preferably, the thermal desorption rotary kiln includes a desorption chamber, a spray tower, a non-condensable gas demister, and a non-condensable gas combustion furnace. The desorption chamber is connected to the rock cutting dryer. The non-condensable gas combustion furnace and the non-condensable gas demister are located at the top of the desorption chamber. The non-condensable gas combustion furnace is connected to the desorption chamber through the non-condensable gas demister. The spray tower is located at the top of the tail end of the desorption chamber and is used to cool the high-temperature pyrolysis gas.

[0013] Preferably, the oil-water separator is provided with an oil-water separation chamber and a crude oil storage chamber. An oil skimming device is provided in the oil-water separation chamber to skim the oil layer into the crude oil storage chamber. The oil-water separation chamber is connected to the oily wastewater outlet of the spray tower. The crude oil storage chamber is connected to the oil-water separation chamber through an oil guide channel. A heating coil is provided on the oil-water separator. The water inlet and outlet of the heating coil are respectively connected to the hot water outlet and cold water return outlet of the non-condensable gas combustion furnace.

[0014] Preferably, the spiral humidifier includes a spiral conveyor and spray nozzles. The spray nozzles are disposed on the spiral conveyor and spray water to humidify and cool the high-temperature material from the thermal desorption rotary kiln conveyed in the spiral conveyor.

[0015] Preferably, the system also includes a raised platform, on which both the open receiving tank and the conical receiving tank are disposed, and below the raised platform, the temporary storage tank and the rock cuttings dryer are disposed.

[0016] Preferably, the system further includes a first sand pump, wherein there are two first sand pumps connected in parallel between the open receiving tank and the temporary storage tank, and each end of the first sand pump is provided with an electromagnetic butterfly valve.

[0017] Preferably, the temporary storage tank is equipped with a mud mixer and a second sand pump. There are two second sand pumps connected in parallel between the temporary storage tank and the multi-functional integrated tank. Both ends of the second sand pump are equipped with electromagnetic butterfly valves.

[0018] Preferably, the conical receiving tank is provided with two interconnected conical waste collection bins, each of which is equipped with an electric gate valve at its bottom, and a steel grating is provided above the two conical waste collection bins.

[0019] The application employs the above technical solution and has at least the following beneficial effects:

[0020] The water-based drilling waste treatment system consists of an open receiving tank, a temporary storage tank, a multi-functional integrated tank, a feeding tank, a plate and frame filter press, a first conical buffer tank, and a first briquetting machine connected in sequence. The liquid phase outlet of the plate and frame filter press is connected to the filtrate receiving tank.

[0021] The oil-based drilling waste treatment system consists of a conical receiving tank, a cuttings dryer, a thermal desorption rotary kiln, a spiral humidifier, a second conical buffer tank, and a second briquetting machine connected in sequence. The liquid phase outlet of the thermal desorption rotary kiln is connected to an oil-water separator, and the oil-water separator is connected to a water treatment device.

[0022] The central control room is used to connect to and control the water-based drilling waste treatment system and the oil-based drilling waste treatment system;

[0023] The deck vessel, wherein the water-based drilling waste treatment system, the oil-based drilling waste treatment system, and the central control room are all located on the deck of the deck vessel.

[0024] This application proposes to install a water-based drilling waste treatment system, an oil-based drilling waste treatment system, and a central control room on a deck ship to achieve the purpose of treating offshore drilling waste at sea, thereby solving the current problem that offshore drilling waste can only be transported to land for treatment.

[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural schematic diagram of an offshore treatment device for offshore drilling waste provided in an embodiment of the present invention;

[0028] Figure 2 This is a top view schematic diagram of the offshore treatment equipment for offshore drilling waste provided in an embodiment of the present invention;

[0029] Figure 3 This is a top view of the offshore treatment equipment for offshore drilling waste provided in an embodiment of the present invention after removing part of the structure;

[0030] Figure 4 This is a three-dimensional structural diagram of the offshore treatment equipment for offshore drilling waste provided in an embodiment of the present invention after removing part of the structure;

[0031] Figure 5 This is a process flow diagram of an offshore treatment equipment for offshore drilling waste provided in an embodiment of the present invention;

[0032] Figure 6 This is a three-dimensional structural schematic diagram of the conical receiving tank provided in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the three-dimensional structure of the thermal desorption rotary kiln provided in an embodiment of the present invention;

[0034] Figure 8 This is a process flow diagram of the thermal desorption rotary kiln provided in an embodiment of the present invention.

[0035] In the diagram: 1. Open receiving tank; 2. Temporary storage tank; 3. Multifunctional integrated tank; 4. Feeding tank; 5. Plate and frame filter press; 6. First conical buffer tank; 7. First briquetting machine; 8. Filtrate receiving tank; 9. Conical receiving tank; 10. Rock cuttings dryer; 11. Thermal desorption rotary kiln; 12. Spiral humidifier; 13. Second conical buffer tank; 14. Second briquetting machine; 15. Oil-water separator; 16. Water treatment device; 17. Central control room; 18. Deck ship; 19. Desorption chamber; 20. Spray tower; 21. Non-condensable gas demister; 22. Non-condensable gas combustion furnace; 23. Elevated platform; 24. Electric gate valve; 25. Steel grating; 26. Feeding belt conveyor; 27. Horizontal screw conveyor; 28. Connecting trough. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0037] A specific embodiment of the present invention provides an offshore treatment device for offshore drilling waste, including a water-based drilling waste treatment system, an oil-based drilling waste treatment system, a central control room 17, and a deck vessel 18. The water-based drilling waste treatment system is used to treat water-based offshore drilling waste, and the oil-based drilling waste treatment system is used to treat oil-based offshore drilling waste. The deck vessel 18 is used to carry the water-based drilling waste treatment system and the oil-based drilling waste treatment system, so as to achieve the purpose of offshore drilling waste treatment and ultimately solve the problem that currently offshore drilling waste can only be transported to land for treatment.

[0038] Specifically, the water-based drilling waste treatment system in this application includes an open receiving tank 1, a temporary storage tank 2, a multi-functional integrated tank 3, a feeding tank 4, a plate and frame filter press 5, a first conical buffer tank 6, a first briquetting machine 7, and a filtrate receiving tank 8, in conjunction with the appendix. Figure 1 - Appendix Figure 4 As shown, the open receiving tank 1, the temporary storage tank 2, the multi-functional integrated tank 3, the feeding tank 4, the plate and frame filter press 5, the first conical buffer tank 6 and the first briquetting machine 7 are connected in sequence, and the filtrate receiving tank 8 is connected to the liquid phase outlet of the plate and frame filter press 5.

[0039] The specific oil-based drilling waste treatment system in this application includes a conical receiving tank 9, a cuttings dryer 10, a thermal desorption rotary kiln 11, a spiral humidifier 12, a second conical buffer tank 13, a second briquetting machine 14, an oil-water separator 15, and a water treatment device 16, in conjunction with the appendix. Figure 1 - Appendix Figure 4 As shown, the conical receiving tank 9, the rock cuttings dryer 10, the thermal desorption rotary kiln 11, the spiral humidifier 12, the second conical buffer tank 13, and the second briquetting machine 14 are connected in sequence. The liquid phase outlet of the thermal desorption rotary kiln 11 is connected to the oil-water separator 15, and the oil-water separator 15 is connected to the water treatment device 16.

[0040] Specifically, the central control room 17 in this application is used to connect and control the water-based drilling waste treatment system and the oil-based drilling waste treatment system;

[0041] Specifically, in this application, the deck vessel 18, the water-based drilling waste treatment system, the oil-based drilling waste treatment system, and the central control room 17 are all located on the deck of the deck vessel 18.

[0042] In a specific embodiment of this application, the open receiving tank 1 is equipped with a waste collection bin for collecting water-based drilling waste generated during the drilling process of an offshore drilling platform. The temporary storage tank 2 is equipped with a waste storage bin, which is connected to the open receiving tank 1 and the waste collection bin, for temporarily storing water-based drilling waste.

[0043] In this application, the temporary storage tank 2 can be designed as two and serve as backup devices for each other. The two tanks can simultaneously store a larger amount of water-based drilling waste. One end of each temporary storage tank 2 is connected to the open receiving tank 1, and the other end is connected to the multi-functional integrated tank 3.

[0044] The multi-functional integrated tank 3 is equipped with a dosing chamber and a flocculation chamber. The flocculation chamber is connected to the temporary storage tank 2, specifically to the waste storage chamber of the temporary storage tank 2. The dosing chamber is connected to the flocculation chamber. The dosing chamber is used to prepare the chemicals for treating water-based drilling waste and to transport the prepared chemicals to the flocculation chamber.

[0045] The feed tank 4 is equipped with a waste buffer chamber and a slurry pump, and the waste buffer chamber is connected to the flocculation chamber.

[0046] The slurry pump in the feed tank 4 is used to pump the water-based drilling waste in the waste buffer chamber to the plate and frame filter press 5, and pressurize the water-based drilling waste to complete the solid-liquid separation of the water-based drilling waste in conjunction with the plate and frame filter press 5.

[0047] The first conical buffer tank 6 is equipped with a buffer chamber and a screw conveyor. The buffer chamber is connected to the solid discharge port of the plate and frame filter press 5, and the screw conveyor is connected to the buffer chamber. This screw conveyor is used to output the sludge cake in the buffer chamber to the first briquetting machine 7. The first conical buffer tank 6 can continuously buffer the sludge cake discharged from the plate and frame filter press 5 during the briquetting process of the first briquetting machine 7, and then transport the buffered sludge cake to the first briquetting machine 7 after the briquetting is completed.

[0048] The first briquetting machine 7 is connected to the screw conveyor and is used to press the solid phase separated by the plate and frame filter press 5 into block mud cakes; after the pressed material passes the test, it is sunk into the ocean on site.

[0049] The filtrate receiving tank 8 collects the liquid phase separated from the solid-liquid separation of water-based drilling waste by the plate and frame filter press 5.

[0050] The processing module, consisting of a plate and frame filter press 5, a first conical buffer tank 6, a first briquetting machine 7, and a filtrate receiving tank 8, comprises two parts, as shown in the attached diagram. Figure 5 As shown, the two processing modules can serve as backups for each other or be activated simultaneously. The plate and frame filter press 5 includes a first plate and frame filter press and a second plate and frame filter press; the first conical buffer tank 6 includes a first conical buffer tank and a second first conical buffer tank; the first briquetting machine 7 includes a first briquetting machine and a second first briquetting machine; and the filtrate receiving tank 8 includes a first filtrate receiving tank and a second filtrate receiving tank. Using two processing modules allows the other module to be activated if a step in one module fails, ensuring continuous operation. Simultaneous activation of both modules also improves processing efficiency.

[0051] In a specific embodiment of this application, the oil-based drilling waste treatment system includes a conical receiving tank 9, a cuttings dryer 10, a thermal desorption rotary kiln 11, a spiral humidifier 12, a second conical buffer tank 13, a second briquetting machine 14, an oil-water separator 15, and a water treatment device 16.

[0052] Combined with appendix Figure 6 The conical receiving tank 9 is equipped with two interconnected conical waste collection bins, which are connected by a connecting groove 28. The conical receiving tank 9 is used to collect oil-based drilling waste. The bottom of each conical waste collection bin is equipped with an electric gate valve 24, which is connected to a horizontal screw conveyor 27 at the bottom. The feed rate of the cuttings dryer 10 is controlled by adjusting the opening angle of the electric gate valve 24. The horizontal screw conveyor 27 is connected to the cuttings dryer 10 and is used to transport oil-based drilling waste into the cuttings dryer 10. A steel grating 25 is also installed above the two conical waste collection bins to prevent large debris from entering and damaging the equipment.

[0053] The conical receiving tank 9 receives oil-based drilling waste discharged during the drilling process. When the material storage reaches 80%, the system opens the electric gate valve 24, and the material enters the cuttings dryer 10 through a vertical pipe for solid-liquid separation.

[0054] The cuttings dryer 10 separates the material into crude oil and solid phase through high-speed centrifugation. The crude oil produced is recycled by the drilling team, while the solid rock cuttings are fed into the desorption chamber 19 of the thermal desorption rotary kiln 11 via the feeding belt conveyor 26 for thermal desorption.

[0055] The drive motor of the feeding belt conveyor 26 is an explosion-proof variable frequency motor, which can adjust the material conveying speed by changing the motor frequency.

[0056] The thermal desorption rotary kiln 11 used in this application includes a desorption chamber 19, a spray tower 20, a non-condensable gas demister 21, and a non-condensable gas combustion furnace 22, combined with... Figure 7 and attached Figure 8 The desorption chamber 19 is connected to the rock cuttings dryer 10. The non-condensable gas combustion furnace 22 and the non-condensable gas demister 21 are located on the top of the desorption chamber 19. The non-condensable gas combustion furnace 22 is connected to the desorption chamber 19 through the non-condensable gas demister 21. The spray tower 20 is located on the top of the tail end of the desorption chamber 19. The spray tower 20 is used to cool the high-temperature pyrolysis gas.

[0057] The thermal desorption rotary kiln 11 heats the material in the desorption chamber 19 to a high temperature of 800-900°C through multiple sets of electromagnetic heating coils, so that organic pollutants can be volatilized or separated from the sludge medium.

[0058] The separated high-temperature pyrolysis gas enters the spray tower 20 through the upper opening at the tail of the thermal desorption rotary kiln 11 for cooling and dust removal.

[0059] The high-temperature oil and gas in the pyrolysis gas is cooled into liquid crude oil by the action of spray water, and then flows by gravity to the oil-water separator 15 together with the spray water for oil-water separation. The residual non-condensable gas in the pyrolysis gas is treated by the non-condensable gas demister 21 and then enters the non-condensable gas combustion furnace 22 for combustion.

[0060] The non-condensable gas combustion furnace 22 is equipped with a water tank. The heat generated by the combustion of non-condensable gas can be introduced into the heating coil in the oil-water separator 15 through water as a medium to increase the temperature inside the tank and accelerate the oil-water separation efficiency.

[0061] The oil-water separator 15 is equipped with an oil-water separation chamber and a crude oil storage chamber. An oil skimming device is installed in the oil-water separation chamber to scrape the oil layer into the crude oil storage chamber. According to sedimentation theory, under the influence of gravity, water flows downwards in the oil-water mixture, while oil droplets float to the top, forming an oil layer. This oil layer is then scraped into the storage chamber by the oil skimming device, thus achieving oil-water separation. The oil-water separation chamber is connected to the oily wastewater outlet of the spray tower 20 of the thermal desorption rotary kiln 11. The crude oil storage chamber is connected to the oil-water separation chamber via an oil guide channel. The oil-water separator 15 is equipped with a heating coil, whose water inlet and outlet are connected to the hot water outlet and cold water return port of the non-condensable gas combustion furnace 22, respectively. The crude oil separated by the oil-water separator 15 is recovered by the well team, and the water enters the water treatment device 16 for further removal of small solid particles and small organic molecules. Qualified water is discharged into a watertight container, awaiting subsequent use or discharge into the ocean.

[0062] A heating coil can also be installed on the oil-water separator 15 to improve the oil-water separation efficiency. The water inlet and outlet of the heating coil are connected to the hot water outlet and cold water return outlet of the non-condensable gas combustion furnace 22, respectively.

[0063] The solid phase after being processed by the thermal desorption rotary kiln 11 is discharged into the spiral humidifier 12 for cooling and humidification. The spiral humidifier 12 includes a spiral conveyor and spray nozzles. The spray nozzles are set on the spiral conveyor and spray water to humidify and cool the high-temperature material from the thermal desorption rotary kiln 11 conveyed in the spiral conveyor. The feed inlet of the spiral humidifier 12 is connected to the discharge outlet of the thermal desorption rotary kiln 11.

[0064] A second conical buffer tank 13 is also provided between the spiral humidifier 12 and the second briquetting machine 14. The second conical buffer tank 13 includes a buffer chamber and a spiral conveyor. The buffer chamber is connected to the discharge port of the spiral humidifier 12, and the spiral conveyor is connected to the buffer chamber. The spiral conveyor is used to transport the mud cake in the buffer chamber to the second briquetting machine 14. The second conical buffer tank 13 allows the mud cake to be temporarily stored during the briquetting process of the second briquetting machine 14. After the second briquetting machine 14 completes the briquetting process, the buffered mud cake is then transported to the second briquetting machine 14 for further briquetting. After the briquetting material passes inspection, it is discharged into the ocean on-site.

[0065] The following components are connected to and controlled by the central control room 17: open receiving tank 1, temporary storage tank 2, multi-functional integrated tank 3, feeding tank 4, plate and frame filter press 5, filtrate receiving tank 8, first conical buffer tank 6, second conical buffer tank 13, first briquetting machine 7, second briquetting machine 14, conical receiving tank 9, rock cuttings dryer 10, feeding belt conveyor 26, thermal desorption rotary kiln 11, water treatment device 16, oil-water separator 15, and spiral humidifier 12.

[0066] Deck ship 18 can be converted from a 50,000-ton oil tanker, with a total length of 210m, a beam of 36m, and a depth of 30m. Of course, other types of cruise ships can also be converted according to actual conditions. Open receiving tank 1, temporary storage tank 2, multi-functional integrated tank 3, feeding tank 4, plate and frame filter press 5, filtrate receiving tank 8, first conical buffer tank 6, second conical buffer tank 13, first briquetting machine 7, second briquetting machine 14, conical receiving tank 9, rock cuttings dryer 10, feeding belt conveyor 26, thermal desorption rotary kiln 11, water treatment device 16, oil-water separator 15, spiral humidifier 12, and central control room 17 are all installed on the deck of deck ship 18.

[0067] The deck ship 18 is also equipped with a watertight compartment that can be used to store water and crude oil generated after the treatment of drilling waste, and can also be used as a water tank to provide water for other equipment.

[0068] The thermal desorption rotary kiln 11 replaces the traditional gas heating with electromagnetic heating, eliminating the need for gas storage tanks and their pipelines, combustion fans and other supporting equipment, greatly simplifying the equipment structure and making the heating temperature control more precise.

[0069] In use, the open receiving tank 1 receives water-based drilling waste discharged during the drilling process. The magnetic level gauge on the open receiving tank 1 measures the height of the material level in the lower tank. The volume of mud (m³) in the lower tank can be calculated based on the specifications of the open receiving tank 1. 3 When the volume of mud in the open receiving tank 1 is (m³) 3 When the required amount of mud for subsequent processes is met, the system automatically opens the first sand pump between the open receiving tank 1 and the temporary storage tank 2 to pump the mud into the temporary storage tank 2.

[0070] A flow meter is installed on the pipeline. When waste flows through the flow meter, the amount of waste is recorded. At this time, the required amount of waste can be set. The flow rate value fed back by the flow meter is compared with the set value. When the flow rate value fed back by the flow meter is equal to the set value, the first sand pump can stop working. This is used to control the amount of waste discharged into the temporary storage tank 2.

[0071] Two first sand pumps can be set up, and the inlets of both first sand pumps are connected to the open receiving tank 1. The outlets of the two first sand pumps are connected and merged into a pipeline, which is connected to the temporary storage tank 2. Both first sand pumps are equipped with electromagnetic butterfly valves at their inlets and outlets. The failure of either first sand pump will not affect the production operation.

[0072] The temporary storage tank 2 is equipped with a mud mixer and a second sand pump. There are two second sand pumps, which are connected in parallel between the temporary storage tank 2 and the multi-functional integrated tank 3. Both ends of the second sand pump are equipped with electromagnetic butterfly valves.

[0073] The multi-functional integrated tank 3 is also equipped with a metering pump in its flocculation chamber.

[0074] The multi-functional integrated tank 3 is also equipped with a metering pump and a radar level gauge in its dispensing compartment, along with a flow meter on the pipeline. The desired dosage can be set, and the flow rate feedback from the flow meter is compared with the set value. When the flow rate feedback matches the set value, the metering pump stops operating. When the radar level gauge detects a liquid level below a certain height, the system prompts for dispensing.

[0075] The slurry, after being treated and conditioned, can be pumped into feed tank 4 via a sand pump. Feed tank 4 is also equipped with a radar level gauge. When the liquid level meets the required slurry volume for plate and frame filter press 5, the system activates the slurry pump to pump the slurry from the feed tank into plate and frame filter press 5 for solid-liquid separation. Specifically, there can be two slurry pumps, one for plate and frame filter press 1 and the other for plate and frame filter press 2.

[0076] A pipeline pump is installed inside the filtrate receiving tank 8, and a radar level gauge is also installed on the filtrate receiving tank 8.

[0077] After solid-liquid separation by the plate and frame filter press 5, the water enters the filtrate receiving tank 8 for temporary storage. The radar level gauge on the filtrate receiving tank 8 can be set with high and low liquid level values. When the liquid level is higher than the set value, the pipeline pump starts to work and pumps the filtrate to the watertight compartment of the deck ship. When the liquid level is lower than the set value, the pipeline pump stops working.

[0078] This application also includes a raised platform 23, on which both the open receiving tank 1 and the conical receiving tank 9 are mounted, while the temporary storage tank 2 and the rock cuttings dryer 10 are located below the raised platform 23. This significantly reduces the equipment's footprint and allows the material in the conical receiving tank 9 to flow by gravity into the rock cuttings dryer 10.

[0079] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," and "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A marine treatment device for offshore drilling waste, characterized in that, include: The water-based drilling waste treatment system consists of an open receiving tank, a temporary storage tank, a multi-functional integrated tank, a feeding tank, a plate and frame filter press, a first conical buffer tank, and a first briquetting machine connected in sequence. The liquid phase outlet of the plate and frame filter press is connected to the filtrate receiving tank. The oil-based drilling waste treatment system consists of a conical receiving tank, a cuttings dryer, a thermal desorption rotary kiln, a spiral humidifier, a second conical buffer tank, and a second briquetting machine connected in sequence. The liquid phase outlet of the thermal desorption rotary kiln is connected to an oil-water separator, and the oil-water separator is connected to a water treatment device. The central control room is used to connect to and control the water-based drilling waste treatment system and the oil-based drilling waste treatment system; The deck vessel, the water-based drilling waste treatment system, the oil-based drilling waste treatment system and the central control room are all located on the deck of the deck vessel; The thermal desorption rotary kiln includes a desorption chamber, a spray tower, a non-condensable gas demister, and a non-condensable gas combustion furnace. The desorption chamber is connected to the rock cutting dryer. The non-condensable gas combustion furnace and the non-condensable gas demister are located at the top of the desorption chamber. The non-condensable gas combustion furnace is connected to the desorption chamber through the non-condensable gas demister. The spray tower is located at the top of the tail end of the desorption chamber and is used to cool the high-temperature pyrolysis gas. The oil-water separator is equipped with an oil-water separation chamber and a crude oil storage chamber. An oil skimming device is installed in the oil-water separation chamber to skim the oil layer into the crude oil storage chamber. The oil-water separation chamber is connected to the oily wastewater outlet of the spray tower. The crude oil storage chamber is connected to the oil-water separation chamber through an oil guide channel. A heating coil is installed on the oil-water separator. The water inlet and outlet of the heating coil are connected to the hot water outlet and cold water return outlet of the non-condensable gas combustion furnace, respectively.

2. The offshore treatment equipment for offshore drilling waste according to claim 1, characterized in that, The temporary storage tanks are two backup devices for each other. Each of the two temporary storage tanks is connected at one end to the open receiving tank and at the other end to the multi-functional integrated tank. The processing module consisting of the plate and frame filter press, the first conical buffer tank, the first briquetting machine and the filtrate receiving tank consists of two modules, which are either backups for each other or can be used simultaneously.

3. The offshore treatment equipment for offshore drilling waste according to claim 1, characterized in that, The multifunctional integrated tank is equipped with a dosing chamber and a flocculation chamber. The flocculation chamber is connected to the temporary storage tank. The dosing chamber is used to prepare chemicals for treating water-based drilling waste and to transport the prepared chemicals to the flocculation chamber.

4. The marine treatment equipment for offshore drilling waste according to claim 1, characterized in that, The spiral humidifier includes a spiral conveyor and spray nozzles. The spray nozzles are installed on the spiral conveyor and spray water to humidify and cool the high-temperature material from the thermal desorption rotary kiln conveyed in the spiral conveyor.

5. The offshore treatment equipment for offshore drilling waste according to claim 1, characterized in that, It also includes a raised platform, on which both the open receiving tank and the conical receiving tank are mounted, and below the raised platform the temporary storage tank and the rock cuttings dryer are mounted.

6. The offshore treatment equipment for offshore drilling waste according to claim 1, characterized in that, It also includes a first sand pump, of which there are two and connected in parallel between the open receiving tank and the temporary storage tank, and each end of the first sand pump is equipped with an electromagnetic butterfly valve.

7. The marine treatment equipment for offshore drilling waste according to claim 1, characterized in that, The temporary storage tank is equipped with a mud mixer and a second sand pump. There are two second sand pumps connected in parallel between the temporary storage tank and the multi-functional integrated tank. Both ends of the second sand pump are equipped with electromagnetic butterfly valves.

8. The offshore treatment equipment for offshore drilling waste according to claim 1, characterized in that, The conical receiving tank is equipped with two interconnected conical waste collection chambers. Each of the two conical waste collection chambers is equipped with an electric gate valve at its bottom, and a steel grating is installed above the two conical waste collection chambers.

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