CN210530777U - Base oil recovery unit in drilling oil base mud detritus - Google Patents
Base oil recovery unit in drilling oil base mud detritus Download PDFInfo
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- CN210530777U CN210530777U CN201920969192.5U CN201920969192U CN210530777U CN 210530777 U CN210530777 U CN 210530777U CN 201920969192 U CN201920969192 U CN 201920969192U CN 210530777 U CN210530777 U CN 210530777U
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Abstract
The utility model discloses a well drilling oil base mud detritus medium-sized oil recovery unit. The device consists of a heater, a high-speed centrifuge, a condensing device, a drilling fluid storage tank, a solid particle storage tank, an oil gas collecting pipeline, a wastewater collecting pipeline and a waste gas pipeline; the heater comprises a heating medium channel and a rock debris channel which move in opposite directions, and an oil-containing steam outlet is also arranged at the outlet end of the rock debris channel; the oil-containing steam outlet is connected with the inlet of a condensing device, the condensing device is a condenser with a water jacket structure, and the condensate outlet is connected with a recovery tank. The utility model discloses a low temperature heating, centrifugal separation realize the separation of solid particle and base oil in the oil base mud, do not change the physical properties of base oil, can be used to the secondary and prepare oil base drilling mud, utilize the waste heat heating waste oil base mud of cement kiln tail, further improved the thermal utilization ratio of cement kiln, reduce separation processes's running cost, adopt indirect contact heating waste oil base mud, effectively improve the factor of safety of equipment operation.
Description
Technical Field
The utility model belongs to the technical field of hazardous waste handles, a cement kiln coprocessing hazardous waste's technical method is related to, especially, relate to a system's equipment that is used for cement kiln coprocessing drilling oil base mud detritus.
Background
The drilling oil-based cuttings are solid wastes generated in the drilling process of oil and gas resources, contain a large amount of oil substances, can seriously pollute the environment when being directly discharged, and are dangerous wastes regulated in national plain texts. The harmless treatment of the drilling oil-based mud detritus becomes a pain point and a difficulty point in the green exploitation process of oil and gas resources.
The existing treatment process flow comprises the steps of separating rock debris in the oil-based drilling fluid through a vibrating screen, dewatering and deoiling the oil-based drilling rock debris through a drier and a centrifugal machine, and forming oil-based rock debris dry powder with low oil content and waste oil-containing drilling oil-based mud rock debris with high oil content. Wherein, the oil-based dry detritus powder with low oil content is subjected to harmless treatment by high-temperature incineration.
The high-oil-content drilling oil-based mud cuttings contain a large amount of high-value oil resources, but the high-oil-content drilling oil-based mud cuttings have high density and poor flowability due to the fact that a large amount of fine cuttings particles are contained, and cannot be directly secondarily used for preparing the oil-based drilling fluid. The harmless treatment can be realized by directly burning high temperature, but the waste of oil resources is large. At present, the recovery of base oil can be realized by processes such as thermal desorption and extraction. The thermal desorption is to obtain the base oil through heating and distilling, as the slurry is required to be heated to more than 400 ℃, part of the base oil is subjected to thermal cracking to generate harmful and peculiar volatile organic gas, and the recovered base oil cannot be reused for preparing the drilling oil base slurry cuttings and cannot be reused in other fields; the extraction process is to use an extracting agent to realize the three-phase separation of solid, oil and water, and the recovered base oil can be recycled for the second time, but the extraction process has the problems of high cost and small processing capacity.
Disclosure of Invention
The utility model discloses a drilling oil base mud detritus base oil recovery unit according to prior art's not enough. The to-be-solved problem of the utility model is to provide a drilling oil base mud detritus base oil recovery unit that more environmental protection, utilization ratio are higher.
The utility model discloses a following technical scheme realizes:
the base oil recovery unit in drilling oil base mud detritus which characterized in that: the recovery device consists of a heater, a high-speed centrifuge, a condensing device, a drilling fluid storage tank, a solid particle storage tank, an oil gas collecting pipeline, a wastewater collecting pipeline and a waste gas pipeline.
The heater comprises a heating medium channel and a drilling oil-based mud debris channel which move in opposite directions, and an oil-containing steam outlet is also formed at the outlet end of the drilling oil-based mud debris channel; the oil-containing steam outlet is connected with the inlet of a condensing device, the condensing device is a condenser with a water jacket structure, and the condensate outlet is connected with a recovery tank.
The feeding port of the high-speed centrifuge is connected with the drilling oil-based mud and rock debris outlet of the heater; the centrifugal liquid outlet is connected with a drilling fluid storage tank.
The heater is an electric heater or a heating medium heating device, and the heating temperature is 40-350 ℃.
Further, the heater may be a paddle heater comprising a rotatable central shaft forming a heat medium passage and disks radially spaced and densely arranged around the central shaft.
The centrifugal machine is one of a horizontal spiral sedimentation centrifugal machine, a butterfly centrifugal machine or a tubular centrifugal machine.
The utility model discloses recovery unit realizes that base oil retrieves in the drilling oil base mud detritus through following technology:
(A) feeding the drilling oil-based mud cuttings into a heater, and heating the drilling oil-based mud cuttings to 40-350 ℃ through heat transfer;
(B) the heated drilling oil base mud detritus enters a high-speed centrifuge for centrifugally separating solid particles and drilling fluid in the waste drilling oil base mud detritus, wherein the solid particles consist ofThe sealed pipeline is sent into a solid particle storage tank for storage and standby, and the drilling fluid is sent into a drilling fluid storage tank for storage through the sealed pipeline. The treated base oil has a density of 1.1g/cm or less3The kinematic viscosity value is less than or equal to 40mm at 40 DEG C2/s。
(C) The oil-containing gas generated in the heating and centrifuging processes is cooled by a condensing device to form oil-containing condensate, the oil-containing condensate is sent to a wastewater treatment facility for oil-water separation, a small amount of base oil generated in the condensing process is directly led into a drilling fluid storage tank for storage through a pipeline, and the condensate of high-temperature steam is sewage cold water and is directly sent to the wastewater treatment facility for treatment; the non-condensable gas is sent into a cement production system through a sealed pipeline for high-temperature incineration and decomposition.
Adopt the utility model discloses the device, after drilling oil base mud detritus got into the heater, through direct heating or indirect heating mode heating drilling oil base mud detritus, mud viscosity reduces along with the temperature risees to under the effect of the actuating system flow to the export. When the drilling oil-based mud cuttings are heated by the heat medium, the flow direction of the heat medium is opposite to that of the drilling oil-based mud cuttings. An oil-containing gas outlet is arranged above the heater, and the heat medium and volatile components in the drilling oil-based mud debris flow into the condensing device from the outlet.
The heating heat source of the heater is from steam generated by cement calcination kiln tail waste heat power generation, kiln tail gas or steam generated by using the kiln tail gas, and the temperature of the steam or the kiln tail gas for heating is 60-350 ℃.
After the drilling oil-based mud detritus enters the high-speed centrifuge, under the centrifugal action, solid particles settle to the outer wall, liquid with light density is left in the central area, and the solid particles and the light liquid flow to different outlets respectively, so that the separation of the solid particles and the base oil in the drilling oil-based mud detritus is realized. The oil-containing condensate consists of base oil, a small amount of oil-containing condensate and solid particles.
The utility model discloses profitability:
1. the quality of the recovered base oil is good. The method of low-temperature heating and centrifugal separation is adopted to realize the separation of the solid particles and the base oil in the drilling oil-based mud detritus, the physical property of the base oil is not changed, and the method can be used for secondary preparation of the drilling oil-based mud detritus to realize the recycling of the base oil.
2. The recovery process is high in safety. By heating the drilling oil base mud detritus, the viscosity value of the drilling oil base mud detritus is reduced, solid-liquid separation of the drilling oil base mud detritus can be realized under the condition of low rotating speed, and the reliability and the operating efficiency of the centrifugal machine are improved. And the drilling oil-based mud cuttings are heated by indirect contact, so that the safety factor of equipment operation is effectively improved. If the horizontal screw centrifuge is adopted, the slag can be continuously discharged through the blades of the screw conveyor, and the continuous production of the process flow is realized.
3. The base oil recovery cost is low. The method has the advantages that the base oil in the waste drilling oil-based mud detritus is recovered by adopting a physical method, the treatment cost of the drilling oil-based mud detritus can be effectively reduced, the waste heat of the tail of the cement kiln is utilized to heat the drilling oil-based mud detritus, the operation cost of a separation process is further reduced, meanwhile, the waste heat steam can also push the central shaft and the disc to rotate, the drilling oil-based mud detritus is heated through heat transfer, the disc is driven to rotate through the central shaft to push the mud to flow to the outlet, and the problems of.
4. Can effectively control the secondary pollution. The heating and separating process of the drilling oil-based mud detritus is completely in a closed device, oil-containing gas generated by heating and separating enters a condensing device through a sealed pipeline to form base oil, oil-containing wastewater and non-condensable gas, the base oil enters a drilling fluid tank for storage, the oil-containing wastewater is sent to a cement production system for high-temperature incineration and decomposition or is discharged after reaching the standard after wastewater treatment, and the non-condensable gas is then led into a high-temperature section of the cement production system for incineration and decomposition through a pipeline. Thereby effectively avoiding the problem of secondary pollution generated in the process of treating the drilling oil-based mud cuttings.
Drawings
FIG. 1 is a process flow diagram of a drilling oil based mud cuttings base oil recovery system;
FIG. 2 is a schematic flow diagram of a drilling oil based mud cuttings base oil recovery system installation;
FIG. 3 is a schematic flow diagram of another apparatus of the drilling oil based mud cuttings base oil recovery system.
In the figure, 1 is a heater, 2 is a hot water outlet, 3 is a hollow disk, 4 is a hollow shaft, 5 is a drilling oil-based mud debris outlet, 6 is a water vapor inlet, 7 is an oil-containing gas outlet, 8 is a drilling oil-based mud debris inlet, 9 is an oil-containing gas inlet, 10 is a cooling water inlet, 11 is a condensate outlet, 12 is a cooling water outlet, 13 is a condensing device, 14 is a horizontal screw centrifuge, 15 is a solid particle outlet, 16 is a screw blade, 17 is a rotary drum, 18 is a light liquid outlet, 19 is a drilling oil-based mud debris inlet, 20 is a drilling fluid storage tank, and 21 is a tubular centrifuge.
Detailed Description
The present invention will be further described with reference to the following embodiments, which are intended to illustrate the principles of the present invention without limiting the present invention in any way, and the present invention is not beyond the scope of the present invention.
With reference to the attached drawings.
Example 1
The utility model discloses well drilling oil base mud detritus is adopted from certain shale gas drilling platform in certain Sichuan, and specific composition and performance are seen in table 1.
TABLE 1 waste drilling oil based mud detritus composition and Properties
Example 2
The equipment for treating the drilling oil-based mud detritus consists of a slurry heater, a horizontal spiral centrifuge, a high-temperature steam pipeline, a condensing device, a drilling fluid storage tank, an oil gas collecting pipeline, a wastewater collecting pipeline and a waste gas pipeline. The specific implementation steps are as follows:
the drilling oil base mud detritus is sent into the thick liquid formula heater by the feed inlet, fills the space between casing and hollow disc, through the effect of the propulsion on the disc/agitator, stirs, impels the drilling oil base mud detritus. Hot steam at the tail of the cement kiln enters from a heat source inlet and flows through the hollow shaft and the hollow disc, and high-temperature steam enters the heating hollow disc of the slurry heater to indirectly heat the drilling oil-based mud cuttings. The heating and condensing process generates hot drilling oil-based mud detritus, oil-containing gas, non-condensable gas, oil-containing sewage and sewage cold water, the hot drilling oil-based mud detritus is discharged from a material outlet of the slurry heater and is sent to a horizontal spiral centrifuge by a closed device for next treatment; condensed water of the high-temperature steam is dirty cold water which is discharged from a heat source outlet of the slurry heater and is sealed, collected by a waste water pipeline and enters a waste water treatment facility; the oily gas generated in the heating process is introduced into a condensing device from a gas outlet of a slurry heater in a closed manner, the oily condensate is sent to a wastewater treatment facility for oil-water separation, a small amount of base oil generated in the cooling process is introduced into a base oil storage tank through a pipeline for storage, and the non-condensable gas is sent into a cement production system for high-temperature incineration decomposition through a sealed pipeline.
The hot drilling oil-based mud detritus discharged from the slurry heater is sent into a horizontal spiral centrifuge through a closed pipeline, a high-speed rotating drum generates strong centrifugal force to settle solid particles in the mud to the inner wall of the drum, the spiral and the drum have relative motion (namely, rotational speed difference) due to different rotational speeds, the solid particles and other solid matters deposited on the inner wall of the drum are pushed to an outlet at the small end of the drum to be discharged by utilizing the relative motion of the spiral and the drum, the solid particles after solid-liquid separation are discharged from the other end of the centrifuge and are guided into a solid particle storage bin through the closed pipeline for standby, and the base oil enters a drilling fluid storage tank to be stored.
Example 3
The equipment for treating the drilling oil-based mud detritus consists of a slurry heater, a tubular centrifuge, a high-temperature steam pipeline, a condensing device, a drilling fluid storage tank, an oil gas collecting pipeline, a wastewater collecting pipeline and a waste gas pipeline.
The drilling oil base mud detritus is sent into the thick liquid formula heater by the feed inlet, fills the space between casing and hollow disc, through the effect of the propulsion on the disc/agitator, stirs, impels the drilling oil base mud detritus. Hot steam at the tail of the cement kiln enters from a heat source inlet and flows through the hollow shaft and the hollow disc, and high-temperature steam enters the heating hollow disc of the slurry heater to indirectly heat the drilling oil-based mud cuttings. In the heating process, the generated hot drilling oil-based mud detritus, oil-containing gas, non-condensable gas, oil-containing sewage and sewage cold water are discharged from a material outlet of the slurry heater and are sent into a tubular centrifuge by a closed device for next treatment; condensed water of the high-temperature steam is dirty cold water which is discharged from a heat source outlet of the slurry heater and is sealed, collected by a waste water pipeline and enters a waste water treatment facility; the oil-containing gas generated in the heating process is led into a condensing device from a gas outlet of a slurry heater in a closed manner for condensation, the cooled oil-containing condensate is sent to a wastewater treatment facility for oil-water separation, a small amount of base oil generated in the condensation process is led into a base oil storage tank for storage through a pipeline, and the non-condensable gas is sent into a cement production system for high-temperature incineration and decomposition through a sealed pipeline.
The hot drilling oil-based mud detritus enters a tubular centrifuge through a bottom feeding port, the mud is forced to flow upwards along the inner wall of the rotary drum by centrifugal force, solid particles with high density in the mud settle and are out of the outer side under the centrifugal action, the solid particles are discharged along heavy liquid outlets on two sides and are guided into a solid particle storage bin for standby through a closed pipeline, and the drilling fluid with low density is discharged into a drilling fluid storage tank from a light liquid outlet on the top for storage.
The processing parameters of case 2 and case 3 and the performance parameters of the drilling oil-based mud cuttings obtained after processing are shown in the following table 2:
the drilling oil-based mud cuttings contain a large amount of oil and tiny solid particles, the viscosity of the slurry is high at room temperature, and the effect of separating the solid particles by using a centrifugal machine is poor. The waste drilling oil-based mud and rock debris are heated in the disc dryer by utilizing the steam at the tail of the cement kiln, and the viscosity value is reduced by increasing the temperature, so that the separation efficiency of the centrifugal machine is improved. As is clear from the results of examples 2 and 3, the final base oil density was obtained<1.1g/cm3Kinematic viscosity<20mm2And/s, meeting the requirement of secondary preparation of the drilling oil-based mud and rock debris.
Claims (4)
1. A base oil recovery unit in drilling oil base mud detritus which characterized in that: the recovery device consists of a heater, a high-speed centrifuge, a condensing device, a drilling fluid storage tank, a solid particle storage tank, an oil gas collecting pipeline, a wastewater collecting pipeline and a waste gas pipeline;
the heater comprises a heating medium channel and a drilling oil-based mud debris channel which move in opposite directions, and an oil-containing steam outlet is also formed at the outlet end of the drilling oil-based mud debris channel; the oil-containing steam outlet is connected with the inlet of a condensing device, the condensing device is a condenser with a water jacket structure, and the condensate outlet is connected with a recovery tank;
the feed inlet of the high-speed centrifuge is connected with the drilling oil-based mud and rock debris outlet of the heater, the centrifugal liquid outlet is connected with the drilling fluid storage tank, and the centrifugal particle outlet is connected with the solid particle storage tank.
2. The apparatus for recovering base oil from drilling oil based mud cuttings of claim 1, wherein: the heater is an electric heater or a heating medium heating device.
3. The apparatus for recovering base oil from drilling oil based mud cuttings of claim 2, wherein: the heater is a slurry heater and comprises a rotatable central shaft forming a heat medium channel and disks which are radially and densely distributed at intervals on the periphery of the central shaft.
4. The apparatus for recovering base oil from drilling oil based mud cuttings of claim 2, wherein: the centrifugal machine is one of a horizontal spiral sedimentation centrifugal machine, a butterfly centrifugal machine or a tubular centrifugal machine.
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| CN113833424A (en) * | 2021-09-24 | 2021-12-24 | 宁波锋成先进能源材料研究院有限公司 | Drilling rock debris treatment device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113833424A (en) * | 2021-09-24 | 2021-12-24 | 宁波锋成先进能源材料研究院有限公司 | Drilling rock debris treatment device and method |
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