CN115432893A

CN115432893A - Treatment process of greasy dirt

Info

Publication number: CN115432893A
Application number: CN202110621969.0A
Authority: CN
Inventors: 马中发; 宇坤; 张虎晨
Original assignee: Shaanxi Qinglang Wancheng Environmental Protection Technology Co Ltd
Current assignee: Shaanxi Qinglang Wancheng Environmental Protection Technology Co Ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2022-12-06

Abstract

The invention provides a dirty oil sludge treatment process, which relates to the technical field of dirty oil sludge treatment and comprises the following steps: drying the dirty oil sludge to be treated in an environment with the temperature less than or equal to 100 ℃; crushing the dried dirty oil sludge; wherein the particle size of the crushed particles is less than or equal to 2cm; filling nitrogen into the particles, adding wave-absorbing particles, and performing microwave pyrolysis; and condensing and recycling the pyrolyzed gas, and screening the pyrolyzed residue. The dirty oil sludge treatment process provided by the invention realizes high-efficiency treatment of various dirty oil sludge, does not generate secondary pollution, has higher oil recovery rate, saves energy and reduces energy consumption by implementing the processes of drying, crushing, microwave cracking, condensation recovery and the like of the dirty oil sludge.

Description

Treatment process of greasy dirt

Technical Field

The invention relates to the technical field of oil sludge treatment, in particular to an oil sludge treatment process.

Background

With the development of the industrialization process, the development of the technical fields of petroleum development, production, processing and the like is greatly advanced, and in the application fields, a large amount of oil sludge is involved and generated. The oil field dirty oil sludge pool is the place that each well site, gathering and transportation station, union station, switching measurement station etc. are used for sewage, mud to buffer memory, long-time use, and the bottom of the pool can deposit a large amount of dirty fatlute, and the journey state that hardens, and most dirty oil sludge pool are half closed form, and the cell body is darker, and wherein oil gas content is high.

In the prior art, the main method for treating the oil sludge comprises the steps of pumping the oil sludge into a heating stirring tank, adding agents such as a demulsifier, a cleaning agent and the like, heating to 60-80 ℃, then feeding into a two-phase common horizontal sewage spiral centrifuge, simultaneously adding a flocculating agent, separating the sludge from an oil-water mixture, and then separating oil from water.

However, the method for treating the oil sludge in the prior art has the problems of poor treatment effect and secondary pollution.

Disclosure of Invention

The invention aims to provide a dirty oil sludge treatment process aiming at the defects of the dirty oil sludge treatment method in the prior art, so as to solve the problems of poor treatment effect and secondary pollution in the dirty oil sludge treatment method in the prior art.

In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:

in a first aspect, the present invention provides a sludge treatment process, comprising:

drying the dirty oil sludge to be treated in an environment with the temperature less than or equal to 100 ℃;

crushing the dried dirty oil sludge; wherein the particle size of the crushed particles is less than or equal to 2cm;

filling nitrogen into the particles, adding wave-absorbing particles, and performing microwave pyrolysis;

and condensing and recycling the pyrolyzed gas, and screening the pyrolyzed residue.

Optionally, the wave-absorbing particles at least include one of silicon carbide, graphite and metal oxide.

Optionally, the condensing and recycling the pyrolyzed gas, and screening the pyrolyzed residue, further includes:

acquiring gas parameters at the gas outlet; wherein the gas parameters include concentration and temperature;

controlling a target power of the microwave source based on the gas parameter.

Optionally, the method further comprises the steps of charging nitrogen into the particles, adding wave-absorbing particles, and performing microwave pyrolysis;

obtaining the content of the particulate matter;

based on the content of the particulate matter, the amount of nitrogen charged is determined.

Optionally, the determining the amount of nitrogen charged based on the content of the particulate matter further includes:

acquiring the content of oxygen;

determining the content of nitrogen based on the oxygen content and the content of particulate matter.

The invention has the beneficial effects that: the invention provides a dirty oil sludge treatment process, and relates to the technical field of dirty oil sludge treatment, wherein the process comprises the following steps: drying the dirty oil sludge to be treated in an environment with the temperature less than or equal to 100 ℃; crushing the dried dirty oil sludge; wherein the particle size of the crushed particles is less than or equal to 2cm; filling nitrogen into the particles, adding wave-absorbing particles, and performing microwave pyrolysis; and condensing and recycling the pyrolyzed gas, and screening the pyrolyzed residue. Namely, the dirty oil sludge treatment process provided by the invention realizes high-efficiency treatment on various dirty oil sludge, does not generate secondary pollution, has higher oil recovery rate, saves energy and reduces energy consumption by implementing the processes of drying, crushing, microwave pyrolysis, condensation recovery and the like of the dirty oil sludge.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a schematic view of a process flow for treating oil sludge according to an embodiment of the present invention;

FIG. 2 is a schematic view of a sludge treatment apparatus according to another embodiment of the present invention;

fig. 3 is a schematic view of a contaminated oil sludge treatment apparatus according to another embodiment of the present invention.

An icon: 1-a preprocessor, 2-a metal cavity, 3-a microwave source, 4-a condenser, 5-a screener, 11-a drying area and 12-a pulverizer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the present product is conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

FIG. 1 is a schematic view of a process flow for treating contaminated oil sludge according to an embodiment of the present invention;

FIG. 2 is a schematic view of a contaminated oil treatment apparatus according to another embodiment of the present invention; fig. 3 is a schematic view of a contaminated oil sludge treatment apparatus according to another embodiment of the present invention. The process of the method for treating oil sludge according to the embodiment of the present invention will be described in detail with reference to fig. 1 to 3.

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment of the invention provides a dirty oil sludge treatment process which is applied to a dirty oil sludge treatment device. The steps involved in the process are described in detail below with reference to fig. 1.

Step 101: drying the dirty oil sludge to be treated in an environment with the temperature less than or equal to 100 ℃.

In the embodiment of the invention, the dirty oil sludge is generated in the oil field production process, and is generated during the extraction, storage, gathering and processing of crude oil.

Illustratively, based on a temperature environment of less than 100 ℃, dirty oil sludge in the preprocessor is electrically heated to remove water in the dirty oil sludge, so that the dirty oil sludge is dried; in the electric heating process, exhaust gas, residue and smoke are generated little, and the object to be heated can be kept clean without polluting the environment.

Step 102: crushing the dried dirty oil sludge; wherein the particle size of the crushed particles is less than or equal to 2cm.

In the embodiment of the invention, dried dirty oil sludge solid is crushed by a crusher, and the particle size of crushed dirty oil sludge particles is controlled to be less than 2cm. Optionally, the crushed particles are filtered by a filter screen with the aperture smaller than 2cm, so that the particle size of the sludge particles can be ensured, and further the sludge particles can fully react.

Step 103: and filling nitrogen into the particles, adding wave-absorbing particles, and performing microwave pyrolysis.

In the embodiment of the invention, the wave-absorbing particles at least comprise one of silicon carbide, graphite and metal oxide.

Illustratively, step 103 fills nitrogen into the particles, and adds wave-absorbing particles to perform microwave pyrolysis, which specifically includes:

and step 1031, obtaining the content of the particulate matters.

In the embodiment of the invention, the controller acquires the content of the particulate matters in the metal cavity from the sensor.

And step 1032, determining the amount of the charged nitrogen based on the content of the particles.

In an embodiment of the present invention, step 1032 determines the amount of nitrogen filled based on the content of the particulate matter, including: acquiring the content of oxygen; determining the content of nitrogen based on the oxygen content and the content of particulate matter.

Illustratively, a preset amount of nitrogen is filled into the metal cavity, wherein the preset amount is related to the reaction volume of the metal cavity, and optionally, a user can determine the amount of the nitrogen filled into the preset amount based on the volume of the metal cavity; furthermore, oil sludge particles are added into the metal cavity filled with nitrogen, and after the crushed oil sludge particles are fully mixed with the wave-absorbing particles in the metal cavity, when the feed inlet is determined to be in a closed state, the microwave source is turned on, and the material in the metal cavity is subjected to pyrolysis reaction based on microwaves.

Optionally, the oxygen content in the metal cavity is detected, and the amount of the nitrogen gas filled in the metal cavity is determined based on the oxygen content in the metal cavity.

Step 104: and condensing and recycling the pyrolyzed gas, and screening the pyrolyzed residue.

In this embodiment of the present invention, step 104 is to condense and recover the pyrolyzed gas, and screen the pyrolyzed residue, and then further includes:

and 1041, acquiring a gas parameter at the gas outlet.

Wherein the gas parameters include concentration and temperature.

In the embodiment of the invention, a concentration sensor and a temperature sensor are arranged at the position of the gas outlet in the metal cavity and used for collecting the concentration and the temperature of the gas after reaction and uploading the collected data to the controller.

And 1042, controlling the target power of the microwave source based on the gas parameters.

In the embodiment of the invention, the controller determines that the concentration of the reacted gas is greater than the preset gas concentration or the temperature data of the gas at the gas outlet at the current time is less than the preset temperature based on the collected concentration and temperature data of the reacted gas, the working power of the microwave source is increased, and the adjusted power of the microwave source is the target power.

The invention provides a dirty oil sludge treatment process, which relates to the technical field of dirty oil sludge treatment, and comprises the following steps: drying the dirty oil sludge to be treated in an environment with the temperature less than or equal to 100 ℃; crushing the dried dirty oil sludge; wherein the particle size of the crushed particles is less than or equal to 2cm; filling nitrogen into the particles, adding wave-absorbing particles, and performing microwave pyrolysis; and condensing and recycling the pyrolyzed gas, and screening the pyrolyzed residue. Namely, the dirty oil sludge treatment process provided by the invention realizes high-efficiency treatment on various dirty oil sludge, does not generate secondary pollution, has higher oil recovery rate, saves energy and reduces energy consumption by implementing the processes of drying, crushing, microwave pyrolysis, condensation recovery and the like of the dirty oil sludge.

In another possible embodiment, the present invention further provides a contaminated oil sludge treatment apparatus, as shown in fig. 2, including: preprocessor 1, metal cavity 2, microwave source 3, condenser 4 and sieve 5.

In the embodiment of the invention, the pretreatment area 1 also comprises a temperature and humidity sensor, a controller and a heating pump; the temperature and humidity sensor is connected with the controller, and the controller is also connected with the microwave source.

Illustratively, the temperature and humidity sensor is used for detecting the temperature and the humidity of the oil sludge in the drying process, and the sensor sends data detected in real time to the controller; the controller is used for acquiring data of the temperature and humidity sensor and power data of the microwave source; further, the controller makes a corresponding control strategy based on the acquired data.

Wherein, the preprocessor 1 comprises a drying area 11 and a grinder 12; the preprocessor 1 is connected with the metal cavity 2; the microwave source 3 is arranged outside the metal cavity 2; the condenser 4 is connected with the gas outlet of the metal cavity 2, and the discharge hole of the metal cavity 2 is connected with the sieving device 5.

In the embodiment of the present invention, the drying zone 11 performs drying treatment on the dirty oil sludge based on electrical heating to obtain dried solids, and further based on the crusher 12, the dried solids are crushed. The crushed particles enter the metal cavity 2 through the feed inlet, are fully mixed with the wave-absorbing particles in the metal cavity 2, and are subjected to pyrolysis reaction under the action of microwaves. Optionally, before the crushed particles enter the metal cavity 2, a certain amount of nitrogen is filled into the metal cavity 2 through the air inlet, so that the nitrogen is replaced with air inside the metal cavity 2, the device is protected, and the metal cavity 2 is prevented from exploding under the high-temperature microwave irradiation effect.

Illustratively, the clods of the oil sludge are crushed by a crusher to particles having a particle size of 2cm or less. The microwave absorbing material in the metal cavity 2 comprises one of silicon carbide, graphite and metal oxide, and the particle size of the wave absorbing particles is less than or equal to 2.5cm.

In the embodiment of the invention, a heat insulation layer is also arranged in the metal cavity 2; a control door is arranged at the feed inlet of the metal cavity 2; wave-absorbing particles are further arranged in the metal cavity, and the particle size of the West wave particles is smaller than 2.5cm.

Illustratively, the microwave source 3 comprises a plurality of microwave sources 3, a plurality of microwave sources 3 are arrayed on the side wall of the metal cavity 2, and the microwave sources 3 release microwaves under the action of a power supply to act on the medical waste in the metal cavity 2 through the metal cavity 2. The microwave is an electric wave having a frequency of 300 mhz to 300 ghz, and water molecules in the heated medium material are polar molecules. Under the action of a rapidly changing high-frequency point magnetic field, the polarity orientation of the magnetic field changes along with the change of an external electric field. The effect of mutual friction motion of molecules is caused, at the moment, the field energy of the microwave field is converted into heat energy in the medium, so that the temperature of the material is raised, and a series of physical and chemical processes such as thermalization, puffing and the like are generated to achieve the aim of microwave heating.

The microwave heating has the following advantages: the heating time is short; the heat energy utilization rate is high, and energy is saved; heating uniformly; the microwave source is easy to control, and the microwave can also induce the catalytic reaction.

The microwave is generated by a microwave source, which is mainly composed of a high-power magnetron. The magnetron is a device which completes energy conversion by utilizing the movement of electrons in vacuum and can generate high-power microwave energy, for example, a 4250MHz magnetic wave tube can obtain 5MHz, and a 4250MHz klystron can obtain 30MHz, so that the microwave technology can be applied to the technical field of wastewater treatment.

Further, the condenser 4 is also connected with MW-LEP waste gas treatment equipment, and a metal net is arranged at the inlet and outlet positions of the waste gas treatment equipment; wherein, the aperture of the mesh of the metal net is less than or equal to 3mm; when the human body is very close to the microwave radiation source for a long time, the phenomena of dizziness, sleep disorder, hypomnesis, bradycardia, blood pressure reduction and the like are caused by excessive radiation energy. When the microwave leakage reaches 1mw/cm2, the eyes suddenly feel dazzled, the vision is degraded, and even cataract is caused. In order to ensure the health of users, metal plates are arranged at the inlet and the outlet of the reaction cavity, and the corners can generate microwave discharge under the action of microwaves, so that dangerous accidents are easy to happen. The metal plate can block microwave leakage, reduce the damage of microwave to human body and improve the safety of the system.

The embodiment discloses a dirty oil sludge treatment device, which comprises: the pretreatment device comprises a preprocessor 1, a metal cavity 2, a microwave source 3, a condenser 4 and a sieving device 5; wherein, the preprocessor 1 comprises a drying area 11 and a grinder 12; the preprocessor 1 is connected with the metal cavity 2 in a body mode; the microwave source 3 is arranged outside the metal cavity 2; the condenser 4 is connected with the gas outlet of the metal cavity 2, and the discharge hole of the metal cavity 2 is connected with the sieving device 5. Namely, the invention realizes the high-efficiency treatment of various dirty oil sludge, no secondary pollution, higher oil recovery rate, energy conservation and energy consumption reduction by implementing the processes of drying, crushing, microwave cracking, condensation recovery and the like of the dirty oil sludge.

Fig. 3 is a schematic diagram of a method and apparatus for processing contaminated oil sludge according to another embodiment of the present invention, which is integrated in a terminal device or a chip of the terminal device.

The device includes: memory 301, processor 302.

The memory 301 is used for storing programs, and the processor 302 calls the programs stored in the memory 301 to execute the above-mentioned method embodiments of the sludge treatment method. The specific implementation and technical effects are similar, and are not described herein again.

Preferably, the present invention also provides a program product, such as a computer-readable storage medium, comprising a program which, when being executed by a processor, is adapted to carry out the above-mentioned method embodiments.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Claims

1. A process for treating contaminated oil sludge, said process comprising:

2. A sludge process according to claim 1 wherein the wave absorbing particles comprise at least one of silicon carbide, graphite and metal oxide.

3. The process of claim 1, wherein the pyrolysis gas is condensed and recovered, and the pyrolysis residue is sieved, and then the process further comprises:

controlling a target power of the microwave source based on the gas parameter.

4. The sludge treatment process according to claim 3, wherein the particulate matter is filled with nitrogen gas, and wave-absorbing particles are added to carry out microwave pyrolysis, and further comprising;

obtaining the content of the particulate matter;

5. A contaminated sludge treatment process according to claim 4, wherein said determining an amount of nitrogen charge based on the content of said particulate matter, further comprises:

acquiring the content of oxygen;