Oily sludge treatment system

Abstract

The utility model relates to an oil-containing sludge treatment system, which comprises a feeding unit provided with a first waste material outlet, a first heat cycle inlet and a first heat cycle outlet; the desorption sedimentation unit is provided with a second waste material inlet, a waste gas outlet, a second heat cycle inlet and a second heat cycle outlet, the second waste material inlet is communicated with the first waste material outlet, and the second heat cycle outlet is communicated with the first heat cycle inlet; the heat dissipation unit is provided with a first heat dissipation inlet, a second heat dissipation inlet and a first heat dissipation outlet, the first heat dissipation inlet is communicated with the second heat circulation outlet, the second heat dissipation inlet is communicated with the first heat circulation outlet, and the first heat dissipation outlet is communicated with the second heat circulation inlet; a waste gas inlet of the tail gas treatment unit is communicated with the waste gas outlet, a third heat cycle inlet is communicated with the second heat cycle outlet, and a third heat cycle outlet is communicated with the second heat dissipation inlet. According to the technical scheme, the technical problems that a traditional oil-containing sludge treatment system is high in operation cost and energy consumption are effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of oily sludge treatment, and in particular to an oily sludge treatment system. Background Art

[0002] Oil-based drilling fluid is mainly based on diesel or white oil, supplemented by emulsifiers, stabilizers, filtration reducers and other additives. In the large-scale exploration and development of resources such as oil, natural gas, and shale gas, oil-based drilling fluid is widely used in drilling operations such as high clay content, easy collapse oil and gas layers, high temperature and high pressure deep wells, high-angle directional wells or horizontal wells due to its advantages such as good viscosity stability, strong heat resistance, strong shale inhibition ability, good anti-pollution ability, good lubricity, and fast mechanical drilling speed. However, during the drilling operation, the use of oil-based drilling fluid will be accompanied by a large amount of oil-containing drill cuttings, that is, the generation of oily sludge. The oily sludge contains complex components such as oil, clay, various chemical treatment agents, weighting materials, dirty oil, sewage, and heavy metal ions. It has the characteristics of high oil content and many organic pollutants, and is a hazardous waste. If improperly handled, it will cause serious pollution to the environment. Therefore, it is necessary to treat the oily sludge.

[0003] In the related art, oily sludge is generally treated by thermal desorption technology. That is, after the oily sludge is treated by the thermal desorption device, it is cooled by the condensation device, the solid obtained is separated by sedimentation through the sedimentation separation unit, and the gas obtained is treated by the tail gas treatment unit. Since the tail gas entering the tail gas treatment device will pass through the condensation device, there is a low tail gas temperature, and it is usually necessary to add an additional heating element to heat the tail gas to ensure that the tail gas treatment device can process the tail gas to obtain the standard. This not only increases the operating cost of the thermal desorption treatment system, but also causes heat energy waste at the tail gas treatment device. Utility Model Content

[0004] The present application provides an oily sludge treatment system to solve the technical problems of high operating cost and energy consumption of traditional oily sludge treatment systems.

[0005] To this end, an embodiment of the present application provides an oily sludge treatment system, which includes: a feeding unit, having a first waste outlet, a first heat cycle inlet and a first heat cycle outlet; a desorption sedimentation unit, having a second waste inlet, a waste gas outlet, a second heat cycle inlet and a second heat cycle outlet, the second waste inlet is connected to the first waste outlet, and the second heat cycle outlet is connected to the first heat cycle inlet; a heat dissipation unit, having a first heat dissipation inlet, a second heat dissipation inlet and a first heat dissipation outlet, the first heat dissipation inlet is connected to the second heat cycle outlet, the second heat dissipation inlet is connected to the first heat cycle outlet, and the first heat dissipation outlet is connected to the second heat cycle inlet; and an exhaust gas treatment unit, having a waste gas inlet, a third heat cycle inlet and a third heat cycle outlet, the waste gas inlet is connected to the waste gas outlet, the third heat cycle inlet is connected to the second heat cycle outlet, and the third heat cycle outlet is connected to the second heat dissipation inlet.

[0006] In a possible implementation, the system further includes a first pipeline, a first valve body disposed on the first pipeline, a second pipeline, and a second valve body disposed on the second pipeline, wherein the radial dimension of the second pipeline is smaller than or equal to the radial dimension of the first pipeline, the first valve body is used to connect or disconnect the first pipeline, and the second valve body is used to connect or disconnect the second pipeline; the second heat cycle outlet is connected to the first heat cycle inlet through the first pipeline, and the second heat cycle outlet is connected to the third heat cycle inlet through the second pipeline.

[0007] In a possible implementation, the tail gas treatment unit includes a heat exchange device and an activated carbon device that are connected to each other, and the exhaust gas inlet, the third heat cycle inlet and the third heat cycle outlet are all arranged in the heat exchange device.

[0008] In one possible embodiment, the operating temperature of the activated carbon device is 20° C. to 40° C.; and / or,

[0009] The exhaust gas velocity in the activated carbon device is 0.8m / s~1.2m / s.

[0010] In a possible embodiment, the exhaust gas treatment unit further includes a first spray device and a second spray device which are arranged in sequence, the first spray device is connected to the activated carbon device, the first agent is sprayed in the first spray device, and the second agent is sprayed in the second spray device.

[0011] In a possible implementation, the tail gas treatment unit further includes a suction device, and the suction device is disposed between the desorption and sedimentation unit and the heat exchange device.

[0012] In a possible embodiment, the feeding unit includes a hopper, a heater and a conveying pump. The heater is arranged on the outside of the hopper. The conveying pump is used to pump the waste in the hopper into the desorption sedimentation unit. The first heat cycle inlet and the first heat cycle outlet are both arranged on the heater.

[0013] In a possible implementation, the feeding unit further includes a first material level meter and a second material level meter disposed on the hopper, and the first material level meter is located above the second material level meter.

[0014] In a possible embodiment, the desorption and sedimentation unit includes a thermal desorption device, a condensation device and a sedimentation and separation device arranged in sequence, the second waste inlet is arranged in the thermal desorption device, the waste gas outlet and the second heat cycle inlet are arranged in the condensation device, and the second heat cycle outlet is arranged in the sedimentation and separation device.

[0015] In a possible embodiment, the heat dissipation unit also includes a second heat dissipation outlet, and the desorption sedimentation unit also includes a discharge device, which is connected to the outlet of the thermal desorption device and is used to transport the solid waste generated by the thermal desorption device. The discharge device has a fourth thermal cycle inlet and a fourth thermal cycle outlet, and the fourth thermal cycle inlet is connected to the second heat dissipation outlet, and the fourth thermal cycle outlet is connected to the first thermal cycle inlet.

[0016] According to the oily sludge treatment system provided in the embodiment of the present application, it includes: a feeding unit, having a first waste outlet, a first heat cycle inlet and a first heat cycle outlet; a desorption sedimentation unit, having a second waste inlet, a waste gas outlet, a second heat cycle inlet and a second heat cycle outlet, the second waste inlet is connected to the first waste outlet, and the second heat cycle outlet is connected to the first heat cycle inlet; a heat dissipation unit, having a first heat dissipation inlet, a second heat dissipation inlet and a first heat dissipation outlet, the first heat dissipation inlet is connected to the second heat cycle outlet, the second heat dissipation inlet is connected to the first heat cycle outlet, and the first heat dissipation outlet is connected to the second heat cycle inlet; and an exhaust gas treatment unit, having a waste gas inlet, a third heat cycle inlet and a third heat cycle outlet, the waste gas inlet is connected to the waste gas outlet, the third heat cycle inlet is connected to the second heat cycle outlet, and the third heat cycle outlet is connected to the second heat dissipation inlet. The technical solution of the present application transfers the waste heat in the desorption and sedimentation unit to the feed unit, so as to utilize the system waste heat to heat the oily sludge in the feed unit, thereby effectively shortening the treatment time of the oily sludge in the desorption and sedimentation unit, improving the treatment efficiency of the oily sludge, and reducing the operating cost of the oily sludge treatment system; at the same time, the waste heat in the desorption and sedimentation unit is transferred to the exhaust gas treatment unit, so as to utilize the system waste heat to heat the exhaust gas in the exhaust gas treatment unit, so that the exhaust gas treatment unit is in the optimal treatment temperature range, thereby improving the exhaust gas treatment effect; in addition, increasing the exhaust gas temperature and changing the exhaust gas from a saturated state to an unsaturated state can effectively prevent the exhaust gas from condensing in the exhaust gas treatment unit, thereby extending the service life of the exhaust gas treatment unit. Compared with the traditional thermal desorption treatment system, which requires separately arranging heating elements at the feed unit and the tail gas treatment unit to preheat the oily sludge and the tail gas respectively, the present embodiment transmits the waste heat generated in the system to the feed unit and the tail gas treatment unit respectively, so as to simultaneously realize the preheating of the oily sludge and the tail gas, rationally utilizes the waste heat generated in the system, effectively solves the problem of high energy consumption of the oily sludge treatment system, reduces the operating cost of the whole system, and the whole system has a simple structure, compact layout, and excellent oily sludge treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments that conform to the present application, and are used together with the specification to explain the principles of the present application. In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can also be obtained based on these drawings without paying creative labor. One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute a proportional limitation.

[0018] Figure 1 A schematic diagram of the structure of an oily sludge treatment system provided in an embodiment of the present application.

[0019] Description of reference numerals:

[0020] 100, feeding unit; 101, first waste outlet; 102, first heat cycle inlet; 103, first heat cycle outlet; 110, hopper; 120, heating element; 130, delivery pump; 140, first material level meter; 150, second material level meter;

[0021] 200, desorption and sedimentation unit; 201, second waste inlet; 202, waste gas outlet; 203, second thermal cycle inlet; 204, second thermal cycle outlet; 210, thermal desorption device; 220, condensation device; 230, sedimentation and separation device; 240, discharge device; 241, fourth thermal cycle inlet; 242, fourth thermal cycle outlet;

[0022] 300, heat dissipation unit; 301, first heat dissipation inlet; 302, second heat dissipation inlet; 303, first heat dissipation outlet; 304, second heat dissipation outlet;

[0023] 400, tail gas treatment unit; 401, exhaust gas inlet; 402, third heat cycle inlet; 403, third heat cycle outlet; 410, heat exchange device; 420, activated carbon device; 430, first spray device; 440, second spray device; 450, suction device;

[0024] 510, first pipeline; 520, first valve body; 530, second pipeline; 540, second valve body;

[0025] 600. Control unit. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the various specific processes and examples of materials provided by the present application, but those of ordinary skill in the art can appreciate the applicability of other processes and / or the use of other materials.

[0028] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0029] See also Figure 1The embodiment of the present application provides an oily sludge treatment system, which includes: a feeding unit 100, having a first waste outlet 101, a first heat cycle inlet 102 and a first heat cycle outlet 103; a desorption sedimentation unit 200, having a second waste inlet 201, a waste gas outlet 202, a second heat cycle inlet 203 and a second heat cycle outlet 204, the second waste inlet 201 is connected to the first waste outlet 101, and the second heat cycle outlet 204 is connected to the first heat cycle inlet 102; a heat dissipation unit 300, having a first heat dissipation inlet 301, a second heat dissipation inlet 303 and a second heat cycle outlet 204. 02 and the first heat dissipation outlet 303, the first heat dissipation inlet 301 is connected with the second heat circulation outlet 204, the second heat dissipation inlet 302 is connected with the first heat circulation outlet 103, and the first heat dissipation outlet 303 is connected with the second heat circulation inlet 203; and the exhaust gas treatment unit 400, having a waste gas inlet 401, a third heat circulation inlet 402 and a third heat circulation outlet 403, the waste gas inlet 401 is connected with the waste gas outlet 202, the third heat circulation inlet 402 is connected with the second heat circulation outlet 204, and the third heat circulation outlet 403 is connected with the second heat dissipation inlet 302.

[0030] In this embodiment, the waste heat in the desorption and sedimentation unit 200 is transferred to the feeding unit 100 to utilize the system waste heat to heat the oily sludge in the feeding unit 100, which effectively shortens the treatment time of the oily sludge in the desorption and sedimentation unit 200, improves the treatment efficiency of the oily sludge, and reduces the operating cost of the oily sludge treatment system; at the same time, the waste heat in the desorption and sedimentation unit 200 is transferred to the exhaust gas treatment unit 400 to utilize the system waste heat to heat the exhaust gas in the exhaust gas treatment unit 400, so that the exhaust gas treatment unit 400 is in the optimal treatment temperature range, thereby improving the exhaust gas treatment effect; in addition, increasing the exhaust gas temperature and changing the exhaust gas from a saturated state to an unsaturated state can effectively prevent the exhaust gas from condensing in the exhaust gas treatment unit 400, thereby extending the service life of the exhaust gas treatment unit 400.

[0031] Compared with the traditional thermal desorption treatment system, which requires the heating elements to be arranged separately at the feed unit 100 and the tail gas treatment unit 400 to preheat the oily sludge and tail gas respectively, the present embodiment transmits the waste heat generated in the system to the feed unit 100 and the tail gas treatment unit 400 respectively, so as to preheat the oily sludge and tail gas at the same time, and reasonably utilizes the waste heat generated in the system, effectively solving the problem of high energy consumption of the oily sludge treatment system and the problem of tail gas treatment failure caused by the tail gas temperature being too low and solidifying in the tail gas treatment unit 400, thereby ensuring the tail gas treatment effect and reducing the operating cost of the system. In addition, the entire oily sludge treatment system has a simple structure, compact layout, and excellent oily sludge treatment effect.

[0032] Specifically, the oily sludge treatment system is configured as a combination component that includes at least a feeding unit 100, a desorption and sedimentation unit 200, a heat dissipation unit 300 and an exhaust gas treatment unit 400. The feeding unit 100 may be a bucket-shaped structure, which is used to hold the oily sludge; the top of the feeding unit 100 may be an open end, and the open end is a large-sized end, so that a conveying machine or an engineering machine can deliver the oily sludge from the open end into the feeding unit 100; the bottom of the feeding unit 100 is a small-sized end, on which a valve is arranged. When the valve is opened, the oily sludge in the feeding unit 100 can be transferred to the desorption and sedimentation unit 200 through the pump body, and when the valve is closed, the transfer of the oily sludge can be blocked. According to the principle that different substances have different boiling points, the desorption sedimentation unit 200 is used to provide different desorption temperatures for oily sludge with complex components, so as to achieve the desorption of different components in the oily sludge, obtain high-temperature gas phase components and high-temperature solid phase components, and thus achieve the treatment of the oily sludge; the high-temperature gas phase components obtained by treatment are separated from oil and water after condensation and sedimentation, and the oil phase can be recycled; the high-temperature solid phase components obtained by treatment are recycled after cooling. The heat dissipation unit 300 can be an open / closed cooling water tower, which is mainly used to provide cooling capacity for high-temperature gas phase components and high-temperature solid phase components, to obtain the oil phase in the high-temperature gas phase components by condensation and sedimentation separation, and to obtain the low-temperature solid phase components by cooling. The tail gas treatment unit 400 is used to adsorb or absorb harmful components in tail gas such as impurities in the feeding unit 100 / desorption sedimentation unit 200, etc., and waste gas generated during the desorption process, so that the treated gas meets the emission standards, avoids tail gas pollution of the environment, and provides an environmentally friendly oily sludge treatment system.

[0033] In a possible implementation, the first pipeline 510, a first valve body 520 disposed on the first pipeline 510, a second pipeline 530 and a second valve body 540 disposed on the second pipeline 530 are further included. The radial dimension of the second pipeline 530 is smaller than or equal to the radial dimension of the first pipeline 510. The first valve body 520 is used to connect or disconnect the first pipeline 510, and the second valve body 540 is used to connect or disconnect the second pipeline 530. The second thermal cycle outlet 204 is connected to the first thermal cycle inlet 102 through the first pipeline 510, and the second thermal cycle outlet 204 is connected to the third thermal cycle inlet 402 through the second pipeline 530.

[0034] In this embodiment, the oily sludge treatment system is configured as a combination component including at least a feeding unit 100, a desorption and sedimentation unit 200, a heat dissipation unit 300, an exhaust gas treatment unit 400, a first pipeline 510, a first valve body 520, a second pipeline 530 and a second valve body 540. The first pipeline 510 can be a metal circular tube, which is arranged between the second heat cycle outlet 204 of the desorption and sedimentation unit 200 and the first heat cycle inlet 102 of the feeding unit 100, and is used to pass the high-temperature circulating water flowing out of the second heat cycle outlet 204 into the first heat cycle inlet 102, and exchange heat with the oily sludge placed therein at the feeding unit 100. The temperature of the oily sludge after the heat exchange increases to achieve preheating, and the temperature of the circulating water after the heat exchange decreases, and flows out of the feeding unit 100 from the first heat cycle outlet 103, so as to achieve the first utilization of the system waste heat. The second pipe 530 can be a metal circular pipe, which is arranged between the second heat cycle outlet 204 of the desorption sedimentation unit 200 and the third heat cycle inlet 402 of the exhaust gas treatment unit 400, and is used to pass the high-temperature circulating water flowing out from the second heat cycle outlet 204 into the third heat cycle inlet 402, and exchange heat with the exhaust gas passing through it in the exhaust gas treatment unit 400. The temperature of the exhaust gas after the heat exchange increases to achieve preheating, and the temperature of the circulating water after the heat exchange decreases, and it flows out of the exhaust gas treatment unit 400 from the third heat cycle outlet 403, so as to achieve the second utilization of the system waste heat.

[0035] The first valve body 520 may be a solenoid valve, which is disposed on the first pipe 510 and can be used to open and close the first pipe 510 to adjust the flow direction and flow rate of the high-temperature circulating water flowing out of the second heat cycle outlet 204, and the operator can adjust the volume of the high-temperature circulating water entering the first heat cycle inlet 102 according to actual needs. The second valve body 540 may be a solenoid valve, which is disposed on the second pipe 530 and can be used to open and close the second pipe 530 to adjust the flow direction and flow rate of the high-temperature circulating water flowing out of the second heat cycle outlet 204, and the operator can adjust the volume of the high-temperature circulating water entering the third heat cycle inlet 402 according to actual needs. For example, the operator can close the first valve body 520 and open the second valve body 540 at the same time, so that the high-temperature circulating water can enter the exhaust gas treatment unit 400, thereby achieving rapid preheating of the exhaust gas; or, the second valve body 540 can be closed and the first valve body 520 can be opened at the same time, so that the high-temperature circulating water can enter the feeding unit 100, thereby achieving rapid preheating of the oily sludge; or, the first valve body 520 and the second valve body 540 can be opened at the same time, and the flow rate of the high-temperature circulating water in the first pipeline 510 and the second pipeline 530 can be adjusted by the degree of opening of the first valve body 520 and the second valve body 540.

[0036] In addition, the radial dimension of the first pipeline 510 can be larger than the radial dimension of the second pipeline 530. At this time, the first valve body 520 and the second valve body 540 can be in a fully open state, and most of the high-temperature circulating water is diverted to the feed unit 100 to heat the oily sludge, so as to achieve rapid heating of the oily sludge. At the same time, a small part of the high-temperature circulating water is diverted to the tail gas treatment unit 400 to heat the tail gas, so as to ensure that the tail gas treatment device is at the optimal treatment temperature. Alternatively, the radial dimension of the first pipeline 510 can be the same as the radial dimension of the second pipeline 530. At this time, the amount of high-temperature circulating water in the two pipelines needs to be adjusted by the opening size of the first valve body 520 and the second valve body 540, so as to control the amount of heat entering the feed unit 100 and the tail gas treatment unit 400, and achieve a reasonable distribution of the system waste heat. In this way, the effective utilization rate of the system waste heat can be improved.

[0037] In a possible implementation, the tail gas treatment unit 400 includes a heat exchange device 410 and an activated carbon device 420 that are connected to each other, and the exhaust gas inlet 401 , the third heat cycle inlet 402 , and the third heat cycle outlet 403 are all disposed in the heat exchange device 410 .

[0038] In this embodiment, the specific configuration of the tail gas treatment unit 400 is optimized. Specifically, the tail gas treatment unit 400 is configured as a combined component including at least a heat exchange device 410 and an activated carbon device 420. The heat exchange device 410 can be a plate heat exchanger or a tube heat exchanger, which is used to achieve heat exchange between high-temperature circulating water and tail gas; it is provided with a waste gas inlet 401, a hot gas outlet connected to the waste gas inlet 401, a third heat cycle inlet 402, and a third heat cycle outlet 403 connected to the third heat cycle inlet 402. The high-temperature circulating water enters the heat exchange device 410 from the third heat cycle inlet 402 and flows out of the heat exchange device 410 from the third heat cycle outlet 403. The tail gas enters the heat exchange device 410 from the waste gas inlet 401 and flows out of the heat exchange device 410 from the hot gas outlet and enters the activated carbon device 420. After heat exchange in the heat exchange device 410, low-temperature circulating water and high-temperature tail gas can be obtained. The activated carbon device 420 is filled with square or columnar activated carbon, which is used to absorb harmful substances in high-temperature exhaust gas to achieve primary treatment of exhaust gas. In this way, the heated exhaust gas is passed into the activated carbon device 420 for exhaust gas treatment, which can avoid the low-temperature exhaust gas condensing in the activated carbon device 420 and causing the activated carbon to fail, ensuring that the activated carbon device 420 is at a suitable exhaust gas treatment temperature and improving the exhaust gas treatment effect.

[0039] For example, the temperature of the high-temperature circulating water entering from the third heat cycle inlet 402 may be 60°C, and the temperature of the low-temperature tail gas entering from the exhaust gas inlet 401 may be about 0-5°C. After heat exchange by the heat exchange device 410, the temperature of the circulating water drops to about 40°C, and the temperature of the tail gas rises to about 20°C. After the temperature rises, the water / oil and other substances in the tail gas change from a low-temperature saturated state to a high-temperature unsaturated state, which can effectively prevent the condensation of water / oil and other substances in the activated carbon and cause the activated carbon to fail, thereby extending the service life of the activated carbon.

[0040] In a possible implementation, the operating temperature of the activated carbon device 420 is 20°C to 40°C; and / or, the exhaust gas flow rate in the activated carbon device 420 is 0.8m / s to 1.2m / s. Such a setting can not only avoid the operating temperature of the activated carbon device 420 being too low, which may cause the low-temperature oil phase / low-temperature water phase to condense therein, thereby causing the activated carbon to fail; but also avoid the waste of heat energy, so that the activated carbon device 420 is at a suitable exhaust gas treatment temperature, improve the adsorption and removal of harmful substances in the exhaust gas, and improve the exhaust gas treatment effect. At the same time, controlling the exhaust gas flow rate in the activated carbon device 420 to be within a suitable range can not only avoid the exhaust gas treatment efficiency being too low due to the flow rate being too low, the pressure in the device being too high due to the accumulation of exhaust gas in the exhaust gas treatment device, and the occurrence of safety accidents such as explosions; but also avoid the problem of unclean exhaust gas treatment due to the exhaust gas flow rate being too high, and improve the adsorption and cleaning effect of harmful substances in the exhaust gas. For example but not limited to, the operating temperature of the activated carbon device 420 may be 20° C., and the exhaust gas flow rate therein may be 1 m / s.

[0041] In a possible embodiment, the exhaust gas treatment unit 400 also includes a first spray device 430 and a second spray device 440 arranged in sequence, the first spray device 430 is connected to the activated carbon device 420, the first spray device 430 sprays the first agent, and the second spray device 440 sprays the second agent.

[0042] In this embodiment, the specific configuration of the tail gas treatment unit 400 is further optimized. Specifically, the tail gas treatment unit 400 is configured as a combination component including at least a heat exchange device 410, an activated carbon device 420, a first spray device 430 and a second spray device 440. The first spray device 430 can be configured to include at least a spray tower body, a bottom liquid storage tank, a spray liquid circulation pump, a nozzle configured at the top of the tower, and a filler filled in the tower body, etc. The tail gas treated by the activated carbon device 420 enters the tower from the inlet of the spray tower, and the spray liquid circulation pump pumps the spray liquid containing the first agent in the bottom liquid storage tank to the nozzle at the top of the tower, and sprays it to the tail gas in the tower through the nozzle to further absorb harmful substances in the tail gas; the tail gas after spraying overflows from the top of the tower and then enters the second spray device 440. The structure of the second spray device 440 may be the same as that of the first spray device 430 , but the second agent configured in the second spray device 440 is of a different type from the first agent configured in the first spray device 430 to achieve absorption of different harmful components in the exhaust gas.

[0043] In addition, the tail gas outlet on the second spray device 440 is connected to the chimney, and the height of the chimney can be flexibly selected according to local requirements. Generally speaking, the height of the chimney is not less than 15 meters.

[0044] In a possible implementation, the tail gas treatment unit 400 further includes a suction device 450 , which is disposed between the desorption and sedimentation unit 200 and the heat exchange device 410 .

[0045] In this embodiment, the specific configuration of the tail gas treatment unit 400 is further optimized. Specifically, the tail gas treatment unit 400 is configured as a combination component including at least a heat exchange device 410, an activated carbon device 420, a first spray device 430, a second spray device 440 and a suction device 450. The suction device 450 can be configured as a composite component including at least a fan, a vacuum pump / vacuum pump group and valves, which is used to realize the suction of the high-temperature gas phase in the desorption sedimentation unit 200 and keep the front components of the fan in a negative pressure state. The air inlet of the fan is connected to the exhaust gas outlet 202 of the desorption sedimentation unit 200, and the air outlet of the fan is connected to the exhaust gas inlet 401 of the heat exchange device 410. In this way, the tail gas in the process of thermal desorption of oily sludge is sucked into the heat exchange device 410 for heat exchange, and then the heated tail gas is sent to the activated carbon device 420 for adsorption of harmful substances to achieve the treatment of the tail gas.

[0046] In a possible embodiment, the feeding unit 100 includes a hopper 110, a heating element 120 and a conveying pump 130. The heating element 120 is arranged on the outside of the hopper 110. The conveying pump 130 is used to pump the waste in the hopper 110 into the desorption sedimentation unit 200. The first heat cycle inlet 102 and the first heat cycle outlet 103 are both arranged on the heating element 120.

[0047] In this embodiment, the specific configuration of the feed unit 100 is optimized. Specifically, the feed unit 100 is configured as a composite component including at least a hopper 110, a heating element 120 and a delivery pump 130. The upper end of the hopper 110 is an open end with a relatively large size, which is convenient for a conveying machine or an engineering machine to deliver the oily sludge from the open end into the hopper 110; the lower end of the hopper 110 is a valve end with a relatively small size, and the valve can be a solenoid valve. When the valve is opened, the oily sludge in the hopper 110 can be delivered to the desorption sedimentation unit 200 through the delivery pump 130, and when the valve is closed, the delivery of the oily sludge can be blocked. The heating element 120 may be a heating coil, which is spirally arranged on the outer peripheral side of the hopper 110, and is used to perform heat exchange with the oily sludge in the hopper 110 to achieve preheating treatment of the oily sludge; the first heat cycle inlet 102 arranged on the heating element 120 may be located at the upper end of the hopper 110, and the first heat cycle outlet 103 may be located at the lower end of the hopper 110, so that the oily sludge in the hopper 110 can transfer heat evenly. The delivery pump 130 is arranged below the valve of the hopper 110; after the oily sludge is loaded and the valve is opened, the delivery pump 130 can be started to pump the oily sludge into the desorption sedimentation unit 200. Through the feeding unit 100, the oily sludge can be quickly delivered to the desorption sedimentation unit 200 to avoid the oily sludge from being blocked in the hopper 110, and the overall delivery efficiency and delivery accuracy are high.

[0048] Generally speaking, the temperature of the oily sludge entering the hopper 110 is 0°C to 20°C, and the temperature rises to about 50°C after being heated by the heating element 120. The temperature of the high-temperature circulating water entering the heating element 120 is about 60°C, and the temperature drops to about 30°C after heat exchange by the heating element 120; the cooled circulating water continues to cool to about 5°C through the heat dissipation unit 300, and returns to the desorption sedimentation unit 200 to provide cooling for the high-temperature gas phase substances obtained by desorption, and the cycle continues.

[0049] In one example, a stirring paddle is further provided in the hopper 110 for stirring the oily sludge to prevent the oily sludge from being deposited in the hopper 110 and blocking the first waste outlet 101 of the hopper 110 .

[0050] In a possible implementation, the feeding unit 100 further includes a first material level meter 140 and a second material level meter 150 disposed on the hopper 110 , and the first material level meter 140 is located above the second material level meter 150 .

[0051] In this embodiment, the specific configuration of the feeding unit 100 is further optimized. Specifically, the feeding unit 100 is configured as a combination of at least a hopper 110, a heating element 120, a delivery pump 130, a first level meter 140, and a second level meter 150. The first level meter 140 can be a liquid level sensor, which is configured on the inner wall of the upper end of the hopper 110, and is used to detect the liquid level of the oily sludge at the upper end of the hopper 110 to avoid excessive oily sludge and overflowing the hopper 110 to cause environmental pollution; the second level meter 150 can be a liquid level sensor, which is configured on the inner wall of the lower end of the hopper 110, and is used to detect the liquid level of the oily sludge at the lower end of the hopper 110 to avoid insufficient oily sludge in the hopper 110 and the empty delivery pump 130. Through the first level meter 140 and the second level meter 150, the oily sludge in the hopper 110 can be controlled at an appropriate volume to ensure the normal operation of the feeding unit 100.

[0052] In a possible embodiment, the desorption sedimentation unit 200 includes a thermal desorption device 210, a condensation device 220 and a sedimentation separation device 230 which are arranged in sequence, the second waste inlet 201 is arranged in the thermal desorption device 210, the waste gas outlet 202 and the second heat cycle inlet 203 are arranged in the condensation device 220, and the second heat cycle outlet 204 is arranged in the sedimentation separation device 230.

[0053] In this embodiment, the specific configuration of the desorption sedimentation unit 200 is optimized. Specifically, the desorption sedimentation unit 200 is configured as a combined component including at least a thermal desorption device 210, a condensation device 220 and a sedimentation separation device 230. The thermal desorption device 210 can be a thermal desorption tower, which is used to further heat the oily sludge pumped from the feed unit 100, so that the temperature of the oily sludge is increased to reach the boiling point of each component, thereby realizing the volatilization and desorption of each component; it can be in a negative pressure state under the action of the suction device 450 or the vacuum pump configured by itself, so as to avoid the high-temperature gas generated during the desorption process from accumulating inside it and causing safety accidents such as explosions. The condensation device 220 can be configured as a composite component including at least a spray tower and a spray assembly, which is used to condense and process the high-temperature gas phase transmitted from the thermal desorption device 210; the condensed oil-water mixture enters the sedimentation separation device 230, and the tail gas flows out from the top of the spray tower and enters the tail gas treatment unit 400. The sedimentation separation device 230 can be a sedimentation tower, which is used to separate oil and water from the low-temperature liquid phase obtained by condensation and cooling from the condensation device 220; since the densities of oil and water are different, the separated oil phase can be recovered according to the density difference between the two. At the same time, the separated water phase is cooled by the heat dissipation unit 300 and then continued to be introduced into the condensation device 220 to condense the high-temperature gas phase, and the cycle is repeated.

[0054] In a possible embodiment, the heat dissipation unit 300 also includes a second heat dissipation outlet 304, and the desorption sedimentation unit 200 also includes a discharge device 240, which is connected to the outlet of the thermal desorption device 210 and is used to transport the solid waste generated by the thermal desorption device 210. The discharge device 240 has a fourth thermal cycle inlet 241 and a fourth thermal cycle outlet 242, and the fourth thermal cycle inlet 241 is connected to the second heat dissipation outlet 304, and the fourth thermal cycle outlet 242 is connected to the first thermal cycle inlet 102.

[0055] In this embodiment, the specific configuration of the oily sludge treatment system is further optimized. Specifically, the desorption sedimentation unit 200 is configured as a combination of at least a thermal desorption device 210, a condensation device 220, a sedimentation separation device 230 and a discharge device 240. The discharge device 240 can be a conveyor belt, which is mainly used to achieve the cooling and transportation of high-temperature solid waste residue. The solid waste is discharged from the waste outlet of the thermal desorption device 210 and enters the discharge device 240; the fourth heat cycle inlet 241 arranged on the discharge device 240 is connected to the second heat dissipation outlet 304 of the heat dissipation unit 300, and the fourth heat cycle outlet 242 is connected to the first heat cycle inlet 102 on the feeding unit 100. In this way, the heat dissipation unit 300 can provide a cold source to the discharge device 240 to cool the solid waste. The cooled solid waste is sent to a designated location for collection and treatment through a conveyor belt; at the same time, the waste heat at the solid waste is transported to the feeding unit 100 to preheat the oily sludge, further improve the waste heat utilization efficiency of the oily sludge treatment system, and reduce costs and increase efficiency.

[0056] In one example, the oily sludge treatment system also includes a control unit 600, which is electrically connected to the feed unit 100, the desorption and sedimentation unit 200, the heat dissipation unit 300, and the exhaust gas treatment unit 400, respectively, and is used to realize power distribution of each unit, instrument parameter collection and feedback, and program control, etc., thereby realizing intelligent operation of the oily sludge treatment system and reducing labor costs and management costs.

[0057] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0058] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0059] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An oily sludge treatment system, characterized in that: include: A feed unit having a first waste outlet, a first heat cycle inlet and a first heat cycle outlet; a desorption and settling unit having a second waste inlet, a waste gas outlet, a second heat cycle inlet and a second heat cycle outlet, wherein the second waste inlet is connected to the first waste outlet, and the second heat cycle outlet is connected to the first heat cycle inlet; a heat dissipation unit having a first heat dissipation inlet, a second heat dissipation inlet, and a first heat dissipation outlet, wherein the first heat dissipation inlet is connected to the second heat circulation outlet, the second heat dissipation inlet is connected to the first heat circulation outlet, and the first heat dissipation outlet is connected to the second heat circulation inlet; and The tail gas treatment unit has a waste gas inlet, a third heat cycle inlet and a third heat cycle outlet, the waste gas inlet is connected to the waste gas outlet, the third heat cycle inlet is connected to the second heat cycle outlet, and the third heat cycle outlet is connected to the second heat dissipation inlet.

2. The oily sludge treatment system according to claim 1, characterized in that: It also includes a first pipeline, a first valve body arranged on the first pipeline, a second pipeline and a second valve body arranged on the second pipeline, the radial size of the second pipeline is smaller than or equal to the radial size of the first pipeline, the first valve body is used to connect or disconnect the first pipeline, and the second valve body is used to connect or disconnect the second pipeline; the second heat cycle outlet is connected to the first heat cycle inlet through the first pipeline, and the second heat cycle outlet is connected to the third heat cycle inlet through the second pipeline.

3. The oily sludge treatment system according to claim 1, characterized in that: The tail gas treatment unit comprises a heat exchange device and an activated carbon device which are connected to each other. The exhaust gas inlet, the third heat cycle inlet and the third heat cycle outlet are all arranged on the heat exchange device.

4. The oily sludge treatment system according to claim 3, characterized in that: The operating temperature of the activated carbon device is 20°C to 40°C; and / or, The tail gas flow rate in the activated carbon device is 0.8 m / s to 1.2 m / s.

5. The oily sludge treatment system according to claim 3, characterized in that: The tail gas treatment unit further includes a first spray device and a second spray device which are arranged in sequence, wherein the first spray device is connected to the activated carbon device, the first spray device sprays a first agent, and the second spray device sprays a second agent.

6. The oily sludge treatment system according to claim 5, characterized in that: The tail gas treatment unit further comprises a suction device, and the suction device is arranged between the desorption and sedimentation unit and the heat exchange device.

7. The oily sludge treatment system according to claim 1, characterized in that: The feeding unit includes a hopper, a heating element and a conveying pump. The heating element is arranged on the outside of the hopper. The conveying pump is used to pump the waste in the hopper into the desorption sedimentation unit. The first heat cycle inlet and the first heat cycle outlet are both arranged on the heating element.

8. The oily sludge treatment system according to claim 7, characterized in that: The feeding unit further includes a first material level meter and a second material level meter disposed on the hopper, wherein the first material level meter is located above the second material level meter.

9. The oily sludge treatment system according to claim 1, characterized in that: The desorption and sedimentation unit includes a thermal desorption device, a condensation device and a sedimentation and separation device which are arranged in sequence, the second waste inlet is arranged in the thermal desorption device, the waste gas outlet and the second heat cycle inlet are arranged in the condensation device, and the second heat cycle outlet is arranged in the sedimentation and separation device.

10. The oily sludge treatment system according to claim 9, characterized in that: The heat dissipation unit also includes a second heat dissipation outlet, and the desorption sedimentation unit also includes a discharge device, which is connected to the outlet of the thermal desorption device and is used to transport the solid waste generated by the thermal desorption device. The discharge device has a fourth thermal cycle inlet and a fourth thermal cycle outlet, and the fourth thermal cycle inlet is connected to the second heat dissipation outlet, and the fourth thermal cycle outlet is connected to the first thermal cycle inlet.

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