A system for recycling and treating oily sludge wastewater

Abstract

The oily sludge wastewater recovery and treatment system of the present invention relates to the technical fields of safety, environmental protection, high efficiency, energy saving, and resource recycling and utilization. The liquid pipeline at the bottom of the sewage liquid raw material storage tank is transported to the multifunctional cleaning unit and part of the oil is recovered. The oil-sludge-water mixture of the material enters the conditioning and analysis pretreatment unit, and then passes through the oil-cement coarse-fine separation unit to recover most of the oil. The separated sewage is treated by the rapid mixing high-efficiency sewage treatment unit to produce qualified water for recycling; after the flocculant is added to the rapid mixing high-efficiency sewage treatment unit through the dry powder dosing device, the generated oily sludge is input into the sludge treatment and inert heat integrated unit to discharge the qualified mud. This system classifies the sewage discharged from the cleaning and treats it to meet the requirements of resource recycling and utilization. The entire mechanical cleaning and classification and standard treatment process of the sewage discharged from the cleaning has low energy consumption, high resource recovery and utilization rate, low construction intensity, and is safe and environmentally friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of safety, environmental protection, high efficiency, energy saving and resource recycling, and in particular to an oily sludge and wastewater recycling and treatment system for resource recycling mechanical cleaning and classification of cleaning waste liquid that meets standards in petroleum and petrochemical enterprises. Background Art

[0002] The waste oil and sewage tanks, waste oil and sewage pools, waste oil and sewage pits, sedimentation tanks, backwash tanks, crude oil tanks, microbial reaction pools, etc. used by petroleum and petrochemical enterprises in the production process need to be cleaned or repaired after a period of use, especially the primary sedimentation tanks and secondary sedimentation tanks in the oil field production process. Under the production process conditions of polymer flooding or ternary flooding oil production, a large amount of waste oil and slag is generated in the tanks, occupying the effective volume of the tanks, resulting in insufficient available sedimentation volume of the sedimentation tanks, affecting the production of the oil field; the microbial reaction pools of oil fields or petrochemical enterprises with a depth of 7 meters are difficult to clean. The mechanical cleaning of the above tanks, pools, and pits and the waste liquid washed out cannot be directly recycled or discharged, resulting in a waste of valuable resources and safety and environmental protection issues. Summary of the invention

[0003] The present invention aims to overcome the deficiencies of the prior art and provides an oily sludge wastewater recovery and treatment system to solve the problems of large waste liquid volume, production impact, high transportation cost and non-recyclability in petroleum and petrochemical enterprises.

[0004] The oil-containing sludge wastewater treatment and recovery system of the present invention is composed of a sewage liquid raw material storage tank, a multifunctional cleaning unit, a conditioning and analysis pretreatment unit, an oil-cement coarse-fine separation unit, a rapid mixing high-efficiency sewage treatment unit and a sludge treatment and inert heating integrated unit. The liquid pipeline at the bottom of the sewage liquid raw material storage tank is transported to the multifunctional cleaning unit and part of the oil is recovered, and the oil-sludge-water mixed liquid of the material enters the conditioning and analysis pretreatment unit, and then passes through the oil-cement coarse-fine separation unit to recover most of the oil. The separated sewage is treated by the rapid mixing high-efficiency sewage treatment unit to produce qualified water for recovery; after the flocculant is added to the rapid mixing high-efficiency sewage treatment unit through a dry powder dosing device, the generated oil-containing sludge is input into the sludge treatment and inert heating integrated unit to discharge the qualified sludge.

[0005] As a further improvement of the present invention, a raw material inlet is provided on the dirty liquid raw material storage tank, a sewage jet cleaning machine is arranged at the central axis of the dirty liquid raw material storage tank, and a manhole is provided at the bottom; the multifunctional cleaning unit includes a thermal shear filter and a heating suction tank; the tempering and analysis pretreatment unit includes a container body and an oil collector for floating oil therein; the oil-cement coarse and fine separation unit includes a three-stage horizontal centrifuge, a crude oil tank, a coarse separation oil tank, a sewage tank, and a disc separator; the fast mixing and high-efficiency treatment unit includes a stirring tank and a disc screw desludging machine; the dirty liquid raw material storage tank is connected to the upper inlet pipeline of the thermal shear filter through the bottom manhole output, the bottom pipeline of the thermal shear filter is connected to the heating suction tank, and the liquid outlet at the bottom of the heating suction tank is connected to the external oil outlet A and the dirty liquid raw material storage tank through the transfer and cleaning pump outlet pipeline. The sewage jet cleaning machine and the upper inlet of the container body of the conditioning and analysis pretreatment unit, the floating oil collector in the container body is connected to the coarse separation oil tank pipeline, and the outlet pipeline at the bottom of the container body is connected to the three-stage horizontal centrifuge of the oil-cement coarse and fine separation unit. The sewage outlet pipeline of the three-stage horizontal centrifuge is connected to the sewage tank, the water-containing oil outlet pipeline is connected to the coarse separation oil tank, and the oil-containing sludge outlet B is connected to the screw conveyor. The coarse separation oil tank is connected to the disc separator through the heat exchanger pipeline, and the oil outlet pipeline of the disc separator is connected to the crude oil tank. The sewage in the sewage tank, the sewage produced by the disc separator and the produced sewage are all connected to the mixing tank by pipelines. The outlet of the dry powder dosing device is connected to the mixing tank. After the sewage is flocculated, it enters the disc screw desludging machine for desludging. After the flocculated sewage is treated, it is discharged through the filter tank to meet the standards.

[0006] As a further improvement of the present invention, the sludge treatment and inert heat integrated unit includes a vertical steam boiler and a sludge analysis device, the sludge analysis device is placed in the vertical steam boiler, the oil-containing sludge outlet B of the oil-cement coarse and fine separation unit and the oil-containing sludge produced by the disc screw desludging machine in the rapid mixing high-efficiency treatment unit are transported to the raw material inlet C at the top of the sludge analysis device, and the qualified sludge is discharged from its bottom outlet D, and the analysis gas outlet F at the top of the sludge analysis device is refluxed into the container body of the tempering and analysis pretreatment unit through a condenser; the flue gas outlet at the top of the vertical steam boiler is connected to the flue gas cooler through an induced draft fan, and the outlet pipeline of the flue gas cooler is connected to the sewage liquid raw material storage tank.

[0007] As a further improvement of the present invention, the sludge treatment and inert heating integrated unit provides softened water for the sludge treatment and inert heating integrated unit through a fully automatic softening water device and a softened water tank. The softened water in the softened water tank is transported to the condensation tank and the flue gas cooler in sequence through a cooling water pump and then injected back into the softened water tank; the steam outlet E of the vertical steam boiler provides heating steam for the hot shear filter, the heating suction tank, the container body, the crude oil tank, the coarse separation oil tank and the heat exchanger.

[0008] As a further improvement of the present invention, the sludge analysis device is composed of a heating cylinder, a spiral and a spiral outer cylinder. The heating cylinder is composed of an upper straight cylinder section and a lower conical cylinder section. A spiral outer cylinder is coaxially fixed in the heating cylinder. The spiral is placed in the spiral outer cylinder and its top end cooperates with the heating cylinder. A raw material inlet C is provided at the top of the heating cylinder, an outlet D is provided at the bottom, and an analysis gas outlet F is provided at the top.

[0009] As a further improvement of the present invention, the thermal shear filter is composed of a shell, with a material inlet at the upper part of the shell and a material outlet at the lower part, a perforated plate is fixed in the middle and lower part of the shell, a filter body is fixed in the dirt receiving chamber above the perforated plate, and a sewage outlet is provided in the lower part of the dirt receiving chamber.

[0010] As a further improvement of the present invention, the filtering body is composed of a hot shear filter tube assembly and a tick ruler assembly. The hot shear filter tube assembly is composed of a steam inlet main pipe and a steam outlet main pipe connected to one or more layers of filter tubes respectively. Each layer of filter tubes is composed of two semicircular filter tubes, and the two ends of the two semicircular filter tubes are respectively connected to the steam inlet main pipe and the steam outlet main pipe; the tick ruler assembly is composed of more than one tick ruler fixed from bottom to top on both sides of a vertical I-shaped support frame, and the I-shaped support frame is placed in the middle of the two semicircular filter tubes, and the tick ruler is located in each layer of filter tube and is gap-matched with it; a steel ball rack is fixed at the axial position at the bottom of the I-shaped support frame to match the steel balls on the orifice plate; a rotating sealing shaft is fixed at the top of the I-shaped support frame.

[0011] As a further improvement of the present invention, the tick ruler is a Y-shaped structure, a gasket is provided between the tick ruler, and the screw rod passes through the tick ruler and the gasket in sequence and is fixed on the I-shaped support frame.

[0012] As a further improvement of the present invention, a manhole sealing opening and closing device is provided at the manhole at the bottom of the raw material storage tank. The manhole sealing opening and closing device is a chuck sleeved on the circumference of the manhole connecting pipe, an inner sealing hose is embedded in the inner groove of the chuck, and an outer sealing hose is embedded in the outer groove of the chuck. The sealing box body is covered on the chuck and sealed and fixed with the chuck, and a liquid outlet pipe is opened on the bottom surface of the sealing box body; more than three baffle bolts are evenly distributed and connected with the wrench passing through the sealing box body in sequence through the manhole flange plate and the blind plate; the hammer passes through the bottom of the sealing box body and is fixed to the blind plate.

[0013] As a further improvement of the present invention, flexible sealing boxes are respectively provided at the sealing positions of the wrench and the hammer with the sealing box body. The flexible sealing boxes are composed of a sealing flange I, a sealing flange II, a pressure-bearing hose and a sealing sleeve. The two ends of the pressure-bearing hose are respectively fixedly connected to the sealing flange II and the sealing sleeve. The sealing flange II is fixed to the sealing flange I with bolts, and the sealing flange I is fixed to the sealing box body.

[0014] The oily sludge wastewater recycling and treatment system of the present invention meets the requirements of vehicle transportation. Each unit or device has an independent use function, and the system function can be selected according to the actual needs of the user. The cables and pipelines that need to be connected on the construction site are all connected with quick connectors, and the construction and disassembly are convenient, fast, safe and reliable. The foldable ladder, platform and guardrail structure ensure construction safety while reducing the labor intensity of disassembly and assembly of auxiliary facilities.

[0015] The oily sludge and wastewater recycling and treatment system of the present invention is safe, environmentally friendly, efficient, and energy-saving in construction. At the same time, the cleaning wastewater is classified and treated to meet the standards and meet the requirements for resource recycling. The sludge can meet the harmless oil content index requirements after treatment, the emulsified crude oil can meet the crude oil sales index requirements after treatment, the oil field wastewater can meet the reinjection water index requirements after treatment, and the petrochemical enterprise wastewater can meet the microbial reaction pool water index requirements after treatment. The entire mechanical cleaning and cleaning wastewater classification and standard treatment process has low energy consumption, high resource recovery and utilization rate, low construction intensity, safety and environmental protection. The application and implementation of the present invention can help users solve actual production difficulties, protect the environment, and reduce the waste of a large number of valuable resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural principle block diagram of the present invention;

[0017] Figure 2 It is a schematic diagram of the system structure of the present invention;

[0018] Figure 3 It is a schematic diagram of the structure of the sludge analysis device of the present invention;

[0019] Figures 4 to 8 It is a schematic diagram of the structure of the thermal shear filter of the present invention;

[0020] Figures 9 to 11 It is a structural schematic diagram of the manhole sealing opening and closing device of the present invention;

[0021] Fig.12 It is a structural schematic diagram of a flexible sealing box. DETAILED DESCRIPTION

[0022] The oily sludge wastewater recovery and treatment system of the present invention is as follows: Figure 1As shown, it is composed of a sewage liquid raw material storage tank 1, a multifunctional transfer and cleaning unit 2, a conditioning and analysis pretreatment unit 3, an oil-sludge-water coarse and fine separation unit 4, a rapid mixing high-efficiency sewage treatment unit 5, a dry powder dosing device 6, and a sludge treatment and inert heat integrated unit 7. The above seven units are controlled by their respective control cabinets. The bottom liquid pipeline of the sewage liquid raw material storage tank 1 is transported to the multifunctional cleaning unit 2 through the manhole sealing opening and closing device, and part of the oil is recovered. The oil-sludge-water mixed liquid of the material enters the conditioning and analysis pretreatment unit 3, and then passes through the oil-cement coarse and fine separation unit 4 to recover most of the oil. The separated sewage is treated by the rapid mixing high-efficiency sewage treatment unit 5 to produce qualified water for recycling; after the flocculant is added to the rapid mixing high-efficiency sewage treatment unit 5 through the dry powder dosing device 6, the oil-containing sludge generated is input into the sludge treatment and inert heat integrated unit 7, and the recovered sludge is discharged from it.

[0023] The functions of the above-mentioned units are as follows:

[0024] The manhole sealing opening and closing device is used to open, adjust and close the manhole blind plate under the condition of being sealed to the outside when the liquid level in the tank is higher than the manhole, so as to realize the external transportation of the liquid in the tank;

[0025] The multifunctional transfer and cleaning unit 2 is connected to the manhole sealing and opening and closing device, and is used to complete the functions of suction, thermal shearing, filtering, heating, transfer, and cleaning of the dirty liquid and clots in the tank;

[0026] The conditioning and analysis pretreatment unit 3 receives the waste liquid, performs high-temperature viscosity reduction and demulsification on the waste liquid, reduces the emulsification degree of the waste oil, and performs gravity separation on the waste liquid;

[0027] The oil-sludge-water coarse-fine separation unit 4 is pretreated by the tempering and analysis pretreatment unit 3, and the pretreated dirty liquid is input into the three-stage horizontal centrifuge 15 for separation by the mud pump, and the separated sewage enters the sewage tank 18; the water-containing dirty oil enters the coarse separation oil tank 17 after separation; the oil-containing sludge is transported out through the outlet B via the screw conveyor. The dirty oil in the coarse separation oil tank 17 is subjected to secondary high-temperature demulsification by the heat exchanger 23, and then enters the disc separator 19 for separation. The effluent of the disc separator is transported to the three-stage fast-mixing high-efficiency sewage treatment unit 5, and the slag-containing sewage discharged from the disc separator 19 enters the sewage tank 76 and is then transported to the three-stage fast-mixing high-efficiency sewage treatment unit 5 by the mud pump; the water content index of the oil output from the disc separator 19 is ≤0.3%, and after entering the crude oil tank 16, it is transported out by the external oil pump;

[0028] The fast-mixing high-efficiency sewage treatment unit 5 treats the sewage delivered by the oil-sludge-water coarse-fine separation unit. After the sewage delivered to the flocculation and stirring tank is flocculated, it enters the disc screw desludging machine to separate the flocs, and the separated flocs are transported out by the screw conveyor. After the flocculated sewage is desludged, it is then passed through the flotation device 80 for secondary flocculation and desludging. After being treated by the flotation device 80, the sewage is transported to the filter tank 24 for filtration and then directly transported out.

[0029] The sludge treatment and inert heat integrated unit 7 is an integrated unit that generates flue gas, steam and completes oil sludge treatment. The sludge analysis device is installed in the vertical steam boiler, and the oily sludge is treated by heating the sludge analysis device, while providing steam heat source and explosion-proof inert gas for mechanical cleaning.

[0030] like Figure 2 As shown, the sewage liquid raw material storage tank 1 of the present invention is provided with a raw material inlet, a sewage jet cleaning machine 9 is arranged at the central axis of the sewage liquid raw material storage tank 1, and a manhole 10 is arranged at the bottom; the multifunctional cleaning unit 2 includes a thermal shear filter 11 and a heating suction tank 12, and the liquid outlet at the bottom of the heating suction tank 12 is transported by a transfer cleaning pump 73 to the sewage jet cleaning machine 9 in the sewage liquid raw material storage tank 1, and the sewage jet cleaning machine is hoisted by a composite hose and falls into the tank from the manhole at the top of the sewage liquid raw material storage tank 1, and the sewage jet cleaning machine is at a distance of 10 meters from the sewage raw material storage tank 1. About 2 meters away from the liquid surface in the tank, the tank top and tank wall are mechanically cleaned, and the dirty liquid in the tank is transferred to the multifunctional cleaning unit 2; the conditioning and analysis pretreatment unit 3 includes a container body 13 and an oil collector 14 inside it; the coarse and fine separation unit 4 includes a three-stage horizontal centrifuge 15, a crude oil tank 16, a coarse separation tank 17, a sewage tank 18, and a disc separator 19; the fast mixing high-efficiency treatment unit 5 includes a mixing tank 20 and a disc screw desludging machine 21; the dirty liquid is output through the manhole 10 at the bottom of the raw material storage tank and connected to the hot shear filter 1 1, the bottom pipeline 22 of the thermal shear filter 11 is connected to the heating suction tank 12, one outlet pipeline of the heating suction tank 12 is an external oil outlet A, a crude oil online detector 82 is installed on the external oil pipeline, and the other outlet pipeline is connected to the upper inlet of the container body 13 in the conditioning and analysis pretreatment unit, the valves on the boiler steam line and the steam return line are opened, and the sewage transported into the conditioning and analysis pretreatment unit is subjected to high-temperature demulsification and viscosity reduction pretreatment, and the floating oil in the container body 13 is collected. The collector 14 is connected to the coarse separation oil tank 17 by pipeline, the outlet pipeline at the bottom of the container body 13 is connected to the three-stage horizontal centrifuge 15 of the oil-cement coarse and fine separation unit 4, the sewage outlet pipeline of the three-stage horizontal centrifuge 15 is connected to the sewage tank 18, the water-containing waste oil outlet pipeline is connected to the coarse separation oil tank 17, the oil-containing sludge outlet B is connected to the screw conveyor, the coarse separation oil tank 17 is connected to the disc separator 19 via the heat exchanger 23 pipeline, and the oil outlet pipeline of the disc separator 19 is connected to the crude oil tank 16, thereby completing the oil separation. The sewage tank 18 and the output sewage and the output sewage liquid of the disc separator 19 are connected to the stirring tank 20 through pipelines. The outlet of the dry powder dosing device 6 (PAC and PAM can be added at the same time during sewage treatment. The type and amount of the agents are selected by technicians in this field according to the characteristics of the sewage to be treated) is connected to the stirring tank 20. The sewage enters the disc screw desludging machine 21 for desludging after stirring and flocculation. After treatment, the flocculated sewage is discharged through the filter tank 24 as qualified water, and water separation is completed.

[0031] like Figure 2 As shown, the sludge treatment and inert heat integrated unit 7 includes a vertical steam boiler 25 and a sludge analysis device 26. The sludge analysis device 26 is placed in the vertical steam boiler 25. The oily sludge outlet B of the oil-cement coarse and fine separation unit 4 and the oily sludge produced by the disc screw desludge machine 21 in the fast mixing high-efficiency treatment unit 5 are transported to the raw material inlet C at the top of the sludge analysis device 26, and the recovered sludge is discharged from its bottom outlet D. The raw material inlet C and the bottom outlet D are equipped with closed screw conveyors. The analytical gas outlet F at the top of the sludge analysis device 26 flows back to the container body 13 of the quenching and tempering analysis pretreatment unit 3 through the condensation tank 27.

[0032] like Figure 3 As shown, the sludge analysis device 26 is composed of a heating cylinder 33, a spiral 34 and a spiral outer cylinder 35. The heating cylinder 33 is composed of a straight cylinder section at the top and a conical cylinder section at the bottom. The spiral outer cylinder 35 is coaxially fixed in the heating cylinder 33. The spiral 34 is placed in the spiral outer cylinder 35 and its top end is matched with the heating cylinder 33. The upper part of the heating cylinder 33 is provided with a raw material inlet C, the bottom is provided with an outlet D, and the top is provided with a decomposition gas outlet F.

[0033] The sludge treatment and inert heat integrated unit 7 provides softened water through the fully automatic softening water device 29 and the softening water tank 30. In order to condense the gas released by the thermal analysis of the oil sludge and reduce the boiler flue gas temperature, the softened water in the softening water tank is sequentially transported to the condensation tank 27 and the flue gas cooler 32 through the cooling water pump to cool it down. At the same time, the heated softened water flows back to the softening water tank 30 and is injected into the vertical steam boiler by the water pump, which meets the requirements of the mechanical tank cleaning for the flue gas temperature and the condensation of the gas released by the thermal analysis of the oil sludge, and heats the boiler softening water to save energy to the maximum extent. The sludge analysis device is used to perform intermittent cycle thermal analysis on the oily sludge. The oil content index of the sludge after treatment is ≤0.3%, meeting the requirements of the harmless sludge oil content index. The thermal analysis process is to heat the heating cylinder through the vertical steam boiler flue, and the upper closed screw conveyor stops after quantitatively inputting the oily sludge into the heating cylinder. The oily sludge falls by gravity in the heating cylinder, and is lifted to the top by the vertical screw conveyor and then falls into the annular space formed by the heating cylinder and the vertical screw conveyor shell for cyclic heating analysis (as shown by the arrow in the figure). At the same time, the gas extracted by thermal analysis is sucked into the condensation tank 27 by the negative pressure analysis gas outlet F for condensation. The thermal analysis temperature of the oily sludge is measured by the temperature sensing probe 77 inside it. When the thermal analysis temperature and time reach the set value, the lower closed screw conveyor is started to output the thermally analyzed sludge to the sludge analysis device, and the oily sludge is treated to meet the standards.

[0034] The steam outlet E of the vertical steam boiler 25 provides heating steam for the hot shear filter 11, the heating suction tank 21, the container body 13, the crude oil tank 16, the coarse separation oil tank 17 and the heat exchanger 23, and the above-mentioned heating steam outlets are connected to the container body 13 by pipelines. The flue gas outlet at the top of the vertical steam boiler 25 is connected to the flue gas cooler 32 through the induced draft fan 31, and the outlet pipeline of the flue gas cooler 32 is connected to the waste liquid raw material storage tank 1.

[0035] Among the sampling gas pipes of the multi-channel real-time online gas detection device 78, one is connected to the flue gas outlet of the flue gas cooler to detect the oxygen content of the boiler flue gas so as to adjust the opening of the boiler induced draft fan inlet valve so that the flue gas transported to the tank meets the requirements; the other sampling gas pipes are placed above the liquid surface in the sewage liquid raw material storage tank 1 to detect the oxygen and combustible gas concentrations in the sewage liquid raw material storage tank 1.

[0036] like Figures 8 to 11 As shown, a manhole sealing opening and closing device is provided at the manhole 10 at the bottom of the sewage liquid raw material storage tank 1. The manhole sealing opening and closing device is a chuck 56 sleeved on the circumference of the manhole connecting pipe 55. The chuck is formed by two semicircular chucks 69 butted together, and is fixed by a chuck bolt 68 at the butt joint. An inner sealing hose 58 is embedded in the inner groove 57 of the chuck 56, and an outer sealing hose 60 is embedded in the outer groove 59 of the chuck 56. A sealing box 61 is covered on the chuck 56 and fixedly sealed with the chuck 56. A liquid outlet pipe 62 is opened on the bottom surface of the sealing box 61; more than three baffle bolts 63 are evenly distributed and connected with a wrench 66 passing through the sealing box 61 in sequence through the manhole flange plate 64 and the blind plate 65, and the baffle of the baffle bolt 63 is clamped on the manhole sealing flange pipe. A hammer 67 passes through the sealing box 61 and is fixed to the blind plate 65. Flexible sealing boxes 90 (such as Fig. 9 , Fig.12As shown in the figure, the flexible sealing box 90 is composed of a sealing flange I 86, a sealing flange II 87, a pressure hose 88 and a sealing sleeve 89. The two ends of the pressure hose 88 are fixedly connected to the sealing flange II 87 and the sealing sleeve 89 respectively. The sealing flange II 87 is bolted to the sealing flange I 86 and a sealing ring is arranged on the butt surface. During installation, the wrench 66 or the hammer 67 passes through the sealing sleeve 89, the pressure hose 88, the sealing flange II 87 and the sealing flange I 86 in sequence. More than one sealing ring is arranged on the inner ring surface of the sealing sleeve 89, and the sealing flange I 86 is fixed on the sealing box body 61. The two-body semicircular chuck 69 and the sealing box body 61 are processed and formed from aluminum alloy, which is light and easy to install; the wrench 66 is made of stainless steel pipe, and the baffle bolt 63 can extend into the stainless steel pipe of the opening wrench; the pressure hose can be replaced by a bellows to compensate for the installation error between the wrench or hammer and the baffle bolt or threaded hole. The chuck is provided with an exhaust port 70 and a pressure port 71. During construction, according to the position corresponding to the opening wrench on the sealing box, replace the four manhole flange bolts with the baffle bolts, remove the flange blind plate bolts at the corresponding position of the hammer, tap the bolt holes into threaded holes, and then remove the other manhole flange bolts that have not been removed; insert the inner sealing hose onto the manhole flange pipe, apply self-forming pad sealant on the contact surface of the two-body chuck, insert the inner groove of the two-body chuck into the inner sealing hose, install the two-body chuck with the chuck bolts, and install the outer sealing hose into the outer groove of the two-body chuck; insert the sealing box into the two-body chuck, observe through the top mirror 79 of the sealing box, install the wrench 66 on the baffle bolt 63, and screw the hammer 67 into the blind plate 6 5; flush water to the pressure port 71 at the lower part of the outer sealing hose and the inner sealing hose, open the exhaust port 70 at the upper part of the outer sealing hose and the inner sealing hose to exhaust, close the exhaust port 70 after exhausting, and close the pressure port 71 after flushing and pressure; perform a water pressure test on the sealed box through the pressure test interface 72, replace the top sight glass 79 with the vent hose 81 and lead it to the tank top after the pressure test is qualified, ensure that the sealed box is connected with the top of the tank, twist the opening wrench to open the baffle bolt, hit the hammer to open the manhole blind plate, and the liquid in the tank flows into the sealed box from the manhole. The material flow rate can be adjusted by twisting the opening wrench to open, adjust or close the manhole blind plate.

[0037] like Figures 4 to 8 As shown, the thermal shear filter 11 is composed of a shell 36, a material inlet 37 is provided at the upper part of the shell 36, a material outlet 38 is provided at the lower part, a perforated plate 39 is fixed at the middle and lower part of the shell 36, a filter body 41 is fixed in the dirt receiving chamber 40 at the upper part of the perforated plate 39, and a sewage outlet 42 is provided at the lower part of the dirt receiving chamber 40. The filter body 41 is composed of a thermal shear filter tube assembly and a ruler assembly, and the thermal shear filter tube assembly is composed of a steam inlet main pipe 43 and a steam outlet main pipe 44, each of which is connected to one or more layers of filter tubes 45 (such as Figure 5As shown in FIG. 1 , each filter tube 45 is composed of two semicircular filter tubes 46, and the two ends of the two semicircular filter tubes 46 are respectively connected to the steam inlet main pipe 43 and the steam outlet main pipe 44 (as shown in FIG. Figure 6 As shown in the figure), the steam inlet main pipe 43 and the steam outlet main pipe 44 are respectively connected to the steam inlet main pipe 47 at the upper part of the shell 36 and the steam outlet main pipe 48 at the lower part.

[0038] The ruler assembly is a Y-shaped ruler 50 fixed from bottom to top on the two side walls of the vertical I-shaped support frame 49, with a gasket between the rulers 50, and a screw 54 passing through the ruler 50 and the gasket and fixed on the I-shaped support frame 49 in sequence (such as Figure 7 As shown). The I-shaped support frame 49 is placed between the two semicircular filter tubes 46, and the tick ruler 50 is located in each layer of the filter tube 45 and is in gap fit with it; a steel ball rack 51 is fixed at the axial position of the bottom of the I-shaped support frame 49 to match the steel ball 52 on the orifice plate 39; a rotating sealing shaft 53 is fixed at the top of the support frame 49, and the rotating sealing shaft 53 passes through the top of the shell 36, and can be connected to the drive motor to realize automatic control or manual control, and the tick ruler assembly can also be made by cross-crossing two I-shaped support frames 49, and tick rulers are respectively provided on both sides thereof. When steam is introduced, the stainless steel filter tube 45 heats up, realizing thermal shear filtration of the clot during the suction process; the Y-shaped structure of the tick ruler 50 (as shown Figure 8 The hot shear filter is installed in the gap of the stainless steel filter tube 45, and the ticking assembly is rotated regularly by controlling the driving motor M connected to the rotating sealing shaft 53 to realize automatic cleaning of the filter gap. The hot shear filter is used in the multifunctional transfer cleaning unit. In addition to hot shear filtering of the clots in the suction medium, it can also filter out the paint, stones, nuts, wires, rags, etc. in the tank (pool, pit), to prevent foreign matter from entering the transfer cleaning pump 73 and causing mechanical failure. At the same time, the hot shear filter is provided with a hand hole 74, a sewage outlet 42 and a steam sweeping valve 75, which can regularly clean the hot shear filter's dirt chamber.

[0039] In addition, the waste liquid raw material storage tank 1 is usually divided into layers from top to bottom, namely, crude oil layer, waste oil layer, transition layer, clear water layer, sewage layer, and mud layer. The upper waste oil layer and transition layer have complex compositions, mainly waste liquid containing emulsified oil and floating mud condensate; there are sludge condensate and a small amount of waste oil inside the waste oil layer and mud layer. If the upper waste oil layer and transition layer need to be recycled, close the bottom manhole 10 of the waste liquid raw material storage tank 1 and the upper inlet pipeline valve of the thermal shear filter 11. Connect the composite hose of the floating tank oil collector to the manhole on the top of the waste liquid raw material storage tank 1 and put it into the tank. Manually start the water ring vacuum pump 85 to form a negative pressure in the heating suction tank 12. At the same time, open the boiler steam line and the return water line to heat the heating coils of the thermal shear filter 11 and the heating suction tank 12. The valves on the pipeline are opened in sequence, and the negative pressure in the heating suction tank 12 sucks the crude oil on the top of the primary sedimentation tank. After thermal shear filtration by the thermal shear filter 11, the crude oil enters the heating suction tank 12 for external transmission. A crude oil online detector 82 is installed on the external oil pipeline to detect the external oil. When the quality of the external oil is unqualified, the external oil valve I83 is closed to complete the transfer of the crude oil layer on the top of the primary sedimentation tank; the valve I83 is closed, and the valve II84 is opened to transport the dirty oil layer or transition layer in the primary sedimentation tank to the modulation and analysis pretreatment unit through the multi-functional transfer and cleaning unit.

[0040] The present invention can realize mechanical cleaning and meet the requirements of classification, standard treatment and recycling of the cleaned dirty liquid, with significant economic benefits; the system operates in a closed environment, and no personnel need to enter the tank (pool, pit) during the entire implementation process, which meets the requirements of safety, environmental protection and occupational health; mechanical cleaning and standard treatment are carried out simultaneously, with a high degree of automation, high construction efficiency, low operating energy consumption, and labor saving.

Claims

1. A system for recycling and treating oily sludge wastewater, comprising a wastewater raw material storage tank (1), a multifunctional cleaning unit (2), a conditioning and analysis pretreatment unit (3), an oil-cement coarse-fine separation unit (4), a rapid mixing high-efficiency wastewater treatment unit (5) and a sludge treatment and inert heat integrated unit (7), characterized in that The liquid pipeline at the bottom of the sewage liquid raw material storage tank (1) is transported to the multifunctional cleaning unit (2) and part of the oil is recovered. The oil-sludge-water mixture of the material enters the conditioning and analysis pretreatment unit (3), and then passes through the oil-cement coarse-fine separation unit (4) to recover most of the oil. The separated sewage is treated by the rapid mixing high-efficiency sewage treatment unit (5) to produce qualified water for recycling; after the flocculant is added to the rapid mixing high-efficiency sewage treatment unit (5) through the dry powder dosing device (6), the oil-containing sludge generated is input into the sludge treatment and inert heat integrated unit (7) for treatment and discharge of qualified sludge; The waste liquid raw material storage tank (1) is provided with a raw material inlet, a sewage jet cleaning machine (9) is arranged at the central axis of the waste liquid raw material storage tank (1), and a manhole (10) is arranged at the bottom; the multifunctional cleaning unit (2) comprises a thermal shear filter (11) and a heating suction tank (12); the conditioning and analysis pretreatment unit (3) comprises a container body (13) and an oil floating collector (14) therein; the oil-cement coarse and fine separation unit (4) comprises a three-stage horizontal centrifuge (15), a crude oil tank (16), a coarse separation oil tank (17), A sewage tank (18), a disc separator (19); a quick-mixing high-efficiency sewage treatment unit (5) including a stirring tank (20) and a disc screw desludging machine (21); the sewage liquid raw material storage tank (1) is connected to the upper inlet pipeline of the thermal shear filter (11) through the bottom manhole (10); the bottom pipeline (22) of the thermal shear filter (11) is connected to the heating suction tank (12); the bottom liquid outlet of the heating suction tank (12) is connected to the external oil outlet A, the sewage liquid raw material storage tank (1) through the transfer cleaning pump (73) pipeline. ), the upper inlet of the container body (13) of the conditioning and analysis pretreatment unit (3), the floating oil collector (14) in the container body (13) is connected to the coarse separation oil tank (17) pipeline, the outlet pipeline at the bottom of the container body (13) is connected to the three-stage horizontal centrifuge (15) of the oil-cement coarse and fine separation unit (4), the sewage outlet pipeline of the three-stage horizontal centrifuge (15) is connected to the sewage tank (18), the water-containing oil outlet pipeline is connected to the coarse separation oil tank (17), and the oil-containing sludge outlet B is connected to a screw conveyor, the crude separation oil tank (17) is connected to the disc separator (19) through a heat exchanger (23) pipeline, and the oil outlet pipeline of the disc separator (19) is connected to the crude oil tank (16); the sewage tank (18), the output sewage and the output sewage liquid of the disc separator (19) are connected to the mixing tank (20) through pipelines, the outlet of the dry powder dosing device (6) is connected to the mixing tank (20), and the sewage is flocculated and then enters the disc screw desludging machine (21) for desludging. The flocculated sewage is subjected to secondary treatment and then discharged through the filter tank (24) to meet the standards; The sludge treatment and inert heat integrated unit (7) comprises a vertical steam boiler (25) and a sludge analysis device (26), wherein the sludge analysis device (26) is placed in the vertical steam boiler (25); the oily sludge outlet B of the oil-cement coarse-fine separation unit (4) and the oily sludge produced by the disc screw desludging machine (21) in the rapid mixing high-efficiency sewage treatment unit (5) are transported to the raw material inlet C at the top of the sludge analysis device (26), and the recovered sludge is discharged from the bottom outlet D thereof; the analysis gas outlet F at the top of the sludge analysis device (26) is refluxed into the container body (13) of the quenching and tempering analysis pretreatment unit (3) through the condenser (27); the flue gas outlet at the top of the vertical steam boiler (25) is connected to the flue gas cooler (32) through the induced draft fan (31), and the outlet pipeline of the flue gas cooler (32) is connected to the sewage liquid raw material storage tank (1); The sludge analysis device (26) is composed of a heating cylinder (33), a spiral (34) and a spiral outer cylinder (35). The heating cylinder (33) is composed of an upper straight cylinder section and a lower conical cylinder section. The spiral outer cylinder (35) is coaxially fixed in the heating cylinder (33). The spiral (34) is placed in the spiral outer cylinder (35) and its top end is matched with the heating cylinder (33). The upper part of the heating cylinder (33) is provided with a raw material inlet C, the bottom is provided with an outlet D, and the top is provided with an analysis gas outlet F. A manhole sealing opening and closing device is provided at the manhole (10) at the bottom of the waste liquid raw material storage tank (1). The manhole sealing opening and closing device comprises a chuck (56) sleeved on the circumference of a manhole connecting pipe (55), an inner sealing rubber hose (58) is embedded in an inner groove (57) of the chuck (56), and an outer sealing rubber hose (60) is embedded in an outer groove (59) of the chuck (56); a sealing box (61) covers the chuck (56) and is sealed and fixed to the chuck (56); a liquid outlet pipe (62) is opened on the bottom surface of the sealing box (61); more than three baffle bolts (63) are evenly distributed and sequentially connected to a wrench (66) passing through the sealing box (61) through a manhole flange plate (64) and a blind plate (65); a hammer (67) passes through the bottom of the sealing box (61) and is fixed to the blind plate (65).

2. The oily sludge wastewater recovery and treatment system according to claim 1, characterized in that The sludge treatment and inert heating integrated unit (7) provides softened water for the sludge treatment and inert heating integrated unit (7) through a fully automatic softening water device (29) and a softening water tank (30). The softened water in the softening water tank (30) is sequentially transported to a condensing tank (27) and a flue gas cooler (32) through a cooling water pump and then injected back into the softening water tank (30). The steam outlet E of the vertical steam boiler (25) provides heating steam for the thermal shear filter (11), the heating suction tank (12), the container body (13), the crude oil tank (16), the coarse separation oil tank (17) and the heat exchanger (23).

3. The oily sludge wastewater recovery and treatment system according to claim 1, characterized in that The thermal shear filter (11) is composed of a shell (36), wherein a material inlet (37) is provided at the upper portion of the shell (36), and a material outlet (38) is provided at the lower portion thereof; a perforated plate (39) is fixed at the middle and lower portion of the shell (36); a filter body (41) is fixed in a dirt receiving chamber (40) at the upper portion of the perforated plate (39); and a dirt discharge port (42) is provided at the lower portion of the dirt receiving chamber (40).

4. The oily sludge wastewater recovery and treatment system as claimed in claim 3, characterized in that The filter body (41) is composed of a heat shear filter tube assembly and a ticking ruler assembly. The heat shear filter tube assembly is composed of a steam inlet main pipe (43) and a steam outlet main pipe (44) respectively connected to one or more filter tubes (45). Each filter tube (45) is composed of two semicircular filter tubes (46). The two ends of the two semicircular filter tubes (46) are respectively connected to the steam inlet main pipe (43) and the steam outlet main pipe (44). The ticking ruler assembly is composed of one or more ticking rulers (50) fixed from bottom to top on both sides of a vertical I-shaped support frame (49). The I-shaped support frame (49) is placed between the two semicircular filter tubes (46). The ticking ruler (50) is located in each layer of the filter tube (45) and is gap-matched therewith. A steel ball frame (51) is fixed at the axial position of the bottom of the I-shaped support frame (49) to match the steel balls (52) on the orifice plate (39). A rotating sealing shaft (53) is fixed at the top of the I-shaped support frame (49).

5. The oily sludge wastewater recovery and treatment system as claimed in claim 4, characterized in that The tick ruler (50) is a Y-shaped structure, a gasket is provided between the tick ruler (50), and the screw rod (54) passes through the tick ruler (50) and the gasket in sequence and is fixed on the I-shaped support frame (49).

6. The oily sludge wastewater recovery and treatment system as claimed in claim 1, characterized in that Flexible sealing boxes (90) are respectively provided on the sealing box body (61), at the perforations of the wrench (66) and the hammer (67), and the flexible sealing box (90) is composed of a sealing flange I (86), a sealing flange II (87), a pressure hose (88) and a sealing sleeve (89), and the two ends of the pressure hose (88) are respectively fixedly connected to the sealing flange II (87) and the sealing sleeve (89), the sealing flange II (87) is bolted to the sealing flange I (86), and the sealing flange I (86) is fixed to the sealing box body (61).

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