Oily sludge treatment system

Abstract

The invention relates to an oily sludge treatment system which comprises a sludge dewatering and deoiling device, a cyclone separation device and a tail gas treatment device, the sludge dewatering and deoiling device comprises a condensation cavity, a second-stage heating cavity and a first-stage heating cavity which are sequentially arranged in a sleeving manner, the first-stage heating cavity is used for heating and dewatering primary sludge, the second-stage heating cavity is used for heating and cracking oil in the first-stage sludge, and the condensation cavity is used for cooling first-stage gas and second-stage gas; the cyclone separation device comprises a cyclone cylinder and is used for carrying out oil-gas-water separation on the oil-water-gas mixed liquid; the tail gas treatment device comprises a tail gas barrel used for purifying acid waste gas components in tail gas. The oily sludge treatment system realizes integrated treatment of sludge dewatering, oily liquid recovery and tail gas purification, and the sludge dewatering and deoiling device not only realizes continuous operation of water and oil in sludge and improves the sludge treatment efficiency, but also enables the secondary heating cavity to utilize heat of the primary heating cavity and saves the operation treatment cost.

Description

Technical Field

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

[0002] FPSO (Floating Production Storage and Offloading) is a floating production storage and offloading unit, which is mainly used for the preliminary processing and storage of crude oil. With the continuous commissioning of offshore oil field development wells and the substantial increase in liquid from old oil wells, the problem of sand and mud production in oil wells has become increasingly serious. The mud and sand need to be processed by the primary separator, secondary separator and electric dehydrator of FPSO. With the continuous increase of mud and sand, the FPSO processing equipment is often overloaded, the separator is difficult to effectively separate oil and water, and the electric field of the electric dehydrator fails. In order to ensure the normal operation of the crude oil processing system on FPSO, it is necessary to remove mud and sand at the bottom of the separator and electric dehydrator, so more and more oily sludge is generated.

[0003] Oily sludge is the main hazardous waste generated during the oil production process. It contains a large amount of harmful substances. There are great environmental risks in transporting it at sea, and it will also cause the loss of crude oil. The cost of hazardous waste treatment, packaging and transportation of oily sludge at land terminals is high, which affects the cost reduction and efficiency improvement of oilfield production. Therefore, whether from the perspective of environmental protection or from the perspective of economic benefits, the effective treatment of oily sludge is an issue that needs to be urgently addressed.

[0004] The composition of oily sludge is relatively complex, including oil-in-water emulsion, water-in-oil emulsion and suspended solids, etc. The water content of oily sludge on FPSO is 80% to 85%, the oil content is 10% to 15%, and the solid content is 1% to 5%. The oily sludge has complex composition, is difficult to handle, and is difficult to separate oil and water, resulting in low efficiency, low treatment efficiency, large footprint and weight, high power consumption, high water content in separated oil, and low crude oil recovery rate of traditional FPSO oily sludge treatment equipment.

[0005] In summary, in order to process oily sludge on-site, timely and efficiently in a limited space at sea, the present invention optimizes the oily sludge treatment technology based on the actual situation of offshore platforms to solve the problems of high space and weight requirements on FPSO, difficulty in dehydrating oily sludge, high ratio of oil to water in treated sludge, and high proportion of oil and suspended solids in treated sewage. Summary of the invention

[0006] The purpose of the present invention is to provide an oily sludge treatment system in order to overcome the defects of the above-mentioned prior art, improve the sludge treatment efficiency and save the treatment cost.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] An oily sludge treatment system, comprising:

[0009] A sludge dehydration and deoiling device, the sludge dehydration and deoiling device comprises a condensation chamber, a secondary heating chamber and a primary heating chamber which are sequentially arranged, the primary heating chamber is provided with a sludge inlet connected to the outside, the primary heating chamber is used to heat and dehydrate the primary sludge to obtain primary sludge and primary gas, the sludge inlet of the secondary heating chamber is connected to the sludge outlet of the primary heating chamber, the secondary heating chamber is used to heat and crack the oil in the primary sludge to obtain secondary sludge and secondary gas, the condensation inlet of the condensation chamber is respectively connected to the gas outlets of the primary heating chamber and the secondary heating chamber, and is used to cool the primary gas and the secondary gas to obtain an oil-water-gas mixture;

[0010] A cyclone separation device, the cyclone separation device comprises a cyclone cylinder, the inlet of the cyclone cylinder is connected to the condensation outlet of the condensation chamber, and is used to separate oil, gas and water from the oil-water-gas mixture, and the cyclone cylinder has an air outlet, an oil outlet and a water outlet;

[0011] The tail gas treatment device comprises a tail gas cylinder, the air inlet of the tail gas cylinder is connected with the air outlet of the cyclone cylinder, and the tail gas treatment device is used for purifying acidic waste gas components in the tail gas.

[0012] In one embodiment, the sludge dewatering and deoiling device includes a condensing cylinder, a secondary heating cylinder and a primary heating cylinder which are arranged in sequence, the area between the primary heating cylinder and the secondary heating cylinder forms the primary heating chamber, the area between the secondary heating cylinder and the condensing cylinder forms the secondary heating chamber, and the condensing chamber is provided in the condensing cylinder.

[0013] In one embodiment, a first heating interlayer is provided on the side wall of the first-level heating tube, and a first-level heating element is provided in the first heating interlayer; a second heating interlayer is provided on the side wall of the second-level heating tube, and a second-level heating element is provided in the first heating interlayer.

[0014] In one embodiment, the sludge dewatering and deoiling device also includes a rotary drive assembly, the secondary heating cylinder is rotatably connected to the primary heating cylinder, the condensing cylinder is rotatably connected to the secondary heating cylinder, a first spiral blade is provided on the outer wall of the secondary heating cylinder, and a second spiral blade is provided on the outer wall of the condensing cylinder, and the rotary drive assembly is respectively connected to the secondary heating cylinder and the condensing cylinder, and is used to drive the secondary heating cylinder and the condensing cylinder to rotate around their central axes.

[0015] In one of the embodiments, a central stirring rod is provided in the cyclone tube, a third spiral blade is provided on the central stirring rod, and the central stirring rod passes through the cyclone tube and is connected to the rotary drive assembly.

[0016] In one of the embodiments, a treatment filler is provided in the exhaust cylinder, the exhaust cylinder is arranged above the cyclone cylinder, and the central stirring rod passes through the cyclone cylinder and is connected to the treatment filler.

[0017] In one of the embodiments, a condensation coil and a condensation riser are provided in the condensation chamber, the condensation inlet of the condensation coil is connected to the air outlet of the primary heating chamber and the secondary heating chamber respectively, the condensation outlet of the condensation coil is connected to one end of the condensation riser, and the other end of the condensation riser is connected to the inlet of the cyclone cylinder; the condensation chamber is used to accommodate condensate, and has a condensate inlet and a condensate outlet.

[0018] In one of the embodiments, a cyclone heating interlayer is provided on the cyclone cylinder, the inlet of the cyclone heating interlayer is communicated with the condensate outlet of the condensation chamber, and the outlet of the cyclone heating interlayer is communicated with the condensate inlet of the condensation chamber.

[0019] In one embodiment, the sludge dewatering and deoiling device includes a sludge container, which is used to accommodate the primary sludge and the secondary sludge. The sludge container is provided with a sludge heating interlayer, the inlet of the sludge heating interlayer is connected to the condensate outlet of the condensation chamber, and the outlet of the sludge heating interlayer is connected to the inlet of the cyclone heating interlayer.

[0020] In one of the embodiments, an exhaust gas heating interlayer is provided on the exhaust pipe, the inlet of the exhaust gas heating interlayer is connected with the outlet of the swirl heating interlayer, and the outlet of the exhaust gas heating interlayer is connected with the condensate inlet of the condensation chamber.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. The above-mentioned oily sludge treatment system is provided with a sludge dehydration and deoiling device, a cyclone separation device and an exhaust gas treatment device, wherein the sludge dehydration and deoiling device is provided with a primary heating chamber, a secondary heating chamber and a condensing chamber for dehydrating and deoiling the sludge, the cyclone separation device is used to separate the three components of oil, gas and water by cyclone, and the exhaust gas treatment device is used to purify the separated gas so that it can be directly released into the atmosphere, and at the same time, sludge dehydration, oily liquid recovery and exhaust gas purification are realized; during use, the primary sludge first enters the primary heating chamber for heating and dehydration to obtain primary sludge and primary gas, and the primary sludge then enters the secondary heating chamber to heat and crack the heavy oil in the primary sludge to obtain secondary sludge and secondary gas, the secondary sludge is the sludge obtained by the final treatment, and the primary Both the primary gas and the secondary gas enter the condensing chamber, and the primary gas and the secondary gas are cooled to obtain an oil-water gas mixture; then the oil-water gas mixture enters the cyclone separation device, and is separated by rotation in the cyclone cylinder to obtain tail gas, oil and water. The oil flows out of the cyclone cylinder for recovery, and the water is directly discharged from the cyclone cylinder. The tail gas finally enters the tail gas cylinder to purify the acidic waste gas components in the tail gas, and obtains clean and pollution-free gas to be discharged into the air; therefore, the oil-containing sludge treatment system realizes the integrated treatment of sludge dehydration, oil-containing liquid recovery and tail gas purification, and the sludge dehydration and deoiling device is provided with a primary heating chamber and a secondary heating chamber, which not only realizes the continuous separation of water and oil in the sludge and improves the sludge treatment efficiency, but also enables the secondary heating chamber to utilize the heat of the primary heating chamber, saving the operation and treatment cost.

[0023] 2. The sludge dewatering and deoiling device realizes the sequential arrangement of the condensing chamber, the secondary heating chamber and the primary heating chamber by arranging a condensing cylinder, a secondary heating cylinder and a primary heating cylinder which are arranged in sequence, and the secondary heating cylinder is rotatably connected to the primary heating cylinder, and the condensing cylinder is rotatably connected to the secondary heating cylinder, a first spiral blade is arranged on the outer wall of the secondary heating cylinder, and a second spiral blade is arranged on the outer wall of the condensing cylinder. Therefore, a vortex can be formed in the primary heating chamber and the secondary heating chamber through the rotation of the secondary heating cylinder and the condensing cylinder, thereby increasing the residence time of the primary sludge in the primary heating chamber and the primary sludge in the secondary heating chamber, thereby improving the sludge dewatering and heavy oil cracking efficiency.

[0024] 3. Furthermore, the central stirring rod in the cyclone cylinder is connected to the rotary drive assembly, and the central stirring rod is connected to the treatment filler, which can not only stir the fluid in the cyclone cylinder, but also drive the treatment filler to stir the fluid in the exhaust cylinder, so that one rotary drive assembly can simultaneously drive the secondary heating cylinder, condensation cylinder, central stirring rod and treatment filler to rotate, which not only improves the treatment efficiency, but also saves electricity for cyclone driving, effectively reduces the sludge treatment cost, and improves the enterprise's production energy efficiency ratio.

[0025] 4. The condensing coil is used in the condensing chamber to cool the primary gas and the secondary gas, and the condensing vertical pipe is used to transport the condensed oil-water gas mixture, which not only improves the condensation effect, but also saves the space required for the condensing chamber.

[0026] 5. The cyclone cylinder is provided with a cyclone heating interlayer, the sludge container is provided with a sludge heating interlayer, and the tail gas cylinder is provided with a tail gas heating interlayer, all of which are used to accommodate the condensate after heat exchange with the primary gas and the secondary gas in the condensation chamber. That is, the waste heat of the condensate is used to heat the sludge heating interlayer, the cyclone cylinder and the tail gas cylinder, thereby realizing sludge insulation, heating of the oil-water-gas mixture and heating of the tail gas. The primary sludge in the sludge container is kept warm to ensure smooth cracking in the secondary heating chamber, which is beneficial to the rapid separation of oil-water-gas in the cyclone cylinder, improves the decarbonization, denitrification and desulfurization efficiency in the tail gas cylinder, and makes full use of the waste heat to effectively save heating energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a first stereoscopic diagram of the oily sludge treatment system of the present invention.

[0028] Figure 2 It is a second stereoscopic diagram of the oily sludge treatment system of the present invention.

[0029] Figure 3 It is a cross-sectional view of the sludge dewatering and deoiling device in the present invention.

[0030] Figure 4 It is a cross-sectional view of the cyclone separation device in the present invention.

[0031] Figure 5 For the present invention Figure 3 A partial enlarged view of the sludge dewatering and deoiling device.

[0032] Figure 6 For the present invention Figure 4 A partial enlarged view of the cyclone separation device.

[0033] Reference numerals: 100, oily sludge treatment system; 10, sludge dehydration and deoiling device; 11, condensation chamber; 12, secondary heating chamber; 121, second spiral blade; 13, primary heating chamber; 131, first spiral blade; 14, condensation cylinder; 141, condensation coil; 142, condensation vertical pipe; 143, condensation electric submersible pump; 144, stirring spiral blade; 145, gas hole; 15, secondary heating cylinder; 151, secondary heating element; 16, primary heating cylinder; 161, primary heating element; 17, rotation drive assembly; 171, rotating motor; 172 , reducer; 173, transmission belt; 18, sludge container; 181, sludge heating interlayer; 182, primary sludge tank; 183, secondary sludge tank; 20, cyclone separation device; 21, cyclone cylinder; 22, central stirring rod; 221, third spiral blade; 23, overflow pipe; 231, fourth spiral blade; 24, cyclone heating interlayer; 25, temperature and flow controller; 26, fifth spiral blade; 30, exhaust gas treatment device; 31, exhaust cylinder; 32, treatment filler; 33, air intake vertical pipe; 34, amine water inlet pipe; 35, exhaust gas heating interlayer. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0035] like Figures 1 to 4 As shown, in one embodiment, an oily sludge treatment system 100 is provided, comprising a sludge dewatering and deoiling device 10, a cyclone separation device 20 and an exhaust gas treatment device 30;

[0036] The sludge dehydration and deoiling device 10 comprises a condensation chamber 11, a secondary heating chamber 12 and a primary heating chamber 13 which are sequentially arranged. The primary heating chamber 13 is provided with a sludge inlet which is connected to the outside. The primary heating chamber 13 is used to heat and dehydrate the primary sludge to obtain primary sludge and primary gas. The sludge inlet of the secondary heating chamber 12 is connected to the sludge outlet of the primary heating chamber 13. The secondary heating chamber 12 is used to heat and crack the oil in the primary sludge to obtain secondary sludge and secondary gas. The condensation inlet of the condensation chamber 11 is respectively connected to the gas outlets of the primary heating chamber 13 and the secondary heating chamber 12, and is used to cool the primary gas and the secondary gas to obtain an oil-water-gas mixture.

[0037] Furthermore, the cyclone separation device 20 includes a cyclone tube 21, the inlet of which is connected to the condensation outlet of the condensation chamber 11, and is used to separate oil, gas and water from the oil-water-gas mixture. The cyclone tube 21 has an air outlet, an oil outlet and a water outlet.

[0038] Meanwhile, the tail gas treatment device 30 comprises a tail gas cylinder 31, the air inlet of the tail gas cylinder 31 is connected with the air outlet of the cyclone cylinder 21, and the tail gas treatment device 30 is used for purifying the acidic waste gas components in the tail gas.

[0039] The above-mentioned oily sludge treatment system 100 is provided with a sludge dehydration and deoiling device 10, a cyclone separation device 20 and an exhaust gas treatment device 30, wherein the sludge dehydration and deoiling device 10 is provided with a primary heating chamber 13, a secondary heating chamber 12 and a condensing chamber 11, which are used to dehydrate and deoil the sludge, the cyclone separation device 20 is used to separate the three components of oil, gas and water by cyclone, and the exhaust gas treatment device 30 is used to purify the separated gas so that it can be directly released into the atmosphere, and at the same time, sludge dehydration, oil-containing liquid recovery and exhaust gas purification are achieved; during use, the primary sludge first enters the primary heating chamber 13 for heating and dehydration to obtain primary sludge and primary gas, and the primary sludge then enters the secondary heating chamber 12, and the heavy oil in the primary sludge is heated and cracked to obtain secondary sludge and secondary gas, the secondary sludge is the sludge obtained by the final treatment, and the primary gas The primary gas and the secondary gas both enter the condensing chamber 11, and the primary gas and the secondary gas are cooled to obtain an oil-water gas mixture; then the oil-water gas mixture enters the cyclone separation device 20, and is rotated and separated in the cyclone cylinder 21 to obtain tail gas, oil and water, the oil flows out of the cyclone cylinder 21 for recovery, and the water is directly discharged from the cyclone cylinder 21, and the tail gas finally enters the tail gas cylinder 31 to purify the acidic waste gas components in the tail gas, and obtains clean and pollution-free gas to be discharged into the air; therefore, the oil-containing sludge treatment system 100 realizes the integrated treatment of sludge dehydration, oil-containing liquid recovery and tail gas purification, and the sludge dehydration and deoiling device 10 is provided with a primary heating chamber 13 and a secondary heating chamber 12, which not only realizes the continuous separation of water and oil in the sludge and improves the sludge treatment efficiency, but also enables the secondary heating chamber 12 to utilize the heat of the primary heating chamber 13, saving the operation and processing cost.

[0040] Specifically, Figure 3 As shown, in one embodiment, the sludge dewatering and deoiling device 10 includes a condensing cylinder 14, a secondary heating cylinder 15 and a primary heating cylinder 16 which are arranged in sequence, the area between the primary heating cylinder 16 and the secondary heating cylinder 15 forms a primary heating chamber 13, the area between the secondary heating cylinder 15 and the condensing cylinder 14 forms a secondary heating chamber 12, and a condensing chamber 11 is provided in the condensing cylinder 14.

[0041] Furthermore, if Figure 3 As shown, in one embodiment, a first heating interlayer is provided on the side wall of the first-level heating tube 16, and a first-level heating element 161 is provided in the first heating interlayer; a second heating interlayer is provided on the side wall of the second-level heating tube 15, and a second-level heating element 151 is provided in the first heating interlayer; the heating temperature of the second-level heating element 151 is greater than the heating temperature of the first-level heating element 161, that is, the temperature of the second-level heating chamber 12 is greater than the temperature of the first-level heating chamber 13.

[0042] In this specific embodiment, the first-level heating element 161 and the second-level heating element 151 are both heating resistance wires spirally wound on the side walls. The sludge dewatering and deoiling device 10 also includes a first-level heating control element and a second-level heating control element. The first-level heating control element and the second-level heating control element are both arranged on the top of the first-level heating cylinder 16, and are respectively connected to the first-level heating element 161 and the second-level heating element 151, for controlling the heating temperature of the first-level heating element 161 and the second-level heating element 151.

[0043] Since the primary heating chamber 13 is used to heat and dehydrate the primary sludge, the temperature in the primary heating chamber 13 can be maintained between 150°C and 200°C as needed, and the secondary heating chamber 12 is used to heat and crack the heavy oil in the primary sludge. According to the oil cracking temperature requirements, the temperature in the secondary heating chamber 12 should be maintained between 400°C and 500°C.

[0044] Furthermore, if Figure 3 As shown, in one embodiment, the sludge dewatering and deoiling device 10 also includes a rotary drive component 17, the secondary heating cylinder 15 is rotatably connected to the primary heating cylinder 16, the condensing cylinder 14 is rotatably connected to the secondary heating cylinder 15, a first spiral blade 131 is provided on the outer wall of the secondary heating cylinder 15, and a second spiral blade 121 is provided on the outer wall of the condensing cylinder 14. The rotary drive component 17 is respectively connected to the secondary heating cylinder 15 and the condensing cylinder 14, and is used to drive the secondary heating cylinder 15 and the condensing cylinder 14 to rotate around their central axes.

[0045] Among them, bearings can be arranged between the secondary heating tube 15 and the primary heating tube 16 and between the condensing tube 14 and the secondary heating tube 15 to improve the rotation reliability and sealing performance.

[0046] The sludge dewatering and deoiling device 10 realizes the sequential arrangement of the condensing chamber 11, the secondary heating chamber 12 and the primary heating chamber 13 by arranging a condensing cylinder 14, a secondary heating cylinder 15 and a primary heating cylinder 16 which are arranged in sequence, and the secondary heating cylinder 15 is rotatably connected to the primary heating cylinder 16, and the condensing cylinder 14 is rotatably connected to the secondary heating cylinder 15. A first spiral blade 131 is arranged on the outer wall of the secondary heating cylinder 15, and a second spiral blade 121 is arranged on the outer wall of the condensing cylinder 14. Therefore, a vortex can be formed in the primary heating chamber 13 and the secondary heating chamber 12 through the rotation of the secondary heating cylinder 15 and the condensing cylinder 14, thereby increasing the residence time of the primary sludge in the primary heating chamber 13 and the primary sludge in the secondary heating chamber 12, thereby improving the sludge dewatering and heavy oil cracking efficiency.

[0047] Furthermore, if Figure 1 and Figure 4As shown, in one embodiment, a central stirring rod 22 is provided in the cyclone tube 21 , and a third spiral blade 221 is provided on the central stirring rod 22 . The central stirring rod 22 passes through the cyclone tube 21 and is connected to the rotation drive assembly 17 .

[0048] In this specific embodiment, Figure 1 and Figure 2 As shown, the rotary drive assembly 17 includes a rotating motor 171, a reducer 172, a transmission wheel and a transmission belt 173. The rotating motor 171 is connected to the reducer 172, and the reducer 172 is respectively connected to the secondary heating cylinder 15 and the condensing cylinder 14 through a connecting rod. The reducer 172 is connected to the transmission wheel, and the transmission wheel is connected to the central stirring rod 22 through the transmission belt 173.

[0049] Furthermore, if Figure 4 As shown, in one embodiment, an overflow pipe 23 is provided in the cyclone 21, and an oil outlet of the cyclone 21 is provided at one end of the overflow pipe 23. The volatile oil separated in the cyclone 21 flows out from the overflow pipe 23 and is recovered; a fourth spiral blade 231 can be provided on the overflow pipe 23, and a fifth spiral blade 26 is provided on the inner wall of the cyclone 21, which is used to increase the cyclone intensity of the cyclone 21, thereby improving the oil-gas-water separation efficiency.

[0050] Furthermore, if Figure 4 As shown, in one embodiment, a treatment filler 32 is provided in the tail gas cylinder 31 , the tail gas cylinder 31 is arranged above the cyclone cylinder 21 , and the central stirring rod 22 passes through the cyclone cylinder 21 and is connected to the treatment filler 32 .

[0051] Since the central stirring rod 22 in the cyclone cylinder 21 is connected to the rotary drive assembly 17, and the central stirring rod 22 is connected to the treatment filler 32, it can not only stir the fluid in the cyclone cylinder 21, but also drive the treatment filler 32 to stir the fluid in the exhaust cylinder 31, so that one rotary drive assembly 17 simultaneously drives the secondary heating cylinder 15, the condensing cylinder 14, the central stirring rod 22 and the treatment filler 32 to rotate, which not only improves the treatment efficiency, but also saves the electricity used for cyclone driving, effectively reduces the sludge treatment cost, and improves the enterprise's production energy efficiency ratio.

[0052] Among them, bearings can be arranged between the central stirring rod 22 and the exhaust cylinder 31 and the cyclone cylinder 21 to improve the rotation reliability and sealing performance.

[0053] Furthermore, if Figure 4As shown, in one embodiment, the tail gas cylinder 31 is connected to the cyclone cylinder 21 through an air intake vertical pipe 33, and an amine water inlet pipe 34 is also provided in the tail gas cylinder 31, and the amine water inlet pipe 34 extends into the treatment filler 32. The side wall of the amine water inlet pipe 34 is provided with a plurality of inlet holes for spraying amine liquid to the treatment filler 32, thereby removing sulfur dioxide, nitrogen oxides, carbon dioxide and other acidic waste gas components in the tail gas, and achieving the effect of desulfurization, decarbonization and denitrification. An air outlet is provided at the top of the tail gas cylinder 31, and the purified tail gas flows out from the top of the tail gas cylinder 31 and is discharged into the air.

[0054] Specifically, Figure 3 As shown, in one embodiment, a condensing coil 141 and a condensing vertical pipe 142 are provided in the condensing chamber 11, and the condensing inlet of the condensing coil 141 is respectively connected to the air outlets of the primary heating chamber 13 and the secondary heating chamber 12, and the condensing outlet of the condensing coil 141 is connected to one end of the condensing vertical pipe 142, and the other end of the condensing vertical pipe 142 is connected to the inlet of the cyclone cylinder 21; the condensing chamber 11 is used to accommodate condensate, and has a condensate inlet and a condensate outlet.

[0055] Furthermore, if Figure 3 As shown, in one embodiment, a condensation electric submersible pump 143 is provided between the condensation outlet of the condensation coil 141 and the inlet of the condensation riser 142, which is used to pump the oil-water-gas mixture cooled in the condensation coil 141 into the condensation riser 142, and an oil-gas pump is also provided between the outlet of the condensation riser 142 and the inlet of the cyclone tube 21, and the oil-water-gas mixture enters the cyclone tube 21 through the suction of the oil-gas pump.

[0056] Among them, the condensate inlet of the condensation chamber 11 extends to the bottom of the condensation cylinder 14 through a pipe, and the condensate outlet of the condensation chamber 11 is located at the top of the condensation cylinder 14. The condensate forms a flow path from bottom to top in the condensation chamber 11, which is beneficial to extend the flow path of the condensate, make the contact between the condensate and the tube wall more complete, and improve the cooling effect of the condensate.

[0057] In addition, the condensation inlet of the condensation coil 141 is located at the top of the condensation tube 14, and the condensation outlet of the condensation coil 141 is located at the bottom of the condensation tube 14. The primary gas and the secondary gas enter from the top of the condensation coil 141 to form an oil-water gas mixture which flows out from the bottom of the condensation coil 141, which is exactly opposite to the flow path of the condensate in the condensation chamber 11, which is beneficial to extend the heat exchange time and improve the cooling effect.

[0058] In this specific embodiment, Figure 5As shown, the condensation inlet of the condensation coil 141 extends to the secondary heating chamber 12 and the primary heating chamber 13 through a pipeline, and a gas hole 145 is provided on the pipeline for the primary gas and the secondary gas to flow in. The condensation coil 141 is used in the condensation chamber 11 to cool the primary gas and the secondary gas, and the condensation vertical pipe 142 is used to transport the condensed oil-water-gas mixture, which not only improves the condensation effect, but also saves the space required for the condensation chamber 11.

[0059] Furthermore, if Figure 3 As shown, in one embodiment, a stirring spiral blade 144 is provided on the condensation vertical pipe 142, and the condensation vertical pipe 142 is connected to the rotary drive assembly 17 for stirring the condensate in the condensation chamber 11 to improve the heat exchange convection efficiency.

[0060] Furthermore, if Figure 1 , Figure 2 and Figure 4 As shown, in one embodiment, a cyclone tube 21 is provided with a cyclone heating interlayer 24 , the inlet of the cyclone heating interlayer 24 is connected to the condensate outlet of the condensation chamber 11 , and the outlet of the cyclone heating interlayer 24 is connected to the condensate inlet of the condensation chamber 11 .

[0061] Furthermore, if Figure 2 and Figure 3 As shown, in one embodiment, the sludge dewatering and deoiling device 10 includes a sludge container 18, which is used to accommodate primary sludge and secondary sludge. A sludge heating interlayer 181 is provided on the sludge container 18, and the inlet of the sludge heating interlayer 181 is connected to the condensate outlet of the condensation chamber 11, and the outlet of the sludge heating interlayer 181 is connected to the inlet of the sludge heating interlayer 24.

[0062] In this specific embodiment, Figure 3 As shown, the sludge container 18 is connected to the bottom of the primary heating cylinder 16, and a primary sludge tank 182 and a secondary sludge tank 183 are provided in the sludge container 18, the primary sludge tank 182 is arranged opposite to the sludge outlet of the primary heating chamber 13, and the secondary sludge tank 183 is arranged opposite to the sludge outlet of the secondary heating chamber 12. The sludge container 18 is arranged below the primary heating cylinder 16, and the sludge outlets of the primary heating chamber 13 and the secondary heating chamber 12 are both arranged on the bottom.

[0063] Furthermore, if Figure 1 , Figure 4 and Figure 6 As shown, in one embodiment, an exhaust gas heating interlayer 35 is provided on the exhaust pipe 31 , the inlet of the exhaust gas heating interlayer 35 is connected to the outlet of the swirl heating interlayer 24 , and the outlet of the exhaust gas heating interlayer 35 is connected to the condensate inlet of the condensation chamber 11 .

[0064] In this specific embodiment, Figure 1 and Figure 2 As shown, a temperature and flow controller 25 is also provided between the inlet of the sludge heating interlayer 181 and the condensate outlet of the condensation chamber 11, which is used to control the temperature and flow of the condensate entering the sludge heating interlayer 181, and a temperature and flow controller 25 is also provided between the outlet of the exhaust gas heating interlayer 35 and the condensate inlet of the condensation chamber 11, which is used to control the temperature and flow of the condensate entering the condensation chamber 11.

[0065] The cyclone cylinder 21 is provided with a cyclone heating interlayer 24, the sludge container 18 is provided with a sludge heating interlayer 181, and the tail gas cylinder 31 is provided with a tail gas heating interlayer 35, all of which are used to accommodate the condensate after heat exchange with the primary gas and the secondary gas in the condensation chamber 11, that is, the sludge heating interlayer 181, the cyclone cylinder 21, and the tail gas cylinder 31 are heated by the waste heat of the condensate, thereby realizing sludge insulation, heating of the oil-water-gas mixture and heating of the tail gas, and insulating the primary sludge in the sludge container 18 to ensure smooth cracking in the secondary heating chamber 12, which is beneficial to the rapid separation of oil, water and gas in the cyclone cylinder 21. By heating the tail gas cylinder 31, the reaction process is carried out at a certain temperature, which is more beneficial to the removal of pollutants in the tail gas, and the decarbonization, denitrification and desulfurization efficiency in the tail gas cylinder 31 is improved, and the waste heat is fully utilized to effectively save heating energy consumption.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0067] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0071] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. An oily sludge treatment system, characterized in that: include: A sludge dehydration and deoiling device (10), the sludge dehydration and deoiling device (10) comprising a condensation chamber (11), a secondary heating chamber (12) and a primary heating chamber (13) which are arranged in sequence, the primary heating chamber (13) being provided with a sludge inlet which is connected to the outside, the primary heating chamber (13) being used to heat and dehydrate primary sludge to obtain primary sludge and primary gas, the sludge inlet of the secondary heating chamber (12) being connected to the sludge outlet of the primary heating chamber (13), the secondary heating chamber (12) being used to heat and crack the oil in the primary sludge to obtain secondary sludge and secondary gas, the condensation inlet of the condensation chamber (11) being connected to the gas outlets of the primary heating chamber (13) and the secondary heating chamber (12) respectively, being used to cool the primary gas and the secondary gas to obtain an oil-water-gas mixture; A cyclone separation device (20), the cyclone separation device (20) comprising a cyclone barrel (21), the inlet of the cyclone barrel (21) being connected to the condensation outlet of the condensation chamber (11), and being used for performing oil-gas-water separation on the oil-water-gas mixture, the cyclone barrel (21) having an air outlet, an oil outlet and a water outlet; A tail gas treatment device (30) comprises a tail gas cylinder (31), the air inlet of the tail gas cylinder (31) is connected to the air outlet of the cyclone cylinder (21), and is used for purifying acidic waste gas components in the tail gas.

2. The oily sludge treatment system according to claim 1, characterized in that: The sludge dewatering and deoiling device (10) comprises a condensing cylinder (14), a secondary heating cylinder (15) and a primary heating cylinder (16) which are arranged in sequence, the area between the primary heating cylinder (16) and the secondary heating cylinder (15) forms the primary heating chamber (13), the area between the secondary heating cylinder (15) and the condensing cylinder (14) forms the secondary heating chamber (12), and the condensing chamber (11) is arranged in the condensing cylinder (14).

3. The oily sludge treatment system according to claim 2, characterized in that: A first heating interlayer is provided on the side wall of the first heating tube (16), and a first heating element (161) is provided in the first heating interlayer; a second heating interlayer is provided on the side wall of the second heating tube (15), and a second heating element (151) is provided in the first heating interlayer.

4. The oily sludge treatment system according to claim 2, characterized in that: The sludge dewatering and deoiling device (10) also includes a rotary drive component (17), the secondary heating cylinder (15) is rotationally connected to the primary heating cylinder (16), the condensing cylinder (14) is rotationally connected to the secondary heating cylinder (15), a first spiral blade (131) is provided on the outer wall of the secondary heating cylinder (15), and a second spiral blade (121) is provided on the outer wall of the condensing cylinder (14), and the rotary drive component (17) is respectively connected to the secondary heating cylinder (15) and the condensing cylinder (14) for driving the secondary heating cylinder (15) and the condensing cylinder (14) to rotate around their central axes.

5. The oily sludge treatment system according to claim 4, characterized in that: A central stirring rod (22) is provided in the cyclone cylinder (21), a third spiral blade (221) is provided on the central stirring rod (22), and the central stirring rod (22) passes through the cyclone cylinder (21) and is connected to the rotary drive assembly (17).

6. The oily sludge treatment system according to claim 5, characterized in that: A treatment filler (32) is provided in the tail gas cylinder (31), and the tail gas cylinder (31) is arranged above the cyclone cylinder (21). The central stirring rod (22) passes through the cyclone cylinder (21) and is connected to the treatment filler (32).

7. The oily sludge treatment system according to claim 1, characterized in that: The condensation chamber (11) is provided with a condensation coil (141) and a condensation vertical pipe (142); the condensation inlet of the condensation coil (141) is respectively connected to the air outlet of the first-level heating chamber (13) and the second-level heating chamber (12); the condensation outlet of the condensation coil (141) is connected to one end of the condensation vertical pipe (142); the other end of the condensation vertical pipe (142) is connected to the inlet of the cyclone cylinder (21); the condensation chamber (11) is used to contain condensate, and has a condensate inlet and a condensate outlet.

8. The oily sludge treatment system according to claim 7, characterized in that: The cyclone cylinder (21) is provided with a cyclone heating interlayer (24), the inlet of the cyclone heating interlayer (24) is connected to the condensate outlet of the condensation chamber (11), and the outlet of the cyclone heating interlayer (24) is connected to the condensate inlet of the condensation chamber (11).

9. The oily sludge treatment system according to claim 8, characterized in that: The sludge dewatering and deoiling device (10) comprises a sludge container (18), the sludge container (18) is used to accommodate the primary sludge and the secondary sludge, and the sludge container (18) is provided with a sludge heating interlayer (181), the inlet of the sludge heating interlayer (181) is connected to the condensate outlet of the condensation chamber (11), and the outlet of the sludge heating interlayer (181) is connected to the inlet of the cyclone heating interlayer (24).

10. The oily sludge treatment system according to claim 8, characterized in that: The exhaust pipe (31) is provided with an exhaust gas heating interlayer (35), the inlet of the exhaust gas heating interlayer (35) is connected to the outlet of the swirl heating interlayer (24), and the outlet of the exhaust gas heating interlayer (35) is connected to the condensate inlet of the condensation chamber (11).

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