CN111302596A - Oil sludge drying treatment system and process - Google Patents
Oil sludge drying treatment system and process Download PDFInfo
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- CN111302596A CN111302596A CN202010144136.5A CN202010144136A CN111302596A CN 111302596 A CN111302596 A CN 111302596A CN 202010144136 A CN202010144136 A CN 202010144136A CN 111302596 A CN111302596 A CN 111302596A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/40—Combinations of devices covered by groups B01D45/00 and B01D47/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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Abstract
The invention relates to an oil sludge drying treatment system which comprises a drying device, a cyclone separation device, a micro powder gas-solid separation device, a gas-water separation and condensation device, a tail gas adsorption device and a vacuum pump system. The invention also provides an oil sludge drying treatment process using the oil sludge drying treatment system. The drying device is used for heating oil sludge and separating water in the oil sludge, the cyclone separation device is used for separating solids in steam generated by heating the oil sludge, the micro powder gas-solid separation device is used for secondarily separating the solids in the steam, the gas-water separation and condensation device is used for spraying tail gas to adsorb and cool, and the tail gas adsorption device is used for secondary adsorption. The invention provides a system and a process which are efficient and safe and can intensively treat a large amount of oil sludge, thereby improving the economy, safety and efficiency of oil sludge treatment.
Description
Technical Field
The invention relates to the technical field of oil sludge drying, in particular to an oil sludge drying treatment system and process.
Background
The oil sludge is oil-containing sludge generated in the oil exploitation process, is large in volume, contains complex organic components in oil, water, sludge and other substances, and has the characteristics of high oil content, high viscosity, complex components, more harmful components and the like. If the oil sludge is left alone, the soil and underground water are seriously polluted, and the generated odor can pollute the air. At present, the domestic treatment method of the oil sludge mainly comprises means such as a stacking method, a landfill method, an incineration method, biological treatment and the like, but due to the respective limitations of the methods, no better process becomes the mainstream. However, from the viewpoint of economy and environmental protection, the technologies of reduction, harmlessness, recycling, and cleanliness of sludge will be the inevitable trends in the development thereof.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a system and a process for efficiently and safely treating a large amount of sludge in a centralized manner, thereby improving the economy, safety and efficiency of sludge treatment.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a fatlute mummification processing system, includes mummification device, cyclone, miropowder gas-solid separation device, gas-water separation condensing equipment, tail gas adsorption device and vacuum pump system, the first feed inlet of mummification device is received and is treated dry fatlute, the drier export of mummification device is used for discharging the fatlute after the drying, the first gas outlet of mummification device with cyclone's second feed inlet intercommunication, cyclone's second discharge gate with miropowder gas-solid separation device's third feed inlet intercommunication, miropowder gas-solid separation device's third discharge gate with gas-water separation condensing equipment's fourth feed inlet intercommunication, gas-water separation condensing equipment's fourth discharge gate with tail gas adsorption device's fifth feed inlet intercommunication, tail gas adsorption device's fifth gas outlet with vacuum pump system's sixth air inlet intercommunication, and a sixth gas outlet of the vacuum pump system is communicated with a gas supplementing port of the drying device.
The invention has the beneficial effects that: the drying device is used for heating oil sludge and separating water in the oil sludge, the cyclone separation device is used for separating solids in steam generated by heating the oil sludge, the micro powder gas-solid separation device is used for secondarily separating the solids in the steam, the gas-water separation and condensation device is used for spraying tail gas to adsorb and cool, and the tail gas adsorption device is used for secondary adsorption. The cyclone is commercially available and is a device for the separation of gas or liquid solids. The working principle is that solid particles with larger inertial centrifugal force are thrown to the outer wall surface to be separated by the rotating motion caused by tangential introduction of air flow. Is a separation device with wide industrial application. The waste gas with the temperature of 85-95 ℃ enters the cyclone separation area through the equipment inlet, after the impurity-containing gas enters the cyclone separation pipe along the axial direction, the airflow is strongly rotated under the guide effect of the guide vanes, the airflow spirally enters the cyclone cylinder body downwards along the cylinder body, dust particles with high density are thrown to the wall of the equipment under the action of centrifugal force, and fall along the cylinder wall and flow out of the cyclone pipe dust discharge port to the bottom of the equipment under the action of gravity to be discharged through the electric drawing plate valve. The rotating airflow is contracted in the cylinder body and flows to the center, a secondary vortex is formed upwards, flows to a cyclone outlet through an air duct, and is discharged by a system induced draft fan after passing through a condenser. The collection rate of a material collector of the cyclone separation device is more than or equal to 92 percent. The drying device, the cyclone separation device, the micro powder gas-solid separation device, the gas-water separation and condensation device, the tail gas adsorption device and the vacuum pump system are sequentially connected through pipelines, and the communication of all parts related to the device is realized through conventional and universal pipelines.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, still include preprocessing device, preprocessing device includes powder conveyor, mud storage device and mixing arrangement, powder conveyor is used for holding modifier dry powder, and carry it to mixing arrangement, mud storage device is used for storing fatlute raw materials, and carries it to mixing arrangement, mixing arrangement will modifier dry powder with fatlute mixes and carries it to the mummification device. Specifically, the powder conveying device is purchased from a commercially available dust gas conveyor, and the mixing device is purchased from a commercially available solid mixer.
Further, preprocessing device still includes feed bin transfer device, feed bin transfer device sets up mixing arrangement with on the pipeline between the mummification device for the transfer holds and has added modifier dry powder and stirring after the modification fatlute. Sludge storage device and feed bin transfer device all include hourglass hopper-shaped feed bin, feed bin upper end opening, and its lower extreme is equipped with the discharge gate that communicates with mud plunger pump.
The beneficial effect of adopting the further scheme is that: the pretreatment device adds drugs to the fatlute in advance according to a certain proportion and mixes the steps, thereby improving the drying efficiency of the subsequent drying device and preparing for subsequent further treatment. After the modifier dry powder is added into the oil sludge and fully mixed, the dehydration performance of the oil sludge is greatly improved, and the modified oil sludge is changed into loose, dry and powdery solid fuel through simple heating and drying, so that the oil sludge is more beneficial to combustion and subsequent treatment; the small molecules in the oil sludge are polymerized into a new substance by the oil sludge modifier through a polymerization reaction, so that part of volatile substances in the oil sludge are stabilized, the volatile substances and the stink cannot be generated in the heating process, and secondary pollution cannot be generated; the colloid and the asphaltene in the oil sludge are polymerized with the oil sludge modifier through free radical reaction, polar reaction, redox reaction and the like, so that the oil sludge is variable, loose, porous and light, and can not generate thick black smoke in the combustion process and pollute the atmosphere.
The drying device is connected with the vacuum pump system through a tee joint, the drying device is connected with the vacuum pump system through an additional pipeline, the drying device is connected with the vacuum pump system through a gas supplementing port of the vacuum pump system, the gas supplementing port of the drying device is connected with a sixth gas outlet of the vacuum pump system through a tee joint, and the explosion threshold value of the buffer tank is lower than that of the additional pipeline.
The beneficial effect of adopting the further scheme is that: the system is also provided with a safety device: the system (in the drying device) is provided with an oxygen content monitoring port, a nitrogen supplementing port for filling nitrogen into the system, and a buffer tank; the control system adopts the most advanced explosion-proof safety system. The buffer tank can prevent the drying device from playing a buffering role when the oxygen content exceeds the standard in the micro-negative pressure long-term working process. The explosion event is avoided, and the buffer tank is used as a safety defense standby device to improve the safety of the whole oil sludge drying system. The vacuum pump system can timely supplement gas into the drying device. When the situation that the oxygen content in the drying device exceeds the standard is monitored, a valve of the buffer tank is opened, a feeding valve and an air inlet valve which are communicated with the drying device are closed, meanwhile, a nitrogen valve is filled into the drying device and opened, the nitrogen which is filled into the system reduces the oxygen content, when the oxygen content reaches a safety value, the feeding valve and the air inlet valve are opened, and the valve of the buffer tank is closed.
Further, the mummification device includes the tube-shape casing that the axis level set up, the coaxial hollow (mixing) shaft that is equipped with in the casing, (mixing) shaft one end is stretched out casing one end lateral wall and is connected with first drive arrangement transmission, the (mixing) shaft is in its periphery of part in the casing is equipped with the hollow disc piece of heliciform, the (mixing) shaft is in rotate under first drive arrangement's the drive, casing one end is equipped with first feed inlet, and the other end is equipped with the drier export, and its wall body upper end is close to the position of first feed still is equipped with first gas outlet, hollow (mixing) shaft with be equipped with the hot medium in the hollow disc piece, the casing outer wall encloses and is equipped with the cover, also be equipped with the.
The beneficial effect of adopting the further scheme is that: the oily sludge modified by the mixing system enters a drying device through conveying equipment, is stirred, heated and dried between a shell and a hollow shaft through a rotating hollow disc sheet, and is pushed to the other end of a cylinder to discharge sludge; the saturated steam in the dryer indirectly heats the sludge through a jacket, a hollow shaft and a hollow disc on the shaft, and then is condensed and discharged through drainage for reuse; heating sludge to evaporate water and simultaneously generating tail gas, removing dust through a cyclone dust collector, and carrying out condensation of the tail gas through a condenser and then carrying out discharge through a draught fan. The drier uses steam, hot water or heat conducting oil as heating medium, and the shaft end is provided with a rotary joint for leading in and out the heat medium. The heating medium is divided into two paths which respectively enter the shell jacket of the drying machine, the inner cavity of the hollow shaft and the hollow blades, the device, the blades and the shaft are heated simultaneously, and the sludge is heated and dried in a conduction heating mode. The dried wet base material is continuously fed into the feed inlet of the drier by the quantitative conveying system, and after the material enters the drier, the material is overturned and stirred by the rotation of the hot blade, the heating interface is continuously changed, and the material is contacted with the device and the blade, and is fully heated, so that the surface moisture contained in the sludge is evaporated. Meanwhile, the materials are conveyed to the discharge port along the spiral track formed by the rotation of the paddle shaft, and are continuously stirred during conveying, so that the moisture seeped from the sludge is continuously evaporated. Finally, the dried product is dried into uniform qualified products and discharged from a discharge hole. (1) The device has compact structure and small floor area. According to the structure of the equipment, the heat required by the drying is mainly provided by the wall surface of the hollow blade arranged on the hollow shaft and the wall surface of the barrel jacket. The heat transfer area of the equipment in unit volume is large, the floor area of the equipment can be saved, and the capital investment is reduced; (2) the heat utilization rate is high. The drier adopts a conduction heating mode for heating, all heat transfer surfaces are covered by materials, and the heat loss is reduced; no air takes away heat, and the heat utilization rate can reach more than 85 percent; (3) the hollow blade has self-cleaning capability and can improve the conduction function of the blade. The inclined plane of the rotating paddle and the particles or the powder layer move together to generate a dispersing force, so that the materials attached to the heating inclined plane are automatically removed, and the paddle keeps a high-efficiency heat transfer function, thereby further improving the heat transfer effect. (4) Because the gas is not needed for heating, only a small amount of gas is needed to take away the wet air, the gas velocity in the dryer is low, the dust carried out by the gas is less, and the gas dust of the system after drying is convenient to recover. (5) The adaptability of the water content of the material is wide, and the drying uniformity of the product is high. The rotating speed of the drier is controlled by frequency conversion, the side overflow discharge port is arranged, and the retention time of the material in the drier can be adjusted according to the material property and the drying condition so as to adapt to the requirement of the change of the water content of the material. In addition, the feed rate, the speed of rotation of the shaft and the temperature of the heat carrier can be adjusted, and the residence time can be selected arbitrarily between a few minutes and a few hours. Therefore, the adaptability to the change of the water content of the material is very wide, and the water content of the oil sludge after standard treatment is below 30 percent.
Further, miropowder gas-solid separator includes cyclone and adsorption tank, be equipped with the cyclone oar in the cyclone, the cyclone oar rotates under second drive arrangement's drive, and its lower extreme with the upper end intercommunication of adsorption tank, the cyclone upper end is equipped with the third discharge gate, and its lateral wall top is equipped with the third feed inlet, adsorption tank lateral wall upper portion is equipped with the water inlet, and the diapire is equipped with first delivery port.
The beneficial effect of adopting the further scheme is that: the waste gas discharged by the cyclone separation device also contains a certain amount of micro powder, if the micro powder in the waste gas is not reduced in advance, the cooling effect of the downstream gas-water separation condensation device can be influenced, the tube side material accumulation or blockage of the gas-water separation condensation device is caused in serious cases, the cooling effect is reduced or the maintenance intensity is increased, and the stability of the system operation is influenced. The micro powder gas-solid separation device adopts a two-stage micro powder gas-solid separation mode, micro powder and other substances carried in waste gas can be released to the water surface of the lower part through high-speed spiral centrifugal force (provided by a cyclone paddle), moisture of the micro powder is absorbed instantly in the process that the micro powder in the waste gas is contacted with the water surface, and the waste gas with less micro powder content is discharged from an exhaust port and enters a downstream gas-water separation condensing device. When the concentration of accumulated liquid at the bottom of the fine powder gas-solid separator reaches a certain level, the liquid level can rise to an upper line warning water level, an upper line warning water level controller can feed back the blow-down valve to automatically blow down, when the blow-down valve is opened, the liquid level can fall to a lower line water level, and when the lower line water level falls to a lower line warning mechanical line, the lower line water level controller feeds back to the water supplementing control valve to supplement water, and when the water supplement reaches a designed water level warning line, the water supplement is finished.
Further, the gas-water separation condensing equipment includes spray passage and receipts fluid reservoir, the spray passage upper end is equipped with the shower head, the water inlet of shower head passes through high pressure water pump and spray water tank intercommunication, be equipped with the adsorption packing in the spray passage, the spray passage lower extreme with receive the fluid reservoir intercommunication, it is equipped with the second delivery port to receive the fluid reservoir diapire, fourth feed inlet and fourth discharge gate set up respectively the both sides of spray passage upper end, and are located the below of shower head.
The beneficial effect of adopting the further scheme is that: the wet sludge exchanges heat with steam in the dryer, and the moisture and part of the non-condensable gas in the sludge volatilize to form the dryer tail gas. In addition, in order to ensure the negative pressure state in the dryer, ensure the drying efficiency and control the on-site odor diffusion, a certain amount of air is used as carrier gas in the drying process to carry out water vapor generated by sludge drying. Because the tail gas contains a large amount of water vapor, if the tail gas is directly sent into the furnace, the stability and the combustion performance of a combustion system can be influenced, so that the steam in the volatile gas is condensed into water by adopting the gas-water separation condensing device, the humidity of the tail gas is reduced, and then the non-condensable gas is sent into the furnace. And after the dried tail gas is dedusted by the cyclone separation device, the dried tail gas is cooled by the gas-water separation and condensation device, and a small amount of non-condensable gas and air are sent to the boiler for high-temperature combustion through the induced draft fan. The design in the prior art is that the waste gas is recycled, the waste gas is conveyed to a boiler to be highly burnt, and the second situation is that the waste gas generated by the owner does not need to be recycled and recycled into drying equipment when the owner has the boiler or a tail gas treatment system, and is directly externally discharged. And after saturated water vapor in the tail gas is cooled by a tail gas condenser, the condensed wastewater is discharged to a wastewater station. The tail gas is recycled, and does not need to be discharged outside, and if a boiler or a tail gas treatment system is arranged on the site, the tail gas can be guided into the tail gas treatment system, so that the tail gas recycling and a buffer tank are not needed.
In addition, the invention also comprises an oil sludge drying treatment process which is carried out by using the oil sludge drying treatment system, and the oil sludge drying treatment process comprises the following steps:
1) mixing the oil sludge with the modifier dry powder for modification treatment;
2) conveying the oil sludge treated in the step 1) to the drying device for drying, discharging the dried oil sludge from the drier outlet, and discharging waste gas containing volatile gas, water vapor and micro powder from a gas outlet of the drying device;
3) and 2) treating the waste gas sequentially by the cyclone separation device, the micro powder gas-solid separation device, the gas-water separation and condensation device and the tail gas adsorption device, and recycling the waste gas to the drying device through the vacuum pump system. Thereby realizing zero emission of tail gas.
Specifically, the dosage of the modifier dry powder is 2-10% by mass of the oil sludge. Wherein the water content of the sludge after drying is 30% or less.
Compared with the prior art, the invention has the beneficial effects that: the device and the process can realize safe and automatic control, ensure on-line monitoring, real-time monitoring, remote monitoring and the like, know the field condition of system engineering operation within 24 hours, ensure safety and maximally reduce labor intensity. Meanwhile, the device and the process have high oil sludge treatment efficiency and less three-waste emission, and can better meet the national policy of energy conservation and emission reduction.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a front view of an oil sludge drying treatment system according to an embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a drying device; 2. a cyclonic separating apparatus; 3. a micro powder gas-solid separation device; 4. a gas-water separation condensing unit; 5. a tail gas adsorption device; 6. a powder conveying device; 7. a sludge storage device; 8. a mixing device; 9. a stock bin transfer device; 10. a buffer tank; 20. a vacuum pump system; 30. a nitrogen gas supplement port; 11. a first feed port; 12. a dry material outlet; 13. a first air outlet; 14. a housing; 15. a stirring shaft; 16. a first driving device; 17. a hollow disk sheet; 18. a gas replenishment port; 21. a second feed port; 22. a second discharge port; 31. a third feed inlet; 32. a third discharge port; 33. a cyclone passage; 34. an adsorption tank; 35. a cyclone paddle; 41. a fourth feed port; 42. a fourth discharge port; 43. a spray channel; 44. a liquid collecting tank; 45. a shower head; 51. a fifth feed port; 52. a fifth air outlet; 201. a sixth air inlet; 202. and a sixth air outlet.
Detailed Description
The principles and features of the present invention are described below in conjunction with the accompanying fig. 1, which is provided by way of example only to illustrate the present invention and not to limit the scope of the present invention.
As shown in figure 1, the invention provides an oil sludge drying treatment system, which comprises a drying device 1, a cyclone separation device 2, a micro-powder gas-solid separation device 3, a gas-water separation and condensation device 4, a tail gas adsorption device 5 and a vacuum pump system 20 which are sequentially communicated through a pipeline,
the first feed inlet 11 of the drying device 1 receives oil sludge to be dried, the dry material outlet 12 of the drying device 1 is used for discharging dried oil sludge, the first air outlet 13 of the drying device 1 is communicated with the second feed inlet 21 of the cyclone separation device 2, the second discharge port 22 of the cyclone separation device 2 is communicated with the third feed port 31 of the micro powder gas-solid separation device 3, the third discharge hole 32 of the micro powder gas-solid separation device 3 is communicated with the fourth feed hole 41 of the gas-water separation and condensation device 4, the fourth discharge hole 42 of the gas-water separation condensing device 4 is communicated with the fifth feed hole 51 of the tail gas adsorption device 5, the fifth gas outlet 52 of the tail gas adsorption device 5 is communicated with the sixth gas inlet 201 of the vacuum pump system 20, a sixth gas outlet 202 of the vacuum pump system 20 is communicated with the gas supplementing port 18 of the drying device 1.
According to the oil sludge drying treatment system, the drying device 1 is used for heating oil sludge and separating moisture in the oil sludge, the cyclone separation device 2 is used for separating solids in steam generated by heating the oil sludge, the micro powder gas-solid separation device 3 is used for secondarily separating the solids in the steam, the gas-water separation and condensation device 4 is used for spraying tail gas to adsorb and cool, and the tail gas adsorption device 5 is used for secondary adsorption. The cyclonic separating apparatus 2 is commercially available and is a device for the separation of gaseous or liquid solids. The working principle is that solid particles with larger inertial centrifugal force are thrown to the outer wall surface to be separated by the rotating motion caused by tangential introduction of air flow. Is a separation device with wide industrial application. The waste gas with the temperature of 85-95 ℃ enters the cyclone separation area through the equipment inlet, after the impurity-containing gas enters the cyclone separation pipe along the axial direction, the airflow is strongly rotated under the guide effect of the guide vanes, the airflow spirally enters the cyclone cylinder body downwards along the cylinder body, dust particles with high density are thrown to the wall of the equipment under the action of centrifugal force, and fall along the cylinder wall and flow out of the cyclone pipe dust discharge port to the bottom of the equipment under the action of gravity to be discharged through the electric drawing plate valve. The rotating airflow is contracted in the cylinder body and flows to the center, a secondary vortex is formed upwards, flows to a cyclone outlet through an air duct, and is discharged by a system induced draft fan after passing through a condenser. The collection rate of a material collector of the cyclone separation device is more than or equal to 92 percent.
Preferably, the drying device further comprises a pretreatment device, the pretreatment device comprises a powder conveying device 6, a sludge storage device 7 and a mixing device 8, the powder conveying device 6 is used for containing modifier dry powder and conveying the modifier dry powder to the mixing device 8, the sludge storage device 7 is used for storing oil sludge raw materials and conveying the oil sludge raw materials to the mixing device 8, and the mixing device 8 is used for mixing the modifier dry powder and the oil sludge and conveying the oil sludge to the drying device 1. Specifically, the powder conveying device 6 is obtained from a commercially available dust gas conveyor, and the mixing device 8 is obtained from a commercially available solid mixer.
Preferably, preprocessing device still includes feed bin transfer device 9, feed bin transfer device 9 sets up mixing arrangement 8 with on the pipeline between the mummification device 1 for the transfer holds and has added modifier dry powder and stirring modified the fatlute. Sludge storage device and feed bin transfer device all include hourglass hopper-shaped feed bin, feed bin upper end opening, and its lower extreme is equipped with the discharge gate that communicates with mud plunger pump. The pretreatment device adds medicine to the fatlute in advance according to a certain proportion and mixes the step to modify the fatlute, thereby improving the drying efficiency of the follow-up drying device 1 and preparing for follow-up further treatment.
Preferably, the drying device further comprises a buffer tank 10, the buffer tank 10 is respectively communicated with the gas supplementing port 18 of the drying device 1 and the sixth gas outlet 202 of the vacuum pump system 20 through a tee joint and an additional pipeline connecting the drying device 1 and the vacuum pump system 20, and the blasting threshold value of the buffer tank 10 is lower than that of the additional pipeline. Buffer tank 10 can prevent mummification device 1 with pipeline pressure between the vacuum pump system 20 is too big right mummification device 1 with vacuum pump system 20 causes the damage or takes place the blasting, buffer tank 10 has improved the security of whole fatlute mummification system as the defense backup installation.
Preferably, the drying device 1 includes a cylindrical shell 14 with a horizontal axis, a hollow stirring shaft 15 is coaxially arranged in the shell 14, one end of the stirring shaft 15 extends out of the side wall of one end of the shell 14 and is in transmission connection with a first driving device 16, the stirring shaft 15 is arranged on the periphery of part of the shell 14, the periphery of the part of the shell is provided with a spiral hollow disc sheet 17, the stirring shaft 15 is driven by the first driving device 16 to rotate, one end of the shell 14 is provided with the first feeding hole 11, the other end of the shell is provided with the dry material outlet 12, the position of the upper end of the wall body of the shell, which is close to the first feeding hole 11, is also provided with the first air outlet 13, a heat medium is arranged in the stirring shaft 15 and the hollow disc sheet 17, a jacket is arranged around the outer wall of. The oil-containing sludge modified by the mixing system enters the drying device 1 through a conveying device, is stirred, heated and dried between the shell 14 and the hollow stirring shaft 15 through the rotating hollow disc sheet 17, and is pushed to the other end of the cylinder to discharge sludge; the saturated steam in the dryer indirectly heats the sludge through a jacket, a hollow stirring shaft 15 and an on-shaft hollow disc, and then is condensed and discharged through drainage for reuse; heating sludge to evaporate water and simultaneously generating tail gas, removing dust through a cyclone dust collector, and carrying out condensation of the tail gas through a condenser and then carrying out discharge through a draught fan. The drying device 1 takes steam, hot water or heat conducting oil as a heating medium, and a rotary joint for leading in and out the heat medium is arranged at the shaft end. The heating medium is divided into two paths which respectively enter the shell jacket of the drying machine, the inner cavity of the hollow shaft and the hollow blades, the device, the blades and the shaft are heated simultaneously, and the sludge is heated and dried in a conduction heating mode. The dried wet base material is continuously fed into the feed inlet of the drier by the quantitative conveying system, and after the material enters the drier, the material is overturned and stirred by the rotation of the hot blade, the heating interface is continuously changed, and the material is contacted with the device and the blade, and is fully heated, so that the surface moisture contained in the sludge is evaporated. Meanwhile, the materials are conveyed to the discharge port along the spiral track formed by the rotation of the paddle shaft, and are continuously stirred during conveying, so that the moisture seeped from the sludge is continuously evaporated. Finally, the dried product is dried into uniform qualified products and discharged from a discharge hole. The equipment has the advantages that: (1) the device has compact structure and small floor area. According to the structure of the equipment, the heat required by the drying is mainly provided by the wall surface of the hollow blade arranged on the hollow shaft and the wall surface of the barrel jacket. The heat transfer area of the equipment in unit volume is large, the floor area of the equipment can be saved, and the capital investment is reduced; (2) the heat utilization rate is high. The drier adopts a conduction heating mode for heating, all heat transfer surfaces are covered by materials, and the heat loss is reduced; no air takes away heat, and the heat utilization rate can reach more than 85 percent; (3) the hollow blade has self-cleaning capability and can improve the conduction function of the blade. The inclined plane of the rotating paddle and the particles or the powder layer move together to generate a dispersing force, so that the materials attached to the heating inclined plane are automatically removed, and the paddle keeps a high-efficiency heat transfer function, thereby further improving the heat transfer effect. (4) Because the gas is not needed for heating, only a small amount of gas is needed to take away the wet air, the gas velocity in the dryer is low, the dust carried out by the gas is less, and the gas dust of the system after drying is convenient to recover. (5) The adaptability of the water content of the material is wide, and the drying uniformity of the product is high. The rotating speed of the drier is controlled by frequency conversion, the side overflow discharge port is arranged, and the retention time of the material in the drier can be adjusted according to the material property and the drying condition so as to adapt to the requirement of the change of the water content of the material. In addition, the feed rate, the speed of rotation of the shaft and the temperature of the heat carrier can be adjusted, and the residence time can be selected arbitrarily between a few minutes and a few hours. Therefore, the adaptability to the change of the water content of the material is very wide.
Preferably, miropowder gas-solid separation device 3 includes cyclone 33 and adsorption tank 34, be equipped with cyclone 35 in the cyclone 33, and its lower extreme with adsorption tank 34's upper end intercommunication, cyclone 35 rotates under second drive arrangement's drive, cyclone 33 upper end is equipped with third discharge gate 32, and its lateral wall upper portion is equipped with third feed inlet 31, 34 lateral wall upper portion of adsorption tank is equipped with the water inlet, and the diapire is equipped with first delivery port. Still contain a certain amount of miropowder in the exhaust waste gas of cyclone 3, if do not reduce miropowder in the waste gas in advance, can influence the cooling effect of low reaches gas-water separation condensing equipment 4, cause gas-water separation condensing equipment 4's tube side long-pending material or stifled dead when serious, cause the cooling effect to reduce or the maintenance intensity increases, influence the stability of system operation. The micro powder gas-solid separation device adopts a two-stage micro powder gas-solid separation mode, micro powder and other substances carried in waste gas can be released to the water surface of the lower part through high-speed spiral centrifugal force (provided by a cyclone paddle), moisture of the micro powder is absorbed instantly in the process that the micro powder in the waste gas is contacted with the water surface, and the waste gas with less micro powder content is discharged from an exhaust port and enters a downstream gas-water separation condensing device. When the concentration of accumulated liquid at the bottom of the fine powder gas-solid separator reaches a certain level, the liquid level can rise to an upper line warning water level, an upper line warning water level controller can feed back the blow-down valve to automatically blow down, when the blow-down valve is opened, the liquid level can fall to a lower line water level, and when the lower line water level falls to a lower line warning mechanical line, the lower line water level controller feeds back to the water supplementing control valve to supplement water, and when the water supplement reaches a designed water level warning line, the water supplement is finished.
Preferably, the gas-water separation condensing device 4 comprises a spraying channel 43 and a liquid collecting tank 44, a spraying head 45 is arranged at the upper end of the spraying channel 43, a water inlet of the spraying head 45 is communicated with the spraying water tank through a high-pressure water pump, an adsorption filler is arranged in the spraying channel 43, the lower end of the spraying channel 43 is communicated with the liquid collecting tank 44, a second water outlet is formed in the bottom wall of the liquid collecting tank 44, and a fourth feeding hole 41 and a fourth discharging hole 42 are respectively arranged on two sides of the upper end of the spraying channel 43 and are located below the spraying head 45. The wet sludge exchanges heat with steam in the dryer, and the moisture and part of the non-condensable gas in the sludge volatilize to form the dryer tail gas. In addition, in order to ensure the negative pressure state in the dryer, ensure the drying efficiency and control the on-site odor diffusion, a certain amount of air is used as carrier gas in the drying process to carry out water vapor generated by sludge drying. Because the tail gas contains a large amount of water vapor, if the tail gas is directly sent into the furnace, the stability and the combustion performance of a combustion system can be influenced, so that the steam in the volatile gas is condensed into water by adopting the gas-water separation condensing device, the humidity of the tail gas is reduced, and then the non-condensable gas is sent into the furnace. And after the dried tail gas is dedusted by the cyclone separation device, the dried tail gas is cooled by the gas-water separation and condensation device, and a small amount of non-condensable gas and air are sent to the boiler for high-temperature combustion through the induced draft fan. And after saturated water vapor in the tail gas is cooled by a tail gas condenser, the condensed wastewater is discharged to a wastewater station.
In addition, the invention also comprises an oil sludge drying treatment process which is carried out by using the oil sludge drying treatment system, and the oil sludge drying treatment process comprises the following steps:
1) mixing the oil sludge with the modifier dry powder for modification treatment;
2) conveying the oil sludge treated in the step 1) to the drying device 1 for drying, discharging the dried oil sludge from the drier outlet 12, and discharging waste gas containing volatile gas, water vapor and micro powder from the gas outlet 13 of the drying device 1;
3) and 2) treating the waste gas sequentially through the cyclone separation device 2, the micro powder gas-solid separation device 3, the gas-water separation and condensation device 4 and the tail gas adsorption device 5, and recycling the waste gas to the drying device 1 through the vacuum pump system 20. Thereby realizing the environmental protection standard of zero emission of tail gas.
Preferably, the amount of the modifier dry powder is 2-10% by mass of the oil sludge.
Wherein the water content of the sludge after drying is 30% or less.
Compared with the prior art, the invention has the beneficial effects that: the device and the process can realize automatic control, ensure on-line monitoring, real-time monitoring, remote monitoring and the like, know the field condition of system engineering operation within 24 hours, and reduce labor intensity to the maximum extent. Meanwhile, the device and the process have high oil sludge treatment efficiency and less three-waste emission, and can better meet the national policy of energy conservation and emission reduction.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; the present invention may be readily implemented by those of ordinary skill in the art as illustrated in the accompanying drawings and described above; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (8)
1. A sludge drying treatment system is characterized in that: including mummification device (1), cyclone (2), miropowder gas-solid separation device (3), gas-water separation condensing equipment (4), tail gas adsorption device (5) and vacuum pump system (20), the first feed inlet (11) of mummification device (1) is received and is treated dry fatlute, the drier export (12) of mummification device (1) are used for discharging the fatlute after the drying, first gas outlet (13) of mummification device (1) with second feed inlet (21) intercommunication of cyclone (2), second discharge gate (22) of cyclone (2) with third feed inlet (31) intercommunication of miropowder gas-solid separation device (3), third discharge gate (32) of miropowder gas-solid separation device (3) with fourth feed inlet (41) intercommunication of gas-water separation condensing equipment (4), fourth discharge gate (42) of gas-water separation condensing equipment (4) with the fourth feed inlet (41) intercommunication of tail gas adsorption device (5) Five feed inlets (51) intercommunication, the fifth gas outlet (52) of tail gas adsorption equipment (5) with sixth air inlet (201) intercommunication of vacuum pump system (20), the sixth gas outlet (202) of vacuum pump system (20) with gaseous supplementary mouth (18) intercommunication of mummification device (1).
2. The sludge drying treatment system according to claim 1, further comprising a pretreatment device, wherein the pretreatment device comprises a powder conveying device (6), a sludge storage device (7) and a mixing device (8), the powder conveying device (6) is used for containing modifier dry powder and conveying the modifier dry powder to the mixing device (8), the sludge storage device (7) is used for storing sludge raw material and conveying the sludge raw material to the mixing device (8), and the mixing device (8) mixes the modifier dry powder and the sludge and conveys the sludge to the drying device (1).
3. The oil sludge drying treatment system according to claim 2, wherein the pretreatment device further comprises a storage bin transfer device (9), the storage bin transfer device (9) is arranged on a pipeline between the mixing device (8) and the drying device (1) and used for transferring, containing and adding the modifier dry powder and stirring the modified oil sludge.
4. The sludge drying treatment system according to claim 1, further comprising a buffer tank (10), wherein the buffer tank (10) is respectively communicated with a gas supplementing port (18) of the drying device (1) and a sixth gas outlet (202) of the vacuum pump system (20) through a tee joint and an additional pipeline connecting the drying device (1) and the vacuum pump system (20), and a burst threshold of the buffer tank (10) is lower than that of the additional pipeline.
5. The sludge drying treatment system according to any one of claims 1 to 4, wherein the drying device (1) comprises a cylindrical shell (14) with a horizontal axis, a hollow stirring shaft (15) is coaxially arranged in the shell (14), one end of the stirring shaft (15) extends out of a side wall at one end of the shell (14) and is in transmission connection with a first driving device (16), a spiral hollow disc (17) is arranged on the periphery of part of the stirring shaft (15) in the shell (14), the stirring shaft (15) is driven by the first driving device (16) to rotate, one end of the shell (14) is provided with the first feed inlet (11), the other end of the shell (14) is provided with the dry material outlet (12), the first air outlet (13) is further arranged at a position, close to the first feed inlet (11), and a heat medium is arranged in the stirring shaft (15) and the hollow disc (17), the outer wall of the shell (14) is surrounded by a jacket, and a heat medium is also arranged in the jacket.
6. The oil sludge drying treatment system according to any one of claims 1 to 4, wherein the micro powder gas-solid separation device (3) comprises a cyclone channel (33) and an adsorption tank (34), a cyclone paddle (35) is arranged in the cyclone channel (33), the lower end of the cyclone channel is communicated with the upper end of the adsorption tank (34), the cyclone paddle (35) is driven by a second driving device to rotate, a third discharge hole (32) is formed in the upper end of the cyclone channel (33), a third feed hole (31) is formed in the upper portion of the side wall of the cyclone channel, a water inlet is formed in the upper portion of the side wall of the adsorption tank (34), and a first water outlet is formed in the bottom wall of the adsorption tank.
7. The oil sludge drying treatment system according to any one of claims 1 to 4, wherein the gas-water separation and condensation device (4) comprises a spray channel (43) and a liquid collection tank (44), a spray head (45) is arranged at the upper end of the spray channel (43), a water inlet of the spray head (45) is communicated with the spray water tank through a high-pressure water pump, an adsorption filler is arranged in the spray channel (43), the lower end of the spray channel (43) is communicated with the liquid collection tank (44), a second water outlet is arranged at the bottom wall of the liquid collection tank (44), and the fourth feed inlet (41) and the fourth discharge outlet (42) are respectively arranged at two sides of the upper end of the spray channel (43) and are located below the spray head (45).
8. A sludge drying treatment process using the sludge drying treatment system of any one of claims 1 to 7, comprising the steps of:
1) mixing the oil sludge with the modifier dry powder for modification treatment;
2) conveying the oil sludge treated in the step 1) to a drying device (1) for drying, wherein the dried oil sludge is discharged from a drier outlet (12), and a gas outlet (13) of the drying device (1) discharges waste gas containing volatile gas, water vapor and micro powder;
3) and 2) after the waste gas is sequentially treated by the cyclone separation device (2), the micro powder gas-solid separation device (3), the gas-water separation and condensation device (4) and the tail gas adsorption device (5), the waste gas is recycled to the drying device (1) through the vacuum pump system (20).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010144136.5A CN111302596A (en) | 2020-03-04 | 2020-03-04 | Oil sludge drying treatment system and process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010144136.5A CN111302596A (en) | 2020-03-04 | 2020-03-04 | Oil sludge drying treatment system and process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033662A (en) * | 2020-09-21 | 2020-12-04 | 北京海德利森科技有限公司 | Diaphragm capsule life test system |
| CN114011162A (en) * | 2021-09-28 | 2022-02-08 | 河北邯峰发电有限责任公司 | Biomass coupling power generation system and device |
| CN116913401A (en) * | 2023-07-21 | 2023-10-20 | 大庆亿莱检验检测技术服务有限公司 | Biological method-based oily sludge treatment method |
-
2020
- 2020-03-04 CN CN202010144136.5A patent/CN111302596A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033662A (en) * | 2020-09-21 | 2020-12-04 | 北京海德利森科技有限公司 | Diaphragm capsule life test system |
| CN114011162A (en) * | 2021-09-28 | 2022-02-08 | 河北邯峰发电有限责任公司 | Biomass coupling power generation system and device |
| CN114011162B (en) * | 2021-09-28 | 2023-03-17 | 河北邯峰发电有限责任公司 | Biomass coupling power generation system and device |
| CN116913401A (en) * | 2023-07-21 | 2023-10-20 | 大庆亿莱检验检测技术服务有限公司 | Biological method-based oily sludge treatment method |
| CN116913401B (en) * | 2023-07-21 | 2024-01-02 | 大庆亿莱检验检测技术服务有限公司 | Biological method-based oily sludge treatment method |
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Application publication date: 20200619 |