Method for modifying and upgrading oil sludge fibers

Abstract

The invention discloses a method for modifying and upgrading oil sludge fibers, which comprises the following steps: S1, crushing oil sludge-containing fibers through a crusher to obtain a raw material A for later use; s2, 100 parts of water and 0.5 part of a modifier are injected into a modification purification pool, then the raw material A is sent into the modification purification pool to be purified and stirred, at the moment, the content of fibrous slag balls is smaller than 1%, and slag balls at the bottom are pushed out of the modification purification pool through the bottom and then are lifted to the upper section of the modification purification pool to be discharged through a waste slag belt; s3, the oil sludge fibers with the slag ball content smaller than 1% are pumped into a crude fiber and fine fiber separator through a high-pressure slurry pump, fiber slurry is optimized again in the crude fiber and fine fiber separator, and purer fibers are discharged from the upper section. According to the oil sludge fibers treated by the method, the slag content is less than 0.3%, the fiber purity is greater than 99.5%, the bending resistance of the fibers can be greater than 90 degrees, and the homogenization of the fibers is relatively good. The composite material can be used for aerogel composite materials, sealing gaskets, brake pads, papermaking and other fields with high technical requirements, and the application range is greatly widened.

Description

Technical Field

[0001] The invention relates to the technical field of oil sludge fiber processing, in particular to a method for modifying and improving the quality of oil sludge fibers. Background Art

[0002] Refining and petrochemical generally produces 5% oily sludge, which is made into oily sludge fiber through technology. The fiber made of oily sludge generally has a silica content of about 45%-60%, and a calcium oxide content of 5%-15%. The fiber has a high silica content and the fiber quality is relatively good. However, oily sludge fiber is made by centrifugal and blowing methods. The length of the fiber is uneven. Generally, the length of the fiber is 3cm-50cm. The fiber is divided into three parts: the front section, the middle section and the tail end. The front section is thinner, generally 2-5um, accounting for 80% of the fiber length, the middle section is thicker, generally 5-10um, accounting for 19% of the fiber length, and the tail end is generally known as slag ball. The proportion is determined according to the size of the slag ball. Here, it is calculated as 1%. Because the oily sludge fiber is messy and mixed with slag balls, the appearance and quality are poor and cannot be sold on the market.

[0003] Primary oil sludge fibers are also brittle and hard, and are easily broken, which greatly limits their application. In addition, the fibers contain slag balls, and their appearance and physical properties are poor and cannot be used in the market. The fibers need to be modified and purified to obtain oil sludge fibers with higher value. To this end, we propose a method for modifying and improving the quality of oil sludge fibers. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] Therefore, the purpose of the present invention is to provide a method for modifying and improving the quality of oil sludge fiber, wherein the slag content is less than 0.3%, the fiber purity is greater than 99.5%, the fiber bending resistance can be greater than 90 degrees, and the fiber homogenization is better.

[0006] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions: A method for modifying and improving oil sludge fiber, comprising the following steps: S1: crushing the fiber containing oil sludge by a crusher to obtain raw material A for standby use; S2: 100 parts of water and 0.5 parts of modifier are injected into the modification purification pool, and the modifier and water are fully diluted after stirring to form a solvent suitable for oil sludge fiber modification. Then, the raw material A is sent to the modification purification pool and purified and stirred by the purification device. At this time, the fiber slag ball content is less than 1%. The bottom slag balls are pushed out of the modification purification pool through the bottom, and then lifted to the upper part of the modification purification pool and discharged through the waste slag belt; S3: The oil sludge fibers with slag ball content less than 1% are pumped into the coarse fiber fine fiber separator through a high-pressure slurry pump. The fiber slurry is optimized again in the coarse fiber fine fiber separator. The slag balls adhering to the coarse fibers that have not been removed in the previous stage are optimized again through this stage. The slag balls adhering to the coarse fibers are separated by the coarse fiber fine fiber separator and discharged at the bottom, and the purer fibers are discharged from the upper stage. S4: The oil sludge fibers with higher purity are drained to the slurry storage tank through the pipeline. There is an outlet at the bottom of the slurry storage tank. The qualified fibers flow out to the dewatering plate line through the outlet to remove moisture from the fiber surface; S5: The dehydrated oil sludge fiber is sent to a drying device for further dehydration, and then sent to a packaging device for packaging. After vacuuming, the oil sludge fiber is obtained as a finished product.

[0007] As a preferred embodiment of the method for modifying and upgrading oil sludge fibers described in the present invention, in S1, the fibers of the oily sludge are crushed to 3-10 cm by a crusher.

[0008] As a preferred embodiment of the method for modifying and upgrading oil sludge fiber described in the present invention, in S2, the main component of the modification solvent is a mixture of a dispersant and silicone oil, and the stirring time is 10 min-15 min.

[0009] As a preferred embodiment of the method for modifying and upgrading oil sludge fiber described in the present invention, in S5, an air drying device is used to air dry the oil sludge fiber in a hot air device at 120-140 degrees.

[0010] Compared with the prior art, the invention has the following beneficial effects: the sludge fiber treated by the invention has a residue content of less than 0.3%, a fiber purity of more than 99.5%, a bending resistance of more than 90 degrees, and good fiber homogenization. It can be used in high-tech fields such as sealing pads, brake pads, and papermaking, greatly improving the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in combination with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1This is a schematic diagram of the overall process of a method for modifying and improving oil sludge fiber according to the present invention; Figure 2 It is a schematic diagram of the overall structure of the purification device of the present invention; Figure 3 It is a cross-sectional schematic diagram of the purification device of the present invention; Figure 4 It is a structural schematic diagram of the slag discharge mechanism of the purification device of the present invention; Figure 5 It is a structural schematic diagram of the modification mechanism of the purification device of the present invention. DETAILED DESCRIPTION

[0012] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0013] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0014] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0015] The present invention provides a method for modifying and improving the quality of oil sludge fiber. The oil sludge fiber treated by the process of the present invention has a residue content of less than 0.3%, a fiber purity of greater than 99.5%, a bending resistance of the fiber of greater than 90 degrees, and good fiber homogenization.

[0016] Figure 1 The overall structure diagram of an embodiment of a method for modifying and improving oil sludge fiber according to the present invention is shown. Figure 1 , a method for modifying and improving the quality of sludge fiber in this embodiment comprises the following steps: S1: crushing the fiber containing oil sludge by a crusher to obtain raw material A for standby use; S2: 100 parts of water and 0.5 parts of modifier are injected into the modification purification pool, and the modifier and water are fully diluted after stirring to form a solvent suitable for sludge fiber modification. Then the raw material A is sent to the modification purification pool and purified and stirred by the purification device. At this time, the fiber slag ball content is less than 1%. The bottom slag balls are pushed out of the modification purification pool through the bottom, and then lifted to the upper part of the modification purification pool and discharged through the waste slag belt, and finally transported to the slag yard for treatment through the waste slag belt.

[0017] S3: The oil sludge fiber with slag ball content less than 1% is pumped into the coarse fiber fine fiber separator through a high-pressure slurry pump. The fiber slurry is optimized again in the coarse fiber fine fiber separator. The slag balls adhering to the coarse fiber that are not removed in the previous section are optimized again through this section. The slag balls adhering to the coarse fiber are separated by the coarse fiber fine fiber separator. The fiber diameter is greater than 5μm and discharged from the bottom as coarse fiber. After being packaged by the coarse fiber baler, the purer fiber diameter is less than 5μm and discharged as fine fiber in the upper section; different proportions of coarse fiber can be obtained by adjusting the coarse fiber outlet aperture. For example: the outlet aperture is 2cm-10cm, and the amount of coarse fiber obtained is different. Increasing the number of coarse and fine separators and adjusting the outlet aperture can obtain different amounts of coarse fiber.

[0018] S4: The oil sludge fibers with higher purity are drained to the slurry storage tank through the pipeline. There is an outlet at the bottom of the slurry storage tank. The qualified fibers flow out to the dewatering plate line through the outlet to remove moisture from the fiber surface; S5: The dehydrated oil sludge fiber is sent to a drying device for further dehydration, and then sent to a packaging device for packaging. After vacuuming, the oil sludge fiber is obtained as a finished product.

[0019] Furthermore, in S1, the fibers of the oily sludge are crushed to 3-10 cm by a crusher. According to the calculation that the length of the oily sludge fibers is 3cm-50cm, a crusher with a 3-10cm blade is used for crushing and cutting, and the coarse fibers and slag balls in the middle section can be removed. Because the fibers are disordered, only 70% probability can be calculated as qualified.

[0020] Further, in S2, the main component of the modified solvent is a mixture of dispersant and silicone oil, and the stirring time is 10min-15min, preferably 10min. Take an appropriate amount of polymethylsiloxane, polydimethylsiloxane, water-based lubricant, polycarbonate, and polyvinyl chloride, heat the water to 40-100 degrees, stir for 30min, add sodium hydroxide to adjust the pH value to the pH value suitable for the sludge fiber, generally 7. The modifier solution is continuously injected into the modification purification tank, and the modifier should be maintained at a certain concentration. The modifier solution is grafted onto the fiber surface to increase the flexibility and dispersion of the fiber. The solvent has a better modification effect on fine fibers within 5um, a poor modification effect on fibers larger than 5um, and is ineffective for slag balls. Therefore, fibers larger than 5um should be removed as much as possible through this process.

[0021] Furthermore, in S5, an air drying device is used to air dry the fiber in a hot air device at 120-140 degrees Celsius, preferably 130 degrees Celsius. The high temperature is prevented from damaging the modifier on the fiber surface, and the fiber maintains its properties under the protection of the modifier. The fiber is then sent to a packaging device for packaging, and after vacuuming, the finished sludge fiber is obtained.

[0022] See also Figure 2-5In this embodiment, the purification device includes a modified purification pool 1, a modification mechanism 2 is provided inside the modified purification pool 1, a slag discharge mechanism 3 is provided on one side of the modified purification pool 1, and the slag discharge mechanism 3 extends to the bottom of the modified purification pool 1; The modification mechanism 2 includes a first motor 201, a stirring rod 202, an air pump 203, an air outlet 204, an air inlet interface 205 and a convex point 206. The first motor 201 is arranged at the upper end of the modification purification tank 1, the stirring rod 202 is fixedly connected to the rotating shaft of the first motor 201, the air pump 203 is arranged on the stirring rod 202, the air outlet 204 is opened on the stirring rod 202, the number of the air outlet 204 is several and evenly arranged, the air inlet interface 205 is opened on the air pump 203, and the convex point 206 is arranged on the side wall of the modification purification tank 1, and the number of the convex point 206 is several and evenly arranged.

[0023] The above scheme is adopted: by setting a modification purification pool 1, a modification mechanism 2 and a slag discharge mechanism 3, when in use, firstly, the short fibers are sent into the modification purification pool 1, water and a modifier are injected into the modification purification pool 1, and then the short fibers are modified by the modification mechanism 2, and then the solid residue is discharged through the slag discharge mechanism 3, wherein the modification mechanism 2 includes a first motor 201, a stirring rod 202, an air pump 203, an air outlet 204, an air inlet interface 205 and a convex point 206, after the first motor 201 drives the stirring rod 202 to rotate, the tiny particles adhering to the end of the fiber are discharged through The interaction between the modifier and the airflow increases the flexibility of the fiber and changes the basic characteristics of the slag ball and the fiber. At the same time, the stirring rod 202 promotes the movement of water, and the solution hits the protrusion 206 on the inner wall of the modification purification pool 1 to separate the slag ball from the fiber. The slag ball sinks to the bottom of the pool, and the fiber continues to move with the water flow. At the same time, the modifier in the pool softens and modifies the fiber, and the fiber undergoes a change in quality through the modification. At the same time, through the joint action of the air inlet interface 205, the air pump 203 and the air outlet 204, pressurized gas is introduced into the air outlet 204 on the stirring rod 202, and the stirring rod is divided into two layers, upper and lower. If the pressure gas is controlled at 0.2MPa-3MPa in the stirring rod, the fiber can be lifted by 20cm-50cm. According to the different thickness and quality of the fiber, the fiber can be kept in a suspended state, which can effectively remove the slag balls attached to the end of the fiber. There are air holes on the bearing of the first motor 201. After the air is taken in from the top, pressure is applied to the first motor 201. The gas is released from the aperture in the middle of the bearing and discharged from the air outlet 204 on the stirring 202. The fiber in the water can be suspended while stirring. The bearing adopts a seamless steel pipe with a hole in the middle to pass the pressure gas. By adjusting the motor rotation frequency, adjusting the pressure gas in the pool, and adjusting the water pressure of the fiber solution at the tail end, fibers of different qualities can be obtained. Among the fibers, fine fibers are the majority, accounting for 80%, and coarse fibers are 20%. The above processes can achieve separate recycling.

[0024] refer to Figure 3The slag discharge mechanism 3 includes a first spiral auger 301, a second spiral auger 302, a second motor 303, a third motor 304, a lifting slag port 305 and a slag discharge port 306. The first spiral auger 301 is arranged on the side wall of the modification and purification tank 1, the second spiral auger 302 is arranged at the bottom of the modification and purification tank 1, the second motor 303 is arranged on the first spiral auger 301, the third motor 304 is arranged on the second spiral auger 302, the lifting slag port 305 is opened on the side wall of the modification and purification tank 1, the first spiral auger 301 and the second spiral auger 302 are connected through the lifting slag port 305, and the slag discharge port 306 is opened at the upper end of the first spiral auger 301. The above scheme is adopted: by setting a first spiral auger 301, a second spiral auger 302, a second motor 303, a third motor 304, a lifting slag port 305 and a slag outlet 306, when in use, first the second motor 303 can drive the first spiral auger 301 to rotate, the third motor 304 can drive the second spiral auger 302 to rotate, the second spiral auger 302 can transport the solid residue at the bottom of the modified purification tank 1 into the second spiral auger 302 through the lifting slag port 305, and then discharge the fixed residue through the slag outlet 306 on the second spiral auger 302.

[0025] refer to Figure 2 The top of the modification and purification pool 1 is provided with a fixing frame 4, which is used to fix the first spiral auger 301. A return water pool 5 is provided on the fixing frame 4, which is provided corresponding to the slag outlet 306. A dewatering mesh belt 6 is provided inside the return water pool 5, and the dewatering mesh belt 6 is provided obliquely. The above scheme is adopted: by providing the fixing frame 4, the return water pool 5 and the dewatering mesh belt 6, when in use, the fixing frame 4 can fix the first spiral auger 301 and the return water pool 5, and then when the solid residue enters the return water pool 5, it can be dehydrated by the dewatering mesh belt 6.

[0026] refer to Figure 2 The bottom of the modified purification pool 1 is fixedly connected with a support column 7, and the number of the support columns 7 is four and they are symmetrically arranged. The above scheme is adopted: by arranging the support columns 7, the support columns 7 can provide a supporting effect for the modified purification pool 1 when in use, thereby improving the stability of the modified purification pool 1.

[0027] refer to Figure 3 The side wall of the water return pool 5 is provided with a water return port 8, which is connected to the modification and purification pool 1, and a filter screen is provided in the water return port 8. The above scheme is adopted: by setting the water return port 8, the water in the solid residue can be filtered through the dewatering mesh belt 6 during use, so that the water enters the water return pool 5, and at this time, the water can flow back to the modification and purification pool 1 through the water return port 8, thereby reducing the waste of water resources.

[0028] refer to Figure 2A fixing plate 9 is provided on the fixing frame 4, and the fixing plate 9 is used to fix and support the air pump 203 and the first motor 201. The above scheme is adopted: by providing the fixing plate 9, when in use, the fixing plate 9 can provide a fixing effect for the air pump 203 and the first motor 201, thereby improving the stability of the air pump 203 and the motor.

[0029] Through the purification device, the short fibers are first sent into the modification purification pool, water and modifiers are injected into the modification purification pool, and then the short fibers are modified by the modification mechanism, and then the solid residue is discharged through the slag discharge mechanism, wherein the modification mechanism includes a first motor, a stirring rod, an air pump, an air outlet, an air inlet interface and a convex point. After the stirring rod is driven by the first motor to rotate, the tiny particles adhered to the end of the fiber increase the flexibility of the fiber through the interaction of the modifier and the airflow, and change the basic characteristics of the slag ball and the fiber. At the same time, the stirring rod promotes the movement of water, and the solution hits the convex points on the inner wall of the modification purification pool to separate the slag ball from the fiber. The slag balls sink to the bottom of the pool, and the fibers continue to move with the water flow. At the same time, the modifier in the pool softens and modifies the fibers, and the quality of the fibers changes through the modification. At the same time, through the combined action of the air inlet interface, air pump and air outlet, pressurized gas is introduced into the air outlet on the stirring rod to keep the fibers in a suspended state. There are air holes on the first motor bearing. After air is introduced from the top, pressure is applied to the motor. The gas is released from the aperture in the middle of the bearing and discharged from the air outlet on the stirring. Stirring and discharging at the same time can better suspend the fibers in the water. The bearing adopts a seamless steel pipe with a hole in the middle to pass pressurized gas, which can effectively remove the slag balls attached to the end of the fiber.

[0030] The specific process of separating coarse and fine oil sludge fibers is as follows: Oil sludge fibers are generally divided into the front section, the back section and the tail end, among which the front section fibers are directly 0.2-5um, and the diameter of the back section fibers is greater than 5um. Because the fibers are messy, they cannot be removed individually, and can only be removed by a crusher according to the maximum probability, generally using 3-10cm. The removal rate of the front section, the back section and the tail end is 50%. Because the coarse fibers greater than 5um cannot be softened by the modifier, the fibers are still brittle and hard, the bending resistance of the fibers is less than 60 degrees, and the mass is greater than the fine fibers, so if used in the papermaking field, the coarse fibers need to be removed as much as possible. Three holes are opened on the modified purification pool, divided into upper and lower positions and bottom grooves. In the continuous working stage of the modified purification pool, the cut fibers are divided into three layers according to their quality, the upper layer is the fine fiber layer, the middle and lower layers are the coarse fiber layer, and the bottom of the pool is the slag ball layer. The slag ball layer is pushed out of the pool through the bottom groove, and then lifted to the top of the modified pool for dehydration and slag discharge. The coarse fiber layer is discharged from the lower pipe and opens at 10cm from the coarse-fine separator inlet. The bottom aperture of the coarse-fine separator is generally designed to be 2cm-5cm. Different quantities of coarse fibers can be obtained by adjusting the bottom coarse fiber outlet. Fine fibers are discharged from the upper section of the coarse-fine separator. Due to the disorder of the fibers, fine fibers can only be calculated by probability. Generally, the fine fiber content is greater than 95% for qualified products.

[0031] The formation of oil sludge fiber, coarse and fine fibers is mainly based on the acid-base blending of the raw material formula. If the silicon content in the oil sludge fiber is too high and the calcium content is low, the solution viscosity is large when it melts at high temperature, so the fiber thickness is relatively uneven. The pH can also be adjusted to reduce the viscosity, but when the alkalinity increases, the quality of the fiber decreases. In order to ensure quality, this process can be used to solve it. Generally, after the centrifugal fiber is formed, the fiber end is thicker and the fiber front section is thinner. After passing through the crusher and being broken into 3-10cm, the coarse fiber and the fine fiber are essentially separated. The latter section completes the coarse and fine separation in the modified purification pool in turn. After the fiber is purified and modified, the toughness and flexibility of the fiber are enhanced, and the texture and refinement are better. During the purification process, the number of modified purification pools can be increased according to the output to meet the actual production needs.

[0032] Examples: 1. Slag ball removal rate: implementation case 1. Oil sludge raw silk slag ball content: 20% 2. Clean water stirring and washing without using special equipment and modifier Slag ball content: 15% 3. Add modifier and stir without using special equipment Slag ball content: 5% 4. Add modifier using special equipment Slag ball content: 0.3% Summary: The above data show that the use of special equipment to remove slag balls is more efficient and has obvious effects.

[0033] 2. Coarse fiber removal rate, where the diameter is greater than 5um is coarse fiber: Implementation case 1. Oil sludge raw silk: 20% 2. Clean water stirring and washing without using modifiers and special equipment to remove crude fiber rate: 18% 3. Adding modifiers without using special equipment to remove crude fiber rate: 18% 4. Use special equipment to add modifiers Crude fiber removal rate: 80% Summary: The efficiency of removing crude fiber by using purification equipment is much greater than that without using purification equipment.

[0034] 3. Fracture curvature of oil sludge fiber: 1. Fracture curvature without adding modifier: 40 2. Add 0.1 parts of fracture curvature: 45 3. Add 0.2 parts of fracture curvature: 50 4. Add 0.3 parts of fracture curvature: 60 5. Add 0.5 parts of fracture curvature: >95 Summary: Adding modifiers can effectively enhance the toughness and fracture curvature of oil clay fibers.

[0035] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for modifying and improving oil sludge fiber, characterized in that: The following steps are involved: S1: crushing the fiber containing oil sludge by a crusher to obtain raw material A for standby use; S2: 100 parts of water and 0.5 parts of modifier are injected into the modification purification pool, and the modifier and water are fully diluted after stirring to form a solvent suitable for oil sludge fiber modification. Then, the raw material A is sent to the modification purification pool and purified and stirred by the purification device. At this time, the fiber slag ball content is less than 1%. The bottom slag balls are pushed out of the modification purification pool through the bottom, and then lifted to the upper part of the modification purification pool and discharged through the waste slag belt; S3: The oil sludge fibers with slag ball content less than 1% are pumped into the coarse fiber fine fiber separator through a high-pressure slurry pump. The fiber slurry is optimized again in the coarse fiber fine fiber separator. The slag balls adhering to the coarse fibers that have not been removed in the previous stage are optimized again through this stage. The slag balls adhering to the coarse fibers are separated by the coarse fiber fine fiber separator and discharged at the bottom, and the purer fibers are discharged from the upper stage. S4: The oil sludge fibers with higher purity are drained to the slurry storage tank through the pipeline. There is an outlet at the bottom of the slurry storage tank. The qualified fibers flow out to the dewatering plate line through the outlet to remove moisture from the fiber surface; S5: The dehydrated oil sludge fiber is sent to a drying device for further dehydration, and then sent to a packaging device for packaging. After vacuuming, the oil sludge fiber is obtained as a finished product.

2. The method for modifying and improving oil sludge fiber according to claim 1, characterized in that: In S1, the fibers of the oily sludge are crushed to 3-10 cm by a crusher.

3. The method for modifying and upgrading oil sludge fiber according to claim 1, characterized in that: In S2, the modified solvent is mainly composed of a mixture of a dispersant and silicone oil, and the stirring time is 10 min-15 min.

4. The method for modifying and upgrading oil sludge fiber according to claim 1, characterized in that: In S5, an air drying device is used to air dry the product in a hot air device at 120-140 degrees.

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