CN115259592B - Method for cooperatively disposing tank bottom slag oil sludge and chemical sludge filter cake - Google Patents
Method for cooperatively disposing tank bottom slag oil sludge and chemical sludge filter cake Download PDFInfo
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Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
- B01F31/80—Mixing by means of high-frequency vibrations above one kHz, e.g. ultrasonic vibrations
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for cooperatively disposing tank bottom slag oil sludge and chemical sludge filter cakes, which comprises the following steps: 1. stirring the industrial waste alkali liquor and the auxiliary agent to obtain a modified homogenizing agent; 2. mixing tank bottom sludge oil sludge with a chemical sludge filter cake, and performing ultrasonic treatment to obtain a tank bottom sludge oil sludge-chemical sludge filter cake mixture; 3. mixing, heating and stirring the modified homogenizing agent and the tank bottom slag oil sludge-chemical sludge filter cake mixture to obtain fuel slurry. The invention adopts ultrasonic coupling modification homogenizing agent to treat to obtain fuel slurry with low viscosity, good fluidity, good stability and high heat value, and has simple preparation process, low cost and less energy consumption, thereby realizing harmless resource utilization of industrial waste alkali liquid, tank bottom slag oil sludge and chemical sludge filter cakes; the fuel slurry has the characteristics of stability, pumping, atomization performance and the like of liquid fuel, and can be used for replacing coal in a plurality of fields such as chemical production, combustion power generation, gas fuel synthesis and the like.
Description
Technical Field
The invention belongs to the technical field of sludge and sludge treatment, and particularly relates to a method for cooperatively treating tank bottom slag sludge and a chemical sludge filter cake.
Background
The amount of waste resources discharged every year in China is huge, most of waste resources are wasted or idle, and if the waste resources can be efficiently utilized, the method has important significance for ensuring the safety of the resources and reducing the environmental pollution.
In recent years, the global heavy trend of conventional crude oil is obvious, the content of vacuum residuum in crude oil is increased year by year, the content of vacuum residuum in crude oil in China is up to 40% -50%, and the yield is huge. In order to increase the added value of vacuum residuum, researchers have conducted a great deal of research on it, with the most processing techniques adopted by enterprises for delayed coking and residuum catalytic hydrogenation. The waste deposited at the bottom of the storage tank in the process of storing residual oil (referred to as "tank bottom sludge oil sludge") has complex components, contains a large amount of greasy dirt, a small amount of silt, metal salt, sulfide, asphaltene, colloid and other components, has fine particles, serious emulsification, large harm, difficult treatment and the like, is one of the main environmental problems which plague the development of petrochemical enterprises, and is explicitly listed in the "national hazardous waste directory".
The chemical sludge filter cake is another common waste resource existing in chemical enterprises, is a product of biochemical-dehydration drying treatment of chemical wastewater, is composed of active microorganisms, proteins, humic acid, polyacrylamide, polysaccharide substances, heavy metals, polychlorinated biphenyl, dioxin and other substances, contains various refractory organic matters, various heavy metals and inorganic salts, and can cause serious harm to ecological environment and human health when being directly discharged.
At present, the conventional domestic treatment modes of the two wastes mainly comprise landfill, biological treatment, hot washing, incineration, pyrolysis and the like, but the treatment modes have the problems of single treatment, high difficulty, high cost, low efficiency, easiness in secondary pollution and the like, and are difficult to popularize and apply in a large range.
In recent years, along with the continuous improvement of national environmental protection requirements and the continuous deepening of the understanding of harmfulness brought by society to the surrounding environment by wastes, the harmless, stabilizing, reducing and recycling treatment of tank bottom sludge and chemical sludge filter cakes is extremely important.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for cooperatively disposing tank bottom slag oil sludge and chemical sludge filter cakes aiming at the defects of the prior art. According to the invention, the tank bottom sludge oil sludge-chemical sludge filter cake mixture is treated by adopting an ultrasonic technology coupled with the modified homogenizing agent, the viscosity of the fuel slurry is reduced by the activation action of the modified homogenizing agent, a stable space structure is formed by combining the crosslinking action of the chemical sludge filter cake, the stability of the fuel slurry is improved, the fuel slurry with low viscosity, good fluidity, good stability and high heat value is obtained, and the low energy consumption recycling of the two wastes of the tank bottom sludge oil sludge and the chemical sludge filter cake is realized.
In order to solve the technical problems, the invention adopts the following technical scheme: a method for cooperatively disposing tank bottom sludge and chemical sludge filter cakes, which is characterized by comprising the following steps:
step one, preparing a modified homogenizing agent: adding industrial waste alkali liquor and an auxiliary agent into a reaction kettle, and stirring for 0.5-1 h at normal temperature and normal pressure to obtain a modified homogenizing agent;
step two, preprocessing a tank bottom slag oil sludge-chemical sludge filter cake: mixing tank bottom slag oil sludge with a chemical sludge filter cake according to a ratio of 100: mixing the materials according to the mass ratio of 5-15, and then carrying out ultrasonic treatment to uniformly disperse the materials so as to obtain a tank bottom sludge-chemical sludge filter cake mixture; the frequency of the ultrasonic treatment is 24 kHz-40 kHz, and the time is 10 min-20 min;
step three, the cooperative treatment of tank bottom slag oil sludge-chemical sludge filter cake: mixing the modified homogenizing agent obtained in the first step with the tank bottom sludge-chemical sludge filter cake mixture obtained in the second step according to the proportion of 10-20: 100 mass ratio, then adding the mixture into a reaction kettle, heating and stirring the mixture for 0.5 to 1.5 hours at the temperature of between 40 and 60 ℃ to obtain fuel slurry.
The method for cooperatively disposing the tank bottom sludge oil sludge and the chemical sludge filter cake is characterized in that the industrial waste lye in the first step is ethylene waste lye, saponification waste lye or chloroethylene synthesis waste lye. The ethylene waste alkali liquor, the saponification waste alkali liquor or the chloroethylene synthesis waste alkali liquor mainly contains NaOH and Na 2 CO 3 、NaHCO 3 、Na 2 S, alkaline components such as organic acid sodium and the like, and the alkaline components react with acid substances such as naphthenic acid, colloid acid, asphaltene acid and the like in tank bottom residual oil sludge molecules to generate new surface active substances, so that O/W type emulsion is formed by the residual oil sludge and water, and the viscosity of the system is further reduced.
The method for cooperatively disposing the tank bottom sludge oil sludge and the chemical sludge filter cake is characterized in that in the first step, the auxiliary agent is one of polysorbate-80, octoxynol and nonylphenol polyoxyethylene ether, and one of naphthalene sulfonic acid formaldehyde condensate, sodium lignin sulfonate and sodium polystyrene sulfonate according to the proportion of 0.5-2: 1 mass ratio of the compound. The main components of the compound are an emulsifying agent and a dispersing agent, and an auxiliary agent consisting of the two components is a key for preparing fuel slurry, wherein the emulsifying agent effectively reduces the oil-water interfacial tension, so that the viscosity of tank bottom residual oil sludge is reduced, the dispersing agent is low in cost and high in efficiency and has good dispersing performance, the solid phase particles in the tank bottom residual oil sludge and a chemical sludge filter cake and the oil phase in the tank bottom residual oil sludge are fully and uniformly dispersed to form a stable system with uniform three phases of oil, water and solid phase particles, and the prepared fuel slurry has the characteristics of uniform and stable property and good fluidity.
The method for cooperatively disposing the tank bottom sludge oil sludge and the chemical sludge filter cake is characterized in that the mass content of the auxiliary agent in the modified homogenizing agent in the step one is 0.5-1.8%. According to the invention, the mass content of the auxiliary agent in the modified homogenizing agent is controlled to be in the range, so that the viscosity reduction effect is ensured, the fluidity of the slurry is effectively improved, and when the mass content of the auxiliary agent is higher than 1.8%, the viscosity reduction effect of the modified homogenizing agent is not greatly changed, and the cost of the auxiliary agent is increased.
The method for cooperatively disposing the tank bottom sludge oil sludge and the chemical sludge filter cake is characterized in that the chemical sludge filter cake in the second step is a methanol-to-olefin (DMTO) wastewater sludge filter cake, a propylene oxide co-production methyl tert-butyl ether (PO/MTBE) wastewater sludge filter cake or an acrylonitrile wastewater sludge filter cake. The chemical sludge filter cake is adopted as waste for the cooperative treatment with tank bottom residual oil sludge, on one hand, macromolecular compounds such as protein, polyacrylamide, polysaccharide substances and the like contained in the chemical sludge filter cake are entangled into a net structure through molecular chains, oil drops are connected, oil molecules are gathered together, dispersed sludge filter cake solid particles can be crosslinked with each other to form a space structure, particle precipitation is effectively prevented, separation between solid and liquid is prevented, and the stability of a system is enhanced; on the other hand, the fuel slurry has rich organic matters and effectively increased heat value. For the chemical sludge filter cake, the treatment difficulty is high and the efficiency is low by adopting the conventional technology alone, and the method and the tank bottom residual oil sludge are treated cooperatively, so that the utilization rate of the chemical sludge filter cake is effectively improved, the treatment cost is reduced, and the recycling utilization is realized.
The normal temperature and normal pressure in the present invention means 25 to 35 ℃ and 1atm.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the tank bottom sludge oil sludge-chemical sludge filter cake mixture is treated by adopting an ultrasonic technology to couple the modified homogenizing agent, the surface characteristics of the mixture are changed through the synergistic activation of the industrial waste alkali liquid and the auxiliary agent of the modified homogenizing agent, the viscosity of fuel slurry is reduced, and macromolecular compounds such as protein, polyacrylamide, polysaccharide substances and the like contained in the chemical sludge filter cake are entangled into a network structure through molecular chains, so that the dispersed sludge filter cake solid particles are mutually crosslinked to form a space structure, the particle precipitation is effectively prevented, the separation between solid and liquid is prevented, the stability of the fuel slurry is improved, and the fuel slurry with low viscosity, good fluidity, good stability and high heat value is obtained, thereby realizing the low energy consumption and resource utilization of the two wastes of the tank bottom sludge oil sludge and the chemical sludge filter cake.
2. The invention innovatively converts common chemical waste resource industrial waste alkali liquor into a modified homogenizing agent for conditioning the tank bottom sludge-chemical sludge filter cake mixture, and the modified homogenizing agent has simple preparation process and remarkable effect, avoids harm to the environment, realizes resource utilization, and greatly reduces the preparation cost of the modified homogenizing agent.
3. According to the invention, the tank bottom sludge oil sludge-chemical sludge filter cake mixture is pretreated by an ultrasonic method in advance, and the components of the mixture are dispersed by utilizing the ultrasonic reinforced mass transfer effect, so that the particles of a mixture system are effectively dispersed, the viscosity of the mixture is primarily reduced, the viscosity reduction effect of the modified homogenizing agent is enhanced, the stability and uniformity of the tank bottom sludge oil sludge and chemical sludge filter cake, water and modified homogenizing agent mixed system are further improved, and the prepared fuel slurry has good fluidity and better stability.
4. According to the invention, the tank bottom sludge and chemical sludge filter cake mixture is treated by adopting the ultrasonic technology coupling modified homogenizing agent, so that the cooperative treatment of the tank bottom sludge and the chemical sludge filter cake is realized, the treatment efficiency is greatly improved, the treatment period is shortened, the treatment cost is saved, and the defects of single treatment type, long time consumption and redundant treatment process in the traditional tank bottom sludge and chemical sludge filter cake treatment method are overcome.
5. The invention fully utilizes the heat values of two wastes of tank bottom sludge oil sludge and chemical sludge filter cakes, converts the two wastes into the fuel slurry with excellent performance, has low viscosity, good fluidity, good stability and high heat value, can directly replace coal, is used for the fields of chemical production such as methanol, olefin, ammonia, urea and the like, power generation, fuel synthesis such as methane, ethane, ethanol and the like, and has very wide application prospect.
In summary, the method for cooperatively disposing the tank bottom sludge oil sludge and the chemical sludge filter cake provides a brand new idea for disposing organic waste, realizes the recycling of three wastes of industrial waste lye, tank bottom sludge oil sludge and chemical sludge filter cake by a waste disposal way, effectively avoids the problem of environmental pollution of the waste, and achieves the purposes of energy conservation and emission reduction.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a process flow diagram of the method for co-processing tank bottom sludge and chemical sludge filter cake of the invention.
Detailed Description
The judgment of the fluidity of the fuel slurry and the measurement of the water evolution rate prepared in examples 1 to 10 of the present invention respectively adopt a visual measurement method and a test tube method, wherein the measurement of the fluidity of the slurry by the visual measurement method is divided into four grades according to the flowing state of the slurry: class a-linear flow; class B-drop flow; class C-assist force flow: grade d—no flow, "+," indicates better or worse in the same grade; the specific process of the water separation rate measurement is as follows: pouring the slurry into a test tube, standing for 24 hours, measuring the water precipitation amount, and calculating the water precipitation rate to measure the relative stability of the fuel slurry, wherein the smaller the water precipitation rate is, the better the stability of the fuel slurry is.
Example 1
As shown in fig. 1, the present embodiment includes the steps of:
step one, preparing a modified homogenizing agent: compounding polysorbate-80 and sodium lignin sulfonate in a mass ratio of 0.5:1 to obtain an auxiliary agent, adding the auxiliary agent and ethylene waste alkali liquor into a reaction kettle with stirring, and stirring at normal temperature and normal pressure for 0.5h to obtain a modified homogenizing agent; the mass content of the auxiliary agent in the modified homogenizing agent is 0.5%;
step two, preprocessing a tank bottom slag oil sludge-chemical sludge filter cake: mixing tank bottom sludge oil sludge with methanol-to-olefin (DMTO) wastewater sludge filter cake according to the proportion of 100:5, after mixing in mass ratio, carrying out ultrasonic treatment at 24kHz frequency for 10min to uniformly disperse, thus obtaining a tank bottom sludge-chemical sludge filter cake mixture;
step three, the cooperative treatment of tank bottom slag oil sludge-chemical sludge filter cake: mixing the modified homogenizing agent obtained in the first step with the tank bottom sludge-chemical sludge filter cake mixture obtained in the second step according to the following ratio of 10:100 mass ratio, then adding the mixture into a reaction kettle with stirring, and heating and stirring for 0.5h at 40 ℃ to obtain fuel slurry.
According to detection, in the embodiment, the apparent viscosity of the slurry body obtained by mixing tank bottom sludge and a methanol-to-olefin (DMTO) wastewater sludge filter cake is 8433.1 mPa.s, the apparent viscosity of the tank bottom sludge-chemical sludge filter cake mixture obtained by ultrasonic treatment is 4182.5 mPa.s, the viscosity reduction rate is 50.4%, the apparent viscosity of the fuel slurry obtained by treatment with the modified homogenizer is reduced to 541.8 mPa.s, the viscosity reduction rate is 93.6%, the fluidity is class A, the water separation rate is 0.2%, and the heat value is 36690kJ/kg.
Example 2
As shown in fig. 1, the present embodiment includes the steps of:
step one, preparing a modified homogenizing agent: compounding polysorbate-80 and sodium lignin sulfonate in a mass ratio of 0.5:1 to obtain an auxiliary agent, adding the auxiliary agent and ethylene waste alkali liquor into a reaction kettle with stirring, and stirring at normal temperature and normal pressure for 0.5h to obtain a modified homogenizing agent; the mass content of the auxiliary agent in the modified homogenizing agent is 0.8%;
step two, preprocessing a tank bottom slag oil sludge-chemical sludge filter cake: mixing tank bottom sludge oil sludge with methanol-to-olefin (DMTO) wastewater sludge filter cake according to the proportion of 100:5, after mixing in mass ratio, carrying out ultrasonic treatment at 24kHz frequency for 10min to uniformly disperse, thus obtaining a tank bottom sludge-chemical sludge filter cake mixture;
step three, the cooperative treatment of tank bottom slag oil sludge-chemical sludge filter cake: mixing the modified homogenizing agent obtained in the first step with the tank bottom sludge-chemical sludge filter cake mixture obtained in the second step according to the following ratio of 10:100 mass ratio, and then adding the mixture into a reaction kettle with stirring, and heating and stirring for 1.0h at 40 ℃ to obtain fuel slurry.
According to detection, in the embodiment, the apparent viscosity of the slurry body obtained by mixing the tank bottom sludge and a methanol-to-olefin (DMTO) wastewater sludge filter cake is 8433.1 mPa.s, the apparent viscosity of the tank bottom sludge-chemical sludge filter cake mixture obtained by ultrasonic treatment is 4182.5 mPa.s, the viscosity reduction rate is 50.4%, the apparent viscosity of the fuel slurry obtained by treatment with the modified homogenizer is reduced to 499.3 mPa.s, the viscosity reduction rate is 94.1%, the fluidity is class A, the water separation rate is 0.2%, and the heat value is 36710kJ/kg.
Example 3
As shown in fig. 1, the present embodiment includes the steps of:
step one, preparing a modified homogenizing agent: compounding polysorbate-80 and sodium lignin sulfonate in a mass ratio of 1:1 to obtain an auxiliary agent, adding the auxiliary agent and ethylene waste alkali liquor into a reaction kettle with stirring, and stirring for 1h at normal temperature and normal pressure to obtain a modified homogenizing agent; the mass content of the auxiliary agent in the modified homogenizing agent is 1.2%;
step two, preprocessing a tank bottom slag oil sludge-chemical sludge filter cake: mixing tank bottom sludge oil sludge with methanol-to-olefin (DMTO) wastewater sludge filter cake according to the proportion of 100: after mixing in the mass ratio of 10, carrying out ultrasonic treatment at the frequency of 32kHz for 15min to uniformly disperse, thus obtaining a tank bottom sludge-chemical sludge filter cake mixture;
step three, the cooperative treatment of tank bottom slag oil sludge-chemical sludge filter cake: mixing the modified homogenizing agent obtained in the first step with the tank bottom sludge-chemical sludge filter cake mixture obtained in the second step according to the following ratio of 15:100 mass ratio, and then adding the mixture into a reaction kettle with stirring, and heating and stirring for 1.0h at 50 ℃ to obtain fuel slurry.
According to detection, in the embodiment, the apparent viscosity of the slurry body obtained by mixing the tank bottom sludge and a methanol-to-olefin (DMTO) wastewater sludge filter cake is 8203.7 mPa.s, the apparent viscosity of the tank bottom sludge-chemical sludge filter cake mixture obtained by ultrasonic treatment is 3989.1 mPa.s, the viscosity reduction rate is 51.3%, the apparent viscosity of the fuel slurry obtained by treatment with the modified homogenizer is reduced to 440.1 mPa.s, the viscosity reduction rate is 94.6%, the fluidity is class A, the water separation rate is 0.3%, and the heat value is 36200kJ/kg.
Example 4
As shown in fig. 1, the present embodiment includes the steps of:
step one, preparing a modified homogenizing agent: compounding polysorbate-80 and sodium lignin sulfonate in a mass ratio of 2:1 to obtain an auxiliary agent, adding the auxiliary agent and ethylene waste alkali liquor into a reaction kettle with stirring, and stirring for 1h at normal temperature and normal pressure to obtain a modified homogenizing agent; the mass content of the auxiliary agent in the modified homogenizing agent is 1.8%;
step two, preprocessing a tank bottom slag oil sludge-chemical sludge filter cake: mixing tank bottom sludge oil sludge with methanol-to-olefin (DMTO) wastewater sludge filter cake according to the proportion of 100:15, performing ultrasonic treatment at 40kHz frequency for 20min to uniformly disperse to obtain a tank bottom sludge-chemical sludge filter cake mixture;
step three, the cooperative treatment of tank bottom slag oil sludge-chemical sludge filter cake: mixing the modified homogenizing agent obtained in the first step with the tank bottom sludge-chemical sludge filter cake mixture obtained in the second step according to the following ratio of 20:100 mass ratio, then adding the mixture into a reaction kettle with stirring, and heating and stirring at 60 ℃ for 1.5h to obtain fuel slurry.
Through detection, the apparent viscosity of the slurry body obtained by mixing the tank bottom sludge and the methanol-to-olefin (DMTO) wastewater sludge filter cake in the embodiment is 8001.4 mPa.s, and the apparent viscosity of the tank bottom sludge-chemical sludge filter cake mixture obtained by ultrasonic treatment is 3788.4 mPa.s, and the viscosity reduction rate is52.7 percent, the apparent viscosity of the fuel slurry after being treated by the modified homogenizing agent is reduced to 399.4 mPa.s, the viscosity reduction rate is 95.0 percent, and the fluidity is A + Grade, water separation rate is 0.4%, and heat value is 35770kJ/kg.
Example 5
This embodiment differs from embodiment 3 in that: the industrial waste lye adopted in the first step is saponification waste lye.
According to detection, in the embodiment, the apparent viscosity of the slurry body obtained by mixing the tank bottom sludge and a methanol-to-olefin (DMTO) wastewater sludge filter cake is 8203.7 mPa.s, the apparent viscosity of the tank bottom sludge-chemical sludge filter cake mixture obtained by ultrasonic treatment is 3989.1 mPa.s, the viscosity reduction rate is 51.3%, the apparent viscosity of the fuel slurry obtained by treatment with the modified homogenizer is reduced to 461.3 mPa.s, the viscosity reduction rate is 94.4%, the fluidity is class A, the water separation rate is 0.2%, and the heat value is 36050kJ/kg.
Example 6
This embodiment differs from embodiment 3 in that: the industrial waste alkali liquid adopted in the first step is chloroethylene synthesis waste alkali liquid.
According to detection, in the embodiment, the apparent viscosity of the slurry body obtained by mixing the tank bottom sludge and a methanol-to-olefin (DMTO) wastewater sludge filter cake is 8203.7 mPa.s, the apparent viscosity of the tank bottom sludge-chemical sludge filter cake mixture obtained by ultrasonic treatment is 3989.1 mPa.s, the viscosity reduction rate is 51.3%, the apparent viscosity of the fuel slurry obtained by treatment with the modified homogenizer is reduced to 482.1 mPa.s, the viscosity reduction rate is 94.1%, the fluidity is class A, the water separation rate is 0.4%, and the heat value is 36370kJ/kg.
Example 7
This embodiment differs from embodiment 3 in that: in the first step, the octoxynol and naphthalene sulfonic acid formaldehyde condensate are compounded according to the mass ratio of 0.5:1 to obtain the auxiliary agent.
According to detection, in the embodiment, the apparent viscosity of the slurry body obtained by mixing the tank bottom sludge and a methanol-to-olefin (DMTO) wastewater sludge filter cake is 8203.7 mPa.s, the apparent viscosity of the tank bottom sludge-chemical sludge filter cake mixture obtained by ultrasonic treatment is 3989.1 mPa.s, the viscosity reduction rate is 51.3%, the apparent viscosity of the fuel slurry obtained by treatment with the modified homogenizer is reduced to 465.8 mPa.s, the viscosity reduction rate is 94.3%, the fluidity is class A, the water separation rate is 0.3%, and the heat value is 36180kJ/kg.
Example 8
This embodiment differs from embodiment 3 in that: in the first step, the nonylphenol polyoxyethylene ether and the sodium polystyrene sulfonate are compounded according to the mass ratio of 1:1 to obtain the auxiliary agent.
According to detection, in the embodiment, the apparent viscosity of the slurry body obtained by mixing the tank bottom sludge and a methanol-to-olefin (DMTO) wastewater sludge filter cake is 8203.7 mPa.s, the apparent viscosity of the tank bottom sludge-chemical sludge filter cake mixture obtained by ultrasonic treatment is 3989.1 mPa.s, the viscosity reduction rate is 51.3%, the apparent viscosity of the fuel slurry obtained by treatment with the modified homogenizer is reduced to 461.3 mPa.s, the viscosity reduction rate is 94.9%, the fluidity is class A, the water separation rate is 0.2%, and the heat value is 36210kJ/kg.
Example 9
As shown in fig. 1, the present embodiment includes the steps of:
step one, preparing a modified homogenizing agent: compounding nonylphenol polyoxyethylene ether and sodium polystyrene sulfonate according to a mass ratio of 1:1 to obtain an auxiliary agent, adding the auxiliary agent and ethylene waste alkali liquor into a reaction kettle with stirring, and stirring for 1h at normal temperature and normal pressure to obtain a modified homogenizing agent; the mass content of the auxiliary agent in the modified homogenizing agent is 1.2%;
step two, preprocessing a tank bottom slag oil sludge-chemical sludge filter cake: tank bottom sludge and epoxypropane are combined to produce methyl tertiary butyl ether (PO/MTBE) wastewater sludge filter cake according to the following weight ratio of 100: after mixing in the mass ratio of 10, carrying out ultrasonic treatment at the frequency of 32kHz for 15min to uniformly disperse, thus obtaining a tank bottom sludge-chemical sludge filter cake mixture;
step three, the cooperative treatment of tank bottom slag oil sludge-chemical sludge filter cake: mixing the modified homogenizing agent obtained in the first step with the tank bottom sludge-chemical sludge filter cake mixture obtained in the second step according to the following ratio of 15:100 mass ratio, and then adding the mixture into a reaction kettle with stirring, and heating and stirring for 1.0h at 50 ℃ to obtain fuel slurry.
Through detection, the slurry body surface obtained by mixing tank bottom slag oil sludge and epoxypropane co-production methyl tert-butyl ether (PO/MTBE) wastewater sludge filter cake in the embodimentThe viscosity is 8447.2 mPa.s, the apparent viscosity of the tank bottom sludge-chemical sludge filter cake mixture after ultrasonic treatment is 4103.8 mPa.s, the viscosity reduction rate is 51.4%, the apparent viscosity of the fuel slurry after treatment by the modified homogenizer is reduced to 456.2 mPa.s, the viscosity reduction rate is 94.6%, and the fluidity is A + Grade, water separation rate is 0.3%, and heat value is 36770kJ/kg.
Example 10
This embodiment differs from embodiment 9 in that: and step two, the chemical sludge filter cake adopted in the step two is an acrylonitrile wastewater sludge filter cake.
According to detection, in the embodiment, the apparent viscosity of the slurry body obtained by mixing the tank bottom sludge and the acrylonitrile wastewater sludge filter cake is 8677.9 mPa.s, the apparent viscosity of the tank bottom sludge-chemical sludge filter cake mixture obtained by ultrasonic treatment is 4234.6 mPa.s, the viscosity reduction rate is 51.2%, the apparent viscosity of the fuel slurry obtained by treatment with the modified homogenizing agent is reduced to 495.4 mPa.s, the viscosity reduction rate is 94.3%, the fluidity is class A, the water separation rate is 0.4%, and the heat value is 36480kJ/kg.
From the results of the above examples, it is known that the slurry body surface viscosity of the tank bottom sludge and various chemical sludge filter cakes after mixing is higher, the apparent viscosity of the slurry body is reduced after ultrasonic treatment, the apparent viscosity of the obtained fuel slurry is further greatly reduced after treatment by the modified homogenizing agent, the fluidity and stability of the fuel slurry are better, the heat value is higher, and the fuel slurry can directly replace coal and is used for various fields such as chemical production of methanol, olefin, ammonia, urea and the like, power generation, fuel synthesis of methane, ethane, ethanol and the like.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention. Any simple modification, variation and equivalent variation of the above embodiments according to the technical substance of the invention still fall within the scope of the technical solution of the invention.
Claims (4)
1. A method for cooperatively disposing tank bottom sludge and chemical sludge filter cakes, which is characterized by comprising the following steps:
step one, preparing a modified homogenizing agent: adding industrial waste alkali liquor and an auxiliary agent into a reaction kettle, and stirring for 0.5-1 h at normal temperature and normal pressure to obtain a modified homogenizing agent; the auxiliary agent is one of polysorbate-80, octoxynol and polyoxyethylene nonylphenol ether, and one of naphthalene sulfonic acid formaldehyde condensate, sodium lignin sulfonate and sodium polystyrene sulfonate according to 0.5-2: 1 mass ratio of the compound;
step two, preprocessing a tank bottom slag oil sludge-chemical sludge filter cake: mixing tank bottom slag oil sludge with a chemical sludge filter cake according to a ratio of 100: mixing the materials according to the mass ratio of 5-15, and then carrying out ultrasonic treatment to uniformly disperse the materials to obtain a tank bottom sludge-chemical sludge filter cake mixture; the frequency of the ultrasonic treatment is 24 kHz-40 kHz, and the time is 10 min-20 min;
step three, the cooperative treatment of tank bottom slag oil sludge-chemical sludge filter cake: mixing the modified homogenizing agent obtained in the first step with the tank bottom sludge-chemical sludge filter cake mixture obtained in the second step according to the ratio of 10-20: 100 mass ratio, then adding the mixture into a reaction kettle, and heating and stirring the mixture for 0.5 to 1.5 hours at the temperature of 40 to 60 ℃ to obtain fuel slurry.
2. The method for co-disposal of tank bottoms sludge and chemical sludge cake as claimed in claim 1, wherein said industrial waste lye in step one is ethylene waste lye, saponification waste lye or vinyl chloride synthesis waste lye.
3. The method for cooperatively disposing tank bottoms sludge and chemical sludge filter cakes according to claim 1, wherein the mass content of the auxiliary agent in the modified homogenizing agent in the first step is 0.5% -1.8%.
4. The method for cooperatively disposing tank bottoms sludge and a chemical sludge filter cake according to claim 1, wherein in the second step, the chemical sludge filter cake is a methanol-to-olefin (DMTO) wastewater sludge filter cake, a propylene oxide co-production methyl tert-butyl ether (PO)/MTBE) wastewater sludge filter cake, or an acrylonitrile wastewater sludge filter cake.
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