CN213853468U - Hydrothermal liquefaction product separator - Google Patents
Hydrothermal liquefaction product separator Download PDFInfo
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- CN213853468U CN213853468U CN202022617512.6U CN202022617512U CN213853468U CN 213853468 U CN213853468 U CN 213853468U CN 202022617512 U CN202022617512 U CN 202022617512U CN 213853468 U CN213853468 U CN 213853468U
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Abstract
The utility model provides a hydrothermal liquefied product separation device, which comprises a cooler, a high-pressure filter, a back pressure valve, a gas-liquid separator and an oil-water separator; the outlet of the cooler is communicated with a product feeding hole of the high-pressure filter; the inlet and the outlet of the back pressure valve are respectively communicated with a product discharge port of the high-pressure filter and a gas-liquid inlet of the gas-liquid separator; the liquid phase outlet of the gas-liquid separator is communicated with the liquid phase inlet of the oil-water separator. The hydrothermal liquefaction product is cooled by a cooler, then enters a high-pressure filter to remove solid residues, the residue-free product is depressurized by a back pressure valve and then passes through a gas-liquid separator and an oil-water separator to respectively obtain gas phase, water phase and oil phase products.
Description
Technical Field
The utility model relates to a living beings hydrothermal liquefaction technical field especially relates to a hydrothermal liquefaction result separator.
Background
China has rich biomass resources including crop straws, forest wastes, firewood, organic wastes, energy plants, household garbage, municipal sludge, wastewater, livestock and poultry manure and the like. The biomass can be used as a raw material of a hydrothermal liquefaction technology, water is used as a solvent, and a series of thermochemical changes are carried out under the conditions of high temperature of 200-400 ℃ and high pressure of 5-25MPa so as to convert the biomass into the biological crude oil. The biomass resources are treated by the hydrothermal liquefaction technology, the raw materials are not required to be dried, the energy is saved, the hydrothermal liquefaction conversion rate is high, all components of the raw materials can participate in reaction, the reaction is complete, and meanwhile, the biomass resources with low energy density can be converted into the biological crude oil with high energy density. The biological crude oil can be used as a petroleum substitute after the operations of quality improvement, refining and the like, can also be used for producing high value-added chemicals, and has important significance for relieving the problem of fossil energy shortage and the problem of environmental pollution in China. The hydrothermal liquefaction product comprises a gas phase, an oil phase, a water phase and a solid phase, and the components are complex and difficult to directly utilize. At the same time, the moisture content may also result in a lower calorific value of the bio-crude or difficult direct combustion. Although the products of each phase are separated to a certain degree due to different densities and states, the phenomena of tiny solid particles of suspended oil in an oil phase and a water phase, light oil in the water phase and water in the oil phase and the like can occur, and the four-phase products need to be completely separated by a certain technical means, so that the next step of refining of the biological crude oil, improving the oil quality and separating and extracting high value-added small molecular compounds can be carried out, and the effective utilization of hydrothermal products is realized. Therefore, the effective separation of the high-temperature and high-pressure four-phase product is one of the problems to be overcome by the continuous hydrothermal liquefaction system.
At present, domestic research on continuous hydrothermal liquefaction of biomass mainly focuses on the whole continuous reaction system, and mainly introduces equipment and methods of parts such as feeding, a reactor, raw material heating, flow control and the like, and does not specifically introduce a product separation device in detail. A few existing separation devices have limitations on hydrothermal liquefied biomass raw materials; some do not separate the oil and water phases; some backpressure valves are arranged before a product separator, the existence of solid residues can wear the backpressure valves, and the backpressure valves can be blocked to influence the normal operation of the system; some slag discharging processes can not ensure the pressure stability of the system; some adopt centrifugation or extraction separation mode, need equipment such as centrifuge, solvent evaporation, cost and energy consumption are higher. The utility model discloses aim at exploring through mechanical physics method, when guaranteeing pressure stability, improve four-phase result separation efficiency, realize continuous hydrothermal liquefaction result separation, need not centrifugal equipment and the unfriendly chemical reagent of environment, avoid taking place chemical reaction and change the result component between chemical reagent and the result, simultaneously, reduce the cost and drop into, reduce energy consumption.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a hydrothermal liquefaction result separator aims at separating according to the physical property of result to improve result separation efficiency, reduce running cost and energy consumption, simultaneously, guarantee the continuity and the pressure stability of separation process.
The embodiment of the utility model provides a hydrothermal liquefaction product separator, including cooler, high pressure filter, back pressure valve, vapour and liquid separator and oil water separator;
the inlet of the cooler is communicated with the hydrothermal liquefaction reaction system, and the outlet of the cooler is communicated with the product feed inlet of the high-pressure filter;
the inlet and the outlet of the back pressure valve are respectively communicated with the product discharge port of the high-pressure filter and the gas-liquid inlet of the gas-liquid separator;
and a liquid phase outlet of the gas-liquid separator is communicated with a liquid phase inlet of the oil-water separator.
According to the hydrothermal liquefaction product separator of an embodiment of the utility model, the hydrothermal liquefaction product separator still includes the product holding vessel;
the inlet of the cooler is communicated with a product feeding pipeline, a first pressure instrument and a first temperature instrument are arranged on the part, far away from the inlet of the cooler, of the product feeding pipeline, and the part, close to the inlet of the cooler, of the product feeding pipeline is communicated with a first feeding hole of the product collecting tank through a first branch;
the outlet of the cooler is communicated with the product feeding hole of the high-pressure filter through a product discharging pipeline, a second temperature instrument is arranged on the part, close to the outlet of the cooler, of the product discharging pipeline, and the part, close to the product feeding hole of the high-pressure filter, of the product discharging pipeline is communicated with the second feeding hole of the product collecting tank through a second branch;
and the first branch and the second branch are respectively provided with a first rupture disk and a second rupture disk.
According to the hydrothermal liquefaction product separation device of an embodiment of the utility model, the hydrothermal liquefaction product separation device also comprises a slag storage tank;
the slag discharging port of the high-pressure filter is communicated with the slag inlet of the slag storage box through a slag discharging pipeline, and the slag discharging pipeline is provided with a slag discharging valve.
According to the hydrothermal liquefaction product separation device of one embodiment of the utility model, the high-pressure filter comprises a shell and a filter element, the filter element is positioned in the shell, and the filter element is connected with the inner side wall of the top of the shell;
a product feeding hole and a product discharging hole are formed in the top of the shell, the product discharging hole is arranged corresponding to the filter element, and a slag discharging hole is formed in the bottom of the shell;
the top of the shell is provided with a differential pressure signal transmitter.
According to the utility model discloses a hydrothermal liquefaction product separator, high pressure filter is provided with a plurality ofly for it is a plurality of to switch high pressure filter arranges the sediment.
According to the utility model discloses a hydrothermal liquefaction result separator, hydrothermal liquefaction result separator still includes the gas bomb, the gas outlet of gas bomb with high pressure filter's result discharge port passes through the gas transmission pipeline intercommunication, be provided with gas transmission valve and booster compressor on the gas transmission pipeline.
According to the hydrothermal liquefied product separation device provided by the utility model, the outlet of the back pressure valve is communicated with the gas-liquid inlet of the gas-liquid separator through a gas-liquid pipeline, and a third temperature instrument is arranged on the gas-liquid pipeline; and/or the presence of a gas in the gas,
the hydrothermal liquefied product separation device further comprises a gas collecting bottle, and an inlet of the gas collecting bottle is communicated with a gas phase outlet of the gas-liquid separator.
According to the hydrothermal liquefaction product separation device of the utility model, the oil-water separator comprises an oil outlet cylinder extending along the horizontal direction;
an oil-water mixture channel is arranged in the oil outlet cylinder, the oil-water mixture channel extends along the horizontal direction, a super-hydrophobic super-oleophylic net film is arranged on the inner side wall of the oil-water mixture channel, and openings are formed in the top and the bottom of the oil-water mixture channel to communicate the oil-water mixture channel with the oil outlet cylinder;
the oil outlet cylinder is provided with a liquid phase inlet and a water phase outlet, the liquid phase inlet and the water phase outlet are respectively communicated with two ends of the oil-water mixture channel, and an oil phase outlet is arranged at one side, close to the water phase outlet, of the bottom of the oil outlet cylinder.
According to the hydrothermal liquefied product separation device provided by the embodiment of the utility model, the liquid phase outlet of the gas-liquid separator is communicated with the liquid phase inlet of the oil-water separator through the liquid discharge pipeline, and the liquid discharge pipeline is provided with the liquid discharge valve; and/or the presence of a gas in the gas,
the hydrothermal liquefaction product separation device further comprises an oil storage tank and a water storage tank, wherein an inlet of the oil storage tank and an inlet of the water storage tank are respectively communicated with an oil phase outlet and a water phase outlet of the oil-water separator.
The hydrothermal liquefied product separation device provided by the embodiment of the utility model comprises a cooler, a high-pressure filter, a back pressure valve, a gas-liquid separator and an oil-water separator, and the materials required by the preparation of each device are common and the cost is lower; the high-temperature high-pressure product generated by the hydrothermal liquefaction reaction is cooled by a cooler, then enters a high-pressure filter to remove solid residues, the residue-free product is depressurized by a back pressure valve and then passes through a gas-liquid separator and an oil-water separator to respectively obtain gas-phase, water-phase and oil-phase products, the hydrothermal liquefaction product separation device is good in continuity, thorough in product separation, simple in operation process, convenient to manufacture and install, low in cost and low in operation energy consumption, does not need chemical reagent input or centrifugal equipment, and can be widely applied to separation of biomass continuous hydrothermal liquefaction reaction products.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a hydrothermal liquefied product separation device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the construction of the high pressure filter of FIG. 1;
FIG. 3 is a graph of pressure changes of the hydrothermal liquefaction system before and after deslagging of the high pressure filter of FIG. 1;
FIG. 4 is a schematic diagram of the oil-water separator of FIG. 1.
Reference numerals:
100: a hydrothermal liquefaction product separation device; 1: a first pressure gauge; 2: a first temperature meter; 3: a first rupture disk; 4: a cooler; 5: a second temperature meter; 6: a second rupture disc; 7: a product collection tank; 8: a gas delivery valve; 9: a back pressure valve; 10: a third temperature meter; 11: a second pressure gauge; 12: a gas-liquid separator; 13: a gas collection bottle; 14: a drain valve; 15: an oil-water separator; 151: an oil outlet cylinder; 152: an oil-water mixture passage; 153: a liquid phase inlet; 154: a super-hydrophobic super-oleophilic net film; 155: an oil phase outlet; 156: a water phase outlet; 16: an oil storage tank; 17: a water storage tank; 18: a supercharger; 19: a gas cylinder; 20: a slag storage tank; 21: a slag discharge valve; 22: a high pressure filter; 221: a product feed port; 222: a differential pressure transmitter; 223: a product discharge port; 224: a cover body; 225: a housing; 226: a filter element; 227: a slag discharge port; 23: a water circulating pump; 24: and a cooling water tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment of the utility model provides a hydrothermal liquefaction product separator, as shown in figure 1, hydrothermal liquefaction product separator includes cooler 4, high pressure filter 22, back pressure valve 9, vapour and liquid separator 12 and oil water separator 15.
As shown in fig. 1, the inlet of the cooler 4 is used for communicating with the hydrothermal liquefaction reaction system, and the outlet of the cooler 4 is communicated with the product feed port 221 of the high-pressure filter 22. The cooler 4 cools the product through heat convection (as shown in fig. 1, the cooler 4 is in circulating communication with a circulating water pump 23 and a cooling water tank 24), the top of the cooler 4 is provided with an inlet and an outlet, the outlet of the cooler 4 is communicated with a high-pressure filter 22, as shown in fig. 1, in the embodiment, the hydrothermal liquefaction product separation device further comprises a product collection tank 7; the inlet of the cooler 4 is communicated with a product feeding pipeline, a first pressure instrument 1 and a first temperature instrument 2 are arranged on the part of the product feeding pipeline, which is far away from the inlet of the cooler 4, and the part of the product feeding pipeline, which is close to the inlet of the cooler 4, is communicated with a first feed inlet of a product collecting tank 7 through a first branch; the outlet of the cooler 4 is communicated with the product feeding hole 221 of the high-pressure filter 22 through a product discharging pipeline, a second temperature instrument 5 is arranged on the part of the product discharging pipeline close to the outlet of the cooler 4, and the part of the product discharging pipeline close to the product feeding hole 221 of the high-pressure filter 22 is communicated with the second feeding hole of the product collecting tank 7 through a second branch; the first branch and the second branch are respectively provided with a first rupture disk 3 and a second rupture disk 6.
As shown in fig. 1 and 2, the high pressure filter 22 is a sealed structure and can filter and remove solid residues in the product, the high pressure filter 22 mainly includes a housing (as shown in fig. 2, the housing includes a cover 224 and a casing 225, the cover 224 covers the casing 225) and a filter element 226, the filter element 226 is located in the housing, and the filter element 226 is connected to the inner side wall of the top of the housing; the top of the shell is provided with a product feeding hole 221 and a product discharging hole 223, the product discharging hole 223 is arranged corresponding to the filter element 226, and the bottom of the shell is provided with a slag discharging hole 227; a differential pressure transmitter 222 is provided on the top of the housing. The hydrothermal liquefaction product separation device also comprises a slag storage tank 20; the slag discharge port 227 of the high pressure filter 22 is communicated with the slag inlet of the slag storage tank 20 through a slag discharge pipeline, and the slag discharge pipeline is provided with a slag discharge valve 21. The differential pressure transmitter 222 can detect the internal and external differential pressures of the filter element 226, and preferably, the set transmission value of the differential pressure transmitter 222 is 0.35 MPa.
As shown in fig. 1, the inlet and outlet of the back pressure valve 9 communicate with the product discharge port 223 of the high pressure filter 22 and the gas-liquid inlet of the gas-liquid separator 12, respectively. The back pressure valve 9 is used for reducing the pressure of the product and is arranged on a pipeline between the high-pressure filter 22 and the gas-liquid separator 12, as shown in fig. 1, the outlet of the back pressure valve 9 is communicated with the gas-liquid inlet of the gas-liquid separator 12 through a gas-liquid pipeline, and the gas-liquid pipeline is provided with a third temperature instrument 10. The backpressure valve 9 is arranged on a pipeline between the high-pressure filter 22 and the gas-liquid separator 12, solid residues are removed from the product, and then the product passes through the backpressure valve 9, so that the wear or the blockage of the backpressure valve 9 can be effectively avoided. The number of the gas-liquid separators 12 may be 1, 2 or more, and preferably, the number of the gas-liquid separators 12 may be 1.
As shown in fig. 1, the liquid phase outlet of the gas-liquid separator 12 communicates with the liquid phase inlet 153 of the oil-water separator 15. The gas-liquid separator 12 separates gas-phase and liquid-phase products through gravity settling, the top of the gas-liquid separator 12 is provided with a gas-phase outlet, the gas-phase outlet of the gas-liquid separator 12 is communicated with the inlet of the gas collecting bottle 13, the bottom of the gas-liquid separator 12 is provided with a liquid-phase outlet, and the liquid-phase outlet of the gas-liquid separator 12 is communicated with the liquid-phase inlet 153 of the oil-water separator 15; the gas-phase product outlet of the gas-liquid separator 12 is provided with a second pressure gauge 11.
The oil-water separator 15 separates oil phase and water phase products by special surface wetting property, as shown in fig. 4, in this embodiment, the oil-water separator 15 uses a super-hydrophobic super-oleophilic mesh membrane 154 for oil-water separation, and the oil-water separator 15 includes an oil outlet cylinder 151 extending along the horizontal direction; an oil-water mixture channel 152 is arranged in the oil outlet cylinder 151, the oil-water mixture channel 152 extends along the horizontal direction, the super-hydrophobic super-oleophylic net film 154 is coiled into a tube shape and is attached to the inner side wall of the oil-water mixture channel 152, and the two ends of the super-hydrophobic super-oleophylic net film are fixed by U-shaped clamps; rectangular openings with 120-degree included angles are formed in the top and the bottom of the oil-water mixture channel 152 to communicate the oil-water mixture channel 152 with the oil outlet cylinder 151; the oil outlet cylinder 151 is provided with a liquid phase inlet 153 and a water phase outlet 156, the liquid phase inlet 153 and the water phase outlet 156 are respectively communicated with two ends of the oil-water mixture channel 152, and one side of the bottom of the oil outlet cylinder 151, which is close to the water phase outlet 156, is provided with an oil phase outlet 155. The water phase outlet 156 and the oil phase outlet 155 are respectively communicated with the water storage tank 17 and the oil storage tank 16. The liquid phase outlet of the gas-liquid separator 12 is communicated with the liquid phase inlet 153 of the oil-water separator 15 through a liquid discharge pipeline, and a liquid discharge valve 14 is arranged on the liquid discharge pipeline. The number of the oil-water separators 15 may be 1 to 7, and preferably, the number of the oil-water separators 15 is 4, and the oil-water separators 15 are connected in series. Openings are formed in the top and the bottom of the oil-water mixture channel 152, so that not only can floating oil phases be separated, but also small oil drops mixed in water phases can be separated; meanwhile, the oil-water separation effect can be further improved by connecting the plurality of oil-water separators 15 in series, and the oil-water separation effect can be improved by 5-15% compared with that of a single oil-water separator 15.
The hydrothermal liquefied product separation device provided by the embodiment of the utility model comprises a cooler 4, a high-pressure filter 22, a back pressure valve 9, a gas-liquid separator 12 and an oil-water separator 15, and materials required by each preparation device are common and have lower cost; the high-temperature high-pressure product generated by the hydrothermal liquefaction reaction is cooled by the cooler 4, then enters the high-pressure filter 22 to remove solid residues, the residue-free product is depressurized by the backpressure valve 9 and then passes through the gas-liquid separator 12 and the oil-water separator 15 to respectively obtain gas-phase, water-phase and oil-phase products, the hydrothermal liquefaction product separation device has the advantages of good continuity, thorough product separation, simple operation process, convenient manufacture and installation, no need of chemical reagent input or centrifugal equipment, low cost and low operation energy consumption, and can be widely applied to separation of biomass continuous hydrothermal liquefaction reaction products.
The high pressure filter 22 is connected to a pressurizing and air-feeding device, the pressurizing and air-feeding device is communicated with a product discharge port 223 of the high pressure filter 22, gas is fed into the high pressure filter 22 to increase the pressure in the high pressure filter 22 to be equal to the pressure of the hydrothermal liquefaction reaction, specifically, as shown in fig. 1, in the present embodiment, the hydrothermal liquefaction product separation device further includes a gas storage cylinder 19, an air outlet of the gas storage cylinder 19 is communicated with the product discharge port 223 of the high pressure filter 22 through a gas transmission pipeline, and a gas transmission valve 8 and a supercharger 18 are arranged on the gas transmission pipeline, that is, the pressurizing and air-feeding device includes the gas storage cylinder 19, the supercharger 18 and the gas transmission valve 8. Further, in order to prevent a chemical reaction between the gas supplied from the pressurizing and gas-supplying device and the product, an inert gas is supplied into the high-pressure filter 22, and preferably, nitrogen gas is supplied into the high-pressure filter 22.
The material of the main body of the high-pressure filter 22 is not particularly limited, and for example, the material of the main body of the high-pressure filter 22 may be stainless steel, carbon steel, or the like. The high-pressure filter 22 can remove solid residues in the product flowing process under the hydrothermal liquefaction reaction pressure, and the pressure of the product is not required to be reduced by the backpressure valve 9, so that the abrasion of the solid residues and the blockage of the backpressure valve 9 are avoided, and the continuity of the separation process is ensured; the high pressure filter 22 may be provided in plural, and is used for switching the plural high pressure filters 22 to discharge slag, for example, two high pressure filters 22 are provided and connected by a three-way valve, solid residue is discharged by switching between the two high pressure filters 22, and the high pressure filter 22 is re-pressurized to reaction pressure after the solid residue is discharged, so as to ensure pressure stability in the separation process; the pressure difference transmitter 222 is used to detect the pressure difference between the inside and outside of the filter element 226, and the solid residue discharge prompt is sent out before the pressure difference seriously affects the filtering performance of the filter element 226. The high pressure filter 22 switches the filtered product to discharge the solid residue; before and after slag discharge, the comparison between the pressure change curve inside the high-pressure filter 22 and the pressure change curve of the hydrothermal liquefaction system is shown in fig. 3, so that the pressure of the hydrothermal liquefaction product separation device is not influenced in the process of discharging the solid residues, and the stable operation of the hydrothermal liquefaction product separation device is ensured. The high-pressure filter 22 removes solid residues without extraction precipitation or centrifugal separation, so that required equipment is reduced, the operation cost and energy consumption are reduced, and the product after passing through the high-pressure filter 22 almost does not contain solid residues, so that the separation effect is good.
The main material of the oil-water separator 15 may be glass or a material such as acrylic plate, and is not particularly limited herein. The oil-water separator 15 is provided with a super-hydrophobic super-oleophylic net film 154, the substrate of the super-hydrophobic super-oleophylic net film 154 can be a stainless steel net or a metal net such as a copper net, the mesh number is 200-500 meshes, the preparation method can be chemical etching or electrostatic spinning, and the like, and the method can change the surface roughness of the material in a nanometer scale, and is not limited specifically herein. By utilizing the special surface wetting property, the super-hydrophobic super-oleophilic net film 154 is prepared and the oil-water separator 15 is designed, the oil phase can be gradually adsorbed to the surface of the super-hydrophobic super-oleophilic net film 154, because the contact angle between the oil phase and the super-hydrophobic super-oleophilic net film 154 is smaller, the oil phase can be gathered and coarsened on the surface of the super-hydrophobic super-oleophilic net film 154 and enters the oil outlet cylinder 151 through the super-hydrophobic super-oleophilic net film 154, and the contact angle between the water phase and the super-hydrophobic super-oleophilic net film 154 is too large and is intercepted, so that the oil-water separation is realized; the super-hydrophobic super-oleophylic net film 154 is simple to prepare, low in cost, high in separation efficiency, long in service life and resistant to pollution. The oil-water separation effect of the super-hydrophobic super-oleophylic net film 154 can reach 80-90%, chemical reagent investment is not needed, equipment such as solvent evaporation recovery and a centrifugal machine is not needed, the environment is friendly, and the operation cost and the energy consumption are low.
The embodiment of the utility model provides a hydrothermal liquefaction product separation method is still provided, and this hydrothermal liquefaction product separation method is realized based on hydrothermal liquefaction product separator as introduced above, and this hydrothermal liquefaction product separation method includes:
step S110, a super-hydrophobic super-oleophilic mesh film 154 is prepared.
Optionally, a 400-mesh stainless steel net is used as a substrate, and the super-hydrophobic super-oleophilic mesh film 154 is prepared by a chemical etching method.
In step S120, the pilot pressure of the back pressure valve 9 and the transmission value of the differential pressure transmitter 222 are set.
Specifically, a pilot pressure is preset for the back pressure valve 9 according to the pressure of the hydrothermal liquefaction reaction, and the range of the pilot pressure is 0-25 MPa; the differential pressure transmitter 222 is set to a transmission value in the range of 0 to 1MPa, and preferably, the differential pressure transmitter 222 is set to a differential pressure transmission value of 0.35 MPa.
Step S130, the hydrothermal liquefaction product with high temperature and high pressure flows into the cooler 4 to cool the hydrothermal liquefaction product to a preset temperature value.
Optionally, the preset temperature value is 70-100 ℃, so that the backpressure valve 9 cannot lose effectiveness due to high temperature, the biological crude oil in the hydrothermal liquefaction product is ensured to have low viscosity and cannot be adhered to a pipeline or equipment, and meanwhile, the temperature is ensured to be below the saturation temperature of water, so that the water phase is prevented from being gasified and mixed into the gas phase.
Step S140, the cooled hydrothermal liquefaction product flows into the high-pressure filter 22 to separate and obtain a solid residue and a liquid-gas mixed product.
Specifically, the product cooled in step S130 enters one of the high pressure filters 22, and the product flows into the high pressure filter 22 through the pipeline, the volume is suddenly increased, so that the flow rate of the product is greatly reduced, the residue is more easily trapped in the container and is precipitated at the bottom, the liquid phase and gas phase products pass through the filter element 226 and flow out from the product discharge port 223 at the top, and the solid residue is temporarily stored in the housing 225 of the high pressure filter 22.
The existence of solid residues in the high-pressure filter 22 can cause the pressure difference between the inside and the outside of the filter element 226, when the pressure difference reaches 0.35MPa, the pressure difference signal generator 222 can send a signal, at this time, a product is switched to another idle high-pressure filter 22 for filtering, then, a slag discharge valve 227 at the bottom of the high-pressure filter 22 is opened, and the solid residues are discharged into the slag storage tank 20; and after the residue is emptied, the deslagging valve 227 is closed, the gas transmission valve 8 at the top is opened, the pressure of the high-pressure filter 22 is increased to the hydrothermal liquefaction reaction pressure, and then the gas transmission valve 8 is closed to wait for the next filtration.
Step S150, the liquid-gas mixed product is depressurized by the backpressure valve 9 and flows into the gas-liquid separator 12 to be separated to obtain a gas-phase product and a liquid-phase product.
Specifically, the slag-free product obtained in step S140 is reduced in pressure by the back pressure valve 9; the backpressure valve 9 automatically controls the flow of products in the pipeline according to the set pilot pressure, and the system pressure is maintained in a stable state; when the pressure of the product in the pipeline is greater than the pilot pressure, the valve is automatically opened to release the product; when the pressure of the product in the pipeline is less than the pilot pressure, the valve automatically closes to trap the product.
The product depressurized by the back pressure valve 9 enters a gas-liquid separator 12, the flow rate is reduced due to sudden expansion of the space, then due to the action of gravity, the liquid phase flows downwards and the gas phase floats upwards to generate separation, the separated gas-phase product enters a gas collecting bottle 13, and the liquid-phase product flows out from a liquid-phase outlet at the bottom of the gas-liquid separator 12.
In step S160, the liquid phase product flows into the oil-water separator 15 to separate the water phase product and the oil phase product.
Specifically, the liquid phase product enters the oil-water separator 15, and when flowing in the oil-water mixture channel 152, the oil phase will gradually adsorb onto the surface of the super-hydrophobic super-oleophilic net film 154, because the contact angle between the oil phase and the super-hydrophobic super-oleophilic net film 154 is small, the oil phase can gather and coarsen on the net film surface, and enter the oil outlet cylinder 151 through the net film, and flow into the oil storage tank 16 through the oil phase outlet 155; the contact angle of the aqueous phase with the omentum is too large and is trapped in the channel and continues to flow forward from the aqueous phase outlet 156 into the water storage tank 17.
Example 1:
adopt the utility model discloses a hydrothermal liquefaction resultant separator separates pig manure hydrothermal liquefaction resultant. Wherein the water content of the pig manure is 82%, the hydrothermal liquefaction reaction temperature is 305 ℃, the system pressure is 10.3MPa, the reaction time is 30min, the continuous operation state of the system is stable, the pressure is not obviously fluctuated, the highest yield of the biological crude oil is 34.4%, the lowest oxygen content is 11.2%, and the highest heat value is 38.5 MJ/kg.
Example 2:
adopt the hydrothermal liquefaction result separator of the utility model to separate microalgae hydrothermal liquefaction products. Wherein the water content of the microalgae is 82%, the hydrothermal liquefaction reaction temperature is 320 ℃, the system pressure is 20.0MPa, the reaction time is 15min, the continuous operation state of the system is stable, the pressure is not obviously fluctuated, the highest yield of the biological crude oil is 39.0%, the lowest oxygen content is 9.9%, and the highest heat value is 39.3 MJ/kg.
Example 3:
adopt the utility model discloses a hydrothermal liquefaction resultant separator separates kitchen garbage hydrothermal liquefaction resultant. Wherein the water content of the kitchen waste is 78%, the hydrothermal liquefaction reaction temperature is 300 ℃, the system pressure is 12.8MPa, the reaction time is 30min, the continuous operation state of the system is stable, the pressure is not obviously fluctuated, the highest yield of the biological crude oil is 42.0%, the lowest oxygen content is 6.5%, and the highest heat value is 37.2 MJ/kg.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (9)
1. A hydrothermal liquefaction product separation device is characterized by comprising a cooler, a high-pressure filter, a back pressure valve, a gas-liquid separator and an oil-water separator;
the inlet of the cooler is communicated with the hydrothermal liquefaction reaction system, and the outlet of the cooler is communicated with the product feed inlet of the high-pressure filter;
the inlet and the outlet of the back pressure valve are respectively communicated with the product discharge port of the high-pressure filter and the gas-liquid inlet of the gas-liquid separator;
and a liquid phase outlet of the gas-liquid separator is communicated with a liquid phase inlet of the oil-water separator.
2. The hydrothermal liquefaction product separation device of claim 1, further comprising a product collection tank;
the inlet of the cooler is communicated with a product feeding pipeline, a first pressure instrument and a first temperature instrument are arranged on the part, far away from the inlet of the cooler, of the product feeding pipeline, and the part, close to the inlet of the cooler, of the product feeding pipeline is communicated with a first feeding hole of the product collecting tank through a first branch;
the outlet of the cooler is communicated with the product feeding hole of the high-pressure filter through a product discharging pipeline, a second temperature instrument is arranged on the part, close to the outlet of the cooler, of the product discharging pipeline, and the part, close to the product feeding hole of the high-pressure filter, of the product discharging pipeline is communicated with the second feeding hole of the product collecting tank through a second branch;
and the first branch and the second branch are respectively provided with a first rupture disk and a second rupture disk.
3. The hydrothermal liquefaction product separation device of claim 1, wherein the hydrothermal liquefaction product separation device further comprises a slag storage tank;
the slag discharging port of the high-pressure filter is communicated with the slag inlet of the slag storage box through a slag discharging pipeline, and the slag discharging pipeline is provided with a slag discharging valve.
4. The hydrothermal liquefaction product separation device of claim 1, wherein the high pressure filter includes a housing and a filter element, the filter element being located within the housing, the filter element being connected to an interior sidewall of a top of the housing;
a product feeding hole and a product discharging hole are formed in the top of the shell, the product discharging hole is arranged corresponding to the filter element, and a slag discharging hole is formed in the bottom of the shell;
the top of the shell is provided with a differential pressure signal transmitter.
5. The hydrothermal liquefied product separation device according to claim 1, wherein the high-pressure filter is provided in plurality for switching the plurality of high-pressure filters to discharge the slag.
6. The hydrothermal liquefied product separation device according to claim 1, further comprising a gas bomb, wherein a gas outlet of the gas bomb is communicated with a product discharge port of the high pressure filter through a gas transmission pipeline, and a gas transmission valve and a supercharger are arranged on the gas transmission pipeline.
7. The hydrothermal liquefied product separation device according to any one of claims 1 to 6, wherein an outlet of the back pressure valve is communicated with a gas-liquid inlet of the gas-liquid separator through a gas-liquid pipeline, and a third temperature instrument is arranged on the gas-liquid pipeline; and/or the presence of a gas in the gas,
the hydrothermal liquefied product separation device further comprises a gas collecting bottle, and an inlet of the gas collecting bottle is communicated with a gas phase outlet of the gas-liquid separator.
8. The hydrothermal liquefied product separation device according to any one of claims 1 to 6, wherein the oil-water separator includes an oil outlet cylinder extending in a horizontal direction;
an oil-water mixture channel is arranged in the oil outlet cylinder, the oil-water mixture channel extends along the horizontal direction, a super-hydrophobic super-oleophylic net film is arranged on the inner side wall of the oil-water mixture channel, and openings are formed in the top and the bottom of the oil-water mixture channel to communicate the oil-water mixture channel with the oil outlet cylinder;
the oil outlet cylinder is provided with a liquid phase inlet and a water phase outlet, the liquid phase inlet and the water phase outlet are respectively communicated with two ends of the oil-water mixture channel, and an oil phase outlet is arranged at one side, close to the water phase outlet, of the bottom of the oil outlet cylinder.
9. The hydrothermal liquefied product separation device according to any one of claims 1 to 6, wherein a liquid phase outlet of the gas-liquid separator is communicated with a liquid phase inlet of the oil-water separator through a drain pipeline, and a drain valve is arranged on the drain pipeline; and/or the presence of a gas in the gas,
the hydrothermal liquefaction product separation device further comprises an oil storage tank and a water storage tank, wherein an inlet of the oil storage tank and an inlet of the water storage tank are respectively communicated with an oil phase outlet and a water phase outlet of the oil-water separator.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114225448A (en) * | 2021-12-20 | 2022-03-25 | 西安石油大学 | Tower top system dew point corrosion prevention and control method |
| CN114470953A (en) * | 2020-11-12 | 2022-05-13 | 中国农业大学 | Hydrothermal liquefaction product separation device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114470953A (en) * | 2020-11-12 | 2022-05-13 | 中国农业大学 | Hydrothermal liquefaction product separation device and method |
| CN114225448A (en) * | 2021-12-20 | 2022-03-25 | 西安石油大学 | Tower top system dew point corrosion prevention and control method |
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