CN117186914A - Production method of biomass oil coke slurry - Google Patents

Abstract

The invention discloses a production method of biomass oil coke slurry, which comprises the steps of carrying out high-temperature pyrolysis treatment on biomass raw materials; and then mixing the biomass oil of the pyrolysis product with the biomass coke powder. The biomass oil coke slurry generated by the method is sent into a gasification furnace to be used for producing synthesis gas after the pressure of the biomass oil coke slurry is increased by a slurry pump. The biomass fuel gas and part of biomass oil of the pyrolysis product are directly combusted in the pyrolysis process of the high temperature to provide heat required by pyrolysis, so that the problems of high dust content, more impurities and complex recycling process of the biomass oil product existing in the existing biomass pyrolysis process product are overcome; the biomass Jiao Hanhui has the technical problems of high proportion, low volatile matter, certain tar content, difficult transportation, lack of high-value application scenes and the like, and the prepared bio-oil coke slurry is stable, meets the feeding requirement of the gasification furnace, and provides a new feasible route for high-value utilization of the biomass.

Description

Production method of biomass oil coke slurry

Technical Field

The invention relates to a production method of oil coke slurry, in particular to a production method of biomass oil coke slurry.

Background

Biomass represented by agricultural and forestry wastes such as various straws, wood chip, fallen leaves, fruit tree branches and the like and household garbage is an internationally accepted renewable energy source, has the characteristics of green fuel and green raw materials, and is a key for realizing carbon peak and carbon neutralization in the future. The biomass raw material has the characteristics of high volatile matter, low carbon fixation, low heat value, low ash content and the like, and is more suitable for a step-by-step gasification process of pyrolysis and gasification.

Biomass pyrolysis is a high-efficiency and low-cost biomass pyrolysis technology, can produce three substances of biomass gas, biomass oil and biomass coke, wherein the biomass gas and part of biomass oil can be burnt in a pyrolysis system to provide pyrolysis heat, and pyrolysis solid product biomass coke can be converted into synthesis gas through a gasification furnace to be used as a raw material of a synthetic chemical product, can also be used as a reducing agent of the iron and steel industry to replace coke made of coal and can also be directly sold as fuel, but the two substances are not really used for converting the biomass coke into raw materials, and finally are converted into CO2 to be discharged into the atmosphere through oxidation or combustion processes.

The research on oil coke slurry at present mainly focuses on the production of oil coke slurry, and the research on oil coke slurry prepared by biomass is less, for example, the invention patent application with the application number of 2006101493-137.9 discloses an oil coke slurry, a preparation method and application, the oil coke slurry contains oil coke, heavy oil and additives, the heat value, viscosity, cleanliness and combustion performance of the oil coke slurry are similar to those of the heavy oil, but the manufacturing cost of specific gravity oil is much lower, the oil coke slurry can replace the heavy oil, can be directly used for a kiln in the fuel oil industry (civil), and does not need to modify the flow of an application kiln and matched equipment; the invention patent with the application number of 200910237994.8 discloses petroleum coke slurry for an internal combustion engine and a preparation method thereof, wherein mechanical crushing is adopted to crush petroleum coke for the first time to obtain petroleum coke particles with the granularity of 10-100 mu m; secondly, carrying out secondary crushing on the petroleum coke particles subjected to primary crushing by adopting an air flow crusher to obtain ultrafine petroleum coke particles with the particle size of 0.5-5 mu m; and uniformly stirring the obtained superfine petroleum coke particles, diesel oil, a viscosity reducer, a stabilizer and a power recovery additive to obtain the petroleum coke slurry for the internal combustion engine. The petroleum coke slurry prepared by the method has good liquid fluidity and stability, no sediment after standing for 7 days, a small amount of soft agglomerated particles after standing for 30 days, and recovery after scattering. The petroleum coke slurry for the internal combustion engine has the output power of 5.86 KW-6.1 KW measured under the condition that the rotating speed of the diesel engine is 2600 r/min; the invention patent with the application number of 201010140813.2 discloses an integrated preparation method of petroleum coke slurry for an internal combustion engine, wherein the method adopts mechanical crushing to crush petroleum coke to obtain petroleum coke particles with the granularity of 10-100 mu m; and then mixing the mechanically crushed petroleum coke particles with diesel oil, a viscosity reducer, a stabilizer and a power recovery additive, and grinding and pulping in a stirring mill to obtain the petroleum coke slurry for the internal combustion engine. The prepared petroleum coke slurry has good liquid fluidity and stability, no sediment after standing for 7 days, a small amount of soft agglomerated particles after standing for 30 days, and recovery after scattering; the invention patent with the application number of 201110295928.3 discloses a high ash fusion point petroleum coke slurry for gasification and a preparation method thereof, wherein the petroleum coke slurry comprises the following components in percentage by weight: 60-70% of petroleum coke, 15-39% of water, 0.5-10% of fluxing agent and 0.5-5% of additive, and the petroleum coke raw materials are crushed, screened and sent into a rod mill together with the rest raw materials to be ground, thus obtaining the product. Compared with the prior art, the invention has higher petroleum coke concentration and lower ash fusion point, and meets the requirements of gasification slurry; another patent application No. 200610058278.X discloses a new fuel oil coke slurry, its preparation method and application. The fuel oil coke slurry consists of the following components in parts by weight: 3-7 parts of petroleum coke, 3-7 parts of liquid medium and 0.3-1 part of additive. The ash produced after the fuel oil coke slurry is combusted can be controlled below 1%, and the fuel oil coke slurry can replace the existing oil (gas) fuel and can be widely applied to various occasions requiring ultralow ash content. In addition, the invention has the advantages of simple process operation, easy implementation and the like.

The research on recycling of biomass coke, which is a biomass pyrolysis product, is less, and the existing research is mainly to prepare water coke slurry, for example, an invention patent CN101161793B discloses a biomass slurry, which is prepared by mixing waste residues, tar and wastewater generated during biomass energy conversion of crop straws, forestry wastes and the like with an emulsifying dispersant and then wet grinding, wherein the weight percentages of the components are as follows: 50 to 65 percent of carbon powder or/and ash, 5 to 20 percent of tar, 20 to 40 percent of water and 0.5 to 5.0 percent of emulsifying dispersant. The biomass slurry has the solid content of 63-68%, fine particle size, good fluidity, static water separation rate of less than 0.5% in 24 hours, and no obvious layering after standing for seven days. The slurry can be used for gasifiers and boilers instead of coal water slurry.

Disclosure of Invention

The invention aims at solving the problems that the existing biomass pyrolysis process has large dust content and more impurities in the biomass oil product, and the recycling process is complex; the biomass Jiao Hanhui has the technical problems of high proportion, low volatile matter content, certain tar content, difficult transportation, lack of high-value application scenes and the like, the biomass oil coke slurry production method is provided, the bio-oil and the bio-coke produced by the biomass pyrolysis are prepared into stable bio-oil coke slurry, the requirement of feeding of a gasification furnace is met (the gasification furnace for feeding slurry generally requires the slurry to be stable and uniform without layering, and meanwhile, the higher the heat value of the slurry is, the better the heat value of the slurry is, the higher the heat value of the slurry is, the more than 15 MJ/kg), and a new feasible route is provided for high-value utilization of biomass.

In order to achieve the above object, in one aspect, the present invention provides a method for producing a biomass oil slurry, comprising subjecting a biomass raw material to a high-temperature pyrolysis treatment; and then mixing the biomass oil of the pyrolysis product with biomass coke powder to obtain the biomass oil.

Wherein, the biomass raw material is agriculture and forestry waste or/and household garbage.

In particular, the agricultural and forestry waste is selected from various crop straws, wood chips, fallen leaves and fruit tree branches; the household garbage is selected from solid dry garbage wastes with high water content such as meal residues, grease and the like.

In particular, the biomass feedstock is an internationally recognized biomass material that can be used as a renewable energy source.

In particular, the water content of the biomass feedstock is less than 15%.

In particular, the temperature of the high-temperature pyrolysis treatment is 500-600 ℃; the pyrolysis treatment time is 10-30min.

In particular, the weight part ratio of the pyrolysis product biomass oil to the biomass coke powder is (60-80): (20-40), preferably 60:40.

In particular, it also comprises adding an additive to the pyrolysis product biomass oil and the biomass coke powder, and the ratio of the mass of the additive to the total mass of the pyrolysis product biomass oil and the biomass coke powder is (0.1-0.3): 100 Preferably 0.1): 100.

the additive is mainly used for reducing the internal stress of the biomass oil coke slurry, keeping the stability of the biomass oil coke slurry and ensuring the stability of downstream conveying and gasification reaction processes.

In particular, the additive is sodium dodecyl benzene sulfonate or OP emulsifier, preferably OP emulsifier, and more preferably OP-10 emulsifier.

The invention also provides a method for generating biomass oil coke slurry, which comprises the following steps in sequence:

1) Crushing the collected biomass raw material into a crushed material with the particle size smaller than 10 mm; drying the crushed materials to prepare pretreated biomass raw materials for later use;

2) Placing the pretreated biomass raw material into a pyrolysis furnace, and performing high-temperature pyrolysis treatment to obtain pyrolysis products biomass gas, biomass oil and biomass coke; wherein the biomass fuel gas and part of biomass oil which are pyrolysis products are combusted in the pyrolysis furnace to provide heat for high-temperature pyrolysis; injecting the residual biomass oil into a container with a stirrer for standby;

3) Grinding biomass coke of a pyrolysis product to obtain biomass coke powder with the particle size smaller than 90 mu m;

4) And (3) sending the collected biomass coke powder, the biomass oil which is the pyrolysis product and the additive into a container with a stirrer, and stirring and uniformly mixing to obtain the biomass oil coke slurry.

In particular, the drying treatment temperature in step 1) is 100-200 ℃.

In particular, the moisture content of the pretreated biomass feedstock after the drying treatment is less than 15%.

In particular, the high-temperature pyrolysis treatment temperature in the step 2) is 500-600 ℃; the pyrolysis time is 10-30min, preferably 30min.

In particular, the high temperature pyrolysis treatment is an oxygen barrier pyrolysis treatment performed under a micropressure condition.

In particular, the micropressure condition is that the relative pressure in the pyrolysis furnace is 0.5-1kPa.

In the pyrolysis process, the relative pressure in the pyrolysis furnace is controlled to be 0.5-1kPa, so that the pyrolysis furnace is in a micro-positive pressure state, and the pyrolysis treatment is ensured to be oxygen-isolation high-temperature treatment.

All biomass gas and part of biomass oil generated by pyrolysis are directly combusted in a pyrolysis furnace (in the high-temperature pyrolysis process) to provide heat required by pyrolysis.

And the micro-pressure condition is adopted to isolate oxygen or air in the pyrolysis furnace.

Particularly, the grinding treatment is carried out by adopting a grinding machine, then the coke powder ground by the grinding machine is sent into a dust collector for wind-powder separation (namely, gas-solid separation, realizing collection of solid particle coke powder) under the action of external carrier gas air or nitrogen, and the biomass coke powder is obtained by using the dust collector (adopting a high-temperature resistant cloth bag filter).

In particular, the particle size of the biomass coke powder is preferably 10-90 μm.

The mill adopts a negative pressure type medium speed mill or ball mill. The inlet wind of the mill is preferably nitrogen. (the nitrogen gas is selected mainly because it is an inert gas, and other inert gases such as carbon dioxide may be selected so as not to cause coke powder fire or explosion due to the mixing of oxygen).

And separating the ground coke powder, and collecting the coke powder with the granularity smaller than 90 mu m.

In particular, the mass ratio of the biomass oil to the biomass coke powder in the step 4) is (60-80): (20-40), preferably 60:40.

In particular, the additive is sodium dodecylbenzenesulfonate or an OP emulsifier, preferably an OP emulsifier.

In particular, the OP emulsifier is OP-4, OP-7 or OP-10, and further preferably OP-10.

In particular, the ratio of the mass of the additive to the total mass of pyrolysis product biomass oil and biomass coke powder is (0.1-0.3): 100 Preferably 0.3): 100.

in particular, the stirring speed of the stirring is 40-60rpm; the stirring time is 3-5min.

In particular, the container with the stirrer in the step 4) is a normal pressure closed container, and a VOCS gas collection facility and a fire alarm instrument are arranged above the container.

The mixing proportion of the biological oil in the container with the stirrer is more than or equal to 60 percent, and the mixing proportion of the biological coke is less than or equal to 40 percent. (the ratio is weight ratio).

In particular, the ratio of the mass of the biomass oil to the total mass of the biomass oil and the biomass coke powder is more than or equal to 60 percent; the ratio of the mass of the biomass coke powder to the total mass of the biomass oil and the biomass coke powder is less than or equal to 40 percent.

In particular, a slurry stirrer is used for stirring and mixing the biomass oil and the biomass coke powder.

A biomass high-temperature pyrolysis system, a mill, a dust collector, a slurry stirrer, a slurry pump, a fan and other systems or devices; the biomass raw material sent from the outside is decomposed into three products of biomass fuel gas, biomass oil and biomass coke through the biomass pyrolysis system; the biomass is recycled by biomass gas and part of biomass oil which are products of high-temperature pyrolysis, and is used for direct combustion in a biomass pyrolysis system to provide heat required by pyrolysis, biomass coke enters a mill to be ground, and most of biomass oil enters a slurry stirrer; after the biomass coke is ground into qualified coke powder in a mill, air or nitrogen input from the outside is used as carrier gas to be sent into a dust collector for wind-powder separation and coke powder collection, the collected coke powder enters a slurry stirrer and biomass oil to be stirred into uniform slurry under the action of a small amount of externally added additives, and the uniform slurry enters a slurry pump to raise the pressure and then the qualified biomass oil coke slurry is sent out for being mainly used by a gasification furnace to produce synthesis gas.

And a fan is arranged behind the dust collector and provides power for conveying wind and powder, and the fan is used for pumping ventilation air from the dust collector to directly empty.

Preferably, in the biomass high-temperature pyrolysis system, firstly, an oxygen-isolation pyrolysis reaction is carried out in the system, and biomass fuel gas and part of biomass oil generated after pyrolysis are combusted to provide heat required by pyrolysis, and biomass coke and residual biomass oil generated after pyrolysis are used as pulping raw materials to be sent to downstream equipment;

the temperature and time of the pyrolysis treatment of the biomass can be adjusted within a certain range, and a self-heating mode is adopted.

Preferably, the fan adopts a centrifugal fan;

preferably, the slurry pump adopts a centrifugal pump or a screw pump with super-strong wear-resistant design.

The biomass with low heat value is pyrolyzed at high temperature to generate the bio-oil with high heat value and the bio-coke, and then the stable and uniform production of the biomass oil-coke slurry is realized through the mixing pulping process, so that the gasification furnace is convenient to use.

Compared with the prior art, the invention has the following advantages:

1. according to the method, liquid phase and solid phase products of high-temperature pyrolysis of biomass raw materials are used as slurry raw materials for preparing high-heat value materials, so that chemical products can be conveniently prepared through gasification furnace reaction, and most organic matters contained in the biomass raw materials can be used as raw materials; the method can realize the raw material application of more than 60% of organic matters in the biomass raw material; the availability of biomass raw materials is improved;

2. the slurry raw material prepared by the method can be conveniently pressurized by a slurry pump, is easily matched with a high-pressure and large-sized gasification furnace, and has obvious energy-saving and investment-saving effects compared with the gasification furnace with normal-pressure feeding;

the existing biomass gasification furnace is generally normal pressure or lower pressure (less than or equal to 2 MPa), the gasification furnace, particularly the slurry feeding water-coal slurry gasification furnace, can easily realize high pressure (4-9 MPa), and the compression work of the downstream synthesis gas can be greatly reduced by the pressure elevation of the gasification furnace.

The biomass oil coke slurry can be easily pressurized to 4.0 MPa-9.0 MPa by the slurry pump, and the raw material gas pressure required by the methanol synthesis process is generally above 7.5MPa by taking the methanol as an example, if the biomass oil coke slurry is pressurized to above 8.5MPa by the slurry pump and is fed into the gasification furnace, the methanol synthesis process can be carried out without a gas compressor, so that the energy consumption and the investment are greatly reduced.

3. In the method, biomass oil generated by pyrolysis is used as an intermediate product and used as a raw material for subsequent gasification treatment, the complex components of the biomass oil are all decomposed in the gasification process, the gasification treatment is converted into small-molecule effective gas components such as CO, H2 and the like, and impurities contained in the biomass oil are decomposed into effective gases or are easy to clean. Compared with the traditional pyrolysis method which uses biomass oil as a product, the biomass oil is a complex multi-component mixture, and impurities in the biomass oil are difficult to separate, so that the method provided by the invention solves the defect that high-value products are difficult to separate at low cost due to the fact that the biomass oil contains more impurities in the conventional pyrolysis product separation process.

According to the invention, most of liquid products and solid products in biomass pyrolysis products are mixed to prepare slurry, most of organic matters contained in biomass are reserved as raw materials, the raw materials are converted into effective gas components of small molecules through a downstream gasifier, and chemical products (such as methanol) are synthesized through the effective gas of the small molecules.

The method for preparing the oil coke slurry by mixing the biomass oil and the biomass coke which are biomass raw material pyrolysis products, and then removing the oil coke slurry into the gasifier solves the problems that the biomass oil contains more impurities and is difficult to separate high-value products with low cost in the conventional pyrolysis product separation process; solves the problem that biomass pyrolysis products are difficult to realize high-value and raw material utilization; solves the problems of more phases and complex separation process of biomass pyrolysis products.

The biomass pyrolysis and gasification processes generally have three phases of solid, liquid and gas, and are mutually mixed, when the temperature is reduced, oil droplets can be condensed in the gas phase, liquid phase substances can be separated out from solid coke, downstream equipment and pipelines can be blocked due to the characteristics, the product separation process is complex, and the product purity is low; the invention can well solve the problems by preparing the biomass oil coke slurry and combining the gas preparation process of the downstream gasification furnace.

4. The heat value of the oil coke slurry prepared by the method is generally more than 23MJ/kg, and compared with the traditional coal water slurry and water coke slurry, the heat value is improved more, and the gasification efficiency can be greatly improved.

5. The method solves the technical problems of complex biomass oil components and high separation difficulty in the existing biomass pyrolysis products, and the biomass oil and biomass coke are directly sent to a gasification furnace to be converted into synthesis gas (CO and H2) after being mixed and pulped, so that raw gas suitable for producing various chemicals is generated, and the separation and purification process of the biomass oil is avoided.

Drawings

Fig. 1 is a schematic diagram of a biomass oil coke slurry production process according to the invention.

Detailed Description

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the production method of the biomass oil coke slurry comprises a biomass high-temperature pyrolysis system (pyrolysis furnace) 1, a mill 2, a dust collector 3, a slurry stirrer 4, a slurry pump 5, a fan 6 and other systems or devices; the biomass raw material sent from the outside is decomposed into three products of biomass fuel gas, biomass oil and biomass coke through a biomass high-temperature pyrolysis system 1; the biomass fuel gas and part of biomass oil are directly combusted in a biomass pyrolysis system 1 to provide heat required by pyrolysis, biomass coke enters a mill 2 to be ground, and most of the biomass oil enters a slurry stirrer 4; after the biomass coke is ground into qualified coke powder in the mill 2, air or nitrogen gas input from the outside is used as carrier gas to be sent into the dust collector 3 for wind-powder separation and coke powder collection, the collected coke powder enters the slurry stirrer 4 and the biomass oil are stirred into uniform slurry under the action of a small amount of externally added additives, and the uniform slurry enters the slurry pump 5 to lift the pressure, so that qualified biomass oil coke slurry is sent out and is mainly used for a gasification furnace to produce synthesis gas. A fan 6 is arranged behind the dust collector 3 to provide power for conveying wind and powder, and the fan 6 is used for pumping ventilation air from the dust collector 3 to directly empty.

Example 1

1. Pretreatment of biomass feedstock

Crushing the collected biomass raw material by a crusher to obtain crushed materials with the particle size smaller than 10 mm; then sending the crushed materials into a dryer for drying treatment to obtain pretreated biomass raw materials with the water content of 12% (usually lower than 15%) for later use;

biomass feedstocks include, but are not limited to: agricultural and forestry waste such as various crop straws, wood chips, fallen leaves, fruit tree branches and the like; household garbage (generally solid dry garbage in other garbage classifications, waste with high water content such as meal residue, grease and the like is not contained); biomass that is internationally recognized in the art as useful as a renewable energy source is suitable for use in the present invention.

2. High temperature pyrolysis treatment

The pretreated biomass raw material is sent into a pyrolysis furnace, heated and warmed, and subjected to high-temperature pyrolysis treatment under the condition of isolating oxygen, and biomass raw material is pyrolyzed to generate biomass fuel gas, biomass oil and biomass coke;

wherein the temperature of the pyrolysis treatment is 500 ℃ (usually 500-600 ℃); pyrolysis time is 30min (typically 10-30 min); maintaining the pressure in the high-temperature pyrolysis furnace at micro positive pressure, wherein the relative pressure in the pyrolysis furnace is 0.7kPa (usually 0.5-1) kPa; micro-positive pressure is generated in the pyrolysis furnace, so that oxygen is isolated in the pyrolysis process of biomass raw materials.

The generated biomass fuel gas and a small amount of biomass oil are directly combusted in the biomass pyrolysis system (high-temperature pyrolysis furnace) to provide heat required by pyrolysis;

the actual process is that after the biomass fuel gas and a small amount of biomass oil are combusted in an external combustion chamber matched with the pyrolysis furnace, the generated flue gas returns to the pyrolysis furnace, and heat is provided through indirect heat exchange.

Injecting biomass oil into the slurry stirrer for standby;

the high-temperature pyrolysis temperature of the biomass raw material is selected to be 500-600 ℃, so that the proportion of liquid phase and solid phase products in the pyrolysis products exceeds 60% (by weight), the phenomenon that excessive gas phase products are difficult to utilize when the pyrolysis temperature is higher is avoided, the proportion of certain liquid phase products (exceeds 30% by weight) is also ensured, the phenomenon that the proportion of solid phase products is larger when the pyrolysis temperature is lower, and the pulping is influenced is avoided.

The pyrolysis temperature mainly influences the proportion of biomass fuel gas, biomass tar and biomass coke in a biomass pyrolysis product, the lower the temperature is, the higher the coke proportion is, the higher the temperature is, and the proportion of the biomass fuel gas is higher, so that the temperature is kept in the range of 500-600 ℃, the range of reasonable oil, carbon and gas proportions in the pyrolysis product is achieved, the proportion of liquid phase and solid phase in the biomass raw material pyrolysis product is ensured to be more than 60%, and the biomass is utilized to the greatest extent.

In the method, biomass raw materials are subjected to pyrolysis at 500-600 ℃, organic components of biomass are collected as much as possible in the form of biomass oil and biomass coke (more than 60% of organic matters in the biomass are used as raw materials), the organic components in the biomass raw materials are fully utilized and used as gasification raw materials, and biomass fuel gas is mainly used for self-heating of a pyrolysis furnace, so that the proportion of oil and carbon needs to be ensured as much as possible, and meanwhile, the biomass raw materials are matched with the pyrolysis temperature, so that the excessive operation temperature is avoided, the heat loss is larger, and the overall efficiency is reduced.

3. Grinding treatment

Feeding the biomass coke of the pyrolysis product into a mill for grinding treatment to prepare biomass coke powder, wherein the grinding treatment is carried out until the particle size of the biomass coke powder is smaller than 90 mu m (usually 10-90 mu m);

delivering the ground coke powder into a dust collector under the action of external carrier gas (air or nitrogen) for wind-powder separation, and collecting the coke powder (the particle size of the coke powder is smaller than 90 mu m, usually 10-90 mu m) by using the dust collector (adopting a high-temperature-resistant cloth bag filter);

4. preparing oil coke slurry

The collected biomass coke powder, the biomass oil which is a pyrolysis product and an additive OP-10 emulsifier are fed into a slurry stirrer together and stirred uniformly to prepare biomass oil coke slurry, wherein the mass ratio of the biomass oil to the biomass coke powder is 60:40 (usually (60-80): 20-40); the stirring rate was 50rpm (usually 40-60 rpm), and the stirring time was 4min (usually 3-5 min)

Adding an additive into the slurry stirrer, and uniformly mixing the additive and the pre-biomass oil coke slurry to prepare the biomass oil coke slurry, wherein the ratio of the mass of the additive to the total mass of the biomass oil and the biomass coke powder is 0.1:100 (typically (0.1-0.3): 100);

the additive in the invention is sodium dodecyl benzene sulfonate or OP emulsifier, preferably OP emulsifier, and more preferably OP-10 emulsifier.

The additive is mainly used for reducing the internal stress of the biomass oil coke slurry, maintaining the stability of the biomass oil coke slurry and ensuring the stable downstream conveying and gasification reaction process.

The biomass oil coke slurry prepared by the invention adopts a standing method to observe the layering property of the slurry, and the biomass oil coke slurry is not layered after standing for 2 hours at room temperature, so that biomass coke powder particles are not separated out.

For the application of the gasification furnace, the continuous production is realized, and the slurry is kept stand for 1 hour without layering and precipitation of particles, so that the invention completely meets the slurry layering property required by the gasification furnace.

The calorific value of the biomass oil coke slurry is measured by an oxygen bomb calorimeter, the measurement result is 24.2MJ/kg, the calorific value is obviously higher than the feeding calorific value requirement (generally more than 15 MJ/kg) of the slurry feeding gasifier, and the efficiency of the gasifier is greatly improved.

Example 2

1. Pretreatment of biomass feedstock

The same as in example 1.

2. High temperature pyrolysis treatment

Except that the high temperature pyrolysis treatment temperature is 600 ℃; the pyrolysis time was 10 minutes, and the other steps were the same as in example 1.

3. Grinding treatment

The procedure of example 1 was repeated except that the particle size of the pulverized biomass coke powder was smaller than 50. Mu.m.

4. Preparing oil coke slurry

Except that the mass ratio of biomass oil to biomass coke powder is 80:20 (generally (60-80): 20-40); an additive OP-2 emulsifier; the ratio of the mass of the additive to the total mass of the biomass oil and the biomass coke powder is 0.3:100 The procedure of example 1 was repeated except that the ratio was changed to 100 (usually 0.1 to 0.3).

The biomass oil coke slurry prepared by the invention adopts a standing method to observe the layering property of the slurry, and the biomass oil coke slurry is not layered after standing for 2 hours at room temperature, so that biomass coke powder particles are not separated out.

For the application of the gasification furnace, the continuous production is realized, and the slurry is kept stand for 1 hour without layering and precipitation of particles, so that the invention completely meets the slurry layering property required by the gasification furnace.

The calorific value of the biomass oil coke slurry is measured by an oxygen bomb calorimeter, the measurement result is 25.8MJ/kg (more than 23 MJ/kg), the calorific value is obviously higher than the feeding calorific value requirement (generally more than 15 MJ/kg) of the slurry feeding gasifier, and the efficiency of the gasifier is greatly improved.

As described above, exemplary embodiments of the present invention are described in detail with reference to the accompanying drawings. It should be understood that the invention is not intended to be limited to these specific details as set forth in the following description. Equivalent or similar changes to the structure and features of the exemplary embodiments may be made without departing from the spirit and scope of the present invention, which changes will also fall within the protection scope of the invention as defined in the appended claims.

Claims (7)

1. A production method of biomass oil coke slurry is characterized by comprising the steps of carrying out high-temperature pyrolysis treatment on biomass raw materials; and then mixing the biomass oil of the pyrolysis product with biomass coke powder to obtain the biomass oil.

2. The method of claim 1, wherein the biomass feedstock is selected from forestry and agricultural residues and/or household garbage.

3. The production method according to claim 1 or 2, wherein the temperature of the pyrolysis treatment is 500 to 600 ℃; the pyrolysis treatment time is 10-30min.

4. The production method according to claim 1 or 2, wherein the ratio of the biomass oil of the pyrolysis product to the biomass coke powder in parts by weight is (60-80): (20-40), preferably 60:40.

5. The method of producing according to claim 1 or 2, further comprising adding an additive to the pyrolysis product biomass oil and the biomass char, and a ratio of a mass of the additive to a total mass of the pyrolysis product biomass oil and the biomass char is (0.1 to 0.3): 100 Preferably 0.1): 100.

6. the method according to claim 5, wherein the additive is sodium dodecylbenzenesulfonate or an OP emulsifier, preferably an OP emulsifier, more preferably an OP-10 emulsifier.

7. The method for generating the biomass oil coke slurry is characterized by comprising the following steps in sequence:

1) Crushing the collected biomass raw material into a crushed material with the particle size smaller than 10 mm; drying the crushed materials to prepare pretreated biomass raw materials for later use;

2) Placing the pretreated biomass raw material into a pyrolysis furnace, and performing high-temperature pyrolysis treatment to obtain pyrolysis products biomass gas, biomass oil and biomass coke; wherein the biomass fuel gas and part of biomass oil which are pyrolysis products are combusted in the pyrolysis furnace to provide heat for high-temperature pyrolysis; injecting the residual biomass oil into a container with a stirrer for standby;

3) Grinding and separating biomass coke of pyrolysis products to obtain biomass coke powder with the particle size smaller than 90 mu m;

4) And (3) sending the collected biomass coke powder, the biomass oil which is the pyrolysis product and the additive into a container with a stirrer, and stirring and uniformly mixing to obtain the biomass oil coke slurry.