A method for treating biomass solid waste

Abstract

The application provides a biomass solid waste treatment method, and belongs to the technical field of solid waste resource utilization. The hydroxyl and carboxyl in the biomass sample powder can be combined with the polar organic solvent in the organic solvent by using a pretreatment agent to pre-soak the biomass sample powder. Under the addition of an additive, the hydroxyl and carboxyl in the biomass sample powder can be combined with the non-polar organic solvent in the organic solvent. The two combination modes can realize the wrapping of the organic solvent on the biomass sample powder, form the micro oil droplet structure of oil containing biomass, saturate the biomass adsorption, realize the physical modification of the surface of the biomass sample powder, reduce the water absorption characteristics of the biomass, finally prevent the agglomeration and viscosity increase of the biomass organic slurry, and the stratification problem, improve the utilization rate of the biomass solid waste, and the obtained biomass raw slurry can be directly gasified or used for the preparation of an organic hazardous waste slurry.

Description

Technical Field

[0001] The present invention relates to the technical field of solid waste resource utilization, and in particular to a method for treating biomass solid waste. Background Art

[0002] Biomass energy is a form of green energy, and its resource utilization is a hot research topic. Biomass utilization technologies primarily focus on four areas: energy, feed, fertilizer, and material. Biomass energy utilization technologies include direct combustion (for power generation or heating), fuel preparation, gaseous fuel production (biogas, biogas, etc.), and liquid fuel production (bioethanol, biodiesel, etc.). Biomass feed technologies include silage, microbial feed, ammoniated feed, and single-cell protein feed. Biomass material utilization technologies primarily include construction materials (fiberboard, particleboard, sawdust board, rice hull board, etc.), food raw materials and pharmaceutical intermediates (xylooligosaccharides, xylitol, ferulic acid, etc.), bio-based polymer materials (modifying natural polymers to produce new biomass materials, preparing biodegradable bio-based polymer materials, etc.), and environmentally friendly tableware.

[0003] The utilization of biomass generates a significant amount of biomass solid waste. This waste can be categorized into three main types: agriculture and forestry (crop waste, livestock and poultry manure, and forestry processing waste), industry (vintner's grains, pressing byproducts, and pharmaceutical residues), and municipal solid waste (food waste, municipal garden waste, and household waste). Existing treatment methods for biomass solid waste primarily include incineration, biochemical treatment, and pyrolysis. Biomass incineration is primarily used for power generation; biochemical treatment primarily utilizes anaerobic digestion, while pyrolysis primarily utilizes fixed-bed pyrolysis gasification. Fixed-bed biomass gasification is a highly efficient biomass solid waste utilization technology. The biomass fixed-bed gasification process requires the biomass to be pelletized. After drying and compression, the pellets are then placed in a fixed-bed for gasification. This process is suitable for treating only single biomass solid waste and targets a limited number of biomass materials. It typically utilizes agricultural and forestry solid waste, making it difficult to utilize industrial solid waste.

[0004] The existing organic hazardous waste gasification and high-temperature melting resource utilization technology uses organic hazardous waste to prepare a mixed liquid, which is then gasified and melted to produce synthesis gas. This can achieve the mixed use of multiple solid wastes, but the amount of biomass solid waste added is relatively low, with the biomass solid waste content accounting for less than 10wt% of the mixed liquid. The main reason is that biomass itself has a strong water absorption effect, which results in extremely poor fluidity of the mixed liquid and makes it difficult to transport. Summary of the Invention

[0005] In view of this, the object of the present invention is to provide a method for treating biomass solid waste. The method of the present invention can physically modify the surface of biomass solid waste, reduce the water absorption characteristics of biomass, and ultimately improve the utilization rate of biomass solid waste.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] The present invention provides a method for treating biomass solid waste, comprising the following steps:

[0008] Dehydrating the biomass solid waste to obtain biomass solids;

[0009] The biomass solids are sequentially dried and crushed to obtain biomass sample powder;

[0010] Mixing the biomass sample powder with a pretreatment agent and pre-immersing the mixture to obtain a biomass raw material slurry, wherein the pretreatment agent includes an organic solvent, an auxiliary agent, and an additive;

[0011] performing solid-liquid separation on a portion of the biomass raw material slurry to obtain a solid material;

[0012] mixing the solid material, industrial wastewater and industrial organic waste to obtain an organic hazardous waste slurry;

[0013] The organic hazardous waste slurry and the remaining biomass raw material slurry are mixed and then gasified to obtain synthesis gas.

[0014] Preferably, the pretreatment agent comprises the following components in mass fractions: 90-95% of an organic solvent, 4-7% of an auxiliary agent, and 1-3% of an additive.

[0015] Preferably, the auxiliary agent includes one or more of a surfactant, a stabilizer, a dispersant and an emulsifier.

[0016] Preferably, the additive comprises sodium carbonate.

[0017] Preferably, the organic solvent includes one or more of benzene, toluene, xylene, pentane, hexane, octane, cyclohexane, cyclohexanone, toluene-cyclohexanone, chlorobenzene, dichlorobenzene, dichloromethane, methanol, ethanol, isopropanol, ethyl ether, propylene oxide, methyl acetate, ethyl acetate, propyl acetate, acetone, methyl butyl ketone, methyl isobutyl ketone, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, acetonitrile, pyridine, phenol, HW06 waste organic solvent and HW42 waste organic solvent.

[0018] Preferably, the mass ratio of the pretreatment agent to the biomass sample powder is 1:2~1.

[0019] Preferably, the mass content of the organic solvent in the solid material is 35% to 55%.

[0020] Preferably, the industrial organic waste includes one or more of industrial hazardous waste HW11, industrial hazardous waste HW17 and industrial hazardous waste HW37.

[0021] Preferably, the calorific value of the hazardous organic waste slurry is 12,000-21,000 J / g, the fluidity is 400-1,800 cps, and the ash melting point is 1,100-1,300°C.

[0022] Preferably, the gasification temperature is 1100-1350° C. and the pressure is 5-10 MPa.

[0023] The present invention provides a method for treating biomass solid waste, comprising the following steps: dehydrating the biomass solid waste to obtain biomass solids; drying and crushing the biomass solids in sequence to obtain biomass sample powder; mixing the biomass sample powder with a pretreatment agent for pre-soaking treatment to obtain biomass raw material slurry, wherein the pretreatment agent includes an organic solvent, an auxiliary agent and an additive; performing solid-liquid separation on a portion of the biomass raw material slurry to obtain a solid material; mixing the solid material, industrial wastewater and industrial organic waste to obtain an organic hazardous waste slurry; and gasifying the organic hazardous waste slurry and the remaining biomass raw material slurry after mixing to obtain synthesis gas.

[0024] The present invention performs a pre-soaking treatment on biomass sample powder by using a pretreatment agent to modify the microscopic surface of the biomass. The hydroxyl and carboxyl groups in the biomass sample powder can combine with the polar organic solvent in the organic solvent. With the addition of an auxiliary agent, the hydroxyl and carboxyl groups in the biomass sample powder can combine with the non-polar organic solvent in the organic solvent. The two combination modes will realize the encapsulation of the biomass sample powder by the organic solvent, forming a microscopic oil droplet structure of oil-enclosed biomass, saturating the biomass adsorption, and further realizing physical modification of the surface of the biomass sample powder, reducing the water absorption characteristics of the biomass, and ultimately preventing the problems of agglomeration, increased viscosity, and stratification of the biomass organic slurry, thereby improving the utilization rate of biomass solid waste. The obtained biomass raw material slurry can be used for subsequent direct gasification treatment or for the preparation of organic hazardous waste slurry.

[0025] Moreover, the biomass raw material slurry in the present invention has two uses. It can be directly used as a gasification raw material for gasification, and can also be mixed with industrial wastewater and industrial organic waste to obtain organic hazardous waste slurry. After the biomass raw material slurry is separated by solid-liquid separation to remove part of the organic solvent, the remaining solid material can be used as the main raw material for organic hazardous waste slurry. The components of industrial wastewater and industrial organic waste are complex and diverse. At the same time, some industrial organic waste is mostly organic waste salt with low calorific value. During the gasification process, the low calorific value cannot maintain the high-temperature gasification environment. The biomass raw material slurry is composed of dry biomass and organic solvent. Its calorific value is stable and high. By configuring it with industrial organic waste, the overall calorific value of organic hazardous waste can be improved. The fluidity of the slurry is then adjusted with industrial wastewater to achieve the purpose of improving the fluidity of the organic hazardous waste slurry.

[0026] Moreover, the present invention first dehydrates, dries, crushes, and prepares biomass raw material slurry before adding industrial wastewater and industrial organic waste. Compared with the method of dehydrating, drying, and crushing the biomass and then preparing organic hazardous waste, organic solvents, industrial wastewater, and biomass powder, the amount of biomass powder added can achieve a 2-fold increase in effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic flow chart of the biomass solid waste treatment method provided by the present invention;

[0028] Figure 2 This is a physical picture of the organic hazardous waste slurry prepared in the comparative example. DETAILED DESCRIPTION

[0029] The present invention provides a method for treating biomass solid waste, comprising the following steps:

[0030] Dehydrating the biomass solid waste to obtain biomass solids;

[0031] The biomass solids are sequentially dried and crushed to obtain biomass sample powder;

[0032] Mixing the biomass sample powder with a pretreatment agent and pre-immersing the mixture to obtain a biomass raw material slurry, wherein the pretreatment agent includes an organic solvent, an auxiliary agent, and an additive;

[0033] performing solid-liquid separation on a portion of the biomass raw material slurry to obtain a solid material;

[0034] mixing the solid material, industrial wastewater and industrial organic waste to obtain an organic hazardous waste slurry;

[0035] The organic hazardous waste slurry and the remaining biomass raw material slurry are mixed and then gasified to obtain synthesis gas.

[0036] The present invention dehydrates biomass solid waste to obtain biomass solids.

[0037] The present invention has no particular limitation on the source of the biomass solid waste, and any source well known to those skilled in the art may be used, such as biomass fermentation residue, livestock manure, or pharmaceutical residue.

[0038] In the present invention, liquid is preferably obtained after the dehydration, and the liquid is preferably subjected to a biochemical treatment. The present invention has no particular limitation on the specific method of the biochemical treatment, and methods well known to those skilled in the art can be used.

[0039] In the present invention, the dehydration method is preferably mechanical dehydration, more preferably centrifugation. The function of the dehydration is to separate the free water in the biomass solid waste from the biomass solid, reduce the moisture content of the biomass solid waste itself, and provide conditions for subsequent biomass drying.

[0040] In the present invention, the moisture content of the biomass solid is preferably 20% to 30%. If the moisture content is higher than this, dehydration should be performed again.

[0041] After obtaining the biomass solid, the present invention sequentially dries and pulverizes the biomass solid to obtain biomass sample powder.

[0042] In the present invention, the drying is preferably oven drying, the oven drying temperature is preferably 100-150° C., the oven drying time is preferably 0.5-2 h, and the heat source for the oven drying is preferably steam heating.

[0043] In the present invention, the drying is preferably performed to a moisture content of less than 15%, more preferably 1% to 10%.

[0044] In the present invention, the biomass sample obtained by pulverization preferably passes through an 80-mesh standard sieve, and the 150-mesh powder preferably accounts for 20% to 50% of the total mass, and the 300-mesh powder preferably accounts for 10% to 20% of the total mass.

[0045] After obtaining the biomass sample powder, the present invention mixes the biomass sample powder with a pretreatment agent and pre-immerses the mixture to obtain a biomass raw material slurry, wherein the pretreatment agent includes an organic solvent, an auxiliary agent, and an additive.

[0046] In the present invention, the pretreatment agent preferably comprises the following components in mass fractions: 90-95% of an organic solvent, 4-7% of an auxiliary agent, and 1-3% of an additive.

[0047] In the present invention, the auxiliary agent preferably includes one or more of a surfactant, a stabilizer, a dispersant and an emulsifier.

[0048] In the present invention, the mass fraction of the surfactant in the pretreatment agent is preferably 2-3%.

[0049] In the present invention, the surfactant preferably includes an anionic surfactant and a cationic surfactant, and the mass ratio of the anionic surfactant to the cationic surfactant is preferably 0.5 to 1:1.

[0050] In the present invention, the anionic surfactant preferably includes sodium alkylbenzene sulfonate, olefin sulfonate or fatty acid sulfonalkyl ester.

[0051] In the present invention, the cationic surfactant preferably includes alkylaminoacetate, polyquaternium salt or fatty imidazoline acetate.

[0052] In the present invention, the mass fraction of the stabilizer in the pretreatment agent is preferably 1-2%.

[0053] In the present invention, the stabilizer preferably includes one or more of zinc stearate, cadmium stearate and calcium stearate.

[0054] In the present invention, the mass fraction of the dispersant in the pretreatment agent is preferably 0.5-1%.

[0055] In the present invention, the dispersant preferably includes sodium oleate C 17 H 33 One or more of COONa, carboxylates, sulfates and sulfonates.

[0056] In the present invention, the mass fraction of the emulsifier in the pretreatment agent is preferably 0.5-1%.

[0057] In the present invention, the emulsifier preferably includes one or more of N-dodecyldimethylamine, its amine derivatives, and quaternary ammonium salts.

[0058] In the present invention, the additive preferably includes sodium carbonate.

[0059] In the present invention, the organic solvent preferably includes one or more of benzene, toluene, xylene, pentane, hexane, octane, cyclohexane, cyclohexanone, toluene-cyclohexanone, chlorobenzene, dichlorobenzene, dichloromethane, methanol, ethanol, isopropanol, ether, propylene oxide, methyl acetate, ethyl acetate, propyl acetate, acetone, methyl butyl ketone, methyl isobutyl ketone, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, acetonitrile, pyridine, phenol, HW06 waste organic solvent and HW42 waste organic solvent.

[0060] In the present invention, the organic solvent preferably includes a polar organic solvent and a non-polar organic solvent.

[0061] In the present invention, the mass ratio of the pretreatment agent to the biomass sample powder is preferably 1:2~1.

[0062] In the present invention, the mixing process is preferably: mixing the biomass sample powder with a non-polar organic solvent, a polar organic solvent, a cationic surfactant, an anionic surfactant, a dispersant, a stabilizer and an additive in sequence.

[0063] In the present invention, the viscosity of the biomass raw material slurry is preferably between 100 and 400 cps. This facilitates atomization of the material during the gasification process, achieving complete gasification of the biomass. It also ensures that the non-polar organic solvent is completely adsorbed on the surface of the biomass powder, achieving physical modification of the biomass powder surface. If the prepared biomass slurry does not reach this range, the mass ratio of the biomass sample powder to the pretreatment agent is preferably readjusted to achieve this range.

[0064] After obtaining the biomass raw material slurry, the present invention performs solid-liquid separation on a portion of the biomass raw material slurry to obtain a solid material.

[0065] In the present invention, the solid-liquid separation is preferably performed sequentially by centrifugation and filtration.

[0066] In the present invention, the mass content of the organic solvent in the solid material is preferably 35% to 55%.

[0067] In the present invention, the solid-liquid separation preferably further produces a liquid, and the present invention preferably reuses the liquid as the pretreatment agent.

[0068] After obtaining the solid material, the present invention mixes the solid material, industrial wastewater and industrial organic waste to obtain organic hazardous waste slurry.

[0069] In the present invention, the industrial organic waste preferably includes one or more of industrial hazardous waste HW11, industrial hazardous waste HW17 and industrial hazardous waste HW37.

[0070] In the present invention, the mass ratio of the solid material, industrial organic waste, and industrial wastewater is preferably 1-2:1-2:0.5-1. In the present invention, during the mixing process of the solid material, industrial wastewater, and industrial organic waste, due to the strong water absorption characteristics of the solid material, it first combines with the water in the industrial wastewater, thereby forming a hydrogen bond structure, resulting in a slurry with a high viscosity, causing the problem of excessive slurry viscosity. However, adding a large amount of industrial wastewater will cause the slurry calorific value to be too low, making it difficult to burn during gasification, and ultimately resulting in the inability to treat biomass and organic hazardous waste. The present invention controls the mass ratio of the solid material, industrial organic waste, and industrial wastewater to ensure complete gasification.

[0071] In the present invention, the calorific value of the hazardous organic waste slurry is preferably 12,000 to 21,000 J / g, the fluidity is preferably 400 to 1,800 cps, and the ash melting point is preferably 1,100 to 1,300°C.

[0072] In the present invention, the solid content of the hazardous organic waste slurry is preferably 35% to 55%.

[0073] After obtaining the organic hazardous waste slurry, the present invention mixes the organic hazardous waste slurry with the remaining biomass raw material slurry and then gasifies them to obtain synthesis gas.

[0074] In the present invention, the gasification temperature is preferably 1100-1350° C., and the pressure is preferably 5-10 MPa.

[0075] In the present invention, the gasification is preferably performed in a reducing atmosphere.

[0076] In the present invention, the synthesis gas preferably includes CO and H2.

[0077] In the present invention, the gasification preferably further produces a molten inorganic substance, and the molten inorganic substance is preferably quenched with water to form a water-quenched slag.

[0078] In the present invention, the gasification is preferably performed in a gasification furnace.

[0079] The gasification conditions can achieve complete gasification treatment of the organic hazardous waste slurry and the remaining biomass raw material slurry, ensuring the output and concentration of synthesis gas.

[0080] In the present invention, the manner in which the hazardous organic waste slurry and the remaining biomass raw material slurry enter the gasifier is preferably determined by the gasifier nozzle. When the material channel is preferably a single channel, the material enters individually. If the material channel is preferably two channels, the hazardous organic waste slurry and the remaining biomass raw material slurry preferably enter at a mass flow rate of 1:1.

[0081] Figure 1 This is a schematic flow chart of the method for treating biomass solid waste provided by the present invention.

[0082] In order to further illustrate the present invention, the biomass solid waste treatment method provided by the present invention is described in detail below with reference to examples, but they should not be construed as limiting the scope of protection of the present invention.

[0083] Example 1

[0084] In this embodiment, pharmaceutical waste residue Fritillaria thunbergii is used to prepare the biomass raw material slurry. The characteristics of Fritillaria thunbergii biomass solid waste are shown in Table 1.

[0085] Table 1 Properties of Fritillaria thunbergii biomass samples

[0086]

[0087] One ton of solid waste sample of Fritillaria thunbergii was sent to a normal speed centrifuge for centrifugal drying, and the centrifugation time was 15 minutes. After preliminary centrifugation, 214 kg of biomass centrifuge liquid was obtained, which was sent to a biochemical pool for biochemical treatment. The solid was dried in a dryer, and the drying time was controlled at 0.5 hours. The dry biomass mass after drying was 532 kg, and the moisture content was 5%. The dry biomass sample was sent to a rod mill for grinding, and the ground biomass sample was sieved using an 80-mesh screen. The sieved Fritillaria thunbergii sample powder was used for the subsequent preparation of biomass raw material slurry.

[0088] The pretreatment agent components selected for the biomass raw material slurry configuration are as follows: polar solvents: waste DMF, waste isopropanol (mass ratio of waste DMF: isopropanol = 1:1); non-polar solvents: waste n-pentane, propyl acetate (mass ratio of waste n-pentane: propyl acetate = 1.5:1); surfactants: sodium alkylbenzene sulfonate, alkyl aminoacetate; stabilizer: calcium stearate; dispersant: sodium oleate; emulsifier: dodecyldimethylamine; additive: sodium carbonate; the specific ingredients are shown in Table 2.

[0089] Table 2 Pretreatment agent composition

[0090]

[0091] Biomass solid powder is sequentially mixed with a nonpolar solvent, a polar solvent, a cationic surfactant, an anionic surfactant, a dispersant, a stabilizer, and an additive. After mixing and stirring, a biomass raw material slurry is formed. The chemical properties of the biomass raw material slurry are shown in Table 3.

[0092] Table 3 Chemical properties of Fritillaria thunbergii biomass pulp

[0093]

[0094] The obtained biomass raw material slurry has good calorific value and fluidity and can be directly used for gasification treatment and utilization in a gasifier.

[0095] Part of the obtained biomass raw material slurry was first sieved with a 120-mesh standard sieve, and the biomass raw material slurry under the sieve was taken for the preparation of organic hazardous waste slurry. The sieved biomass raw material slurry entered the centrifuge for centrifugation to remove excess organic solvent in the biomass raw material slurry. 100 kg of biomass raw material slurry was centrifuged to remove 35 kg of organic solvent. The solid content of the remaining biomass raw material slurry was 64%, which was used for the subsequent preparation of organic hazardous waste slurry. In the process of preparing the organic hazardous waste slurry, the industrial organic waste used was chemical synthesis pharmaceutical distillation residue, and its main chemical component was aromatic chemicals; the industrial wastewater used was printing and dyeing wastewater. In the process of preparing the organic hazardous waste slurry, the mass ratio of each substance was the solid material obtained from the centrifuged biomass raw material: pharmaceutical distillation residue: printing and dyeing wastewater = 1:1:1. The solvent needed to be fully stirred during the preparation process. The chemical properties of the organic hazardous waste slurry after preparation are shown in Table 4.

[0096] Table 4 Chemical properties of organic hazardous waste slurry

[0097]

[0098] After the configuration is complete, the biomass feedstock slurry and the organic hazardous waste slurry enter the gasifier for gasification. The temperature inside the gasifier is controlled at 1150°C and the pressure is controlled at 9 MPa. The biomass feedstock slurry and the organic hazardous waste slurry enter the gasifier in a mass flow ratio of 1:1. The gasifier's material processing capacity is controlled at 1 ton / h. The final syngas contains 42wt% H2 and 41wt% CO, with the remainder being methane and carbon dioxide.

[0099] Comparative Example

[0100] The same as Example 1, the only difference is that the Fritillaria thunbergii biomass solid waste is not pre-mixed with the pretreatment agent after drying and crushing, and the physical picture of the obtained organic hazardous waste slurry is as follows Figure 2 As shown, it can be seen that the organic hazardous waste slurry agglomerates and cannot form a slurry and cannot be gasified.

[0101] Example 2

[0102] The biomass raw material used in this example is pig manure. The material properties of pig manure are shown in the following table.

[0103] Table 5 Properties of pig manure biomass samples

[0104]

[0105] Two tons of pig manure were sent to a normal speed centrifuge for drying, and the centrifugation time was 45 minutes. After the initial centrifugation, 390 kg of biomass centrifuge liquid was obtained, and the centrifuge liquid was sent to a biogas tank for fermentation. The solid matter can be preliminarily dried. When the moisture content of the pig manure biomass sample is 18%, it enters the drying machine for drying. The drying temperature is controlled at 105 ° C and the drying time is 0.5 hours. The final mass of the dried pig manure is 1.1 tons. The dry pig manure is sent to a rod mill for grinding. The ground pig manure is separated using an 80-mesh screen. After removing the pig hair in the pig manure, it is used to prepare biomass raw material slurry.

[0106] The components of the pretreatment agent selected for the biomass raw material slurry configuration are shown in Table 6.

[0107] Table 6 Pretreatment agent composition

[0108]

[0109] The biomass solid powder is sequentially mixed with a non-polar solvent, a polar solvent, a cationic surfactant, an anionic surfactant, a dispersant, a stabilizer and an additive to form a biomass raw material slurry after mixing and stirring.

[0110] The chemical properties of the biomass raw material slurry are shown in the following table.

[0111] Table 7 Pig manure biomass raw material slurry

[0112]

[0113] All data of the pig manure biomass raw material slurry can be fed into the gasifier for gasification treatment, and its high calorific value will be conducive to the increase of the gasification temperature. During the gasification process of the pig manure biomass raw material slurry, the temperature of the gasifier is controlled at 1200°C and the pressure of the gasifier is controlled at 10MPa. The amount of material entering the gasifier is controlled at 0.8 tons / h. The final synthesis gas has an H2 content of 44wt%, a CO content of 40wt%, and the remaining gases are methane and carbon dioxide. The hydrogen content of biomass raw material slurry is higher than that of organic hazardous waste slurry due to its higher calorific value and higher organic content.

[0114] Example 3

[0115] The biomass sample used in this example is cotton stalks. The material properties of cotton stalks are shown in the following table.

[0116] Table 8 Properties of cotton stalk biomass samples

[0117]

[0118] Biomass cotton stalks are high in dry matter and contain relatively low amounts of water. Therefore, 2 tons of biomass cotton stalks can be directly dried in a dryer without centrifugation. The drying temperature is controlled at 105°C and the drying time is 0.5 hours. The final mass of the dried cotton stalks is 1.8 tons. Cotton stalks contain a large amount of cellulose, so the cotton stalk samples should first be pulverized in a grinder for 0.5 hours. After pulverization, the stalks are sent to a rod mill for grinding. The ground cotton stalks are screened with an 80-mesh screen to remove any unground cellulose from the stalks. The remaining material is used to prepare the biomass slurry.

[0119] The components of the pretreatment agent selected for the biomass raw material slurry configuration are shown in Table 9.

[0120] Table 9 Pretreatment agent composition

[0121]

[0122] The biomass solid powder is sequentially mixed with a non-polar organic solvent, a polar organic solvent, a cationic surfactant, an anionic surfactant, a dispersant, a stabilizer and an additive to form a biomass raw material slurry after mixing and stirring.

[0123] The chemical properties of the biomass raw material slurry are shown in the following table.

[0124] Table 10 Cotton stalk biomass raw material pulp

[0125]

[0126] All data of the cotton stalk biomass raw material pulp can be fed into the gasifier for gasification treatment. However, this example is all used for the preparation of organic hazardous waste pulp.

[0127] Part of the obtained biomass raw material slurry is first screened with a 120-mesh standard sieve, and the biomass raw material slurry under the sieve is taken for the preparation of organic hazardous waste slurry. Since the slurry has a high viscosity, it is directly used for the preparation of organic hazardous waste slurry without centrifugation.

[0128] During the preparation of organic hazardous waste slurry, the industrial organic waste used was furfural residue, the main chemical component of which was furfural; the industrial wastewater used was factory washing water, and the mass ratio of organic hazardous waste slurry preparation was solid material: pharmaceutical distillation residue: printing and dyeing wastewater = 1:1:1. The solvent needed to be fully stirred during the preparation process. The chemical properties of the organic hazardous waste slurry after preparation are shown in Table 11.

[0129] Table 11 Chemical properties of organic hazardous waste slurry

[0130]

[0131] The biomass slurry and organic hazardous waste slurry, mixed in a 1:1 ratio, enter the gasifier for gasification. The temperature inside the gasifier is controlled at 1200°C and the pressure is 8 MPa. The material throughput is controlled at 1 ton / h, and the final syngas contains 41wt% H2 and 42wt% CO, with the remainder being methane and carbon dioxide.

[0132] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation thereto. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications shall also be considered within the scope of protection of the present invention.

Claims

1. A method for treating biomass solid waste, characterized in that: The following steps are involved: Dehydrating the biomass solid waste to obtain biomass solids; The biomass solids are sequentially dried and crushed to obtain biomass sample powder; The biomass sample powder is mixed with a pretreatment agent for pre-soaking to obtain a biomass raw material slurry, wherein the pretreatment agent includes an organic solvent, an auxiliary agent and an additive; the additive includes sodium carbonate; the organic solvent includes a polar organic solvent and a non-polar organic solvent; the pretreatment agent includes the following components by mass fraction: 90-95% of the organic solvent, 4-7% of the auxiliary agent and 1-3% of the additive; performing solid-liquid separation on a portion of the biomass raw material slurry to obtain a solid material; Mixing the solid material, industrial wastewater and industrial organic waste to obtain an organic hazardous waste slurry; the mass ratio of the solid material, industrial organic waste and industrial wastewater is 1-2:1-2:0.5-1; The organic hazardous waste slurry and the remaining biomass raw material slurry are mixed and then gasified to obtain synthesis gas.

2. The processing method according to claim 1, characterized in that The auxiliary agent includes one or more of a surfactant, a stabilizer, a dispersant and an emulsifier.

3. The processing method according to claim 1, characterized in that The organic solvent includes one or more of benzene, toluene, xylene, pentane, hexane, octane, cyclohexane, cyclohexanone, toluene-cyclohexanone, chlorobenzene, dichlorobenzene, dichloromethane, methanol, ethanol, isopropanol, ethyl ether, propylene oxide, methyl acetate, ethyl acetate, propyl acetate, acetone, methyl butyl ketone, methyl isobutyl ketone, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, acetonitrile, pyridine, phenol, HW06 waste organic solvent and HW42 waste organic solvent.

4. The processing method according to claim 1, characterized in that The mass ratio of the pretreatment agent to the biomass sample powder is 1:2-1.

5. The processing method according to claim 1, characterized in that The mass content of the organic solvent in the solid material is 35% to 55%.

6. The processing method according to claim 1, characterized in that The industrial organic waste includes one or more of industrial hazardous waste HW11, industrial hazardous waste HW17 and industrial hazardous waste HW37.

7. The processing method according to claim 1, characterized in that The calorific value of the organic hazardous waste slurry is 12000-21000 J / g, the fluidity is 400-1800 cps, and the ash melting point is 1100-1300°C.

8. The processing method according to claim 1, characterized in that The gasification temperature is 1100-1350° C., and the pressure is 5-10 MPa.

Images