Production system of biomass coal water slurry
By liquefying and modifying biomass in the biomass coal-water slurry production system, the problem of difficulty in co-forming biomass and raw coal into slurry is solved, and efficient biomass utilization and production cost reduction are achieved.
Patent Information
- Application Number
- CN202420964878.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing biomass water and coal slurry technology is difficult to slurry together with the raw material coal, resulting in the biomass water and coal slurry technology not being widely used in industrial applications, and the traditional process is complex and consumes high.
By introducing biomass liquefied units and lignin modified units in the biomass coal slurry production system, the biomass uses chemical methods to liquefy and modify the biomass to destroy the cell structure and hydrophilicity of biomass, so that it is with raw materials coal with raw materials coal Can become a slurry.
The coexistence of biomass and raw material coal is realized, the utilization rate of biomass is improved, the cost of production is reduced, the scope of application of biomass raw materials has been expanded, and the discharge of oxides is reduced.
Smart Images
Figure CN222389787U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water-coal slurry production, in particular to a production system of biomass water-coal slurry. Background Art
[0002] Coal-water slurry is one of the important ways to cleanly utilize coal. It can not only be used as a substitute for oil fuel to provide energy through combustion, but also as a basic raw material to produce chemicals such as ethylene glycol and olefins through gasification. In addition, the introduction of biomass into the coal-water slurry system can further enhance its green and efficient characteristics. This technology has attracted widespread attention at home and abroad in recent years.
[0003] Coal-water slurry is obtained by physical processing of raw coal, water and additives. It needs to have high concentration, qualified particle size, low apparent viscosity, good fluidity and high stability to meet the performance requirements of storage, transportation and atomization in process production. However, natural biomass mainly contains cellulose, lignin, hemicellulose and other components, among which cellulose and hemicellulose contain a large number of hydrophilic hydroxyl groups, which easily bind the free water in the coal slurry, thus having an adverse effect on the slurry. It is difficult for biomass and raw coal to form a slurry together. Therefore, biomass coal-water slurry technology has not been applied on a large scale in industry so far.
[0004] At present, the biomass energy industry processes agricultural waste such as rice husks, straw, and wood and bamboo materials into high-density, low-moisture biomass pellets through crushing, extrusion and granulation technology. The biomass pellets are then used to produce high-temperature and high-pressure raw coal gas through pulverized coal gasification technology, with a blending ratio of 5-10%. However, this process requires the biomass raw materials to be pre-treated through drying, crushing, extrusion and other processes, which is complex and consumes a lot of energy. Utility Model Content
[0005] The utility model aims to provide a production system of biomass water-coal slurry to overcome the defects in the prior art.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A biomass water-coal slurry production system, the system at least comprises a biomass liquefaction unit for liquefying biomass; a lignin modification unit for modifying the liquefied biomass in the aforementioned biomass liquefaction unit; the lignin modification unit, a coal mill water pipeline and a raw coal storage bin are respectively connected to the coal mill, and the coal mill is connected to a gasifier for combustion.
[0008] The beneficial effects of the utility model are as follows: the utility model abandons the traditional process route, modifies the biomass by chemical methods, destroys the original cell structure in the biomass, and improves the hydrophilicity of cellulose, lignin, and hemicellulose, so that the biomass and raw coal can be co-pulped; thereby achieving the characteristics of improving the utilization rate of biomass and reducing production costs.
[0009] Preferably, the biomass liquefaction unit comprises an alkali solution preparation section and a biomass raw material pretreatment section, the alkali solution preparation section, the biomass raw material pretreatment section and the sodium sulfite storage tank are respectively connected to the steam explosion reactor, and the steam explosion reactor is connected to the lignin modification unit through the liquefied biomass pretreatment section.
[0010] Preferably, the alkali solution preparation unit comprises an alkali solution storage tank and a desalted water pipeline, the alkali solution storage tank is connected to the alkali solution tank through a discharge pump; the desalted water pipeline is connected to the alkali solution tank and the steam explosion reactor respectively; the alkali solution tank is connected to the steam explosion reactor through an alkali adding pump.
[0011] Preferably, the biomass raw material pretreatment unit comprises a biomass raw material storage tank, which is connected to the steam explosion reactor via a crusher, a biomass powder silo and a screw conveyor in sequence.
[0012] Preferably, the liquefied biomass pretreatment unit comprises a storage tank connected to the outlet of the steam explosion reactor, and the storage tank is connected to the lignin modification unit via a first metering pump and a steam heater.
[0013] Preferably, the lignin modification unit comprises a sulfonation reaction section, the sulfonation reaction section, the liquefied biomass pretreatment section and the formaldehyde storage tank are respectively connected to the modification reactor, and the outlet of the modification reactor is connected to the coal mill through the modified biomass buffer tank.
[0014] Preferably, the liquefied biomass pretreatment unit comprises an acetone storage tank and a sulfonating agent storage tank, the acetone storage tank and the sulfonating agent storage tank are respectively connected to the sulfonation reactor, and the outlet of the sulfonation reactor is connected to the inlet of the modification reactor through the sulfonation reaction buffer tank and the second metering pump.
[0015] A biomass water-coal slurry production system is made according to the above scheme. The utility model abandons the traditional process route, and liquefies the biomass to destroy its cell structure and complex pore structure to release the adsorbed water therein in the form of free water, thereby improving the slurry concentration and slurryability of the biomass water-coal slurry; further, the fully liquefied biomass is modified, the liquefied biomass can be better modified, and the modified lignin can be used as a water-coal slurry additive; compared with the traditional technology, it does not require grinding and drying, so it is suitable for the low grindability index, high water content, and low stacking properties of biomass. In order to overcome the disadvantage of density, most agricultural and forestry biomass such as rice husks, straws, feathers, furfural residues, etc. can be used, thus expanding the scope of biomass raw materials; at the same time, the modified lignin is used as a dispersant in water-coal slurry additives to reduce the production cost of water-coal slurry; further, due to the high proportion of biomass, the cell structure is destroyed and the hydrophilicity of the main components is improved by chemically modifying the overall biomass, which can minimize the impact of biomass on slurry properties and increase usage; it has the characteristics of reducing the consumption of raw coal, reducing production costs, reducing oxide emissions and improving biomass utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the utility model.
[0017] In the figure: 1. desalted water pipeline; 2. alkali solution storage tank; 3. unloading pump; 4. alkali solution tank; 5. alkali adding pump; 6. sodium sulfite storage tank; 7. steam explosion reactor; 8. biomass raw material storage tank; 9. crusher; 10. biomass powder silo; 11. screw conveyor; 12. storage tank; 13. first metering pump; 14. steam heater; 15. modified reactor; 16. formaldehyde storage tank; 17. second metering pump; 18. sulfonation reaction buffer tank; 19. sulfonation reactor; 20. acetone storage tank; 21. sulfonating agent storage tank; 22. modified biomass buffer tank; 23. coal mill; 24. coal mill water pipeline; 25. raw coal storage silo; 26. gasifier. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0019] Reference Figure 1As shown, a production system of biomass water-coal slurry, the system at least includes a biomass liquefaction unit for realizing biomass liquefaction; a lignin modification unit for modifying the liquefied biomass in the aforementioned biomass liquefaction unit; the lignin modification unit, the coal mill water pipeline 24 and the raw coal storage bin 25 are respectively connected to the coal mill 23, and the coal mill 23 is connected to the gasifier 26 for combustion. The utility model is provided with a biomass liquefaction unit for realizing biomass liquefaction to liquefy the biomass to destroy its cell structure and complex pore structure so as to release the adsorbed water therein in the form of free water, thereby improving the coal slurry concentration and slurrying property of the biomass water-coal slurry, and the liquefied biomass is modified by the lignin modification unit so as to be used as a dispersant for water-coal slurry; compared with the prior art, it can expand the scope of application of biomass, increase the proportion of biomass, and reduce the production cost of water-coal slurry.
[0020] Furthermore, the biomass liquefaction unit includes an alkali solution preparation unit and a biomass raw material pretreatment unit, wherein the alkali solution preparation unit, the biomass raw material pretreatment unit and the sodium sulfite storage tank 6 are respectively connected to the steam explosion reactor 7, and the steam explosion reactor 7 is connected to the lignin modification unit through the liquefied biomass pretreatment unit. The liquefaction of the biomass is achieved in the steam explosion reactor 7 by using the alkali solution from the alkali solution preparation unit and the biomass and sodium sulfite from the biomass raw material pretreatment unit.
[0021] Furthermore, the alkali solution preparation unit includes an alkali solution storage tank 2 and a desalted water pipeline 1, wherein the alkali solution storage tank 2 is connected to an alkali solution tank 4 via a discharge pump 3; the desalted water pipeline 1 is respectively connected to an alkali solution tank 4 and a steam explosion reactor 7; and the alkali solution tank 4 is connected to the steam explosion reactor 7 via an alkali adding pump 5. The alkali solution tank 4 is mainly used to configure an alkali solution with a suitable concentration, and the alkali solution configured in the alkali solution tank 4 described in the utility model is a 30% concentration NaOH solution.
[0022] Furthermore, the biomass raw material pretreatment unit includes a biomass raw material storage tank 8, which is connected to the steam explosion reactor 7 in sequence through a crusher 9, a biomass powder bin 10 and a screw conveyor 11. The above arrangement enables the biomass raw material to be crushed and quantitatively fed into the steam explosion reactor 7, thereby laying the foundation for the full liquefaction of the biomass raw material.
[0023] Furthermore, the liquefied biomass pretreatment section includes a storage tank 12 connected to the outlet of the steam explosion reactor 7, and the storage tank 12 is connected to the lignin modification unit through a first metering pump 13 and a steam heater 14. By setting up the liquefied biomass pretreatment section, the liquefied biomass can be quantitatively quantified and the temperature can be increased before entering the lignin modification unit for modification.
[0024] Furthermore, the lignin modification unit includes a sulfonation reaction part, the sulfonation reaction part, the liquefied biomass pretreatment part and the formaldehyde storage tank 16 are respectively connected to the modification reactor 15, and the outlet of the modification reactor 15 is connected to the coal mill 23 through the modified biomass buffer tank 22. The utility model allows the product after the sulfonation reaction to enter the modification reactor 15 together with formaldehyde and liquefied biomass to be carried out, so as to meet the purpose of the device as a dispersant.
[0025] Furthermore, the liquefied biomass pretreatment unit includes an acetone storage tank 20 and a sulfonating agent storage tank 21, which are respectively connected to a sulfonation reactor 19, and the outlet of the sulfonation reactor 19 is connected to the inlet of the modification reactor 15 through a sulfonation reaction buffer tank 18 and a second metering pump 17. Through the above arrangement, acetone and the sulfonating agent enter the sulfonation reactor 19 for sulfonation reaction to meet the needs of subsequent production. The sulfonating agent described in the utility model can be a sodium sulfite solution.
[0026] The working principle of the utility model is as follows: the biomass raw material in the biomass raw material storage tank 8 is crushed into powder with a particle size below 100 mesh by a crusher 9 and then stored in a biomass powder bin 10; the desalted water in the alkali solution storage tank 2 and the desalted water pipeline 1 enters the alkali solution tank 4 together to prepare a 30% concentration NaOH solution; a 30% concentration sodium hydroxide solution of the crushed biomass powder and sodium sulfite from the sodium sulfite storage tank 6 are sequentially added to the steam explosion reactor 7, wherein the mass proportion of sodium hydroxide in the mixture in the steam explosion reactor 7 is 4-9%, the mass proportion of biomass is 15-30%, and the mass proportion of sodium sulfite is 5-10%, the reaction temperature is controlled at 130-160°C, and the pressure is maintained at 0.4-0.6Mpa for 20-60min; the above-mentioned explosive products are stored in the storage tank 12; the acetone and sulfonating agent storage tanks in the acetone storage tank 20 The sodium sulfite solution in 21 enters the sulfonation reactor 19 together, the molar ratio of sodium sulfite to acetone is 0.5:1, the sulfonation reaction is carried out at 45-60°C for 80-120min, and the sulfonated product is stored in the sulfonation reaction buffer tank 18; the aforementioned sulfonated product and the steam-exploded biomass enter the modification reactor 15, and formaldehyde from the formaldehyde storage tank 16 is slowly added dropwise, the molar ratio of formaldehyde to acetone is 1.5:1, the steam-exploded biomass accounts for 40-60%, and the condensation reaction is carried out at 80-100°C for 3-5h, and the product is stored in the modified biomass buffer tank 22; the modified biomass, the pulverized coal water from the pulverized coal water pipeline 24 and the raw coal from the raw coal storage bin 25 are prepared into qualified biomass water-coal slurry through a wet pulping process under the action of the pulverizer 23, and are transported to the gasifier 26 to react and generate raw coal gas. The utility model overcomes the defects of traditional technologies in which biomass is processed by crushing, drying, carbonization and other technologies, which have high processing costs, narrow raw material applicability, and cannot completely improve its pulping properties, and has the following characteristics: 1. The biomass raw material has a wide range of applications. Since it is mainly processed by chemical modification and does not require grinding and drying, it is adapted to the shortcomings of low grindability index, high water content, and low bulk density of biomass. Most agricultural and forestry biomass such as rice husks, straws, feathers, and furfural residues can be used; 2. The cost of additives is eliminated. A large amount of lignin in the biomass can be directly used as a dispersant after chemical modification, so there is no need to add additional water-coal slurry additives; 3. The proportion of biomass is high. By chemically modifying the entire biomass, its cell structure is destroyed, and the hydrophilicity of the main components is improved, which can minimize the impact of biomass on pulping properties, thereby increasing usage. Furthermore, the utility model reduces the consumption of raw coal and reduces production costs by replacing raw coal with biomass; in addition, every addition of 10-15% of biomass can reduce the emission of oxides by 60-70%, thus having the characteristic of reducing oxide emissions.
[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A biomass water-coal slurry production system, characterized in that: The system comprises at least a biomass liquefaction unit for liquefying biomass; a lignin modification unit for modifying the liquefied biomass in the aforementioned biomass liquefaction unit; The lignin modification unit, the coal grinding water pipeline (24) and the raw coal storage bin (25) are respectively connected to the coal grinding machine (23), and the coal grinding machine (23) is connected to the gasification furnace (26) for combustion.
2. A biomass water-coal slurry production system according to claim 1, characterized in that: The biomass liquefaction unit comprises an alkali solution preparation section and a biomass raw material pretreatment section. The alkali solution preparation section, the biomass raw material pretreatment section and the sodium sulfite storage tank (6) are respectively connected to a steam explosion reactor (7). The steam explosion reactor (7) is connected to the lignin modification unit via the liquefied biomass pretreatment section.
3. A biomass water-coal slurry production system according to claim 2, characterized in that: The alkali solution preparation unit comprises an alkali solution storage tank (2) and a desalted water pipeline (1). The alkali solution storage tank (2) is connected to the alkali solution tank (4) via a discharge pump (3); The desalted water pipeline (1) is connected to the alkali solution tank (4) and the steam explosion reactor (7) respectively; The alkali solution tank (4) is connected to the steam explosion reactor (7) via an alkali adding pump (5).
4. A biomass water-coal slurry production system according to claim 2, characterized in that: The biomass raw material pretreatment unit comprises a biomass raw material storage tank (8), which is connected to a steam explosion reactor (7) via a crusher (9), a biomass powder bin (10) and a screw conveyor (11) in sequence.
5. The biomass water-coal slurry production system according to claim 2, characterized in that: The liquefied biomass pretreatment unit comprises a storage tank (12) connected to the outlet of the steam explosion reactor (7), and the storage tank (12) is connected to the lignin modification unit via a first metering pump (13) and a steam heater (14).
6. The biomass water-coal slurry production system according to claim 2, characterized in that: The lignin modification unit comprises a sulfonation reaction section, wherein the sulfonation reaction section, the liquefied biomass pretreatment section and the formaldehyde storage tank (16) are respectively connected to the modification reaction kettle (15), and the outlet of the modification reaction kettle (15) is connected to the coal mill (23) through the modified biomass buffer tank (22).
7. A biomass water-coal slurry production system according to claim 6, characterized in that: The liquefied biomass pretreatment unit comprises an acetone storage tank (20) and a sulfonating agent storage tank (21), the acetone storage tank (20) and the sulfonating agent storage tank (21) are respectively connected to a sulfonation reactor (19), and the outlet of the sulfonation reactor (19) is connected to the inlet of the modification reactor (15) through a sulfonation reaction buffer tank (18) and a second metering pump (17).