Pulverizing equipment, pulverizing unit and system for preparing synthesis gas by taking biomass as raw material

Abstract

The utility model relates to the technical field of biomass energy equipment, in particular to pulverizing equipment, a pulverizing unit and a system for preparing synthesis gas by taking biomass as a raw material. The powder making equipment comprises an equipment shell, a powder making inner part and a rotary separation device, wherein the powder making inner part and the rotary separation device are arranged in the equipment shell from bottom to top in sequence; powder making equipment in a synthesis gas preparation system is creatively improved, and through the structural design of a rotary separation device, the powder making equipment can obtain powder with the particle size smaller than or equal to 2 mm; when the powder preparation equipment is applied to the system for preparing the synthesis gas, the device and the system for preparing the synthesis gas are obtained by adjusting the units in the system and the close fit of the specific structures of the specific equipment in the units, and the beneficial effects that the efficiency is high, the prepared powder is uniform in particle size, and a carbonization device is not needed can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to biomass energy equipment technical field especially, it is a kind of powder equipment, powder unit and with the system for preparing synthesis gas of biomass as raw material. BACKGROUND

[0002] China is a big agricultural country, rural biomass energy resource reserves are extremely rich.But extensive traditional utilization mode (direct combustion) causes adverse environmental impact and resource waste, has no longer adapted to modern production and lifestyle.Therefore, modern utilization mode represented by indirect utilization (gasification) arises at the historic moment.In the field of coal chemical industry, coal gasification technology has become mature, according to the mode of raw coal into reaction furnace, can be divided into three kinds:1, with 10cm-20cm granular material feeding, namely fixed bed;2, with less than 10cm granular material feeding, namely fluidized bed;3, with 5 microns-2 millimeter powder feeding, namely entrained flow bed;With the development of modern society, the entrained flow bed gasification technology with high carbon conversion rate, single set of equipment capacity is gradually replacing old fixed bed and fluidized bed, therefore, how to grind biomass material into 5 microns-2 millimeter uniform powder through simple process, directly replace existing pulverized coal, and energy-saving and cost-reducing technical scheme simultaneously is particularly important.

[0003] CN117946761A discloses a kind of biomass upgrading preparation synthesis gas method and system, the method uses first biomass broken material is dryed, then in the presence of high temperature inert gas, dry biomass and alkali earth metal oxide are mixed, and heated to 180-300 ℃, is baked, obtains upgrading biomass powder and alkali earth metal carbonate powder;Upgrading biomass powder and alkali earth metal oxide powder are sorted and separated;Upgrading biomass powder, oxygen and water are mixed, and gasification reaction is carried out, and crude synthesis gas is prepared.It is although the technical scheme can control the particle size of upgrading biomass powder below 300 μm, but the process is complex, ton raw material consumption is high, greatly increase the cost of biomass pretreatment, and biomass energy long-period industrialization operation feasibility is low.

[0004] CN117448055A discloses a kind of methanol production line and production process with corn stalk as raw material, including biomass pretreatment water washing equipment, drying equipment, steam explosion equipment, baking equipment, biomass pellet machine etc., the technical scheme controls black particle size to 2.5-3.5mm, cannot be lower, simultaneously, biomass powder processing cost is still very high, and process is complicated, consumption is high, industrialization is difficult to realize, and long-period stable operation is very difficult to predict.

[0005] CN109097078A discloses a method for preparing biomass fuel by carbonizing crop straw. The method mentions that vacuum is required to prepare biomass fuel, and the length of the crop straw can only be controlled within 3-4 cm. There is also a belt spreading process. There is a great uncertainty in the gaps between the raw materials after spreading, which in turn affects the carbonization effect. The raw material loss rate after carbonization is 0.4 tons per 1.4 tons, which greatly increases the processing cost of biomass powder.

[0006] Based on the above-mentioned existing technology, in the process of preparing synthesis gas from biomass raw materials in the existing technology, it is still impossible to directly grind the biomass materials into uniform powder at the micron-millimeter level through simple equipment, resulting in the synthesis gas preparation route having complex processes, high consumption, low production capacity of a single set of equipment, unstable equipment operation and other technical problems that need to be solved urgently. Utility Model Content

[0007] In order to solve the above technical problems, the utility model provides a powder making device, comprising a device housing, and a powder making internal component and a rotating separation device arranged in the device housing in order from bottom to top;

[0008] A gas inlet is provided below the equipment housing, and a raw material inlet and a powder outlet are provided above the equipment housing;

[0009] A powder making circulation device is provided outside or inside the powder making internal component;

[0010] And / or a separation circulation device is provided outside or inside the rotating separation device.

[0011] Furthermore, the rotary separation device is a cylindrical structure.

[0012] Furthermore, the device housing includes a separate or integrated device shell and a device base.

[0013] Furthermore, the gas inlet is located on the device housing near the device base.

[0014] Furthermore, the number of the gas inlets is ≥1;

[0015] When the number of the gas inlets is greater than 1, the gas inlets are evenly distributed on the device housing to ensure uniformity of gas supply.

[0016] Furthermore, an air supply device is provided at the location where the gas inlet extends into the device housing, and a check structure is provided on the air supply device, which is used to prevent the raw material or powder from flowing out of the powder making device from the gas inlet.

[0017] Furthermore, the non-return structure includes oppositely arranged fan blades, which can only be opened in one direction toward the inside of the powder making device. The fan blades are rotatably connected to the air supply device. A sealing strip is provided at the junction of the oppositely arranged fan blades, and the sealing strip is used to seal the gas inlet.

[0018] When the gas enters the powder-making device from the gas, the fan blades open relatively toward the inside of the powder-making device to transport the gas. The one-way split fan blade structure cannot move toward the outside of the powder-making device, thereby ensuring the gas delivery and preventing the raw materials or powder from flowing out of the gas inlet. It also ensures that the raw materials or powder will not accumulate or stick to the gas inlet, affecting the gas delivery efficiency.

[0019] Furthermore, the raw material inlet is located below the rotary separation device and above the powder making internals.

[0020] Furthermore, the rotary separation device is close to the powder outlet above the powder making equipment.

[0021] Furthermore, the rotary separation device includes one or a combination of a fan blade separation structure, a cylindrical structure with screening through holes on the side wall, and a screen structure.

[0022] Furthermore, when the rotating separation device includes a fan blade separation structure, the rotating separation device is fixedly connected to the powder making device, and the rotating separation device also includes a rotating central axis. The fan blade separation structure includes a plurality of fan blades evenly arranged around the rotating central axis, and the angle α1 between the fan blades and the rotating central axis is ≤90°.

[0023] Furthermore, the fan blade separation structure is provided with multiple layers of fan blades, and the projected area of ​​the fan blades decreases from the side close to the powder making internal component to the powder outlet side.

[0024] Furthermore, when the side wall of the rotary separation device comprises a cylindrical structure with screening through holes, the rotary separation device is movably connected to the powder making device, and the rotary separation device is a rotatable device.

[0025] Furthermore, when the rotary screening device includes a screen structure, the rotary separation device is movably connected to the powder making device, the rotary separation device is a rotatable device, and the angle α2 between the outer wall of the screen structure and the horizontal line is ≥60°, and the angle α3 between the inner wall and the horizontal line is ≥50°.

[0026] Furthermore, a wear-resistant liner is provided on the inner wall of the equipment housing, and the wear-resistant liner is used to ensure the efficient and stable operation of the powder making equipment and ensure that the powder making particle size meets the requirements.

[0027] Furthermore, the wear-resistant lining is located at the outer edge of the powder-making internal component close to the equipment housing.

[0028] Furthermore, a leak-proof lining is provided at the position where the rotating separation device contacts the inner wall of the equipment housing, which is used to prevent the powder from being directly sent out of the powder making device without being screened by the rotating separation device, thereby ensuring that the powder screened by the powder making device has a uniform particle size.

[0029] Furthermore, the structure of the powder making equipment is cylindrical.

[0030] Furthermore, the flour-making equipment is arranged to be placed vertically or horizontally.

[0031] The utility model also provides a powder making unit, which comprises the above-mentioned powder making equipment, and also comprises powder making gas-solid separation equipment and a filtering device.

[0032] Furthermore, a powder conveying pipeline is provided between the powder making equipment and the powder making gas-solid separation equipment. The powder conveying pipeline is in an inverted "L" shape. The powder conveying pipeline is located above the powder making equipment and is connected to the powder outlet of the powder making equipment. It is used to convey the powder mixed with gas to the powder making gas-solid separation equipment for gas-solid separation.

[0033] Furthermore, the pulverizing gas-solid separation equipment includes a pulverizing gas-solid separation collecting cone for collecting the powder separated in the pulverizing gas-solid separation equipment, and the angle β1 between the pulverizing gas-solid separation collecting cone and the horizontal is ≥60°.

[0034] Furthermore, the filtering device includes but is not limited to a bag filter.

[0035] Furthermore, the filtering device includes a filtering material collecting cone for collecting the powder separated in the filtering device, and the angle β2 between the filtering material collecting cone and the horizontal is ≥60°.

[0036] Furthermore, the raw materials are prepared into powder in the powder making equipment, and the powder sent out from the powder making equipment is subjected to the first gas-solid separation in the powder making equipment, wherein the powder making gas-solid separation equipment collects the powder sent out from the powder making equipment with a mass percentage ≥95%, and the remaining powder is sent to the filtering device through the action of the gas flow, and the remaining powder is separated, and the powder separated by the powder gas-solid separation equipment and the filtering device is collected by the powder making gas-solid separation collecting cone and the filtering collecting cone.

[0037] Furthermore, the powder making gas-solid separation collecting cone and the filtering collecting cone are provided with a powder unit discharge port for sending the collected powder out of the powder making unit.

[0038] Further, the powder preparation unit is further provided with a cooling tank connected with the powder preparation device for providing cooling medium for the powder preparation device.

[0039] Further, the powder preparation unit further comprises a circulating fan connected with the filtering device and the powder preparation device for receiving the gas sent from the filtering device and circulating the gas back to the powder preparation device for recycling the gas.

[0040] Further, the circulating fan is connected with the powder preparation device through a gas circulating pipeline.

[0041] Further, the gas circulating pipeline comprises a venting pipeline provided with a venting regulating valve for balancing the moisture and heat in the powder preparation unit or changing the venting amount by adjusting the opening degree of the venting regulating valve.

[0042] Further, the gas circulating pipeline is connected with the gas inlet in the powder preparation device or the equipment shell in the powder preparation device.

[0043] The utility model also provides a system for preparing synthesis gas by taking biomass as raw material, the system comprises a biomass raw material pre-crushing unit, the above-mentioned powder preparation unit, a powder conveying unit and a powder gasification unit in sequence according to the movement of raw material.

[0044] Further, the biomass raw material pre-crushing unit comprises a crushing device.

[0045] Further, the biomass raw material pre-crushing unit further comprises an induced draft fan and a first gas-solid separation device.

[0046] The induced draft fan and the first gas-solid separation device are used for reducing the pollution caused by the dust generated by the crushing device when crushing the biomass raw material to the environment.

[0047] Further, the crushing device is connected with a feeding device, and the feeding device is used for conveying the raw material to the biomass raw material pre-crushing unit for crushing.

[0048] Further, the crushing device obtains crushed materials with a particle size of less than or equal to 1.5 cm.

[0049] Further, the induced draft fan comprises a gas inlet, and the gas enters the induced draft fan and is mixed with the crushed materials obtained by the crushing device, and then enters the first gas-solid separation device for gas-solid separation.

[0050] Furthermore, the separated gas can be circulated back into the induced draft fan to continue to be mixed with the crushed material for the next time.

[0051] Furthermore, the gas in the biomass raw material pre-crushing unit is air, inert gas, or any gas that can be mixed with the crushed material.

[0052] Furthermore, the biomass raw material pre-crushing unit also includes a dust removal device connected to the first gas-solid separation device, and the dust removal device is connected to the exhaust port to remove dust contained in the gas discharged from the first gas-solid separation device to reduce environmental pollution.

[0053] Furthermore, the powder material conveying unit includes a normal pressure tank, a variable pressure tank, and a high pressure tank in order from top to bottom according to the direction of the raw materials;

[0054] Wherein, a first shut-off valve is provided between the atmospheric pressure tank and the pressure-transforming tank, and a second shut-off valve is provided between the pressure-transforming tank and the high-pressure tank.

[0055] Furthermore, the first shut-off valve is kept closed, and the raw materials sent from the previous unit first enter the atmospheric pressure tank for storage. When the raw materials in the pressure-transformer tank are emptied, the second shut-off valve is closed, and the pressure is released through the pressure relief pipeline. When the pressure is equal to that of the atmospheric pressure tank, the first shut-off valve is opened, and the raw materials in the atmospheric pressure tank enter the pressure-transformer tank. When the pressure-transformer tank is full of raw materials, the first shut-off valve is closed, and inert gas is charged into the pressure-transformer tank through the pressure charging pipeline. When the pressure in the pressure-transformer tank is equal to that in the high-pressure tank, the second shut-off valve is opened, and the raw materials in the pressure-transformer tank enter the high-pressure tank.

[0056] Furthermore, a delivery pipeline is provided between the high-pressure tank and the gasification unit, and a flow regulating valve is provided on the delivery pipeline;

[0057] Furthermore, the powder conveying unit is further provided with a pressure relief filter, which is connected to the pressure transformer tank via a pressure relief pipeline and is used to receive gas discharged from the pressure transformer tank and / or the high-pressure tank.

[0058] Furthermore, the inert gas charged into the transformer tank through the pressure charging pipeline is CO2 or N2.

[0059] Furthermore, the gasification unit includes a gasification reactor.

[0060] Furthermore, the gasification reactor is an entrained flow gasification reactor.

[0061] Furthermore, the particle size of the raw material entering the gasification unit is ≤2 mm.

[0062] Furthermore, a granulation unit and / or a drying unit is included between the biomass raw material pre-crushing unit and the pulverizing unit.

[0063] Furthermore, the granulation unit includes a granulation device or a briquetting device, and the raw materials sent from the previous unit to the granulation unit are compressed by the granulation device or the briquetting device to obtain granular materials or block materials.

[0064] Furthermore, the granulation equipment or briquetting equipment includes but is not limited to a ring-type granulation equipment and a flat-type granulation equipment, and can realize the function of compressing the raw materials into granules or briquetting.

[0065] Furthermore, the volume of the granular material or block material is ≤20cm 3 .

[0066] Furthermore, the shapes of the granular or block materials include cylindrical, rectangular, cube, and irregular granular shapes.

[0067] Furthermore, the drying unit includes a device capable of achieving a heating function.

[0068] Furthermore, the raw materials from the previous unit enter the drying unit for drying to obtain dried materials.

[0069] Furthermore, the drying method of the drying equipment includes but is not limited to fuel gas heating, steam heating or electric heating.

[0070] Furthermore, the raw materials are transported between the units by gravity flow in pipelines or by screw conveyors or bucket elevators.

[0071] The beneficial effects of the present invention are:

[0072] 1. The present invention creatively transforms a pulverizing device in a synthesis gas production system, comprising an equipment housing, and pulverizing internal components and a rotary separation device disposed in the equipment housing in ascending order from bottom to top; a gas inlet is disposed at the bottom of the equipment housing, and a raw material inlet and a powder outlet are disposed at the top of the equipment housing; a pulverizing circulation device is disposed outside or inside the pulverizing internal components; and / or a separation circulation device is disposed outside or inside the rotary separation device;

[0073] The rotating separating device comprises one or several combined structures of a fan blade separating structure, a sidewall containing a cylindrical structure with screening through holes, and a screen structure; through the specific structure design, the powder with a particle size of less than 2 mm can be obtained by the powder making equipment; when the powder making equipment is applied to a system for preparing synthesis gas, through the close cooperation of the specific structures of the specific equipment in each unit in the system and the specific equipment in each unit, the device and system for preparing synthesis gas are obtained, high efficiency and uniform particle size of the prepared powder can be obtained, and carbonization is not needed; compared with the device or production system of carbonization first and then powder making in the prior art, the device and system for preparing raw materials can save 189 yuan / ton of cost and 49 yuan / ton of power in the rough breaking, granulating and powder making stages, according to 20 tons / hour of raw materials;

[0074] Meanwhile, the device and production system of carbonization first and then powder making in the prior art also produces by-product wood vinegar, and the by-product wood vinegar needs to be processed and purified for many times to reach the quality for industrial sale, which not only reduces the synthesis gas production capacity per ton of raw materials, but also needs to increase the investment of the purification and separation production line; the powder making equipment and system have no loss of raw materials, and the ground raw materials all enter the gasification unit to generate synthesis gas;

[0075] 2、The device and system for preparing synthesis gas are novel, and can also meet the generally applied gas flow bed type gasification reaction furnace in the prior art under the premise of creativity, and production cost and industrial line popularization are reduced again; therefore, the system for preparing synthesis gas from biomass as raw materials has the characteristics of stable equipment operation and long equipment service life;

[0076] 3、The powder making equipment is also provided with a powder making circulating device and / or a separating circulating device, which is used for introducing a cooling medium, transferring and reducing the heat generated in the working process, prolonging the service life, preventing the broken powder from agglomerating or bonding again in the high temperature environment, making the raw materials pass through the rotating separating device quickly and smoothly in the first time of obtaining powder, or preventing the powder from being accumulated on the powder making inner part and the rotating separating device due to too low particle size, and affecting the powder making efficiency;

[0077] 4、According to the powder making equipment, the powder making unit comprising the powder making equipment, and the system for preparing synthesis gas as a whole, the gas or water used can be recycled due to the specific combination and cooperation of the equipment, the waste of the circulating medium is greatly reduced, and the production cost is saved again;

[0078] 5. The pulverizing equipment of the present invention can fully meet the particle size requirements of existing entrained-bed biomass raw materials, and the production capacity of the pulverizing equipment can reach 10-20 t / h. The air supply device is provided with a non-return structure, which is used to prevent the raw material or powder from flowing out of the pulverizing device through the gas inlet; the non-return structure includes oppositely arranged blades, which can only be opened in one direction toward the inside of the pulverizing device. The blades are rotatably connected to the air supply device, and a sealing strip is provided at the junction of the oppositely arranged blades, which is used to seal the gas inlet.

[0079] When the gas enters the powder making device, the fan blades are relatively opened toward the inside of the powder making device to convey the gas. The fan blade structure set in a one-way direction cannot move toward the outside of the powder making device, thereby ensuring the gas supply while preventing the raw material or powder from flowing out of the gas inlet, and also ensuring that the raw material or powder will not accumulate or stick to the gas inlet to affect the gas supply efficiency;

[0080] 6. The system of the present invention uses biomass as raw material to prepare synthesis gas, and finally obtains a crude synthesis gas with carbon monoxide and hydrogen as effective gases. The volume component of the effective gas in the crude synthesis gas is 50-90%, and the carbon conversion rate is greater than or equal to 99%. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] Figure 1 This is a structural schematic diagram of the rotary separation device including a screen structure in the powder making equipment in an embodiment of the present utility model;

[0082] Figure 2 This is a structural diagram of the non-return structure in an embodiment of the utility model;

[0083] Figure 3 This is a schematic structural diagram of a powder making unit in an embodiment of the present utility model;

[0084] Figure 4 This is a schematic flow diagram of a system for preparing synthesis gas using biomass as raw material in Example 3 of the present utility model;

[0085] Figure 5 This is a schematic structural diagram of a biomass raw material pre-crushing unit in an embodiment of the present utility model;

[0086] Figure 6 This is a schematic structural diagram of a powder delivery unit in an embodiment of the present utility model;

[0087] Figure 7 This is a schematic flow diagram of a system for preparing synthesis gas using biomass as raw material in Example 4 of the present utility model;

[0088] Figure 8This is a structural schematic diagram of the rotary separation device including the fan blade separation structure in the powder making equipment in an embodiment of the present utility model;

[0089] Figure 9 This is a structural diagram of the rotary separation device in the powder making equipment according to an embodiment of the present utility model, which includes a cylindrical structure with screening holes;

[0090] The names of the labels in the figure are:

[0091] A. Biomass raw material pre-crushing unit; B. Pulverizing unit; C. Powder conveying unit; D. Powder gasification unit; E. Granulating unit; F. Drying unit;

[0092] 1. Pulverizing equipment; 101. Pulverizing internals; 102. Rotary separation device; 103. Gas inlet; 1031. Fan blades; 104. Raw material inlet; 105. Powder outlet; 106. Equipment housing; 107. Equipment base; 108. Wear-resistant bushing; 2. Pulverizing gas-solid separation equipment; 3. Filter device; 4. Powder conveying pipeline; 5. Circulating fan; 6. Gas circulation pipeline; 601. Vent pipeline; 602. Vent regulating valve; 7. Crushing equipment; 8. Induced draft fan; 9. First gas-solid separation equipment; 10. Dust removal equipment; 11. Atmospheric pressure tank; 12. Pressure transformer tank; 13. High-pressure tank; 14. First shut-off valve; 15. Second shut-off valve; 16. Pressure relief line; 17. Pressurization line; 18. Flow regulating valve; 19. Pressure relief filter; DETAILED DESCRIPTION

[0093] Example 1

[0094] like Figure 1 As shown, this embodiment provides a powder making device 1, comprising a device housing, and a powder making internal component 101 and a rotating separation device 102 arranged in the device housing in order from bottom to top;

[0095] A gas inlet 103 is provided below the device housing, and a raw material inlet 104 and a powder outlet 105 are provided above the device housing;

[0096] A powder making circulation device is provided outside or inside the powder making internal part 101;

[0097] A separation circulation device is provided outside or inside the rotating separation device 102 .

[0098] The rotating separation device 102 is a cylindrical structure.

[0099] Cooling medium is passed through the powder making circulation device and the separation circulation device.

[0100] In this embodiment, the cooling medium is cooling gas with a gas volume of 100 Nm 3 / h.

[0101] In some embodiments, the cooling liquid includes but is not limited to cooling water and cooling organic matter. The cooling medium can be any cooling medium that can achieve temperature reduction and is not limited in the present invention.

[0102] In this embodiment, the device housing includes a separate device shell 106 and a device base 107 .

[0103] The gas inlet 103 is located on the device housing 106 near the device base 107 .

[0104] In this embodiment, the number of the gas inlet is 1;

[0105] In some embodiments, when the number of the gas inlets is greater than 1, the gas inlets are evenly distributed on the device housing to ensure uniformity of gas supply.

[0106] An air supply device is provided at the location where the gas inlet 103 extends into the device housing 106 . A check structure is provided on the air supply device to prevent the raw material or powder from flowing out of the pulverizing device from the gas inlet.

[0107] like Figure 2 As shown, in some embodiments, the non-return structure includes oppositely arranged fan blades 1031, which can only be opened in one direction toward the inside of the powder making device. The fan blades 1031 are rotatably connected to the air supply device. A sealing strip is provided at the junction of the oppositely arranged fan blades 1031, which is used to seal the gas inlet 103. The fan blades 1031 are mutually coupled when closed;

[0108] When the gas enters the powder making device from the gas, the fan blades 1031 open relatively toward the powder making device to transport the gas. The one-way fan blade structure cannot move toward the outside of the powder making device, thereby ensuring the gas delivery and preventing the raw materials or powder from flowing out of the gas inlet 103. It also ensures that the raw materials or powder will not accumulate or stick to the gas inlet 103, affecting the gas delivery efficiency.

[0109] The raw material inlet 104 is located below the rotating separation device 102 and above the powder making internals 101 .

[0110] The rotating separation device 102 is close to the powder outlet 105 above the powder making equipment.

[0111] like Figure 1As shown, in this embodiment, the rotating separation device 102 includes a screen structure with a "W"-shaped cross-section. The rotating separation device 102 is movably connected to the powder making device 1 and is a rotatable device.

[0112] The "W"-shaped cross-section design helps increase the fluidity of powder during the screening process. Due to the change in cross-section, the powder may experience more direction changes and mixing during the screening process, which helps the powder to be more evenly distributed on the screen structure and improve screening efficiency.

[0113] The change in cross section may cause the powder to form more obvious stratification during the screening process. Large particles are more likely to be pushed to the edge or lower layer of the screen structure, while small particles are more likely to pass through the screen structure, achieving better screening effect.

[0114] The included angle α2 between the outer side wall of the screen structure and the horizontal line is 90°, and the included angle α3 between the inner side wall and the horizontal line is 45°.

[0115] A wear-resistant liner 108 is provided on the inner wall of the equipment housing 106 , and the wear-resistant liner 108 is used to ensure the efficient and stable operation of the powder making equipment 1 and ensure that the powder making particle size meets the requirements.

[0116] In this embodiment, the wear-resistant liner 108 is located at the outer edge of the powder-making internal component 107 close to the equipment housing 106 .

[0117] A leak-proof lining is provided at the position where the rotating separation device 102 contacts the inner wall of the equipment housing 106 to prevent the powder from being directly sent out of the powder making device without being screened by the screen structure, thereby ensuring that the powder screened by the powder making device has a uniform particle size.

[0118] The powder making equipment is arranged to be placed vertically. In some embodiments, the powder making equipment is arranged to be placed horizontally.

[0119] Through the cooperation between the rotating separation device 102 and the screen structure, the powder making equipment obtains powder with a particle size of ≤2 mm after grinding.

[0120] The rotary separation device 102 changes the screening air volume by adjusting the rotation speed, thereby changing the particle size distribution of the powder leaving the powder making equipment.

[0121] The equipment housing, wear-resistant lining 108, powder-making internals 101, and rotating separation device 102 are made of wear-resistant materials, which include but are not limited to cemented carbide and tungsten carbide; or wear-resistant materials are sprayed or welded on the inner wall of the powder-making equipment to increase the service life of the powder-making equipment.

[0122] Specifically, the raw material enters the device housing from the raw material inlet 104 and comes into contact and collision with the rotating pulverizing internal component 102. The pulverizing internal component 102 crushes the raw material. At the same time, gas enters the device housing from the gas inlet 103, blowing the crushed powder upward to contact the rotating separation device 102. The powder that passes through the separation structure on the rotating separation device 102 is sent out of the pulverizing device 1 from the powder outlet 105. The powder that does not pass through the separation structure on the rotating separation device 102 continues to come into contact and collision with the pulverizing internal component 101 in the device housing until it can pass through the screen structure on the rotating separation device 102.

[0123] During the operation of the powder-making internal component 101 and the rotary separation device 102, a cooling medium is introduced into the powder-making circulation device and the separation circulation device to transfer and reduce the heat generated during their operation, thereby extending their service life or preventing the crushed powder from agglomerating or sticking again in an elevated temperature environment, so that the raw materials can pass through the rotary separation device 102 quickly and smoothly as soon as they are crushed to obtain powder, thereby preventing the powder from accumulating on the powder-making internal component 101 and the rotary separation device 102 due to its too low particle size, thereby affecting the powder-making efficiency.

[0124] In some embodiments, as Figure 8 As shown, when the rotating separation device 102 includes a fan blade separation structure, the rotating separation device 102 is fixedly connected to the powder making device 1, and the rotating separation device 102 also includes a rotating central axis. The fan blade separation structure includes a plurality of fan blades evenly arranged around the rotating central axis, and the angle α1 between the fan blades and the rotating central axis is 80°. In some embodiments, the fan blade separation structure may also be provided with multiple layers of fan blades, and the projected area of ​​the fan blades decreases from the side close to the powder making internal component 101 to the side close to the powder outlet 105.

[0125] The rotating separation device 102 is a cylindrical structure that is connected from top to bottom.

[0126] In some embodiments, as Figure 9 As shown, when the side wall of the rotating separation device 102 includes a cylindrical structure of screening holes, the rotating separation device 102 is movably connected to the powder making device 1, the rotating separation device 102 is a rotatable device, and the screening holes are rectangular screening holes. In some embodiments, the structure of the screening holes can also be circular or irregular.

[0127] The rotating separation device 102 is a cylindrical structure with a closed lower end and an open upper end and side walls.

[0128] Example 2

[0129] like Figure 3 As shown, this embodiment provides a powder making unit B, which includes the powder making equipment 1 in Example 1, and also includes a powder making gas-solid separation device 2 and a filtering device 3.

[0130] A powder conveying pipeline 4 is provided between the powder making equipment 1 and the powder making gas-solid separation equipment 2. The powder conveying pipeline 4 is in an inverted "L" shape. The powder conveying pipeline 4 is located above the powder making equipment 1 and is connected to the powder outlet 105 of the powder making equipment 1. It is used to convey the powder mixed with gas to the powder making gas-solid separation equipment 2 for gas-solid separation.

[0131] The pulverizing gas-solid separation equipment 2 includes a pulverizing gas-solid separation collecting cone for collecting the powder separated in the pulverizing gas-solid separation equipment. The angle β1 between the pulverizing gas-solid separation collecting cone and the horizontal is 70°.

[0132] In this embodiment, the filtering device 3 is a bag filter.

[0133] The filtering device 3 includes a filter collecting cone for collecting the powder separated in the filtering device 3 , and the angle β2 between the filter collecting cone and the horizontal is 60°.

[0134] Specifically, in this embodiment, the raw material is prepared into powder in the powder making equipment 1, and the powder sent out from the powder making equipment 1 is subjected to the first gas-solid separation in the powder making gas-solid separation equipment 2, wherein the powder making gas-solid separation equipment 2 collects 95% of the mass percentage of the powder sent out from the powder making equipment 1, and the remaining powder is sent to the filter device 3 through the action of the gas flow, and the remaining powder is separated, and the powder separated by the powder gas-solid separation equipment 2 and the filter device 3 is collected by the powder making gas-solid separation collecting cone and the filter collecting cone.

[0135] The powder making gas-solid separation collecting cone and the filtering collecting cone are provided with a powder unit discharge port for sending the collected powder out of the powder making unit B.

[0136] The powder making unit B is further provided with a cooling tank, which is connected to the powder making equipment 1 and is used to provide a cooling medium for the powder making equipment 1;

[0137] The pulverizing unit B further includes a circulating fan 5, which is connected to the filtering device 3 and the pulverizing equipment 1, and is used to receive the gas sent from the filtering device 3 and circulate the gas back to the pulverizing device 1 to achieve the recycling of the gas.

[0138] The circulating fan 5 is connected to the powder making equipment 1 via a gas circulation pipeline 6 .

[0139] The gas circulation pipeline 6 includes a venting pipeline 601 , and a venting regulating valve 602 is provided on the venting pipeline 601 to balance the moisture and heat in the powder making unit B or change the venting amount by adjusting the opening of the venting regulating valve 602 .

[0140] In some embodiments, the gas circulation pipeline 6 is connected to the gas inlet 103 in the powder making equipment 1 . In this embodiment, the gas circulation pipeline 6 is connected to the equipment housing in the powder making equipment 1 .

[0141] Example 3

[0142] like Figure 4 As shown, this embodiment provides a system for preparing synthesis gas using biomass as raw material. The overall system is a "one-step" method for preparing synthesis gas. The system includes a biomass raw material pre-crushing unit A, a powder making unit B in Example 2, a powder conveying unit C, and a powder gasification unit D in accordance with the direction of the raw material.

[0143] In this embodiment, the raw material is a biomass raw material; the moisture content of the biomass raw material is 15 wt%.

[0144] In this embodiment, the biomass raw materials are solid organic waste materials, including but not limited to trees and logging residues, straw and agricultural residues, urban garbage, and human and animal feces.

[0145] like Figure 5 As shown, the biomass raw material pre-crushing unit A includes a crushing device 7.

[0146] The biomass raw material pre-crushing unit A further includes an induced draft fan 8 and a first gas-solid separation device 9;

[0147] The induced draft fan 8 and the first gas-solid separation device 9 are used to reduce the pollution to the environment caused by dust generated by the crushing equipment 1 when crushing the biomass raw materials.

[0148] The crushing device 7 is connected to a feeding device, and the feeding device is used to transport the raw materials to the biomass raw material pre-crushing unit for crushing.

[0149] In this embodiment, the crushing equipment only needs to be able to obtain crushed materials with a particle size of ≤1.5 cm.

[0150] The induced draft fan 8 includes a gas inlet. The gas enters the induced draft fan 8, mixes with the crushed material obtained by the crushing equipment 7, and enters the first gas-solid separation equipment 9 together for gas-solid separation. The crushed material obtained after separation is sent from the raw material outlet of the first gas-solid separation equipment 9 to the next unit for subsequent processing. The separated gas obtained after separation is discharged from the exhaust port of the first gas-solid separation equipment 9.

[0151] The separated gas can be circulated back into the induced draft fan 8 to continue to be mixed with the crushed material for the next time.

[0152] In this embodiment, the gas in the biomass raw material pre-crushing unit is air. In some embodiments, the gas is an inert gas or any gas that can be mixed with the crushed material.

[0153] The biomass raw material pre-crushing unit A further includes a dust removal device 10 connected to the first gas-solid separation device 9. The dust removal device 10 is connected to the exhaust port to remove dust contained in the gas discharged from the first gas-solid separation device 9 to reduce environmental pollution.

[0154] like Figure 6 As shown, the powder conveying unit C is specifically provided with a normal pressure tank 11, a variable pressure tank 12, and a high pressure tank 13 in order from top to bottom according to the direction of the raw materials;

[0155] A first shut-off valve 14 is provided between the atmospheric pressure tank 11 and the pressure-transforming tank 12 , and a second shut-off valve 15 is provided between the pressure-transforming tank 12 and the high-pressure tank 13 .

[0156] Specifically, in this embodiment, the first shut-off valve 14 is kept closed, and the raw materials sent from the previous unit first enter the atmospheric pressure tank 11 for storage. When the raw materials in the transformer tank 12 are emptied, the second shut-off valve 15 is closed, and the pressure is released through the pressure relief line 16. When the pressure is equal to that of the atmospheric pressure tank 11, the first shut-off valve 14 is opened, and the raw materials in the atmospheric pressure tank 11 enter the transformer tank 12. When the transformer tank 12 is full of raw materials, the first shut-off valve 14 is closed, and inert gas is charged into the transformer tank 12 through the pressure charging line 17, so that the pressure in the transformer tank 12 becomes 5MPag. When the pressure in the transformer tank 12 is equal to the pressure in the high-pressure tank 13, the second shut-off valve 15 is opened, and the raw materials in the transformer tank 12 enter the high-pressure tank 13. The pressure in the high-pressure tank 13 is 5Mpag.

[0157] At this time, the pressure difference between the pressure in the high-pressure tank 13 and the operating pressure of the gasification unit D is 0.5 MPag. A delivery pipeline is provided between the high-pressure tank 13 and the gasification unit D. A flow regulating valve 18 is provided on the delivery pipeline. The delivery density of the delivery pipeline is set to 200 kg / m 3 ,

[0158] In this embodiment, the powder conveying unit C is further provided with a pressure relief filter 19 , which is connected to the pressure transformer tank 12 via a pressure relief line 16 and is used to receive gas released from the pressure transformer tank 12 and the high-pressure tank 13 .

[0159] In this embodiment, the inert gas charged into the transformer tank through the charging pipeline 17 is CO2. In some embodiments, the inert gas is N2.

[0160] In this embodiment, the gasification unit D includes a gasification reactor.

[0161] The particle size of the raw material entering the gasification unit is ≤2mm; the operating conditions of the gasification reactor are: the operating conditions of a conventional gasification reactor, oxygen-deficient combustion, and the furnace operating pressure of the gasification reactor is 3MPag.

[0162] In this example, the above system generated a crude synthesis gas containing carbon monoxide and hydrogen as active gases, with the active gases comprising 89% by volume. The carbon conversion rate was 99.6%. The synthesis gas produced in this example carried no water or ash downstream, exhibiting excellent water quality and enabling long-term stable system operation.

[0163] Example 4

[0164] like Figure 7 As shown, based on Example 3, a granulation unit E and a drying unit F are included between the biomass raw material pre-crushing unit A and the pulverizing unit B.

[0165] In this embodiment, the granulation unit E includes a granulation device. In some embodiments, the granulation unit E includes a briquetting device. The raw materials sent from the previous unit to the granulation unit E are compressed by the granulation device or the briquetting device to obtain granular materials or block materials.

[0166] The granulation equipment is a ring-type granulation equipment. In some embodiments, it is a flat-type granulation equipment, which can realize the function of compressing the raw materials into granules or briquette.

[0167] In this embodiment, the compression ratio of the granulation device or briquetting device is 10-20; the compression ratio is the value of the effective thickness divided by the pore diameter.

[0168] In some embodiments, the relationship between the compression ratio, ton consumption and bulk density is shown in Table 1:

[0169]

[0170] In this embodiment, the volume of the granular material or block material is controlled to be 5-20cm 3 between.

[0171] In this embodiment, the granular material is cylindrical. In some embodiments, the granular material is in the shape of a cuboid, a cube, or irregular granules.

[0172] The drying unit F includes a heating device, the heating temperature of the heating device is 200°C, and the outlet temperature of the heating device is 55°C.

[0173] The raw materials from the previous unit enter the drying unit for drying to obtain dried materials, and the moisture content of the dried materials is 7-8 wt%.

[0174] The drying method of the drying equipment includes but is not limited to fuel gas heating, steam heating or electric heating.

[0175] The transportation of raw materials between the units is achieved by gravity flow in pipelines, screw conveyors or bucket elevators.

[0176] In this embodiment, a crude synthesis gas containing carbon monoxide and hydrogen as effective gases is generated. The volume composition of the effective gases in the crude synthesis gas is 89%, and the carbon conversion rate is 99.6%.

[0177] Comparative Example 1

[0178] The existing production line, including a carbonization unit as disclosed in CN109097078A, produces syngas in a two-step process, first carbonizing and then pulverizing. This produces a crude syngas containing carbon monoxide and hydrogen as active gases. The active gases account for 81% by volume, and the carbon conversion rate is 97.5%.

[0179] Cost calculation for preparing biomass powder using the systems involved in the Examples and Comparative Examples:

[0180] The cost calculation table of Example 4 is shown in Table 2:

[0181] Table 2 Cost calculation table of Example 4

[0182]

[0183] The cost calculation table of comparative example 1 is shown in Table 2:

[0184] Table 3 Cost calculation table for comparative example 1

[0185]

[0186] The above tons of products are biomass powder.

[0187] As can be seen, the pulverizing equipment of the present invention, and the system for producing syngas from biomass using the equipment, can achieve the beneficial effects of high syngas production efficiency, uniform powder particle size, and no need for a carbonization device. Compared with existing equipment or production systems that first carbonize and then pulverize, based on a 20-ton / hour feedstock flow, the system of the present invention can save 189 yuan / ton in costs and 49 yuan / ton in electricity during the raw material crushing, granulation, and pulverization stages.

[0188] In addition, the devices or production systems of the prior art also involve the by-product wood vinegar, which needs to be processed and purified multiple times to reach the quality of industrial sales. This not only reduces the production capacity of tons of raw material synthesis gas, but also requires increased investment in purification and separation production lines; the system of the utility model has no raw material loss in the deformed powder production, and all the ground raw materials enter the gasification unit to produce synthesis gas.

[0189] It should be understood that the present invention is not limited to the contents described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A flour making device, characterized in that: It comprises an equipment housing, and a powder making internal component (101) and a rotary separation device (102) arranged in the equipment housing in order from bottom to top; A gas inlet (103) is provided below the device housing, and a raw material inlet (104) and a powder outlet (105) are provided above the device housing. A powder making circulation device is provided outside or inside the powder making internal part (101); And / or a separation circulation device is provided outside or inside the rotating separation device (102).

2. The powder making equipment according to claim 1, characterized in that: The device housing comprises a separate or integrated device shell (106) and a device base (107).

3. The powder making equipment according to claim 1, characterized in that: The rotary separation device comprises a fan blade separation structure, a cylindrical structure with screening through holes on the side wall, and a screen structure, or a combination of several structures.

4. A flour milling unit, characterized in that: The pulverizing unit comprises the pulverizing equipment (1) according to any one of claims 1 to 3, and further comprises pulverizing gas-solid separation equipment (2) and a filtering device (3).

5. The flour making unit according to claim 4, characterized in that: The pulverizing gas-solid separation equipment (2) comprises a pulverizing gas-solid separation collecting cone, wherein the angle β1 between the pulverizing gas-solid separation collecting cone and the horizontal is ≥60°.

6. The flour making unit according to claim 4, characterized in that: The filtering device (3) comprises a filtering material collecting cone, wherein the angle β2 between the filtering material collecting cone and the horizontal is ≥60°.

7. A system for producing synthesis gas using biomass as raw material, characterized in that: The system comprises, in order according to the direction of the raw materials, a biomass raw material pre-crushing unit, a pulverizing unit according to any one of claims 4 to 6, a powder conveying unit, and a powder gasification unit.

8. The system for preparing synthesis gas using biomass as raw material according to claim 7, characterized in that: The biomass raw material pre-crushing unit comprises a crushing device (7).

9. The system for producing synthesis gas using biomass as raw material according to claim 7, characterized in that: The powder material conveying unit comprises, from top to bottom, a normal pressure tank (11), a variable pressure tank (12), and a high pressure tank (13) according to the direction of the raw materials; The gasification unit includes a gasification reactor.

10. The system for preparing synthesis gas using biomass as raw material according to claim 7, characterized in that: A granulation unit and / or a drying unit is included between the biomass raw material pre-crushing unit and the pulverizing unit; The granulation unit includes a granulation device or a briquetting device; The drying unit includes a heating device.

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