Integrated biomass carbonization powder making device and method

Abstract

The invention discloses an integrated biomass carbonization powder making device and method, and the device comprises a raw material storage bin which is connected with a hopper and conveys a biomass material to an exhaust gas heat recovery bin through the hopper; the exhaust gas heat recovery bin is used for heating the biomass material through exhaust gas and then conveying the biomass material to the carbonization and powder preparation integrated equipment; according to the carbonization and powder preparation integrated equipment, biomass materials are ground and heated through a coal mill, the materials with the granularity meeting the first condition are conveyed to a baking pipe through hot air and baked in the baking pipe, and the baked powder meeting the second condition is conveyed to a filter through hot air; the filter conveys the filtered powder to the gasification furnace through conveying equipment, and the filtered gas is output to the exhaust gas heat recovery bin and the inert gas generator through a gas circulating pipeline; the inert gas generator is connected with the carbonization and powder preparation integrated equipment and outputs heated gas to the coal mill and the baking pipe.

Description

Technical Field

[0001] The present invention relates to the field of biomass technology, and in particular to an integrated biomass carbonization and pulverizing device and method. Background Art

[0002] Biomass gasification is the process of converting biomass (such as crop straw, forestry residues, etc.) into combustible gas or chemical raw materials, establishing a closed carbon cycle, and effectively utilizing the carbon in biomass waste. Producing chemical products such as methanol through biomass gasification can reduce carbon emissions from the source of the entire system, and even achieve zero-carbon chemical industry. At present, the main reactors are fixed-bed gasifiers, fluidized-bed gasifiers, and entrained-bed gasifiers. Among them, the entrained-bed gasifier can efficiently process biomass of various shapes and sizes (including powdered biomass) and has high gasification efficiency and synthesis gas quality. Using an entrained-bed pressurized gasifier to gasify biomass under high temperature and high pressure can greatly improve the biomass gasification efficiency and obtain high-conversion rate raw gas. It is the main direction for the large-scale industrial application of biomass gasification in the future.

[0003] The biomass milling process system is a key factor restricting the development of biomass entrained-flow gasification. The cellulose and hemicellulose in biomass are relatively hard, and the fibers of straw-based biomass are long and interwoven. This can lead to fiber clumps or knots in the milling equipment, which can easily lead to uneven texture, uneven size, and irregular shape of the milled particles. This results in low output from conventional milling equipment, and poor powder quality and stability.

[0004] Therefore, it is urgent to provide a new biomass milling solution. Summary of the Invention

[0005] The object of the present invention is to provide an integrated biomass carbonization and pulverization device and method to at least partially solve the above-mentioned problems of the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides an integrated biomass carbonization and pulverizing device, comprising: a raw material storage bin 1, a hopper 2, an exhaust gas heat recovery bin 10, a carbonization and pulverizing integrated device 6, a filter 3, and an inert gas generator 5; wherein

[0007] The raw material storage bin 1 is connected to the hopper 2, and the biomass material is transported to the exhaust gas heat recovery bin 10 through the hopper 2;

[0008] The exhaust gas heat recovery bin 10 heats the biomass material with the exhaust gas and then transports it to the carbonization and pulverization integrated equipment 6, outputting the exhaust gas after heat exchange;

[0009] The carbonization and pulverization integrated device 6 comprises a coal mill 61 and a baking tube 62, the coal mill 61 grinds and heats the biomass material, the material with a particle size meeting the first condition is sent to the baking tube 62 by hot air, and the baking treatment is carried out in the baking tube 62, the powder meeting the second condition after baking is sent to the filter 3 by hot air, and the powder not meeting the second condition falls back to the coal mill 61;

[0010] The filter 3 transmits the filtered powder to the gasification furnace through a conveying device, and outputs the filtered gas to the exhaust gas heat recovery bin 10 and the inert gas generator 5 through a gas circulation pipeline;

[0011] The inert gas generator 5 is connected with the carbonization and pulverization integrated device 6, and outputs the heated gas to the coal mill 61 and the baking tube 62, respectively.

[0012] Preferably, the hopper 2 comprises a vibrating hopper.

[0013] Preferably, the device further comprises a quantitative feeder 8 connected with the hopper 2 and the carbonization and pulverization integrated device 6, and the quantitative feeder 8 quantitatively outputs the biomass material from the hopper 2 to the carbonization and pulverization integrated device 6.

[0014] Preferably, the carbonization and pulverization integrated device 6 further comprises a separator 63 and a powder return pipe, the separator 63 separates the received biomass material, the powder meeting the second condition is sent to the filter 3, and the powder not meeting the second condition falls back to the coal mill 61 through the powder return pipe.

[0015] Preferably, the baking tube 62 comprises a plurality of gas inlets connected with the inert gas generator 5, respectively, and receives the gas output by the inert gas generator 5 to carry out the baking carbonization treatment on the biomass material.

[0016] Preferably, the device further comprises an exhaust gas condenser 11 connected with the exhaust gas heat recovery bin 10, and the exhaust gas condenser 11 is used for carrying out the cooling and liquefaction treatment on the gas discharged from the exhaust gas heat recovery bin 10.

[0017] Preferably, the exhaust gas condenser 11 carries out the cooling and liquefaction treatment on the received gas to obtain wood vinegar liquid, and the gas not liquefied is conveyed to the gasification furnace.

[0018] Preferably, the inert gas generator 5 further comprises a fuel gas inlet and / or a combustion-supporting gas inlet, and the fuel gas inlet and / or the combustion-supporting gas inlet are used for receiving the fuel gas and / or the combustion-supporting gas input from outside.

[0019] Preferably, the device further comprises a circulating fan 4 connected with the filter 3, and the circulating fan 4 carries out the pressurization treatment on the gas output by the filter 3.

[0020] The application also provides a method for the integrated carbonization and pulverization of biomass.

[0021] The biomass material in the raw material storage bin 1 is transported to the exhaust gas heat recovery bin 10;

[0022] The biomass material is heated by the exhaust gas in the exhaust gas heat recovery bin 10, and the heated biomass material is transported to the carbonization and pulverization integrated device 6 for carbonization treatment and pulverization treatment;

[0023] The powder obtained after the carbonization treatment and the pulverization treatment is output to the filter 3 by the circulating gas;

[0024] The filtered powder is transported to the gasification furnace, and the filtered gas is transported to the exhaust gas heat recovery bin 10 and the inert gas generator 5;

[0025] The gas is heated by the inert gas generator 5 and transported to the carbonization and pulverization integrated device 6.

[0026] Compared with the prior art, the present application has at least the following advantages:

[0027] In the embodiment of the present application, the integrated biomass carbonization and pulverization technology is adopted, the biomass enters in the form of white particles or blocky material and is directly made into powder meeting the conveying requirements of the entrained-flow bed gasification, the system is simple, the energy consumption is reduced, and the operation stability is improved; moreover, the complex components in the gas phase generated in the carbonization process are classified and utilized and disposed, the device yield is improved, and the pollution problem of the exhaust gas is solved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The structure diagram of the device for the integrated biomass carbonization and pulverization provided in the embodiment of the present application.

[0029] Figure 2 The flow diagram of the method for the integrated biomass carbonization and pulverization provided in the embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to enable the persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the persons skilled in the art without creative labor should belong to the protection scope of the present application.

[0031] It should be noted that the terms "first", "second", and the like in the description and claims of the application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so as to understand the embodiments of the application described herein. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a product or device comprising a series of units does not necessarily limit to those units clearly listed, but can include other units not clearly listed or inherent to these products or devices.

[0032] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0033] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0034] In addition, the terms "mount", "set", "provided with", "connected", "connected", "sleeved" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0036] Embodiment 1

[0037] The embodiment of the present application provides a device for integrated biomass carbonization and powder production, as shown in the figure, which comprises a raw material storage bin 1, a hopper 2, an exhaust gas heat recovery bin 10, a carbonization and powder production integrated device 6, a filter 3 and an inert gas generator 5. Figure 1

[0038] ​The raw material storage bin 1 is connected to the hopper 2, and the biomass material is transported to the exhaust gas heat recovery bin 10 through the hopper 2;

[0039] The exhaust gas heat recovery bin 10 heats the biomass material with the exhaust gas and then transports it to the carbonization and pulverization integrated equipment 6, outputting the exhaust gas after heat exchange;

[0040] The integrated carbonization and pulverizing equipment 6 includes a coal mill 61 and a baking tube 62. The coal mill 61 grinds and heats the biomass material. The material with a particle size that meets the first condition is sent to the baking tube 62 by hot air and is baked in the baking tube 62. After baking, the powder that meets the second condition is sent to the filter 3 by hot air. The powder that does not meet the second condition falls back to the coal mill 61.

[0041] The filter 3 transfers the filtered powder to the gasifier through the conveying equipment, and outputs the filtered gas to the exhaust gas heat recovery bin 10 and the inert gas generator 5 through the gas circulation pipeline;

[0042] The inert gas generator 5 is connected to the carbonization and pulverizing integrated equipment 6 and outputs heated gas to the coal mill 61 and the baking tube 62 respectively.

[0043] Wherein, in a preferred embodiment, the hopper 2 comprises a vibrating hopper. The hopper 2 can also be a common hopper, which does not include a vibration function and only realizes downward conveying of the hopper under the action of gravity.

[0044] In a preferred embodiment, the device further includes a quantitative feeder 8, which is connected to the hopper 2 and the integrated carbonization and pulverization equipment 6 and quantitatively outputs the biomass material from the hopper 2 to the integrated carbonization and pulverization equipment 6. The quantitative feeder 8 can control the feed rate of the biomass raw material to the integrated carbonization and pulverization equipment 6, thereby adjusting the pulverization efficiency in the integrated carbonization and pulverization equipment 6 and the stability of the quality of the prepared powder.

[0045] The integrated carbonization and pulverizing equipment 6 includes a separator 63 and a powder return pipe (not shown in the figure). The separator 63 separates the received biomass material. Powder that meets the second condition (such as particle size) is sent to the filter 3, and powder that does not meet the second condition enters the powder return pipe and falls back to the coal mill 61. In a preferred embodiment, the baking pipe 62 includes multiple air inlets, each of which is connected to the inert gas generator 5, and receives the gas output by the inert gas generator 5 to bake and carbonize the biomass material.

[0046] The device may further include an exhaust gas condenser 11 connected to the exhaust gas heat recovery bin 10 for cooling and liquefying the gas discharged from the exhaust gas heat recovery bin 10. The exhaust gas condenser 11 cools and liquefies the received gas to obtain wood vinegar, and transports the unliquefied gas to the gasifier.

[0047] The inert gas generator 5 further comprises a fuel gas inlet and / or a combustion-supporting gas inlet for receiving externally input fuel gas and / or combustion-supporting gas.

[0048] The device can further comprise a circulating fan 4 connected to the filter 3 for pressurizing the gas output by the filter 3.

[0049] By using the device for integrated biomass carbonization and powder production provided in the embodiments of the present application, the biomass in the form of white particles or block materials is directly made into powder meeting the conveying requirements of the gas flow bed gasification after entering the device. Compared with the mature process of first carbonizing black particles in a fixed bed and then grinding, the process flow is short, the system is simple, the investment can be saved, the energy consumption can be reduced, and the operation stability can be improved. Moreover, the proportion of particle size less than 160 microns can reach more than 90%.

[0050] By grading and utilizing and disposing the complex components in the gas phase generated in the carbonization process, the low-boiling-point components in the exhaust gas are made into high-value-added wood vinegar after being cooled, and the high-boiling-point components are sent into the gasification furnace after being compressed, so that the organic components are completely decomposed into synthesis gas (CO+H2). On the one hand, the organic components can be fully utilized to improve the yield of the device, and on the other hand, the environmental protection discharge of VOSC and the like in the exhaust gas can be completely solved.

[0051] By arranging the exhaust gas heat recovery bin 10, the heat recovery of the exhaust gas is realized. The exhaust gas at about 200 degrees Celsius is cooled by the raw materials in the exhaust gas heat recovery bin, so that the heat in the exhaust gas is fully recovered. By receiving the fuel gas and / or combustion-supporting gas in the inert gas generator 5, the fuel gas and / or combustion-supporting gas are heated by the exhaust gas received in the inert gas generator 5, so that the heat in the exhaust gas is further recovered, and the energy utilization efficiency is improved.

[0052] Embodiment 2

[0053] Based on the same technical concept as embodiment 1, the embodiments of the present application further provide a method for integrated biomass carbonization and powder production, which is applied to the device provided in embodiment 1 and any of the embodiments thereof, and refers to Figure 2 The method comprises the following steps:

[0054] In step 201, the biomass material in the raw material storage bin is transported to the exhaust gas heat recovery bin.

[0055] In step 202, the biomass material is heated by the exhaust gas in the exhaust gas heat recovery bin, and the heated biomass material is transported to the carbonization and powder production integrated device for carbonization treatment and powder production treatment.

[0056] In step 203, the powder obtained after the carbonization treatment and powder production treatment is output to the filter by the circulating gas.

[0057] Step 204, transmitting the filtered powder to the gasifier, transmitting the filtered gas to the exhaust gas heat recovery bin and the inert gas generator;

[0058] Step 205, heating the gas by the inert gas generator and transmitting the heated gas to the carbonization and powder production integrated device.

[0059] In the present application, the biomass material (white particles or block material) is sent to the raw material storage bin from the boundary area, enters the exhaust gas heat recovery bin through the vibrating hopper, after recovering the exhaust gas heat, is sent to the carbonization and powder production integrated device through the quantitative feeder for carbonization and powder production, the biomass powder with qualified particle size and moisture is sent to the filter by the circulating gas, the powder is sent to the gasifier as the gasification fuel by the downstream powder conveying device, the filtered circulating gas is pressurized by the circulating fan, most of the circulating gas is heated by the inert gas generator and then is sent to the carbonization and powder production integrated device to heat the material. Part of the circulating gas is extracted, cooled by the biomass raw material in the exhaust gas heat recovery bin, condensed by the exhaust gas condenser, and the liquid phase is sold as wood vinegar liquid, and the gas phase is pressurized by the exhaust gas compressor and then is sent to the gasifier to completely decompose the organic matter in the gas phase.

[0060] The specific implementation of each step can refer to the specific description in Embodiment 1, and the present embodiment will not be repeated here.

[0061] By adopting the integrated biomass carbonization and powder production method provided in the present embodiment, the biomass enters in the form of white particles or block material and is directly produced into powder meeting the conveying requirements of the entrained-flow bed gasification, compared with the mature process of carbonizing black particles in the fixed bed and then grinding, the process flow is short, the system is simple, the investment can be saved, the energy consumption is reduced, the operation stability is improved, and the particle size less than 160 microns accounts for more than 90%.

[0062] By grading utilization and disposal of the complex components in the gas phase generated in the carbonization process, the low-boiling-point components in the exhaust gas are cooled to produce high-value-added wood vinegar liquid, and the high-boiling-point components are compressed and sent to the gasifier to completely decompose the organic components into synthesis gas (CO+H2), which can fully utilize the organic components and improve the device yield, and can completely solve the environmental protection discharge of VOSC and the like in the exhaust gas.

[0063] The exhaust gas heat recovery bin 10 is used to recover the heat of the exhaust gas, and the exhaust gas at about 200 degrees Celsius is cooled by the raw material in the exhaust gas heat recovery bin to fully recover the heat in the exhaust gas. The fuel gas and / or combustion-supporting gas is received in the inert gas generator 5, the exhaust gas received by the inert gas generator 5 heats the fuel gas and / or combustion-supporting gas, further recovers the heat in the exhaust gas, and improves the energy utilization efficiency.

[0064] In the present application, the temperature and the flow rate of different adding points of the carbonization and pulverization integrated equipment can be adjusted according to different biomass materials, so that the high yield requirement of the biomass is achieved; by adjusting the material level of the exhaust gas heat recovery bin, the exhaust gas outlet temperature is stabilized, and the maximization of heat recovery is achieved; and according to different needs of nitrogen content of downstream products, the inert gas generator can use air, oxygen-enriched air or pure oxygen as combustion-supporting gas.

[0065] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it. Those skilled in the art should understand that the technical solutions described in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An integrated biomass carbonization and pulverizing device, characterized in that: include: A raw material storage bin (1), a hopper (2), an exhaust gas heat recovery bin (10), a carbonization and pulverizing integrated device (6), a filter (3), and an inert gas generator (5); wherein The raw material storage bin (1) is connected to the hopper (2), and the biomass material is transported to the exhaust gas heat recovery bin (10) through the hopper (2); The exhaust gas heat recovery bin (10) heats the biomass material with the exhaust gas and then transports it to the carbonization and pulverization integrated equipment (6), outputting the exhaust gas after heat exchange; The carbonization and pulverizing integrated equipment (6) includes a coal mill (61) and a baking tube (62). The coal mill (61) grinds and heats the biomass material. The material with a particle size that meets a first condition is sent to the baking tube (62) by hot air and is baked in the baking tube (62). After baking, the powder that meets a second condition is sent to the filter (3) by hot air, and the powder that does not meet the second condition falls back to the coal mill (61). The filter (3) transmits the filtered powder to the gasifier through a conveying device, and outputs the filtered gas to the exhaust gas heat recovery bin (10) and the inert gas generator (5) through a gas circulation pipeline; The inert gas generator (5) is connected to the carbonization and pulverizing integrated equipment (6) and outputs heated gas to the coal mill (61) and the baking tube (62) respectively.

2. The integrated biomass carbonization and pulverizing device according to claim 1 is characterized in that: The hopper (2) comprises a vibrating hopper.

3. The integrated biomass carbonization and pulverizing device according to claim 1 is characterized in that: It also includes a quantitative feeder (8) connected to the hopper (2) and the carbonization and pulverization integrated equipment (6) to quantitatively output the biomass material from the hopper (2) to the carbonization and pulverization integrated equipment (6).

4. The integrated biomass carbonization and pulverizing device according to claim 1 is characterized in that: The carbonization and pulverizing integrated equipment (6) further includes a separator (63) and a powder return pipe. The separator (63) separates the received biomass material, and the powder that meets the second condition is sent to the filter (3). The powder that does not meet the second condition enters the powder return pipe and falls back to the coal mill (61).

5. The integrated biomass carbonization and pulverizing device according to claim 1 or 4, characterized in that: The baking tube (62) includes a plurality of air inlets, each of which is connected to an inert gas generator (5) and receives the gas output by the inert gas generator (5) to perform baking and carbonization treatment on the biomass material.

6. The integrated biomass carbonization and pulverizing device according to claim 1, characterized in that: It also includes an exhaust gas condenser (11) connected to the exhaust gas heat recovery bin (10) and used for cooling and liquefying the gas discharged from the exhaust gas heat recovery bin (10).

7. The integrated biomass carbonization and pulverizing device according to claim 6, characterized in that: The exhaust gas condenser (11) cools and liquefies the received gas to obtain wood vinegar, and transports the unliquefied gas to the gasifier.

8. The integrated biomass carbonization and pulverizing device according to claim 1, characterized in that: The inert gas generator (5) further comprises a fuel gas inlet and / or a combustion-supporting gas inlet for receiving fuel gas and / or combustion-supporting gas input from the outside.

9. The integrated biomass carbonization and pulverizing device according to claim 1, characterized in that: It also includes a circulating fan (4) connected to the filter (3) for pressurizing the gas output from the filter (3).

10. An integrated biomass carbonization and pulverization method, applied to the device according to any one of claims 1 to 9, characterized in that: include: transporting the biomass material in the raw material storage bin (1) to the exhaust gas heat recovery bin (10); The biomass material is heated by the exhaust gas in the exhaust gas heat recovery bin (10), and the heated biomass material is transported to the carbonization and pulverization integrated equipment (6), where the biomass material is subjected to carbonization and pulverization treatments; Outputting the powder obtained after the carbonization and pulverization treatments to the filter (3) through the circulating gas; The powder material filtered by the filter (3) is transmitted to the gasifier, and the filtered gas is transmitted to the exhaust gas heat recovery bin (10) and the inert gas generator (5); The gas is heated by an inert gas generator (5) and the heated gas is transmitted to the carbonization and pulverizing integrated equipment (6).

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