Self-heating modular biomass baking system and baking method

Abstract

The invention discloses a self-heating modular biomass baking system and a baking method, and relates to the technical field of biomass baking. The self-heating modular biomass baking system comprises a first feeding bin, a conveying bed dryer, a dust remover, a second feeding bin, a rotary baking device, a dividing wall type heat exchanger, a combustion chamber and a purification assembly, and the conveying bed dryer is used for drying biomass discharged from the first feeding bin; the dust remover and the second feeding bin are used for transferring the dried biomass, the rotary baking device is used for baking the biomass and producing pyrolysis gas, and the combustion chamber is used for producing flue gas by combusting the pyrolysis gas so as to perform heat exchange in the dividing wall type heat exchanger and the conveying bed dryer to bake and dry the biomass. And the purification assembly is used for purifying the flue gas after heat exchange. According to the self-heating modular biomass baking system, pyrolysis gas generated by baking serves as fuel to provide heat energy for baking and drying, consumption of an external heat source is replaced, production energy consumption is reduced, and cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of biomass baking, and in particular to a self-heating modular biomass baking system and a baking method. Background Art

[0002] In the context of low carbon, using biomass as raw material to produce synthesis gas and then produce green methanol, hydrogen, etc. is a hot topic in industry research. However, due to the complex types, different sizes, high water content, strong hydrophilicity, low energy density, and difficulty in storage, biomass is difficult to use directly.

[0003] Biomass torrefaction technology, also known as low-temperature pyrolysis, is a process of removing moisture and light volatiles from biomass by heating at a temperature of 200-300°C in the absence of oxygen or in the absence of oxygen. The biomass semi-coke produced by biomass torrefaction has the advantages of high energy density, good grindability, significantly reduced tar produced by gasification, and hydrophobicity. Therefore, torrefaction is a method for converting biomass of different sources and qualities into uniform raw materials that are easy to gasify. However, the torrefaction process requires additional heat consumption, and there is a problem of high energy consumption in the production process, and the production cost is high. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes a self-heating modular biomass baking system, which divides drying and baking into blocks, and uses the pyrolysis gas generated by baking as fuel to provide thermal energy for baking and drying, thereby replacing the consumption of external heat sources. The heat of the flue gas in the high-temperature section is used for baking, and the heat of the flue gas in the low-temperature section is used for drying, thereby making full use of the thermal energy of the hot flue gas, reducing the waste of thermal energy, reducing production energy consumption and lowering costs.

[0006] The embodiment of the present invention also provides a self-heating modular biomass baking method.

[0007] The self-heating modular biomass torrefaction system of the embodiment of the present invention comprises:

[0008] A first feed bin, the first feed bin having a first feed port and a first discharge port and being used to store the crushed biomass, the first feed bin being provided with a first valve corresponding to the first discharge port;

[0009] A conveyor bed dryer, the conveyor bed dryer having a first inlet, a second inlet and a first outlet, the first inlet being connected to the first discharge port, the conveyor bed dryer being used to dry the biomass and discharge the dried biomass through the first outlet;

[0010] A dust collector and a second feed bin, the dust collector and the second feed bin are arranged in sequence and are connected, the dust collector is connected to the first outlet, the second feed bin has a second feed port and a second discharge port and a second valve is provided corresponding to the second discharge port, and the dust collector has a second outlet for exhausting gas;

[0011] A rotary roaster, the rotary roaster having a third inlet, a third outlet and a fourth outlet, the third inlet is connected to the second discharge port, the third outlet is used to discharge pyrolysis gas generated by partial pyrolysis of biomass, and the fourth outlet is used to discharge roasted solid products;

[0012] A partition-type heat exchanger and a combustion chamber, wherein the partition-type heat exchanger is sleeved on the rotary roaster and has a fourth inlet and a fifth outlet, the combustion chamber comprises a first burner and a second burner, the first burner is connected to the third outlet to burn pyrolysis gas to generate flue gas, the second burner is connected to a combustible gas delivery pipe, the combustion chamber has a sixth outlet, the sixth outlet is connected to the fourth inlet, and the fifth outlet is connected to the second inlet;

[0013] A purification component is communicated with the second outlet and is used for purifying the flue gas.

[0014] The self-heating modular biomass torrefaction system of the embodiment of the present invention divides the drying and torrefaction into blocks, and uses the pyrolysis gas generated by torrefaction as fuel to provide thermal energy for torrefaction and drying, thereby replacing the consumption of external heat sources. The heat of the flue gas in the high-temperature section is used for torrefaction, and the heat of the flue gas in the low-temperature section is used for drying, thereby making full use of the thermal energy of the hot flue gas, reducing the waste of thermal energy, reducing production energy consumption and lowering costs.

[0015] In some embodiments, it includes a feeding belt conveyor, a first conveying pipe and a second conveying pipe, the feeding belt conveyor is used to convey the crushed biomass, the first conveying pipe and the second conveying pipe are arranged in parallel at the discharge end of the feeding belt conveyor, the other end of the first conveying pipe is connected to the first feed port, and the other end of the second conveying pipe is connected to the second feed port, the feeding belt conveyor is provided with a first moisture meter for measuring the moisture content of the biomass, the first conveying pipe is used to open when the moisture content of the biomass measured by the first moisture meter is greater than 10%, and the second conveying pipe is used to open when the moisture content of the biomass measured by the first moisture meter is ≤10%.

[0016] In some embodiments, a third feed pipe is provided between the second feed bin and the rotary roaster, and a third valve and a second moisture meter are provided on the third feed pipe, and the third valve is used to close when the moisture content of the biomass measured by the second moisture meter is greater than 10%. The conveyor bed dryer has a fourth inlet, and the fourth inlet is connected to a fourth feed pipe, and the other end of the fourth feed pipe is connected to the first feed pipe and to the side of the third valve away from the rotary roaster. A fourth valve is provided on the fourth feed pipe, and the fourth valve is used to open when the moisture content of the biomass measured by the second moisture meter is greater than 10%.

[0017] In some embodiments, the conveyor bed dryer includes a vertical pipe for conveying biomass, a third moisture meter and a return pipe are provided at the end of the vertical pipe, a fifth valve is provided on the return pipe and the other end of the return pipe is connected to the vertical pipe, and the fifth valve is used to open when the moisture content of the biomass measured by the third moisture meter is greater than 10%.

[0018] In some embodiments, a blower is included, and an air outlet of the blower is respectively connected to a first air supply pipe and a second air supply pipe, the first air supply pipe is connected to the first burner, and the second air supply pipe is connected to the second burner.

[0019] In some embodiments, a slag discharger and a fine grinder are included, wherein the slag discharger is disposed between the rotary roaster and the fine grinder, the slag discharger is used to transport the roasted solid product discharged from the fourth outlet to the fine grinder, and the fine grinder is used to grind and powder the roasted solid product and transport it to a storage bin.

[0020] In some embodiments, the slag discharger is a water-cooled slag discharger, and the slag discharger is sequentially connected to a circulation pump and a cooling tower through a cooling water pipe, and the water-cooled slag discharger is used to cool the baked solid product.

[0021] In some embodiments, the purification component includes an activated carbon reactor and an induced draft fan connected in sequence, the activated carbon reactor is used to desulfurize and denitrify the flue gas, and the induced draft fan is used to extract the purified flue gas and transport it to the chimney.

[0022] The self-heating modular biomass roasting method of the embodiment of the present invention includes the self-heating modular biomass roasting system of any of the above embodiments, and the roasting method includes the following steps:

[0023] S1: Turn on the second burner, transport the combustible gas through the combustible gas transport pipe to heat the gas in the combustion chamber, and the heated gas passes through the partition heat exchanger and the transport bed dryer for preheating;

[0024] S2: Open the first valve, the first feed bin discharges the crushed biomass to the conveyor bed dryer, the conveyor bed dryer performs preliminary drying on the biomass, and then transports it to the dust collector through the first outlet, and then reaches the second feed bin after passing through the dust collector;

[0025] S3: Open the second valve, the dried biomass in the second feed bin enters the rotary roaster for roasting, part of the biomass is pyrolyzed to form pyrolysis gas and reaches the second burner through the third outlet, and the roasted solid product is discharged through the fourth outlet;

[0026] S4: In the combustion chamber, the first burner is ignited with the pyrolysis gas as fuel, and the second burner is turned off, and the heat generated by the first burner provides heat energy for the rotary roaster and the conveyor bed dryer.

[0027] In some embodiments, it includes a feeding belt conveyor and a first conveying pipe and a second conveying pipe arranged in parallel at the discharge end of the feeding belt conveyor, the first conveying pipe is used to convey biomass with a moisture content of >10% to the first feeding port, and the second conveying pipe is used to convey biomass with a moisture content of ≤10% to the second feeding port. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a self-heating modular biomass baking system according to an embodiment of the present invention.

[0029] Reference numerals:

[0030] The first feed bin 1; the first valve 11; the conveyor bed dryer 2; the fourth feed pipe 21; the fourth valve 22; the dust collector 3; the second feed bin 4; the second valve 41; the third feed pipe 42; the third valve 43; the rotary roaster 5; the partition wall heat exchanger 6; the combustion chamber 7; the first burner 71; the second burner 72; the feed belt conveyor 8; the first feed pipe 81; the second feed pipe 82; the blower 9; the slag discharger 10; the fine grinder 101; the circulating pump 102; the cooling tower 103; the activated carbon reactor 104; the induced draft fan 105. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] like Figure 1As shown, the self-heating modular biomass roasting system of the embodiment of the present invention includes a first feed bin 1, a conveyor bed dryer 2, a dust collector 3, a second feed bin 4, a rotary roaster 5, a partition heat exchanger 6, a combustion chamber 7 and a purification component, the first feed bin 1 has a first feed port and a first discharge port and is used to store the crushed biomass, the first feed bin 1 is provided with a first valve 11 corresponding to the first discharge port, the conveyor bed dryer 2 has a first inlet, a second inlet and a first outlet, the first inlet is connected to the first discharge port, the conveyor bed dryer 2 is used to dry the biomass and discharge the dried biomass through the first outlet, the dust collector 3 and the second feed bin 4 are sequentially arranged and connected, the dust collector 3 is connected to the first outlet, the second feed bin 4 has a second feed port and a second discharge port and corresponds to The second discharge port is provided with a second valve 41, the dust collector 3 has a second outlet for discharging gas, the rotary roaster 5 has a third inlet, a third outlet and a fourth outlet, the third inlet is connected to the second discharge port, the third outlet is used to discharge pyrolysis gas generated by partial pyrolysis of biomass, and the fourth outlet is used to discharge roasted solid products, the partition wall heat exchanger 6 is sleeved on the rotary roaster 5 and has a fourth inlet and a fifth outlet, the combustion chamber 7 includes a first burner 71 and a second burner 72, the first burner 71 is connected to the third outlet to burn pyrolysis gas to generate flue gas, the second burner 72 is connected to a combustible gas delivery pipe, the combustion chamber 7 has a sixth outlet, the sixth outlet is connected to the fourth inlet, the fifth outlet is connected to the second inlet, and the purification component is connected to the second outlet and is used to purify the flue gas.

[0033] When the self-heating modular biomass roasting system of the embodiment of the present invention is working, the combustible gas delivery pipe delivers combustible gas (diesel, liquefied gas or natural gas) to the second burner 72, the second burner 72 is turned on, and the combustible gas is burned in the combustion chamber 7 to heat the gas. The heated gas provides heat energy to the rotary roaster 5 and the conveyor bed dryer 2 through the partition heat exchanger 6, thereby providing suitable temperature conditions for the drying and roasting of the biomass. The first valve 11 is opened in the first feed bin 1 to deliver the crushed biomass to the conveyor bed dryer 2, and the conveyor bed dryer 2 dries the biomass and outputs it through the first outlet. The biomass is sent to the dust collector 3 and discharged through the dust collector 3 to reach the second feed bin 4. The second valve 41 of the second feed bin 4 is opened, and the biomass in the second feed bin 4 enters the rotary roaster 5 for roasting. A small amount of organic components in the biomass are further pyrolyzed, and non-condensable gases and volatiles are analyzed to generate pyrolysis gas and roasted solid products. The pyrolysis gas reaches the second burner 72 through the third outlet, and the roasted solid products are discharged through the fourth outlet. In the combustion chamber 7, the first burner 71 is ignited with the pyrolysis gas as fuel, and the heat generated by the first burner 71 provides heat energy for the rotary roaster 5 and the conveyor bed dryer 2.

[0034] The self-heating modular biomass torrefaction system of the embodiment of the present invention divides the drying and torrefaction into blocks, and uses the pyrolysis gas generated by torrefaction as fuel to provide thermal energy for torrefaction and drying, thereby replacing the consumption of external heat sources. The heat of the flue gas in the high-temperature section is used for torrefaction, and the heat of the flue gas in the low-temperature section is used for drying, thereby making full use of the thermal energy of the hot flue gas, reducing the waste of thermal energy, reducing production energy consumption and lowering costs.

[0035] Optionally, the rotary roaster 5 adopts a double-drum drive structure. Under the action of the inner drum guide plate of the rotary roaster 5, the biomass particles (water content ≤ 5%) gradually heat up through heat exchange with the inner drum wall during the slow forward movement, and the internal moisture is continuously vaporized and precipitated to further dry. When reaching the rear end of the inner drum, the material falls from the inner drum into the outer drum. The material entering the outer drum runs from the rear end to the front end under the action of the outer drum guide plate, and quickly heats up after heat exchange with the drum wall, and the temperature can reach the baking temperature (200-300°C), thereby ensuring the baking effect of the biomass.

[0036] In some embodiments, Figure 1 As shown, it includes a feeding belt conveyor 8, a first conveying pipe 81 and a second conveying pipe 82. The feeding belt conveyor 8 is used to convey the crushed biomass. The first conveying pipe 81 and the second conveying pipe 82 are arranged in parallel at the discharge end of the feeding belt conveyor 8. The other end of the first conveying pipe 81 is connected to the first feed port, and the other end of the second conveying pipe 82 is connected to the second feed port. The feeding belt conveyor 8 is provided with a first moisture meter for measuring the moisture content of the biomass. The first conveying pipe 81 is used to open when the moisture content of the biomass measured by the first moisture meter is greater than 10%, and the second conveying pipe 82 is used to open when the moisture content of the biomass measured by the first moisture meter is ≤10%.

[0037] Specifically, a biomass crusher is provided corresponding to the feeding belt conveyor 8. The biomass crusher is used to perform primary crushing on raw biomass with a moisture content of ≤35% and different sizes, and convert it into coarse biomass particles with a particle size of ≤50 mm, and convey the coarse biomass particles to the feeding belt conveyor 8. The moisture content of the coarse biomass particles is measured by a first moisture meter. When the moisture content of the biomass is greater than 10%, the first conveying pipe 81 is opened, and the biomass is conveyed to the conveyor bed dryer 2 through the first conveying pipe 81. When the moisture content of the biomass is ≤10%, the second conveying pipe 82 is opened, and the biomass is conveyed to the rotary roaster 5 through the second conveying pipe 82. The drying and roasting operations are fully utilized in a segmented manner, and a corresponding combination is adopted according to the specific situation of the biomass. For example, for biomass with a low moisture content, the drying module can be cancelled, and only the roasting treatment is retained, thereby reducing the demand for heat, improving the roasting process of the biomass, and improving production efficiency.

[0038] In some embodiments, Figure 1As shown, a third feed pipe 42 is provided between the second feed bin 4 and the rotary roaster 5, and a third valve 43 and a second moisture meter are provided on the third feed pipe 42. The third valve 43 is used to close when the moisture content of the biomass measured by the second moisture meter is greater than 10%. The conveyor bed dryer 2 has a fourth inlet, and the fourth inlet is connected to a fourth feed pipe 21. The other end of the fourth feed pipe 21 is connected to the first feed pipe 81 and is connected to the side of the third valve 43 away from the rotary roaster 5. The fourth feed pipe 21 is provided with a fourth valve 22, and the fourth valve 22 is used to open when the moisture content of the biomass measured by the second moisture meter is greater than 10%.

[0039] Specifically, the biomass in the second feed bin 4 reaches the third conveying pipe, and the second moisture meter detects the moisture content of the biomass. If the moisture content of the biomass measured by the second moisture meter is greater than 10%, the biomass drying effect does not reach the expected target and the biomass needs to be dried again. The third valve 43 is closed and the fourth valve 22 is opened. The biomass in the third conveying pipe 42 re-enters the conveying bed dryer 2 through the fourth inlet along the fourth conveying pipe 21. The conveying bed dryer 2 re-dries the biomass to ensure the baking effect of the biomass. If the moisture content of the biomass measured by the second moisture meter is ≤10%, the third valve 43 is opened and the fourth valve 22 is closed to allow the biomass to smoothly enter the rotary baking device 5.

[0040] In some embodiments, the conveyor bed dryer 2 includes a vertical pipe for conveying biomass, a third moisture meter and a return pipe are provided at the end of the vertical pipe, a fifth valve is provided on the return pipe and the other end of the return pipe is connected to the vertical pipe, and the fifth valve is used to open when the moisture content of the biomass measured by the third moisture meter is greater than 10%.

[0041] By arranging a third moisture meter and a return pipe in the conveyor bed dryer 2, the moisture content of the biomass can be detected at the end of the vertical pipe. When the moisture content of the biomass is greater than 10%, it indicates that the drying effect has not reached the expected target. The fifth valve can be opened to return the biomass along the return pipe to the conveying starting end of the conveyor bed dryer 2, and the biomass can be dried again to ensure the drying effect of the biomass.

[0042] In some embodiments, Figure 1 As shown, it includes a blower 9, and the air outlet of the blower 9 is respectively connected to the first air supply pipe and the second air supply pipe, the first air supply pipe is connected to the first burner 71, and the second air supply pipe is connected to the second burner 72. By setting the blower 9, air is respectively delivered to the first burner 71 and the second burner 72 to ensure the combustion quality in the combustion chamber 7 and ensure the heating effect of the rotary dryer and the conveyor bed dryer 2.

[0043] In some embodiments, Figure 1As shown, it includes a slag discharger 10 and a fine grinder 101. The slag discharger 10 is arranged between the rotary roaster 5 and the fine grinder 101. The slag discharger 10 is used to transport the roasted solid product discharged from the fourth outlet to the fine grinder 101. The fine grinder 101 is used to grind and powder the roasted solid product and transport it to the storage bin. The roasted solid product is ground by the slag discharger 10 and the fine grinder 101 for easy storage and utilization.

[0044] In some embodiments, the slag discharger 10 is a water-cooled slag discharger 10, and the slag discharger 10 is connected to a circulating pump 102 and a cooling tower 103 in sequence through a cooling water pipe. The water-cooled slag discharger 10 is used to cool the baked solid product. The water in the cooling tower 103 is circulated to the water-cooled slag discharger 10 through the circulating pump 102 to facilitate the cooling of the baked solid product for storage after grinding.

[0045] In some embodiments, Figure 1 As shown, the purification component includes an activated carbon reactor 104 and an induced draft fan 105 which are connected in sequence. The activated carbon reactor 104 is used to purify the flue gas by desulfurization and denitrification, and the induced draft fan 105 is used to extract the purified flue gas and transport it to the chimney.

[0046] Specifically, during the baking process, the high-temperature flue gas in the combustion chamber 7 is passed through the rotary baking device 5 for heat exchange and then passed through the induced draft fan 105 to the upstream conveyor bed dryer 2 as a drying heat source to dry the biomass raw materials. The waste flue gas after heat exchange is dedusted by the dust collector 3, and after desulfurization and denitrification by the activated carbon reactor 104, the final clean flue gas is sent to the chimney by the induced draft fan 105 and then discharged into the atmosphere. By setting up the activated carbon reactor 104, the flue gas generated in the combustion chamber 7 is purified to meet environmental protection requirements and reduce pollution to the environment.

[0047] For the waste gas after drying, an ultra-low bag dust collector 3 or a combination of a cyclone dust collector 3 and a bag dust collector 3 is used to achieve ultra-low dust emission; for NO x , using low nitrogen burner, NO x <60 mg / m 3 An activated carbon reactor 104 is installed at the tail to carry out fine denitration through the principle of oxidation denitration reaction and finally realize NO x Less than 50 mg / m 3 The sulfur content in biomass is very low, and the SO2 in the flue gas can be removed by the tail activated carbon reactor 104 to make its concentration less than 35mg / m 3 , in order to achieve ultra-low emission levels of waste flue gas.

[0048] The self-heating modular biomass baking system of the embodiment of the present invention has the following beneficial effects:

[0049] (1) A modular design is adopted to divide the drying and torrefaction into sections, and the corresponding combination can be adopted according to the specific conditions of the biomass. For example, for biomass with low moisture content, the drying operation can be cancelled and only torrefaction can be performed.

[0050] (2) When the system is operating normally, the heat required for drying and baking is provided by the pyrolysis gas generated during baking as fuel, achieving "self-sustaining" heat. At the same time, the thermal energy of the hot flue gas is fully utilized. The heat in the high-temperature section is used for baking, and the heat in the low-temperature section is used for drying.

[0051] (3) The rapid conveyor bed drying process is simple and has a high dehydration rate. At the same time, for materials with high moisture content, the drying effect can be enhanced by extending the residence time of the materials in the conveyor bed dryer, so that the biomass particles that do not meet the moisture standard can be returned to the conveyor bed dryer.

[0052] The following describes a self-heating modular biomass roasting method according to an embodiment of the present invention.

[0053] The self-heating modular biomass roasting method of the embodiment of the present invention includes the self-heating modular biomass roasting system of any of the above embodiments, and the roasting method includes the following steps:

[0054] S1: Turn on the second burner, transport the combustible gas through the combustible gas transport pipe to heat the gas in the combustion chamber, and the heated gas passes through the partition heat exchanger and the transport bed dryer for preheating;

[0055] S2: Open the first valve, the first feed bin discharges the crushed biomass to the conveyor bed dryer, the conveyor bed dryer performs preliminary drying on the biomass, and then transports it to the dust collector through the first outlet, and then reaches the second feed bin after passing through the dust collector;

[0056] S3: Open the second valve, the dried biomass in the second feed bin enters the rotary roaster for roasting, part of the biomass is pyrolyzed to form pyrolysis gas and reaches the second burner through the third outlet, and the roasted solid product is discharged through the fourth outlet;

[0057] S4: In the combustion chamber, the first burner is ignited with the pyrolysis gas as fuel, and the second burner is turned off, and the heat generated by the first burner provides heat energy for the rotary roaster and the conveyor bed dryer.

[0058] The self-heating modular biomass roasting method of the embodiment of the present invention divides drying and roasting into blocks, and uses the pyrolysis gas generated by roasting as fuel to provide thermal energy for roasting and drying, replacing the consumption of external heat sources. The heat of the flue gas in the high-temperature section is used for roasting, and the heat of the flue gas in the low-temperature section is used for drying, thereby making full use of the thermal energy of the hot flue gas, reducing the waste of thermal energy, reducing production energy consumption and lowering costs.

[0059] In some embodiments, it includes a feeding belt conveyor and a first conveying pipe and a second conveying pipe arranged in parallel at the discharge end of the feeding belt conveyor. The first conveying pipe is used to convey biomass with a moisture content of >10% to the first feeding port, and the second conveying pipe is used to convey biomass with a moisture content of ≤10% to the second feeding port. The segmented setting of drying and baking operations is fully utilized, and the corresponding baking method is performed according to the moisture content of the biomass, which can reduce the demand for heat, improve the baking process of the biomass, and improve production efficiency.

[0060] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A self-heating modular biomass baking system, characterized in that: include: A first feed bin, the first feed bin having a first feed port and a first discharge port and being used to store the crushed biomass, the first feed bin being provided with a first valve corresponding to the first discharge port; A conveyor bed dryer, the conveyor bed dryer having a first inlet, a second inlet and a first outlet, the first inlet being connected to the first discharge port, the conveyor bed dryer being used to dry the biomass and discharge the dried biomass through the first outlet; A dust collector and a second feed bin, the dust collector and the second feed bin are arranged in sequence and are connected, the dust collector is connected to the first outlet, the second feed bin has a second feed port and a second discharge port and a second valve is provided corresponding to the second discharge port, and the dust collector has a second outlet for exhausting gas; A rotary roaster, the rotary roaster having a third inlet, a third outlet and a fourth outlet, the third inlet is connected to the second discharge port, the third outlet is used to discharge pyrolysis gas generated by partial pyrolysis of biomass, and the fourth outlet is used to discharge roasted solid products; A partition-type heat exchanger and a combustion chamber, wherein the partition-type heat exchanger is sleeved on the rotary roaster and has a fourth inlet and a fifth outlet, the combustion chamber comprises a first burner and a second burner, the first burner is connected to the third outlet to burn pyrolysis gas to generate flue gas, the second burner is connected to a combustible gas delivery pipe, the combustion chamber has a sixth outlet, the sixth outlet is connected to the fourth inlet, and the fifth outlet is connected to the second inlet; A purification component is communicated with the second outlet and is used for purifying the flue gas.

2. The self-heating modular biomass roasting system according to claim 1, characterized in that: The invention comprises a feeding belt conveyor, a first conveying pipe and a second conveying pipe, wherein the feeding belt conveyor is used to convey the crushed biomass, the first conveying pipe and the second conveying pipe are arranged in parallel at the discharge end of the feeding belt conveyor, the other end of the first conveying pipe is connected to the first feeding port, and the other end of the second conveying pipe is connected to the second feeding port, the feeding belt conveyor is provided with a first moisture meter for measuring the moisture content of the biomass, the first conveying pipe is used to open when the moisture content of the biomass measured by the first moisture meter is greater than 10%, and the second conveying pipe is used to open when the moisture content of the biomass measured by the first moisture meter is less than or equal to 10%.

3. The self-heating modular biomass roasting system according to claim 2, characterized in that: A third feed pipe is provided between the second feed bin and the rotary roaster, and a third valve and a second moisture meter are provided on the third feed pipe, and the third valve is used to close when the moisture content of the biomass measured by the second moisture meter is greater than 10%. The conveyor bed dryer has a fourth inlet, and the fourth inlet is connected to a fourth feed pipe, and the other end of the fourth feed pipe is connected to the first feed pipe and to the side of the third valve away from the rotary roaster. A fourth valve is provided on the fourth feed pipe, and the fourth valve is used to open when the moisture content of the biomass measured by the second moisture meter is greater than 10%.

4. The self-heating modular biomass roasting system according to claim 2, characterized in that: The conveyor bed dryer comprises a vertical pipe for conveying biomass, a third moisture meter and a return pipe are arranged at the end of the vertical pipe, a fifth valve is arranged on the return pipe and the other end of the return pipe is connected to the vertical pipe, and the fifth valve is used to open when the moisture content of the biomass measured by the third moisture meter is greater than 10%.

5. The self-heating modular biomass roasting system according to claim 1, characterized in that: It comprises a blower, wherein the air outlet of the blower is respectively connected with a first air supply pipe and a second air supply pipe, the first air supply pipe is connected with the first burner, and the second air supply pipe is connected with the second burner.

6. The self-heating modular biomass torrefaction system according to claim 1, characterized in that: It includes a slag discharger and a fine grinder. The slag discharger is arranged between the rotary roaster and the fine grinder. The slag discharger is used to transport the roasted solid product discharged from the fourth outlet to the fine grinder. The fine grinder is used to grind and powder the roasted solid product and transport it to a storage bin.

7. The self-heating modular biomass roasting system according to claim 6, characterized in that: The slag discharger is a water-cooled slag discharger, and the slag discharger is sequentially connected to a circulation pump and a cooling tower through a cooling water pipe, and the water-cooled slag discharger is used to cool down the baked solid product.

8. The self-heating modular biomass roasting system according to claim 1, characterized in that: The purification component comprises an activated carbon reactor and an induced draft fan which are connected in sequence. The activated carbon reactor is used to purify the flue gas by desulfurization and denitrification, and the induced draft fan is used to extract the purified flue gas and transport it to the chimney.

9. A self-heating modular biomass roasting method, characterized in that: Based on the self-heating modular biomass baking system according to any one of claims 1 to 8, the baking method comprises the following steps: S1: Turn on the second burner, transport the combustible gas through the combustible gas transport pipe to heat the gas in the combustion chamber, and the heated gas passes through the partition heat exchanger and the transport bed dryer for preheating; S2: Open the first valve, the first feed bin discharges the crushed biomass to the conveyor bed dryer, the conveyor bed dryer performs preliminary drying on the biomass, and then transports it to the dust collector through the first outlet, and then reaches the second feed bin after passing through the dust collector; S3: Open the second valve, the dried biomass in the second feed bin enters the rotary roaster for roasting, part of the biomass is pyrolyzed to form pyrolysis gas and reaches the second burner through the third outlet, and the roasted solid product is discharged through the fourth outlet; S4: In the combustion chamber, the first burner is ignited with the pyrolysis gas as fuel, and the second burner is turned off, and the heat generated by the first burner provides heat energy for the rotary roaster and the conveyor bed dryer.

10. The self-heating modular biomass roasting method according to claim 9, characterized in that: It comprises a feeding belt conveyor and a first conveying pipe and a second conveying pipe which are arranged in parallel at the discharge end of the feeding belt conveyor. The first conveying pipe is used to convey biomass with a moisture content greater than 10% to a first feeding port, and the second conveying pipe is used to convey biomass with a moisture content less than 10% to a second feeding port.

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