Fluidized bed biomass gas industrial kiln system

Abstract

The invention discloses a fluidized bed biomass fuel gas industrial kiln system which comprises a fluidized bed gasification unit, a feeding unit, a fuel gas purification unit and an industrial kiln unit, and the fluidized bed gasification unit comprises a fluidized bed furnace body, a stock bin and a carbon bin. The stock bin is connected with the feeding unit and used for supplying materials to the fluidized bed furnace body, the carbon bin is communicated with a carbon outlet of the fluidized bed furnace body, and the fuel gas purification unit is connected between a fuel gas outlet of the fluidized bed gasification unit and the industrial furnace kiln unit. According to the fluidized bed biomass gas industrial kiln system, the gasification temperature of biomass can be increased, the heat value and the conversion rate of gas can be increased, and the generation of impurities can be reduced, so that the fluidized bed biomass gas industrial kiln system can be applied to industrial kilns.

Description

Technical Field

[0001] This invention relates to the field of biomass gasification technology, specifically to a fluidized bed biomass gasification industrial kiln system. Background Technology

[0002] The glass and ceramics industry is a major energy consumer, and industrial kilns are the core equipment in the glass production process, accounting for more than 70% of the total energy consumption in glass production. Currently, industrial kilns in the glass and ceramics industry mainly use fossil fuels such as heavy oil and natural gas as fuel. This not only faces the problem of increasingly scarce fossil fuels and large price fluctuations, but also produces a large amount of pollutants such as carbon dioxide, sulfur dioxide, and nitrogen oxides during combustion, causing serious environmental impact. With the increasing prominence of the global energy crisis and environmental problems, finding clean and renewable alternative energy sources has become an inevitable trend for the sustainable development of the glass and ceramics industry. Biomass energy, as a abundant and renewable clean energy source with zero carbon dioxide emissions, has attracted widespread attention for its industrial applications. Biomass gasification technology is an effective means of converting biomass into combustible gas, which can be used as industrial fuel. However, existing biomass gasification technologies suffer from problems such as low gasification temperatures, low calorific value of the gas, and difficulty in purification, making them difficult to directly apply to the high-temperature requirements of glass and ceramics industrial kilns. Therefore, developing a device that can effectively apply biomass gasification high-temperature furnaces to kilns in the glass and ceramics industry, and improving the quality and utilization efficiency of biomass fuel gas, is of great significance for reducing fossil energy consumption and pollutant emissions in the glass and ceramics industry. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a fluidized bed biomass gasification industrial kiln system that addresses the defects and deficiencies of the prior art. This fluidized bed biomass gasification industrial kiln system can increase the gasification temperature of biomass, increase the calorific value and conversion rate of the gas, and reduce the generation of impurities, thereby meeting the requirements for application in industrial kilns.

[0004] The fluidized bed biomass gasification industrial kiln system of this invention includes a fluidized bed gasification unit, a feeding unit, a gas purification unit, and an industrial kiln unit. The fluidized bed gasification unit includes a fluidized bed furnace body, a silo, and a carbon bin. The silo is connected to the feeding unit and is used to feed the fluidized bed furnace body. The carbon bin is connected to the carbon outlet of the fluidized bed furnace body. The gas purification unit is connected between the gas outlet of the fluidized bed gasification unit and the industrial kiln unit.

[0005] The fluidized bed biomass gasification industrial kiln system of this invention includes a fluidized bed gasification unit comprising a fluidized bed furnace body, a feed silo, and a carbon silo. The feed silo is connected to the feeding unit and is used to feed the feed into the fluidized bed furnace body. The carbon silo is connected to the carbon outlet of the fluidized bed furnace body. The gas purification unit is connected between the gas outlet of the fluidized bed gasification unit and the industrial kiln unit. Thus, the fluidized bed gasification unit introduced in this application can increase the gasification temperature of biomass, increase the calorific value and conversion rate of the gas, and reduce the generation of impurities, thereby meeting the requirements for application in industrial kilns.

[0006] In some embodiments, the gas purification unit includes a cyclone separator and a cyclone dust collector connected in sequence.

[0007] In some embodiments, a scraper conveyor is provided between the carbon bin and the fluidized bed unit.

[0008] In some embodiments, the industrial kiln unit includes an industrial furnace and a burner, and the outlet of the gas purification unit is connected to the burner.

[0009] In some embodiments, the industrial kiln unit further includes a combustion-supporting fan, which is connected to the burner.

[0010] In some embodiments, the burner is a dual-channel burner.

[0011] In some embodiments, the fluidized bed biomass gasification industrial kiln system further includes a waste heat recovery unit, which includes a first heat exchanger and a second heat exchanger. The first heat exchanger is used to recover the waste heat from the flue gas of the fluidized bed gasification unit, and the second heat exchanger is used to recover the waste heat from the flue gas of the industrial kiln.

[0012] In some embodiments, the fluidized bed biomass gasification industrial kiln system further includes a control unit, which is electrically connected to the fluidized bed gasification unit, the feeding unit, the gas purification unit, the industrial kiln unit, and the waste heat recovery unit to achieve automated control of each unit.

[0013] In some embodiments, the feeding unit includes a sorting machine and a crusher, wherein the sorting machine is used to select biomass raw materials and convey them to the crusher, and the crusher crushes the biomass raw materials.

[0014] In some embodiments, the feeding unit further includes a drying device and a belt conveyor, the drying device being connected to the outlet of the pulverizer, and the belt conveyor being connected between the drying device and the fluidized bed gasification unit. Attached Figure Description

[0015] Figure 1This is a schematic diagram of a fluidized bed biomass gasification industrial kiln system according to an embodiment of the present invention.

[0016] Figure label: 1. Feeding unit; 2. Gas supply device; 3. Fluidized bed furnace body; 4. Carbon bin; 5. Scraper conveyor; 6. Gas purification unit; 7. Burner; 8. Industrial furnace; 9. Combustion fan. Detailed Implementation

[0017] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0018] like Figure 1 As shown, the fluidized bed biomass gasification industrial kiln system of this invention includes a fluidized bed gasification unit, a feeding unit 1, a gas purification unit 6, and an industrial kiln unit. The fluidized bed gasification unit includes a fluidized bed furnace body 3, a silo, and a carbon bin 4. The silo is connected to the feeding unit 1 and is used to feed the fluidized bed furnace body 3. The carbon bin 4 is connected to the carbon outlet of the fluidized bed furnace body 3. The gas purification unit 6 is connected between the gas outlet of the fluidized bed gasification unit and the industrial kiln unit 8.

[0019] like Figure 1 As shown, the feeding unit 1, the fluidized bed gasification unit, the gas purification unit 6 and the industrial kiln unit are connected in sequence. The fluidized bed gasification unit can perform gasification reaction on biomass raw materials to generate high-temperature gas. The high-temperature gas is purified by the gas purification unit 6 and then supplied to the industrial kiln.

[0020] The fluidized bed biomass gasification industrial kiln system of this invention includes a fluidized bed gasification unit comprising a fluidized bed furnace body 3, a feed hopper, and a carbon hopper 4. The feed hopper is connected to a feeding unit 1 and is used to supply feed to the fluidized bed furnace body 3. The carbon hopper 4 is connected to the carbon outlet of the fluidized bed furnace body 3. A gas purification unit 6 is connected between the gas outlet of the fluidized bed gasification unit and the industrial kiln unit 8. Thus, the fluidized bed gasification unit introduced in this application can increase the gasification temperature of biomass, increase the calorific value and conversion rate of the gas, and reduce the generation of impurities, thereby meeting the requirements for application in industrial kilns.

[0021] In addition, the carbon dioxide produced by biomass energy combustion can be absorbed by plant photosynthesis, forming a carbon cycle. Therefore, this invention can reduce carbon dioxide emissions in industrial production processes, and at the same time, reduce emissions of pollutants such as sulfur dioxide and nitrogen oxides by optimizing combustion and purification processes.

[0022] In some embodiments, the gas purification unit 6 includes a cyclone separator and a cyclone dust collector connected in sequence. It should be noted that the cyclone separator can remove particulate matter with a diameter greater than 10 μm from the gas, while the cyclone dust collector uses high-temperature resistant filter bags to remove fine particulate matter with a diameter greater than 1 μm from the gas. Therefore, the dual purification system consisting of the cyclone separator and the cyclone dust collector can ensure the purification effect of the gas.

[0023] In some embodiments, a scraper conveyor 5 is provided between the carbon bin 4 and the fluidized bed unit. Thus, the scraper conveyor 5 can continuously transport the carbon generated by the fluidized bed unit to the carbon bin 4 for recycling, and the biochar can be used as a soil conditioner, adsorbent, etc., to achieve resource recycling.

[0024] In some embodiments, the industrial kiln unit includes an industrial furnace 8 and a burner 7. The outlet of the gas purification unit 6 is connected to the burner 7. The industrial kiln unit also includes a combustion air blower 9, which is connected to the burner 7. Thus, the purified gas is mixed and burned with the preheated combustion air to provide heat for melting the glass or ceramic raw materials in the industrial kiln body. Specifically, the combustion air provided by the combustion air blower 9 is heated to 200-400°C by waste heat, which can improve the combustion temperature and thermal efficiency.

[0025] Preferably, the burner 7 is a dual-channel burner 7, which can achieve full mixing of gas and combustion air and improve combustion efficiency.

[0026] In some embodiments, the fluidized bed biomass gasification industrial kiln system further includes a waste heat recovery unit, which comprises a first heat exchanger and a second heat exchanger. The first heat exchanger is used to recover waste heat from the flue gas of the fluidized bed gasification unit, and the second heat exchanger is used to recover waste heat from the flue gas of the industrial kiln. Thus, the waste heat recovery unit can realize heat energy recovery and use it as waste heat biomass feedstock, gasification agent, or combustion air, achieving cascaded energy utilization and improving the energy efficiency of the entire system.

[0027] In some embodiments, the fluidized bed biomass gasification industrial kiln system further includes a control unit, which is electrically connected to the fluidized bed gasification unit, the feeding unit 1, the gas purification unit 6, the industrial kiln unit, and the waste heat recovery unit to achieve automated control of each unit.

[0028] In some embodiments, the feeding unit 1 includes a sorting machine and a crusher. The sorting machine is used to select biomass raw materials and convey them to the crusher, which crushes the biomass raw materials. For example, the sorting machine can feed biomass raw materials such as straw and sawdust into the crusher and crush them to a particle size of 20-30mm.

[0029] Furthermore, the feeding unit 1 also includes a drying device and a belt conveyor. The drying device is connected to the outlet of the crusher, and the belt conveyor is connected between the drying device and the fluidized bed gasification unit. Specifically, the drying device can dry the biomass raw material to 10-12%, and the dried biomass raw material is fed into the fluidized bed furnace 3 via the belt conveyor.

[0030] Furthermore, the fluidized bed furnace body 3 is connected to the gas supply device 2, which is used to supply oxygen-enriched air as a gasifying agent.

[0031] Furthermore, this application also includes a temperature control system, which controls the reaction temperature of the fluidized bed furnace 3 at 900-1000℃ by adjusting the supply of gasifying agent and the feed amount of biomass raw materials.

[0032] Furthermore, the fluidizing medium in the fluidized bed gasifier is quartz sand with a particle size of 0.5-1mm.

[0033] Specifically, the application process of this application is as follows: (1) Feed biomass raw materials such as straw and sawdust into a crusher to crush them to a particle size of 20-30mm, and then put them into a dryer to dry them to a moisture content of 10-12%; (2) The dried biomass raw material is conveyed into the fluidized bed furnace 3 by a belt conveyor and reacts with the oxygen-enriched air (oxygen concentration of 30%) provided by the gas supply device 2 at 900-1000℃ to produce high-temperature fuel gas. (3) The high-temperature gas first enters the cyclone separator to remove particles larger than 10 μm, and then enters the cyclone dust collector to remove fine particles larger than 1 μm. (4) The purified gas is introduced into the dual-channel burner 7 and mixed with the combustion air preheated to 300°C by the waste heat recovery unit to provide heat for the melting of glass raw materials in the glass ceramic industrial kiln body. (5) The flue gas generated by the fluidized bed gasification unit and the industrial kiln unit enters the first heat exchanger and the second heat exchanger respectively, and the recovered waste heat is used to preheat biomass raw materials, gasification agent and combustion air. The above system enables the efficient application of biomass energy in industrial kilns, reducing fossil energy consumption and pollutant emissions, and improving energy utilization efficiency.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fluidized bed biomass gasification industrial kiln system, characterized in that, The system includes a fluidized bed gasification unit, a feeding unit, a gas purification unit, and an industrial kiln unit. The fluidized bed gasification unit includes a fluidized bed furnace body, a silo, and a carbon bin. The silo is connected to the feeding unit and is used to feed the fluidized bed furnace body. The carbon bin is connected to the carbon outlet of the fluidized bed furnace body. The gas purification unit is connected between the gas outlet of the fluidized bed gasification unit and the industrial kiln unit.

2. The fluidized bed biomass gasification industrial kiln system according to claim 1, characterized in that, The gas purification unit includes a cyclone separator and a cyclone dust collector connected in sequence.

3. The fluidized bed biomass gasification industrial kiln system according to claim 1, characterized in that, A scraper conveyor is provided between the carbon bin and the fluidized bed unit.

4. The fluidized bed biomass gasification industrial kiln system according to claim 1, characterized in that, The industrial kiln unit includes an industrial kiln and a burner, and the outlet of the gas purification unit is connected to the burner.

5. The fluidized bed biomass gasification industrial kiln system according to claim 4, characterized in that, The industrial kiln unit also includes a combustion-supporting fan, which is connected to the burner.

6. The fluidized bed biomass gasification industrial kiln system according to claim 4, characterized in that, The burner is a dual-channel burner.

7. The fluidized bed biomass gasification industrial kiln system according to claim 1, characterized in that, It also includes a waste heat recovery unit, which includes a first heat exchanger and a second heat exchanger. The first heat exchanger is used to recover the waste heat of the flue gas from the fluidized bed gasification unit, and the second heat exchanger is used to recover the waste heat of the flue gas from the industrial kiln.

8. The fluidized bed biomass gasification industrial kiln system according to claim 7, characterized in that, It also includes a control unit, which is electrically connected to the fluidized bed gasification unit, the feeding unit, the gas purification unit, the industrial kiln unit, and the waste heat recovery unit to realize the automated control of each unit.

9. The fluidized bed biomass gasification industrial kiln system according to claim 1, characterized in that, The feeding unit includes a sorting machine and a crusher. The sorting machine is used to select biomass raw materials and transport them to the crusher, and the crusher crushes the biomass raw materials.

10. The fluidized bed biomass gasification industrial kiln system according to claim 9, characterized in that, The feeding unit also includes a drying device and a belt conveyor. The drying device is connected to the outlet of the pulverizer, and the belt conveyor is connected between the drying device and the fluidized bed gasification unit.

Images