Biomass winnowing device

Abstract

The utility model relates to a biomass winnowing device which comprises a winnowing device body, the winnowing device body is composed of a boiler, a conveying and stirring device, a dust collecting device and a circulating fan, the boiler is respectively provided with a feeding port, a discharging port and a sundry port, the discharging port is arranged above the feeding port, and the dust collecting device is arranged above the sundry port. A sundry port of the boiler is arranged below a feeding port, conveying and stirring devices are arranged at the feeding port, a discharging port and the sundry port and located in the boiler and used for facilitating feeding and discharging, and a dust collecting device is installed at the position, over the discharging port, of the top of the boiler. One end of the dust collecting device is communicated with the position above a boiler sundry port through a circulating pipeline with a circulating fan and a drying device, and biomass raw materials entering the boiler sundry port are subjected to winnowing separation through density and mass by the circulating fan. The device has the advantages of simple structure, firmness, reliability, stability in operation and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of boilers and relates to a biomass air separation device. Background Art

[0002] The co-firing of biomass fuel in coal-fired boilers utilizes renewable resources as a substitute, which is beneficial to reducing carbon emissions. However, the sources of biomass raw materials are complex, and after being crushed and processed into fuel, the water content is generally high and the calorific value is low, which is not conducive to efficient resource utilization. In addition, the crushed biomass fuel is also mixed with a large amount of non-combustible impurities such as stones, ceramics, metals and non-metals, which seriously affect the continuous and stable operation of coal-fired boilers. In severe cases, it can also damage the internal components of the boiler, affecting its service life.

[0003] Therefore, a biomass air separation device is designed to overcome the above problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and to provide a biomass air separation device with a simple structure, firmness, reliability and stable operation.

[0005] The utility model is realized through the following technical solutions: a biomass air separation device, comprising an air separation device body, the air separation device body consisting of a boiler, a conveying and stirring device, a dust collecting device and a circulating fan, wherein the boiler is respectively provided with a feed port, a discharge port and a miscellaneous material port, wherein the discharge port is arranged above the feed port, and the miscellaneous material port is arranged below the feed port, and conveying and stirring devices are arranged at the feed port, the discharge port and the miscellaneous material port in the boiler for facilitating feeding and discharging, and a dust collecting device is installed on the top of the boiler just above the discharge port. One end of the dust collecting device is connected to the position above the miscellaneous material outlet of the boiler through a circulation pipe with a circulation fan and a drying device. The biomass raw materials entering the feed inlet are separated by air separation based on density and quality through the circulation fan. Non-combustible impurities such as stones, ceramics, metals and non-metals in the biomass raw materials are discharged through the miscellaneous material outlet. Sawdust and dust in the biomass raw materials enter the dust collecting device and are collected. The drying device removes moisture from the biomass raw materials in the boiler and dries them. The dried and qualified pure biomass materials are discharged from the discharge port.

[0006] Preferably, the conveying and stirring device consists of a motor and a shaftless auger connected to the motor. The motor is arranged outside the boiler and powered by a power supply to drive the shaftless auger placed horizontally in the boiler to facilitate the conveying of materials.

[0007] Preferably, the drying device is an air heater, one end of which is connected to low-level heating steam from an external thermal power plant, and the waste heat of the steam is used as a heat source. The air heater is used to remove moisture from the biomass to increase the calorific value of the biomass fuel.

[0008] Preferably, the dust collecting device is a dust collector.

[0009] The beneficial effects of the utility model are as follows:

[0010] 1) The device of the utility model uses fluidization technology to separate harmful impurities from biomass fuel;

[0011] 2) The air heater in the device of the utility model can use the waste heat of low-level steam from the thermal power plant as a heat source, greatly improving resource utilization. The air heater removes moisture from the biomass to increase the calorific value of the biomass fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION

[0013] In order to enable those skilled in the art to more clearly understand the purpose, technical solutions and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0014] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inside", "outside", "horizontal", and "vertical" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or original referred to must have a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0015] The present invention will be described in detail below with reference to the accompanying drawings: Figure 1As shown, a biomass air separation device includes an air separation device body, which is composed of a boiler 1, a conveying and stirring device, a dust collecting device and a circulating fan 2, wherein the boiler 1 is respectively provided with a feed port 3, a discharge port 4 and a miscellaneous material port 5, wherein the discharge port 4 is arranged obliquely above the feed port 3, and the miscellaneous material port 5 is arranged obliquely below the feed port 3. The feed port 3, the discharge port 4 and the miscellaneous material port 5 are all provided with a conveying and stirring device in the boiler 1 for facilitating feeding and discharging. A dust collecting device is installed on the top of the boiler 1 directly above the discharge port 4. The dust collecting device One end of the boiler is connected to the position above the miscellaneous material port 5 of the boiler 1 through a circulation pipe 6 with a circulation fan 2 and a drying device. The biomass raw materials entering the feed port 3 are separated by air separation according to density and quality through the circulation fan 2. Non-combustible impurities such as stones, ceramics, metals and non-metals in the biomass raw materials are discharged through the miscellaneous material port 5. Fine particles such as sawdust and dust in the biomass raw materials enter the dust collecting device and are collected. The drying device removes moisture from the biomass raw materials in the boiler 1 and dries them. The dried and qualified pure biomass materials are discharged from the discharge port 4.

[0016] The conveying and stirring device is composed of a motor 7 and a shaftless auger 8 connected to the motor 7. The motor 7 is arranged outside the boiler 1 and is powered by a power supply. It is used to drive the shaftless auger 8 placed horizontally in the boiler 1 to facilitate the transportation of materials. The drying device is an air heater 9. One end of the air heater 9 is connected to the low-level heating steam of an external thermal power plant. The waste heat of the steam is used as a heat source. The air heater is used to remove moisture from the biomass to increase the calorific value of the biomass fuel. The dust collecting device is a dust collector 10. Of course, the drying device and the conveying and stirring device can be adjusted according to actual conditions to meet actual needs without any limitation.

[0017] The device of the utility model uses fluidization technology to separate harmful impurities in biomass fuel; the air heater in the device of the utility model can use the waste heat of low-level steam from the thermal power plant as a heat source, greatly improving resource utilization, and the air heater removes moisture from the biomass to increase the calorific value of the biomass fuel.

[0018] The device of the utility model utilizes the density and quality differences of biomass fuel and harmful impurities to perform air separation, and at the same time heats the circulating air to dry the biomass fuel, reduce moisture and increase calorific value; the conveying and stirring device in the boiler adopts shaftless auger conveying to ensure the circulation seal, and its dust collector can adopt a multi-cage special dust collector to facilitate the separation of free wood chips and dust, thereby improving overall efficiency.

[0019] Through the design of the utility model, according to the calculation of 20% of biomass coupled with the general unit high-temperature and high-pressure technical transformation project, 15,000 tons of standard coal can be saved annually and 49,000 tons of carbon emissions can be reduced. It has strong practicality and is worthy of vigorous promotion.

[0020] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, any equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical concepts disclosed in this utility model shall be covered by the claims of this utility model.

Claims

1. A biomass air separation device, comprising an air separation device body, characterized in that: The air separation device body is composed of a boiler (1), a conveying and stirring device, a dust collecting device and a circulating fan (2), wherein the boiler (1) is respectively provided with a feed port (3), a discharge port (4) and a miscellaneous material port (5), wherein the discharge port (4) is provided above the feed port (3), and the miscellaneous material port (5) is provided below the feed port (3), and a conveying and stirring device is provided at the feed port (3), the discharge port (4) and the miscellaneous material port (5) in the boiler (1) for facilitating feeding and discharging of materials, and a dust collecting device is installed on the top of the boiler (1) directly above the discharge port (4), and one of the dust collecting devices is provided. The end is connected to the position above the miscellaneous material port (5) of the boiler (1) through a circulation pipe (6) with a circulation fan (2) and a drying device. The biomass raw materials entering the feed port (3) are separated by air separation based on density and mass through the circulation fan (2). Stones, ceramics, metals and non-metallic non-combustible impurities in the biomass raw materials are discharged through the miscellaneous material port (5). Sawdust and dust in the biomass raw materials are collected after entering the dust collecting device. The drying device removes moisture from the biomass raw materials in the boiler (1) and dries them. The dried and qualified pure biomass materials are discharged from the discharge port (4).

2. The biomass air separation device according to claim 1, characterized in that: The conveying and stirring device is composed of a motor (7) and a shaftless auger (8) connected to the motor (7). The motor (7) is arranged outside the boiler (1) and powered by a power supply to drive the shaftless auger (8) horizontally placed inside the boiler (1) to facilitate the conveying of materials.

3. The biomass air separation device according to claim 1, characterized in that: The drying device is an air heater (9), one end of which is connected to low-level heating steam from an external thermal power plant, and the waste heat of the steam is used as a heat source. The air heater is used to remove moisture from the biomass to increase the calorific value of the biomass fuel.

4. The biomass air separation device according to claim 1, characterized in that: The dust collecting device is a dust collector (10).

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