CN-122007024-A - Straw edulcoration device and straw edulcoration system

Abstract

The application relates to a straw impurity removing device, wherein a vibrating plate is obliquely arranged in a device main body, and impurities to be removed falling into the higher end of the vibrating plate move along the oblique direction of the vibrating plate while vibrating under the action of gravity, so that large-grain-size straw in the materials is left on the upper layer of the materials, and heavy impurities are accumulated on the lower layer of the materials. A main airflow path is arranged in the device main body and close to the upper layer of the material, and a negative pressure source is arranged at the main airflow path to form airflow, so that the large-grain-size straws are carried upwards to the air outlet section by the airflow flowing through the main airflow path, and heavy impurities are not influenced. The vibrating plate is provided with a vent hole, and air flow is emitted in the vent hole to form an auxiliary air flow path, so that small-particle-size straws in the material layer are thrown into the main air flow path under the action of the air flow in the auxiliary air flow path, and are carried out along with large-particle-size straws, heavy impurities are remained on the vibrating plate due to the fact that the specific gravity is large even if the powdery heavy impurities are influenced by gravity, the air inlet is used as an impurity outlet, and the heavy impurities are discharged from the air inlet subsequently.

Inventors

• YU CHUNJIANG
• LI YUNCHUAN

Assignees

• 杭州云江新能源科技有限公司

Dates

Publication Date

20260512

Application Date

20260311

Claims (10)

1. 1. The utility model provides a straw edulcoration device which characterized in that includes: The device comprises a device main body, wherein a U-shaped airflow channel is formed in the device main body, and comprises a feeding section, a sorting section and an air outlet section in sequence; The vibrating plate is obliquely arranged in the sorting section and is used for bearing and conveying materials and layering different components in the materials; the air outlet end of the auxiliary air source is communicated with the space below the vibrating plate; The separation section comprises a wind separation section, and the wind separation section comprises an air inlet and an air outlet communicated with the bottom area of the air outlet section; The vibration plate is provided with a plurality of ventilation holes for guiding the air flow provided by the auxiliary air source to the plate surface of the vibration plate; the air outlet, the air separation section and the air outlet section together form a section of main air flow path flowing through the air outlet section, and the auxiliary air source and the vent hole form an auxiliary air flow path pointing to the main air flow path.
2. 2. The straw impurity removal device of claim 1, wherein the vent is configured to direct the direction of air flow emitted by the auxiliary air source toward the primary air flow path.
3. 3. The straw impurity removing device according to claim 1, wherein the air separation section is a reducing pipe with a gradually increased flow area from the air inlet to the air outlet.
4. 4. The straw impurity removing device according to claim 1, wherein an included angle between the vibration plate and a horizontal plane is within an angle range of greater than or equal to 10 degrees and less than or equal to 50 degrees.
5. 5. The straw trash device of claim 1, wherein a plurality of vent holes are spaced apart along the material flow path on the vibrating plate.
6. 6. The straw impurity removing device according to claim 1, wherein the wind speed of each section in the air outlet section is greater than or equal to the minimum wind speed required for smoothly carrying the straw with the maximum particle size in the impurity material to be removed out of the air outlet.
7. 7. The straw impurity removing device according to claim 1, wherein the air outlet of the air outlet section is connected with a negative pressure source.
8. 8. The straw impurity removing device according to claim 1, wherein the vibration plate is not provided with any ventilation holes in a region aligned below the feeding section.
9. 9. The straw impurity removing device according to claim 1, wherein no vent hole is provided in the vibration plate in an area aligned with a portion of the air separation section near the air inlet.
10. 10. A straw impurity removal system, comprising: A crushing device; the straw impurity removing apparatus according to any one of claims 1 to 9, wherein a feed section of the straw impurity removing apparatus is connected to a discharge side of the crushing apparatus; the feeder is arranged between the feeding section of the straw impurity removing device and the discharging port of the crushing device; The negative pressure source is connected with the air outlet section of the straw impurity removing device; the gas-solid separation device is arranged between the negative pressure source and the air outlet section of the straw impurity removal device.

Description

Straw edulcoration device and straw edulcoration system Technical Field The application relates to the technical field of new biomass energy, relates to a technology for removing heavy impurities from straws, and in particular relates to a straw impurity removing device and a straw impurity removing system. Background The straw is an important agricultural waste biomass resource, is used as a novel energy source raw material, and can be widely applied to industries such as combustion, gasification, biomass charcoal preparation, advanced biofuel production of green ethanol, methanol and the like. The crop straws are mostly scattered in the field during collection, heavy impurities such as stones, metals, soil impurities and the like can be mixed into the straw bags during collection and packaging, and the impurities in the crop straws must be removed as first as possible before the straws are subjected to energy conversion and utilization in order to ensure safe and economic operation of subsequent conversion processes and equipment. Straw trash removal devices are typically used after the straw has been initially crushed. The straw impurity removing device generally removes impurities through screening of sieve holes with different sizes, pneumatic separation or combination of two processes, and the like, and utilizes the difference of the coarse crushed straw and the impurities in the aspects of scale or specific gravity and the like to remove fine impurities smaller than the sieve holes, and utilizes pneumatic separation to remove heavy impurities such as soil blocks, stones or metals with larger sizes. On the one hand, when the sieve pores are utilized to separate through the material scale, the problem that the sieve pores are easy to block exists, especially when biomass materials such as straws with light texture and very poor fluidity are treated, the screening efficiency is very low, the straws after coarse crushing are typical long-strip-shaped particles, and the screening precision of the sieve pores on the material size is very poor. On the other hand, fine materials screened by using the screen mesh cannot be distinguished from powdery straws mixed therebetween except for soil dust or fine stone impurities which should be removed, thereby resulting in a reduction in the quality yield of biomass raw materials. In the process of separating straws and heavy impurities by utilizing pneumatic separation, impurities such as soil, stones and metals with a certain scale are not easy to carry by air flow and can be effectively separated, but for fine dust and crushed stones, the difference between the terminal sedimentation speed of impurity particles and the large-particle-size straws is not obvious due to small particle size, and the finely crushed soil and stone impurities in the pneumatic separation are difficult to separate in the straws, so that the ash content of biomass raw materials is increased, and the subsequent conversion and utilization process is influenced. Therefore, the traditional sieve mesh separation and pneumatic separation schemes cannot effectively separate the large-particle-size straws and straw powder from various impurity components in the straw impurity removal process. Disclosure of Invention Based on the above, it is necessary to provide a straw impurity removing device and a straw impurity removing system, aiming at the problem that the traditional scheme of separating straw and heavy impurities by utilizing sieve mesh separation and pneumatic separation can not effectively separate straw with large particle size and straw powder from various impurity components in the straw impurity removing process. In one aspect, the present application provides a straw impurity removing apparatus, comprising: The device comprises a device main body, wherein a U-shaped airflow channel is formed in the device main body, and comprises a feeding section, a sorting section and an air outlet section in sequence; The vibrating plate is obliquely arranged in the sorting section and is used for bearing and conveying materials and layering different components in the materials; the air outlet end of the auxiliary air source is communicated with the space below the vibrating plate; The separation section comprises a wind separation section, and the wind separation section comprises an air inlet and an air outlet communicated with the bottom area of the air outlet section; The vibration plate is provided with a plurality of ventilation holes for guiding the air flow provided by the auxiliary air source to the plate surface of the vibration plate; the air outlet, the air separation section and the air outlet section together form a section of main air flow path flowing through the air outlet section, and the auxiliary air source and the vent hole form an auxiliary air flow path pointing to the main air flow path. On the other hand, the application also provides a straw impurity removal system, whic