Multi-layer filter screen tar collecting device cooled by utilizing refrigerating sheets, and tar collecting system

Abstract

The invention provides a multi-layer filter screen tar collecting device cooled by utilizing refrigerating sheets, and a tar collecting system. A tar product can be effectively collected. The tar collecting device is characterized by comprising the following components: a temperature guide plate, wherein the temperature guide plate comprises a temperature guide transverse plate and four temperature guide vertical arms which respectively extending upwards from four edge parts of the temperature guide transverse plate; a filter screen part, wherein the filter screen part is attached to the temperature guide transverse plate and comprises a plurality of layers of temperature guide filter screens, and the pore diameters of the temperature guide filter screens are gradually reduced along a flowdirection; a connecting pipe, wherein the connecting pipe is a transparent quartz tube and is pressed on the filter screen part; a supporting cover, wherein the supporting cover comprises a top plateand four side walls, the four side walls extend downwards from edges of the top plate and surrounds the filter screen part and the temperature guide plate, and each side wall is provided with stretching opening which corresponds to one corresponding temperature guide vertical arm and enables the temperature guide vertical arm to extend outwards; four refrigerating sheets, wherein the four refrigerating sheets are respectively pressed and connected to the outer surfaces of the four temperature guide vertical arms; four water cooling heads, wherein the four water cooling heads are respectivelyin contact with heat surfaces of the four refrigerating sheets for dissipating heat of the refrigerating sheets; and a temperature control component, wherein the temperature control component is connected with the four refrigerating sheets.

Description

technical field [0001] The invention belongs to the field of tar collection, and in particular relates to a multi-layer filter screen tar collection device cooled by refrigeration sheets, and a tar collection system comprising the device. Background technique [0002] Biomass pyrolysis refers to the process of converting biomass into low-molecular substances such as charcoal, liquid and gas through thermochemical conversion under the condition of isolating air or supplying a small amount of air. Biomass pyrolysis technology can convert low-energy-density biomass, which is difficult to handle by conventional methods, into high-energy-density gas, liquid, and solid products at a lower cost and in a continuous production process, reducing the volume of biomass and facilitating storage and transport. At the same time, high value-added chemicals can be extracted from bio-oil. [0003] Biomass pyrolysis has the following three types according to the pyrolysis conditions: [000...

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Problems solved by technology

[0011] However, in the fast pyrolysis experimental device, in order to reduce the secondary reaction of the tar produced in the fast pyrolysis process, the air flow rate that is usually introduced is relatively large, which makes it difficult to realize the absorption collection method, and the large amount of concentrated release of tar makes A lot of pyrolysis tar is discharged before it is absorbed by the solvent, and the thermal shock during the rapid heating process is relatively strong, which also makes the amount of the absorbed solvent itself change in the absorption collection method, making it impossible to measure the tar produced by pyrolysis The large thermal shock of the rapid pyrolysis process also makes it difficult to realize the cooling collection method. On the one hand, the cooling required for cooling is relatively large, and the cooling capacity of the cooling liquid in a short period of time is affected by the heat transfer method, and it is difficult to guarantee the thermal shock. On the other hand, the thermal shock may also cause the phase change of the cooling liquid itself, resulting in the instantaneous large-scale vaporization of dry ice or the boiling of liquid nitrogen, which makes the cooling collection method very difficult in actual experiments. dangers; the disadvantages of absorption and cooling tar absorption methods will be reflected in the mixed absorption method and it is difficult to avoid

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