Tar cooling and collecting device base on efficient 3D (Three-Dimensional) heat exchange structure

Abstract

The invention provides a tar cooling and collecting device based on an efficient 3D (Three-Dimensional) heat exchange structure. The tar cooling and collecting device comprises a high-temperature section refrigerating assembly, a medium-temperature section refrigerating assembly and a low-temperature section refrigerating assembly, wherein the high-temperature section refrigerating assembly comprises multiple high-temperature section refrigerating modules; each high-temperature section refrigerating module comprises two high-temperature section liquid cooling blocks, two high-temperature section refrigerating sheets and a high-temperature section thermal conduction sheet; at least one side surface of a thermal conduction zone of the middle part of each high-temperature section thermal conduction sheet is bulged, and are provided with multiple flow guiding holes; the medium-temperature section refrigerating assembly comprises multiple medium-temperature section refrigerating modules; each medium-temperature section refrigerating module comprises two medium-temperature section liquid cooling blocks, two medium-temperature section refrigerating sheets and a medium-temperature sectionthermal conduction sheet; at least one side surface of a thermal conduction zone of the middle part of each medium-temperature section temperature conduction sheet is bulged along an axial direction,and multiple flow guiding holes are formed in the bulge; the low-temperature section refrigerating assembly comprises multiple low-temperature section refrigerating modules; each low-temperature section refrigerating module comprises two low-temperature section liquid cooling blocks, two low-temperature section refrigerating sheets and a low-temperature section thermal conduction sheet; at least one side surface of a thermal conduction zone of the low-temperature section temperature conduction sheet is bulged along the axial direction, and provided with multiple flow guiding holes. The heightof the bulges is gradually increased from a high-temperature section to a low-temperature section.

Description

technical field [0001] The invention belongs to the field of tar cooling and collecting, and in particular relates to a tar cooling and collecting device based on an efficient three-dimensional heat exchange structure. Background technique [0002] At present, the tar collection methods used in the research of coal gasification or biomass gasification mainly include condensation method, solvent absorption method and solid phase adsorption method. [0003] Each of these methods has disadvantages: [0004] 1) Condensation method is the most used method in research, usually using water, ice-water mixture or liquid nitrogen as the condensation medium. The temperature of water is generally room temperature, and the temperature of ice-water mixture is generally close to zero. These two condensing media have poor condensation effect on tar components with a dew point below zero; the temperature of liquid nitrogen is extremely low, and almost all tar can be condensed. However, The...

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Problems solved by technology

The temperature of water is generally room temperature, and the temperature of ice-water mixture is generally close to zero. These two condensing media have poor condensation effect on tar components with a dew point below zero; the temperature of liquid nitrogen is extremely low, and almost all tar can be condensed. However, The temperature of liquid nitrogen (-196°C) is lower than the boiling point of most of the gas products. When the tar is condensed, most of the gas products are also condensed, which causes the loss of gas and is not conducive to the collection and analysis of the gas;

[0005] 2) The solution absorption method is also a commonly used tar collection method. Since the components of the tar are mostly organic matter, this method usually uses organic solvents such as acetone, methylene chloride, methanol, and toluene as the tar absorption solvent. Condensation media such as condensate strengthen the absorption effect of tar, but the tar components are extremely complex, and different components have different solubility in organic solvents, which makes organic solvents show selective absorption of different components in tar, thus making it difficult to ensure effective absorption of tar; another On the one hand, the organic solvent used is volatile, and the tar collection effect is poor due to loss during the absorption process; moreover, the solution absorption method usually uses more absorption bottles, and it is more cumbersome to separate and collect the tar from the organic solvent in the later stage;

[0006] 3) The condensation method or solution absorption method usually places the absorber in a container with a condensing medium. These containers generally have poor heat insulation effect, and the temperature of the condensing medium increases during the absorption of tar, which will lead to a decrease in tar absorption efficiency; another On the one hand, the condensing medium currently used is generally ice water, dry ice and liquid nitrogen, and the temperature of the condensing medium can only be maintained at a specific temperature due to its own properties, which limits the expansion of tar product research;

[0007] 4) The key to the tar adsorption effect of the solid-phase adsorption method lies in the adsorption performance of the adsorbent. Commonly used solid-phase adsorbents are adsorbents with large specific surface areas such as activated coke and molecular sieves. Desorption and recovery of tar, the operation process is complicated and the recovery rate of tar is difficult to guarantee

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