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Spraying and falling film compound condensation apparatus for coal or biomass pyrolytic liquefaction

A biomass pyrolysis and condensation device technology, applied in steam/steam condensers, lighting and heating equipment, etc., can solve the problems affecting the yield and quality of liquid products, slow cooling speed, incomplete condensation, etc., and achieve the cost of condensation Effects of low cost, improved yield and quality, and simple device structure

Inactive Publication Date: 2008-04-16
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, practice has proved that this kind of condensing device has the disadvantages of slow cooling speed and incomplete condensation. If the high-temperature pyrolysis vapor cannot be condensed quickly, secondary cracking will easily occur, which will affect the yield and quality of liquid products.

Method used

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  • Spraying and falling film compound condensation apparatus for coal or biomass pyrolytic liquefaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Taking the spray and falling film compound condensation device in the biomass pyrolysis liquefaction equipment with an oil production capacity of 500kg / h as an example, the condenser 1 has a diameter of 1.5m and a height of 4.5m, and its interior is divided into upper, middle, and The next three parts, see Figure 1:

[0022] The upper part is the spray condensation section with a height of 1.5 meters. There are 7 atomizing nozzles 2 installed in the middle of 150mm from the top. Figure 2, the nozzle diameter is 0.6mm, which is used to atomize the pyrolysis liquid into fine droplets, which are in direct contact with the high-temperature pyrolysis gas entering from the entrance of the side wall of the condenser (300mm from the top), so that it can be cooled rapidly and condensed ;

[0023] The middle part is the falling film condensation section, with a height of 1.8 meters. The built-in shell and tube indirect heat exchanger 3 is composed of 600 heat exchange tubes with...

Embodiment 2

[0032] Take the spray and falling film composite condensing device in the biomass pyrolysis liquefaction equipment with an oil production capacity of 50kg / h as an example. The diameter of the condenser is 0.8 meters and the height is 2.5 meters; the height of the spray condensation section in the condenser is 0.8 meters, the height of the falling film condensation section in the middle is 0.8 meters, and the height range of the lower liquid storage section is 0.8 meters.

[0033] The built-in shell and tube indirect heat exchanger is composed of 400 heat exchange tubes with a diameter of 25mm.

[0034] Other structures are with embodiment 1.

Embodiment 3

[0036] Taking the spray and falling film compound condensation device in the biomass pyrolysis liquefaction equipment with an oil production capacity of 800kg / h as an example, the condenser has a diameter of 2.0 meters and a height of 5.0 meters; the height of the spray condensation section in the condenser is 1.5 meters. The height of the falling film condensation section in the middle is 2.0 meters, and the height of the lower liquid storage section is 1.5 meters.

[0037] The built-in shell and tube indirect heat exchanger is composed of 800 heat exchange tubes with a diameter of 25mm.

[0038] Other structures are with embodiment 1.

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Abstract

The invention relates to a spraying and falling film composite condensing unit used for coal or biomass pyrogenation liquification. A cylindrical condenser is divided into an upper part, a central part and a lower part, wherein the upper part is a spraying condensing section, the top of which is equally distributed with spraying nozzles; the central part is a falling film condensing section which is provided with a tube type indirect heat exchanger; the lower part is a liquid storage section. The condensing unit also comprises a fluid delivery pump, a cooling tower and corresponding pipelines and so on. Experiments show that, the spraying and falling film composite condensing unit and the self-contained complete component can meet the condensing requirement of the biomass pyrogenation liquification equipment, with the oil production capacity being 50-800 kg / h oil-producing, the liquid yield being greater than or equal to fifty percent when utilizing straw as the pyrogenation material, the liquid yield being greater than or equal to sixty percent when utilizing wood dust as the pyrogenation material, calorific values of the biological oil being all 16-18MJ / kg, the viscosity being 40-120mm<2> / s and the proportion being 1.1-1.2.

Description

technical field [0001] The invention relates to a condensation process device for pyrolysis of coal, biomass and other organic wastes. Background technique [0002] For the pyrolysis and liquefaction of coal, biomass and other organic wastes, the condensing system is generally required to be able to quickly condense the high-temperature pyrolysis vapor to improve the yield and quality of liquid products. The condensing device of the existing pyrolysis liquefaction equipment is mainly composed of a plurality of cooling vessels connected in series, and the high-temperature pyrolysis vapor is condensed through wall cooling. However, practice has proved that this kind of condensing device has the disadvantages of slow cooling speed and incomplete condensation. If the high-temperature pyrolysis vapor cannot be condensed quickly, secondary cracking will easily occur, which will further affect the yield and quality of liquid products. Contents of the invention [0003] The prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28B5/00F28B1/02F28B3/04
Inventor 朱锡锋陆强
Owner UNIV OF SCI & TECH OF CHINA
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