Spray nozzle used for purifying biomass pyrolysis gas

Abstract

The invention discloses a spray nozzle used for purifying biomass pyrolysis gas. The spray nozzle comprises a main body, a nozzle body and an air intake pipe. The nozzle body is fixed at the bottom ofthe main body. Purified biomass pyrolysis gas is allowed to pass an air intake end of the air intake pipe. An air outlet end of the air intake pipe extends into the interior of the main body from thetop of the main body and communicates with an inner cavity of the nozzle body. a cavity surrounding the air intake pipe is formed in the interior of the main body. The top of the main body is equipped with a water inlet connected with the cavity. The bottom of the cavity communicates with the inner cavity of the sprayer. The nozzle is in the shape of a truncated cone. The bottom surface of the nozzle is provided with a first water spray hole. The side surface of the nozzle is equipped with multiple second water spray holes at intervals. By adoption of the structure, the spray nozzle has a mist spray effect and spray at a large angle efficiently.

Description

technical field [0001] The invention relates to the field of chemical production, in particular to a spray head for purification of biomass cracking gas. Background technique [0002] Biomass pyrolysis gasification technology can convert biomass waste materials such as crop straw and sawdust into combustible gas with high calorific value, and can avoid the secondary pollution caused by biomass waste incineration. It is considered to be a relatively promising technology. technology. In the biomass pyrolysis gasification reactor, the temperature of the pyrolysis gas is extremely high and contains a considerable part of tar, which has a great impact on the quality of the final product combustible gas, so it is very important for the cooling and purification of the pyrolysis gas . For the cooling of traditional pyrolysis gas, glass bulb cooling, column heat exchanger and plate heat exchanger are commonly used. Since these cooling methods are indirect cooling, the cooling effi...

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Problems solved by technology

This patent gives a general concept of a sprinkler head. The design of the annular sprinkler head can avoid the mutual interference between the spray water columns, but the spray head designed by this patent has poor atomization effect, large water consumption and The spray water is ring-shaped, and the heat exchange and purification effect on the cracked gas is not good

[0004] The patent bulletin also discloses a lot of design schemes about the sprinklers, but the design of the sprinklers is mostly that the water spray holes are arranged in a row array or a circular array on the plane of the lower end of the sprinkler. The outer water column will be more evacuated and the inner water column will be relatively dense, which will not have a good heat transfer effect on the pyrolysis gas; and the spray angle of the common sprinklers can only reach 60-90°, and the spray water coverage area is not wide. In order to achieve a more ideal heat transfer effect, it is necessary to add a sprinkler head during use

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