Vehicle-mounted urea solution producing system and vehicle-mounted urea solution producing system restructuring method

Abstract

The invention discloses a vehicle-mounted urea solution producing system. The vehicle-mounted urea solution producing system comprises a stirring tank, a first air compressor, a motor and a second aircompressor, wherein the motor is used for driving the first air compressor, and the power of the motor is matched with the power needed when the first air compressor supplies air to the stirring tankaccording to a required pressure flow; the second air compressor is used for supplying air to filling equipment, and the power of the second air compressor is 5-20% of the power of a centralized airsupplying air compressor in an original vehicle-mounted urea solution producing system. Original centralized air supply is changed into distributed air supply, and corresponding equipment is matched with actual needs so as to fully utilize the equipment capacity, so that the energy consumption and the production cost are reduced, the energy utilization rate is increased and social and economic benefits are good. The invention further discloses a vehicle-mounted urea solution producing system restructuring method by which the energy consumption can be lowered and the energy utilization rate canbe increased.

Description

technical field [0001] The invention relates to the production technology of urea solution for vehicles, in particular to a production system of urea solution for vehicles and a modification method for the production system of urea solution for vehicles. Background technique [0002] In the existing urea solution production system for vehicles, the mixing tank and filling equipment are supplied with centralized air by a set of large-scale high-power piston or screw air compressors, that is, centralized air supply air compressors are adopted. Among them, the amount of gas used for filling fine-tuning accounts for less than 5% of the total gas consumption, and more than 95% of the gas is used for dissolving granular crystalline urea in the stirring tank. The design pressure of piston or screw air compressor is generally 8㎏ / ㎝ 2 Around, during operation, the actual pressure required by the mixing tank is generally 0.05-0.3㎏ / ㎝ 2 When it is running normally and smoothly, the act...

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Problems solved by technology

from figure 2 It can be seen that during the stirring process, there are many dead angles in the solution flow, so that the raw materials in these places cannot be fully stirred, the solution concentration is uneven, and a large amount of undissolved crystalline urea will be deposited at the bottom of the stirring tank. up to about 20% of the total, and even up to about 30% of the total in winter

It can be seen that the main problem of the existing stirring tank is that the stirring of the solution raw materials is not sufficient and uniform, resulting in slow dissolution rate and low dissolution rate of some granular crystalline urea

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