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Method and apparatus for preparing aqueous urea solution used for motor vehicle

A technology of urea and solution for vehicles, which is applied in chemical instruments and methods, mixers with rotating stirring devices, dissolution, etc., can solve problems affecting the final quality of urea solutions for vehicles, and avoid inaccurate low-temperature monitoring data and monitoring The results are accurate

Active Publication Date: 2017-09-29
SHANDONG NEW BLUE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The monitoring data of the urea concentration sensor at low temperature is usually higher than the actual value of the urea concentration, and the resulting error will affect the final quality of the vehicle urea solution

Method used

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  • Method and apparatus for preparing aqueous urea solution used for motor vehicle
  • Method and apparatus for preparing aqueous urea solution used for motor vehicle

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Embodiment

[0042] Depend on figure 1 As shown, a device for manufacturing urea solution for vehicles includes a control system (not shown), a stirred tank 1, a urea concentration sensor 2 installed inside the stirred tank 1, a temperature sensor 3 and a liquid level gauge 4. The upper end of stirred tank 1 is provided with water inlet pipeline 11, and water inlet pipeline 11 is provided with water inlet valve 12 and first flow meter 13. The upper end of the stirred tank 1 is also provided with a feed inlet 14, and the lower end is provided with a liquid outlet 15, and a second flowmeter 16 and a liquid outlet valve 17 are installed at the liquid outlet 15 places.

[0043] Depend on figure 1 As shown, the urea concentration sensor 2 is an infrared sensitive urea concentration sensor. Stirring tank 1 is provided with darkroom 5, and urea concentration sensor 2 is installed in darkroom 5, can guarantee that urea concentration sensor 2 is not disturbed by external light, and monitoring res...

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Abstract

The invention discloses a method and apparatus for preparing an aqueous urea solution used for a motor vehicle. The method comprises the following steps: (a) addition of raw materials; (b) dissolving of urea particles; (c) data monitoring and correction; (d) data calculation; (e) addition of high-purity water; (f) repeating of data monitoring and correction in the step (c); and (g) output of the aqueous urea solution used for the motor vehicle. The apparatus comprises a control system, an agitation vessel, and a urea concentration sensor and a temperature sensor arranged in the agitation vessel, wherein the upper end of the agitation vessel is provided with a water inlet pipeline; the water inlet pipeline is provided with a first flowmeter; the urea concentration sensor and the first flowmeter are electrically connected with the control system; and the control system comprises a data acquisition and correction unit. Thus, the method and apparatus for preparing the aqueous urea solution used for the motor vehicle in the invention can prepare the aqueous urea solution with a qualified concentration and overcome the problem of unqualified concentration of a urea solution caused by errors in manual feeding and inaccurate low-temperature monitoring data of a urea concentration sensor in the prior art.

Description

technical field [0001] The invention belongs to the technical field of urea solution for vehicles, in particular to a method and device for manufacturing urea solution for vehicles. Background technique [0002] During the production of urea solution for vehicles, a certain amount of measured urea granules and ultrapure water are directly added to the stirring tank, mixed and stirred, and the urea solution for vehicles with a qualified concentration can be obtained. In actual production, there may be accidents in the manual feeding process, such as urea particles spilling; or there is a certain difference between the actual loading amount of urea and the marked amount when the urea leaves the factory. All of the above situations will affect the concentration of the urea solution for vehicles, resulting in the concentration of the urea solution for vehicles produced not meeting the requirements. [0003] In the prior art, a urea concentration sensor is mostly used to monitor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F7/18B01F15/00B01F1/00
CPCB01F21/10B01F27/90B01F35/2115B01F35/2132
Inventor 胡坚南张庆堂
Owner SHANDONG NEW BLUE ENVIRONMENTAL PROTECTION TECH CO LTD
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