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Post-processing control unit for ammonia storage and supply in two-stage waste heat mode

A technology for ammonia storage, ammonia supply, and control unit, which is applied to the electronic control of exhaust treatment devices, exhaust treatment, engine components, etc. It can solve problems such as no clear instructions, technical personnel can’t implement, and no increase ratio, etc., to achieve full usability effect

Active Publication Date: 2016-07-20
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Patent No. CN200680005886.2 for 'High Density Storage of Ammonia' contains solid ammonia storage and delivery materials for ammonia absorbing / desorbing solid materials that have been compacted to a density greater than 50% of the theoretical skeletal density The material provides a solid ammonia storage material. The metal salt solid material described in this patent is also directly molded. It is stated that a binder is used. It only states that a silica fiber binder may be used, and there is no dosage ratio. Without clearly stating the details of other ingredients used, it is almost impossible for skilled personnel in this field to implement
[0017] The search and analysis of the above-mentioned patents show that the use of active ammonia storage compounds to adsorb and decompose ammonia forms an aftertreatment system applied to vehicles, which has not been reported yet.

Method used

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  • Post-processing control unit for ammonia storage and supply in two-stage waste heat mode

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preparation example Construction

[0025] The preparation and filling method of the described solid ammonia storage material 20 are as follows: adopt 58 parts of industrial anhydrous magnesium chloride, 2 parts of expanded graphite, 15 parts of deionized water, 10 parts of industrial ethanol and 15 parts of industrial ball clay. The noodle mixer mixes evenly to become wet powder, and the mixing time is 5-15 minutes. Fill it into the main ammonia storage tank 4 and the auxiliary ammonia storage tank 5 through the feeding port 7, and use the mechanical vibration method to vibrate the main ammonia storage tank 4 and the auxiliary ammonia storage tank 5. Auxiliary ammonia storage tank 5 tank body 5~10min, remove the air gap in it, the amount of feed should be 40% of the volume capacity of the tank body; put the whole tank body in a vacuum oven, start heating from room temperature 25°C under normal pressure, Average 5°C / 10min, heat up to 70°C, open the feeding port 7 during heating and drying, and discharge water vap...

Embodiment

[0028] In order to ensure the safety of the system under relatively high pressure, the main ammonia storage tank 4 is a pressure-resistant tank made of stainless steel. Insulation; the preparation sequence of the main ammonia storage tank 4 and the auxiliary ammonia storage tank 5 is to weld the tank body into a cylindrical shape first, and thermally spray the nylon insulation layer in the tank. The insulation coating is very meaningful for the vehicle users in the north, and the vehicle users in the south can Without thermal insulation coating; of course, the method of external thermal insulation coating can also be used, for example, spray thermal insulation coating on the outside of the tank, or directly use thermal insulation to insulate; the upper part of the cylinder is connected by a flange, and the corresponding parts Pre-assembled on the flange cover; the inner wall of the barrel is thermally sprayed with nylon powder once; take a piece of 50ppi nickel-based metal foam...

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Abstract

The invention relates to a post-processing control unit of ammonia storage and supply in a two-stage afterheat manner, which is characterized in that by adopting the afterheat of backflow cooling liquid of an engine, an active ammonia storage compound is heated, and ammonia is released; according to the exhaust condition level of the engine, the ammonia is introduced into the front end of an SCR (Selective Catalytic Reduction) postprocessor by means of the control unit, and the conveying injection and the atomizing decomposition of liquid-free urea are realized in an SCR system; and the system is provided with two active material storage tanks; and the secondary ammonia storage tank is firstly activated when a vehicle is started to quickly respond and reduce the pollutant discharge in the cold start. The system has the characteristic of flexibility, can satisfy the emission control target in the low-temperature cold start of the vehicle, is low in price, high in reliability and convenient to use, is used for an SCR national level-4 system or above, can also be used for an FCEV (Fuel Cell Electric Vehicle) system, satisfies the application demands of the future automobile industry and has practical values.

Description

technical field [0001] The invention relates to a post-processing control unit for ammonia storage and supply in a two-stage waste heat mode, which is mainly used in the SCR post-processing industry of automobile exhaust, and is also suitable for FCEV energy storage systems of fuel cells. Background technique [0002] At present, the world is facing comprehensive challenges of energy and environment. In terms of the selection of technical means to meet the emission standards of traditional vehicles, people still face many difficulties, for example, how to choose the technical means of after-treatment and so on. [0003] SCR (SelectiveCatalyticReduction) catalytic conversion reduction technology is a traditional post-treatment technology. The essence of this traditional SCR technology using liquid urea is to use urea to decompose ammonia at high temperature, ammonia as a reducing agent and NOX in engine exhaust react under the combined action of catalyst and temperature, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N9/00F01N3/20B65B1/22B65B31/02
CPCY02A50/20Y02T10/12Y02T10/40
Inventor 张克金崔龙陈慧明王金兴荣常如姜涛安宇鹏
Owner CHINA FIRST AUTOMOBILE
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