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Solid Ammonia Ammonia Automatic Supply System Based on Engine Waste Heat Heating

A heating method and a supply system technology, applied in the field of catalytic purification of nitrogen oxides in vehicle exhaust, can solve problems such as the inability to meet the large endurance capacity, and achieve the effects of simple and easy heating scheme, time saving, and improvement of continuation ability.

Active Publication Date: 2019-09-03
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current diesel vehicles are used by users to pursue greater battery life, so the OEM has increased the fuel tank volume to 800L. The current vehicle-mounted reducing agent has certain limitations in the battery life and cannot meet the needs of large battery life. Therefore The on-board ammonia source needs to be replenished

Method used

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  • Solid Ammonia Ammonia Automatic Supply System Based on Engine Waste Heat Heating
  • Solid Ammonia Ammonia Automatic Supply System Based on Engine Waste Heat Heating
  • Solid Ammonia Ammonia Automatic Supply System Based on Engine Waste Heat Heating

Examples

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Embodiment 1

[0031] Such as image 3 As shown, engine exhaust gas is used to heat the main container 1 of the ammonia storage material, the exhaust temperature is usually between 150°C and 350°C, and the exhaust gas flow into the ammonia storage material container is controlled by the exhaust three-way valve 9 to heat the main container The internal ammonia storage material 6 desorbs and releases ammonia gas; the pressure P1 in the main container 1 of the ammonia storage material is controlled to reach the working pressure between 1.2 and 3 bar; when P1 is greater than 1.2 bar, the DCU reducing agent metering control unit 3 will The ammonia pressure value in the container, after confirming that the state meets the working conditions, calculates the amount of ammonia gas required to meet the emission treatment NOx according to the engine operating parameters transmitted by the engine ECU, and performs metered injection of ammonia gas. The ammonia gas is sprayed into the exhaust pipe at the ...

Embodiment 2

[0037] Use the exhaust gas of the engine to heat the main container 1 of the ammonia storage material, the exhaust temperature is usually between 150°C and 350°C, and the exhaust gas flow into the ammonia storage material container is controlled through the exhaust three-way valve 9 to heat the ammonia storage in the main container The material 6 desorbs and releases ammonia; the pressure P1 in the main container 1 of the ammonia storage material is controlled to reach the working pressure between 1.2 and 3 bar; Ammonia pressure value, after confirming that the state meets the working conditions, calculate the amount of ammonia gas required to meet the emission treatment of NOx according to the engine operating parameters transmitted by the engine ECU, and perform metered injection of ammonia gas. The ammonia gas is sprayed into the exhaust pipe at the front end of the SCR catalytic converter 5, and the ammonia gas is fully mixed with the exhaust gas of the engine 4, and under ...

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Abstract

The invention relates to an automatic ammonia gas supply system and method based on heating of solid ammonia by means of waste heat of an engine. The automatic ammonia gas supply system based on heating of solid ammonia by means of waste heat of the engine is characterized in that the exhaust end of the engine is connected with the gas inlet end of an SCR catalytic converter through a gas pipe, and the gas outlet end of the SCR catalytic converter is connected with a tail gas exhaust pipe; an ammonia storage material main container is connected to a pipeline of the tail gas exhaust pipe and filled with an ammonia storage material in the main container; an ammonia outlet of an ammonia storage material supply container is connected with the inlet end of the ammonia storage material main container through a gas pipe, and the ammonia storage material supply container is filled with an ammonia storage material in the supply container; and an engine coolant system is connected with the ammonia storage material supply container in parallel or in series. Waste heat of the engine is used for heating through the large solid ammonia storage material supply container, a certain pressure P2 can be established in the supply container after the ammonia storage material in the supply container is heated and desorbed to release ammonia gas, the pressure P2 is higher than the pressure P1 in an ammonia storage material container of an SSCR system, and when P2 is higher than P1, the ammonia gas in the supply container can be automatically supplied into the ammonia storage material container.

Description

technical field [0001] The invention relates to a solid ammonia ammonia gas automatic supply system and a method thereof in the way of engine waste heat heating, which are applied in the technical field of catalytic purification of nitrogen oxides in motor vehicle tail gas. Background technique [0002] The use of selective catalytic reduction (SCR) technology to treat NOx in motor vehicle exhaust is currently the mainstream technology for diesel vehicles. The use of reducing agent materials that can absorb and desorb ammonia to release ammonia is a technical upgrade of the urea aqueous solution reducing agent. . Utilizing the characteristic of forming coordination compounds between metal chlorides and ammonia gas, ammonia gas is fixed. The metal chlorides used are mainly alkaline earth metal chlorides, strontium chloride, calcium chloride, magnesium chloride, and necessary auxiliary components. . The formed ammonium compound ammonia storage material is used as the ammonia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/20F01N5/02
CPCF01N3/2066F01N5/02F01N2570/14F01N2610/02F01N2610/10F01N2610/142Y02A50/20Y02T10/12
Inventor 崔龙张克金韩建于力娜苏中辉郑晓旭
Owner CHINA FIRST AUTOMOBILE
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