Energy-saving and environment-friendly air pollution control device

Abstract

The invention relates to the technical field of environmentally friendly equipment and discloses an energy-saving and environment-friendly air pollution treatment device. The energy-saving and environment-friendly air pollution treatment device comprises a shell and an internal catalyst carrier, wherein the shell is embedded with a heat insulating sandwich; the catalyst carrier is divided into a plurality of blocks by circulation clearances; and a fixing casing communicating with the circulation clearances is assembled in the axis of the catalyst carrier. A control casing directly conveys tailgas to the middle and lower reaches of a catalyst through communication holes; partial path passing through the catalyst clearances is shortened; the exhaust resistance is reduced; and meanwhile, theamounts of hazardous pollutants in contact with the catalysts in different positions are comparatively uniform so that the conversion intensity is comparatively consistent; when the temperature is over-high, an ECU controls a telescopic piece to retract so that one part of gases is directly exhausted through an exhaust port to reduce the oxidizing reaction intensity in the catalyst and control the temperature in the catalyst; and when the blocking pressure in a three-way catalyst is over-high, the control casing moves so that partial tail gas is directly exhausted to reduce the pressure at anengine gas exhaust end.

Description

technical field [0001] The invention relates to the technical field of environmental protection equipment, in particular to an energy-saving and environmental-friendly air pollution control device. Background technique [0002] Air quality affects the quality of life and physical health of human beings. Air pollution control is getting more and more attention. At present, the most effective air pollution control method is to control it from the source. Motor vehicle exhaust is a relatively large source of air pollution. For the emission of harmful gases in the exhaust, a three-way catalytic converter is installed in the middle of the exhaust pipe of the starting car, which removes the harmful gases HC, CO and NO in the exhaust. X Oxidation or reduction to h 2 O, CO 2 and NO 2 and other harmless gases. [0003] see figure 1 , The three-way catalyst carrier is linearly distributed along the exhaust direction. On the one hand, the carrier causes certain obstacles to the ex...

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Problems solved by technology

[0003] see figure 1 , the three-way catalyst carrier is linearly distributed along the exhaust direction. On the one hand, the carrier will cause certain obstacles to the exhaust gas, and the exhaust pressure at the engine end will increase. In order to maintain the best air-fuel ratio, the engine intake end needs to increase suction. On the other hand, the end of the catalyst close to the engine contacts more pollutants, and its conversion intensity is greater than that of the end far away from the engine. At the same time, the catalyst releases more heat when converting pollutants, and the end far away from the engine gathers upstream The temperature is higher than the end close to the engine, the conversion intensity of different positions in the catalytic converter is different, and the service life of the catalysts in each place is quite different, which reduces the service life of the catalytic converter as a whole.

[0004] The engine's working conditions are different, and the components of the exhaust gas are different. When the CO and HC components in the exhaust gas are high, excessive oxidation reactions will occur in the catalytic reactor, and a large amount of heat generated by the oxidation reaction will cause the catalytic reactor to be overheated and damaged. In severe cases, the car will even be ignited, causing loss of life and property. Secondly, when the three-way catalytic converter is damaged, it will not affect normal driving. Some car owners will not replace it. The exhaust gas that has not been treated by the three-way catalytic converter will pollute the air. More serious, increasing the difficulty of air pollution control

[0005] After the three-way catalyst is used for a long time, it will be deactivated and cause a large blockage, which will affect the normal exhaust of the engine, further affect the internal combustion rate of the engine, increase the energy consumption of the engine, and at the same time, increase the harmful substances in the exhaust gas (even black smoke) ), increasing air pollution

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