Waste heat recovery device and method of aftertreatment system of engine
A waste heat recovery device and waste heat recovery technology are applied to steam engine devices, engine components, combustion engines, etc., which can solve the problem of high cost and achieve the effect of reducing impact
Active Publication Date: 2016-06-29
TENNECO SUZHOU EMISSION SYST
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However, this type of selective catalytic reduction device is much more expensive than vanadium-based ones, and the cost is higher
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[0024] Please refer to figure 1 As shown, the present invention discloses a waste heat recovery device 100 of an engine aftertreatment system, which includes an engine 1, an engine intake port 11 connected to the front end of the engine, and an engine exhaust port connected to the rear end of the engine. end 12, an oxidation catalyst 2 connected downstream of the engine exhaust port 12, a particulate trap 3 downstream of the oxidation catalyst 2, a selective catalytic reduction device 4 downstream of the particulate trap 3 , a controller 5 for controlling the waste heat recovery device 100, and a Rankine cycle system 6 for recovering waste heat. Since the principle of this tail gas treatment technology is well known to those skilled in the art, the present invention will not repeat it here.
[0025] In order to realize temperature detection, the waste heat recovery device 100 of the present invention also includes a first temperature sensor 71 installed at the outlet of the p...
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A waste heat recovery device of an aftertreatment system of an engine comprises an oxidation catalytic converter, a particle trap, a selective catalytic reduction device and a controller, wherein the oxidation catalytic converter is used for being connected with the downstream portion of the exhaust end of the engine; the particle trap is located on the downstream portion of the oxidation catalytic converter; the selective catalytic reduction device is located on the downstream portion of the particle trap; and the controller is used for controlling the waste heat recovery device. The waste heat recovery device further comprises a first heat exchanger and a second heat exchanger, wherein the first heat exchanger is located between the particle trap and the selective catalytic reduction device, and the second heat exchanger is located on the downstream portion of the selective catalytic reduction device. The waste heat recovery device has the beneficial effects that waste heat recovery is conducted through the arrangement of the first heat exchanger and the second heat exchanger, and therefore the utilization efficiency of energy is improved; in addition, the exhaust temperature of gas entering the selective catalytic reduction device located on the downstream portion can be decreased by starting the first heat exchanger, so that the selection of a vanadium-based selective catalytic reduction device becomes a feasible technique; and furthermore, the invention further relates to a waste heat recovery method.
Description
technical field [0001] The invention relates to a waste heat recovery device and method of an engine aftertreatment system, and belongs to the technical field of engine exhaust aftertreatment. Background technique [0002] Existing exhaust gas treatment technologies include a combination of oxidation catalyst (DOC), particulate filter (DPF) and selective catalytic reduction (SCR). After a certain degree of use, the particle trap will be clogged, thereby affecting the back pressure of the system, so the problem of how to regenerate the particle trap needs to be solved. At present, there are two schemes for particle filter regeneration: passive regeneration and active regeneration. The effect of passive regeneration is not ideal, and the application will be subject to many restrictions; the current mainstream scheme is active regeneration. The principle of active regeneration is to remove carbon particles by means of combustion. [0003] A system for recovering waste heat us...
Claims
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Login to View More IPC IPC(8): F01N5/02F01K25/00F01N3/20
CPCY02T10/12
Inventor 杜标樊高峰蒋思望李楠赵佳
Owner TENNECO SUZHOU EMISSION SYST