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A kind of dry desulfurization filter for diesel engine exhaust and preparation method thereof

A filter and diesel engine technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of weakened power performance, small desulfurization capacity, and reduced combustion efficiency of diesel engines, and achieve improved desulfurization performance and desulfurization capacity. , the effect of improving combustion efficiency

Active Publication Date: 2016-11-30
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a dry desulfurization filter for diesel engine exhaust and its preparation method, which is used to solve the problem that the carrier occupies most of the volume in the current coated dry desulfurization filter, the desulfurization capacity is small, and the space velocity is large , a series of problems such as low performance of desulfurization material per unit mass of desulfurization material, large pressure drop, reduced combustion efficiency of diesel engine, weakened power performance, etc.

Method used

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  • A kind of dry desulfurization filter for diesel engine exhaust and preparation method thereof

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Embodiment 1

[0022] Embodiment 1: a kind of dry desulfurization filter that is used for diesel engine exhaust, thickness is 0.5mm, is made of MnO 2 Composed of adhesive silica gel, its preparation method is as follows:

[0023] ① Put 6g MnO 2 , 1g of silica gel and 0.5g of carboxymethyl cellulose are mixed, then add 3ml of water, and ultrasonically mix them evenly in an ultrasonic pool with a power of 100W; after adding water, carboxymethyl cellulose forms a high-viscosity transparent solution , the powdered MnO 2 stick together;

[0024] ② Fill the ultrasonic mixture into a metal vessel and extrude it with a pressure of 30kN;

[0025] ③The circular shape of the honeycomb hole is made by CNC machine tool.

[0026] ④ Then put it into a muffle furnace and bake it at 723K to form it, remove carboxymethyl cellulose, and make a carrier-free desulfurization filter.

[0027] figure 1 It is a graph showing the desulfurization rate of the unsupported desulfurization filter of this embodiment ...

Embodiment 2

[0029] Embodiment 2: a kind of dry type desulfurization filter that is used for diesel engine exhaust, thickness is 0.1mm, is made of CaCO 3 Composed of adhesive silica gel, its preparation method is as follows:

[0030] ① Put 18g CaCO 3 , 2g of silica gel and 1g of carboxymethyl cellulose were mixed, then 2ml of water was added, and ultrasonically mixed in an ultrasonic pool with a power of 100W to make it evenly mixed. After adding water, carboxymethyl cellulose formed a high-viscosity transparent solution. Powdered CaCO 3 stick together;

[0031] ② Fill the ultrasonic mixture into a metal vessel and extrude it with a pressure of 50kN;

[0032] ③The circular shape of the triangular hole is made by CNC machine tool.

[0033] ④ Then put it into a muffle furnace and bake it at 873K to form it, remove carboxymethyl cellulose, and make a carrier-free desulfurization filter.

Embodiment 3

[0034] Embodiment 3: a kind of dry desulfurization filter that is used for diesel engine exhaust, thickness is 5mm, is made of MnO 2 , Fe 2 o 3 Composed of adhesive silica gel, its preparation method is as follows:

[0035] ① Put 20g Fe 2 o 3 , 4g MnO 2 , 16g of silica gel and 2g of carboxymethyl cellulose were mixed, then 5ml of water was added, and ultrasonically mixed in an ultrasonic pool with a power of 100W; after adding water, carboxymethyl cellulose formed a high-viscosity transparent solution, Powdered Fe 2 o 3 stick together;

[0036] ② Fill the ultrasonic mixture into a metal vessel and extrude it with a pressure of 5kN;

[0037] ③The hexagonal hole structure is made by CNC machine tools.

[0038] ④ Then put it into a muffle furnace and bake it at 573K to form it, remove carboxymethyl cellulose, and make a carrier-free desulfurization filter.

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Abstract

A dry type desulfurization filter used for diesel engine exhaust and a preparing method thereof are disclosed. The dry type desulfurization filter is carrier-free, has a thickness of 0.1-5 mm, and is a porous device comprising 60-90% by mass of a desulfurization material and 10-40% by mass of silica sol. The desulfurization material is one selected from MnO2, Fe2O3, CaO, CaCO3, Ca(OH)2, MgCO3, K2CO3 and Li2CO3. The dry type desulfurization filter needs no carrier. Most of the dry type desulfurization filter is the desulfurization material. The desulfurization capacity is obviously increased. The pressure difference between two ends of the filter is reduced. A diesel engine is increased in combustion efficiency and enhanced in power performance. The space velocity is low, and desulfurization performance of per unit of the desulfurization filter is improved. By adding carboxymethylcellulose in a preparing process, the desulfurization material can be easily mechanically processed into a honeycomb pore structure or a triangle pore structure, a quadrilateral pore structure, a hexagon pore structure, and other polygon pore structures.

Description

Technical field: [0001] The invention relates to the field of tail gas purification, in particular to a dry desulfurization filter and a preparation method thereof. Background technique: [0002] Diesel engines have the advantages of strong power, high thermal efficiency and good economy, and are widely used in trucks, construction machinery, ships and other fields. With the continuous increase of diesel engines, diesel engine exhaust pollution has become the main way of environmental pollution, and the nitrogen oxides in the exhaust gas have become one of the main pollutants of the atmospheric environment. In order to reduce the emission of nitrogen oxides, the State Environmental Protection Administration has formulated more stringent emission limits for nitrogen oxides in diesel engine exhaust. [0003] Diesel engines work under oxygen-rich combustion conditions, and the exhaust gas has a high oxygen content, so the traditional three-way catalyst cannot effectively conve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/92B01D53/50
Inventor 黄宏宇大坂侑吾刘学成何兆红邓立生王南南
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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