CN104121769A - Method for drying honeycomb type denitrated ceramic catalyst - Google Patents
Method for drying honeycomb type denitrated ceramic catalyst Download PDFInfo
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- CN104121769A CN104121769A CN201310621949.9A CN201310621949A CN104121769A CN 104121769 A CN104121769 A CN 104121769A CN 201310621949 A CN201310621949 A CN 201310621949A CN 104121769 A CN104121769 A CN 104121769A
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Abstract
The invention discloses a method for drying a honeycomb type denitrated ceramic catalyst and belongs to the technical field of catalysts for the selective catalytic reduction method. The method for drying the honeycomb type denitrated ceramic catalyst comprises the first drying step of drying the honeycomb type denitrated ceramic catalyst through a drying device and the second drying step of drying the honeycomb type denitrated ceramic catalyst through a drying device. According to the method for drying the honeycomb type denitrated ceramic catalyst, the whole drying process is conducted in a circulating mode, no waste gas is generated, and environmental pollution is avoided; heat is fully utilized, the drying capacity is high, long-term experiment results show that the drying yield reaches 91%, energy is saved, and the production cost is also reduced.
Description
Technical field
The present invention relates to the catalyst technical field of selective catalytic reduction, especially a kind of drying means of honeycomb fashion denitration ceramic catalyst.
Background technology
In the process of thermal power plant's generating, can produce the flue gas that contains oxynitrides NOx, and oxynitrides NO
xbe one of primary pollution source causing at present atmosphere pollution, thermal power plant adopts selective catalytic reduction to reduce the pollution of nitrogen oxide more at present.Honeycomb fashion denitration ceramic catalyst is as one of core technology of selective catalytic reduction system, and its cost accounts for 30%-50% of denitrification apparatus gross investment conventionally.Wherein, drying means and the drying device of this catalyst in preparation process determined the dimensional stability of prepared honeycomb fashion denitration ceramic catalyst, thereby affects catalytic effect.The drying means of traditional honeycomb fashion denitration ceramic catalyst is to adopt the situation of controlling temperature and humidity to be dried next time, and energy consumption is large, drying time is long.Someone proposed to adopt the mode of microwave drying afterwards, and rate of drying is fast, effective, but treating capacity is little.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of drying means of honeycomb fashion denitration ceramic catalyst, and the drying means of this honeycomb fashion denitration ceramic catalyst can solve the problem that dry run energy consumption is large, drying time is long and treating capacity is little.
In order to address the above problem, the technical solution adopted in the present invention is: the drying means of this honeycomb fashion denitration ceramic catalyst, comprises and utilize drying device the first dry run that honeycomb fashion denitration ceramic catalyst is dried and the second dry run of utilizing drying device that described honeycomb fashion denitration ceramic catalyst is dried; Described drying device comprises drying unit, and described drying unit has air inlet and air outlet, and the drying unit of described the first dry run is hothouse, and the drying unit of described the second dry run is drying box;
Its dry run is as follows:
The first dry run:
A, honeycomb fashion denitration ceramic catalyst is positioned in hothouse;
B, by drying device, hot-air is sent in hothouse from the air intake vent of hothouse, keeping indoor temperature is 50 ℃～70 ℃, humidity is 45%～65%, the time is 4 days;
The second dry run:
A, the honeycomb fashion denitration ceramic catalyst of the first dry run gained is positioned in drying box;
B, by drying device, hot-air is sent into drying box from the air intake vent of drying box, keeping temperature in case is 100 ℃～120 ℃, until described honeycomb fashion denitration ceramic catalyst moisture content is less than 2%, obtains.
In the technical scheme of the drying means of above-mentioned honeycomb fashion denitration ceramic catalyst, technical scheme can also be more specifically: the air inlet of described drying unit is communicated with the air outlet of an air blast by magnetic valve, the air inlet of described air blast is communicated in the air outlet of an electric heater, the air inlet of described electric heater is communicated with the heating end outlet of a heat exchanger, and the heat source side import of described heat exchanger is communicated in the air outlet of drying unit; Described air blast, described magnetic valve and described electric heater are electrically connected to electric cabinet respectively.
Owing to having adopted technique scheme, the present invention compared with prior art has following beneficial effect:
1, the present invention adjusts temperature, humidity, pressure etc. according to actual conditions accurately by electric cabinet, makes prepared honeycomb fashion denitration ceramic catalyst inside and outside even and indeformable, reaches best drying effect; Automaticity is high, product quality is high.
2, the present invention has increased heat exchanger between the air outlet of drying unit and electric heater, will by heat exchanger, the cold air heat exchanger be heated from drying box steam out; Drying unit steam out becomes water from the heat source side outlet outflow of heat exchanger on the one hand, without waste gas, produces, and avoids contaminated environment; Air after heating enters drying unit again by circulating-heating on the other hand, takes full advantage of heat energy, has not only saved the energy, has also reduced production cost.
3, whole dry run loops, and drying capacity is strong, through the dry qualification rate of long-term experiment, reaches more than 91%.
Accompanying drawing explanation
Fig. 1 is the key wiring diagram of the embodiment of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing embodiment, the invention will be further described:
The drying means of this honeycomb fashion denitration ceramic catalyst, comprises and utilizes drying device the first dry run that honeycomb fashion denitration ceramic catalyst is dried and the second dry run of utilizing drying device that honeycomb fashion denitration ceramic catalyst is dried; As shown in Figure 1, drying device comprises drying unit 1, drying unit 1 has air inlet 1a and air outlet 1b, the air inlet 1a of drying unit 1 is communicated with the air outlet 3b of an air blast 3 by magnetic valve 2, the air inlet 3a of air blast 3 is communicated in the air outlet 4b of an electric heater 4, the air inlet 4a of electric heater 4 is communicated with the heating end outlet 5c of a heat exchanger 5, the heating end import 5b of heat exchanger 5 is communicated with atmosphere, the heat source side import 5a of heat exchanger 5 is communicated in the air outlet 1b of drying unit 1, and the heat source side outlet 5c of heat exchanger 5 is communicated in outdoor; Air blast, magnetic valve, electric heater are electrically connected to electric cabinet respectively; The drying unit of the first dry run is hothouse, and the drying unit of the second dry run is drying box;
Embodiment mono-
Its dry run is as follows:
The first dry run:
A, the honeycomb fashion denitration ceramic catalyst formed body of preparation is positioned in hothouse;
B, by air blast, air quantity is 4000m
3/ h, sends into hot-air in hothouse from the air intake vent of hothouse, and keeping indoor temperature is 50 ℃, and humidity is 65%, and the time is 4 days;
In this process, extrude the Free water in honeycomb fashion denitration ceramic catalyst honeycomb body, and taken away gradually;
The second dry run:
A, the honeycomb fashion denitration ceramic catalyst honeycomb body of the first dry run gained is positioned in drying box,
B, by air blast, hot-air is sent into drying box from the air intake vent of drying box, keeping temperature in case is 100 ℃, until described honeycomb fashion denitration ceramic catalyst moisture content is 2%, obtains.
When hot blast is through honeycomb fashion denitration ceramic catalyst honeycomb hole in this process, the adsorbed water remaining in its hole is progressively taken away, made the honeycomb fashion denitration ceramic catalyst honeycomb body of the first dry run further dry.
Embodiment bis-
Its dry run is as follows:
The first dry run:
A, the honeycomb fashion denitration ceramic catalyst formed body of preparation is positioned in hothouse;
B, by air blast, air quantity is 4000m
3/ h, sends into hot-air in hothouse from the air intake vent of hothouse, and keeping indoor temperature is 55 ℃, and humidity is 60%, and the time is 4 days;
In this process, extrude the Free water in honeycomb fashion denitration ceramic catalyst honeycomb body, and taken away gradually;
The second dry run:
A, the honeycomb fashion denitration ceramic catalyst honeycomb body of the first dry run gained is positioned in drying box,
B, by air blast, hot-air is sent into drying box from the air intake vent of drying box, keeping temperature in case is 105 ℃, until described honeycomb fashion denitration ceramic catalyst moisture content is 1.8%, obtains.
When hot blast is through honeycomb fashion denitration ceramic catalyst honeycomb hole in this process, the adsorbed water remaining in its hole is progressively taken away, made the honeycomb fashion denitration ceramic catalyst honeycomb body of the first dry run further dry.
Embodiment tri-
Its dry run is as follows:
The first dry run:
A, the honeycomb fashion denitration ceramic catalyst formed body of preparation is positioned in hothouse;
B, by air blast, air quantity is 4000m
3/ h, sends into hot-air in hothouse from the air intake vent of hothouse, and keeping indoor temperature is 60 ℃, and humidity is 55%, and the time is 4 days;
In this process, extrude the Free water in honeycomb fashion denitration ceramic catalyst honeycomb body, and taken away gradually;
The second dry run:
A, the honeycomb fashion denitration ceramic catalyst honeycomb body of the first dry run gained is positioned in drying box,
B, by air blast, hot-air is sent into drying box from the air intake vent of drying box, keeping temperature in case is 110 ℃, until described honeycomb fashion denitration ceramic catalyst moisture content is 1.5%, obtains.
When hot blast is through honeycomb fashion denitration ceramic catalyst honeycomb hole in this process, the adsorbed water remaining in its hole is progressively taken away, made the honeycomb fashion denitration ceramic catalyst honeycomb body of the first dry run further dry.
Embodiment tetra-
Its dry run is as follows:
The first dry run:
A, the honeycomb fashion denitration ceramic catalyst formed body of preparation is positioned in hothouse;
B, by air blast, air quantity is 4000m
3/ h, sends into hot-air in hothouse from the air intake vent of hothouse, and keeping indoor temperature is 65 ℃, and humidity is 50%, and the time is 4 days;
In this process, extrude the Free water in honeycomb fashion denitration ceramic catalyst honeycomb body, and taken away gradually;
The second dry run:
A, the honeycomb fashion denitration ceramic catalyst honeycomb body of the first dry run gained is positioned in drying box,
B, by air blast, hot-air is sent into drying box from the air intake vent of drying box, keeping temperature in case is 115 ℃, until described honeycomb fashion denitration ceramic catalyst moisture content is 1.7%, obtains.
When hot blast is through honeycomb fashion denitration ceramic catalyst honeycomb hole in this process, the adsorbed water remaining in its hole is progressively taken away, made the honeycomb fashion denitration ceramic catalyst honeycomb body of the first dry run further dry.
Embodiment five
Its dry run is as follows:
The first dry run:
A, the honeycomb fashion denitration ceramic catalyst formed body of preparation is positioned in hothouse;
B, by air blast, air quantity is 4000m
3/ h, sends into hot-air in hothouse from the air intake vent of hothouse, and keeping indoor temperature is 70 ℃, and humidity is 45%, and the time is 4 days;
In this process, extrude the Free water in honeycomb fashion denitration ceramic catalyst honeycomb body, and taken away gradually;
The second dry run:
A, the honeycomb fashion denitration ceramic catalyst honeycomb body of the first dry run gained is positioned in drying box,
B, by air blast, hot-air is sent into drying box from the air intake vent of drying box, keeping temperature in case is 120 ℃, until described honeycomb fashion denitration ceramic catalyst moisture content is 1.6%, obtains.
When hot blast is through honeycomb fashion denitration ceramic catalyst honeycomb hole in this process, the adsorbed water remaining in its hole is progressively taken away, made the honeycomb fashion denitration ceramic catalyst honeycomb body of the first dry run further dry.
Claims (2)
1. a drying means for honeycomb fashion denitration ceramic catalyst, is characterized in that: comprise and utilize drying device the first dry run that honeycomb fashion denitration ceramic catalyst is dried and the second dry run of utilizing drying device that described honeycomb fashion denitration ceramic catalyst is dried; Described drying device comprises drying unit (1), and described drying unit (1) has air inlet (1a) and air outlet (1b), and the drying unit of described the first dry run is hothouse, and the drying unit of described the second dry run is drying box;
Its dry run is as follows:
The first dry run:
A, honeycomb fashion denitration ceramic catalyst is positioned in hothouse;
B, by drying device, hot-air is sent in hothouse from the air intake vent of hothouse, keeping indoor temperature is 50 ℃～70 ℃, humidity is 45%～65%, the time is 4 days;
The second dry run:
A, the honeycomb fashion denitration ceramic catalyst of the first dry run gained is positioned in drying box;
B, by drying device, hot-air is sent into drying box from the air intake vent of drying box, keeping temperature in case is 100 ℃～120 ℃, until described honeycomb fashion denitration ceramic catalyst moisture content is less than 2%, obtains.
2. the drying means of honeycomb fashion denitration ceramic catalyst according to claim 1, it is characterized in that: the air inlet (1a) of described drying unit (1) is communicated with the air outlet (3b) of an air blast (3) by magnetic valve (2), the air inlet (3a) of described air blast (3) is communicated in the air outlet (4b) of an electric heater (4), the air inlet (4a) of described electric heater (4) is communicated with the heating end outlet (5c) of a heat exchanger (5), and the heat source side import (5a) of described heat exchanger is communicated in the air outlet (1b) of drying unit (1); Described air blast (3), described magnetic valve (2) and described electric heater (4) are electrically connected to electric cabinet respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310621949.9A CN104121769B (en) | 2013-11-30 | 2013-11-30 | The drying means of honeycomb fashion denitration ceramic catalyst |
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|---|---|---|---|
| CN201310621949.9A CN104121769B (en) | 2013-11-30 | 2013-11-30 | The drying means of honeycomb fashion denitration ceramic catalyst |
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| CN104121769A true CN104121769A (en) | 2014-10-29 |
| CN104121769B CN104121769B (en) | 2016-06-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596229A (en) * | 2015-02-12 | 2015-05-06 | 桐乡市田野机械科技有限公司 | Fresh chrysanthemum flower drying device |
| US20180273434A1 (en) * | 2017-03-24 | 2018-09-27 | Ngk Insulators, Ltd. | Method for drying columnar honeycomb formed body and method for producing columnar honeycomb structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988000678A1 (en) * | 1986-07-11 | 1988-01-28 | Max Wagner | Process and device for drying ceramic hollow bodies |
| US20020109269A1 (en) * | 2001-01-16 | 2002-08-15 | Denso Corporation | Method of fabricating honeycomb body and drying system |
| CN1845816A (en) * | 2003-09-02 | 2006-10-11 | 日本碍子株式会社 | Method and apparatus for drying honeycomb formed article |
| CN201731732U (en) * | 2010-07-09 | 2011-02-02 | 中钢集团洛阳耐火材料研究院有限公司 | Energy-saving fiber drying kiln |
| CN102345970A (en) * | 2011-08-31 | 2012-02-08 | 江苏峰业电力环保集团有限公司 | Denitration catalyst drying apparatus |
| CN102872919A (en) * | 2012-09-27 | 2013-01-16 | 浙江天蓝环保技术股份有限公司 | Preparation process of honeycomb SCR (selective catalytic reduction) denitration catalyst |
-
2013
- 2013-11-30 CN CN201310621949.9A patent/CN104121769B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988000678A1 (en) * | 1986-07-11 | 1988-01-28 | Max Wagner | Process and device for drying ceramic hollow bodies |
| US20020109269A1 (en) * | 2001-01-16 | 2002-08-15 | Denso Corporation | Method of fabricating honeycomb body and drying system |
| CN1845816A (en) * | 2003-09-02 | 2006-10-11 | 日本碍子株式会社 | Method and apparatus for drying honeycomb formed article |
| CN201731732U (en) * | 2010-07-09 | 2011-02-02 | 中钢集团洛阳耐火材料研究院有限公司 | Energy-saving fiber drying kiln |
| CN102345970A (en) * | 2011-08-31 | 2012-02-08 | 江苏峰业电力环保集团有限公司 | Denitration catalyst drying apparatus |
| CN102872919A (en) * | 2012-09-27 | 2013-01-16 | 浙江天蓝环保技术股份有限公司 | Preparation process of honeycomb SCR (selective catalytic reduction) denitration catalyst |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596229A (en) * | 2015-02-12 | 2015-05-06 | 桐乡市田野机械科技有限公司 | Fresh chrysanthemum flower drying device |
| US20180273434A1 (en) * | 2017-03-24 | 2018-09-27 | Ngk Insulators, Ltd. | Method for drying columnar honeycomb formed body and method for producing columnar honeycomb structure |
| US11168033B2 (en) * | 2017-03-24 | 2021-11-09 | Ngk Insulators, Ltd. | Method for drying columnar honeycomb formed body and method for producing columnar honeycomb structure |
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| CN104121769B (en) | 2016-06-15 |
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