CN1296146C - Method and equipment for coating slurry layer on cellular carrier of ceramics - Google Patents
Method and equipment for coating slurry layer on cellular carrier of ceramics Download PDFInfo
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- CN1296146C CN1296146C CNB2004100059209A CN200410005920A CN1296146C CN 1296146 C CN1296146 C CN 1296146C CN B2004100059209 A CNB2004100059209 A CN B2004100059209A CN 200410005920 A CN200410005920 A CN 200410005920A CN 1296146 C CN1296146 C CN 1296146C
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- ceramic honeycomb
- slurries
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Abstract
The present invention relates to a quantitative coating method for the surface serous fluid coating of ceramic honeycomb carriers. An automatically controlled clamp can fix the ceramic honeycomb carriers with many small hole passages to particular working positions, and an upper sealing device and a lower sealing device can seal periphery. A pipeline system can uniformly and quantitatively convey serous fluid required coated to the inner surfaces of the small hole passages of the ceramic honeycomb carriers via a negative pressure method for coating. Subsequently, redundant serous fluid is swept by a positive pressure method, and the serous fluid on the surfaces of the small hole passages of the carriers are uniformly distributed and quantitatively coated. The automation operation of the entire process is quantitatively completed.
Description
Technical field
The present invention relates to a kind of painting method of ceramic honeycomb carrier slurry coating.
The invention still further relates to a kind of device that is used to implement said method.
Background technology
People use the catalytic converter that arrives always, and the contact area of catalyst all as often as possible is provided, and method commonly used is catalyst carrier to be made the structure of band micropore, can improve the area of catalyst under certain volume like this.For ease of explanation, the exhaust catalytic converter that the present invention uses with automobile is that example is illustrated.In automobile exhaust gas purifying, adopt catalytic converter, be the method for present a kind of effective purifying contaminated thing of generally acknowledging, it can be effectively with the CO in the automobile exhaust, HC and NO
XBe converted into harmless object CO Deng venomous injurant
2, H
2O and N
2And wherein the activity of such catalysts thing all is to adopt to have on the ceramic honeycomb carrier inner surface of many little hole paths at present, applies slurries and catalyst activity thing and processes through roasting; The catalyst of the required chemical reaction high-specific surface area of automobile exhaust catalysis and purification is provided like this, thereby has improved the efficient of automobile exhaust catalysis and purification.
Present domestic most catalyst for catalytic purifying car tail gas manufacturer adopts the manual method manufacturing, and can not quantitatively apply, these class methods minimize metering method and have defective making to apply, slurries are coated to the outer surface of ceramic honeycomb carrier, cause the waste of slurries raw material, particularly expensive catalyst activity thing noble metal, problem is bigger during as applicator as platinum, palladium and rhodium.
Above-mentioned manual method is to be immersed in the liquid that contains slurries ceramic honeycomb carrier is whole, after after a while, again ceramic honeycomb carrier is taken out, the method that slurries unnecessary on the ceramic honeycomb carrier aperture is purged by compressed ir spray gun hand-manipulated again, can not make the thickness that obtains the even coating slurries that require on the little internal surface of hole of carrier, this painting method is difficult to accomplish quantitatively, equal uniformity of even product quality.
Summary of the invention
The object of the present invention is to provide a kind of painting method of ceramic honeycomb carrier slurry coating.
Another object of the present invention is to provide a kind of device that is used for said method.
Painting method provided by the invention adopts and applies negative-pressure adsorption coating procedure, malleation and purge the principle that unnecessary slurries and processes such as waterpower pipe blow-through and equipment hocket.
Painting method provided by the invention, it is coated with same thickness, coating is characteristics uniformly wherein to be contained in the ceramic honeycomb carrier each passage.Coating is meant that each passage of ceramic honeycomb carrier is evenly covered on its identical length uniformly, can control the coating homogeneous thickness more accurately.Coating uniformly is very important, can improve the efficient of catalytic converter.
Specifically, painting method provided by the invention, its key step is as follows:
A) ceramic honeycomb carrier is placed a sealed environment, the sealing environment is a vacuum state;
B) slurries are coated in each aperture of ceramic honeycomb carrier by the bottom absorption rising in the little duct of carrier, vacuum action lower edge;
C) carrier is dry under room temperature, roasting forms.
Painting method of the present invention, can also be after step b, remove redundant sizing agent on the carrier with the malleation purging, again ceramic honeycomb carrier is turned over turnback, slurries are still risen by the bottom absorption in the little duct of carrier, vacuum action lower edge be coated in each aperture of ceramic honeycomb carrier.
The device that is used to implement said method provided by the invention, it mainly comprises:
One upper outlet body is an end opening, the cavity of other end sealing; This blind end is connected with guide rod, and this guide rod is connected with a cylinder; The blind end of upper outlet body is separately installed with a malleation nozzle, a water inlet and a negative pressure and takes out mouth, and this malleation nozzle is connected with compressed air, and this water inlet is connected with water pump, and this negative pressure is taken out mouth and is connected with a vavuum pump;
One lower cover is the cavity of end opening other end sealing, and this lower cover blind end inside is equipped with a butterfly valve; The blind end of lower cover is connected with a slurries recycling can; One side of this lower cover is provided with a charging aperture and is connected with serum pot;
The upper outlet body openend is downward, and the lower cover openend up is installed on the vertical axis; Wherein the guide rod subject cylinder control of upper outlet body connection drives upper outlet body and relatively moves up and down;
By said apparatus:
A) start cylinder, by guide rod upper outlet body is separated, ceramic honeycomb carrier is packed in the upper outlet body;
B) restart cylinder and upper outlet body is descended, compress carrier, and form a seal chamber with the lower cover sealing by guide rod;
C) open vavuum pump, the cavity that upper and lower cover body is synthetic is pumped into negative pressure, and the slurries in the serum pot are under suction function, and rising along the bottom absorption in the little duct of carrier through the charging aperture of lower cover is coated in each aperture of carrier;
D) close serum pot, start compressed air, open butterfly valve, compressed air enters seal chamber through the malleation nozzle, purges and removes redundant sizing agent on the carrier, and this slurry flow to the slurries recycling can through butterfly valve;
E) start cylinder and open upper outlet body, carrier is turned over turnback, repeating step b is to steps d again;
F) start cylinder and open upper outlet body, take out carrier;
G) open water pump, the water source washes upper and lower cover body inside and slurry pipeline through water inlet.
In the described device, the packing into, overturn and take out of carrier by a Robot actions.
In the described device, between the malleation nozzle and compressed air of upper outlet body, between water inlet and the water pump, negative pressure is taken out mouthful and vavuum pump between, between lower cover blind end and the slurries recycling can and all respectively be provided with a solenoid control between charging aperture and the serum pot.
In the described device, the whole operation process is controlled by an electrical control cabinet.
In the described device, the malleation nozzle in the upper outlet body is provided with the sheet nozzle of rotation.
The present invention is combined in the application process of negative pressure, compressed air, rinse water on the device, with the staggered method that applies, realized that ceramic honeycomb carrier has identical homogeneous thickness and weight along slurries coated on the little hole path, this plays important effect for the quality and the clean-up effect that improve catalyst, owing to realized automatic coating, can carry out accurately control to the complexor that is coated with of slurries, this production and research for catalyst is all very favourable; In addition, also with convenient, be used in the automotive exharst gas catalytic converter, will have better changing effect, like this environmental protection is had positive meaning with the method production and coated ceramic honeycomb substrate catalyst for the management of producing.
Description of drawings
In the accompanying drawings, similar sign is represented similar parts, and accompanying drawing is used for embodiments of the invention, and not as restriction of the present invention, and the present invention is limited by the claims as the part of the present patent application.
Fig. 1 is the structural representation of the quantitative coating unit of ceramic honeycomb carrier slurry coating of the present invention.
Fig. 2 is the profile schematic diagram of the coating unit of the embodiment of the invention.
Fig. 3 is that face figure is compared in the effect signal of embodiment of the invention ceramic honeycomb carrier coating, and a is the enlarged diagram that applies pre-ceramic honeycomb substrate aperture among the figure; B is the enlarged diagram that applies back carrier aperture.
The specific embodiment
The used coating of the present invention can be decided on the catalytic converter purposes of preparation.The catalytic converter that present embodiment is still used with vehicle exhaust is that example is described.Need to prove that painting method of the present invention and device are not only limited to and are used for preparing the catalytic-converter substrate that vehicle exhaust is used, and have microcellular structure but can be used for all, and the carrier that need apply the micropore inwall.
Embodiment: the alumina coated slurry formula is 2kg one a water aluminium oxide powder, adds 3250-3650ml H
2O and 550ml red fuming nitric acid (RFNA) are put in ball milling 6-15h in the ball mill, and obtaining slurries pH is 3-5, proportion 1.20-1.35, and viscosity is the 40-70 centipoise.Do not stir slurries in the 24h and can not produce precipitation.
The ceramic honeycomb carrier specification that present embodiment is used:
Φ 100 * 100mm, 400 holes/in
2Wall thickness 0.18-0.21mm; Water absorption rate 23-26%;
The basic structure of coating unit is seen Fig. 1 and Fig. 2.
Need between each parts in the device of the present invention to transmit and be pipeline being connected of gas, water and slurries and connect, this pipeline can be metallic conduit, as stainless steel etc.; Also can be the pipeline that high-molecular organic material is made, as polytetrafluoroethylene (PTFE) etc.Its pipe diameter can be decided according to the specification size of device.
Core apparatus of the present invention is the seal chamber of being made up of upper outlet body 10 and lower cover 20 among Fig. 1.This upper and lower cover body 10 and 20 is an end opening, other end sealing, thus form a container-like cavity.The openend of upper outlet body 10 is downward, the openend of lower cover 20 up is installed in-vertical axis on, the back that engages one another forms a seal chamber, the ceramic honeycomb carrier 30 that needs to apply slurry just places the sealing cavity.Apply for increasing effect, laying of ceramic honeycomb carrier 30 is that micropore by in the ceramic honeycomb carrier is placed vertically in cavity.
The blind end of upper outlet body 10 is connected with: malleation nozzle 11, negative pressure are taken out mouth 12 and water inlet 13.Wherein malleation nozzle 11 is connected with a compressed air, and its effect is the slurry that is blown in seal chamber in the air purge cavity, and for improving cleaning performance, malleation nozzle 11 is provided with revolvable sheet nozzle 11a.Negative pressure is taken out mouthfuls 12 and is connected with a vavuum pump 12a, and its effect is to be pumped into negative pressure in the seal chamber.Water inlet 13 is connected with a water source, and this water source can be a water pump or running water pipe etc., and its effect is pipeline valve and the equipment that cleans the contact slurry with clear water.Above-mentioned malleation nozzle 11, negative pressure take out mouthfuls 12 and water inlet 13 all respectively be provided with a valve 111,121 and 131, in seal chamber, import compressed air respectively, vacuumize or operation such as cleaning in order to control.
By the blind end place one butterfly valve 21 is installed in lower cover 20 cavitys, the side that lower cover 20 is positioned at butterfly valve 21 tops is provided with a charging aperture, and this charging aperture connects a certain amount of pump 23 by a valve 231, and this constant displacement pump 23 is connected with slurries holding vessel 24.Blind end is connected to a slurries recycling can 22 by a valve.This butterfly valve 21 when ceramic honeycomb carrier is applied slurries for closing; When applying end, this butterfly valve 21 is opened, and recycles so that unnecessary slurries send back to slurries holding vessel 24 through slurries accumulator tank 22, and water cleans then.
The above is major technique of the present invention place.Except that said apparatus, the present invention also is provided with:
One manipulator 40 is used for installing, overturns and the taking-up ceramic honeycomb carrier.In the device of the actual use of the present invention, this manipulator 40 is installed on the frame with the cylinder 40a of this manipulator 40 of control, can laterally move.
One slurry flow metering device 41 is installed on the slurry storage tank 24, is used to monitor and control the flow of slurries.
One vacuum tank 42, the negative pressure that is serially connected in upper outlet body 10 is taken out between mouth 12 and the vavuum pump 12a, is used for stablizing the negative pressure value in the cavity.
One flow separation jar 44 is connected to after the slurries recycling can 22, is used for the slurries that reclaim are separated.
One electrical control cabinet 45 is used to control the automatic running of the whole device of the present invention.Switch board is mainly by the FX of Mitsubishi
2N-48MR Programmable Logic Controller (PLC), the electrodeless speed control of electronics and control transformer are formed.
The guidance panel of switch board comprises startup, suddenly stop, manually, automatically, reset, clean switching, speed governing, purge time, various operations of manipulator and various manual operation (vavuum pump, stirring, rotation purge, apply switches such as cylinder, switch cylinder, angle pedestal valve, vavuum pump, blow down valve) button; Rotation be can control and rotating speed, purge time and Robot actions etc. purged.
During concrete enforcement, switch board can carry out manually and automatically switch: during manual operation, rotatable hand push button carries out the action of manipulator and each cylinder valve; When operating automatically, each hand push button is placed on zero-bit, stirring motor, electric rotating machine, vavuum pump button forward automated location to, press start button, can carry out whole-process automatic operation.
As for settings such as various buttons on the panel, those skilled in the art are appreciated that according to its function separately and implement, so the present invention does not have to do too concrete description here.
The used valve of the present invention is a magnetic valve, can be subjected to the control of electrical control cabinet 45.
By said apparatus, coating procedure of the present invention is:
1) manipulator 40 is put into ceramic honeycomb carrier 30 position of A in the cavity by cylinder 40a control;
2) upper outlet body 10 (wherein being provided with revolvable sheet nozzle) is driven by linkage 14 and descends, and compresses ceramic honeycomb carrier 30, and linkage 14 makes lower cover 10,20 keep sealing state simultaneously;
3) magnetic valve 121 is opened, and vavuum pump is opened, and vacuumizes between the seal chamber with last lower cover formation, reach setting vacuum, general auto-exhaust catalyst carrier pearl negative pressure value is adjustable in the 0.3-0.7kPa scope, and the negative pressure retention time is adjustable in 10s, closes magnetic valve 121 then;
4) constant displacement pump 23 carries slurries to quantitative pot 43, and is generally adjustable in the 100-600ml scope, and magnetic valve 231 is opened simultaneously, carries out slurries and applies, and carries slurries to finish, and magnetic valve 231 cuts out;
5) butterfly valve 21 is opened, and simultaneously magnetic valve 111 is opened, and by air compressor supply air ceramic honeycomb carrier is purged unnecessary slurries, and it is adjustable in the 0.3-0.6MPa scope generally to purge the malleation value, and it is adjustable in the 8-15s executing purge time;
6) upper outlet body 10 is upwards promoted by linkage 14, after 180 ° of manipulator 40 clamping ceramic honeycomb carriers 30 upsets, puts back to original position.Upper outlet body 10 descends and compresses ceramic honeycomb carrier, makes the sealing of lower cover and sealing device simultaneously.Repeat (3), (4) and (5) operating procedure, the ceramic honeycomb carrier other end is applied slurries, so realize even, the quantitative coating procedure of an integral body (full-scale) ceramic honeycomb carrier;
7) manipulator 40 blankings finish to apply;
8) will apply the 6-12h that dries in the shade under the ceramic honeycomb carrier room temperature of back; 400-450 ℃ of oven dry 3-5h obtains even, quantitative coating Al
2O
3The ceramic honeycomb carrier product of coating;
9) calculate Al with following formula
2O
3The rate of uploading (representing) with mass percent:
10) apply end opens solenoid valve 131 and make pipeline, valve and the equipment of all contact slurries all can contact cleaning device for transferring system with water, scavenging period is 10-15min.12 magnetic valves are in closed condition all the time in the coating procedure;
11) Fig. 3 has shown the generalized section of ceramic honeycomb carrier coating front and back.Can see obviously that applying back each aperture of carrier has identical and uniform clear figure.
The present invention has realized that ceramic honeycomb carrier applies the quantitative control of slurries and the automatic control of whole device, guarantees the even coating of each aperture channel surface sizing liquor in the ceramic honeycomb carrier, can prevent coating crack performance at high temperature.Solved simultaneously spray time requirement, spraying slurries configuration, storage, metering, arbitrary way and problem such as how to regulate.
Can produce high performance ceramic honeycomb carrier catalyst according to the quantitative painting method and the device of ceramic honeycomb carrier slurry coating used in the present invention, can be bigger the raising benefit of producing and the quality of product.In addition, the present invention can also be used for the quantitative coating of ceramic honeycomb carrier catalyst solution active coating except the quantitative coating that is used for the ceramic honeycomb carrier slurry coating, also can be used in the middle of the similar production of other industry.
Need to prove that the parts that device provided by the invention adopted are the existing product that those skilled in the art are familiar with, the present invention just utilizes the original function of these existing procucts, assembles, thereby realizes purpose of the present invention.Therefore, those skilled in the art are not difficult to realize this device according to description of the invention.
Claims (6)
1. the quantitative painting method of a ceramic honeycomb carrier slurry coating, its key step is as follows:
A) ceramic honeycomb carrier is placed a sealed environment, the sealing environment is a vacuum state;
B) slurries are coated in each aperture of ceramic honeycomb carrier by the bottom absorption rising in the little duct of carrier, vacuum action lower edge;
C) carrier is dry under room temperature, roasting forms.
2. painting method according to claim 1, it is characterized in that, after the step b, remove redundant sizing agent on the ceramic honeycomb carrier with the malleation purging, again ceramic honeycomb carrier is turned over turnback, slurries are still risen by the bottom absorption in the little duct of carrier, vacuum action lower edge be coated in each aperture of ceramic honeycomb carrier.
3. device of realizing claim 1 or 2 described methods, it mainly comprises:
One upper outlet body is the cavity of end opening other end sealing; This blind end is connected with guide rod, and this guide rod is connected with a cylinder; The blind end of upper outlet body is separately installed with a malleation nozzle, a water inlet and a negative pressure and takes out mouth, and this malleation nozzle is connected with compressed air, and this water inlet is connected with water pump, and this negative pressure is taken out mouth and is connected with a vavuum pump;
One lower cover is the cavity of end opening other end sealing, and this lower cover blind end inside is equipped with a butterfly valve; The blind end of lower cover is connected with a slurries recycling can; One side of this lower cover is provided with a charging aperture and is connected with the slurries holding vessel;
The upper outlet body openend is downward, and the lower cover openend up is installed on the vertical axis; Wherein the guide rod subject cylinder control of upper outlet body connection drives upper outlet body and relatively moves up and down;
One manipulator is used for installing, overturns and the taking-up carrier, is installed on the frame, can laterally move;
One slurry flow metering device is installed on the slurry storage tank, is used to monitor slurry flow;
One vacuum tank, the negative pressure that is serially connected in upper outlet body is taken out between mouth and the vavuum pump, is used for stablizing negative pressure value in the cavity;
Certain measuring tank is serially connected with between the charging aperture and constant displacement pump of lower cover, with the inlet amount of stable slurry;
One flow separation jar is connected to after the slurries recycling can, is used for the slurries that reclaim are separated;
One electrical control cabinet is used to control the running of whole device.
4. device according to claim 3 is characterized in that, the malleation nozzle in the upper outlet body is provided with the sheet nozzle of rotation.
5. device according to claim 3, it is characterized in that, between the malleation nozzle and compressed air of upper outlet body, between water inlet and the water pump, negative pressure is taken out mouthful and vavuum pump between, between lower cover blind end and the slurries recycling can and all respectively be provided with a by-pass valve control between charging aperture and the serum pot.
6. device according to claim 5 is characterized in that, described by-pass valve control is a magnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100059209A CN1296146C (en) | 2004-02-24 | 2004-02-24 | Method and equipment for coating slurry layer on cellular carrier of ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100059209A CN1296146C (en) | 2004-02-24 | 2004-02-24 | Method and equipment for coating slurry layer on cellular carrier of ceramics |
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| CN1660508A CN1660508A (en) | 2005-08-31 |
| CN1296146C true CN1296146C (en) | 2007-01-24 |
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| CNB2004100059209A Expired - Fee Related CN1296146C (en) | 2004-02-24 | 2004-02-24 | Method and equipment for coating slurry layer on cellular carrier of ceramics |
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| WO2009108156A1 (en) * | 2008-02-29 | 2009-09-03 | Corning Incorporated | Method and apparatus for aligning a support with respect to a honeycomb body |
| US20100304041A1 (en) * | 2009-05-29 | 2010-12-02 | Tonia Havewala Fletcher | Method For Coating Honeycomb Bodies |
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| CN108745773B (en) * | 2018-08-21 | 2023-08-01 | 常州机电职业技术学院 | Ternary catalyst carrier coating device |
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| CN112570214A (en) * | 2020-11-26 | 2021-03-30 | 娄底市安地亚斯电子陶瓷有限公司 | Coating device for precise ceramic hole slurry and processing method thereof |
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| CN114433413A (en) * | 2022-01-06 | 2022-05-06 | 中自环保科技股份有限公司 | Honeycomb carrier ration is given thick liquid coating equipment |
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| CN1660508A (en) | 2005-08-31 |
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