CN112264231A

CN112264231A - Surface coating device for pipe fitting

Info

Publication number: CN112264231A
Application number: CN202011040020.3A
Authority: CN
Inventors: 陈建军; 单良; 李俊华; 尹荣强; 陈公达; 徐杰; 王志强
Original assignee: Yancheng Environment Engineering Technology Research And Development Center Tsinghua University
Current assignee: Yancheng Environment Engineering Technology Research And Development Center Tsinghua University
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-01-26
Anticipated expiration: 2040-09-28
Also published as: CN112264231B

Abstract

The invention discloses a surface coating device for a tubular part, which comprises a coating box body, a material storage unit and a power transmission unit which are arranged outside the coating box body, and a tubular part fixing rotating mechanism and a spraying unit which are arranged inside the coating box body; wherein the power transmission unit is connected with the material storage unit and the spraying unit and is used for realizing the input of the coating slurry into the spraying unit in the form of wide flow and wide pressure flow. The device provided by the invention enables the catalytic component to permeate into the porous pores of the pipe by controlling the flow and pressure of slurry, so that the surface and pore surfaces of the pipe are uniformly coated with the catalytic component, the loading capacity of the catalytic component can be effectively controlled, and the device is also suitable for coating multiple catalytic components.

Description

Surface coating device for pipe fitting

Technical Field

The invention belongs to the field of coating devices, and particularly relates to a surface coating device for a tubular part.

Background

With the rapid industrialization of China, dust (PM) and Nitrogen Oxide (NO)_x) When the total amount of the discharged atmospheric pollutants is high and difficult, dust-haze events frequently occur, and unconventional pollutants such as dioxin in smoke can cause great harm to human bodies directly, so that the method for winning atmospheric pollution prevention and treatment and fighting against hardness becomes a great strategic demand in China.

The industrial furnace kiln in China has the characteristics of multiple types, large quantity, complex pollutant components and the like, the dust removal and denitration units are connected in series and independently operated in the traditional industrial flue gas purification process at present, the process equipment has large scale and high investment, operation and maintenance cost, is difficult to adapt to the complex and variable flue gas conditions of the industrial furnace kiln, and has poor dioxin removal effect. Therefore, the development of a multi-pollutant synergetic removal material and technology with low cost, short flow and high adaptability becomes a new direction for the development of the industrial flue gas purification field. Wherein, the integrated technology of coupling the filtering material as the matrix and the catalytic active component becomes a new technology with better application prospect which is widely concerned at home and abroad.

Based on the above situation, how to combine the catalytic active component and the filter material efficiently and reliably becomes an important research field, but the related research is still in the beginning stage, and the related devices are more rarely reported.

Disclosure of Invention

In response to the lack of equipment for coating materials with catalytic active components on tubular filter elements in the prior art, the invention provides a universal surface coating device for tubular parts.

The technical purpose is achieved, the technical effect is achieved, and the invention is realized through the following technical scheme:

a surface coating device for a tubular part comprises a coating box body, a material storage unit and a power transmission unit which are arranged outside the coating box body, and a tubular part fixing and rotating mechanism and a spraying unit which are arranged inside the coating box body; the power transmission unit is connected with the material storage unit and the spraying unit and is used for inputting the coating slurry into the spraying unit at a flow speed of 0.1-10L/min under the condition of 0.01-0.5 MPa of pressure.

As a further improvement of the present invention, the power transmission unit comprises a plurality of power pumps connected in parallel, the input ends of the power pumps are connected with the output ends of the material storage unit, and the output ends of the power pumps are connected with the input ends of the injection units through electromagnetic valves connected in series in a one-to-one correspondence. The combined power pump is adopted as required, so that the flow speed can be regulated as required under the condition of ensuring high-pressure output, and the conditions of different coating thicknesses can be realized on the premise of ensuring that the slurry fully permeates into the inner layer of the pipe-shaped part.

As a further improvement of the invention, the output power of the power pumps is the same or different, and the output power of the power pumps is 50-500W; and at least one open electromagnetic valve is included during the coating operation.

Preferably, the power transmission unit adjusts the flow rate to change within the range of not less than 0.5L-10L/min under the pressure condition of 0.1-0.3 MPa.

As a further improvement of the invention, the fixed rotating mechanism for the tubular part comprises a rotating clamping piece and a bracket, wherein the rotating clamping piece is arranged at the front end and the rear end of the coating box body and clamps the end face of the tubular part, and the bracket is arranged in the middle of the box body and is in contact with the side wall of the tubular part;

the power transmission unit further comprises a rotating motor connected with the rotating clamping piece, the rotating motor comprises two output ends, rotating supports arranged on the outer side of the coating box body are respectively connected with the rotating clamping piece, and the rotating clamping pieces on the two sides are driven to rotate synchronously.

As a further improvement of the invention, the spraying unit is arranged inside the tubular part and comprises at least one guide rod arranged parallel to the tubular part, and at least one nozzle is connected to the guide rod along the length direction of the guide rod; and during spraying, the guide rod moves in parallel or does not move along the length direction of the pipe-shaped piece.

As a further improvement of the invention, the guide rods are arranged in equal length, and at least one nozzle is connected to the guide rods along the length direction of the guide rods; or the guide rods are arranged in unequal lengths, and the top ends of the guide rods are connected with one nozzle.

As a further development of the invention, a spray unit arranged outside the tube-shaped element is also included or excluded.

As a further improvement of the invention, the device also comprises a cleaning and waste liquid storage unit which is connected with the coating box body, the material storage unit, the power transmission unit, the fixed rotating mechanism and the spraying unit through pipelines and control valves and is used for cleaning the device.

As a further improvement of the invention, the control unit is electrically connected to any of the units and controls the operating parameters according to settings.

The invention has the beneficial effects that: the device provided by the invention enables the catalytic component to permeate into the porous pores of the pipe by controlling the flow and pressure of slurry, so that the surface and pore surfaces of the pipe are uniformly coated with the catalytic component, the loading capacity of the catalytic component can be effectively controlled, and the device is also suitable for coating multiple catalytic components.

Drawings

FIG. 1 is a schematic diagram of the apparatus arrangement of the present invention;

FIG. 2 is a schematic structural view of a power transmission unit;

FIG. 3 is a schematic view of the arrangement of the first embodiment of the ejection unit;

FIG. 4 is a schematic view of the arrangement of a second embodiment of the ejection unit;

FIG. 5 is a schematic view of the arrangement of a third embodiment of the ejection unit;

FIG. 6 is a schematic cross-sectional view of the spray unit;

FIG. 7 is a sectional view of a ceramic fiber integrated catalytic filter tube according to embodiment 1 of the present invention

FIG. 8 is a sectional view of a ceramic fiber integrated catalytic filter tube according to embodiment 2 of the present invention

FIG. 9 is a cross-sectional view of a ceramic fiber monolithic catalytic filter tube according to embodiment 3 of the present invention

Fig. 10 is a second cross-sectional view of the ceramic fiber integrated catalytic filter tube according to embodiment 3 of the present invention: the automatic cleaning device comprises a material storage container, a power transmission unit, a power pump 200, an electromagnetic valve 201, a weighing table 3, a weight sensor 4, a spraying unit 5, a guide rod 501, a nozzle 502, a bracket 6, a rotary support 7, a coating box 8, a control valve 9, a rotary clamping piece 10, a cleaning pump machine 11, a cleaning solution storage tank 12, a PLC (programmable logic controller) 13, a waste solution tank 14 and a rotary motor 15.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.

The overall layout of the surface coating device for the pipe-shaped part as shown in fig. 1 comprises a coating box body 8, a material storage unit and a power transmission unit 2 which are arranged outside the coating box body 8, and a pipe-shaped part fixing and rotating mechanism and a spraying unit 5 which are arranged inside the coating box body 8; wherein the power transmission unit 2 is connected with the material storage unit and the spraying unit 5 and is used for realizing the input of the coating slurry into the spraying unit 5 in the form of wide flow and wide pressure flow.

The material storage unit comprises a storage container 1 filled with catalytic active component slurry, and the storage container 1 is a container with an adjustable stirrer and a constant temperature device inside. The automatic slurry storage device is characterized by further comprising a weighing platform 3, wherein the storage container 1 is placed above the weighing platform 3, and a weight sensor 4 is arranged in the weighing platform 3 and used for monitoring the residual amount of slurry in the storage container 1.

The power transmission unit 2 includes a plurality of power pumps connected in parallel, as shown in fig. 2, and each power pump is numbered from 1 to N. The input end of the power pump is connected with the output end of the material storage unit, the output end of the power pump 200 is connected with the input end of the injection unit 5 through the electromagnetic valves 201 which are connected in series in a one-to-one correspondence mode, and the serial numbers of the electromagnetic valves 201 correspond to the power pumps 200 which are correspondingly connected.

The power pump 200 can be a circulating pump, a constant flow pump or other pumps. The output power of the power pump 200 is the same or different, and the output power of the power pump is 50-500W; during the coating operation, at least one open solenoid valve 201 is included. And finally, the slurry is input into the spraying unit 5 at the flow speed of 0.1-20L/min and the pressure of 0.01-0.5 MPa under the regulation action of the power transmission unit 2. The power pumps connected in parallel in the power transmission unit can be used for realizing the adjustment of different flow speeds on the premise of ensuring high pressure, so that the coated slurry can be ensured to fully permeate into the inner layer of the tube layer, and the adjustment of different permeation thicknesses is realized.

The fixed rotary mechanism of cast spare is including setting up in coating box 8 both ends centre gripping pipe type spare terminal surface's rotatory holder 10 and setting are in the middle of the box with the bracket 6 that the cast spare lateral wall contacted. The corresponding power transmission unit also comprises a rotating motor 15 connected with the rotating clamping piece 10, wherein the rotating motor 15 comprises two output ends, the rotating motor is respectively connected with the rotating clamping piece 10 through a rotating bracket 7 arranged on the outer side of the coating box body, the rotating clamping pieces 10 on the two sides are driven to synchronously rotate, and the clamped pipe-shaped piece is driven to rotate at the rotating speed of 15-200 r/min.

The spraying units 5 are arranged inside the pipe-shaped member, and can also be arranged on the inner side and the outer side of the pipe-shaped member. The device comprises at least one flow guide rod 501 arranged in parallel with the tubular part, and at least one nozzle 502 is connected on the flow guide rod 501 along the length direction of the flow guide rod 501; during spraying, the guide rods 501 move in parallel along the length direction of the pipe-shaped member.

As shown in fig. 3-6, the arrangement of the tube members includes a variety of situations:

for example, the guide rod 501 is arranged with equal length, and at least one nozzle 502, preferably 5-10 nozzles 502, is connected to the guide rod 501 along the length direction of the guide rod 501. Or, the same side includes a plurality of diversion rods 501 with different lengths, and the top end of the diversion rod 501 is connected with one nozzle 502.

The device is characterized by further comprising a cleaning and waste liquid storage unit, wherein the cleaning and waste liquid storage unit is connected with the coating box body 8, the material storage unit, the power transmission unit 2, the fixed rotating mechanism and the spraying unit 5 through a pipeline and a control valve 9 and is used for cleaning the device. The specific cleaning and waste liquid storage unit comprises a cleaning liquid storage tank 12 and a waste liquid tank 14, and is connected with the storage container 1 and the coating box body 8 through a cleaning liquid pipeline and a control valve 9, in the cleaning process, the corresponding control valve 9 is opened, under the action of a cleaning pump 11, the cleaning liquid passes through the storage container 1 and the coating box body 8 and simultaneously cleans a pipeline system (such as the power transmission unit 2) connected with the storage container and the coating box body and other equipment arranged in the storage container and the coating box body, and the cleaned waste liquid flows back to the waste liquid tank 14 to be collected.

The control unit is electrically connected with any one of the units and controls the operation parameters according to the setting. The device comprises a PLC (programmable logic controller) control computer 13, wherein a program for controlling the operation of the device is built in the PLC control computer 13 and is connected with each part of the device through a signal wire.

The device can be used for coupling catalytic active components on various tubular materials, is particularly suitable for pipe fittings with a micropore structure, and can load various catalytic components, thereby realizing the integrated removal of dust, nitrogen oxide, dioxin, mercury and other pollutants.

The specific operation steps are as follows:

the method comprises the following steps: equipment installation preparation work

Ceramic fiber tubular filter materials are selected as tubular parts to be coated, and the ceramic fiber tubes are fixed in the coating box body 8 through the tubular part fixing and rotating mechanism.

The injection system is arranged as a centrally located guide rod 501, the injection mode is that the injection is from the center to the inner wall of the pipe, and the slurry permeates from the inner wall to the outer wall of the pipe. The nozzles 502 are uniformly arranged along the length direction of the guide rod 501, and the opening sizes of the nozzles 502 are distributed in a gradient manner along the length direction. The number of the sub guide rods 501 is suitable for the arrangement of the nozzles 502. The layout is shown in fig. 3 and 4.

Step two: coating with catalytically active components

Example 1: coated denitration catalytic active component

1.1, injecting sufficient denitration catalytic activity component slurry into a storage container 1, wherein the solid content of the slurry is adjusted to be 5-40%, and the preferable content is 12-18%.

1.2, starting the power pump No. 200-1 and the corresponding electromagnetic valve 201-1, wherein the power pump No. 200-1 is a high-power centrifugal pump, and adjusting the output flow of the slurry to be 3L/min and the pressure to be 0.1 Mpa.

1.3 spraying for 2-4 min at a rotation speed of 40-60 r/min.

1.4 taking down the wet ceramic fiber tubular filter material after coating, repeating the steps 1.2 and 1.3, carrying out batch production, and then intensively drying and calcining.

The cross section of the product prepared in example 1 is shown in fig. 7, and the loading rate of the catalyst is 5-20%.

Example 2: coated denitration catalytic active component

The same as example 1, except that the power transmission unit 2 in step 1.2 is opened 200-2, 200-3, 200-4 and the corresponding electromagnetic valve, the power pump is a low-flow constant-flow pump, the output flow of the slurry is adjusted to 0.5+0.5+ 0.5-1.5L/min, and the pressure is 0.2 Mpa. The rotating speed of the step 1.3 is 20-50 r/min, and the spraying time is 1-4 min.

The cross section of the product prepared in example 1 is shown in fig. 8, and the loading rate of the catalyst is 5-10%.

Example 3: coating dual catalytic components

1.1 sufficient denitration catalytic active components with the solid content of 5-20%, preferably 5-15% and sufficient oxidation catalytic active component slurry with the solid content of 2-40%, preferably 10-25% and capable of removing pollutants such as dioxin, mercury and the like are respectively placed in two storage containers 1.

1.2 coating denitration catalytic active components according to the following process conditions: starting a No. 200-2 power pump and a corresponding electromagnetic valve 201-2, starting an external guide rod, and adjusting the output flow of the slurry to be 0.5L/min and the pressure to be 0.2 Mpa; the rotating speed of the rotating mechanism is 50-150 r/min, and the spraying operation is carried out for 4-6 min.

1.3, drying, wherein the section of the prepared product coated with the denitration catalytic active component is shown in fig. 9, and the loading rate of the denitration catalyst is 2-10%.

1.4, putting the pipe-shaped component coated with the denitration catalytic active component into a coating box body 8 again, communicating the device with a storage container 1 filled with a component II, and coating a second catalytic component according to the following process conditions: starting a No. 200-3 power pump and a corresponding electromagnetic valve 201, opening a flow guide rod in the pipe, and adjusting the output flow of the slurry to be 0.5L/min and the pressure to be 0.3 Mpa; the rotating speed of the rotating mechanism is 20 to 50r/min, and the spraying operation is carried out for 1 to 4 min.

1.5 drying, wherein the section of the prepared product with the double-layer active components is shown in figure 10, and the loading rate of the oxidation catalyst is 2-10%.

And (3) performance testing:

and (3) testing conditions are as follows:

1. testing the catalytic effect of the coating piece under the pressure drop of lower than 500Pa and 350Pa in the temperature range of 180-350 ℃ at the filtering speed of 0.5-1.2 m/min;

2. NO in industrial waste gas_xThe concentration of (2) was 500ppm, and the concentration of dioxin (chlorobenzene as a simulant) was 100 ppm.

And (3) testing results:

therefore, the pipe-shaped part with the surface coated with the catalytic component, which is manufactured by adopting the device disclosed by the invention, can effectively carry out catalytic decomposition on the industrial waste gas.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A surface coating apparatus for a tubular article, characterized by: the coating device comprises a coating box body, a material storage unit and a power transmission unit which are arranged outside the coating box body, and a pipe type piece fixing and rotating mechanism and a spraying unit which are arranged inside the coating box body; the power transmission unit is connected with the material storage unit and the spraying unit and is used for inputting the coating slurry into the spraying unit at a flow speed of 0.1-20L/min under the condition of pressure of 0.01-0.5 MPa.

2. A surface coating apparatus for a tubular article as claimed in claim 1, wherein: the power transmission unit comprises a plurality of power pumps connected in parallel, the input ends of the power pumps are connected with the output ends of the material storage units, and the output ends of the power pumps are connected with the input ends of the injection units through electromagnetic valves which are in one-to-one correspondence and connected in series.

3. A surface coating apparatus for a tubular article as claimed in claim 2, wherein: the output power of the power pumps is the same or different, and the output power of the power pumps is 50-500W; and at least one open electromagnetic valve is included during the coating operation.

4. A surface coating apparatus for a pipe member according to any one of claims 1 to 3, wherein: the power transmission unit adjusts the flow speed to change within the range of 0.5L-10L/min under the pressure condition of 0.1-0.3 MPa.

5. A surface coating apparatus for a tubular article as claimed in claim 1, wherein: the tubular part fixing and rotating mechanism comprises a rotating clamping piece and a bracket, wherein the rotating clamping piece is arranged at the front end and the rear end of the coating box body and is used for clamping the end faces of the tubular part, and the bracket is arranged in the middle of the box body and is contacted with the side wall of the tubular part;

6. A surface coating apparatus for a tubular article as claimed in claim 1, wherein: the spraying unit is arranged inside the tubular part and comprises at least one guide rod arranged in parallel with the tubular part, and at least one nozzle is connected to the guide rod along the length direction of the guide rod; and during spraying, the guide rod moves in parallel or does not move along the length direction of the pipe-shaped piece.

7. A surface coating apparatus for a tubular article as claimed in claim 6, wherein: the guide rods are arranged in equal length, and at least one nozzle is connected to the guide rods along the length direction of the guide rods;

or the guide rods are arranged in unequal lengths, and the top ends of the guide rods are connected with one nozzle.

8. A surface coating apparatus for a tubular article according to claim 6 or 7, wherein: with or without a spraying unit arranged outside the tubular element.

9. A surface coating apparatus for a tubular article as claimed in claim 1, wherein: the device is characterized by further comprising a cleaning and waste liquid storage unit, wherein the cleaning and waste liquid storage unit is connected with the coating box body, the material storage unit, the power transmission unit, the fixed rotating mechanism and the spraying unit through a pipeline and a control valve and used for cleaning the device.

10. A surface coating apparatus for a tubular article as claimed in claim 9, wherein: the control unit is electrically connected with any one of the units and controls the operation parameters according to the setting.