CN109630765A - Steam power plant's wet desulphurization conveys wear-resistance and anti-corrosion multiple tube and preparation with mineral slurry - Google Patents
Steam power plant's wet desulphurization conveys wear-resistance and anti-corrosion multiple tube and preparation with mineral slurry Download PDFInfo
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- CN109630765A CN109630765A CN201811551127.7A CN201811551127A CN109630765A CN 109630765 A CN109630765 A CN 109630765A CN 201811551127 A CN201811551127 A CN 201811551127A CN 109630765 A CN109630765 A CN 109630765A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
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- General Engineering & Computer Science (AREA)
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- Rigid Pipes And Flexible Pipes (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Steam power plant's wet desulphurization conveys wear-resistance and anti-corrosion multiple tube and preparation with mineral slurry, belongs to slurries delivery pipe technical field.It is nested together at least one layer of outer layer by the way that hot melt coextrusion is coaxially compound including one layer of internal layer；Outer layer is that one or more layers passes through the compound Concentric layered structure nested together of hot melt coextrusion；Contact position between layers forms melting interface.The present invention had both solved mineral slurry during transportation to the abrasion of pipeline, corrosive nature requirement, has also achieved mineral slurry and conveys be must satisfy pressure, intensity and life requirement；This wear-resistance and anti-corrosion multiple tube has high-intensitive and excellent high rigidity simultaneously, significantly improves the span bending strength of tubing, is more suitable for high span installation；And multiple tube co-extrusion modling in process of production, as an organic whole without generating any fall off, it is therefore prevented that generate the possibility of blocking to pipeline.
Description
Technical field
The invention belongs to slurries delivery pipe technical fields more particularly to a kind of steam power plant's wet desulphurization to be conveyed with mineral slurry
Wear-resistance and anti-corrosion multiple tube and preparation.
Background technique
In steam power plant and other industrial productions, the mineral slurry of generation mainly contains sulphite, sulfate, nitric acid
The mixtures such as salt, carbonate and its acid, alkali, people mainly use metallic conduit or nonmetal pipeline to convey all the time.
The mineral slurries mixture such as this sulfate has extremely strong corrosivity to metal material, while during transportation to metal tube
The abrasion in road is larger, and greatly affected conveyance conduit uses time and service life, it has to be replaced as frequently as or repair conveying
Pipeline increases production cost and workload, also impacts sometimes to the normal operation of equipment.
Common nonmetal pipeline is compared with metal tube, has light-weight, the only 1/4-1/3 of metal tube；Have excellent
It is corrosion-resistant, simple installation is rapid, energy saving, convenient transportation, equal remarkable advantages at low cost.But due to common nonmetallic materials sheet
The characteristic of body is haveed the shortcomings that serious: patience is poor, pressure-proof and impact resistance is not strong, linear expansion coefficient is big etc..Just because of organic
The characteristics of nonmetallic materials itself, to the conveying of the mineral slurries mixture such as sulfate, there are biggish limitations, such as common
Requirement to mineral slurry delivery pipe is also much not achieved in the wearability of nonmetallic materials, pipe high-pressure is also not achieved in bearing capacity
The pressure requirements etc. of conveying.
The method in metallic conduit liner butyl layers occurred in recent years, partly solves above-mentioned problem.This
Kind of pipeline is to stick abrasion-proof corrosion-proof of the one layer of preferable sheet of butyl rubber of wear-resisting property as pipeline in the inner wall of metallic conduit
Layer is lost, one layer of solvent type liquid adhesive is coated between metal pipe internal wall and sheet of butyl rubber, so that butyl rubber piece
It is good bonding between material and metal pipe internal wall.This method that butyl layers are pasted in metallic conduit, combines non-gold
Belong to material and the advantage of steel pipe respectively also preferably solves the problems, such as the wear resistant corrosion resistant of tubing, it is resistance to also solve non-metallic pipe
It is rotten it is not withstand pressure, steel pipe is pressure-resistant not corrosion resistant the disadvantages of.But this tubing high production cost, manufacturing procedure are more troublesome, especially small
The processing of caliber pipe is even more difficulty；And solvent type liquid adhesive is used in process, volatile matter (VOC) is to ring
Border and construction worker bring biggish injury and influence；In addition this solvent type liquid adhesive is easy aging, leads to this
Kind of line with rubber metal tube in use when have bonding agent degumming event, as a result butyl layers fall off with metal tube, mine
Object slurry can not normally convey and outer layer metal tube is corroded quickly.Mineral slurry conveyance conduit has not only been seriously affected in this way
Normal use and service life, and since falling off for bonding agent causes the sheet rubber being torn easily to block pipeline, it causes greatly
Produce peril etc..
Summary of the invention
The purpose of the present invention is customer service prior art problems, and it is defeated to improve a kind of new steam power plant's wet desulphurization mineral slurry
Send wear-resistance and anti-corrosion multiple tube and preparation.Steam power plant's wet desulphurization of the invention conveys wear-resistance and anti-corrosion multiple tube with mineral slurry
Belong to environment-friendly products, the precipitation without any VOC emission and harmful substance does not generate natural environment and production technician any
Influence.
Steam power plant's wet desulphurization of the invention conveys wear-resistance and anti-corrosion multiple tube with mineral slurry, and structure is shown in schematic diagram 1, wraps
One layer of internal layer and at least one layer of outer layer is included to nest together by the way that hot melt coextrusion is coaxially compound；Outer layer is that one or more layers is (excellent
Select 2-7 layers) the compound Concentric layered structure nested together is coextruded by hot melt；Internal layer is with a thickness of 1.0-10.0mm, outer layer
Overall thickness is 5.0-50.0mm.
When outer layer is MULTILAYER COMPOSITE, contact position between layers forms melting interface；Each layer of specific material composition
It is identical or different.
Internal layer is thermoplastic elastomer (TPE) wear-and corrosion-resistant corrosion material, and internal layer is preferably thermoplastic elastomer (TPE) TPE wear-resistance and anti-corrosion
Material；
Outer layer is enhancing modified version macromolecule polymer material；The intrinsic pressure for mainly undertaking the conveying of multiple tube medium is wanted
Ask, the rigid requirements of pipeline, span bending strength, external force conquassation and external environment and weatherability requirement.
Steam power plant's wet desulphurization described above conveys the preparation method of wear-resistance and anti-corrosion multiple tube with mineral slurry, including
Following steps:
(1) raw material prepare
For various raw material before use, being both needed to be dried, water content is less than 0.5wt%；
(2) multiple tube prepares mold requirement
Mineral slurry conveys wear-resistance and anti-corrosion multiple tube, and maximum feature is that molding can be utilized without using hot melt adhesive
The Material cladding of inner layer material and outer layer is coextruded into multi-layered type by mold and processing technology, is realized good heat fusion, is formed
One organic whole；
Mold design is in order to realize organically blending between above-mentioned two steps coextrusion material, and the present invention is using a kind of novel
Mold, signal are as shown in Figure 2:
Mold is followed successively by wide diameter tube section, dog-ear protrusion pipeline section, narrow-bore tube section along being divided axially into three sections；The wherein folding
Angle protrusion pipeline section is that radially protrusion becomes larger, and it is broken line angled arrangement that protrusion, which becomes larger, and axial direction is divided into first half
Straight incline, which becomes larger a sections, reduces b sections with latter half straight incline, and straight incline becomes larger between a sections and b sections of straight incline diminution
Angle be greater than 90 degree, less than 180 degree；
The first half straight incline of wide diameter tube section and dog-ear protrusion pipeline section becomes larger in a sections, and centre is sky, radially has more
The axial parallel circular passage of layer material, successively outward to have the corresponding circular passage of 1 layer of inner layer material, one or more layers outer layer pair
The circular passage answered；The latter half straight incline of dog-ear protrusion pipeline section reduces b sections and narrow-bore tube section only has a circular passage, ring
The first half straight incline of the radial width in shape channel and wide diameter tube section and dog-ear protrusion pipeline section becomes larger the inner layer material in a sections
The sum of the radial width of corresponding circular passage and the corresponding circular passage of outer layer；Wherein the wide diameter tube section and narrow-bore tube section refer to
Be wide diameter tube section center bore dia of the bore dia relatively larger than narrow-bore tube section center；And it is logical in the corresponding annular of narrow-bore tube section
The inner diameter wall in road is equipped with equally distributed protrusion, and outside diameter wall is equipped with the groove being distributed, increases the inhomogeneities in face, and convex
It rises and groove has dislocation in radial direction；
The coextrusion structure of one or more of materials of inner layer material and outer layer, one or more layers structure, passes through mold
Compression, amplification, using compression tortuous three times, do not need the bonding effect by hot melt adhesive, be finally reached layers of material it
Between good combination without generate delamination.Protrusion and groove in schematic diagram have the dislocation of certain distance, guarantee material melts body
Tortuous flow and adequately bonding.
(3) the coextrusion processing of multiple tube preparation.
Steam power plant's wet desulphurization mineral slurry conveying wear-resistance and anti-corrosion multiple tube that the present invention is developed, is two layers or more
Layer co-extrusion wear-resistance and anti-corrosion composite construction.Both solved in this way mineral slurry during transportation to the abrasion of pipeline,
Corrosive nature requirement has also achieved mineral slurry and conveys be must satisfy pressure, intensity and life requirement；It is this resistance to simultaneously
Mill anticorrosion multiple tube has high-intensitive and excellent high rigidity, significantly improves the span bending strength of tubing, is more suitable for height
Span installation；And multiple tube co-extrusion modling in process of production, it is any without generating as an organic whole
It falls off, it is therefore prevented that the possibility of blocking is generated to pipeline；In addition multiple tube price more rationally, light weight, installation it is more square
Just, a large amount of installation and maintenance cost are saved；
Detailed description of the invention
Fig. 1 is that steam power plant's wet desulphurization mineral slurry of the invention conveys wear-resistance and anti-corrosion composite pipe structure schematic diagram；
Outer layer number in schematic diagram is not to refer in particular to, including but not limited to this number of plies；
1 internal layer, 2 outer 1；3 outer 2；4 outer 3；5 outer 4；
Fig. 2 is the model equipment for preparing the multiple tube.
Specific embodiment
Below with reference to embodiment, the present invention will be further described, but the present invention is not limited to following embodiments.
Embodiment
1, mineral slurry convey wear-resistance and anti-corrosion multiple tube, internal layer be wear-resistance and anti-corrosion TPE material (or
Other wear-resistant materials), by a kind of macromolecular elastomer and thermoplastic blending and modifying, a kind of obtained thermoplastic elastomer (TPE).
Including but not limited to as b-propylene copolymer be blended with metallocene-olefin polymer a kind of thermoplastic elastomer (TPE) TPE to be formed, its
His thermoplastic elastomer (TPE) is more than wear-resistance and anti-corrosions raw material such as molecular weight polyethylene (UHMWPE).
" sea-island " shape structure of this analog thermoplastic elastomer TPE, excellent resilience is provided for material, is also material
It is wear-resisting provide the foundation, so that wear-resisting, the anticorrosion for pipeline provide guarantee.The present invention is referred to using the performance of TPE material
It is as follows to mark (including but not limited to following data):
Steam power plant's wet desulphurization conveys wear-resistance and anti-corrosion multiple tube, internal layer-wear-resistance and anti-corrosion thermoplasticity with mineral slurry
Elastomer TPE (or other wear-and corrosion-resistant corrosion materials)；The thickness range of internal layer is in 1.0-10.0mm, and specific thickness is because of multiple tube
The diameter of material and it is different；
2, steam power plant's wet desulphurization conveys wear-resistance and anti-corrosion multiple tube with mineral slurry, and cladding material has high molecular polymerization
Object, or modified high intensity, the high rigidity polymer composites enhanced etc. are (including but not limited to such as PP/HDPE, fiber or inorganic
Material reinforcement PP/PE, weather-proof PP/PE, hot melt adhesion resin etc.) one or more of MULTILAYER COMPOSITE.
Example: fiber/inorganic material enhancing PP/HDPE performance indicator (including but not limited to following data)
| Density g/cm3 | Tensile strength MPa | Bending strength MPa | Impact strength KJ/m2 |
| 1.12 | 56 | 81 | 55 |
Steam power plant's wet desulphurization mineral slurry conveying wear-resistance and anti-corrosion multiple tube, the one or more of materials of outer layer, by
One or more layers co-extrusion forms；The thickness range of outer layer in 5.0-50.0mm, specific thickness by composite pipe diameter
Size, pressure rating determine.
Steam power plant's wet desulphurization described above conveys the preparation method of wear-resistance and anti-corrosion multiple tube with mineral slurry, including
Following steps:
(1) raw material prepare
For various raw material before use, being both needed to be dried, water content is less than 0.5wt%；
(2) multiple tube preparation process and mold requirement
Mineral slurry conveys wear-resistance and anti-corrosion multiple tube, and maximum feature is that molding can be utilized without using hot melt adhesive
Mold and processing technology, one or more macromolecules (modification) polymer co-extrusion of inner layer material and outer layer at multilayer
Type realizes good heat fusion, forms an organic whole.
1) internal layer wear-resistance and anti-corrosion TPE material and cladding material merge
The wear-resistance and anti-corrosion TPE material of compound inner tube layer and the high molecular polymer of outer layer or polymer-modified composite material
Between realize good fusion, centre is not needed using any hot melt adhesion resin, directly by coextrusion processing technology with
Molding die is jointly completed.
2) the mutual heat fusion between multiple tube cladding material forms one or more layers structure
The outer layer of multiple tube can have one or more of materials, be formed by one or more layers co-extrusion；When outer layer by
When MULTILAYER COMPOSITE coextrusion is constituted, good fusion must be realized between outer layer layers of material (including one or more of materials),
Do not needed between each material using hot melt adhesion resin, between each layer and a variety of materials by coextrusion processes and molding die come
It is common to complete.
3) mold design
In order to realize organically blending between above-mentioned two steps coextrusion material, the present invention is shown using a kind of novel mold
Meaning is as shown in Figure 2:
Mold is followed successively by wide diameter tube section, dog-ear protrusion pipeline section, narrow-bore tube section along being divided axially into three sections；The wherein folding
Angle protrusion pipeline section is that radially protrusion becomes larger, and it is broken line angled arrangement that protrusion, which becomes larger, and axial direction is divided into first half
Straight incline, which becomes larger a sections, reduces b sections with latter half straight incline, and straight incline becomes larger between a sections and b sections of straight incline diminution
Angle be greater than 90 degree, less than 180 degree；
The first half straight incline of wide diameter tube section and dog-ear protrusion pipeline section becomes larger in a sections, and centre is sky, radially has more
The axial parallel circular passage of layer material, successively outward to have the corresponding circular passage of 1 layer of inner layer material, one or more layers outer layer pair
The circular passage answered；The latter half straight incline of dog-ear protrusion pipeline section reduces b sections and narrow-bore tube section only has a circular passage, ring
The first half straight incline of the radial width in shape channel and wide diameter tube section and dog-ear protrusion pipeline section becomes larger the inner layer material in a sections
The sum of the radial width of corresponding circular passage and the corresponding circular passage of outer layer；Wherein the wide diameter tube section and narrow-bore tube section refer to
Be wide diameter tube section center bore dia of the bore dia relatively larger than narrow-bore tube section center；And it is logical in the corresponding annular of narrow-bore tube section
The inner diameter wall in road is equipped with equally distributed protrusion, and outside diameter wall is equipped with the groove being distributed, increases the inhomogeneities in face, and convex
It rises and groove has dislocation in radial direction；
One or more of materials of inner layer material and outer layer, one or more layers structure coextruded layer between, pass through mold
Compression, amplification, be finally reached between layers of material not by the bonding effect of hot melt adhesive using compression tortuous three times
Good combination without generate delamination.Protrusion and groove in schematic diagram have the dislocation of certain distance, guarantee material melts body
Tortuous flow and adequately bonding.
(3) the coextrusion processing technology of multiple tube preparation
It is intended to two or more macromolecule polymer materials to be effectively coextruded into for an entirety, processes work squeezing out
Also general plastic pipe processing is different from terms of skill:
1) molecular weight of inner layer material TPE material is larger, reaches 2,000,000 or more, and elastic properties of materials is good, stream
Dynamic property is poor, this just needs the processing technology different from common material, overcomes the resilience of material to the influence of machine-shaping.
The processing temperature of TPE material generally at 220-245 DEG C, the screw slenderness ratio L/D of extruder≤
38, extruded velocity V=0.2-2.0m/min；
2) cladding material is high molecular polymer or modified enhancing polymer composites etc. (including but not limited to such as PP/
HDPE, fiber or inorganic material enhance PP/PE, other MODIFIED PPs/PE material) outer layer as multiple tube, for different height
Molecularly Imprinted Polymer material will take respectively the processing technology for being suitable for layers of material performance characteristics, be higher than 30-70 DEG C of melting temperature
(it is 10-30 DEG C high to send temperature than unmodified macromolecule polymer material), screw slenderness ratio L/D≤30 of extruder are squeezed
Speed V=0.2-2.0m/min out.
It is below the processing technology of several cladding materials, the cladding material of multiple tube of the present invention includes but is not limited to these types
Material.
Comparative example 1: cladding material is high molecular polymer
High molecular polymer, the organic material general as compound outer tube layer, there is extensive purposes.Such as: the processing of PP
Temperature is at 210-230 DEG C, and the processing temperature of PE is at 190-210 DEG C, screw slenderness ratio L/D≤30 of extruder, extruded velocity V=
0.2—2.0m/min；
Example 2: cladding material is the high molecular polymer of fiber or inorganic material-modified enhancing
When multiple tube has higher intensity, rigidity, span bending to require, common high molecular materials are not able to satisfy multiple tube
The needs that can be required.It is required to reach high intensity, high rigidity and high the span bending of multiple tube, we must be to cladding material
The modified enhancing of high molecular polymer.Usually we add fibrous material or other inorganic material in high molecular polymer, come
Achieve the purpose that modified enhancing.Such as glass fibre (or carbon fiber or basalt fibre) enhancing PP/PE or other inorganic material
Enhance PP/PE etc.；Wherein, the processing temperature of glass fibre or inorganic material-modified enhancing PP material is at 230-260 DEG C, glass
The processing temperature of fiber or inorganic material-modified enhancing PE material is at 210-240 DEG C；Screw slenderness ratio L/D≤30 of extruder,
Extruded velocity V=0.2-2.0m/min.
Example 3: cladding material is several modified high-molecular polymer co-extrusion structures
When the outer layer of multiple tube there are certain particular/special requirements, the cooperation of several high molecular polymers is needed to can be only achieved it
When performance requirement, we will meet production by the co-extrusion structure (i.e. MULTILAYER COMPOSITE) of several modified high-molecular polymer
The service performance requirement of product.
During coextrusion, the extruded material of each composite layer is controlled by the temperature and extrusion of independent flow passage, reaches material
The normal extrusion requirement of material.After a variety of materials enter die cavity, the extruded velocity of each layer is adjusted, is formed and is coordinated, is uniform total
It squeezes out, is acted on using the extruding and kneading of mold, each layer is bonded together strongerly, to form one organically
It is whole.
Such as: internal layer is TPE material, successively outer layer 1 is the modified enhancing PP composite material of glass fibre, outer layer 2 is weather-proof
The three-layer co-extruded multiple tube out of MODIFIED PP material.At 230-240 DEG C, the processing temperature of outer layer 1 controls the control of internal layer processing temperature
At 240-250 DEG C, the processing temperature of outer layer 2 is controlled at 220-230 DEG C；Extruded velocity is uniformly controlled in 0.2-2.0m/min.
Claims (6)
1. steam power plant's wet desulphurization conveys wear-resistance and anti-corrosion multiple tube with mineral slurry, which is characterized in that including one layer of internal layer and
At least one layer of outer layer is nested together by the way that hot melt coextrusion is coaxially compound；Outer layer is that one or more layers is multiple by hot melt coextrusion
Close the Concentric layered structure nested together；For internal layer with a thickness of 1.0-10.0mm, outer layer overall thickness is 5.0-50.0mm.
2. steam power plant's wet desulphurization described in accordance with the claim 1 conveys wear-resistance and anti-corrosion multiple tube, feature with mineral slurry
It is, the multilayer of outer layer is 2-7 layers.
3. steam power plant's wet desulphurization described in accordance with the claim 1 conveys wear-resistance and anti-corrosion multiple tube, feature with mineral slurry
It is, when outer layer is MULTILAYER COMPOSITE, contact position between layers forms melting interface；Each layer of specific material composition is identical
Or it is different.
4. steam power plant's wet desulphurization described in accordance with the claim 1 conveys wear-resistance and anti-corrosion multiple tube, feature with mineral slurry
It is, internal layer is thermoplastic elastomer (TPE) wear-and corrosion-resistant corrosion material, and internal layer is preferably thermoplastic elastomer (TPE) TPE wear-resistance and anti-corrosion material
Material；Outer layer is enhancing modified version macromolecule polymer material；Mainly undertake intrinsic pressure requirement, the pipeline of the conveying of multiple tube medium
Rigid requirements, span bending strength, external force conquassation and external environment and weatherability requirement.
Wear-resistance and anti-corrosion multiple tube is conveyed with mineral slurry 5. preparing the described in any item steam power plant's wet desulphurizations of claim 1-4
Method, comprising the following steps:
(1) raw material prepare
For various raw material before use, being both needed to be dried, water content is less than 0.5wt%；
(2) multiple tube prepares mold requirement
Mineral slurry conveys wear-resistance and anti-corrosion multiple tube, and maximum feature is that molding die can be utilized without using hot melt adhesive
And processing technology, the Material cladding of inner layer material and outer layer is coextruded into multi-layered type, good heat fusion is realized, forms one
Organic whole；
Mold is followed successively by wide diameter tube section, dog-ear protrusion pipeline section, narrow-bore tube section along being divided axially into three sections；Wherein the dog-ear is convex
Playing pipeline section is that radially protrusion becomes larger, and it is broken line angled arrangement that protrusion, which becomes larger, and axial direction is divided into first half straight line
Inclination, which becomes larger a sections, reduces b sections with latter half straight incline, the folder that straight incline becomes larger between a sections and b sections of straight incline diminution
Angle is greater than 90 degree, is less than 180 degree；
The first half straight incline of wide diameter tube section and dog-ear protrusion pipeline section becomes larger in a sections, and centre is sky, radially there is multilayer material
The axial parallel circular passage of material, is successively to have the corresponding circular passage of 1 layer of inner layer material, one or more layers outer layer corresponding outward
Circular passage；The latter half straight incline of dog-ear protrusion pipeline section reduces b sections and narrow-bore tube section only has a circular passage, and annular is logical
The radial width in road and the first half straight incline of wide diameter tube section and dog-ear protrusion the pipeline section inner layer material in a sections that becomes larger are corresponding
Circular passage and the corresponding circular passage of outer layer the sum of radial width；Wherein the wide diameter tube section and narrow-bore tube section refer to
Bore dia of the bore dia at wide diameter tube section center relatively larger than narrow-bore tube section center；And in the corresponding circular passage of narrow-bore tube section
Inner diameter wall is equipped with equally distributed protrusion, and outside diameter wall is equipped with the groove that is distributed, increases the inhomogeneities in face, and protrusion with
Groove has dislocation in radial direction；
One or more of materials of inner layer material and outer layer, one or more layers structure coextruded layer between, pass through the pressure of mold
Contracting is amplified, using compression tortuous three times, is not needed the bonding effect by hot melt adhesive, is finally reached between layers of material
Good combination without generate delamination；
(3) the coextrusion processing of multiple tube preparation.
6. according to the method for claim 5, which is characterized in that protrusion and groove have distance to misplace, and guarantee material melts body
Tortuous flow and adequately bonding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811551127.7A CN109630765A (en) | 2018-12-18 | 2018-12-18 | Steam power plant's wet desulphurization conveys wear-resistance and anti-corrosion multiple tube and preparation with mineral slurry |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811551127.7A CN109630765A (en) | 2018-12-18 | 2018-12-18 | Steam power plant's wet desulphurization conveys wear-resistance and anti-corrosion multiple tube and preparation with mineral slurry |
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| CN109630765A true CN109630765A (en) | 2019-04-16 |
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| CN201811551127.7A Pending CN109630765A (en) | 2018-12-18 | 2018-12-18 | Steam power plant's wet desulphurization conveys wear-resistance and anti-corrosion multiple tube and preparation with mineral slurry |
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2018
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