CN105908184A - Enamel pipe suitable for hot coal water pipe type gas-gas heater and manufacturing method of enamel pipe - Google Patents
Enamel pipe suitable for hot coal water pipe type gas-gas heater and manufacturing method of enamel pipe Download PDFInfo
- Publication number
- CN105908184A CN105908184A CN201610516840.2A CN201610516840A CN105908184A CN 105908184 A CN105908184 A CN 105908184A CN 201610516840 A CN201610516840 A CN 201610516840A CN 105908184 A CN105908184 A CN 105908184A
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- Prior art keywords
- enamel
- pipe
- flue gas
- manufacture method
- applicable
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D11/00—Continuous processes; Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/02—Coating with enamels or vitreous layers by wet methods
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/083—Iron or steel solutions containing H3PO4
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention belongs to the technical field of heat exchange pipes, and relates to an enamel pipe suitable for a hot coal water pipe type gas-gas heater and a manufacturing method of the enamel pipe. The manufacturing method comprises the following steps that A, a base pipe is prepared, wherein a seamless steel pipe is selected as the base pipe, the base pipe is cut according to a set length, and the cut base pipe is degreased; B, an enamel glaze is prepared, wherein an enamel material is made into a glaze slip, and even stirring is carried out for standby application; C, enamel coating is carried out, wherein the surface of the base pipe is evenly coated with the glaze slip, and a glaze slip layer is formed; D, baking is carried out, wherein the base pipe obtained after the step C is completed is baked, and therefore an inner glaze layer is formed on the surface of the base pipe; E, secondary enamel coating is carried out, wherein the inner glaze layer of the base pipe obtained after the step D is completed is evenly coated with the glaze slip; and F, secondary baking is carried out, wherein the base pipe obtained after the step E is completed is baked, an outer glaze layer is formed outside the inner glaze layer, and the enamel pipe is obtained. The process method is simple, the production steps are stable and reliable, and the high-corrosion-resistance and high-thermal-conductivity enamel pipe for the gas-gas heater can be produced.
Description
Technical field
The invention belongs to heat exchanger tube manufacturing technology field, relate to one and be applicable to hot coal water pipe
The enamel pipe of formula flue gas heat-exchange unit and manufacture method thereof.
Background technology
Heat exchanger is a kind of to realize material between two or more fluid of different temperatures
Between heat transmission energy-saving equipment, be to make heat be passed to temperature by the fluid that temperature is higher
Spend relatively low fluid, make fluid temperature (F.T.) reach the index of flow specification, to meet technique bar
The needs of part, are the most also one of capital equipments improving energy utilization rate.Heat exchanger row
Industry relates to nearly kinds more than 30 such as HVAC, pressure vessel, sewerage disposing equipment, chemical industry, oil
Industry, mutually forms industry chain (supply chain).
The most both at home and abroad minimum discharge engineering is equipped with greatly coal heating and water tubular type flue gas heat-exchange unit
(GGH) heat after, being respectively used to dry collector outlet cooled flue gas and wet-esp
Flue gas.Heat medium water tubular type GGH is a kind of novel flue gas heat exchange equipment, is coal-burning power plant
One capital equipment of minimum discharge, in the middle of its utilization, heat medium water absorbs the heat in flue gas,
Making flue gas volume reduce, in flue gas, dust character is improved, efficient for low temp. electric deduster
Dedusting provides necessary condition；After heat medium water after absorption heat heats wet-esp again
Flue gas, eliminates chimney and emits the phenomenon of white cigarette, is also prevented from chimney corrosion simultaneously.Due to GGH
In heat exchange element be operated in below flue gas acid dew point, how to prevent heat exchange element corrosion damage
Bad is the subject matter in GGH design.
The physical property of the extensive chemical corrosion such as the alloy pipe base material acid-proof to be had of top grade, alkali,
The domestic alloy steel products of China does not possess this physical property at present, needs a large amount of import, mainly adopts
With import 1.4529 and two phase stainless steel, expensive.Heat medium water tubular type GGH at present
The material that reheater low-temperature zone uses is super-duplex stainless steel pipe, expensive, just throws
Provide expensive.
Summary of the invention
It is an object of the invention to for the deficiencies in the prior art, it is provided that a kind of process
It is applicable to the manufacture method of the enamel pipe of coal heating and water tubular type flue gas heat-exchange unit.
It is a further object of the present invention to provide a kind of enamel that can substitute duplex phase stainless tube
Pipe.
For reaching above-mentioned purpose, present invention employs following technical proposal: one is applicable to
The manufacture method of the enamel pipe of coal heating and water tubular type flue gas heat-exchange unit, comprises the following steps:
A, prepare base tube: choose seamless steel pipe as base tube, and carry out by preseting length
Cutting, the base tube after cutting carries out ungrease treatment,
B, preparation frit for porcelain enamel: enamel material is made glaze slip, stirs, standby,
C, enamel coating: glaze slip is coated in the surface of base tube uniformly, form glaze pulp layer,
D, baking: the base tube completing step C is toasted, thus is formed on base tube surface
Interior glaze layer,
E, secondary enamel coating: the base tube completing step D is uniformly coated on interior glaze layer
Glaze slip,
F, secondary baking: the base tube completing step E is toasted, is formed outside interior glaze layer
Outer glaze layer, obtains enamel pipe.
Manufacture method at the above-mentioned enamel pipe being applicable to coal heating and water tubular type flue gas heat-exchange unit
In, in step, the described seamless steel pipe trade mark is ND steel, and material is 09CrCuSb.
Manufacture method at the above-mentioned enamel pipe being applicable to coal heating and water tubular type flue gas heat-exchange unit
In, in step, the base tube degreased cleaning agent after cutting carries out cleaning by degreasing, clearly
Being neutralized cleaning with acidic cleaner after washing into, it is standby that neutralization cleaning completes post-drying.
Manufacture method at the above-mentioned enamel pipe being applicable to coal heating and water tubular type flue gas heat-exchange unit
In, described degreased cleaning agent includes NaOH or the potassium hydroxide that pH value is more than 13
Solution, described acidic cleaner is pH value phosphoric acid solution between 5-6.8.
Manufacture method at the above-mentioned enamel pipe being applicable to coal heating and water tubular type flue gas heat-exchange unit
In, described NaOH or potassium hydroxide solution contain the EDTA of 0.1-1wt%
Sodium salt, the AES of 1-3wt%, contains the amino sulphur of 0.1-0.5 in described phosphoric acid solution
Acid.
Manufacture method at the above-mentioned enamel pipe being applicable to coal heating and water tubular type flue gas heat-exchange unit
In, described acidic cleaner also includes the thiocarbamide of 0.4-0.6wt%.
Manufacture method at the above-mentioned enamel pipe being applicable to coal heating and water tubular type flue gas heat-exchange unit
In, in stepb, described enamel material is zirconium silicate.
Manufacture method at the above-mentioned enamel pipe being applicable to coal heating and water tubular type flue gas heat-exchange unit
In, the purity of described zirconium silicate is more than 97%, and particle diameter is less than 1.5 μm.
Manufacture method at the above-mentioned enamel pipe being applicable to coal heating and water tubular type flue gas heat-exchange unit
In, described interior glaze layer and the thickness of outer glaze layer are 140-220 μm.
The enamel pipe prepared according to above-mentioned manufacture method.
Compared with prior art, it is an advantage of the current invention that: process is simple, raw
Product step is reliable and stable, can produce the enamel for flue gas heat-exchange unit of high anticorrosion height heat conduction
Pipe.
Detailed description of the invention
Reagent used in following embodiment, if no special instructions, can be from routine biochemistry
Reagent shop is commercially available.Quantitative data in following example, is respectively provided with three repetitions
Experiment, results averaged.
Embodiment 1
A kind of manufacture method of the enamel pipe being applicable to coal heating and water tubular type flue gas heat-exchange unit, bag
Include following steps:
A, preparation base tube: choosing the trade mark is ND steel, and material is the seamless of 09CrCuSb
Steel pipe is as base tube, and cuts by preseting length, and the base tube after cutting carries out degreasing
Processing, the base tube degreased cleaning agent after cutting carries out cleaning by degreasing, cleaning by degreasing temperature
60-80 DEG C, rotating base tube when of cleaning, the rotating speed of base tube is 1-1.5m/min, cleans
Be neutralized cleaning after completing at normal temperatures with acidic cleaner, the rotating speed of base tube is
1-1.5m/min, neutralizes cleaning and completes post-drying, and polish with sand milling, make base tube outer wall
Roughness between 6-10 μm, standby, drying heated-air circulation oven,
B, preparation frit for porcelain enamel: enamel material is made glaze slip, stirs, standby,
Enamel material is zirconium silicate, and the purity of zirconium silicate is more than 97%, becomes particle diameter little with grinding of ball grinder
In 1.5 μm, the viscosity of glaze slip uses the test of extension amount method, and extension amount is 14-16g,
C, enamel coating: glaze slip is coated in the surface of base tube uniformly, form glaze pulp layer,
This step uses leaching to ward off method coating, and base tube is immersed in by concrete operation has glaze slip
In container, it would however also be possible to employ the method spraying or brushing, it is preferable to employ method is warded off in leaching, leaching
When warding off, the base tube speed of service is 2-3m/min,
D, baking: the base tube completing step C is toasted, thus is formed on base tube surface
Interior glaze layer, during baking, puts into base tube in baking oven, dries 15-20 at 150-200 DEG C
Minute, then base tube is put in intermediate frequency furnace, under the conditions of 850-920 DEG C, with
The speed of 0.4-0.7m/min is passed through from intermediate frequency furnace,
E, secondary enamel coating: the base tube completing step D is uniformly coated on interior glaze layer
Glaze slip, uses the spraying of wet shot method, and glaze slip layer thickness controls at 250-300mm,
F, secondary baking: the base tube completing step E is toasted, concrete, during baking,
Base tube is put in baking oven, dry 15-20 minute at 150-200 DEG C, then base tube is put
Enter in intermediate frequency furnace, under the conditions of 850-920 DEG C, with the speed of 0.4-0.7m/min from
By forming outer glaze layer outside interior glaze layer in intermediate frequency furnace, obtain enamel pipe.
Degreased cleaning agent includes NaOH or the potassium hydroxide solution that pH value is more than 13,
Described acidic cleaner is pH value phosphoric acid solution between 5-6.8.Specifically,
NaOH or potassium hydroxide solution contain the EDETATE SODIUM salt of 0.1-1wt%, 1-3
The AES of wt%, the sulfamic acid containing 0.1-0.5 and 0.4-0.6 in described phosphoric acid solution
The thiocarbamide of wt%.
In the present embodiment, the thickness of interior glaze layer and outer glaze layer is 140-220 μm.Degreasing
Cleaning agent and acidic cleaner are aqueous cleaning agent, environmental protection, EDETATE SODIUM salt and AES
Enhancing cleaning performance, AES the most also has rust-proof effect, and AES is that dodecyl is to ten
The sodium sulphate of six alkyl, it is also possible to directly use commercially available prod.
Embodiment 2
The present embodiment is substantially the same manner as Example 1, and difference is,
Degreased cleaning agent is the sodium hydroxide solution of following mass fraction:
Acidic cleaner is the hydrochloric acid solution of following mass fraction:
Chemical pure hydrochloric acid 2 parts,
Hexamethylenetetramine 0.5 part,
100 parts of water.
The degreased cleaning agent of the present embodiment has good degreasing, de-rust and antiseptic effect,
Degreased cleaning agent uses inorganic raw material completely, makes simple, during acidic cleaner is except playing
Outside with effect, hexamethylenetetramine can form plasticizing layer on base tube surface, plays antirust effect
Really.
Comparative example 1
This comparative example is substantially the same manner as Example 1, and difference is, base tube uses double
Phase stainless steel tube.
Thermal conductivity factor detects: by the mensuration Part II wink of plastics thermal conductivity and thermal diffusivity
State plane heat resource method measures, and surveying fixed time temperature is 25 DEG C.
As seen from the above table, the enamel pipe that embodiment 1 and 2 prepares can substitute two-phase completely
Stainless steel tube.
Specific embodiment described herein is only to present invention spirit theory for example
Bright.Those skilled in the art can be to described specific embodiment
Make various amendment or supplement or use similar mode to substitute, but without departing from
The spirit of the present invention or surmount scope defined in appended claims.
Claims (10)
1. it is applicable to a manufacture method for the enamel pipe of coal heating and water tubular type flue gas heat-exchange unit,
It is characterized in that, comprise the following steps:
A, prepare base tube: choose seamless steel pipe as base tube, and carry out by preseting length
Cutting, the base tube after cutting carries out ungrease treatment,
B, preparation frit for porcelain enamel: enamel material is made glaze slip, stirs, standby,
C, enamel coating: glaze slip is coated in the surface of base tube uniformly, form glaze pulp layer,
D, baking: the base tube completing step C is toasted, thus is formed on base tube surface
Interior glaze layer,
E, secondary enamel coating: the base tube completing step D is uniformly coated on interior glaze layer
Glaze slip,
F, secondary baking: the base tube completing step E is toasted, is formed outside interior glaze layer
Outer glaze layer, obtains enamel pipe.
The most according to claim 1 it is applicable to warding off of coal heating and water tubular type flue gas heat-exchange unit
The manufacture method of porcelain tube, it is characterised in that in step, described seamless steel pipe board
Number being ND steel, material is 09CrCuSb.
The most according to claim 1 it is applicable to warding off of coal heating and water tubular type flue gas heat-exchange unit
The manufacture method of porcelain tube, it is characterised in that in step, the base tube after cutting is with de-
Fat cleaning agent carries out cleaning by degreasing, is neutralized cleaning with acidic cleaner after having cleaned,
It is standby that neutralization cleaning completes post-drying.
The most according to claim 3 it is applicable to warding off of coal heating and water tubular type flue gas heat-exchange unit
The manufacture method of porcelain tube, it is characterised in that described degreased cleaning agent includes that pH value is big
In NaOH or the potassium hydroxide solution of 13, described acidic cleaner is that pH value exists
Phosphoric acid solution between 5-6.8.
The most according to claim 4 it is applicable to warding off of coal heating and water tubular type flue gas heat-exchange unit
The manufacture method of porcelain tube, it is characterised in that described NaOH or potassium hydroxide solution
In containing the EDETATE SODIUM salt of 0.1-1wt%, the AES of 1-3wt%, described phosphoric acid is molten
Liquid contains the sulfamic acid of 0.1-0.5.
The most according to claim 5 it is applicable to warding off of coal heating and water tubular type flue gas heat-exchange unit
The manufacture method of porcelain tube, it is characterised in that described acidic cleaner also includes 0.4-0.6
The thiocarbamide of wt%.
The most according to claim 1 it is applicable to warding off of coal heating and water tubular type flue gas heat-exchange unit
The manufacture method of porcelain tube, it is characterised in that in stepb, described enamel material is silicon
Acid zirconium.
The most according to claim 7 it is applicable to warding off of coal heating and water tubular type flue gas heat-exchange unit
The manufacture method of porcelain tube, it is characterised in that the purity of described zirconium silicate is more than 97%,
Particle diameter is less than 1.5 μm.
The most according to claim 1 it is applicable to warding off of coal heating and water tubular type flue gas heat-exchange unit
The manufacture method of porcelain tube, it is characterised in that described interior glaze layer and the thickness of outer glaze layer are
140-220μm。
10. the enamel pipe prepared according to the manufacture method of claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610516840.2A CN105908184A (en) | 2016-06-30 | 2016-06-30 | Enamel pipe suitable for hot coal water pipe type gas-gas heater and manufacturing method of enamel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610516840.2A CN105908184A (en) | 2016-06-30 | 2016-06-30 | Enamel pipe suitable for hot coal water pipe type gas-gas heater and manufacturing method of enamel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105908184A true CN105908184A (en) | 2016-08-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610516840.2A Pending CN105908184A (en) | 2016-06-30 | 2016-06-30 | Enamel pipe suitable for hot coal water pipe type gas-gas heater and manufacturing method of enamel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105908184A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121006A (en) * | 2017-06-06 | 2017-09-01 | 昆山美邦环境科技股份有限公司 | Dual anti-corrosion weathering steel enamel heat transfer element and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202853446U (en) * | 2012-10-25 | 2013-04-03 | 无锡市东群钢管有限公司 | Dustproof and anticorrosive heat exchanger pipe |
| CN105002497A (en) * | 2015-06-23 | 2015-10-28 | 昆山美邦环境科技有限公司 | Equipment and technology for sintering enamel coating on surface of steel pipe |
-
2016
- 2016-06-30 CN CN201610516840.2A patent/CN105908184A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202853446U (en) * | 2012-10-25 | 2013-04-03 | 无锡市东群钢管有限公司 | Dustproof and anticorrosive heat exchanger pipe |
| CN105002497A (en) * | 2015-06-23 | 2015-10-28 | 昆山美邦环境科技有限公司 | Equipment and technology for sintering enamel coating on surface of steel pipe |
Non-Patent Citations (3)
| Title |
|---|
| 上岗就业百分百系列丛书编委会: "《涂装工上岗就业百分百》", 30 June 2011 * |
| 彼得梅斯等: "《热浸镀锌手册》", 30 November 2015 * |
| 陈锋: "《表面活性剂性质、结构、计算与应用》", 31 March 2004 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121006A (en) * | 2017-06-06 | 2017-09-01 | 昆山美邦环境科技股份有限公司 | Dual anti-corrosion weathering steel enamel heat transfer element and preparation method thereof |
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