CN106092453A - The method of maintenance heat exchanger internal hemorrhage due to trauma - Google Patents
The method of maintenance heat exchanger internal hemorrhage due to trauma Download PDFInfo
- Publication number
- CN106092453A CN106092453A CN201610387870.8A CN201610387870A CN106092453A CN 106092453 A CN106092453 A CN 106092453A CN 201610387870 A CN201610387870 A CN 201610387870A CN 106092453 A CN106092453 A CN 106092453A
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- Prior art keywords
- tubulation
- sleeve pipe
- trauma
- heat exchanger
- hemorrhage due
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The method that the invention discloses maintenance heat exchanger internal hemorrhage due to trauma, heat exchanger includes corundum sleeve pipe, tube sheet, tubulation, housing.By described corundum sleeve pipe is replaced with rustless steel sleeve pipe so that the method simplifying described maintenance heat exchanger internal hemorrhage due to trauma, the method includes: knock out the described corundum sleeve pipe in heat exchanger；Utilization is suppressed leak test method and is detected described tubulation whether internal hemorrhage due to trauma, in order to detection obtains the tubulation of non-internal leakage and the tubulation of internal hemorrhage due to trauma；Change or block the tubulation of described internal hemorrhage due to trauma, in order to obtain tubulation or the tubulation of closure changed；And described rustless steel sleeve pipe is inserted and secured on the tubulation of described non-internal leakage and the tubulation of described replacing, in order to obtaining sleeve pipe tubulation connector, wherein, the second pipeline section is positioned at the tubulation of described non-internal leakage；The outside wall surface of described tube sheet forms backing layer, in order to obtain the heat exchanger after maintenance.Utilize rustless steel sleeve pipe to replace existing corundum sleeve pipe, effectively prevent easily damaged frequently replacing equipment part and the problem of corundum sleeve pipe clogged with fragments tubulation caused of corundum sleeve pipe, significantly shorten the repair time.
Description
Technical field
The present invention relates to chemical field, in particular it relates to the method for maintenance heat exchanger internal hemorrhage due to trauma.
Background technology
Unit of Coal Gasification for Pulverized Coal with Ash technique produces the supporting high temperature evaporation section of industrial combustion gas in use, because
The content of ashes of brown coal is higher, and in the raw gas of gasification furnace outlet, coal ash carrying amount is compared to other types gasification furnace output
Raw gas to take ash quantity higher, so raw gas is at the tubulation through high temperature evaporation section, tubulation is washed away bigger, easily
Make tubulation generation internal hemorrhage due to trauma.When maintenance it is to be understood that those tubulation internal hemorrhage due to trauma, it is necessary to the lining on tube sheet is all knocked out, suppresses examination
Leakage could substantially detect, and during knocking out lining, former corundum sleeve pipe, as well as broken, causes material unaccounted-for (MUF) not
Saying, the corundum fragment of fragmentation also can enter in tubulation, makes tubulation again block, maintenance time internal hemorrhage due to trauma tubulation to be changed or
With plug, the tubulation of internal hemorrhage due to trauma is blocked, the fragment in the best tubulation is drawn stifled, increase the difficulty of maintenance.
Thus, the method for maintenance heat exchanger internal hemorrhage due to trauma haves much room for improvement.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art.To this end, one object of the present invention
It is to propose a kind of method overhauling heat exchanger internal hemorrhage due to trauma, by described corundum sleeve pipe is replaced with rustless steel sleeve pipe, is prevented effectively from
Corundum sleeve pipe is easily damaged cause frequently change equipment part and the problem of corundum sleeve pipe clogged with fragments tubulation, significantly shorten
Repair time, reduce maintenance workload.
According to an aspect of the present invention, the invention provides a kind of method overhauling heat exchanger internal hemorrhage due to trauma, described heat exchanger
Including corundum sleeve pipe, tube sheet and tubulation.According to embodiments of the invention, the method is by replacing with stainless by described corundum sleeve pipe
Steel thimble is so that the method simplifying described maintenance heat exchanger internal hemorrhage due to trauma, and wherein, described rustless steel sleeve pipe includes: the first pipeline section, described
The external diameter of the first pipeline section is identical with the external diameter of described tubulation；With the second pipeline section, the external diameter of described second pipeline section is equal to described tubulation
Internal diameter, the method for described maintenance heat exchanger internal hemorrhage due to trauma includes: the described corundum sleeve pipe knocking out in heat exchanger；Leak test method is suppressed in utilization
Detect described tubulation whether internal hemorrhage due to trauma, in order to detection obtains the tubulation of non-internal leakage and the tubulation of internal hemorrhage due to trauma；Change or block described internal hemorrhage due to trauma
Tubulation, in order to obtain change tubulation or the tubulation of closure；And described rustless steel sleeve pipe is inserted and secured on described nothing
On the tubulation of internal hemorrhage due to trauma and the tubulation of described replacing, in order to obtaining sleeve pipe-tubulation connector, wherein, the second pipeline section is positioned at described nothing
In the tubulation of internal hemorrhage due to trauma；The outside wall surface of described tube sheet forms backing layer, in order to obtain the heat exchanger after maintenance.
The method of maintenance heat exchanger internal hemorrhage due to trauma according to embodiments of the present invention, utilizes rustless steel sleeve pipe to replace existing corundum set
Pipe, effectively prevent corundum sleeve pipe easily damaged cause frequently change asking of equipment part and corundum sleeve pipe clogged with fragments tubulation
Topic, significantly shorten the repair time, reduces maintenance workload.Further, rustless steel sleeve pipe is easily installed and dismantles, it is simple to heat exchange
Device overhauls.
It addition, the method for maintenance heat exchanger internal hemorrhage due to trauma according to the above embodiment of the present invention can also have following additional skill
Art feature:
According to embodiments of the invention, the step surface of described rustless steel sleeve pipe and the plate face of described tube sheet are at same plane
On.
According to embodiments of the invention, in described sleeve pipe-tubulation connector, the step surface of described rustless steel sleeve pipe is with described
The misalignment length of tube sheet is not more than 0.5 millimeter.
According to embodiments of the invention, the external diameter of described tubulation is 38 millimeters, and pipe thickness is 5 millimeters.
According to embodiments of the invention, the external diameter of described first pipeline section is 38 millimeters, and pipe thickness is 5 millimeters, a length of
80 millimeters.
According to embodiments of the invention, the external diameter of described second pipeline section is 28 millimeters, and pipe thickness is 5 millimeters, a length of
70 millimeters.
According to embodiments of the invention, the thickness of described backing layer is identical with the length of described first pipeline section.
According to embodiments of the invention, described rustless steel sleeve pipe is formed by high chromiumnickel austenite stainless steel.
According to embodiments of the invention, described high chromiumnickel austenite stainless steel is Cr25Ni20Austenitic stainless steel.
According to embodiments of the invention, described rustless steel sleeve pipe is by welding or one-body molded is formed.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from combining the accompanying drawings below description to embodiment and will become
Substantially with easy to understand, wherein:
Fig. 1 shows the schematic flow sheet of the method for maintenance heat exchanger internal hemorrhage due to trauma according to an embodiment of the invention；
Fig. 2 shows the structural representation of rustless steel sleeve pipe according to an embodiment of the invention；
Fig. 3 shows the partial structurtes schematic diagram of heat exchanger according to an embodiment of the invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, term " longitudinally ", " laterally ", " on ", D score, "front", "rear", "left", "right", " perpendicular
Directly ", " level ", " top ", the orientation of the instruction such as " end " or position relationship be based on orientation shown in the drawings or position relationship, be only
For the ease of describing the present invention rather than requiring that the present invention must be with specific azimuth configuration and operation, therefore it is not intended that right
The restriction of the present invention.
It should be noted that term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint phase
To importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", " second " feature permissible
Express or implicitly include one or more this feature.Further, in describing the invention, unless otherwise saying
Bright, " multiple " are meant that two or more.
According to an aspect of the present invention, the invention provides a kind of method overhauling heat exchanger internal hemorrhage due to trauma, this heat exchanger bag
Include corundum sleeve pipe, tube sheet and tubulation.With reference to Fig. 1, according to embodiments of the invention, the method for this maintenance heat exchanger internal hemorrhage due to trauma is carried out
Illustrating, the method utilizes rustless steel sleeve pipe inspection and repair shop to state heat exchanger internal hemorrhage due to trauma.
Here, with reference to Fig. 2, explain the structure of rustless steel sleeve pipe, rustless steel sleeve pipe 100 includes: the first pipe
Section 110 and the second pipeline section 120, wherein, the external diameter of the first pipeline section 110 is identical with the external diameter of tubulation, thus ensures the first pipeline section 110
With the model of tubulation to mating；The external diameter of the second pipeline section 120 is less than the internal diameter of tubulation, it is simple to the second pipeline section 120 is inserted tubulation
In.
According to embodiments of the invention, the size of sleeve pipe is adjusted according to the size of tubulation.Concrete according to the present invention
Embodiment, when the external diameter of tubulation is 38 millimeters, when pipe thickness is 5 millimeters, according to actual needs, can be by the first pipeline section 110
The external diameter that is dimensioned so as to be 38 millimeters, pipe thickness is 5 millimeters, a length of 80 millimeters.Meanwhile, can be by the second pipeline section 120
The external diameter that is dimensioned so as to be 28 millimeters, pipe thickness is 5 millimeters, a length of 70 millimeters.Thus, the second segment pipe of tubulation is inserted
The internal diameter of external diameter and tubulation is equal, makes second segment pipe just may be inserted into or tap with foreign object to insert, and heat exchanger is subject to when running
The impact expanded with heat and contract with cold, sleeve pipe is just close together with tubulation, it is not necessary to encapsulation process, thus, make gap be in the outside of plate pipe,
I.e. it is in gas circuit, has micro gap to nor affect on the operation of heat exchanger, simultaneously when overhauling heat exchanger, it is simple to sleeve pipe is taken off,
Tubulation leak source is processed.
According to embodiments of the invention, rustless steel sleeve pipe 100 is made up of high chromiumnickel austenite stainless steel.Heat exchanger
High temperature evaporation section is often subject to the high intensity souring of deep-etching high-temp liquid or gas, and high chromiumnickel austenite stainless steel has
There are excellent corrosion resistance and good heat-resisting quantity, most suitable in the sleeve pipe making high temperature evaporation section.Tool according to the present invention
Body embodiment, high chromiumnickel austenite stainless steel can be Cr25Ni20Austenitic stainless steel.Thus, corrosion resistance and heat-resisting quantity are more
Good, service life is longer.
According to embodiments of the invention, rustless steel sleeve pipe 100 is by welding or one-body molded is formed.Thus, the first pipe
Section is connected firmly with the second pipeline section, and service life is long.
Wherein, during using the method for welding to prepare sleeve pipe, the method for welding, environment etc. all directly affect sleeve pipe
Quality, it is usually required mainly for the most what time note:
(1) before weldering, the greasy dirt in the range of the first pipeline section and the groove of the second pipeline section and both sides 50mm thereof, rust, water etc. is miscellaneous
Matter is cleaned out；
(2) high chromiumnickel austenite stainless steel carburizing can make the intensity of steel reduce, and owing to high temperature makes carbide embrittlement, makes steel
Fragility increase, these all make heat affected area likely ftracture, make the deteriorated weldability of steel, for preventing carburizing, forbid first
Pipeline section and the second pipeline section are placed directly on carbon-steel parts, and should be placed on flitch and rustless steel backing plate, wire brush used by welder and
Hammer should be stainless steel；
(3) for keep suitable cooling rate, whole show mouth and can at the fixing port of indoor weldering all in indoor welding,
The Radix Saposhnikoviae of necessity, rainproof measure are taked in the welding of outdoor fixing port.
When (4) first pipeline sections and the second pipeline section group pair, the outer wall unfitness of butt joint of the step surface of rustless steel sleeve pipe and tube sheet should≤
0.5mm。
(5) slag on welding bead surface all should be removed after each welding bead completes, and carry out surface inspection, eliminate various surface and lack
Fall into.
It follows that with reference to Fig. 1, according to embodiments of the invention, the method for this maintenance heat exchanger internal hemorrhage due to trauma is explained
Bright, the method includes:
S100 knocks out corundum sleeve pipe
According to embodiments of the invention, knock out the corundum sleeve pipe in heat exchanger.When maintenance it is to be understood which tubulation internal hemorrhage due to trauma,
Being accomplished by the backing layer on tube sheet all to knock out, suppressing leak test could substantially detect, during knocking out backing layer,
Former corundum sleeve pipe, as well as broken, causes material unaccounted-for (MUF) not say, the corundum fragment of fragmentation also can enter in tubulation, makes tubulation again
Secondary blocking, and be difficult to clear up.Thus, existing corundum sleeve pipe is knocked out, it is simple to replace with rustless steel sleeve pipe.
S200 detects internal hemorrhage due to trauma
According to embodiments of the invention, utilizing and suppress leak test method detection tubulation whether internal hemorrhage due to trauma, detection obtains the tubulation of internal hemorrhage due to trauma,
Obtain the tubulation of non-internal leakage and the tubulation of internal hemorrhage due to trauma.Wherein, suppress leak test method to refer to the turnover water route of heat exchanger to carry out pass completely
Closing, the water route pressuring pump water delivery of heat exchanger carries out pressurising, when reaching more than operating pressure 0.1MPa, checks that sleeve pipe gas circuit is
No have water to ooze out.
S300 changes or the tubulation of closure internal hemorrhage due to trauma
According to embodiments of the invention, change or block the tubulation of internal hemorrhage due to trauma, obtain tubulation or the tubulation of closure changed, keep away
Exempt from the tubulation internal hemorrhage due to trauma of internal hemorrhage due to trauma.Relative to change tubulation, closure inner tube simple to operation, due to heat exchanger tubulation quantity very
Many, indivedual tubulation internal hemorrhage due to trauma can be blocked, and does not affect the normal use of heat exchanger.If the comparison of tubulation internal hemorrhage due to trauma is many,
Then can change tubulation.
S400 is inserted and fixed rustless steel sleeve pipe
With reference to Fig. 3, according to embodiments of the invention, rustless steel sleeve pipe 100 is inserted and secured on tubulation and the nothing of replacing
On the tubulation 200 of internal hemorrhage due to trauma, obtaining sleeve pipe-tubulation connector, wherein, the second pipeline section 120 is positioned at tubulation 200.By corundum sleeve pipe
After replacing with rustless steel sleeve pipe, then when overhauling, suppress leak test when knocking out backing layer, sleeve pipe will not be destroyed, strike backing layer more simultaneously
During, can live with the plug grip pipe plug of coupling, prevent lining from falling in tubulation.Although rustless steel sleeve pipe also due to
High temperature deformation or air scour damage a part, but the degree damaged was compared with originally need to all change, and almost can ignore
Disregard, and, it is simple to maintenance, the notable repair time shortening high temperature evaporation section, simultaneously, it is achieved sleeve pipe reuses.
Additionally, according to embodiments of the invention, the mounting means of rustless steel sleeve pipe is that the second pipeline section is inserted directly into high temperature steaming
Send out in the tubulation of section, it is not necessary to welding, thus, it is easy to install and remove, it is simple to parking maintenance, significantly shorten the repair time.
According to embodiments of the invention, the step surface 130 of rustless steel sleeve pipe 100 and the internal face of tube sheet 300 are same flat
On face, wherein, internal face refer near backing layer tube sheet wall to side.Thus, the sleeve pipe after replacing and tunica pipe
Position keeps consistent with structure, it is to avoid affect the performance of heat exchanger because it changes.
According to embodiments of the invention, in sleeve pipe-tubulation connector, the step surface 130 of rustless steel sleeve pipe 100 and tube sheet
Misalignment length is not more than 0.5 millimeter.Owing to gap is in gas circuit, a small amount of gas leakage does not affect the use of heat exchanger, simultaneously takes account of
Sleeve pipe can may be caused deformation by longitudinal stress, " field apparatus, industy pipe welding engineering construction and acceptance specification "
GB50236-2011 understand pipe or pipe fitting docking time inwall unfitness of butt joint be not to be exceeded the 10% of material, it is contemplated herein that be
Outer wall unfitness of butt joint, and wall thickness is 5mm, in sum, the outer wall of sleeve pipe the second pipeline section is not more than with the inwall unfitness of butt joint of tubulation
0.5mm.S500 forms backing layer
According to embodiments of the invention, the outside wall surface of tube sheet forms backing layer, it is thus achieved that the heat exchanger after maintenance.At pipe
The outside wall surface of plate forms backing layer, and heat exchanger in use, owing to the medium velocity of usual gas circuit is very fast, utilizes lining
Layer protection tube sheet, effectively stops raw gas and washes away tube sheet.
Identical according to embodiments of the invention, the thickness of backing layer and the length of the first pipeline section.
Below with reference to specific embodiment, the present invention will be described, it should be noted that these embodiments are only explanation
Property, and be not considered as limiting the invention.
Embodiment 1
In the present embodiment, utilize the method maintenance heat exchanger internal hemorrhage due to trauma of the present invention, specific as follows:
1, sleeve pipe is prepared
With high chromiumnickel austenite stainless steel (Cr25Ni20) making new casing, the tubulation of heat exchanger high temperature evaporation section is a diameter of
Φ 38*5mm, so selecting a diameter of Φ 38*5mm, a length of 80mm of the first pipeline section of sleeve pipe, in order to enable tubule to pack into row
Pipe, does not cause big gap simultaneously, selects the tubule of a diameter of Φ 28*5mm of the second pipeline section, and a length of 70mm, by the first pipeline section
Together with the second pipeline section seamless welding.
2, inner hexagon
(1) lining of heat exchanger and original corundum sleeve pipe are knocked out.
(2) tubulation is cleaned.
(3) utilize and suppress leak test method detection tubulation whether internal hemorrhage due to trauma, and the sleeve pipe at the tubulation two ends of internal hemorrhage due to trauma is blocked, it is to avoid thing
Mass flow enters the tubulation of internal hemorrhage due to trauma.
(4) the second pipeline section of sleeve pipe is inserted in the tubulation after the maintenance of high temperature evaporation section, make ladder section flat of sleeve pipe
Face and tube sheet outside wall surface flush, and wherein, the first pipeline section and the tubulation tube sheet of sleeve pipe do not weld.
(5) doing backing layer on tube sheet, the thickness of backing layer is 80mm, makes backing layer flush with the sleeve pipe mouth of pipe, completes to change
The maintenance of hot device.
Utilize said method that corundum sleeve pipe is replaced with rustless steel sleeve pipe, when again overhauling this equipment, when knocking out lining
Will not damage rustless steel sleeve pipe, it is easy to cleaning, the repair time is as follows: blowing out cools down 2 days, knocks out lining 1 day, cleans 1 day, serve as a contrast
In 1 day, air-dry 1 day, altogether overhaul time-consuming 6 days.And using corundum sleeve pipe, the repair time is as follows: high temperature evaporation Duan Leng after blowing out
But 2 days, strike lining and suppress leak test 1 day, clean tubulation 15 days, in fitted lining 1 day, air-dry 2 days, time altogether 21 days.Obviously, this is utilized
After corundum sleeve pipe is replaced with rustless steel sleeve pipe by the method for invention, significantly shorten the repair time.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
These embodiments can be carried out multiple change in the case of departing from the principle of the present invention and objective, revise, replace and modification, this
The scope of invention is limited by claim and equivalent thereof.
Claims (10)
1. the method overhauling heat exchanger internal hemorrhage due to trauma, described heat exchanger includes corundum sleeve pipe, tube sheet, tubulation and housing, its feature
It is, by described corundum sleeve pipe is replaced with rustless steel sleeve pipe so that the method simplifying described maintenance heat exchanger internal hemorrhage due to trauma,
Wherein,
Described rustless steel sleeve pipe includes:
First pipeline section, the external diameter of described first pipeline section is identical with the external diameter of described tubulation；With
Second pipeline section, the external diameter of described second pipeline section is equal to the internal diameter of described tubulation,
The method of described maintenance heat exchanger internal hemorrhage due to trauma includes:
Knock out the described corundum sleeve pipe in heat exchanger；
Utilization is suppressed leak test method and is detected described tubulation whether internal hemorrhage due to trauma, in order to detection obtains the tubulation of non-internal leakage and the tubulation of internal hemorrhage due to trauma；
Change or block the tubulation of described internal hemorrhage due to trauma, in order to obtain tubulation or the tubulation of closure changed；And
Described rustless steel sleeve pipe is inserted and secured on the tubulation of described non-internal leakage and the tubulation of described replacing, in order to overlapped
Pipe-tubulation connector, wherein, the second pipeline section is positioned at the tubulation of described non-internal leakage；
The outside wall surface of described tube sheet forms backing layer, in order to obtain the heat exchanger after maintenance.
Method the most according to claim 1, it is characterised in that the step surface of described rustless steel sleeve pipe and the plate of described tube sheet
Face is at grade.
Method the most according to claim 1, it is characterised in that in described sleeve pipe-tubulation connector, described rustless steel sleeve pipe
The misalignment length of step surface and described tube sheet be not more than 0.5 millimeter.
Method the most according to claim 1, it is characterised in that the external diameter of described tubulation is 38 millimeters, pipe thickness is 5 millis
Rice.
Method the most according to claim 4, it is characterised in that the external diameter of described first pipeline section is 38 millimeters, pipe thickness
It is 5 millimeters, a length of 80 millimeters.
Method the most according to claim 3, it is characterised in that the external diameter of described second pipeline section is 28 millimeters, pipe thickness
It is 5 millimeters, a length of 70 millimeters.
Method the most according to claim 1, it is characterised in that the thickness of described backing layer and the length of described first pipeline section
Identical.
Method the most according to claim 1, it is characterised in that described rustless steel sleeve pipe is by high chromiumnickel austenite stainless steel
Formed.
Method the most according to claim 1, it is characterised in that described high chromiumnickel austenite stainless steel is Cr25Ni20Austenite
Rustless steel.
Method the most according to claim 1, it is characterised in that described rustless steel sleeve pipe is by welding or one-body molded shape
Become.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610387870.8A CN106092453B (en) | 2016-06-02 | 2016-06-02 | Method for overhauling inner leakage of heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610387870.8A CN106092453B (en) | 2016-06-02 | 2016-06-02 | Method for overhauling inner leakage of heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN106092453A true CN106092453A (en) | 2016-11-09 |
| CN106092453B CN106092453B (en) | 2020-11-20 |
Family
ID=57448167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610387870.8A Active CN106092453B (en) | 2016-06-02 | 2016-06-02 | Method for overhauling inner leakage of heat exchanger |
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| CN107576215A (en) * | 2017-09-25 | 2018-01-12 | 广西信发铝电有限公司 | A kind of water, gas change heater |
| CN107655359A (en) * | 2017-09-25 | 2018-02-02 | 广西信发铝电有限公司 | A kind of anti-corrosion method of coal gas heat exchanger |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106092453B (en) | 2020-11-20 |
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