CN110595103B - High-temperature generator tube plate structure for lithium bromide cold-warm water unit - Google Patents
High-temperature generator tube plate structure for lithium bromide cold-warm water unit Download PDFInfo
- Publication number
- CN110595103B CN110595103B CN201911043653.7A CN201911043653A CN110595103B CN 110595103 B CN110595103 B CN 110595103B CN 201911043653 A CN201911043653 A CN 201911043653A CN 110595103 B CN110595103 B CN 110595103B
- Authority
- CN
- China
- Prior art keywords
- tube
- lithium bromide
- temperature generator
- expander
- tube plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B33/00—Boilers; Analysers; Rectifiers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A tube hole of the tube plate is a taper hole, and the taper angle of the tube hole is equal to or larger than the taper angle of an expansion rod of a tube expander. On one hand, the invention can ensure that the pipe expansion force of the pipe expander expansion opening is mainly acted on the expansion opening close to the solution side, and can eliminate the solution side gap, thereby avoiding the gap corrosion; the excessive force cannot be applied to the welding position, and the influence on the welding seam is avoided; thereby improving the overall strength; on the other hand, the leakage resistance and the corrosion resistance are greatly improved.
Description
Technical Field
The invention relates to a lithium bromide water cooling and heating unit, in particular to a high-temperature generator tube plate structure for the lithium bromide water cooling and heating unit.
Background
As shown in fig. 1: the tube expander is a necessary tool for the expansion technology, when the tube (such as the smoke tube 4) is connected with the tube plate, the tube needs to be expanded through the tube expander 7 to realize the sealing of the tube and the tube plate 3, so as to prevent the gap between the tube and the tube plate from generating, and causing leakage and corrosion. When the pipe expander is used, the distance between the expansion balls is expanded by continuously rotating and pushing the expansion rod with the taper of the pipe expander, so that the aim of expanding the pipe end and enabling the pipe end to be tightly attached to the pipe plate hole is fulfilled. Due to the taper problem of the expansion rod, the rotating track of the expansion ball of the pipe expander is also conical. This concentrates the force of the expander expansion to the near end of the tube bore in the tube sheet, which leads to two problems: (1) a sufficient expansion force cannot be applied to a solution side expansion opening (such as a position of (i) in fig. 1) of the high-temperature generator, so that a solution side gap cannot be eliminated; (2) when the tube is welded to the tube sheet, it is easy to apply excessive force to the weld zone (e.g., + (position) in fig. 1), and may even cause hidden cracks, etc.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a high-temperature generator tube plate structure for a lithium bromide water chilling and heating unit, which has good leakage resistance and corrosion resistance.
The technical scheme of the invention is as follows: a tube hole of the tube plate is a taper hole, and the taper angle of the tube hole is equal to or larger than the taper angle of an expansion rod of a tube expander.
Further, the taper angle of the pipe hole = the taper angle of the expansion rod of the expander + (0 ° -20 °).
Preferably, the taper angle of the tube hole = expander taper angle + (5 ° -15 °) of the expander.
Further, the taper hole is formed through machining by a conical drill.
Further, the tube plate and the tube are connected through a tube expander in an expanded mode and are fixed in a welding mode after the expanded mode.
Further, the tube plate and the tube are connected through a tube expander in an expanded mode and are fixed in a welding mode after the expanded connection; and performing secondary expansion connection through a pipe expander after welding.
Further, the pipe is a smoke pipe or a heat exchange pipe.
Further, after the pipe is expanded and connected, the pipe end is conical.
Further, the periphery of the welding position of the tube plate and the tube is coated with a heat insulation coating.
Further, the high-temperature generator comprises a dry back type rear smoke box, the rear smoke box comprises a metal shell, a heat preservation layer is lined in the metal shell, a fireproof heat insulation layer is lined in the heat preservation layer, and a high-reflectivity heat insulation coating is arranged on the inner side of the fireproof heat insulation layer.
The invention has the beneficial effects that: on one hand, the pipe expanding force of the pipe expander expansion opening can be mainly acted on the expansion opening close to the solution side, so that the solution side gap can be eliminated, and the gap corrosion is avoided; the excessive force cannot be applied to the welding position, and the influence on the welding seam is avoided; thereby improving the overall strength; on the other hand, the leakage resistance and the corrosion resistance are greatly improved
The pipe expanding force of the pipe expander opening can be mainly acted on the solution side, so that the solution side gap can be eliminated, and the gap corrosion can be avoided; the excessive force cannot be applied to the welding position, and the welding seam is prevented from being damaged; thereby improving the overall strength; on the other hand, the leakage resistance and the corrosion resistance are greatly improved.
Drawings
FIG. 1 is a schematic diagram of a prior art configuration;
FIG. 2 is a schematic structural diagram of a high temperature generator according to an embodiment of the present invention;
FIG. 3 is a schematic view of the connection between the tube plate and the smoke tube according to the embodiment of the present invention;
FIG. 4 is a schematic structural view of tube holes in a tube sheet according to an embodiment of the present invention.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
As shown in fig. 2: a high-temperature generator tube plate structure for a lithium bromide cold-warm water unit is disclosed, wherein the high-temperature generator comprises an inner cylinder body 1, an outer cylinder body 2, a tube plate 3, a plurality of smoke tubes 4, a front smoke box and a rear smoke box 5, wherein the plurality of smoke tubes 4 are arranged between the outer cylinder body 2 and the inner cylinder body 1, and the front end and the rear end of each smoke tube 4 are respectively connected with the tube plate 3 in a welding mode; the burner 6 is inserted into the inner cylinder 1, and sprays out flame and enters the smoke tube to boil the lithium bromide dilute solution around the smoke tube 4, so as to generate refrigerant steam and concentrate the solution.
The joint of the tube plate 3 and the smoke tube 4 at the front and the back sides of the solution side of the high-temperature generator generally adopts welding technology. Due to the need of tube penetration, the outer diameter of the smoke tube 4 must be slightly smaller than the diameter of the tube hole of the tube plate 3, which easily causes a high possibility of forming a gap after welding, therefore, the gap can be eliminated by connecting the smoke tube 4 and the tube plate 3 by using a tube expansion technology.
As shown in fig. 3: in this embodiment, the pipe hole 31 of the tube plate 3 is a tapered hole, and the taper angle of the pipe hole 31 is equal to or greater than the taper angle of the expansion rod 71 of the tube expander 7, so that the tube expansion force of the tube expander expansion opening mainly acts on the solution side (e.g., (r) position in fig. 3), the gap on the solution side can be eliminated, and excessive force cannot be applied to the welding position (e.g., (r) position in fig. 3).
Specifically, the taper hole size of this embodiment tube sheet 3 stretches into the direction grow gradually along the tobacco pipe for the pore is greater than the size of solution side with the size of tobacco pipe splice, like this, the expander rod 71 that gets into from the pipe end of tobacco pipe when carrying out the expand tube to the tobacco pipe, the pore size of tube sheet is less in the solution side, the size that is close to welding seam 8 department is great, will make tobacco pipe 4 and tube sheet 3 at solution side position expanded joint sealed better, avoid producing the gap and lead to lithium bromide solution to corrode it, and welding position department also can not receive too big power, thereby prevent production such as recessive crackle. After expansion joint, the pipe end of the smoke pipe is expanded and jointed into a cone shape, so that the smoke pipe and the pipe plate are relatively fixed, welding is convenient to implement, and the integral strength is further improved.
As shown in fig. 4: in this embodiment, the tube hole taper angle α of the tube plate 3 is an angle between the inclined surface of the tube hole 31 and a horizontal plane, and the expansion rod taper angle β of the tube expander 7 is an angle between the end inclined surface of the expansion rod and the horizontal plane, as shown in fig. 4. Preferably, the taper angle α of the tube hole 31 = the expander taper angle β + (0 ° -20 °) of the expander, so that the taper angle of the tube hole is equal to or slightly greater than the expander taper angle of the expander. If the taper angle of the pipe hole is too large, the pipe expanding difficulty is increased, and the sealing performance between the smoke pipe and the pipe plate is also reduced. More preferably, the taper angle α of the tube hole = the expander taper angle β + (5 ° -15 °), and still more preferably, the taper angle α of the tube hole = the expander taper angle β + (8 ° -12 °).
In this embodiment, the taper hole is directly machined into a taper hole by a taper drill.
The connection mode of the tube plate 3 and the smoke tube 4 in the embodiment comprises the following two modes:
the first method comprises the following steps: the tube plate 3 and the smoke tube 4 are expanded and connected through the tube expander 7, so that a gap between the smoke tube and the tube plate (which is obviously less than 0.02 mm) can be eliminated, gap corrosion is avoided (wherein the gap corrosion refers to very serious corrosion generated in the gap under the condition that the width of the gap is 0.025-0.1 mm; some media cannot be corroded but the gap can be corroded), the smoke tube and the tube plate are relatively fixed, welding is convenient to implement, and the overall strength is also convenient to improve; and then welding the tube plate and the smoke tube to ensure the sealing performance and improve the overall strength.
Because the smoke tube 4 and the tube plate 3 are connected by adopting a welding technology, the requirement on sealing performance can be met, but no weld defect and no gap can be ensured, and the forming quality of the weld 8 on one side of the solution cannot be effectively detected, therefore, in order to completely ensure no gap, the second method is preferably adopted in the embodiment, and specifically: the tube plate 3 and the smoke tube 4 are expanded and connected through the tube expander 7, then the tube plate and the smoke tube are welded, and then secondary expansion (namely expansion compensation) is carried out after welding, so that expansion (primary expansion) looseness possibly caused by heat influence of welding is eliminated, a new gap possibly generated is eliminated, and further leakage resistance and corrosion resistance are greatly improved.
In addition, due to the position of the rear tube plate 3 of the high-temperature generator, the temperature of the flame side of the high-temperature generator is close to 1000 ℃ at most, which can cause the burning loss of metal materials; the heated area of the position is large, so that the flow of the lithium bromide solution is easily blocked, and the measured local temperature of the solution can exceed 200 ℃, thereby causing the corrosion of metal materials; and the position belongs to a welding heat affected zone, the metal microstructure is damaged by welding, and the corrosion resistance is reduced. Therefore, in the embodiment, the high-temperature-resistant heat-insulating coating is coated around the welding position of the rear tube plate 3 and the smoke tube 4 of the high-temperature generator, so that on one hand, the welding flux at the welding seam can be prevented from being influenced by high temperature to generate tissue damage, and the connection is not firm; on the other hand, the etching rate can be reduced.
Furthermore, the existing dry-back type rear smoke box adopts a metal shell (generally a steel shell), an insulating layer (generally aluminum silicate fiber cotton) is lined in the metal shell, and a fireproof heat-insulating layer (generally high-alumina cement and high-alumina aggregate) is lined in the insulating layer. Because the internal temperature of the rear smoke box 5 is high, the rear smoke box is made of a fire-resistant heat-insulating material, the fuel can be fully combusted, the smoke emission is reduced, because the rear smoke box of the high-temperature generator is very high in temperature, quite a lot of heat is always transferred to the metal shell of the rear smoke box, the temperature can exceed 65 ℃, the energy is wasted, and the danger of being scalded exists. However, the structure can not preserve heat of the metal shell of the rear smoke box, otherwise, the heat of the fireproof heat-insulating layer of the rear smoke box can not be transferred, so that the temperature is increased, the fireproof cement and the aluminum silicate fiber cotton can be burnt down, even the metal shell is in a red state, and the strength and the corrosion resistance are greatly reduced, even the metal shell is burnt down.
Therefore, the rear smoke box 5 of the embodiment comprises a metal shell, wherein the metal shell is lined with a heat insulation layer, a fire-resistant heat insulation layer is lined in the heat insulation layer, and a high-reflectivity heat insulation coating is arranged on the inner side of the fire-resistant heat insulation layer, so that on one hand, the fire-resistant heat insulation layer and the heat insulation layer are more durable, and the service life is prolonged; on the other hand, the heat loss of the whole unit is reduced, the heat efficiency is improved, energy conservation and emission reduction are realized, the temperature of the outer side of the metal shell of the rear smoke box is greatly reduced, and the scalding danger is avoided. The emissivity coefficient of the heat-insulating coating of the embodiment is lower than that of the fire-resistant heat-insulating layer, and preferably is less than or equal to 0.4.
Claims (10)
1. A high-temperature generator tube plate structure for a lithium bromide cold-warm water unit is characterized in that tube holes of the tube plate are taper holes, and the taper angle of the tube holes is equal to or larger than the taper angle of an expansion rod of a tube expander.
2. The high temperature generator tube plate structure for the lithium bromide cold and warm water unit according to claim 1, wherein the taper angle of the tube hole = the taper angle of the expansion rod of the expander + (0 ° -20 °).
3. The high temperature generator tube plate structure for the lithium bromide cold and warm water unit according to claim 2, wherein the taper angle of the tube hole = the taper angle of the expansion rod of the expander + (5 ° -15 °).
4. The tube plate structure of high temperature generator for lithium bromide water chiller according to claim 1, 2 or 3, wherein the taper hole is formed by a conical drill.
5. The tube sheet structure of the high temperature generator for the lithium bromide cold and warm water unit as claimed in claim 1, wherein the tube sheet and the tube are connected by expansion joint through a tube expander and are fixed by welding after expansion joint.
6. The tube plate structure of the high-temperature generator for the lithium bromide cold-warm water unit according to claim 1, wherein the tube plate and the tube are connected by a tube expander in an expanded manner and are fixed by welding after the expanded connection; and performing secondary expansion connection through a pipe expander after welding.
7. The lithium bromide water heater and chiller according to claim 5 or 6, wherein the tube is a smoke tube or a heat exchange tube.
8. A tube plate structure of a high temperature generator for a lithium bromide water chiller according to claim 5 or 6, characterized in that the tube end is tapered after the tube is expanded.
9. A high temperature generator tube sheet structure for lithium bromide water chilling and heating units according to claim 5 or 6, characterized in that the tube sheet and tube welding position is coated with thermal insulation coating.
10. A high-temperature generator tube plate structure for a lithium bromide cold-warm water unit as claimed in claim 1, 2 or 3, wherein the high-temperature generator comprises a dry-back type rear smoke box, the rear smoke box comprises a metal shell, the metal shell is lined with an insulating layer, the insulating layer is lined with a fire-resistant heat-insulating layer, and a high-reflectivity heat-insulating coating is arranged on the inner side of the fire-resistant heat-insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911043653.7A CN110595103B (en) | 2019-10-30 | 2019-10-30 | High-temperature generator tube plate structure for lithium bromide cold-warm water unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911043653.7A CN110595103B (en) | 2019-10-30 | 2019-10-30 | High-temperature generator tube plate structure for lithium bromide cold-warm water unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110595103A CN110595103A (en) | 2019-12-20 |
| CN110595103B true CN110595103B (en) | 2021-08-31 |
Family
ID=68852067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911043653.7A Active CN110595103B (en) | 2019-10-30 | 2019-10-30 | High-temperature generator tube plate structure for lithium bromide cold-warm water unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110595103B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811160A (en) * | 2020-07-01 | 2020-10-23 | 同方节能装备有限公司 | Anticorrosion structure of lithium bromide unit water system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202660960U (en) * | 2012-06-19 | 2013-01-09 | 茂名重力石化机械制造有限公司 | Tube bundle expanded joint sealing structure |
| CN105209216A (en) * | 2013-04-18 | 2015-12-30 | 赛斯斯纯净气体公司 | System and method for welding a plurality of small diameter palladium alloy tubes to a common base plate in a space efficient manner |
| CN105414740A (en) * | 2015-12-30 | 2016-03-23 | 哈尔滨工业大学 | Solid-phase diffusion bonding method for integrated expanded jointing and welding of tube sheet structure |
| CN106141000A (en) * | 2015-04-14 | 2016-11-23 | 上海工业锅炉有限公司 | A kind of boiler pipe-expanding device of applicable small space |
| CN106440480A (en) * | 2016-12-12 | 2017-02-22 | 远大空调有限公司 | High-temperature generator for lithium bromide cold and warm water unit and pipe expanding method |
| CN106766343A (en) * | 2016-12-12 | 2017-05-31 | 远大空调有限公司 | A kind of lithium bromide cold and hot water machine group and expansion tube method |
| CN108507221A (en) * | 2017-02-28 | 2018-09-07 | 远大空调有限公司 | A kind of lithium bromide cold and hot water/heat pump unit using full Ti-heat exchanger |
| CN108971710A (en) * | 2018-07-24 | 2018-12-11 | 东方电气(广州)重型机器有限公司 | A kind of connection processing technology of tube-tube plate |
| CN110238489A (en) * | 2019-06-13 | 2019-09-17 | 鲁西工业装备有限公司 | A kind of production of high-temperature heat-exchanging and welding procedure |
-
2019
- 2019-10-30 CN CN201911043653.7A patent/CN110595103B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202660960U (en) * | 2012-06-19 | 2013-01-09 | 茂名重力石化机械制造有限公司 | Tube bundle expanded joint sealing structure |
| CN105209216A (en) * | 2013-04-18 | 2015-12-30 | 赛斯斯纯净气体公司 | System and method for welding a plurality of small diameter palladium alloy tubes to a common base plate in a space efficient manner |
| CN106141000A (en) * | 2015-04-14 | 2016-11-23 | 上海工业锅炉有限公司 | A kind of boiler pipe-expanding device of applicable small space |
| CN105414740A (en) * | 2015-12-30 | 2016-03-23 | 哈尔滨工业大学 | Solid-phase diffusion bonding method for integrated expanded jointing and welding of tube sheet structure |
| CN106440480A (en) * | 2016-12-12 | 2017-02-22 | 远大空调有限公司 | High-temperature generator for lithium bromide cold and warm water unit and pipe expanding method |
| CN106766343A (en) * | 2016-12-12 | 2017-05-31 | 远大空调有限公司 | A kind of lithium bromide cold and hot water machine group and expansion tube method |
| CN108507221A (en) * | 2017-02-28 | 2018-09-07 | 远大空调有限公司 | A kind of lithium bromide cold and hot water/heat pump unit using full Ti-heat exchanger |
| CN108971710A (en) * | 2018-07-24 | 2018-12-11 | 东方电气(广州)重型机器有限公司 | A kind of connection processing technology of tube-tube plate |
| CN110238489A (en) * | 2019-06-13 | 2019-09-17 | 鲁西工业装备有限公司 | A kind of production of high-temperature heat-exchanging and welding procedure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110595103A (en) | 2019-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104791759B (en) | For connection fin, method and the boiler being connected between the water cooling tube of boiler water wall | |
| CN110595103B (en) | High-temperature generator tube plate structure for lithium bromide cold-warm water unit | |
| CN103418886B (en) | Technology for welding carbon steel overlaying welding layer of tube plate of high pressure heat exchanger with low carbon steel tube in sealing way | |
| JP2926188B2 (en) | Connectors used for uncooled tubes and tubes to be cooled | |
| US2536039A (en) | Fluid heat exchange installation and method of forming the same | |
| CN105312742A (en) | Welding technology | |
| WO2013155703A1 (en) | Articulated joint type middle-high pressure pipeline connecting piece | |
| CN208620880U (en) | A kind of combined high-temperature heat exchanger | |
| CN210718217U (en) | Anti-corrosion high-temperature generator | |
| CN105157427B (en) | Pipeline and wall socket join structure and its installation method for all types of industries stove | |
| CN206410366U (en) | A kind of anti-liquid hammer finned heat exchanger with damping element | |
| CN208983314U (en) | Water screen tube fin with buffering thermal stress and raising heat exchange efficiency | |
| CN103361473B (en) | Thermal treatment method for preventing stainless steel from being sensitized in water chamber of high-pressure heater | |
| CN210014102U (en) | Electric preheating short pipe for high-temperature hot water pipeline | |
| CN212929121U (en) | High temperature ingot casting heating furnace body thermal short circuit connecting device | |
| CN202546812U (en) | Water cooled wall of boiler furnace | |
| CN102615489B (en) | Connection method of stainless steel fin plate and hole plate | |
| CN218096025U (en) | Wear-resisting water-cooled wall of boiler | |
| CN215372538U (en) | Furnace smoke pipeline nail-grabbing fixing structure | |
| CN113418203B (en) | Membrane type inner-cooling high-temperature furnace smoke pipeline and manufacturing method | |
| CN204554770U (en) | For be connected to boiler water wall water cooling tube between connection fin and boiler | |
| CN204987999U (en) | A fixed structure for nonmetallic heat exchanger | |
| CN219520940U (en) | Welding equipment with cooling function | |
| CN2480707Y (en) | High temp. furnace smoke pipe transited from inner thermal-insulation to outer thermal-insulation | |
| CN204621402U (en) | Reverse flame heating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |