CN107631319A - A kind of Smoke-heating device - Google Patents
A kind of Smoke-heating device Download PDFInfo
- Publication number
- CN107631319A CN107631319A CN201710975575.9A CN201710975575A CN107631319A CN 107631319 A CN107631319 A CN 107631319A CN 201710975575 A CN201710975575 A CN 201710975575A CN 107631319 A CN107631319 A CN 107631319A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- pipe group
- coiled
- pipe
- module
- 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.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 38
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 113
- 239000003546 flue gas Substances 0.000 claims abstract description 113
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 239000002253 acid Substances 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 abstract description 8
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 241000883990 Flabellum Species 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
Abstract
The invention discloses a kind of Smoke-heating device, including base, support column is installed at left and right sides of base, a crossbeam is supported with per collateral dagger, top plate is shelved between two crossbeams, flue gas module is hung with top plate, it is in the spaced flue gas pipe group in left and right that flue gas module, which includes two layers along flow of flue gas direction, and flue gas pipe group includes upper collecting chamber, lower header and the coiled pipe of some connection upper collecting chambers and lower header；Two layers of flue gas Guan Zuzhong all coiled pipes are collectively forming the coiled pipe group that some rows are in time interval arrangement, arranged between the coiled pipe of adjacent two rows coiled pipe group in front and rear parallel misalignment, all coiled pipes are made to be collectively forming the cigarette channel excessively of complications, all upper collecting chambers are connected with main steam range, and the lower header is connected with bilge main.The present invention has the advantages of quickly heating up to the outlet neat stress on absorption tower more than acid dew-point temperature.
Description
Technical field
The present invention relates to for low temperature electrostatic precipitation technology field, and in particular to a kind of to be used for the net cigarette in the outlet on absorption tower
The Smoke-heating device that gas quickly heats up to more than acid dew-point temperature.
Background technology
Low temperature electric precipitation dedusting technology is one of current state-of-the-art dedusting technology, and its course of work is：First pass through and change
Thermal drops to flue-gas temperature below acid dew-point temperature, then carries out desulfurization to flue gas, then again by flue gas after desulfurization through inhaling
Receive tower and be discharged into chimney of electric plant, then discharged through chimney of electric plant.No matter dry desulfurization or wet desulphurization, the outlet neat stress on absorption tower
Flue-gas temperature be consistently lower than acid dew-point temperature and water capacity is very high, typically all at 45 DEG C ~ 52 DEG C or so, and the cigarette after desulfurization
Coal combustion is included in gas and prepares the strong corrosive material such as institute's chloride and fluoride in water from desulfurizer slurry.Due to cigarette
The corrosive grade of gas can gradually step up with the reduction of flue-gas temperature, and especially flue-gas temperature after desulfurization is less than acid dew point
During temperature, the corrosive grade of flue gas will increase more severe, and be malleation before chimney（About 200Pa）, therefore flue gas
Corrosivity and permeability greatly enhance.Therefore, if such flue gas is directly discharged into air by chimney of electric plant to cause
Following consequence：（1）Because cigarette temperature is too low, it is unfavorable for the lifting of flue gas, flue gas velocity is slow；（2）Due in flue gas water capacity it is high and
Corrosive grade is high, and air-introduced machine flabellum can be caused to be stained with ash and air-introduced machine and chimney corrosion, influences the safety of air-introduced machine and chimney
Operation.Thus need a kind of flue gas that the outlet neat stress on absorption tower can be quickly heated up to more than acid dew-point temperature of invention badly
Device.
The content of the invention
The outlet neat stress of desulfurizing tower can be quickly heated up to more than acid dew-point temperature it is an object of the invention to provide a kind of
Smoke-heating device.
To achieve the above object, present invention employs following technical scheme：A kind of described Smoke-heating device, including bottom
Seat, there are some support columns the left and right sides of base is vertically-mounted from front to back, all support columns per side are supported with jointly
A piece crossbeam, it is shelved with one piece of top plate jointly between two crossbeams, flue gas module, the flue gas is hung with top plate
It is in the spaced flue gas pipe group in left and right that heating module, which includes two layers along flow of flue gas direction, the flue gas pipe group
Including upper collecting chamber, lower header and the coiled pipe of some connection upper collecting chambers and lower header；Two layers flue gas Guan Zuzhong's is all
Coiled pipe is collectively forming the coiled pipe group that some rows are in time interval arrangement, before being between the coiled pipe of adjacent two rows coiled pipe group
Parallel misalignment arranges afterwards, all coiled pipes of two layers of flue gas pipe group is collectively forming the cigarette channel excessively of complications, the flue gas
The upper collecting chamber of all flue gas pipe groups is connected with main steam range in heating module, all cigarettes in the flue gas module
The lower header of gas heating tube group is connected with bilge main.
Further, foregoing a kind of Smoke-heating device, wherein：It is arranged at intervals from up to down in flue gas module
There are some anti-sway components to prevent the coiled pipe in flue gas module from all around swinging, the anti-sway component includes：
Two energy clamp the anti-swing pipe of flue gas module in the relative clamping shape in left and right, and some pieces are connected between two anti-swing pipes and is prevented
Wobble plate, the corresponding row's coiled pipe group of every piece of anti-wobble plate, is provided with and the coiled pipe in corresponding coiled pipe group in every piece of anti-wobble plate
The consistent geometrical clamp of quantity, each geometrical clamp in every piece of anti-wobble plate clamp a coiled pipe in corresponding coiled pipe group respectively.
Further, foregoing a kind of Smoke-heating device, wherein：It is provided with base and adds to Auxiliary support flue gas
The elastic supporting mechanism of thermal modules, elastic supporting mechanism is by some bullets that base and flue gas module are arranged in time interval
Spring support component forms, and the spring supporting component includes：Some springs on base, the support being downwardly against on spring
Flat board, two pieces of supporting vertical plates on support flat board, every piece of supporting vertical plate correspond to one flue gas of support upwards respectively
The lower header of pipe group.
Further, foregoing a kind of Smoke-heating device, wherein：Flue gas module makes two layers of cigarette by upper U-tube
The upper collecting chamber of gas heating tube group is connected with main steam range, the side pipe end of the upper U-tube and one layer of flue gas pipe group
The leading portion of upper collecting chamber be connected, the back segment phase of the opposite side pipe end of upper U-tube and the upper collecting chamber of another layer of flue gas pipe group
Connection, the middle part of upper U-tube is connected with main steam range.
Further, foregoing a kind of Smoke-heating device, wherein：Flue gas module makes two row cigarettes by lower U-tube
The lower header of gas heating tube group is connected with bilge main, the side pipe end of the lower U-tube and one layer of flue gas pipe group
The leading portion of lower header be connected, the back segment phase of the opposite side pipe end of lower U-tube and the lower header of another layer of flue gas pipe group
Connection, the middle part of lower U-tube is connected with bilge main.
Further, foregoing a kind of Smoke-heating device, wherein：Bilge main from water inlet end to water side gradually downward
Tilt.
Further, foregoing a kind of Smoke-heating device, wherein：Specific connection between flue gas module and top plate
Structure is：Boatswain chair is connected between two upper collecting chambers of flue gas module, boatswain chair is mutually fixed by suspension rod with top plate.
The implementation of Pass through above-mentioned technical proposal, the beneficial effects of the invention are as follows：Simple in construction, dismounting is easy to maintenance, heating
Rapidly, heating is quick, and the outlet neat stress on absorption tower can be heated quickly to 35~45 DEG C of rise before chimney of electric plant is flowed into, make
Outlet neat stress is heated to more than acid dew-point temperature before chimney of electric plant is flowed into, and not only contributes to the lifting of flue gas, accelerates row
Cigarette speed, and the water capacity and corrosive grade of flue gas can be greatly reduced, and then can effectively reduce air-introduced machine flabellum and be stained with ash, drop
Corrosion of the low flue gas to air-introduced machine and chimney, is advantageous to the safe operation of air-introduced machine and chimney.
Brief description of the drawings
Fig. 1 is a kind of structural representation of Smoke-heating device of the present invention.
Fig. 2 is the structural representation in Fig. 1 left view direction.
Fig. 3 is the enlarged diagram at the H positions shown in Fig. 1.
Fig. 4 is the enlarged diagram at the F positions shown in Fig. 1.
Fig. 5 is the structural representation of the A-A sections shown in Fig. 1.
Fig. 6 is the enlarged diagram at the G positions shown in Fig. 5.
Fig. 7 is the connection relationship diagram that Fig. 1 looks up lower U-tube and two lower headers shown in direction.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, a kind of described Smoke-heating device, including base 1,
The top left side of base 1 is vertically-mounted from front to back some left support posts 2, and all left support posts 2 in left side support jointly
Have a left crossbeam 3, have a some right support posts 21 the top right side of base 1 is vertically-mounted from front to back, right side it is all
Right support post 21 is supported with a right crossbeam 31 jointly, is shelved with one piece of top plate 4 jointly between left crossbeam 3 and right crossbeam 31,
Flue gas module is hung with the top plate 4, and the flue gas module includes two row along flow of flue gas direction between left and right
Every the flue gas pipe group of arrangement, the flue gas pipe group includes upper collecting chamber 5, lower header 6 and some connection upper collecting chambers 5
With the coiled pipe group 7 of lower header 6；In the flue gas module upper collecting chamber 5 of all flue gas pipe groups with main steam range 8
It is connected, the lower header 6 of all flue gas pipe groups is connected with bilge main 9 in the flue gas module；In this reality
To apply in example, two layers of flue gas Guan Zuzhong all coiled pipes 7 are collectively forming the coiled pipe group that some rows are in time interval arrangement,
Arranged between the coiled pipe 7 of adjacent two rows coiled pipe group in front and rear parallel misalignment, make all snakelike of two layers flue gas pipe group
Pipe is collectively forming the cigarette channel excessively of complications, so one side, and the unordered neat stress of the script discharged from absorption tower is by successively
It can become orderly after crossing cigarette channel, make velocity of flue gas also can step-down；On the other hand, the heat exchange of flue gas and coiled pipe can be increased
Time, be advantageous to quick heating of the flue gas module to flue gas；In the present embodiment, in flue gas module from up to down
It is arranged at intervals with some anti-sway components to prevent the coiled pipe in flue gas module from all around swinging, described anti-sway group
Part includes：Two energy clamp the anti-swing pipe 10 of flue gas module in the relative clamping shape in left and right, connect between two anti-swing pipes 10
Be connected to some to anti-wobble plate 11, the corresponding row's coiled pipe group of every piece of anti-wobble plate 11, be provided with every piece of anti-wobble plate 11 with it is corresponding
The consistent geometrical clamp 111 of the quantity of coiled pipe 7 in coiled pipe group, each geometrical clamp 111 in every piece of anti-wobble plate 11 are clamped respectively
A coiled pipe 7 in corresponding coiled pipe group, above-mentioned anti-sway modular construction is simple, convenient to install and maintain, can effectively prevent flue gas
Coiled pipe in heating module occurs all around to swing during flue gas is heated, and improves the kinetic stability of equipment；
In the present embodiment, it is provided with base 1 to the elastic supporting mechanism of Auxiliary support flue gas module, elastic supporting mechanism
Base is arranged at by some in time interval and the spring supporting component of flue gas module forms, the spring supporting component bag
Include：Some springs 12 on base, the support flat board 13 being downwardly against on spring 12, two on support flat board 13
Block supporting vertical plate 14, every piece of supporting vertical plate 14 correspond to the lower header 6 of one flue gas pipe group of support upwards respectively, so can be with
It is fixed between base and top plate with making flue gas module more safety and firmness；In the present embodiment, flue gas module is led to
Crossing U-tube 15 makes the upper collecting chamber 6 of two row flue gas pipe groups be connected with main steam range 8, the side of the upper U-tube 15
Pipe end is connected with the leading portion of the upper collecting chamber 5 of a row flue gas pipe group, the opposite side pipe end of upper U-tube 15 and another row flue gas
The back segment of the upper collecting chamber 5 of heating tube group is connected, and the middle part of upper U-tube 15 is connected with main steam range 8, so can be further
Improve the integrated connection steadiness of flue gas module；In the present embodiment, flue gas module makes two row by lower U-tube 16
The lower header 6 of flue gas pipe group is connected with bilge main 9, and side pipe end and the row flue gas of the lower U-tube 16 add
The leading portion of the lower header 6 of heat pipe heat is connected, the opposite side pipe end of lower U-tube 16 and the lower header of another row flue gas pipe group
6 back segment is connected, and the middle part of lower U-tube 16 is connected with bilge main 9, so can further improve flue gas module
Integrated connection steadiness；In the present embodiment, bilge main 9 tilts gradually downward from water inlet end to water side, is so easy to
Draining；In the present embodiment, the specific attachment structure between flue gas module and top plate 4 is：The two of flue gas module
Boatswain chair 17 is connected between individual upper collecting chamber 5, boatswain chair 17 is fixed by suspension rod 18 and the phase of top plate 4, above-mentioned attachment structure installation and maintenance
It is convenient；
The operation principle of the present invention is as follows：
During installation, the neat stress that this Smoke-heating device is installed on to absorption tower exports；It is in use, steam is total constantly through steam
Pipe 8 is passed through U-tube 15, then is distributed through upper U-tube 15 to each upper collecting chamber 5, then enters next part through coiled pipe 7 through each upper collecting chamber 5
Case 6, during steam passes through coiled pipe 7, the steam in coiled pipe 7 constantly can carry out heat with the neat stress discharged from absorption tower
Exchange, so as to by more than the quick heat temperature raising acid dew-point temperature of flue gas, and the steam in coiled pipe 7 can be become with flue gas heat exchange
Enter lower header 6 into condensed water, then bilge main 9 is discharged into through lower U-tube 16.
The beneficial effects of the invention are as follows：Simple in construction, dismounting is easy to maintenance, and heating is rapid, and heating is quick, will quickly can inhale
The outlet neat stress for receiving tower heats 35~45 DEG C of rise before chimney of electric plant is flowed into, and makes outlet neat stress before chimney of electric plant is flowed into
It is heated to more than acid dew-point temperature, not only contributes to the lifting of flue gas, accelerates flue gas velocity, and flue gas can be greatly reduced
Water capacity and corrosive grade, and then can effectively reduce air-introduced machine flabellum and be stained with ash, corrosion of the flue gas to air-introduced machine and chimney is reduced,
Be advantageous to the safe operation of air-introduced machine and chimney.
Claims (7)
- A kind of 1. Smoke-heating device, it is characterised in that：Including base, have the left and right sides of base is vertically-mounted from front to back Some support columns, all support columns per side are supported with a crossbeam, are shelved with one piece jointly between two crossbeams jointly Top plate, is hung with flue gas module on top plate, and the flue gas module includes two layers along flow of flue gas direction in a left side The flue gas pipe group of right septum arrangement, the flue gas pipe group include upper collecting chamber, lower header and some connection upper collecting chambers With the coiled pipe of lower header；Two layers of flue gas Guan Zuzhong all coiled pipes are collectively forming some rows in time interval arrangement Coiled pipe group, arranged in front and rear parallel misalignment between the coiled pipe of adjacent two rows coiled pipe group, make two layers flue gas pipe group What all coiled pipes were collectively forming complications crosses cigarette channel, and the upper collecting chamber of all flue gas pipe groups is equal in the flue gas module It is connected with main steam range, the lower header of all flue gas pipe groups is connected with bilge main in the flue gas module It is logical.
- A kind of 2. Smoke-heating device according to claim 1, it is characterised in that：In flue gas module from up to down It is arranged at intervals with some anti-sway components to prevent the coiled pipe in flue gas module from all around swinging, described anti-sway group Part includes：Two energy clamp the anti-swing pipe of flue gas module in the relative clamping shape in left and right, are connected between two anti-swing pipes Some pieces of anti-wobble plates, the corresponding row's coiled pipe group of every piece of anti-wobble plate, be provided with every piece of anti-wobble plate with corresponding coiled pipe group The consistent geometrical clamp of coiled pipe quantity, each geometrical clamp in every piece of anti-wobble plate clamps one in corresponding coiled pipe group respectively Coiled pipe.
- A kind of 3. Smoke-heating device according to claim 1 or 2, it is characterised in that：It is provided with base to auxiliary The elastic supporting mechanism of support flue gas module is helped, elastic supporting mechanism is arranged at base and flue gas by some in time interval The spring supporting component composition of heating module, the spring supporting component include：Some springs on base, it is downwardly against Support flat board on spring, two pieces of supporting vertical plates on support flat board, every piece of supporting vertical plate correspond to support upwards respectively The lower header of one flue gas pipe group.
- A kind of 4. Smoke-heating device according to claim 1 or 2, it is characterised in that：Flue gas module passes through upper U-shaped Pipe makes the upper collecting chamber of two layers of flue gas pipe group be connected with main steam range, the side pipe end of the upper U-tube and one layer of cigarette The leading portion of the upper collecting chamber of gas heating tube group is connected, the opposite side pipe end of upper U-tube and the upper collection of another layer of flue gas pipe group The back segment of case is connected, and the middle part of upper U-tube is connected with main steam range.
- A kind of 5. Smoke-heating device according to claim 1 or 2, it is characterised in that：Flue gas module passes through lower U-shaped Pipe makes the lower header of two row flue gas pipe groups be connected with bilge main, the side pipe end of the lower U-tube and one layer of cigarette The leading portion of the lower header of gas heating tube group is connected, the opposite side pipe end of lower U-tube and the next part of another layer of flue gas pipe group The back segment of case is connected, and the middle part of lower U-tube is connected with bilge main.
- A kind of 6. Smoke-heating device according to claim 5, it is characterised in that：Bilge main is from water inlet end to water side Tilt gradually downward.
- A kind of 7. Smoke-heating device according to claim 1 or 2, it is characterised in that：Flue gas module and top plate it Between specific attachment structure be：Boatswain chair is connected between two upper collecting chambers of flue gas module, boatswain chair passes through suspension rod and top Plate is mutually fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710975575.9A CN107631319A (en) | 2017-10-19 | 2017-10-19 | A kind of Smoke-heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710975575.9A CN107631319A (en) | 2017-10-19 | 2017-10-19 | A kind of Smoke-heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107631319A true CN107631319A (en) | 2018-01-26 |
Family
ID=61105541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710975575.9A Pending CN107631319A (en) | 2017-10-19 | 2017-10-19 | A kind of Smoke-heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107631319A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413785A (en) * | 2018-04-17 | 2018-08-17 | 江苏龙净节能科技有限公司 | A kind of titanium heat-exchanger rig |
| CN109413779A (en) * | 2018-11-19 | 2019-03-01 | 苏州奥德机械有限公司 | A kind of diamond shape arrangement formula electric heater unit |
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| JP2001108381A (en) * | 1999-10-08 | 2001-04-20 | Mitsui Eng & Shipbuild Co Ltd | Hot air heater |
| CN2881354Y (en) * | 2005-12-08 | 2007-03-21 | 大庆石油管理局 | Coal saving device of boiler |
| CN201218677Y (en) * | 2008-05-23 | 2009-04-08 | 攀枝花新钢钒股份有限公司 | Shell-and-tube heat exchanger |
| CN201866761U (en) * | 2010-11-23 | 2011-06-15 | 杨宇珂 | Combustion furnace |
| CN203940411U (en) * | 2014-06-25 | 2014-11-12 | 伟明环保设备有限公司 | A kind of arrangement of convection superheater |
| CN104623985A (en) * | 2015-01-30 | 2015-05-20 | 福建龙净环保股份有限公司 | Flue gas heating device and flue gas processor thereof |
| CN107062956A (en) * | 2017-05-12 | 2017-08-18 | 江苏龙净节能科技有限公司 | A kind of spiral finned tube heat-exchanger rig utilized for Large Copacity fume afterheat |
| CN207365089U (en) * | 2017-10-19 | 2018-05-15 | 江苏龙净节能科技有限公司 | A kind of Smoke-heating device |
-
2017
- 2017-10-19 CN CN201710975575.9A patent/CN107631319A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001108381A (en) * | 1999-10-08 | 2001-04-20 | Mitsui Eng & Shipbuild Co Ltd | Hot air heater |
| CN2881354Y (en) * | 2005-12-08 | 2007-03-21 | 大庆石油管理局 | Coal saving device of boiler |
| CN201218677Y (en) * | 2008-05-23 | 2009-04-08 | 攀枝花新钢钒股份有限公司 | Shell-and-tube heat exchanger |
| CN201866761U (en) * | 2010-11-23 | 2011-06-15 | 杨宇珂 | Combustion furnace |
| CN203940411U (en) * | 2014-06-25 | 2014-11-12 | 伟明环保设备有限公司 | A kind of arrangement of convection superheater |
| CN104623985A (en) * | 2015-01-30 | 2015-05-20 | 福建龙净环保股份有限公司 | Flue gas heating device and flue gas processor thereof |
| CN107062956A (en) * | 2017-05-12 | 2017-08-18 | 江苏龙净节能科技有限公司 | A kind of spiral finned tube heat-exchanger rig utilized for Large Copacity fume afterheat |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413785A (en) * | 2018-04-17 | 2018-08-17 | 江苏龙净节能科技有限公司 | A kind of titanium heat-exchanger rig |
| CN108413785B (en) * | 2018-04-17 | 2024-04-19 | 江苏龙净节能科技有限公司 | Titanium heat exchange device |
| CN109413779A (en) * | 2018-11-19 | 2019-03-01 | 苏州奥德机械有限公司 | A kind of diamond shape arrangement formula electric heater unit |
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