CN204254590U - Steam generating device - Google Patents
Steam generating device Download PDFInfo
- Publication number
- CN204254590U CN204254590U CN201420617456.8U CN201420617456U CN204254590U CN 204254590 U CN204254590 U CN 204254590U CN 201420617456 U CN201420617456 U CN 201420617456U CN 204254590 U CN204254590 U CN 204254590U
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- flue
- steam
- raising plant
- section
- 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.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000446 fuel Substances 0.000 claims abstract description 35
- 238000002485 combustion reaction Methods 0.000 claims abstract description 25
- 239000007921 spray Substances 0.000 claims abstract description 20
- 239000003345 natural gas Substances 0.000 claims abstract description 19
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 3
- 239000003129 oil well Substances 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 17
- 238000011084 recovery Methods 0.000 description 12
- 238000010793 Steam injection (oil industry) Methods 0.000 description 6
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Abstract
The utility model discloses a steam generator, it includes combustion unit and the flue that is linked together with combustion unit, and radiation section heat exchanger and convection current section heat exchanger have been arranged along combustion unit heat of production's flow direction in the flue, still are provided with the superheat section heat exchanger in the flue between radiation section heat exchanger and the convection current section heat exchanger, the utility model discloses a steam generator still includes catch water and spray thrower. The combustion unit comprises a combustion chamber, a fuel system, a natural gas system and a switching device for switching between the fuel system and the natural gas system, wherein the fuel system and the natural gas system are respectively communicated with the combustion chamber, and the combustion chamber is communicated with the flue. The utility model discloses a steam generator has added and has established superheated section, catch water and spray thrower, can produce superheated steam, satisfies the needs of present viscous crude exploitation, has good economic benefits.
Description
Technical field
The utility model belongs to technical field of petroleum extraction, particularly relates to a kind of steam raising plant.
Background technology
Steam raising plant is widely used in steam injection oil recovery field in thickened oil recovery process.Steam raising plant need by a certain amount of steam injection oil reservoir to realize exploitation to oil.
A kind of steam raising plant such as shown in accompanying drawing 1, it has the water supplying unit 100, pump 101, heat exchanger 102, convection section 103, radiant section 104, fuel element 105 and the steam injection pipeline 106 that connect successively.This steam raising plant can only by heavy crude producing under the saturated vapor Injection Well of generation.But when adopting saturated vapor pouring oil production, because the temperature of saturated vapor is high not enough, therefore the recovery ratio of viscous crude is on the low side.
Along with many round exploitations of viscous crude, it is found that the superheated steam under HTHP is more suitable for the exploitation of viscous crude, improve the recovery ratio of viscous crude.Because Viscosity of Heavy Crude Oil is very responsive to temperature, temperature often raises 8 DEG C ~ 9 DEG C, and viscosity just can reduce by 1 times.If inject oil reservoir with the superheated steam of HTHP to exploit, recovery ratio can reach 50% ~ 70%, and well yield can effectively improve.The key improving recovery ratio improves the quality of steam injecting oil reservoir, and vapor (steam) temperature is higher, and the heat entrained by the steam of unit mass is more, and the efficient heat injecting stratum increases, and output and recovery ratio just can improve.After thickened oil recovery adopts superheated steam note well, recovery ratio significantly improves, and output can increase by 3 ~ 8 times.Therefore, in order to improve the recovery ratio of viscous crude, utilize the superheated steam pouring oil production under HTHP normally to increase the effective way of heavy oil production.
Utility model content
In order to overcome above-mentioned defect of the prior art, technical problem to be solved in the utility model there is provided a kind of steam raising plant.This steam raising plant can produce superheated steam to improve the yield of viscous crude.
Above-mentioned purpose of the present utility model can adopt following technical proposal to realize:
A kind of steam raising plant, it comprises for generation of the fuel element of heat and the flue that is connected with described fuel element, the flow direction that described flue produces heat along described fuel element is placed with radiant section and convection section, the water supplying unit that described steam raising plant also comprises the radiant section heat exchanger being positioned at described radiant section at least partly, the convection section heat exchanger being positioned at described convection section at least partly and is connected with the arrival end of described convection section heat exchanger, the port of export of described convection section heat exchanger is connected with the arrival end of described radiant section heat exchanger;
Described flue also has superheat section between described radiant section and described convection section, described steam raising plant also comprises the superheat section heat exchanger being positioned at described superheat section at least partly, steam-water separator and spray thrower, the arrival end of described steam-water separator is connected with the port of export of described radiant section heat exchanger, the steam (vapor) outlet end of described steam-water separator is connected with the arrival end of described superheat section heat exchanger, the arrival end of described spray thrower is connected with the water out end of described steam-water separator with the port of export of described superheat section heat exchanger respectively, the port of export of described spray thrower is connected with oil well,
Described fuel element comprises combustion chamber, fuel system, natural gas system and the switching device shifter for switching between described fuel system and described natural gas system, described fuel system and described natural gas system respectively with described combustion chamber, described combustion chamber is connected with described flue.
Particularly, described convection section heat exchanger comprises First Heat Exchanger and the second heat exchanger; The shell side inlet end of described First Heat Exchanger is connected with described water supplying unit, the shell-side outlet end of described First Heat Exchanger is connected with the arrival end of described second heat exchanger, the port of export of described second heat exchanger is connected with the tube-side inlet end of described First Heat Exchanger, and the tube side port of export of described First Heat Exchanger is connected with the arrival end of described radiant section heat exchanger.
More specifically, described water supplying unit comprises the de-mineralized water source and pump that provide demineralized water, and one end of described pump is connected with described de-mineralized water source, and the other end of described pump is connected with the shell side inlet end of described First Heat Exchanger.
Preferably, described pump is plunger displacement pump or high-pressure pump.
Preferably, the sampler for obtaining the superheated steam that described superheat section heat exchanger produces is provided with between the port of export of described superheat section heat exchanger and the arrival end of described spray thrower.
Further, described fuel system comprises oil supply unit, controls the first control valve of described fuel flow, and described first control valve one end is connected with described oil supply unit, the other end of described first control valve and described combustion chamber.
Further, described natural gas system comprises air supply unit, for carrying out the expansion tube of voltage stabilizing to natural gas and controlling the second control valve of described gas discharge, described second control valve one end is connected with described air supply unit, the other end of described second control valve is connected with described expansion tube, described expansion tube and described combustion chamber.
Preferably, described steam raising plant also comprises the PLC control system for controlling described steam raising plant.
Preferably, the L-shaped arrangement of described flue, described L shape flue has longitudinal part, transverse part and the cross-shaped portion crossing with described longitudinal part and described transverse part, described flue has first end at described longitudinal part and described cross-shaped portion opposite position, described flue has the second end at described transverse part and described cross-shaped portion opposite position, the convection section heat exchanger of described flue is positioned at the first end of described flue at least partly, the radiant section heat exchanger of described flue is positioned at the second end of described flue at least partly, and described flue has changeover portion between its superheat section and radiant section.
The utility model has the advantages that: on original moist steam generating means basis, add superheat section, steam-water separator and spray thrower, can superheated steam be produced like this, effectively improve the utilization rate of note well steam, reduce the operating cost of energy consumption and steam raising plant.Adapt to the new DP technology technology in oil field to the requirements at the higher level of thermal recovery equipment, realize adopting low cost demineralized water to produce the target of high-quality superheated steam pouring oil production, broken the concept of traditional viscous crude steam injection, and there is good economic benefit and social value.
Accompanying drawing explanation
Accompanying drawing described here only for task of explanation, and is not intended to limit scope of disclosure of the present utility model by any way.In addition, the shape of each parts in figure and proportional sizes etc. are only schematic, for helping understanding of the present utility model, are not the shape and the proportional sizes that specifically limit each parts of the utility model.Those skilled in the art, under instruction of the present utility model, can select various possible shape and proportional sizes to implement the utility model as the case may be.
Fig. 1 shows the structural representation of original steam raising plant;
Fig. 2 shows the structural representation of steam raising plant of the present utility model;
Fig. 3 shows fuel element structural representation of the present utility model.
Detailed description of the invention
By reference to the accompanying drawings with the description of the utility model detailed description of the invention, can clearly understand details of the present utility model.But detailed description of the invention of the present utility model described here, only for explaining the purpose of this utility model, and can not to be understood as by any way be to restriction of the present utility model.Under instruction of the present utility model, technical staff can conceive based on distortion possible arbitrarily of the present utility model, and these all should be regarded as belonging to scope of the present utility model.
As shown in Figure 2, the utility model provides a kind of steam raising plant, it comprises for generation of the fuel element 29 of heat and the flue that is connected with fuel element 29, the flow direction that flue produces heat along fuel element 29 is placed with radiant section 11 and convection section 9, the water supplying unit that steam raising plant also comprises the radiant section heat exchanger 12 being positioned at radiant section 11 at least partly, the convection section heat exchanger being positioned at convection section 9 at least partly and is connected with the arrival end of convection section heat exchanger, the port of export of convection section heat exchanger is connected with the arrival end of radiant section heat exchanger 12.
Flue also has superheat section 13 between radiant section 11 and convection section 9, steam raising plant also comprises the superheat section heat exchanger 14, steam-water separator 15 and the spray thrower 16 that are positioned at superheat section 13 at least partly, the arrival end of steam-water separator 15 is connected with the port of export of radiant section heat exchanger 12, the steam (vapor) outlet end of steam-water separator 15 is connected with the arrival end of superheat section heat exchanger 14, the arrival end of spray thrower 16 is connected with the water out end of steam-water separator 15 with the port of export of superheat section heat exchanger 14 respectively, and the port of export of spray thrower 16 is connected with oil well 17.
Fuel element 29 comprises combustion chamber 18, fuel system, natural gas system and the switching device shifter (not shown) for switching between fuel system and natural gas system, fuel system and natural gas system are connected with combustion chamber 18 respectively, and combustion chamber 18 is connected with flue.
Particularly, the housing of flue is formed by Plate Welding, and the internal face of housing is provided with flame-proof thermal insulation material, and the housing of convection section 9 flue and the housing of radiant section 11 flue are spatially mutually vertical.
Particularly, the L-shaped arrangement of flue, L shape flue has longitudinal part, transverse part and the cross-shaped portion crossing with longitudinal part and transverse part, flue has first end 26 at longitudinal part and cross-shaped portion opposite position, flue has the second end 27 at transverse part and cross-shaped portion opposite position, the convection section heat exchanger of flue is positioned at the first end 26 of flue at least partly, and the radiant section heat exchanger 12 of flue is positioned at the second end 27 of flue at least partly, and flue has changeover portion 24 between its superheat section 13 and radiant section 11.
Further, the pipeline of convection section heat exchanger, radiant section heat exchanger 12 and superheat section heat exchanger 14 is all the one way tube bank be back and forth formed by connecting by the U-shaped finned tube of many row of horizontal, and the advantage of arrangement is like this that area of dissipation is large, improves the thermal efficiency.
Further, convection section heat exchanger comprises First Heat Exchanger 28 and the second heat exchanger 10; Shell side 4 arrival end 5 of First Heat Exchanger 28 is connected with water supplying unit, shell side 4 port of export 6 of First Heat Exchanger 28 is connected with the arrival end of the second heat exchanger 10, the port of export of the second heat exchanger 10 is connected with tube side 3 arrival end 7 of First Heat Exchanger 28, and tube side 3 port of export 8 of First Heat Exchanger 28 is connected with the arrival end of radiant section heat exchanger 12.Such structure can utilize the water of the heat further heated convection section First Heat Exchanger 28 li of convection section second heat exchanger 10, can economize energy, reduces heat loss.
Particularly, please refer to Fig. 3, two cover combustion systems are provided with in fuel element 29, a set of is natural gas system, and a set of is fuel system, and is provided with the switching device shifter (not shown) that can switch different system between the two systems, this switching device shifter is electromagnetic switching valve or triple valve transfer valve, it when natural gas undersupply, can be opened fuel system and makes combustion chamber 18 proceed burning work, for flue provides heat.Incessantly for flue provides adequate heat, and then sufficient superheated steam can be produced because the utility model is provided with two cover combustion systems, improve the efficiency of steam note well.
The beneficial effects of the utility model are: compared with original steam generator, steam raising plant of the present utility model owing to having added superheat section heat exchanger 14, steam-water separator 15 and spray thrower 16 on steam raising plant, superheated steam can be produced, meet the needs of current thickened oil recovery, realize adopting low cost demineralized water to produce the target of high-quality superheated steam pouring oil production, break the concept of traditional viscous crude steam injection, and there is good economic benefit and social value.
Preferably, water supplying unit comprises the de-mineralized water source 1 and pump 2 that provide demineralized water, and one end of pump 2 is communicated with de-mineralized water source 1, and the other end of pump 2 is communicated with shell side 4 arrival end 5 of First Heat Exchanger 28.Said pump 2 is preferably plunger displacement pump or high-pressure pump.
Preferably, the sampler 25 for obtaining the superheated steam that superheat section heat exchanger 14 produces is provided with between the port of export of superheat section heat exchanger 14 and the arrival end of spray thrower 16.The sample that sampler 25 can extract superheat section steam carries out the design parameter of the mass dryness fraction, temperature etc. of testing superheated steam, if these parameters meet the demands, superheated steam then can be made to note well by after spray thrower 16, if do not met the demands, then should the index of correlation of corresponding each system of adjustment.
Preferably, fuel system comprises oil supply unit 22, controls the other end connection combustion chamber 18 of first control valve 23, first control valve 23 one end connection oil supply unit 22, first control valve 23 of fuel flow.The other end of second control valve 20, second control valve 20 one end connection air supply unit 19, second control valve 20 that natural gas system comprises air supply unit 19, expansion tube 21 and controls gas discharge connects expansion tube 21, and expansion tube 21 is communicated with combustion chamber 18.
Preferably, steam raising plant also comprises the PLC control system for controlling steam raising plant.Adopt PLC control system can control whole steam raising plant, simple to operate, security is high.
The course of work of steam raising plant of the present utility model is as follows:
First demineralized water is provided by de-mineralized water source 1, demineralized water pumps into shell side 4 arrival end 5 into convection section First Heat Exchanger 28 through plunger displacement pump or high-pressure pump, demineralized water flows through the pipeline of convection section First Heat Exchanger 28 afterwards, flowed out by shell side 4 port of export 6 of convection section First Heat Exchanger 28, the coolant-temperature gage at this moment flowed out is approximately about 110-120 DEG C.
Then the water through preheating enters in convection section second heat exchanger 10, enter after convection section second heat exchanger 10 absorbs heat in the tube side 3 of convection section First Heat Exchanger 28 as thermal source heating water again, namely the entrance flowing through convection section second heat exchanger 10 enters into the pipeline of convection section second heat exchanger 10, then the outlet flowing through convection section second heat exchanger 10 enters tube side 3 entrance 7 of convection section First Heat Exchanger 28 again, and the water finally by convection section 9 heating exports 8 by the tube side 3 of convection section First Heat Exchanger 28 and flows in the radiant section heat exchanger 12 of steam raising plant.
Water enters steam-water separator 15 after radiant section heat exchanger 12 heats, water in radiant section heat exchanger 12 is separated by steam-water separator 15, isolate saturated vapor and saturation water, the saturated vapor separated in steam-water separator 15 enters into superheat section heat exchanger 14 again and continues heating, the superheat steam temperature flowed out afterwards reaches about 450 DEG C, enter again in the sampler 25 of test mass dryness fraction and test, flow in spray thrower 16 afterwards, now in steam-water separator 15, isolated saturation water also enters in spray thrower 16, the superheated steam that saturation water produces with superheat section heat exchanger 14 mixes in spray thrower 16, temperature is reduced to 380 DEG C and meets the requirement of note well, then by heavy crude producing under this superheated steam Injection Well.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (9)
1. a steam raising plant, it comprises for generation of the fuel element of heat and the flue that is connected with described fuel element, the flow direction that described flue produces heat along described fuel element is placed with radiant section and convection section, the water supplying unit that described steam raising plant also comprises the radiant section heat exchanger being positioned at described radiant section at least partly, the convection section heat exchanger being positioned at described convection section at least partly and is connected with the arrival end of described convection section heat exchanger, the port of export of described convection section heat exchanger is connected with the arrival end of described radiant section heat exchanger;
It is characterized in that: described flue also has superheat section between described radiant section and described convection section, described steam raising plant also comprises the superheat section heat exchanger being positioned at described superheat section at least partly, steam-water separator and spray thrower, the arrival end of described steam-water separator is connected with the port of export of described radiant section heat exchanger, the steam (vapor) outlet end of described steam-water separator is connected with the arrival end of described superheat section heat exchanger, the arrival end of described spray thrower is connected with the water out end of described steam-water separator with the port of export of described superheat section heat exchanger respectively, the port of export of described spray thrower is connected with oil well,
Described fuel element comprises combustion chamber, fuel system, natural gas system and the switching device shifter for switching between described fuel system and described natural gas system, described fuel system and described natural gas system respectively with described combustion chamber, described combustion chamber is connected with described flue.
2. steam raising plant according to claim 1, is characterized in that: described convection section heat exchanger comprises First Heat Exchanger and the second heat exchanger; The shell side inlet end of described First Heat Exchanger is connected with described water supplying unit, the shell-side outlet end of described First Heat Exchanger is connected with the arrival end of described second heat exchanger, the port of export of described second heat exchanger is connected with the tube-side inlet end of described First Heat Exchanger, and the tube side port of export of described First Heat Exchanger is connected with the arrival end of described radiant section heat exchanger.
3. steam raising plant according to claim 2, it is characterized in that: described water supplying unit comprises the de-mineralized water source and pump that provide demineralized water, one end of described pump is connected with described de-mineralized water source, and the other end of described pump is connected with the shell side inlet end of described First Heat Exchanger.
4. steam raising plant according to claim 3, is characterized in that: described pump is plunger displacement pump or high-pressure pump.
5. steam raising plant according to claim 1, is characterized in that: be provided with the sampler for obtaining the superheated steam that described superheat section heat exchanger produces between the port of export of described superheat section heat exchanger and the arrival end of described spray thrower.
6. steam raising plant according to claim 1, it is characterized in that: described fuel system comprises oil supply unit, controls the first control valve of described fuel flow, described first control valve one end is connected with described oil supply unit, the other end of described first control valve and described combustion chamber.
7. steam raising plant according to claim 1, it is characterized in that: described natural gas system comprises air supply unit, for carrying out the expansion tube of voltage stabilizing to natural gas and controlling the second control valve of described gas discharge, described second control valve one end is connected with described air supply unit, the other end of described second control valve is connected with described expansion tube, described expansion tube and described combustion chamber.
8. steam raising plant according to claim 1, is characterized in that: described steam raising plant also comprises the PLC control system for controlling described steam raising plant.
9. steam raising plant according to claim 1, it is characterized in that: the L-shaped arrangement of described flue, described L shape flue has longitudinal part, transverse part and the cross-shaped portion crossing with described longitudinal part and described transverse part, described flue has first end at described longitudinal part and described cross-shaped portion opposite position, described flue has the second end at described transverse part and described cross-shaped portion opposite position, the convection section heat exchanger of described flue is positioned at the first end of described flue at least partly, the radiant section heat exchanger of described flue is positioned at the second end of described flue at least partly, described flue has changeover portion between its superheat section and radiant section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420617456.8U CN204254590U (en) | 2014-10-23 | 2014-10-23 | Steam generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420617456.8U CN204254590U (en) | 2014-10-23 | 2014-10-23 | Steam generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204254590U true CN204254590U (en) | 2015-04-08 |
Family
ID=52958891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420617456.8U Expired - Fee Related CN204254590U (en) | 2014-10-23 | 2014-10-23 | Steam generating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204254590U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915653A (en) * | 2018-06-20 | 2018-11-30 | 中国石油天然气集团有限公司 | Oil field gas injection steam generating system and method |
| CN114963687A (en) * | 2022-04-19 | 2022-08-30 | 北京科技大学 | System and method for generating thick oil gas and steam multi-element fluid |
-
2014
- 2014-10-23 CN CN201420617456.8U patent/CN204254590U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915653A (en) * | 2018-06-20 | 2018-11-30 | 中国石油天然气集团有限公司 | Oil field gas injection steam generating system and method |
| CN108915653B (en) * | 2018-06-20 | 2021-01-29 | 中国石油天然气集团有限公司 | Steam generation system and method for oil field steam injection |
| CN114963687A (en) * | 2022-04-19 | 2022-08-30 | 北京科技大学 | System and method for generating thick oil gas and steam multi-element fluid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105807028A (en) | Test device for desorbing gas by heating coal body through high temperature steam | |
| CN204254590U (en) | Steam generating device | |
| CN106765004B (en) | A kind of solid heat storage electric boiler two-stage heat exchange uphole steam generator heating system | |
| CN205002099U (en) | Oil field steam injection boiler device | |
| CN206831455U (en) | A kind of solid heat storage electric boiler two-stage heat exchange uphole steam generator heating system | |
| CN104196504A (en) | Carbon dioxide pressure injection device for oil production | |
| CN104138212B (en) | Boiler for coffee maker and the coffee machine with the boiler | |
| CN105546842B (en) | Efficient solar flat-board endothermic system | |
| CN204059071U (en) | A kind of synthetic leather post processing hotline heater | |
| CN207059311U (en) | A kind of press cooling device | |
| CN203560880U (en) | Rapid high-temperature steam generator | |
| CN201363710Y (en) | Integrated energy-saving high-temperature and high-pressure steam boiler using electric insulating oil | |
| CN205261506U (en) | Steam circulation system of health preserving wine extraction element | |
| CN204755115U (en) | Heat transfer pressure relief device of engine natural gas | |
| CN103216932B (en) | Fire catridge type gas-fired water heating boiler | |
| CN102759093A (en) | Method for rising boiler steam temperature | |
| CN206616187U (en) | A kind of waste heat of coke oven crude gas heats rich oil device | |
| CN206531277U (en) | A kind of steam-heating system heated for PCB horizontal lines | |
| CN206670055U (en) | A kind of sleeved combined electromagnetic hotline heater | |
| CN206944118U (en) | A kind of low pressure superhigh temperature superheated steam boiler | |
| CN205261512U (en) | Quick clean steam generator | |
| CN105042667B (en) | Superconducting boiler heating, heating system and method suitable for pluralities of fuel | |
| CN204240590U (en) | Heat carrier pipe internal-circulation type heater | |
| CN204084327U (en) | A kind of boiler heat supercharging high temperature hutch water device | |
| CN203857680U (en) | Workshop heating equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 |