CN203411515U - Gasifier chilling chamber - Google Patents
Gasifier chilling chamber Download PDFInfo
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- CN203411515U CN203411515U CN201320423739.4U CN201320423739U CN203411515U CN 203411515 U CN203411515 U CN 203411515U CN 201320423739 U CN201320423739 U CN 201320423739U CN 203411515 U CN203411515 U CN 203411515U
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- shock chamber
- eddy flow
- water jet
- downtake
- jet standpipe
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Abstract
The utility model provides a gasifier chilling chamber. The gasifier chilling chamber comprises a descending pipe, a cyclonal water spraying pipe, a cyclonal air exhausting pipe and a bubble breaking water spraying pipe, wherein the cyclonal air exhausting pipe is arranged at the lower end of the descending pipe; the inlet of the cyclonal air exhausting pipe is connected with the descending pipe; the outlet direction of the cyclonal air exhausting pipe is the same as the tangential direction of the descending pipe. The cyclonal water spraying pipe is arranged at the lower part of the chilling chamber; the inlet of the cyclonal water spraying pipe extends out of the chilling chamber, and an outlet is formed in the chilling chamber; the outlet direction of the cyclonal water spraying pipe is the same as the outlet direction of the cyclonal air exhausting pipe; the peripheral direction of the bubble breaking water spraying pipe is evenly distributed on the upper shell of the chilling chamber; the bubble breaking water spraying pipe evenly sprays high-pressure grey water or chilling water to the lower liquid level of the chilling chamber to achieve the purpose of breaking technique air bubbles. The modules work together to achieve the purposes of smooth water bath washing, bubble breaking, cooling and dust removal of thick coal gas in the chilling chamber; at the same time, the water and ash bringing problem of the thick coal gas in the chilling chamber is relieved, or even eliminated.
Description
Technical field
The utility model belongs to water coal slurry pressure gasification equipment technical field, is specifically related to a kind of simple and practical novel water-coal-slurry pressurized-gasification furnace shock chamber.
Background technology
At present, the shock chamber of Coal-water Slurry Pressurized Gasification Unit is mainly comprised of shock chamber's housing, chilling ring, downtake, upcast and pulp water pond.Thereby the caloic transmission that the high temperature that vapourizing furnace combustion chamber produces, high pressure raw coal gas by the chilled water with the ejection of shock chamber's chilling ring occur moment reaches the object of quick water-bath washing, humidification and cooling, the raw gas that temperature significantly reduces is being carried the bottom that cinder, the downtake of chilled water along shock chamber enter shock chamber secretly, in pulp water pond.In downtake outside, have a coaxial upcast, raw gas further washs in pulp water pond, after heat exchange, and the raw gas outlet that the overwhelming majority rises to ，Cong top, top, shock chamber from the annular space between downtake and upcast is discharged.Thick slag is deposited on slag basin bottom and discharges by lock hopper.
Make a general survey of the running condition of current coal water slurry pressurized gasifier shock chamber, the structure of chilling ring reaches its maturity, and normal service life is also substantially satisfactory.But the raw gas rising passway being formed by the annular space between downtake and upcast, but exist serious problem: because the annular space sectional area between downtake and upcast is limited, when raw gas is passed through, flow velocity is too high, the raw gas of high flow rate can carried chilled water secretly and enter upstream device, this will cause that shock chamber's band water is serious, liquid level constantly declines, and then causes rough coal band of gas ash, even because shock chamber's liquid level is too low, causes too high being forced to of raw gas temperature out to be stopped.Especially the in the situation that of vapourizing furnace heavy-duty service, raw gas is discharged in the mode of large-scale bubbling after entering at a high speed the pulp water pond of bottom, shock chamber, because raw gas flow velocity is high, blister volume is large, raw gas and pulp water contact area are little, cause and conduct heat and mass transfer effect seriously reduces, so can make raw gas after bubbling breaks occur band grey, with the situation of water.
On the other hand, because most of raw gas is to enter top, shock chamber by the annular space between upcast and downtake, and then export discharge by raw gas, only have very little a part of raw gas is to enter top, shock chamber through the space between upcast and shock chamber simultaneously.The existence of upcast makes the liquid level between shock chamber and upcast keep a steady state, be convenient to personnel's judgement and operation, but also reduced the scrubbing space of shock chamber and the free air space of raw gas, caused the comparatively serious entraining water problem of shock chamber's raw gas simultaneously.
At present, the liquid level that vapourizing furnace shock chamber rough coal band of gas water causes is difficult to control, chilled water flow increases severely, the rough coal band of gas is grey, Quench-wash water system is difficult to the common problem that the problems such as balance, vapourizing furnace heavy-duty service difficulty have become chilling process producer, and the normal operation of vapourizing furnace has been produced to larger impact.
For addressing the above problem, Chinese patent application 201110309940.5 provides a kind of rotary bubble breaking device, but this invention is not also suitable for vapourizing furnace shock chamber and contains a large amount of ashes, the practical situation of slag, because this member abrasion that rotatablely moves that can cause being immersed in pulp water pond is serious, lime-ash or fouling also can jam revolving part the parts such as bearing, the high velocity air of carrying in addition lime-ash secretly also can cause fatal impact to this rotary bubble breaking device to being immersed in the impact of each parts in pulp water pond, cannot guarantee to make the long-term stability operation of rotary bubble breaking device in shock chamber at all.Current reality is, though also the simplest upcast of the most frequently used, the most ripe, structure, because the impact endurance test shock of high velocity air is very large, even the accident that there will be upcast to come off, still more complex structure and have the rotary bubble breaking device of moving parts.
< < vapourizing furnace and the > > of the shock chamber patent of invention 201210125775.2 of Shenhua Group Co application, disclose a kind of shock chamber of novel texture.But this invention is not also suitable for shock chamber and includes the practical situation that the grey quantity of slag is high, gas shock power is large.Because the loose gas net in this invention is easy to be stopped up by macrobead slag or fouling in shock chamber, while causing raw gas to rise, aisle spare reduces, and not only can cause air-distributing tube to damage, and can cause too rough coal band of gas water, with grey situation.
From coal water slurry pressurized gasifier shock chamber running condition for many years, because cinder content in shock chamber is large, in water, calcium ions and magnesium ions content is high, at Quench indoor design moving parts or to reduce rough coal band of gas water, be with grey phenomenon with silk screen base part be inappropriate.In addition, raw gas flow velocity is high, the parts in surging force great ， shock chamber should be more simply, more few better, to extend the continuous operating time of shock chamber, reduce parking frequency, reduce maintenance workload.
Utility model content
The purpose of this utility model is to provide a kind of vapourizing furnace shock chamber, has realized the effect of water-bath washing to raw gas, cooling dedusting, reduces the band water even eliminated from shock chamber's raw gas simultaneously, is with grey problem.
For achieving the above object, the present invention has adopted following technical scheme.
A kind of vapourizing furnace shock chamber, this shock chamber comprises downtake, eddy flow water jet standpipe and eddy flow vapor pipe, described eddy flow vapor pipe is arranged at the lower end of downtake, the entrance of eddy flow vapor pipe is connected with downtake, the Way out of eddy flow vapor pipe is identical with the tangential direction of downtake, eddy flow water jet standpipe is arranged at the bottom of shock chamber, the entrance of eddy flow water jet standpipe extend out to outside shock chamber, the outlet of eddy flow water jet standpipe is arranged in shock chamber, and the Way out of eddy flow water jet standpipe is identical with the Way out of eddy flow vapor pipe.
The lower edge of described downtake is zig-zag, and the distance along circumferential weld under the Xia Yanyu shock chamber of downtake is 1000～2500mm.
Described shock chamber also comprises back up pad, the top of downtake and the welding of the chilling ring of shock chamber, and the bottom of downtake is connected with the housing of shock chamber by back up pad.
Described shock chamber also comprises the circumferential uniform broken bubble water jet standpipe of the housing of 1～2 Ceng Yan shock chamber, broken bubble water jet standpipe is arranged on the housing of shock chamber, the quantity of every layer of broken bubble water jet standpipe is 4～8, the side of broken bubble water jet standpipe towards bottom, shock chamber is evenly distributed with some row spout holes, and the diameter of spout hole is 5～20mm.
The mounting height of the broken bubble of basecoat water jet standpipe is higher than the liquid level 500～2500mm of shock chamber, and upper and lower two-layer broken bubble water jet standpipe is interspersed, and the vertical range between upper and lower two-layer broken bubble water jet standpipe is 100～2000mm.
One end of described broken bubble water jet standpipe is connected with flange with the housing of shock chamber, and the other end approaches the outside surface of downtake as far as possible but is not in actual contact, and blind dead with blind flange.
The diameter of described eddy flow vapor pipe is 50～200mm, eddy flow vapor pipe add up to 4～12, eddy flow vapor pipe is along the circumference uniform distribution of downtake, eddy flow vapor pipe is lower to 100～1500mm apart from downtake.
Described eddy flow vapor pipe arranges by one or more layers, the eddy flow vapor pipe following 100～1000mm of shock chamber's liquid level that all should submerge.
Described eddy flow water jet standpipe is symmetricly set on the housing of shock chamber, eddy flow water jet standpipe add up to 2～8.
The beneficial effects of the utility model are embodied in:
Shock chamber described in the utility model has cancelled upcast, and the rising passway of raw gas is significantly expanded, and has reduced the flow velocity of raw gas, so obviously reduced rough coal band of gas water, with grey quantity.
Meanwhile, the utility model is not at other moving parts of Quench indoor location, only adopted several fixing eddy flow vapor pipes and eddy flow water jet standpipe that the pulp water in shock chamber is rotated, from downtake, along the raw gas to surrounding ejection, can make again pulp water form the radial flow centered by downtake simultaneously, the pulp water of rotation and the pulp water of radial flow have stoped raw gas in pulp water, to form stable large-scale bubbling by the mode of mutual attrition crushing, raw gas can be discharged from pulp water pond, shock chamber with less bubbling, the bubble that simultaneously can bloat in order to constantly to puncture raw gas from the lower high pressure buck of broken bubble water jet standpipe ejection temperature, further reduced the series of problems that when raw gas passes pulp water pond, bubbling seriously brings, not only improved the caloic transmission effect between raw gas and pulp water, also improved water-bath washing, the effect of cooling dedusting.
In addition, the utility model can adopt fixing jet pipe (eddy flow vapor pipe and eddy flow water jet standpipe) from shock chamber, tangentially to spray respectively raw gas and lock hopper recirculated water, in pulp water pond, formed rotating vortex, make the cinder particle collision polymerization in pulp water, under the effect of centripetal force, fast deposition is at shock chamber's bottom centre position, and discharge by lock hopper, prevented that bulk cinder from causing stifled slag at bottom, shock chamber bridge formation.And simultaneously the pulp water of shock chamber's bottom margin is relatively clean, can enter Heisui River pipeline because of a large amount of cinders and cause the problems such as the blocked or valve abrasion of pipeline.
Accompanying drawing explanation
Fig. 1 is the vapourizing furnace shock chamber structural representation of the utility model embodiment;
Fig. 2 is the A-A of shock chamber shown in Fig. 1 schematic cross-section;
Fig. 3 is the B-B of shock chamber shown in Fig. 1 schematic cross-section;
Fig. 4 is the C-C of shock chamber shown in Fig. 1 schematic cross-section;
In figure: 1-chilling ring, 2-chilling ring water-supply pipe, 3-downtake, 4-broken bubble water jet standpipe, 5-eddy flow vapor pipe, 6-back up pad, 7-shock chamber housing, 8-eddy flow water jet standpipe, the outlet of 9-raw gas.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Referring to Fig. 1-Fig. 4, shock chamber described in the utility model comprises downtake 3 and the eddy flow water jet standpipe 8 and the eddy flow vapor pipe 5 that for the pulp water making in shock chamber, rotate, the lower edge of described downtake 3 is zig-zag, distance along circumferential weld under the Xia Yanyu shock chamber of downtake 3 is 1000～2500mm, described eddy flow vapor pipe 5 is arranged at the lower end of downtake 3, the entrance of eddy flow vapor pipe 5 is connected with downtake 3, the Way out of eddy flow vapor pipe 5 is identical with the tangential direction of downtake 3, eddy flow water jet standpipe 8 is arranged at the bottom of shock chamber, the entrance of eddy flow water jet standpipe 8 extend out to outside shock chamber, the outlet of eddy flow water jet standpipe 8 is arranged in shock chamber, the Way out of eddy flow water jet standpipe 8 is identical with the Way out of eddy flow vapor pipe 5, raw gas outlet 9 is arranged at the upper lateral part of shock chamber.
The diameter of described eddy flow vapor pipe 5 is 50～200mm, eddy flow vapor pipe 5 add up to 4～12, eddy flow vapor pipe 5 is along the circumference uniform distribution of downtake 3, eddy flow vapor pipe 5 is lower to 100～1500mm apart from downtake 3.Described eddy flow vapor pipe 5 arranges by one or more layers, the eddy flow vapor pipe 5 following 100～1000mm of shock chamber's liquid level that all should submerge.
Described eddy flow water jet standpipe 8 is symmetricly set on the housing of shock chamber, eddy flow water jet standpipe 8 add up to 2～8.
Described shock chamber also comprises back up pad 6, the top of downtake 3 and 1 welding of the chilling ring of shock chamber, and the bottom of downtake 3 is fixedly connected with the housing of shock chamber by back up pad 6.
Described shock chamber also comprises the circumferential uniform broken bubble water jet standpipe 4 of the housing of 1～2 Ceng Yan shock chamber, broken bubble water jet standpipe 4 is arranged on the housing of shock chamber of chilling ring water-supply pipe 2 bottoms, the quantity of every layer of broken bubble water jet standpipe 4 is 4～8, the side of broken bubble water jet standpipe 4 towards bottom, shock chamber is evenly distributed with some row spout holes, and the diameter of spout hole is 5～20mm.The mounting height of the broken bubble of basecoat water jet standpipe 4 is higher than the liquid level 500～2500mm of shock chamber, and upper and lower two-layer broken bubble water jet standpipe 4 is interspersed, and the vertical range between upper and lower two-layer broken bubble water jet standpipe 4 is 100～2000mm.One end of described broken bubble water jet standpipe 4 is fixedly connected with flange with the housing of shock chamber, and the other end approaches the outside surface of downtake 3 as far as possible but is not in actual contact, and the other end of broken bubble water jet standpipe is blind dead with blind flange.
The entrance of described eddy flow water jet standpipe is connected with lock hopper water circulating pump.
Embodiment
Referring to Fig. 1-Fig. 4, a kind of novel ，Gai shock chamber, coal water slurry pressurized gasifier shock chamber mainly comprises chilling ring 1, shock chamber's housing 7, raw gas outlet 9, downtake 3, eddy flow vapor pipe 5, broken bubble water jet standpipe 4 and the eddy flow water jet standpipe 8 etc. at top, shock chamber.
In the present embodiment, cancelled the upcast coaxial with downtake 3, due to the preset pieces of having cancelled between upcast and downtake 3 simultaneously, therefore need to increase by 4～8 uniform back up pads 6 in downtake 3 bottoms, back up pad 6 is fixedly connected with downtake 3 with shock chamber's housing 7, to increase the rigidity of downtake 3, prevent large flow raw gas by time vibrations downtake 3 is caused to damage.
The part that downtake is submerged into the following 100～1000mm of shock chamber's liquid level is evenly distributed with 4～12 eddy flow vapor pipes 5, can establish one or more layers, eddy flow vapor pipe 5 is connected by welding or flange with downtake 3, in it, along concordant with downtake internal surface, can not protrude from downtake internal surface.The outlet trend of eddy flow vapor pipe 5 should be parallel to the tangential direction of downtake 3, makes the raw gas of discharging according to clockwise or counterclockwise rotation, so that promote pulp water formation eddy flow from the raw gas of eddy flow vapor pipe 5 ejections.Eddy flow vapor pipe 5 diameters are preferably 50～200mm, also avoid excessive perforate to reduce the Rigidity and strength of downtake 3 when preventing stifled slag.
On the housing of the conical lower portion of shock chamber, be symmetrical arranged 2～8, the eddy flow water jet standpipe 8 of diameter 50～200mm, eddy flow water jet standpipe 8 is connected and fixed by welding or flange with shock chamber's housing 7, the trend of its water outlet should be parallel to the tangential direction of shock chamber's conical shell, and consistent with eddy flow vapor pipe 5 air-flow trends, be convenient to the formation of acting in conjunction promotion pulp water and move towards consistent eddy flow.Eddy flow water jet standpipe 8 can arrange separately, also can be formed by circulate mouth of a river transformation of lock hopper, and the water of its shock chamber that sprays into comes from lock hopper water circulating pump.
Broken bubble water jet standpipe 4 is arranged on shock chamber's housing 7 of chilling ring water-supply pipe 2 bottoms, and 4～8 of every number of plies amounts are uniform, and the number of plies is difficult for too much, 1～2 layer of operated by rotary motion.If the broken bubble of more than one deck water jet standpipe 4, upper and lower two-layer broken bubble water jet standpipe 4 should evenly be interspersed, and the vertical range between upper and lower two-layer broken bubble water jet standpipe 4 is 100～2,000mm.Broken 4 one of water jet standpipes of bubble are fixedly connected with shock chamber's housing 7 with flange or welding process, and other end approaches downtake 3 outside surfaces as far as possible but is not in actual contact, and blind dead with blind flange.Notice that broken bubble water jet standpipe 4 can not be too high apart from shock chamber's liquid level (more than shock chamber's liquid level 500～2,500mm), to prevent that the water column that the raw gas of high flow rate is ejected from dispelling.At shock chamber's housing 7 corresponding sites, open the water-in of equivalent amount and diameter, be installed as brokenly the short tube that bubble water jet standpipe 4 supplies water.Broken bubble water jet standpipe 4 is opened row or ordered series of numbers spout hole towards a side of bottom, shock chamber, and spout hole is uniformly distributed, and diameter is preferably 5～20mm.Notice that the water column that broken bubble water jet standpipe ejects can not directly wash away shock chamber's inwall or downtake outer wall before entering pulp water.
Give the water supply of broken bubble water jet standpipe preferably from the high pressure buck of high pressure ash water pump, also can use chilled water.But the former is because temperature is low, and water quality is good, broken bubble and washing effect will be higher than the latter.
The advantage of present embodiment is as follows:
(1) pulp water that the raw gas ejecting along indentation from downtake promotes shock chamber forms radial flow centered by downtake, the pulp water that the lock hopper recirculated water that the air-flow of simultaneously discharging due to eddy flow vapor pipe and eddy flow water jet standpipe spray promotes pulp water pond, shock chamber has jointly formed eddy flow, various flows to pulp water mutually clash into the larger bubbles fragmentation that raw gas bloats in pulp water diminished, increase contact area and the duration of contact of raw gas and pulp water, improved the water-bath washing to raw gas, the effect of cooling dedusting.
(2) on top, shock chamber, be provided with brokenly bubble water jet standpipe, high-velocity jet and under water column further strengthened the crushing effect of the larger bubbles to bloating in pulp water, make raw gas in pulp water, can not form large-scale bubbling or shift to an earlier date broken large-scale bubbling, contact area and the duration of contact of raw gas and pulp water have further been increased, further improve the effect to the water-bath washing of raw gas, cooling dedusting, also reduced the possibility of rough coal band of gas water band ash.
(3) cancel upcast structure, the rising passway of raw gas is significantly expanded, reduced the flow velocity of raw gas, further reduced rough coal band of gas water, with grey quantity.
(4) design of eddy flow vapor pipe and eddy flow water jet standpipe makes pulp water form eddy flow in pulp water pond, shock chamber, benefit in above-mentioned except having (1), the current of rotation also increased liquid level in shock chamber stability, effectively reduced because raw gas bubbling in shock chamber seethes and caused that liquid level is unstable, the even appearance of interlock shutdown situation of flase alarm.
(5) design of eddy flow vapor pipe and eddy flow water jet standpipe has formed pulp water eddy flow in pulp water pond, shock chamber.Due to the effect of centripetal force, the cinder particle collision polymerization in pulp water, can fast deposition at shock chamber's bottom centre position, and discharge by lock hopper, can effectively prevent from that bottom, shock chamber cinder from building bridge to cause the situation of stifled slag to occur.Simultaneously for above-mentioned reasons, the pulp water of slag pool edge is relatively clean, can effectively prevent that a large amount of cinders from entering Heisui River pipeline, and then greatly reduces the appearance of the problems such as the blocked or valve abrasion of Heisui River pipeline.
(6) simple in structure, stable.
The foregoing is only the utility model preferred embodiment, be not limited to the utility model.For a person skilled in the art, the utility model can have various changes and combination, all any modifications of making within spirit of the present utility model and principle, is equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1.Yi Zhong vapourizing furnace shock chamber, it is characterized in that: this shock chamber comprises downtake (3), eddy flow water jet standpipe (8) and eddy flow vapor pipe (5), described eddy flow vapor pipe (5) is arranged at the lower end of downtake (3), the entrance of eddy flow vapor pipe (5) is connected with downtake (3), the Way out of eddy flow vapor pipe (5) is identical with the tangential direction of downtake (3), eddy flow water jet standpipe (8) is arranged at the bottom of shock chamber, the entrance of eddy flow water jet standpipe (8) extend out to outside shock chamber, the outlet of eddy flow water jet standpipe (8) is arranged in shock chamber, the Way out of eddy flow water jet standpipe (8) is identical with the Way out of eddy flow vapor pipe (5).
2. a kind of vapourizing furnace shock chamber according to claim 1, is characterized in that: the lower edge of described downtake (3) is zig-zag, and the distance along circumferential weld under the Xia Yanyu shock chamber of downtake (3) is 1000～2500mm.
3. a kind of vapourizing furnace shock chamber according to claim 1, it is characterized in that: described shock chamber also comprises back up pad (6), chilling ring (1) welding of the top of downtake (3) and shock chamber, the bottom of downtake (3) is connected with the housing of shock chamber by back up pad (6).
4. a kind of vapourizing furnace shock chamber according to claim 1, it is characterized in that: described shock chamber also comprises the circumferential uniform broken bubble water jet standpipe (4) of the housing of 1～2 Ceng Yan shock chamber, broken bubble water jet standpipe (4) is arranged on the housing of shock chamber, the quantity of every layer of broken bubble water jet standpipe (4) is 4～8, broken bubble water jet standpipe (4) is evenly distributed with some row spout holes towards a side of bottom, shock chamber, and the diameter of spout hole is 5～20mm.
5. a kind of vapourizing furnace shock chamber according to claim 4, it is characterized in that: the mounting height of basecoat broken bubble water jet standpipe (4) is higher than the liquid level 500～2500mm of shock chamber, upper and lower two-layer broken bubble water jet standpipe (4) is interspersed, and the vertical range between upper and lower two-layer broken bubble water jet standpipe (4) is 100～2000mm.
6. a kind of vapourizing furnace shock chamber according to claim 4, it is characterized in that: one end of described broken bubble water jet standpipe (4) is connected with flange with the housing of shock chamber, the other end approaches the outside surface of downtake (3) as far as possible but is not in actual contact, and blind dead with blind flange.
7. a kind of vapourizing furnace shock chamber according to claim 1, it is characterized in that: the diameter of described eddy flow vapor pipe (5) is 50～200mm, eddy flow vapor pipe (5) add up to 4～12, eddy flow vapor pipe (5) is along the circumference uniform distribution of downtake (3), and eddy flow vapor pipe (5) is lower to 100～1500mm apart from downtake (3).
8. a kind of vapourizing furnace shock chamber according to claim 1, is characterized in that: described eddy flow vapor pipe (5) arranges by one or more layers, eddy flow vapor pipe (5) following 100～1000mm of shock chamber's liquid level that all should submerge.
9. a kind of vapourizing furnace shock chamber according to claim 1, is characterized in that: described eddy flow water jet standpipe (8) is symmetricly set on the housing of shock chamber, eddy flow water jet standpipe (8) add up to 2～8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320423739.4U CN203411515U (en) | 2013-07-17 | 2013-07-17 | Gasifier chilling chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320423739.4U CN203411515U (en) | 2013-07-17 | 2013-07-17 | Gasifier chilling chamber |
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| Publication Number | Publication Date |
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| CN203411515U true CN203411515U (en) | 2014-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320423739.4U Expired - Lifetime CN203411515U (en) | 2013-07-17 | 2013-07-17 | Gasifier chilling chamber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383438A (en) * | 2021-08-11 | 2022-04-22 | 西安东方能源工程有限公司 | Sectional spiral type condensation heat exchanger |
| CN114530975A (en) * | 2022-03-10 | 2022-05-24 | 江西昌龙电机有限公司 | Medical miniature brushless motor |
-
2013
- 2013-07-17 CN CN201320423739.4U patent/CN203411515U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383438A (en) * | 2021-08-11 | 2022-04-22 | 西安东方能源工程有限公司 | Sectional spiral type condensation heat exchanger |
| CN114530975A (en) * | 2022-03-10 | 2022-05-24 | 江西昌龙电机有限公司 | Medical miniature brushless motor |
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Granted publication date: 20140129 |