CN107875789A - High effective dehydration device for natural gas - Google Patents
High effective dehydration device for natural gas Download PDFInfo
- Publication number
- CN107875789A CN107875789A CN201711296955.6A CN201711296955A CN107875789A CN 107875789 A CN107875789 A CN 107875789A CN 201711296955 A CN201711296955 A CN 201711296955A CN 107875789 A CN107875789 A CN 107875789A
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- CN
- China
- Prior art keywords
- cold air
- natural gas
- dehydrating
- gas
- dehydration device
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/40—Combinations of devices covered by groups B01D45/00 and B01D47/00
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
Abstract
The invention discloses the high effective dehydration device for natural gas, including dehydrating tower, the bottom of dehydrating tower is provided with natural gas air inlet, the top of air inlet is provided with spherical arc plate in dehydrating tower, multiple passages are uniformly provided with spherical arc plate, multiple dehydrating tubes are connected with spherical arc plate, tapping sleeve is provided with dehydrating tube, the top of dehydrating tube is provided with cold air flow distribution plate, multiple cold air through holes are uniformly offered on cold air flow distribution plate, the top of cold air flow distribution plate is passed through mouth provided with cold air, and the top sidewall of dehydrating tower is provided with gas outlet, and gas outlet is connected with cyclone separator.The dehydration device of the present invention, by being shunted to natural gas and cold air, the area that increase cold air contacts with natural gas convection process, greatly improve the removal efficiency of water, so that the water in natural gas by primary dewatering technique remove it is more thorough, production efficiency is improved, the time of multiple dehydration cycle process is saved, has saved cost.
Description
Technical field
The present invention relates to a kind of dehydration device, and in particular to the high effective dehydration device for natural gas.
Background technology
Natural gas refers to a naturally occurring tangential gas in nature, including in atmospheric thermodynamics, hydrosphere and lithosphere it is various from
The gas (including casing-head gas, reservoir gas, gas of mud volcano, coal bed gas and biology generation gas etc.) that right process is formed.And people are long-term
Since general " natural gas " definition, be the narrow sense definition from energy point of view, refer to the hydrocarbon naturally contained in stratum
The mixture of class and non-hydrocarbon gases.In petroleum geology, casing-head gas and reservoir gas are often referred to.It is formed based on hydro carbons,
And contain non-hydrocarbon gas.Natural gas is contained in underground porous gap rock stratum, including casing-head gas, reservoir gas, coal bed gas, gas of mud volcano
Gas etc. is generated with biology, is also had on a small quantity for coal seam.It is high-grade fuel and industrial chemicals.Therefore, associated gas or gas well
In the natural gas produced, containing excessive moisture and liquid hydrocarbon, must be separated and be purified before defeated, burning is collected,
Its moisture is controlled, makes dry gas.Existing generally use cooled natural gas dehydration, i.e., by natural gas from the bottom of dehydrating tower
Portion is passed through, and cold air is then passed through above dehydrating tower, and then with natural gas counter current contact occurs for cold air so that wherein
Water condensation after remove, but existing dehydrating tower dewatering efficiency is low, it usually needs carrying out multiple dehydration procedure can be by it
In moisture thoroughly remove, efficiency it is low, it is necessary to equipment it is various, cost is high.
The content of the invention
The technical problems to be solved by the invention are the dehydrations of existing generally use cooled natural gas, i.e., by natural gas from dehydration
The bottom of tower is passed through, and cold air is then passed through above dehydrating tower, then cold air and natural gas occur counter current contact so as to
Removed after making water condensation therein, but existing dehydrating tower dewatering efficiency is low, it usually needs carry out multiple dehydration procedure ability
It is enough thoroughly to remove moisture therein, efficiency it is low, it is necessary to equipment it is various, cost height is, and it is an object of the present invention to provide be used for natural gas
High effective dehydration device, first by being shunted to natural gas and cold air, while increase cold air with natural gas to flowing through
The area contacted in journey, greatly improve the removal efficiency of water so that the water in natural gas by primary dewatering technique is gone
Except more thoroughly, improve production efficiency, save the time of multiple dehydration cycle process so that water disposably can just obtain
Thoroughly remove, be carried out continuously dehydration without multiple devices, saved cost.
The present invention is achieved through the following technical solutions：
For the high effective dehydration device of natural gas, including dehydrating tower, the bottom of dehydrating tower is provided with natural gas air inlet, dehydration
The top of air inlet is provided with spherical arc plate in tower, and the edge of spherical arc plate is bonded completely with dehydration inner wall of tower and opening up, ball
Multiple passages are uniformly provided with the arc plate of face, multiple dehydrating tubes are connected with spherical arc plate, passage is connected with the lower end of dehydrating tube
It is logical, tapping sleeve is provided with dehydrating tube, tapping sleeve is arranged and formed successively from the inside to the outside by the different sleeve pipe of multiple sizes, shunting
Sleeve pipe can rotate around own axes, and sleeve pipe is netted hollow-core construction, and water absorbing agent, dehydrating tube are filled with sleeve pipe
Top be provided with and spherical arc plate shape identical cold air flow distribution plate, cold air flow distribution plate it is opening down, cold air shunting
Multiple cold air through holes are uniformly offered on plate, cold air through hole is connected with the upper end of dehydrating tube, is set above cold air flow distribution plate
There is cold air to be passed through mouth, the top sidewall of dehydrating tower is provided with gas outlet, and gas outlet is connected with cyclone separator.
The dehydration device of the present invention, first by being shunted to natural gas and cold air, while increases cold air and day
The area contacted in right gas convection process, greatly improve the removal efficiency of water so that by the natural of primary dewatering technique
Water removal in gas is more thorough, improves production efficiency, saves the time of multiple dehydration cycle process so that water is disposable
It just can thoroughly be removed, be carried out continuously dehydration without multiple devices, saved cost.The natural gas that needs are dehydrated
It is passed through at the bottom air inlet of dehydrating tower, after entering in dehydrating tower, under the guiding function of spherical arc plate, natural gas is divided
Stream is entered in multiple dehydration tubes after being each passed through multiple passages；Cold air is passed through mouth from cold air and enters cold air shunting
The top of plate, had respectively entered after being then tapped off in dehydrating tube；The natural gas moved upwards and the cold air moved downward exist
Occur counter current contact in dehydrating tube, be wherein provided with tapping sleeve in dehydrating tube, tapping sleeve by the different sleeve pipe of multiple sizes from
Interior to form to being arranged successively outside, that is, the natural gas entered in dehydrating tube can be each passed through tapping sleeve with cold air, be divided
Into multiple different regions, then the cold air in each zonule contacts with natural gas, so greatly adds cold air
Contact area between natural gas, the removal efficiency of natural gas reclaimed water is improved, make the disposable right of natural gas and cold air
Sufficient contact has been obtained during stream, by the structure of the present invention, by shunting natural gas and cold air respectively, has been passed through simultaneously
The contact area of cold air and natural gas in tapping sleeve increase isodose, improve the efficiency and quality of dehydration, dehydration procedure
Required time is short, without multiple dehydration cycle, while has saved equipment cost；Tapping sleeve can do rotation fortune around own axes
It is dynamic, and sleeve pipe is netted hollow-core construction, is filled with water absorbing agent in sleeve pipe, water absorbing agent uses anhydrous cupric sulfate particle, diversion sleeve
Pipe can be such that cold air therein is followed with natural gas and rotate in rotary movement, under the influence of centrifugal force, day
Just " got rid of " after water condensation in right gas on the inwall of sleeve pipe then by water absorbent, further improve dehydrating effect；Through
Natural gas after dehydrating tube dehydration makes the moisture in natural gas thoroughly remove again by the further processing of cyclone separator.
The top that cold air is passed through mouth is provided with horizontally disposed water suction filter membranous layer, further improves dehydrating effect.
The top that cold air is passed through mouth is provided with heating chamber, and the inwall of heating chamber is provided with heating tube, opened at the top of heating chamber
Provided with opening, opening is provided with valve, and opening is connected with gas outlet, and natural gas continues to rise after dehydrating tube dehydration
Enter and heating, drying is carried out in heating chamber.
The open top of heating chamber is opened in the side away from gas outlet, and the top of heating chamber is provided with horizontally disposed spiral shell
Gas transmission bar is revolved, the end of spiral gas transmission bar is arranged on gas outlet, and the top of spiral gas transmission bar is provided with heating plate, and natural gas passes through spiral shell
Rotation gas transmission bar be transported in gas outlet, during to the further heating, drying of natural gas.
Multiple semi-cylindrical raised lines, the axis and casing axis of raised line are circumferentially sequentially provided with the inwall of sleeve pipe
It is parallel, increase the inner wall area of sleeve pipe.
The present invention compared with prior art, has the following advantages and advantages：
1st, the present invention is used for the high effective dehydration device of natural gas, first by being shunted to natural gas and cold air, together
The area that Shi Zeng great cold airs contact with natural gas convection process, greatly improve the removal efficiency of water so that by one
Water removal in the natural gas of secondary dewatering process is more thorough, improves production efficiency, saves multiple dehydration cycle process
Time so that water succession just can be removed thoroughly, be carried out continuously dehydration without multiple devices, saved cost；
2nd, the present invention is used for the high effective dehydration device of natural gas, and the top that cold air is passed through mouth is provided with horizontally disposed water suction
Filter membranous layer, dehydrating effect is further improved, the top that cold air is passed through mouth is provided with heating chamber, and the inwall of heating chamber is provided with heating
Manage, opening is offered at the top of heating chamber, opening is provided with valve, and opening is connected with gas outlet, and natural gas passes through dehydrating tube
After dehydration, continue to rise into that heating, drying is carried out in heating chamber；
3rd, the present invention is used for the high effective dehydration device of natural gas, and the open top of heating chamber is opened in one away from gas outlet
Side, the top of heating chamber are provided with horizontally disposed spiral gas transmission bar, and the end of spiral gas transmission bar is arranged on gas outlet, spiral transferring
The top of gas bar is provided with heating plate, and natural gas is transported in gas outlet by spiral gas transmission bar, during it is further to natural gas
Heating, drying, be circumferentially sequentially provided with multiple semi-cylindrical raised lines, the axis and sleeve pipe of raised line on the inwall of sleeve pipe
Diameter parallel, increase the inner wall area of sleeve pipe.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the structural representation of tapping sleeve of the present invention.
Mark and corresponding parts title in accompanying drawing：
1- dehydrating towers, 2- air inlets, 3- spherical arc plates, 4- passages, 5- dehydrating tubes, 6- tapping sleeves, 7- cold airs point
Flowing plate, 8- cold air through holes, 9- gas outlets, 10- water suction filter membranous layers, 11- heating tubes, 12- cyclone separators, 13- spiral gas transmission bars,
14- heating plates.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
As depicted in figs. 1 and 2, the present invention is used for the high effective dehydration device of natural gas, including dehydrating tower 1, the bottom of dehydrating tower 1
Portion is provided with natural gas air inlet 2, and the top of air inlet 2 is provided with spherical arc plate 3, the edge of spherical arc plate 3 and dehydration in dehydrating tower 1
The inwall of tower 1 completely fitting and it is opening up, multiple passages 4 are uniformly provided with spherical arc plate 3, are connected with spherical arc plate 3 multiple
Dehydrating tube 5, passage 4 are connected with the lower end of dehydrating tube 5, are provided with tapping sleeve 6 in dehydrating tube 5, tapping sleeve 6 is by multiple chis
Very little different sleeve pipe is arranged successively from the inside to the outside to be formed, and tapping sleeve 6 can rotate around own axes, and sleeve pipe is
Netted hollow-core construction, sleeve pipe is interior to be filled with water absorbing agent, and the top of dehydrating tube 5 is provided with and the shape identical cold air of spherical arc plate 3
Flow distribution plate 7, cold air flow distribution plate 7 it is opening down, multiple cold air through holes 8 are uniformly offered on cold air flow distribution plate 7, cold air leads to
Hole 8 is connected with the upper end of dehydrating tube 5, and the top of cold air flow distribution plate 7 is passed through mouth, the top side of dehydrating tower 1 provided with cold air
Wall is provided with gas outlet 9, and gas outlet 9 is connected with cyclone separator 12.
The dehydration device of the present invention, first by being shunted to natural gas and cold air, while increases cold air and day
The area contacted in right gas convection process, greatly improve the removal efficiency of water so that by the natural of primary dewatering technique
Water removal in gas is more thorough, improves production efficiency, saves the time of multiple dehydration cycle process so that water is disposable
It just can thoroughly be removed, be carried out continuously dehydration without multiple devices, saved cost.The natural gas that needs are dehydrated
It is passed through at the bottom air inlet of dehydrating tower, after entering in dehydrating tower, under the guiding function of spherical arc plate, natural gas is divided
Stream is entered in multiple dehydration tubes after being each passed through multiple passages；Cold air is passed through mouth from cold air and enters cold air shunting
The top of plate, had respectively entered after being then tapped off in dehydrating tube；The natural gas moved upwards and the cold air moved downward exist
Occur counter current contact in dehydrating tube, be wherein provided with tapping sleeve in dehydrating tube, tapping sleeve by the different sleeve pipe of multiple sizes from
Interior to form to being arranged successively outside, that is, the natural gas entered in dehydrating tube can be each passed through tapping sleeve with cold air, be divided
Into multiple different regions, then the cold air in each zonule contacts with natural gas, so greatly adds cold air
Contact area between natural gas, the removal efficiency of natural gas reclaimed water is improved, make the disposable right of natural gas and cold air
Sufficient contact has been obtained during stream, by the structure of the present invention, by shunting natural gas and cold air respectively, has been passed through simultaneously
The contact area of cold air and natural gas in tapping sleeve increase isodose, improve the efficiency and quality of dehydration, dehydration procedure
Required time is short, without multiple dehydration cycle, while has saved equipment cost；Tapping sleeve can do rotation fortune around own axes
It is dynamic, and sleeve pipe is netted hollow-core construction, is filled with water absorbing agent in sleeve pipe, water absorbing agent uses anhydrous cupric sulfate particle, diversion sleeve
Pipe can be such that cold air therein is followed with natural gas and rotate in rotary movement, under the influence of centrifugal force, day
Just " got rid of " after water condensation in right gas on the inwall of sleeve pipe then by water absorbent, further improve dehydrating effect；Through
Natural gas after dehydrating tube dehydration makes the moisture in natural gas thoroughly remove again by the further processing of cyclone separator.
Preferably, further improve dehydration provided with horizontally disposed water suction filter membranous layer 10 and imitate in the top that cold air is passed through mouth
Fruit.
Preferably, cold air is passed through the top of mouth and is provided with heating chamber, and the inwall of heating chamber is provided with heating tube 11, heating chamber
Top offer opening, opening is provided with valve, and opening is connected with gas outlet, after natural gas is dehydrated by dehydrating tube,
Continue to rise into and heating, drying is carried out in heating chamber.
Preferably, the open top of heating chamber is opened in the side away from gas outlet, and the top of heating chamber is provided with level
The spiral gas transmission bar 13 of setting, the end of spiral gas transmission bar are arranged on gas outlet, and the top of spiral gas transmission bar is provided with heating plate 14,
Natural gas is transported in gas outlet by spiral gas transmission bar, during to the further heating, drying of natural gas.
Preferably, be circumferentially sequentially provided with multiple semi-cylindrical raised lines on the inwall of sleeve pipe, the axis of raised line with
Casing axis are parallel, increase the inner wall area of sleeve pipe.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (6)
1. the high effective dehydration device for natural gas, it is characterised in that including dehydrating tower (1), the bottom of dehydrating tower (1) is provided with day
Right gas air inlet (2), the top of dehydrating tower (1) interior air inlet (2) are provided with spherical arc plate (3), and the edge of spherical arc plate (3) is with taking off
Water tower (1) inwall is bonded and opening up completely, and multiple passages (4), spherical arc plate (3) are uniformly provided with spherical arc plate (3)
On be connected with multiple dehydrating tubes (5), passage (4) is connected with the lower end of dehydrating tube (5), is provided with tapping sleeve in dehydrating tube (5)
(6), tapping sleeve (6) is arranged and formed successively from the inside to the outside by the different sleeve pipe of multiple sizes, and tapping sleeve (6) can be around itself
Axis rotates, and sleeve pipe is netted hollow-core construction, is filled with water absorbing agent in sleeve pipe, the top of dehydrating tube (5) is provided with
With spherical arc plate (3) shape identical cold air flow distribution plate (7), opening down, the cold air flow distribution plate of cold air flow distribution plate (7)
(7) multiple cold air through holes (8) are uniformly offered on, cold air through hole (8) is connected with the upper end of dehydrating tube (5), cold air shunting
The top of plate (7) is passed through mouth provided with cold air, and the top sidewall of dehydrating tower (1) is provided with gas outlet (9), gas outlet (9) and rotation
Stream separator (12) is connected.
2. the high effective dehydration device according to claim 1 for natural gas, it is characterised in that cold air is passed through the upper of mouth
Side is provided with horizontally disposed water suction filter membranous layer (10).
3. the high effective dehydration device according to claim 1 for natural gas, it is characterised in that cold air is passed through the upper of mouth
Side is provided with heating chamber, and the inwall of heating chamber is provided with heating tube (11), offers opening at the top of heating chamber, opening is provided with valve
Door, opening are connected with gas outlet (9).
4. the high effective dehydration device according to claim 3 for natural gas, it is characterised in that the open top of heating chamber
The side away from gas outlet (9) is opened in, the top of heating chamber is provided with horizontally disposed spiral gas transmission bar (13), spiral gas transmission
The end of bar (13) is arranged on gas outlet (9).
5. the high effective dehydration device according to claim 1 for natural gas, it is characterised in that on the inwall of sleeve pipe along
Circumferencial direction is sequentially provided with multiple semi-cylindrical raised lines, and the axis of raised line is parallel with casing axis.
6. the high effective dehydration device according to claim 4 for natural gas, it is characterised in that spiral gas transmission bar (13)
Top is provided with heating plate (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711296955.6A CN107875789B (en) | 2017-12-08 | 2017-12-08 | Efficient dehydration device for natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711296955.6A CN107875789B (en) | 2017-12-08 | 2017-12-08 | Efficient dehydration device for natural gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107875789A true CN107875789A (en) | 2018-04-06 |
| CN107875789B CN107875789B (en) | 2023-09-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711296955.6A Active CN107875789B (en) | 2017-12-08 | 2017-12-08 | Efficient dehydration device for natural gas |
Country Status (1)
| Country | Link |
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| CN (1) | CN107875789B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110755932A (en) * | 2019-11-02 | 2020-02-07 | 周孝威 | Prevent dehydration tower of jam |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2317930Y (en) * | 1997-10-11 | 1999-05-12 | 营口有机化工厂 | Contact cold-wind dewatering tower |
| US20150302138A1 (en) * | 2014-04-18 | 2015-10-22 | Chevron U.S.A. Inc. | Natural gas dehydration vessel having reduced regeneration mode cycle time and method of use and design thereof |
| CN105457330A (en) * | 2015-12-09 | 2016-04-06 | 无锡西源电力装备厂 | Efficient steam-water separation device for power station auxiliary equipment |
| CN205387561U (en) * | 2016-03-15 | 2016-07-20 | 任茂平 | Novel natural gas dehydration device |
| CN105771516A (en) * | 2016-04-29 | 2016-07-20 | 翁跃勤 | Centrifugal gas way type gas purifier |
| CN205495156U (en) * | 2016-03-15 | 2016-08-24 | 河南弘康环保科技有限公司 | Circulating fluidized bed desulfurization vapour and liquid separator |
| CN106701230A (en) * | 2015-07-24 | 2017-05-24 | 天津安耐吉燃气技术有限公司 | CNG cooling separator |
| CN107384493A (en) * | 2017-08-21 | 2017-11-24 | 江苏卓达信息科技有限公司 | The dehydration device of liquefied natural gas (LNG) production |
| CN207537411U (en) * | 2017-12-08 | 2018-06-26 | 四川科比科油气工程有限公司 | The natual gas dehydrate unit of dehydration efficiency can be improved |
-
2017
- 2017-12-08 CN CN201711296955.6A patent/CN107875789B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2317930Y (en) * | 1997-10-11 | 1999-05-12 | 营口有机化工厂 | Contact cold-wind dewatering tower |
| US20150302138A1 (en) * | 2014-04-18 | 2015-10-22 | Chevron U.S.A. Inc. | Natural gas dehydration vessel having reduced regeneration mode cycle time and method of use and design thereof |
| CN106701230A (en) * | 2015-07-24 | 2017-05-24 | 天津安耐吉燃气技术有限公司 | CNG cooling separator |
| CN105457330A (en) * | 2015-12-09 | 2016-04-06 | 无锡西源电力装备厂 | Efficient steam-water separation device for power station auxiliary equipment |
| CN205387561U (en) * | 2016-03-15 | 2016-07-20 | 任茂平 | Novel natural gas dehydration device |
| CN205495156U (en) * | 2016-03-15 | 2016-08-24 | 河南弘康环保科技有限公司 | Circulating fluidized bed desulfurization vapour and liquid separator |
| CN105771516A (en) * | 2016-04-29 | 2016-07-20 | 翁跃勤 | Centrifugal gas way type gas purifier |
| CN107384493A (en) * | 2017-08-21 | 2017-11-24 | 江苏卓达信息科技有限公司 | The dehydration device of liquefied natural gas (LNG) production |
| CN207537411U (en) * | 2017-12-08 | 2018-06-26 | 四川科比科油气工程有限公司 | The natual gas dehydrate unit of dehydration efficiency can be improved |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110755932A (en) * | 2019-11-02 | 2020-02-07 | 周孝威 | Prevent dehydration tower of jam |
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| Publication number | Publication date |
|---|---|
| CN107875789B (en) | 2023-09-01 |
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