CN109253632A - A kind of environment-friendly type cooling humidifying roller - Google Patents
A kind of environment-friendly type cooling humidifying roller Download PDFInfo
- Publication number
- CN109253632A CN109253632A CN201811025590.8A CN201811025590A CN109253632A CN 109253632 A CN109253632 A CN 109253632A CN 201811025590 A CN201811025590 A CN 201811025590A CN 109253632 A CN109253632 A CN 109253632A
- Authority
- CN
- China
- Prior art keywords
- roller
- tail end
- environment
- friendly type
- type cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/06—Mechanically-operated devices, e.g. clinker pushers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The present invention relates to a kind of environment-friendly type cooling humidifying rollers, including roller, spray equipment, the spray equipment includes water inlet pipe and the shower tray at roller tail end, and the outside of the roller tail end is provided with heat exchange columns for recycling drums inside water vapour waste heat and for handling the sink of heat exchange columns tail gas.The waste heat that environment-friendly type cooling humidifying roller of the present invention can contain the water vapour of dust to drums inside carries out secondary recovery utilization, and waste heat recovery efficiency is high, is discharged to the tail gas in air without containing dust, avoids pollution air, energy conservation and environmental protection.
Description
Technical field
The present invention relates to a kind of environment-friendly type cooling humidifying rollers, belong to cold slag technical field.
Background technique
It is very high (1000 DEG C or so) that ground slag temperature is discharged after boiler of power plant burning, is unfavorable for transporting, and cause heat
Waste, currently, warm sludge is cooling, first is that indigenous method, pours into cooling pond for warm sludge, pulled out after cooling with grab bucket, low efficiency, heat
It cannot recycle, belong to backward technique and do not have to substantially.It is in installing more in roller second is that applying more barrel slag cooler at present
The slag-transporting pipe of built-in flight, warm sludge enter each slag-transporting pipe by slag input funnel, adapter tube, bend pipe, cone cylinder, with the rotation of roller, heat
Rolling is dynamic forward under flight guide functions in slag-transporting pipe for slag, and cooling water is entered in roller by cooling water pipe, then through core
Pipe discharge, such heat exchange keep warm sludge cooling.
Existing lag cooler is during carrying out cooling humidification, since a large amount of water vapour can be generated, the part water vapour
Usually direct outlet, this not only causes the waste of heat, and due to containing a large amount of dust in water vapour, this will cause vehicle
Between environment become severe.
Summary of the invention
The present invention is in view of the deficienciess of the prior art, provide a kind of environment-friendly type cooling humidifying roller, particular technique side
Case is as follows:
A kind of environment-friendly type cooling humidifying roller, including roller, spray equipment, the spray equipment include water inlet pipe and are located at
Shower tray at roller tail end, the outside of the roller tail end are provided with the heat exchange columns for recycling drums inside water vapour waste heat
With the sink for being used to handle heat exchange columns tail gas.
As an improvement of the above technical solution, the heat exchange columns include cylindric tower body, the bottom-open of the tower body,
The side wall of the tower body is provided with for the movable through-hole of roller tail end, and the roller tail end passes through through-hole and the setting of roller tail end exists
The inside of tower body, the bottom of the tower body are provided with deslagging chamber, and the deslagging chamber is located at the lower section of through-hole, under the deslagging chamber
Portion is provided with scum pipe, and the upper end of the scum pipe is connected to deslagging chamber；The inside of tower body, the tower is arranged in the shower tray
The inside of body is additionally provided with the first heat exchanger tube of snakelike distribution, and vent is provided at the top of the tower body, the vent
Top is installed with centrifugal blower, and the input terminal of the centrifugal blower is connected to vent, the output end and water of the centrifugal blower
Connecting leg is provided between slot, the tail end of the connecting leg is connected to the output end of centrifugal blower, and the head end of the connecting leg is arranged in water
The inside of slot.
As an improvement of the above technical solution, the outer cover of the roller tail end be equipped with casing, the inner wall of described sleeve pipe with
Gap is provided between the lateral wall of roller tail end, the inner wall of described sleeve pipe is fixedly provided with multiple strip metal films, the gold
Belong to film to be arranged between internal surface of sleeve pipe and the lateral wall of roller tail end along the inner wall of casing.
As an improvement of the above technical solution, the length of the metal film is greater than or equal to the inner wall and roller tail end of casing
Lateral wall between spacing.
As an improvement of the above technical solution, the second heat exchanger tube for being internally provided with snakelike distribution of the sink.
As an improvement of the above technical solution, the bottom of the sink is provided with tapping valve, the input terminal of the tapping valve
It is connected to the inner cavity of sink.
As an improvement of the above technical solution, the shower tray includes cylindric water tank, the tail end and water of the water inlet pipe
The inner cavity of case is connected to, and more water pipes, the tail end closing of the water pipe, the head of the water pipe are symmetrically distributed on the outside of the water tank
End is connected to the inner cavity of water tank, and the side wall of the water pipe is provided with multiple hole for water sprayings for facing drum cavity.
As an improvement of the above technical solution, the deslagging chamber is reverse frustoconic structure.
As an improvement of the above technical solution, the top of the scum pipe is additionally provided with residual cake valve.
The waste heat that environment-friendly type cooling humidifying roller of the present invention can contain the water vapour of dust to drums inside carries out
Secondary recovery utilizes, and waste heat recovery efficiency is high, is discharged to the tail gas in air without containing dust, avoids pollution air, energy conservation and environmental protection.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of environment-friendly type cooling humidifying roller of the present invention；
Fig. 2 is the schematic internal view of heat exchange columns of the present invention and casing；
Fig. 3 is the schematic internal view of sink of the present invention；
Fig. 4 is the structural schematic diagram of shower tray of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figures 1 to 3, the environment-friendly type cooling humidifying roller, including roller 10, spray equipment, the spray equipment
Shower tray 62 including water inlet pipe 61 and at 10 tail end of roller, the outside of 10 tail end of roller are provided with for recycling rolling
Cylinder 10 internal water steam waste heats heat exchange columns 20 and for handling the sink 50 of 20 tail gas of heat exchange columns.The heat exchange columns 20 include circle
The tower body 21 of tubular, the bottom-open of the tower body 21, the side wall of the tower body 21 are provided with movable logical for 10 tail end of roller
Hole, 10 tail end of roller is across through-hole and the inside of tower body 21, the bottom setting of the tower body 21 is arranged in 10 tail end of roller
There is deslagging chamber 22, the deslagging chamber 22 is located at the lower section of through-hole, and the lower part of the deslagging chamber 22 is provided with scum pipe 23, the row
The upper end of slag pipe 23 is connected to deslagging chamber 22；The inside of tower body 21 is arranged in the shower tray 62, and the inside of the tower body 21 is also
It is provided with the first heat exchanger tube 25 of snakelike distribution, the top of the tower body 21 is provided with vent 211, the vent 211
Top is installed with centrifugal blower 26, and the input terminal of the centrifugal blower 26 is connected to vent 211, the centrifugal blower 26 it is defeated
Connecting leg 40 is provided between outlet and sink 50, the tail end of the connecting leg 40 is connected to the output end of centrifugal blower 26, the company
The inside of sink 50 is arranged in the head end of pipe 40.
High temperature furnace slag is transported to the inside of roller 10 from 10 head end of roller, in the helical blade of 10 inner wall of roller
The tail end of roller 10 is constantly rolled and is pushed under conveying, and water inlet pipe 61 is connected with tap water, from shower tray 62 not
Disconnected ejection shower water cool down to the clinker inside roller 10, cool down, is humidified, and a part is evaporated shower water at high temperature
At water vapour, contain a large amount of dust in the water vapour.Start centrifugal blower 26, under the action of centrifugal blower 26, containing big
The water vapour of amount dust is pumped to the inside of tower body 21；The import of first heat exchanger tube 25 is connected with tap water, contains a large amount of dust
Water vapour and the first heat exchanger tube 25 and the first heat exchanger tube 25 inside tap water carry out heat exchange, go out from the first heat exchanger tube 25
Usually at 55~68 DEG C, tap water at this temperature is transported in boiler to be heated to form steaming the tap water temperature being discharged at mouthful
Vapour can save energy.The tail gas containing dust inside tower body 21 is defeated by connecting leg 40 under the action of centrifugal blower 26
It is sent to the inside of sink 50, the inside of sink 50 is placed with clear water, and the head end of clear water connecting leg 40 is to flooding, in this way, from connecting leg 40
Dust in the tail gas of head end discharge can be arranged normally into air by the washing of clear water, will not pollute air.
Since continuously to 50 internal discharge tail gas of sink, this enables the temperature of 50 inside sewage of sink to reach
60~76 DEG C；Further, the second heat exchanger tube 51 for being internally provided with snakelike distribution of the sink 50.It can be by tap water from
The inner cavity of the second heat exchanger tube 51 is input in the import of two heat exchanger tubes 51, the sewage of 50 60~76 DEG C of inside of sink can be with second
Tap water inside heat exchanger tube 51 and the second heat exchanger tube 51 carries out heat exchange, so that 51 exit of the second heat exchanger tube is discharged
Tap water temperature reach 36~47 DEG C, tap water at this temperature, which is transported in boiler, can save energy.
Further, it is cleaned for convenience of by the sewage discharge inside sink 50, the bottom of the sink 50 is provided with
The input terminal of tapping valve 53, the tapping valve 53 is connected to the inner cavity of sink 50.
Further, the outer cover of 10 tail end of roller is equipped with casing 30, the inner wall and 10 tail of roller of described sleeve pipe 30
Gap is provided between the lateral wall at end, the inner wall of described sleeve pipe 30 is fixedly provided with multiple strip metal films 31, the metal
Film 31 is arranged between the lateral wall of 10 tail end of 30 inner wall of casing and roller along the inner wall of casing 30.In the blocking of metal film 31
Under, along with centrifugal blower 26 effect so that tower body 21 inside generate negative pressure, this make the water vapour inside tower body 21 with
And dust is not easy to overflow from the gap location between the lateral wall of 10 tail end of inner wall and roller of casing 30, the metal film 31 is wear-resisting
Damage, long service life.
Further, the length of the metal film 31 is greater than or equal to the inner wall of casing 30 and the lateral wall of 10 tail end of roller
Between spacing.This enables the loose free end of metal film 31 and the lateral wall of 10 tail end of roller to be in contact, thus
It is capable of forming effective blocking.
Clinker through supercooling, humidification is discharged to inside tower body 21 from 10 tail end of roller, the row of falling under gravity into
Grit chamber 22 finally concentrates discharge from scum pipe 23.
Further, for blocking of the shower tray 62 to clinker is effectively reduced, clinker is enabled effectively to drop into deslagging
Room 22；As shown in figure 4, the shower tray 62 includes cylindric water tank 621, the tail end of the water inlet pipe 61 is interior with water tank 621
Chamber connection, the outside of the water tank 621 are symmetrically distributed with more water pipes 622, the tail end closing of the water pipe 622, the water pipe
622 head end is connected to the inner cavity of water tank 621, and the side wall of the water pipe 622 is provided with multiple sprays for facing 10 inner cavity of roller
Water hole 6221.It is then uniform from hole for water spraying 6221 that tap water in the water inlet pipe 61 passes sequentially through water tank 621, water pipe 622
Ground is sprayed onto the inside of roller 10, carries out cooling to the clinker inside roller 10, is humidified.Since there are non-between adjacent water pipe 622
Often big gap, this advantageously reduces blocking of the shower tray 62 to clinker, enable the clinker of 10 tail end of roller smoothly arrange to
Deslagging chamber 22.
Further, the deslagging chamber 22 is reverse frustoconic structure, this is conducive to clinker and arranges to scum pipe 23.
Further, the top of the scum pipe 23 is additionally provided with residual cake valve 231.When without deslagging operation, it can close
Residual cake valve 231 is closed, this can guarantee that clinker is sufficiently cooled, while can also effectively avoid the water vapour inside tower body 21 at this time
It is overflowed from the lower end of scum pipe 23.
In the above-described embodiments, the environment-friendly type cooling humidifying roller contains 10 inside of roller using heat exchange columns 20
There is the waste heat of the water vapour of dust to be recycled, while can also avoid by the water vapour pollution containing dust；Utilize water
The waste heat that slot 50 is not only able to the tail gas that exchange thermal tower 20 is discharged is recycled, and improves waste heat recovery efficiency, while can also
It is enough to be cleaned up the dust in 20 tail gas of heat exchange columns, avoid pollution air.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (9)
1. a kind of environment-friendly type cooling humidifying roller, including roller (10), spray equipment, the spray equipment includes water inlet pipe (61)
Be located at roller (10) tail end at shower tray (62), it is characterised in that: the outside of roller (10) tail end be provided with for
Recycle the heat exchange columns (20) of roller (10) internal water steam waste heat and for handling the sink (50) of heat exchange columns (20) tail gas.
2. a kind of environment-friendly type cooling humidifying roller according to claim 1, it is characterised in that: the heat exchange columns (20) include
Cylindric tower body (21), the bottom-open of the tower body (21), the side wall of the tower body (21) are provided with for roller (10) tail
Hold movable through-hole, roller (10) tail end passes through through-hole and the setting of roller (10) tail end is in the inside of tower body (21), described
The bottom of tower body (21) is provided with deslagging chamber (22), and the deslagging chamber (22) is located at the lower section of through-hole, the deslagging chamber (22)
Lower part is provided with scum pipe (23), and the upper end of the scum pipe (23) is connected to deslagging chamber (22)；Shower tray (62) setting
In the inside of tower body (21), the inside of the tower body (21) is additionally provided with the first heat exchanger tube (25) of snakelike distribution, the tower body
(21) it is provided at the top of vent (211), is installed with centrifugal blower (26), the centrifugation above the vent (211)
The input terminal of blower (26) is connected to vent (211), is arranged between the output end and sink (50) of the centrifugal blower (26)
Have connecting leg (40), the tail end of the connecting leg (40) is connected to the output end of centrifugal blower (26), and the head end of the connecting leg (40) is set
Set the inside in sink (50).
3. a kind of environment-friendly type cooling humidifying roller according to claim 1, it is characterised in that: roller (10) tail end
Outer cover is equipped with casing (30), is provided with gap between the inner wall of described sleeve pipe (30) and the lateral wall of roller (10) tail end, institute
The inner wall for stating casing (30) is fixedly provided with multiple strip metal films (31), the metal film (31) along casing (30) inner wall
It is arranged between casing (30) inner wall and the lateral wall of roller (10) tail end.
4. a kind of environment-friendly type cooling humidifying roller according to claim 3, it is characterised in that: the length of the metal film (31)
Degree is greater than or equal to the spacing between the inner wall of casing (30) and the lateral wall of roller (10) tail end.
5. a kind of environment-friendly type cooling humidifying roller according to claim 1, it is characterised in that: the inside of the sink (50)
It is provided with the second heat exchanger tube (51) of snakelike distribution.
6. a kind of environment-friendly type cooling humidifying roller according to claim 1, it is characterised in that: the bottom of the sink (50)
It is provided with tapping valve (53), the input terminal of the tapping valve (53) is connected to the inner cavity of sink (50).
7. a kind of environment-friendly type cooling humidifying roller according to claim 2, it is characterised in that: the shower tray (62) includes
The tail end of cylindric water tank (621), the water inlet pipe (61) is connected to the inner cavity of water tank (621), the outside of the water tank (621)
It is symmetrically distributed with more water pipes (622), the tail end closing of the water pipe (622), the head end and water tank of the water pipe (622)
(621) inner cavity connection, the side wall of the water pipe (622) are provided with multiple hole for water sprayings for facing roller (10) inner cavity
(6221)。
8. a kind of environment-friendly type cooling humidifying roller according to claim 2, it is characterised in that: the deslagging chamber (22) is to fall
Truncated cone-shaped structure.
9. a kind of environment-friendly type cooling humidifying roller according to claim 2, it is characterised in that: the scum pipe (23) it is upper
Portion is additionally provided with residual cake valve (231).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811025590.8A CN109253632A (en) | 2018-09-04 | 2018-09-04 | A kind of environment-friendly type cooling humidifying roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811025590.8A CN109253632A (en) | 2018-09-04 | 2018-09-04 | A kind of environment-friendly type cooling humidifying roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109253632A true CN109253632A (en) | 2019-01-22 |
Family
ID=65046677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811025590.8A Pending CN109253632A (en) | 2018-09-04 | 2018-09-04 | A kind of environment-friendly type cooling humidifying roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109253632A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237343A (en) * | 2021-05-13 | 2021-08-10 | 铜陵有色兴铜机电制造有限公司 | Dry fog presses down dirt cooling humidification device with spray mechanism |
| CN114739224A (en) * | 2022-04-26 | 2022-07-12 | 徐州新风空调设备有限公司 | Heat recovery unit of environment-friendly air return machine |
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| DE3616118A1 (en) * | 1986-05-13 | 1987-11-19 | Alois Fleig | Device for heat-treatment and/or moisture-treatment of pourable products |
| CN2431947Y (en) * | 2000-07-05 | 2001-05-30 | 花春梅 | Cooling humidifying rotary drum machine |
| CN201161929Y (en) * | 2008-01-31 | 2008-12-10 | 建业庆松集团有限公司 | Energy conservation humidification roller |
| CN201161930Y (en) * | 2008-01-31 | 2008-12-10 | 建业庆松集团有限公司 | Cooling humidifying roller |
| CN201548106U (en) * | 2009-10-29 | 2010-08-11 | 杨正清 | Inner cooled heat energy recycling and cooling rotary drum |
| CN107490298A (en) * | 2017-08-02 | 2017-12-19 | 铜陵有色兴铜机电制造有限公司 | A kind of cooling humidifying roller |
-
2018
- 2018-09-04 CN CN201811025590.8A patent/CN109253632A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3616118A1 (en) * | 1986-05-13 | 1987-11-19 | Alois Fleig | Device for heat-treatment and/or moisture-treatment of pourable products |
| CN2431947Y (en) * | 2000-07-05 | 2001-05-30 | 花春梅 | Cooling humidifying rotary drum machine |
| CN201161929Y (en) * | 2008-01-31 | 2008-12-10 | 建业庆松集团有限公司 | Energy conservation humidification roller |
| CN201161930Y (en) * | 2008-01-31 | 2008-12-10 | 建业庆松集团有限公司 | Cooling humidifying roller |
| CN201548106U (en) * | 2009-10-29 | 2010-08-11 | 杨正清 | Inner cooled heat energy recycling and cooling rotary drum |
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|---|
| 刘宝家等: "《节约能源1000例 2》", 31 August 1982, 科学技术文献出版社 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237343A (en) * | 2021-05-13 | 2021-08-10 | 铜陵有色兴铜机电制造有限公司 | Dry fog presses down dirt cooling humidification device with spray mechanism |
| CN114739224A (en) * | 2022-04-26 | 2022-07-12 | 徐州新风空调设备有限公司 | Heat recovery unit of environment-friendly air return machine |
| CN114739224B (en) * | 2022-04-26 | 2024-01-05 | 徐州新风空调设备有限公司 | Heat energy recovery device of environment-friendly return air machine |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190122 |
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| RJ01 | Rejection of invention patent application after publication |