CN219934725U - Drying tower waste gas waste heat recovery device - Google Patents
Drying tower waste gas waste heat recovery device Download PDFInfo
- Publication number
- CN219934725U CN219934725U CN202320831010.4U CN202320831010U CN219934725U CN 219934725 U CN219934725 U CN 219934725U CN 202320831010 U CN202320831010 U CN 202320831010U CN 219934725 U CN219934725 U CN 219934725U
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- China
- Prior art keywords
- heat exchange
- drying tower
- exchange box
- recovery device
- heat recovery
- 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.)
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- 238000001035 drying Methods 0.000 title claims abstract description 39
- 238000011084 recovery Methods 0.000 title claims abstract description 35
- 239000002918 waste heat Substances 0.000 title claims abstract description 35
- 239000002912 waste gas Substances 0.000 title claims abstract description 20
- 230000010405 clearance mechanism Effects 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 7
- 239000012535 impurity Substances 0.000 abstract description 13
- 238000004140 cleaning Methods 0.000 abstract description 7
- 239000007789 gas Substances 0.000 abstract description 7
- 230000007246 mechanism Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000001694 spray drying Methods 0.000 description 5
- 239000003814 drug Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 235000021539 instant coffee Nutrition 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
Classifications
-
- 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
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model provides a waste gas and waste heat recovery device of a drying tower, and belongs to the technical field of drying towers. This drying tower waste gas waste heat recovery device includes base, drying tower, heat exchange box and clearance mechanism, drying tower and heat exchange box fixed mounting are on base upper portion, and clearance mechanism includes support, screw thread piece, lead screw and brush board, and support slidable mounting is at heat exchange box inner chamber, screw thread piece fixed mounting in the support lower part. According to the utility model, the cleaning mechanism is arranged, the second sliding block is driven to move in the inner cavity of the sliding groove through the spring, the brush plate is driven to move towards the heat exchange tube and contact with the surface of the heat exchange tube, then the motor drives the screw rod to rotate, and the support is driven to move in the inner cavity of the heat exchange box along the direction of the guide rod through the threaded block, so that the heat exchange tube is cleaned and decontaminated through the brush plate in sequence, the impurities in the gas are prevented from being attached to the surface of the heat exchange tube, and the waste heat recovery efficiency is ensured.
Description
Technical Field
The utility model relates to the field of drying towers, in particular to a waste gas and waste heat recovery device of a drying tower.
Background
Spray drying towers are equipment used for drying biological pesticides, medicines, food microorganisms. Spray drying is a drying process in which the raw material liquid is put into an atomizer to be separated into mist drops, and the powder particle-shaped product is obtained by directly contacting hot air or other gases with the mist drops. Spray drying technology is widely used in the production process of detergents, dairy products, dehydrated foods, dyes, cements and fertilizers. The most common milk powder, instant coffee, instant food soup bases, etc. are the products obtained from the spray drying process. The spray drying technology has extremely special application in the pharmaceutical industry, greatly simplifies and shortens the process and time from the traditional Chinese medicine extracting solution to the semi-finished product or finished product of the preparation, and improves the production efficiency and the quality of medicines.
After the drying is finished, the air can be directly discharged, and a large amount of heat is still contained in the air, so that the waste heat of the air can be recycled, but after the conventional waste heat recovery device is used for a long time, impurities in the air can be attached to the inner cavity of the device, and the waste heat recovery efficiency is affected.
Disclosure of Invention
In order to overcome the above disadvantages, the present utility model provides a drying tower waste gas waste heat recovery device that overcomes or at least partially solves the above technical problems.
The utility model is realized in the following way:
the utility model provides a drying tower waste gas waste heat recovery device, which comprises a base, a drying tower, a heat exchange box and a cleaning mechanism, wherein the drying tower and the heat exchange box are fixedly arranged on the upper part of the base, and the cleaning mechanism comprises
The bracket is slidably arranged in the inner cavity of the heat exchange box;
the screw thread block is fixedly arranged at the lower part of the bracket, and the bottom of the inner cavity of the heat exchange box is symmetrically and fixedly provided with a first mounting seat;
the screw rod is rotatably arranged between the two first mounting seats, and the thread block is in threaded connection with the screw rod;
the brush plate is symmetrically and slidably arranged in the inner cavity of the bracket.
In a preferred scheme, the side wall of the bracket is symmetrically and fixedly provided with a first sliding block which is in sliding connection with the heat exchange box, and the upper part of the bracket is fixedly provided with a guide block.
In a preferred scheme, the upper part of the inner cavity of the heat exchange box is symmetrically and fixedly provided with second installation seats, and a guide rod is fixedly arranged between the two second installation seats and is in sliding connection with the guide block.
In a preferred scheme, a motor is fixedly arranged on the side wall of the heat exchange box, and the output end of the motor is fixedly connected with one end of the screw rod.
In a preferred scheme, a plurality of sliding grooves are symmetrically formed in the side wall of the support, second sliding blocks are fixedly arranged at two ends of the brush plate and are in sliding connection with the sliding grooves, springs are fixedly arranged in inner cavities of the sliding grooves, and the other ends of the springs are fixedly connected with the second sliding blocks.
In a preferred scheme, an air inlet pipe is communicated between the drying tower and the heat exchange box, and an exhaust pipe is communicated with the side wall of the heat exchange box.
In a preferred scheme, the mounting plate is symmetrically and fixedly arranged in the inner cavity of the heat exchange box, the connecting block is fixedly arranged between the mounting plate and the heat exchange box, and the heat exchange pipes are symmetrically arranged on the surface of the mounting plate.
In a preferred scheme, the side wall of the heat exchange box is communicated with a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is communicated with the upper part of the heat exchange pipe, and the liquid outlet pipe is communicated with the lower part of the heat exchange pipe.
In a preferred scheme, a first guide chute and a second guide chute are arranged at the bottom of the heat exchange box, a first material collecting box is fixedly arranged at the bottom of the first guide chute, and a second material collecting box is fixedly arranged at the bottom of the second guide chute.
In a preferred embodiment, the heat exchanging box inner cavity is detachably provided with a filter plate.
The utility model provides a drying tower waste gas waste heat recovery device, which has the beneficial effects that:
1. through setting up clearance mechanism, through the spring, drive second slider is removed at the spout inner chamber, drives the brush board and removes to the heat exchange tube, contacts with heat exchange tube surface, then motor drive lead screw rotates, moves along the guide arm direction at heat exchange box inner chamber through screw thread piece drive support to clear up the edulcoration through the brush board in proper order to the heat exchange tube, prevent to let in impurity in the gas and attach on heat exchange tube surface, guarantee waste heat recovery efficiency.
2. Through setting up the heat exchange pipe, the steam of drying completion is sent into the heat exchange case through the intake pipe in, the steam can carry out preliminary filtration with leading into the hot gas in the heat exchange case through the filter, filterable impurity gets into the second through the second baffle box and gathers materials the case and concentrate the clearance, then the steam heats the heat exchange pipe of fixed mounting at mounting panel surface, let in cold water to the heat exchange pipe through the feed liquor pipe, can heat cold water when flowing through the heat exchange pipe, reach waste heat recovery purpose, the hot water of heating completion is reserve through the fluid-discharge tube discharge, realize waste heat recovery.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a front view in cross section according to an embodiment of the present utility model;
FIG. 2 is a perspective view of an embodiment of the present utility model;
FIG. 3 is a perspective view of a cleaning mechanism according to an embodiment of the present utility model;
FIG. 4 is an enlarged view of FIG. 3A according to an embodiment of the present utility model;
fig. 5 is a perspective view of a mounting plate according to an embodiment of the present utility model.
In the figure: 1. a base; 2. a drying tower; 3. a heat exchange box; 4. an air inlet pipe; 5. an exhaust pipe; 6. a cleaning mechanism; 601. a bracket; 602. a first slider; 603. a guide block; 604. a screw block; 605. a first mount; 606. a screw rod; 607. a motor; 608. a second mounting base; 609. a guide rod; 610. a chute; 611. a second slider; 612. brushing a plate; 613. a spring; 7. a mounting plate; 8. a connecting block; 9. a heat exchange tube; 10. a liquid inlet pipe; 11. a liquid discharge pipe; 12. a first guide chute; 13. a first collection box; 14. a filter plate; 15. a second guide chute; 16. and a second collection box.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
Examples
Referring to fig. 1-5, the present utility model provides a technical solution: the utility model provides a drying tower waste gas waste heat recovery device, including base 1, drying tower 2, heat exchange box 3 and clearance mechanism 6, drying tower 2 and heat exchange box 3 fixed mounting are in base 1 upper portion, clearance mechanism 6 includes support 601, screw thread piece 604, lead screw 606 and brush board 612, support 601 slidable mounting is in heat exchange box 3 inner chamber for install brush board 612, screw thread piece 604 fixed mounting is in support 601 lower part, be used for connecting lead screw 606, heat exchange box 3 inner chamber bottom symmetry fixed mounting has first mount pad 605, be used for installing lead screw 606, lead screw 606 rotates and installs between two first mount pads 605, be used for driving support 601, screw thread piece 604 and lead screw 606 threaded connection, when lead screw 606 rotates, accessible screw thread piece 604 drives support 601 and removes at heat exchange box 3 inner chamber, brush board 612 symmetry slidable mounting is in support 601 inner chamber, be used for clearing up heat exchange tube 9.
Referring to fig. 1 to 4, in a preferred embodiment, a first slider 602 is symmetrically and fixedly installed on a side wall of a bracket 601 and is used for connecting a heat exchange box 3, the first slider 602 is slidably connected with the heat exchange box 3, a guide block 603 is fixedly installed on the upper portion of the bracket 601 and is used for connecting a guide rod 609, a second installation seat 608 is symmetrically and fixedly installed on the upper portion of an inner cavity of the heat exchange box 3 and is used for installing the guide rod 609, a guide rod 609 is fixedly installed between the two second installation seats 608, the guide rod 609 is slidably connected with the guide block 603 and plays a guiding role on the bracket 601, a motor 607 is fixedly installed on the side wall of the heat exchange box 3 and is electrically connected with an external power supply and is used for driving a lead screw 606, and an output end of the motor 607 is fixedly connected with one end of the lead screw 606.
Referring to fig. 1-4, in a preferred embodiment, the side wall of the bracket 601 is symmetrically provided with a plurality of sliding grooves 610 for connecting with the second sliding blocks 611, two ends of the brush board 612 are fixedly provided with the second sliding blocks 611 for connecting with the brush board 612, the second sliding blocks 611 are slidably connected with the sliding grooves 610, the inner cavity of the sliding grooves 610 is fixedly provided with a spring 613 for driving the spring 613, the other end of the spring 613 is fixedly connected with the second sliding blocks 611, and under the action of the spring 613, the second sliding blocks 611 are driven to move in the inner cavity of the sliding grooves 610 to drive the brush board 612 to move towards the heat exchange tube 9 so as to contact with the surface of the heat exchange tube 9.
In a preferred scheme, during use, the second sliding block 611 is driven to move in the inner cavity of the sliding groove 610 through the spring 613 to drive the brush plate 612 to move towards the heat exchange tube 9 and contact the surface of the heat exchange tube 9, then the motor 607 drives the screw rod 606 to rotate, and the bracket 601 is driven to move in the inner cavity of the heat exchange box 3 along the direction of the guide rod 609 through the threaded block 604, so that the heat exchange tube 9 is cleaned and decontaminated through the brush plate 612 in sequence, and impurities in the introduced gas are prevented from adhering to the surface of the heat exchange tube 9, and the waste heat recovery efficiency is ensured.
Referring to fig. 1 to 5, in a preferred embodiment, an air inlet pipe 4 is communicated between a drying tower 2 and a heat exchange box 3, the dried hot air is sent into the heat exchange box 3 through the air inlet pipe 4, the side wall of the heat exchange box 3 is communicated with an air outlet pipe 5, after heat recovery, the air is discharged out of the heat exchange box 3 through the air outlet pipe 5, an installation plate 7 is symmetrically and fixedly installed in the inner cavity of the heat exchange box 3 and used for installing a heat exchange pipe 9, a connecting block 8 is fixedly installed between the installation plate 7 and the heat exchange box 3 and used for fixing the installation plate 7, the heat exchange pipe 9 is symmetrically installed on the surface of the installation plate 7, and after cold water is introduced into the heat exchange pipe 9, the heat exchange pipe 9 is heated by introducing hot air, so that the cold water is heated, and the purpose of waste heat recovery is achieved; the side wall of the heat exchange box 3 is communicated with a liquid inlet pipe 10 and a liquid discharge pipe 11, the liquid inlet pipe 10 is communicated with the upper part of the heat exchange pipe 9 and used for introducing cold water, and the liquid discharge pipe 11 is communicated with the lower part of the heat exchange pipe 9 and used for discharging hot water.
Referring to fig. 1-2, in a preferred embodiment, a first guide chute 12 and a second guide chute 15 are formed at the bottom of the heat exchange tank 3, a first collecting tank 13 is fixedly installed at the bottom of the first guide chute 12, and after impurities on the surface of the heat exchange tube 9 are brushed off by a brush board 612, the impurities enter the first collecting tank 13 through the first guide chute 12, so that concentrated cleaning is facilitated; the bottom of the second guide chute 15 is fixedly provided with a second material collecting box 16, the inner cavity of the heat exchange box 3 is detachably provided with a filter plate 14, hot air guided into the heat exchange box 3 can be subjected to preliminary filtration through the filter plate 14, and filtered impurities enter the second material collecting box 16 through the second guide chute 15 to be intensively cleaned, so that the waste heat recovery efficiency is ensured.
In a preferred embodiment, during use, the hot air after drying is sent into the heat exchange box 3 through the air inlet pipe 4, the hot air can be initially filtered by the filter plate 14 and guided into the heat exchange box 3, filtered impurities enter the second collecting box 16 through the second guide chute 15 to be intensively cleaned, then the hot air heats the heat exchange pipe 9 fixedly arranged on the surface of the mounting plate 7, cold water is introduced into the heat exchange pipe 9 through the liquid inlet pipe 10, the cold water can be heated when flowing through the heat exchange pipe 9, the purpose of waste heat recovery is achieved, the heated hot water is discharged for standby through the liquid discharge pipe 11, and the purpose of waste heat recovery is achieved.
Specifically, the working process or working principle of the drying tower waste gas and waste heat recovery device is as follows: during the use, the steam that the dryness accomplished is sent into heat exchange case 3 through intake pipe 4, and the steam can carry out preliminary filtration with leading into heat exchange case 3 hot gas through filter 14, and filterable impurity gets into second collection case 16 through second baffle box 15 and concentrates the clearance, then the steam heats the heat exchange pipe 9 of fixed mounting at mounting panel 7 surface, lets in cold water through feed liquor pipe 10 to heat exchange pipe 9, can heat cold water when flowing through heat exchange pipe 9, reaches waste heat recovery purpose, and the hot water that the heating was accomplished is reserve through fluid-discharge tube 11 discharge, realizes waste heat recovery.
After the device is used for a long time, the second sliding block 611 is driven to move in the inner cavity of the sliding groove 610 through the spring 613, the brush plate 612 is driven to move towards the heat exchange tube 9 and contact with the surface of the heat exchange tube 9, then the motor 607 drives the screw rod 606 to rotate, the bracket 601 is driven to move along the direction of the guide rod 609 in the inner cavity of the heat exchange box 3 through the threaded block 604, so that the heat exchange tube 9 is cleaned and decontaminated through the brush plate 612 in sequence, the impurities in the gas are prevented from adhering to the surface of the heat exchange tube 9, the waste heat recovery efficiency is ensured, and after the impurities on the surface of the heat exchange tube 9 are brushed by the brush plate 612, the impurities enter the first collecting box 13 through the first guide groove 12, so that the concentrated cleaning is facilitated.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
It should be noted that, the motor 607 is a device or apparatus existing in the prior art, or a device or apparatus that can be implemented in the prior art, and the power supply, the specific composition and the principle thereof will be clear to those skilled in the art, so that detailed description thereof will not be repeated.
Claims (10)
1. The utility model provides a drying tower waste gas waste heat recovery device, its characterized in that includes base (1), drying tower (2), heat exchange box (3) and clearance mechanism (6), drying tower (2) and heat exchange box (3) fixed mounting are on base (1) upper portion, clearance mechanism (6) include
The bracket (601) is slidably arranged in the inner cavity of the heat exchange box (3);
the screw thread block (604), the screw thread block (604) is fixedly arranged at the lower part of the bracket (601), and the bottom of the inner cavity of the heat exchange box (3) is symmetrically and fixedly provided with a first mounting seat (605);
the screw rod (606) is rotatably arranged between the two first mounting seats (605), and the threaded block (604) is in threaded connection with the screw rod (606);
and the brush plate (612) is symmetrically and slidably arranged in the inner cavity of the bracket (601).
2. The drying tower waste gas waste heat recovery device according to claim 1, wherein first sliding blocks (602) are symmetrically and fixedly arranged on the side walls of the support (601), the first sliding blocks (602) are in sliding connection with the heat exchange box (3), and guide blocks (603) are fixedly arranged on the upper portion of the support (601).
3. The drying tower waste gas waste heat recovery device according to claim 2, wherein second installation seats (608) are symmetrically and fixedly installed on the upper portion of an inner cavity of the heat exchange box (3), guide rods (609) are fixedly installed between the two second installation seats (608), and the guide rods (609) are in sliding connection with the guide blocks (603).
4. The drying tower waste gas waste heat recovery device according to claim 1, wherein a motor (607) is fixedly arranged on the side wall of the heat exchange box (3), and the output end of the motor (607) is fixedly connected with one end of a screw rod (606).
5. The drying tower waste gas waste heat recovery device according to claim 1, wherein a plurality of sliding grooves (610) are symmetrically formed in the side wall of the support (601), second sliding blocks (611) are fixedly arranged at two ends of each brush plate (612), the second sliding blocks (611) are slidably connected with the sliding grooves (610), springs (613) are fixedly arranged in inner cavities of the sliding grooves (610), and the other ends of the springs (613) are fixedly connected with the second sliding blocks (611).
6. The drying tower waste gas waste heat recovery device according to claim 1, wherein an air inlet pipe (4) is communicated between the drying tower (2) and the heat exchange box (3), and an exhaust pipe (5) is communicated with the side wall of the heat exchange box (3).
7. The drying tower waste gas waste heat recovery device according to claim 1, wherein the installation plates (7) are symmetrically and fixedly installed in the inner cavity of the heat exchange box (3), connecting blocks (8) are fixedly installed between the installation plates (7) and the heat exchange box (3), and heat exchange pipes (9) are symmetrically installed on the surface of the installation plates (7).
8. The drying tower waste gas waste heat recovery device according to claim 7, wherein a liquid inlet pipe (10) and a liquid outlet pipe (11) are communicated with the side wall of the heat exchange box (3), the liquid inlet pipe (10) is communicated with the upper portion of the heat exchange pipe (9), and the liquid outlet pipe (11) is communicated with the lower portion of the heat exchange pipe (9).
9. The drying tower waste gas waste heat recovery device according to claim 1, wherein a first guide chute (12) and a second guide chute (15) are arranged at the bottom of the heat exchange chute (3), a first material collecting box (13) is fixedly arranged at the bottom of the first guide chute (12), and a second material collecting box (16) is fixedly arranged at the bottom of the second guide chute (15).
10. A drying tower waste gas waste heat recovery device according to claim 1, wherein the inner cavity of the heat exchanging box (3) is detachably provided with a filter plate (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320831010.4U CN219934725U (en) | 2023-04-14 | 2023-04-14 | Drying tower waste gas waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320831010.4U CN219934725U (en) | 2023-04-14 | 2023-04-14 | Drying tower waste gas waste heat recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219934725U true CN219934725U (en) | 2023-10-31 |
Family
ID=88486589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320831010.4U Active CN219934725U (en) | 2023-04-14 | 2023-04-14 | Drying tower waste gas waste heat recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219934725U (en) |
-
2023
- 2023-04-14 CN CN202320831010.4U patent/CN219934725U/en active Active
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