CN215939519U - Single-tower dryer - Google Patents
Single-tower dryer Download PDFInfo
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- CN215939519U CN215939519U CN202121444855.5U CN202121444855U CN215939519U CN 215939519 U CN215939519 U CN 215939519U CN 202121444855 U CN202121444855 U CN 202121444855U CN 215939519 U CN215939519 U CN 215939519U
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Abstract
The utility model relates to the field of dryers, and discloses a single-tower dryer which comprises a blower air suction filter (10), a blower (7), a heater (2), an adsorption tower (8), a first regeneration pipeline cooler (1101) and a second regeneration pipeline cooler (1102), wherein one end of the blower air suction filter (10) is communicated with the atmosphere, the other end of the blower air suction filter (10) is connected with the blower (7), the blower (7) is connected with the heater (2), and the heater (2) is connected with the adsorption tower (8); the adsorption tower (8) is connected with the first regeneration pipeline cooler (1101), the first regeneration pipeline cooler (1101) is connected with the air blower (7), the air blower (7) is connected with the second regeneration pipeline cooler (1102), and the second regeneration pipeline cooler (1102) is connected with the adsorption tower (8). The utility model has the advantages of low comprehensive energy consumption, two-stage cooling and high safety.
Description
Technical Field
The utility model relates to the field of dryers, in particular to a single-tower dryer.
Background
The adsorption dryer achieves the drying effect through the contact mode of the adsorbent, because the capacity of air for containing water vapor is in inverse proportion to the pressure, part of air after drying is decompressed and expanded to the atmospheric pressure, the expanded air becomes drier through the pressure change, then the expanded air flows through a drying agent layer which is not communicated with air flow and needs to be regenerated, the moisture in the drying agent is sucked out by the dried regenerated air, and the regenerated air is taken out of the dryer to achieve the purpose of dehumidification. The utility model of application No. CN201711369751.0 discloses a double-tower alternating type adsorption dryer, which provides a double-tower alternating type adsorption dryer, comprising a tower I and a tower II, wherein the tower I and the tower II are both cylindrical structures, the tower I and the tower II are respectively vertically arranged from left to right, the top ends of the tower I and the tower II are respectively provided with a feed inlet, the feed inlet is provided with an electric control valve, the upper end of the feed inlet is connected with a feed pipeline, one end of the feed pipeline is connected with a raw material tank, the inside of the tower I and the tower II is provided with a plurality of adsorption layers in parallel from top to bottom, the upper end surface and the lower end surface of each adsorption layer are respectively provided with a plurality of holes, the outside of the holes is funnel-shaped structures with outward openings, the inside of the holes is connected with drying contact channels, adsorbents are filled between the drying contact channels, the inside of the adsorbents is embedded with a humidity sensor, the utility model discloses a tower, including a tower, a humidity sensor, a tower, an electric control cabinet, an automatic control system, a PLC controller, an automatic control system output is connected, the output of humidity sensor is connected to automatic control system.
However, the existing drying machine has the following defects: 1. the finished gas is adopted for regeneration, so that the gas consumption is high and the comprehensive energy consumption is high; 2. the double-tower type dryer is ultrahigh in size or ultra-wide, and is difficult to transport; 3. regeneration and cold blowing are carried out according to fixed time, and energy cannot be saved when the load is low; 4. the cold blowing gas temperature is high, the cold blowing effect is not good, and the dew point difference is generated when the adsorption process is switched.
SUMMERY OF THE UTILITY MODEL
The utility model provides a single-tower dryer aiming at the defects in the prior art.
In order to solve the technical problem, the utility model is solved by the following technical scheme:
the single-tower dryer comprises a blower air suction filter, a blower, a heater, an adsorption tower, a first regeneration pipeline cooler and a second regeneration pipeline cooler, wherein one end of the blower air suction filter is communicated with the atmosphere, the other end of the blower air suction filter is connected with the blower, the blower is connected with the heater, and the heater is connected with the adsorption tower; the adsorption tower is connected with the first regeneration pipeline cooler, the first regeneration pipeline cooler is connected with the air blower, the air blower is connected with the second regeneration pipeline cooler, and the second regeneration pipeline cooler is connected with the adsorption tower.
Preferably, the adsorption tower further comprises a manual valve and a sixth pneumatic butterfly valve, the blower is connected with the heater through the manual valve, and the heater is connected with the adsorption tower through the sixth pneumatic butterfly valve.
Preferably, the adsorption tower further comprises a first low-pressure safety valve, a second low-pressure safety valve, a fifth pneumatic butterfly valve, a fourth pneumatic butterfly valve and a check valve, the adsorption tower is connected with the first low-pressure safety valve through the fifth pneumatic butterfly valve, the first low-pressure safety valve is connected with the first regeneration pipeline cooler, the second regeneration pipeline cooler is connected with the fourth pneumatic butterfly valve through the second low-pressure safety valve, the fourth pneumatic butterfly valve is connected with the check valve, and the check valve is connected with the adsorption tower.
Preferably, the adsorption tower further comprises a fifth temperature sensor, an eleventh temperature sensor and a twelfth temperature sensor, wherein the fifth temperature sensor is positioned at the outlet of the adsorption tower, and the eleventh temperature sensor and the twelfth temperature sensor are positioned in the adsorption tower.
Preferably, the device also comprises an air inlet cooler, a pre-filter, a first pneumatic butterfly valve, a second pneumatic butterfly valve, a ninth pneumatic butterfly valve, a tenth pneumatic butterfly valve and a dust removal filter, wherein the air inlet cooler is connected with the pre-filter, the pre-filter is connected with the adsorption tower through the first pneumatic butterfly valve, and the pre-filter is connected with the adsorption tower through the tenth pneumatic butterfly valve; the dust removal filter is connected with the adsorption tower through a second pneumatic butterfly valve, and the dust removal filter is connected with the adsorption tower through a ninth pneumatic butterfly valve.
Preferably, the adsorption tower is connected with a pressure gauge, the adsorption tower is connected with an eighth pneumatic butterfly valve, and the eighth pneumatic butterfly valve is connected with a silencer.
Due to the adoption of the technical scheme, the utility model has the remarkable technical effects that: 1. by adding the blower 7, the blower 7 sucks ambient air, and adopts a blowing heating mode for regeneration and cold blowing, so that compressed air is not consumed, finished gas is not consumed, and comprehensive energy consumption is low. 2. A first regeneration pipeline cooler 1101 and a second regeneration pipeline cooler 1102 are added in the system, two-stage cooling is adopted in a cold blowing stage, and the temperature of cold blowing air is controlled to be below 20 ℃, so that the cold blowing effect of blowing air is guaranteed. 3. According to the actual use working condition, after regeneration is completed each time, the adsorption tower 8 works for 8 hours, and compared with the traditional multi-tower structure, the adsorption tower 8 structure has the advantages of reducing the size of the whole machine, facilitating transportation and field installation and reducing the height of the whole machine. 4. A first low pressure relief valve 1401 and a second low pressure relief valve 1402 are added to the piping and the vicinity of the second regenerative pipe cooler 1102, respectively, so that the safety of the apparatus can be improved. 5. And a fifth temperature sensor T5 is added to detect the temperature of the outlet of the adsorption tower 8, and a load energy-saving control mode is adopted, so that the energy-saving state is achieved.
Drawings
Fig. 1 is a schematic view of the structural framework of the present invention.
Fig. 2 is a partial enlarged view of M in fig. 1.
Fig. 3 is a schematic diagram of a first viewing angle according to the present invention.
Fig. 4 is a schematic diagram of a second viewing angle according to the present invention.
Fig. 5 is a schematic diagram of a third viewing angle of the present invention.
The names of the parts indicated by the numerical references in the above figures are as follows: wherein, 1-air inlet cooler, 2-heater, 3-muffler, 4-pressure gauge, 5-dust-removing filter, 6-manual valve, 7-blower, 8-adsorption tower, 9-pre-filter, 10-blower suction filter, 1101-first regeneration pipeline cooler, 1102-second regeneration pipeline cooler, 13-check valve, 1401-first low-pressure safety valve, 1402-second low-pressure safety valve, A1-first pneumatic butterfly valve, A2-second pneumatic butterfly valve, A3-third pneumatic butterfly valve, A4-fourth pneumatic butterfly valve, A5-fifth pneumatic butterfly valve, A6-sixth pneumatic butterfly valve, A7-seventh pneumatic butterfly valve, A8-eighth pneumatic butterfly valve, A9-ninth pneumatic butterfly valve, A35 10-tenth pneumatic butterfly valve, A11-eleventh pneumatic butterfly valve, A12-twelfth pneumatic butterfly valve, V1-first drain valve, V2-second drain valve, V3-third pneumatic butterfly valve, A11-eleventh pneumatic butterfly valve, T1-first temperature sensor, T2-second temperature sensor, T3-third temperature sensor, T4-fourth temperature sensor, T5-fifth temperature sensor, T6-sixth temperature sensor, T7-seventh temperature sensor, T8-eighth temperature sensor, T9-ninth temperature sensor, T10-tenth temperature sensor, T11-eleventh temperature sensor, T12-twelfth temperature sensor, P1-first pressure sensor, P2-second pressure sensor, P3-third pressure sensor, P4-fourth pressure sensor, P5-fifth pressure sensor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
The single-tower dryer comprises a blower suction filter 10, a blower 7, a heater 2, an adsorption tower 8, a first regeneration pipeline cooler 1101 and a second regeneration pipeline cooler 1102, wherein one end of the blower suction filter 10 is communicated with the atmosphere, the other end of the blower suction filter 10 is connected with the blower 7, the blower 7 is connected with the heater 2, and the heater 2 is connected with the adsorption tower 8; the adsorption tower 8 is connected to the first regeneration line cooler 1101, the first regeneration line cooler 1101 is connected to the blower 7, the blower 7 is connected to the second regeneration line cooler 1102, and the second regeneration line cooler 1102 is connected to the adsorption tower 8. By adding the blower 7, the blower 7 sucks ambient air, and adopts a blowing heating mode for regeneration and cold blowing, so that compressed air is not consumed, finished gas is not consumed, and comprehensive energy consumption is low. A first regeneration pipeline cooler 1101 and a second regeneration pipeline cooler 1102 are added in the system, two-stage cooling is adopted in a cold blowing stage, and the temperature of cold blowing air is controlled to be below 20 ℃, so that the cold blowing effect of blowing air is guaranteed.
The device also comprises a manual valve 6 and a sixth pneumatic butterfly valve A6, wherein the blower 7 is connected with the heater 2 through the manual valve 6, and the heater 2 is connected with the adsorption tower 8 through a sixth pneumatic butterfly valve A6.
The adsorption tower further comprises a first low-pressure safety valve 1401, a second low-pressure safety valve 1402, a fifth pneumatic butterfly valve A5, a fourth pneumatic butterfly valve A4 and a check valve 13, the adsorption tower 8 is connected with the first low-pressure safety valve 1401 through the fifth pneumatic butterfly valve A5, the first low-pressure safety valve 1401 is connected with the first regeneration pipeline cooler 1101, the second regeneration pipeline cooler 1102 is connected with the fourth pneumatic butterfly valve A4 through the second low-pressure safety valve 1402, the fourth pneumatic butterfly valve A4 is connected with the check valve 13, and the check valve 13 is connected with the adsorption tower 8. A first low pressure relief valve 1401 and a second low pressure relief valve 1402 are added to the piping and the vicinity of the second regenerative pipe cooler 1102, respectively, so that the safety of the apparatus can be improved.
And the adsorption tower further comprises a fifth temperature sensor T5, an eleventh temperature sensor T11 and a twelfth temperature sensor T12, wherein the fifth temperature sensor T5 is positioned at the outlet of the adsorption tower, and the eleventh temperature sensor T11 and the twelfth temperature sensor T12 are positioned in the adsorption tower. And a fifth temperature sensor T5 is added to detect the temperature of the outlet of the adsorption tower 8, and a load energy-saving control mode is adopted, so that the energy-saving state is achieved.
The device also comprises an air inlet cooler 1, a pre-filter 9, a first pneumatic butterfly valve A1, a second pneumatic butterfly valve A2, a ninth pneumatic butterfly valve A9, a tenth pneumatic butterfly valve A10 and a dust removal filter 5, wherein the air inlet cooler 1 is connected with the pre-filter 9, the pre-filter 9 is connected with the adsorption tower 8 through the first pneumatic butterfly valve A1, and the pre-filter 9 is connected with the adsorption tower 8 through the tenth pneumatic butterfly valve A10; the dust removing filter 5 is connected to the adsorption tower 8 through a second pneumatic butterfly valve a2, and the dust removing filter 5 is connected to the adsorption tower 8 through a ninth pneumatic butterfly valve a 9.
The adsorption tower is connected with a pressure gauge 4, the adsorption tower is connected with an eighth pneumatic butterfly valve A8, and the eighth pneumatic butterfly valve A8 is connected with a silencer 3.
The work flow of the application is as follows:
the operation method of the single-tower dryer comprises the single-tower dryer and an adsorption method, wherein the adsorption method comprises the following steps:
the first step is as follows: closing the first pneumatic butterfly valve A1 and the second pneumatic butterfly valve A2, opening the ninth pneumatic butterfly valve A9 and the tenth pneumatic butterfly valve A10, enabling downstream compressed air to enter the adsorption tower 8 through the dust removal filter 5 for pressurizing, and stopping pressurizing after a set value of a third pressure sensor P3 is reached;
the second step is that: opening a first pneumatic butterfly valve A1 and a second pneumatic butterfly valve A2, closing a ninth pneumatic butterfly valve A9 and a tenth pneumatic butterfly valve A10, allowing 40-degree compressed air to enter an air inlet cooler 1 to exchange heat with frozen water, cooling to below 15 ℃, condensing partial vapor in the compressed air into liquid water, then allowing the liquid water to enter a pre-filter 9 to remove the liquid water, and discharging the liquid water through a first drain valve V1; the compressed air enters the adsorption tower 8 through the first pneumatic butterfly valve A1, the water vapor in the compressed air is adsorbed by the adsorbent, the dew point reaches below-60 ℃, the compressed air enters the dust removal filter 5 through the second pneumatic butterfly valve A2, and the compressed air after dust removal enters a downstream air pipeline.
Also included is a regeneration method:
step one, pressure relief: the eighth pneumatic butterfly valve A8 is opened, and the compressed air in the tower 8 is discharged into the environment through the eighth pneumatic butterfly valve A8 and the silencer 3 until the pressure is reduced to zero;
step two, heating and regenerating:
and starting the air blower 7, sucking ambient air, discharging the ambient air from the air blower 7, entering the heater 2 through the manual valve 6 for heating, heating to 195 ℃, enabling the hot air to enter the right tower of the adsorption tower 8 through the sixth pneumatic butterfly valve A6 along the pipeline, entering the wet adsorbent bed from top to bottom, desorbing the water after absorbing heat to become water vapor, and discharging the water vapor and the air into the ambient atmosphere through the seventh pneumatic butterfly valve A7 through the pipeline. When the fifth temperature sensor T5 detects that the temperature reaches the set value, the blower 7 stops running first, the heater 2 stops heating again, and the cold blowing stage is started;
step three, cold blowing of an adsorption tower:
when the heating process of the adsorption tower 8 is finished, the adsorbent bed layer is in a high-temperature state, the adsorbent is inactive at the moment, the adsorption capacity is poor, and the adsorbent can recover the activity only by blowing the temperature of the bed layer to be below 40 ℃; when the cold blowing flow is started, the heater 2 stops, the air blower 7 sucks in circulating gas, the temperature of the circulating gas can rise by 10-15 degrees, the circulating gas firstly enters the second regeneration pipeline cooler 1102 to be cooled to a temperature below 20 degrees, the circulating gas enters the adsorption tower 8 through the fourth pneumatic butterfly valve A4 and the check valve 13 after being cooled, cold blowing is carried out on the adsorbent from bottom to top, the circulating gas and the adsorbent exchange heat, after the temperature rises, the circulating gas enters the second regeneration pipeline cooler 1101 through the fifth pneumatic butterfly valve A5, the temperature is reduced to a temperature below 20 degrees again, the air blower 7 is cooled to circulate, and the temperature of an adsorbent bed is gradually reduced through a closed internal circulation mode. When the fifth temperature sensor T5 detects that the temperature reaches the set value, the blower 7 stops operating and enters the standby stage.
The utility model has the following effects: 1. by adding the blower 7, the blower 7 sucks ambient air, and adopts a blowing heating mode for regeneration and cold blowing, so that compressed air is not consumed, finished gas is not consumed, and comprehensive energy consumption is low. 2. A first regeneration pipeline cooler 1101 and a second regeneration pipeline cooler 1102 are added in the system, two-stage cooling is adopted in a cold blowing stage, and the temperature of cold blowing air is controlled to be below 20 ℃, so that the cold blowing effect of blowing air is guaranteed. 3. According to the actual use working condition, after regeneration is completed each time, the adsorption tower 8 works for 8 hours, and compared with the traditional multi-tower structure, the adsorption tower 8 structure has the advantages of reducing the size of the whole machine, facilitating transportation and field installation and reducing the height of the whole machine. 4. A first low pressure relief valve 1401 and a second low pressure relief valve 1402 are added to the piping and the vicinity of the second regenerative pipe cooler 1102, respectively, so that the safety of the apparatus can be improved. 5. And a fifth temperature sensor T5 is added to detect the temperature of the outlet of the adsorption tower 8, and a load energy-saving control mode is adopted, so that the energy-saving state is achieved.
Example 2
The single-tower dryer comprises a blower suction filter 10, a blower 7, a heater 2, an adsorption tower 8, a first regeneration pipeline cooler 1101 and a second regeneration pipeline cooler 1102, wherein one end of the blower suction filter 10 is communicated with the atmosphere, the other end of the blower suction filter 10 is connected with the blower 7, the blower 7 is connected with the heater 2, and the heater 2 is connected with the adsorption tower 8; the adsorption tower 8 is connected to the first regeneration line cooler 1101, the first regeneration line cooler 1101 is connected to the blower 7, the blower 7 is connected to the second regeneration line cooler 1102, and the second regeneration line cooler 1102 is connected to the adsorption tower 8. By adding the blower 7, the blower 7 sucks ambient air, and adopts a blowing heating mode for regeneration and cold blowing, so that compressed air is not consumed, finished gas is not consumed, and comprehensive energy consumption is low. A first regeneration pipeline cooler 1101 and a second regeneration pipeline cooler 1102 are added in the system, two-stage cooling is adopted in a cold blowing stage, and the temperature of cold blowing air is controlled to be below 20 ℃, so that the cold blowing effect of blowing air is guaranteed.
Example 3
The single-tower dryer comprises a blower suction filter 10, a blower 7, a heater 2, an adsorption tower 8, a first regeneration pipeline cooler 1101 and a second regeneration pipeline cooler 1102, wherein one end of the blower suction filter 10 is communicated with the atmosphere, the other end of the blower suction filter 10 is connected with the blower 7, the blower 7 is connected with the heater 2, and the heater 2 is connected with the adsorption tower 8; the adsorption tower 8 is connected to the first regeneration line cooler 1101, the first regeneration line cooler 1101 is connected to the blower 7, the blower 7 is connected to the second regeneration line cooler 1102, and the second regeneration line cooler 1102 is connected to the adsorption tower 8. By adding the blower 7, the blower 7 sucks ambient air, and adopts a blowing heating mode for regeneration and cold blowing, so that compressed air is not consumed, finished gas is not consumed, and comprehensive energy consumption is low. A first regeneration pipeline cooler 1101 and a second regeneration pipeline cooler 1102 are added in the system, two-stage cooling is adopted in a cold blowing stage, and the temperature of cold blowing air is controlled to be below 20 ℃, so that the cold blowing effect of blowing air is guaranteed.
The device also comprises a manual valve 6 and a sixth pneumatic butterfly valve A6, wherein the blower 7 is connected with the heater 2 through the manual valve 6, and the heater 2 is connected with the adsorption tower 8 through a sixth pneumatic butterfly valve A6.
The adsorption tower further comprises a first low-pressure safety valve 1401, a second low-pressure safety valve 1402, a fifth pneumatic butterfly valve A5, a fourth pneumatic butterfly valve A4 and a check valve 13, the adsorption tower 8 is connected with the first low-pressure safety valve 1401 through the fifth pneumatic butterfly valve A5, the first low-pressure safety valve 1401 is connected with the first regeneration pipeline cooler 1101, the second regeneration pipeline cooler 1102 is connected with the fourth pneumatic butterfly valve A4 through the second low-pressure safety valve 1402, the fourth pneumatic butterfly valve A4 is connected with the check valve 13, and the check valve 13 is connected with the adsorption tower 8. A first low pressure relief valve 1401 and a second low pressure relief valve 1402 are added to the piping and the vicinity of the second regenerative pipe cooler 1102, respectively, so that the safety of the apparatus can be improved.
Example 4
The same as example 1, except that in the second step of the regeneration process, the blower 7 was turned on, ambient air was sucked in, discharged from the blower 7, and introduced into the heater 2 through the manual valve 6 to be heated to 180 ℃.
Example 5
The same as example 1, except that in the second step of the regeneration process, the blower 7 was turned on, ambient air was sucked in, discharged from the blower 7, and introduced into the heater 2 through the manual valve 6 to be heated to 200 ℃.
Claims (6)
1. Single tower desiccator, its characterized in that: the adsorption tower comprises a blower air suction filter (10), a blower (7), a heater (2), an adsorption tower (8), a first regeneration pipeline cooler (1101) and a second regeneration pipeline cooler (1102), wherein one end of the blower air suction filter (10) is communicated with the atmosphere, the other end of the blower air suction filter (10) is connected with the blower (7), the blower (7) is connected with the heater (2), and the heater (2) is connected with the adsorption tower (8); the adsorption tower (8) is connected with the first regeneration pipeline cooler (1101), the first regeneration pipeline cooler (1101) is connected with the air blower (7), the air blower (7) is connected with the second regeneration pipeline cooler (1102), and the second regeneration pipeline cooler (1102) is connected with the adsorption tower (8).
2. The single tower dryer of claim 1, wherein: the adsorption tower is characterized by further comprising a manual valve (6) and a sixth pneumatic butterfly valve (A6), the blower (7) is connected with the heater (2) through the manual valve (6), and the heater (2) is connected with the adsorption tower (8) through the sixth pneumatic butterfly valve (A6).
3. The single tower dryer of claim 1, wherein: the adsorption tower further comprises a first low-pressure safety valve (1401), a second low-pressure safety valve (1402), a fifth pneumatic butterfly valve (A5), a fourth pneumatic butterfly valve (A4) and a check valve (13), the adsorption tower (8) is connected with the first low-pressure safety valve (1401) through the fifth pneumatic butterfly valve (A5), the first low-pressure safety valve (1401) is connected with the first regeneration pipeline cooler (1101), the second regeneration pipeline cooler (1102) is connected with the fourth pneumatic butterfly valve (A4) through the second low-pressure safety valve (1402), the fourth pneumatic butterfly valve (A4) is connected with the check valve (13), and the check valve (13) is connected with the adsorption tower (8).
4. The single tower dryer of claim 1, wherein: the adsorption tower further comprises a fifth temperature sensor (T5), an eleventh temperature sensor (T11) and a twelfth temperature sensor (T12), wherein the fifth temperature sensor (T5) is positioned at the outlet of the adsorption tower, and the eleventh temperature sensor (T11) and the twelfth temperature sensor (T12) are positioned in the adsorption tower.
5. The single tower dryer of claim 1, wherein: the device is characterized by further comprising an air inlet cooler (1), a pre-filter (9), a first pneumatic butterfly valve (A1), a second pneumatic butterfly valve (A2), a ninth pneumatic butterfly valve (A9), a tenth pneumatic butterfly valve (A10) and a dust removal filter (5), wherein the air inlet cooler (1) is connected with the pre-filter (9), the pre-filter (9) is connected with an adsorption tower (8) through the first pneumatic butterfly valve (A1), and the pre-filter (9) is connected with the adsorption tower (8) through the tenth pneumatic butterfly valve (A10); the dust removal filter (5) is connected with the adsorption tower (8) through a second pneumatic butterfly valve (A2), and the dust removal filter (5) is connected with the adsorption tower (8) through a ninth pneumatic butterfly valve (A9).
6. The single tower dryer of claim 1, wherein: the adsorption tower is connected with a pressure gauge (4), the adsorption tower is connected with an eighth pneumatic butterfly valve (A8), and the eighth pneumatic butterfly valve (A8) is connected with a silencer (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121444855.5U CN215939519U (en) | 2021-06-28 | 2021-06-28 | Single-tower dryer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121444855.5U CN215939519U (en) | 2021-06-28 | 2021-06-28 | Single-tower dryer |
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| CN215939519U true CN215939519U (en) | 2022-03-04 |
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| CN202121444855.5U Active CN215939519U (en) | 2021-06-28 | 2021-06-28 | Single-tower dryer |
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