CN116712742B - Industrial open type spray multistage drying system - Google Patents
Industrial open type spray multistage drying system Download PDFInfo
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- CN116712742B CN116712742B CN202311007416.1A CN202311007416A CN116712742B CN 116712742 B CN116712742 B CN 116712742B CN 202311007416 A CN202311007416 A CN 202311007416A CN 116712742 B CN116712742 B CN 116712742B
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- 238000001035 drying Methods 0.000 title claims abstract description 171
- 239000007921 spray Substances 0.000 title claims abstract description 39
- 230000003068 static effect Effects 0.000 claims abstract description 121
- 238000001179 sorption measurement Methods 0.000 claims abstract description 59
- 230000008929 regeneration Effects 0.000 claims abstract description 45
- 238000011069 regeneration method Methods 0.000 claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 41
- 239000000843 powder Substances 0.000 claims abstract description 36
- 238000007791 dehumidification Methods 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 238000005054 agglomeration Methods 0.000 claims description 13
- 230000002776 aggregation Effects 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000001694 spray drying Methods 0.000 abstract description 22
- 238000004519 manufacturing process Methods 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 22
- 238000005516 engineering process Methods 0.000 description 17
- 239000007789 gas Substances 0.000 description 14
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- 238000009833 condensation Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 6
- 238000010924 continuous production Methods 0.000 description 4
- 229940078795 lactoferrin Drugs 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- 235000013305 food Nutrition 0.000 description 3
- 238000004108 freeze drying Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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- 238000005265 energy consumption Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- CSSYQJWUGATIHM-IKGCZBKSSA-N l-phenylalanyl-l-lysyl-l-cysteinyl-l-arginyl-l-arginyl-l-tryptophyl-l-glutaminyl-l-tryptophyl-l-arginyl-l-methionyl-l-lysyl-l-lysyl-l-leucylglycyl-l-alanyl-l-prolyl-l-seryl-l-isoleucyl-l-threonyl-l-cysteinyl-l-valyl-l-arginyl-l-arginyl-l-alanyl-l-phenylal Chemical compound C([C@H](N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CS)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC=1C2=CC=CC=C2NC=1)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CC=1C2=CC=CC=C2NC=1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCSC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(C)C)C(=O)NCC(=O)N[C@@H](C)C(=O)N1CCC[C@H]1C(=O)N[C@@H](CO)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CS)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](C)C(=O)N[C@@H](CC=1C=CC=CC=1)C(O)=O)C1=CC=CC=C1 CSSYQJWUGATIHM-IKGCZBKSSA-N 0.000 description 2
- 235000021242 lactoferrin Nutrition 0.000 description 2
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- 239000002250 absorbent Substances 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
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- 102000018358 immunoglobulin Human genes 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000006041 probiotic Substances 0.000 description 1
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- 239000008247 solid mixture Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Provides an industrialized open type spray multistage drying system, which belongs to the technical field of separation drying. The drying system comprises a multi-stage air dehumidifying system and a multi-stage continuous drying system. The multi-section air dehumidifying system comprises a main air inlet fan, and an initial and medium-efficiency filter, a condensing rotary dehumidifier and a continuous regeneration adsorption tower which are sequentially arranged. The multistage continuous drying system comprises a drying tower, a first stage static bed, a second stage static bed, a pneumatic conveying device and a receiving powder box which are sequentially arranged and connected to the continuous regeneration adsorption tower. The drying air dehumidified by the multi-section air dehumidification system is supplied to the multi-section continuous drying system, and the material to be dried sequentially passes through the drying tower, the first section static bed, the second section static bed and the pneumatic conveying device to enter the material receiving powder box. The drying system is particularly suitable for low-temperature spray drying production, and can solve the problems of poor drying effect and low production efficiency of low-temperature spray drying production.
Description
Technical Field
The application relates to the technical field of separation and drying, and in particular relates to an industrial open type spray multistage drying system.
Background
Currently, the industrialized drying technology of active ingredients such as lactoferrin, immunoglobulin, probiotics, functional sugar and the like in the food industry mainly comprises traditional freeze drying technology, vacuum drying technology and the like. The drying technology can finish drying materials at a lower temperature, but only can carry out batch intermittent production, but cannot carry out continuous production, and has the problems of low production efficiency, high production cost (the energy consumption of a refrigeration and heating system in the drying process accounts for more than 80% of the total energy consumption), need of secondary crushing and the like. And by adopting a high-temperature spray drying technology, the material can stay for a long time in a high-temperature environment although continuous production can be realized. The structure of the product is damaged to a certain extent easily at high temperature, and the quality of the product is affected.
In view of the state of the art described above, low temperature spray drying techniques have evolved. The low-temperature spray drying technology combines the dual advantages of low-temperature drying and spray drying, can realize continuous production, and has high production efficiency by once drying into powder. The current low-temperature spray drying technology mainly comprises a spray freeze drying technology, an ionization spray drying technology, a vacuum spray drying technology, a spray liquid nitrogen congeal freeze drying technology and the like. However, the low-temperature drying technology method mainly stays in a laboratory research or small-batch production stage and is difficult to apply in a large scale in the food industry. Meanwhile, the food industry pursues that the drying equipment meets the requirements of large capacity, high efficiency, low cost and the like, but the related equipment of the existing low-temperature spray drying technology has huge one-time investment and high maintenance cost.
CN212651367U discloses a device of a low-temperature spray drying system with upper inlet and upper outlet, which changes the inlet air from wet air to dry air, and the dry air carries solvent to leave in the process of atomization drying, so as to reduce the evaporation amount of the solvent and realize low-temperature drying.
The device of the upper-inlet upper-outlet low-temperature spray drying system provided by the utility model is characterized in that the air for the drying system is dried, but the drying mode of the low-temperature spray drying system is single, and the drying effect and the production efficiency are difficult to meet the requirement of industrial mass production.
Disclosure of Invention
The present application has been made in view of the state of the art described above. The purpose of the application is to provide an industrial open type spray multistage drying system which is particularly applicable to (but not limited to) low-temperature spray drying, has high production efficiency and good drying effect.
The embodiment of the application provides an industrialization open spray multistage drying system, it includes multistage air dehumidification system and multistage continuous drying system, multistage air dehumidification system includes main air inlet fan to and the primary and secondary filter that sets gradually, condensation runner dehumidifier and continuous regeneration adsorption tower, multistage continuous drying system is including drying tower, the quiet bed of one section, the quiet bed of two sections, pneumatic conveying device and the receipts material powder case that set gradually, the drying tower the quiet bed of one section the quiet bed of two sections with pneumatic conveying device all is connected to continuous regeneration adsorption tower, through the dry air after the dehumidification of multistage air dehumidification system is supplied to multistage continuous drying system, the drying tower is including setting up in the spray gun on its upper portion, the spray gun is connected to the high-pressure pump, to spray into in the drying tower and treat the dry material through the drying tower in proper order the quiet bed of one section the quiet bed of two sections with pneumatic conveying device gets into receive the material powder case.
In at least one possible embodiment, the multistage continuous drying system further comprises a vacuum dryer connected between the pneumatic conveying means and the powder receiving bin.
In at least one possible embodiment, the continuous regeneration adsorption tower includes a high-speed venturi pipe disposed at an upper portion of the continuous regeneration adsorption tower, the high-speed venturi pipe being capable of taking out the hot water-containing air generated from the continuous regeneration adsorption tower.
In at least one possible embodiment, the high-speed venturi includes an adsorption tower gas outlet, a high-speed gas flow inlet, an inner cavity throat regulator, an adjustable throat, a throat regulator, and a release port, the inner cavity throat regulator being capable of regulating the opening size of the inner cavity throat, the throat regulator being capable of regulating the opening size of the adjustable throat, the high-speed gas flow inlet being connected to the main air intake fan by a pipe, the adsorption tower gas outlet being connected to an upper portion of the continuous regeneration adsorption tower so as to discharge moisture-containing air.
In at least one possible embodiment, a fresh air preheater, a main air inlet heat exchanger and a main air inlet high efficiency filter are arranged on a pipeline of the drying tower connected to the continuous regeneration adsorption tower so as to regulate the temperature and filter the main air inlet from the multi-stage air dehumidifying system, and the release port of the high-speed venturi tube is connected to the fresh air preheater so that the hot water-containing air generated by the continuous regeneration adsorption tower is led into the fresh air preheater so as to preheat the main air inlet flowing out of the continuous regeneration adsorption tower.
In at least one possible embodiment, the drying tower is further connected to an exhaust duct on which a main exhaust fan is provided, and to a first cyclone and/or a second cyclone, the upper part of which is provided with a fines agglomeration line, to which the first cyclone and/or the second cyclone are connected for re-feeding the material to be dried collected by the first cyclone and/or the second cyclone to the drying tower for agglomeration.
In at least one possible embodiment, the first stage static bed and the second stage static bed are disposed at the bottom of the drying tower, at least a portion of the second stage static bed extends along the periphery of the first stage static bed, the first stage static bed includes a first stage static bed air plate, and the second stage static bed includes a second stage static bed air plate.
In at least one possible embodiment, the pneumatic conveying means is a dense phase conveying means.
In at least one possible implementation mode, the temperature of main air inlet into the drying tower is 35-200 ℃, the air quantity of main air inlet is 1500-30000kg/h, the moisture content is 0.8-4g/kg, the temperature of gas discharged from the continuous regeneration adsorption tower is 60-120 ℃, the air quantity of air inlet of the first static bed is 400-7000kg/h, the moisture content is 0.8-4g/kg, the temperature is 25-65 ℃, the air quantity of air inlet of the second static bed is 400-7000kg/h, the moisture content is 0.8-4g/kg, the temperature is 25-35 ℃, and the temperature of material to be dried entering the drying tower is 25-75 ℃.
In at least one possible embodiment, the pressure of the high-pressure pump is 120-255bar.
The application provides an industrialization open spray multistage drying system is particularly useful for low temperature spray drying production mode, and it can promote drying effect through multistage drying technology.
Drawings
Fig. 1 is a schematic diagram of an industrial open spray multi-stage drying system according to one embodiment of the present application.
FIG. 2 is a schematic diagram of a multi-stage air dehumidification system in accordance with one embodiment of the present application.
Fig. 3 is a schematic structural view of a continuously regenerating adsorption tower according to an embodiment of the present application.
Fig. 4 is a schematic structural view of a high-velocity venturi according to one embodiment of the present application.
Fig. 5 is a schematic view of a drying tower, a first stage static bed, a second stage static bed, and the like of a multi-stage continuous drying system according to one embodiment of the present application.
Fig. 6 is a schematic structural view of a primary static bed, a secondary static bed, and a static bed damper thereof according to one embodiment of the present application.
Fig. 7 is a schematic view of the structure of a vacuum dryer and a powder receiving box of the multistage continuous drying system according to one embodiment of the present application.
Description of the reference numerals
100. Multistage air dehumidifying system
110. Middle-effect filter for junior middle-school
120. Condensing rotary dehumidifier
130. Main air intake fan
140. Continuous regeneration adsorption tower
141. High-speed venturi tube
1411. Gas outlet of adsorption tower
1412. High-speed airflow inlet
1413. Inner cavity throat
1414. Inner cavity throat regulator
1415. Adjustable laryngeal inlet
1416. Laryngeal regulator
1417. Release port
142. Heater
143. Spiral belt stirrer
144. Resin filter
145. Stirring motor
146. Resin storage bin
151. Main air inlet quantity regulating valve
152. Main air inlet bypass regulating valve
161. Venturi tube regulating valve
162. Air inlet flowmeter of adsorption tower
171. Main air inlet dew point instrument
172. Adsorption tower air outlet temperature sensor
181. Venturi tube wind dew point instrument
182. Venturi tube wind temperature sensor
200. Multistage continuous drying system
210. Drying tower
211. Spray gun
212. Fine powder agglomeration pipeline
220. Static bed
221. Static bed air plate
230. Two-stage static bed
231. Two-stage static bed air plate
240. Pneumatic conveying device
250. Vacuum drier
251. Control cabinet of vacuum dryer
252. Vacuum device
260. Material collecting powder box
271. Fresh air preheater
272. Main air inlet heat exchanger
273. Main air inlet high-efficiency filter
274. High-pressure pump
281. Static bed fan
282. Two-stage static bed fan
283. Pneumatic powder conveying fan
291. First cyclone separator
292. Second cyclone separator
Detailed Description
Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are merely illustrative of how one skilled in the art may practice the present application and are not intended to be exhaustive of all of the possible ways of practicing the present application nor to limit the scope of the present application.
The connection mentioned in the embodiments of the present application includes direct connection and indirect connection, connection through pipes, electrical connection, and other various connection modes.
Embodiments of the present application provide an industrial open spray multi-stage drying system (hereinafter sometimes simply referred to as "drying system") that includes a multi-stage air dehumidification system 100 and a multi-stage continuous drying system 200, as shown in fig. 1.
Specifically, as shown in fig. 2, the multi-stage air dehumidification system 100 may include a primary-medium efficiency filter 110, a condensing rotary dehumidifier 120, a main air intake fan 130, and a continuous regeneration adsorption tower 140. The primary and medium-efficiency filter 110, the condensation rotary dehumidifier 120, the main air inlet fan 130 and the continuous regeneration adsorption tower 140 can be connected through pipelines. Under the action of the main air intake fan 130, air (main air intake) can sequentially pass through the primary-medium-efficiency filter 110, the condensation rotary dehumidifier 120 and the continuous regeneration adsorption tower 140 so as to fully dry the air.
It will be appreciated that the condensing rotary dehumidifier 120 may be replaced by a separate condenser and rotary dehumidifier.
Preferably, as shown in fig. 3, the continuous regeneration adsorption tower 140 may include a high-speed venturi 141, a heater 142, a ribbon blender 143, a resin filter 144, a blending motor 145, a resin storage bin 146, and a dry air outlet. A (venturi, also known as venturi) stirring motor 145 may be connected to ribbon blender 143 to drive ribbon blender 143 into operation. A high-speed venturi 141 may be provided at an upper portion of the continuous regeneration adsorption tower 140 so that hot air containing water passes therethrough.
The water-absorbent resin particles in the resin filter 144 can continuously absorb moisture in the air (main intake air), and then rise and turn under the action of the ribbon blender 143 to be heated by the heater 142 so that the moisture absorbed in the resin is evaporated, and the hot air containing water brings heat out of the fresh air preheater 271 (see fig. 5) of the multi-stage continuous drying system 200 through the high-speed venturi 141 to preheat the fresh air (main intake air). Experiments show that compared with the traditional technology that heat is not recovered and the fresh air preheater is additionally heated by steam, the scheme can reduce the steam consumption by 18.2-30.5%.
Preferably, as shown in FIG. 4, the high velocity venturi 141 may include an adsorber gas outlet 1411, a high velocity gas stream inlet 1412, a lumen throat 1413, a lumen throat regulator 1414, an adjustable throat 1415, a throat regulator 1416, and a discharge port 1417. The adsorption column gas outlet 1411 may be connected to an upper portion of the continuous regeneration adsorption column 140. The high-speed air flow inlet 1412 may be connected to the main air intake fan 130 through a duct to introduce the high-speed air flow to the high-speed venturi 141. The lumen throat adjuster 1414 and the laryngeal inlet adjuster 1416 may be used to adjust the opening sizes of the lumen throat 1413 and the adjustable laryngeal inlet 1415, respectively.
Preferably, as shown in fig. 2, a main air inlet quantity adjusting valve 151 is also arranged between the primary and secondary filter 110 and the condensation rotary dehumidifier 120, and is used for controlling the air inlet quantity of the system. The conduit of the high-speed air flow inlet 1412 to the main air intake 130 may be provided with a venturi adjustment valve 161 to control the amount of air flow to the high-speed venturi 141. The piping of the primary air intake fan 130 connecting the continuous regeneration adsorption tower 140 may be provided with an adsorption tower air intake meter 162 to calculate the primary air intake to the continuous regeneration adsorption tower 140.
Preferably, as shown in fig. 2, a main inlet air dew point meter 171 and an adsorption tower outlet air temperature sensor 172 can be respectively arranged on a pipeline of the continuous regeneration adsorption tower 140 connected to the multi-stage continuous drying system 200 so as to monitor the moisture content and the temperature of main inlet air.
Preferably, as shown in fig. 2, a venturi wind dew point meter 181 and a venturi wind temperature sensor 182 may be respectively provided to the pipes of the high-speed venturi 141 connected to the multistage continuous drying system 200 to monitor the moisture content and temperature of the hot air containing water discharged from the continuous regeneration adsorption tower 140 through the high-speed venturi 141.
Note that: dew point (Dew point), also known as Dew point temperature, refers to the temperature to which gaseous water contained in a gas needs to be reduced below a fixed gas pressure to saturate and condense into liquid water.
It will be appreciated that the skilled artisan can choose to turn on or off the continuous regeneration adsorption column 140 depending on the different drying temperatures and air moisture requirements.
It will be appreciated that the drying system provided by the present embodiment is particularly suitable for, but not limited to, use with low temperature spray drying techniques, which may also be used with high temperature spray drying. Optionally, in the drying system provided in this embodiment, during high-temperature spray drying production, as shown in fig. 2, the multi-stage air dehumidifying system 100 may be provided with a main air intake bypass and a main air intake bypass regulating valve 152, so as to connect the primary-medium-efficiency filter 110 to the multi-stage continuous drying system 200 through the main air intake bypass. The main inlet air quantity regulating valve 151 is closed, and the main inlet air bypass regulating valve 152 is opened, so that the main inlet air passes over the condensing rotary dehumidifier 120 and the continuous regeneration adsorption tower 140 and directly enters the multi-stage continuous drying system 200 (particularly a fresh air preheater 271 of the multi-stage continuous drying system, which is mentioned below).
Further, as shown in fig. 5 and 7, the multi-stage continuous drying system 200 may include a drying tower 210, a first stage stationary bed 220, a second stage stationary bed 230, a pneumatic conveying device 240, a vacuum dryer 250, and a powder receiving tank 260.
Specifically, as shown in fig. 5, the drying tower 210 may be connected by piping to the multi-stage air dehumidification system 100 (particularly the drying air outlet of the continuous regeneration adsorption tower 140), an upstream feed system. The drying tower 210 may be connected to the pipes of the multi-stage air dehumidifying system 100 and may be sequentially provided with a fresh air preheater 271, a main air intake heat exchanger 272, and a main air intake high efficiency filter 273 to temperature-regulate and filter the main air intake (fresh air) from the multi-stage air dehumidifying system 100.
It will be appreciated that the temperature of the primary inlet air may be adjusted by injecting hot or ice water into the primary inlet air heat exchanger 272.
Preferably, a main intake air meter and a main intake air temperature sensor are provided on a pipe of the drying tower 210 connected to the multi-stage air dehumidifying system 100 to monitor the volume and temperature of the main intake air.
The drying tower 210 may also be connected to an exhaust duct, which may be provided with a main exhaust fan for exhausting air (main intake) introduced into the drying tower 210. Preferably, the main exhaust air meter and the main exhaust air temperature sensor can be arranged on the exhaust pipeline to monitor the air quantity and the temperature of the main exhaust air.
The drying column 210 may be provided with a high pressure pump 274 connected to the piping of the feed system. Preferably, the drying tower 210 is connected to the piping of the feed system and a material temperature sensor may be provided to monitor the material temperature and a material flow gate valve may be provided to regulate the feed flow.
The upper portion of the drying tower 210 may be provided with a spray gun 211, a fine powder agglomeration line 212. The upper portion of the drying tower 210 is also connected to a first cyclone 291. Preferably, the drying tower 210 may also be connected to a second cyclone 292. It will be appreciated that. The number of cyclones can be set according to the production requirements.
The fines agglomeration line 212 may be connected to a first cyclone 291. The material to be dried may be passed through a filter into the spray gun 211 by a feed balance bar of a feed system under the influence of a high pressure pump 274. The material is rapidly atomized to form particles of material after entering the drying tower through the spray gun 211.
The size of the particles formed after atomization of the material may not be uniform. Wherein, the large particles can fall to the bottom of the drying tower 210 and can sequentially pass through the first-stage static bed 220, the second-stage static bed 230 and the pneumatic conveying device 240. The final large particles are fed into the vacuum dryer 250 by the pneumatic powder feeder 283 and the final finished product may enter the powder receiving bin 260. And small particles (i.e. fine powder) formed by atomizing part of the materials are discharged from the top of the drying tower under the action of the main exhaust fan and respectively enter the first cyclone 291 and the second cyclone 292. Cyclone separators can utilize centrifugal forces generated by a gas-solid mixture rotating at high speeds to separate small particulate (fines) material from a gas stream. Most of the fines can be returned to the drying tower 210 via fines agglomeration line 212 for secondary agglomeration with the material sprayed from the spray gun 211 to form large particles that can fall into the first static bed 220.
Alternatively, the spray gun 211 may be replaced with a two fluid nozzle or rotary atomizer to connect the fines agglomeration line directly to the pneumatic conveying means 240 when the particles required to produce the product are small.
Static fluidized bed dryers are often referred to in the art of drying simply as "static beds", so that "static bed" in this application refers to a static fluidized bed dryer. A first stage stationary bed 220 and a second stage stationary bed 230 may be disposed at the bottom of the drying column 210. It will be appreciated that the first stage of static bed 220 and the second stage of static bed 230 may be two independent static fluidized bed dryers disposed in series, may be a first layer and a second layer of static fluidized bed dryer having a multi-layer structure, and may be a first chamber and a second chamber of static fluidized bed dryer having a multi-chamber structure.
The first stage of static bed 220 and the second stage of static bed 230 may be disposed at the bottom of the drying tower 210, and the material falling into the bottom of the drying tower 210 may be processed by the first stage of static bed 220 and then continuously enter the second stage of static bed 230 for drying under the action of wind pressure.
Preferably, as shown in fig. 5 and 6, the lower part of the first stage stationary bed 220 may be connected to the second stage stationary bed 230. At least a portion of the two-stage static bed 230 may extend along the periphery of the one-stage static bed 220. The first stage of static bed 220 may include a first stage of static bed damper 221 and the second stage of static bed 230 may include a second stage of static bed damper 231.
The first stage stationary bed 220 and the second stage stationary bed 230 may be connected to the multi-stage air dehumidifying system 100 (particularly, the dry air outlet of the continuous regeneration adsorption tower 140) by pipes, respectively. The pipeline of the multi-section air dehumidifying system 100 connected to the one-section static bed 220 can be sequentially provided with a one-section static bed air inlet volume adjusting valve, a one-section static bed fan 281, a one-section static bed air inlet electric heater and a one-section static bed air inlet high-efficiency filter. The two-stage static bed 230 is connected to the pipeline of the multi-stage air dehumidifying system 100, and can be sequentially provided with a two-stage static bed air inlet volume regulating valve, a two-stage static bed fan 282, a two-stage static bed air inlet electric heater and a two-stage static bed air inlet high-efficiency filter. Is used for respectively carrying out air quantity adjustment, heating and filtration on the dry inlet air (air) used by the static bed. The adjusted, heated and filtered dry air inlet can respectively pass through the first section of static bed air plate 221 and the second section of static bed air plate 231 to enter the first section of static bed 220 and the second section of static bed 230.
Preferably, the first stage static bed 220 and the second stage static bed 230 are connected to the pipes of the multi-stage air dehumidifying system 100, and may further be provided with a first stage static bed air inlet meter, a first stage static bed air inlet temperature sensor, a second stage static bed air inlet meter, and a second stage static bed air inlet temperature sensor, respectively, for monitoring the air volume and the temperature of the first stage static bed 220 air inlet and the second stage static bed 230 air inlet.
Pneumatic conveying means 240 may be a dense phase conveying tank (a process in which dense phase conveying employs gas flow to convey solid powdery material, referred to as dense phase conveying if the density of the particle stream in the pipeline is close to the bed density in the critical fluidization regime). Pneumatic conveying means 240 may be connected to the second stage stationary bed 230 to convey the material dried by the drying tower 210, the first stage stationary bed 220, and the second stage stationary bed 230 to the vacuum dryer 250 for vacuum drying. It will be appreciated that the air used by the pneumatic conveying apparatus 240 (and in particular the dense phase conveying apparatus) is dehumidified dry air, and the process of transporting the material using the dry air-tight phase can also function as a dry material.
The pneumatic conveying means 240 may be connected to the multi-stage air dehumidifying system 100 (particularly, the dry air outlet of the continuously regenerating adsorption tower 140) by a pipe. The pneumatic conveying device 240 is connected to the pipeline of the multi-stage air dehumidifying system 100, and may be provided with a pneumatic powder conveying line air quantity regulating valve, a pneumatic powder conveying fan 283 and a pneumatic powder conveying line high-efficiency filter for regulating and filtering the air quantity of the used dry air inlet (air).
Preferably, the pneumatic conveying device 240 is connected to the pipeline of the multi-stage air dehumidifying system 100, and a pneumatic powder conveying line air meter and a pneumatic powder conveying line temperature sensor can be further arranged for monitoring the air volume and temperature of the pneumatic conveying device 240.
Preferably, the first stage static bed fan 281, the second stage static bed fan 282 and the pneumatic powder conveying fan 283 can be Roots fans.
The vacuum dryer 250 may further include a vacuum dryer control cabinet 251, a vacuum device 252 for controlling the vacuum dryer 250 and creating vacuum conditions, respectively.
It will be appreciated that different multi-stage drying combinations may be selected, such as three-stage drying combinations of the drying tower 210, the first stage static bed 220, the second stage static bed 230, three-stage drying combinations of the drying tower 210, the first stage static bed 220, and the vacuum dryer 250, and four-stage drying combinations of the drying tower 210, the first stage static bed 220, the second stage static bed 230, and the pneumatic conveying device 240, for example, according to the moisture content requirements of different products.
An exemplary method of manufacturing a drying system provided in accordance with embodiments of the present application is described below.
When the drying system is started, the main air inlet bypass regulating valve 152 is closed, the main air inlet air quantity regulating valve 151 is opened, and air sequentially passes through the primary-medium-efficiency filter 110, the condensation rotary dehumidifier 120 and the continuous regeneration adsorption tower 140 under the action of the main air inlet fan 130. Wherein, the spiral band stirrer 143 of the continuous regeneration adsorption tower 140 may have a rotation speed of 10-120r/min (revolutions per minute). The main inlet air volume, moisture content and temperature are monitored by an adsorption tower inlet air volume meter 162, a main inlet air dew point meter 171 and an adsorption tower outlet air temperature sensor 172. Wherein the main air inlet air volume can be 1500-30000kg/h (kg/h), and the moisture content can be 0.8-4g/kg (g/kg).
The moisture content and the temperature of the moisture-containing air discharged from the continuous regeneration adsorption tower 140 can be monitored by a venturi wind dew point meter 181 and a venturi wind temperature sensor 182, and the air quantity, the moisture content and the temperature can be adjusted by adjusting a main air inlet air quantity adjusting valve 151, a venturi tube adjusting valve 161, a condensation rotary dehumidifier 120, a heater 142 and a spiral belt stirrer 143. Wherein the temperature of the gas discharged from the continuous regeneration adsorption tower 140 may be 60-120 deg.c.
The primary air intake can be preheated by a fresh air preheater 271, then sequentially enters the drying tower 210 through a primary air intake heat exchanger 272 and a primary air intake high-efficiency filter 273, and the primary air intake temperature can be 35-200 ℃.
The air quantity regulating valve of the first section of static bed air intake is opened, and the dry air from the multi-section air dehumidifying system 100 can sequentially pass through the first section of static bed air intake electric heater and the first section of static bed air intake high-efficiency filter to pass through the first section of static bed air plate 221 and enter the first section of static bed 220 under the action of the first section of static bed fan 281. The air inlet volume of the static bed 220 at one stage can be 400-7000kg/h, the moisture content can be 0.8-4g/kg, and the temperature can be 25-65 ℃.
The two-section static bed air inlet air quantity regulating valve is opened, and the dry air from the multi-section air dehumidifying system 100 can sequentially pass through the two-section static bed air inlet electric heater and the two-section static bed air inlet high-efficiency filter to enter the two-section static bed 230 through the two-section static bed air plate 231 under the action of the two-section static bed fan 282, wherein the air inlet air quantity of the two-section static bed 230 can be 400-7000kg/h, the moisture content can be 0.8-4g/kg, and the temperature can be 25-35 ℃.
And opening a pneumatic powder conveying line air quantity regulating valve, and enabling powder conveying dry air to enter the pneumatic conveying device 240 through a pneumatic powder conveying line high-efficiency filter under the action of a pneumatic powder conveying fan 283.
The main air inlet, the first-stage static bed air inlet, the second-stage static bed air inlet, the pneumatic powder conveying line and the pneumatic powder conveying line can be monitored by the main air inlet meter, the main air inlet temperature sensor, the first-stage static bed air inlet temperature sensor, the second-stage static bed air inlet meter and the second-stage static bed air inlet temperature sensor respectively.
The material is sprayed into the drying tower 210 through the spray gun 211 under the action of the high-pressure pump 274 to be atomized rapidly. Wherein the temperature of the material may be 25-75 c and the pressure of the high pressure pump 274 may be 120-255bar.
The temperature of the material can be monitored through a material temperature sensor, and the feeding flow rate can be regulated through a material flow gate valve. Large particles of the material can fall to the bottom of the drying tower 210, sequentially pass through the first section of static bed 220, the second section of static bed 230 and the pneumatic conveying device 240, are conveyed into the vacuum dryer 250 under the action of the pneumatic powder conveying fan 283, and finally the finished product enters the powder receiving box 260.
The small particles of the materials can be discharged from the top of the drying tower 210 under the action of the main exhaust fan and respectively enter the first cyclone 291 and the second cyclone 292. Most small particles can be returned to the drying tower through the fine powder agglomeration pipeline 212 to be agglomerated with the material sprayed by the spray gun 211 for the second time to form large particles, and then the large particles enter a section of static bed.
The main exhaust air quantity and the main exhaust air temperature sensor can be used for monitoring the exhaust air quantity and the exhaust air temperature. Wherein the main exhaust temperature can be 25-95 ℃.
The drying system provided in this embodiment sufficiently dries the air used, and simultaneously fully ensures the drying effect of the drying system by five drying steps (drying tower spray drying, first-stage static bed drying, second-stage static bed drying, pneumatic conveying drying, and vacuum drying). The drying system has good process adaptability and strong adjustability, for example, the moisture content of main inlet air of a drying tower of the system can be reduced to less than or equal to 1g/kg (g/kg), the inlet air temperature of the drying tower is 35-200 ℃, the exhaust air temperature is 25-95 ℃, the moisture content of a final product is 0.8-10.2%, and the drying under the room temperature condition can be realized at the lowest, and the moisture content is less than or equal to 3%. The particle diameter D50 value of the product can be adjusted within the range of 10-90um (the D50 means the particle diameter corresponding to the cumulative particle size distribution percentage of one sample reaching 50%) by adjusting the cyclone sheet, the plate hole and the fine powder agglomeration mode of the spray gun of the drying tower, and the particle consistency is less than or equal to 0.6.
Three examples of specific production processes using the drying system provided in the above embodiment are given below.
First embodiment
The drying system and the process method are specifically selected by the embodiment.
1. The rotation speed of the spiral belt stirrer is 60r/min (revolutions per minute), the main air inlet quantity is 1500kg/h (kilograms per hour), and the moisture content is 0.8g/kg (grams per kilogram).
2. The temperature of the discharged air of the continuous regeneration adsorption tower is 60 ℃.
3. The main air inlet temperature of the drying tower is 35 ℃ and the air exhaust temperature is 25 ℃.
4. The inlet air quantity of the first section of static bed is 400kg/h, the moisture content is 0.8g/kg, and the temperature is 25 ℃.
5. The inlet air quantity of the two-stage static bed is 400kg/h, the moisture content is 0.8g/kg, and the temperature is 25 ℃.
6. The temperature of the material entering the drying column was 25℃and the high-pressure pump pressure was 120 bar.
Second embodiment
The drying system and the process method are provided by utilizing the previous embodiment, and specific selection is made:
1. the rotation speed of the spiral belt stirrer is 120r/min (revolutions per minute), the main air inlet quantity is 30000kg/h (kilograms per hour), and the moisture content is 1g/kg (grams per kilogram).
2. The temperature of the discharged air of the continuous regeneration adsorption tower is 120 ℃.
3. The main air inlet temperature of the drying tower is 85 ℃ and the air exhaust temperature is 50 ℃.
4. The inlet air quantity of the static bed is 7000kg/h, the moisture content is 1g/kg, and the temperature is 35 ℃.
5. The inlet air quantity of the two-stage static bed is 7000kg/h, the moisture content is 1g/kg, and the temperature is 25 ℃.
6. The temperature of the material entering the drying column was 55℃and the high-pressure pump pressure was 255bar.
Third embodiment
The drying system and the process method are provided by utilizing the previous embodiment, and specific selection is made:
1. the rotation speed of the spiral belt stirrer is 10r/min (revolutions per minute), the main air inlet quantity is 1500kg/h (kilograms per hour), and the moisture content is 2g/kg (grams per kilogram).
2. The temperature of the discharged air of the continuous regeneration adsorption tower is 120 ℃.
3. The main air inlet temperature of the drying tower is 75 ℃, and the air exhaust temperature is 40 ℃.
4. The inlet air quantity of the first section of static bed is 400kg/h, the moisture content is 2g/kg, and the temperature is 35 ℃.
5. The inlet air quantity of the second-stage static bed is 400kg/h, the moisture content is 2g/kg, and the temperature is 25 ℃.
6. The temperature of the material entering the drying column was 55℃and the high-pressure pump pressure was 120 bar.
It is to be understood that numerical ranges in this application include the endpoints and any points between the endpoints.
It is to be understood that the implementations, embodiments, examples, etc. of the present application, as well as portions of aspects or features thereof, may be appropriately combined.
The following shows the results of assays for producing heat sensitive protein-lactoferrin using the above embodiments and examples to demonstrate some of the advantages of the present application in providing an industrial open spray multistage drying system.
Table 1: lactoferrin detection results produced by the first to third examples
Note that: d50 means the particle size corresponding to a cumulative particle size distribution percentage of one sample reaching 50%.
From the test results shown in table 1, it is clear that the heat-sensitive protein-lactoferrin product produced by the present embodiment and example has a low water content and good particle uniformity.
Some of the advantageous effects of the above-described embodiments of the present application are briefly described below.
(1) The embodiment of the application provides an industrialized open type spray multistage drying system which comprises a multistage air dehumidifying system (a condensing rotary dehumidifier and a continuous regeneration adsorption tower) and multistage continuous drying technology (spray drying of a drying tower, drying of a first-stage static bed, drying of a second-stage static bed, pneumatic conveying drying and vacuum drying), and is particularly suitable for a low-temperature spray drying production mode. The system has good drying effect and better process adaptability. The main production process conditions such as the main inlet air moisture content, the inlet air temperature range of the drying tower, the exhaust air temperature range, the moisture content of the final product, the particle size D50 value and the like are wide in adjustment range, and the production process requirements of various products can be met.
(2) According to the industrialized open type spray multistage drying system provided by the embodiment of the application, under the conditions of equal air inlet temperature, air exhaust temperature, production capacity and the like, the drying effect is jointly improved through the multistage drying technology, and compared with a traditional high-temperature spray drying system relying on a higher drying tower, the main body height of the drying tower can be reduced to 40% -60% of the main body height of the prior art. The equipment cost can be reduced, and the occupied space is saved. The proposal can also reduce the steam consumption by 18.2 to 30.5 percent, and has obvious energy saving and consumption reducing effects.
(3) The embodiment of the application provides an industrialization open spray multistage drying system adopts open design, and the drying tower is exhausted air and is no longer retrieved promptly, compares in closed system, and its main air inlet moisture content is lower more stable, and drying efficiency is higher, can realize continuous production.
It is to be understood that in the present application, when the number of parts or members is not particularly limited, the number may be one or more, and the number herein refers to two or more. For the case where the number of parts or members is shown in the drawings and/or described in the specification as a specific number such as two, three, four, etc., the specific number is generally illustrative and not restrictive, it may be understood that a plurality, i.e., two or more, but this does not mean that the present application excludes one.
It should be understood that the above embodiments are merely exemplary and are not intended to limit the present application. Those skilled in the art can make various modifications and changes to the above-described embodiments without departing from the scope of the present application.
Claims (9)
1. An industrialized open type spray multistage drying system is characterized by comprising a multistage air dehumidifying system (100) and a multistage continuous drying system (200),
the multi-section air dehumidifying system (100) comprises a main air inlet fan (130), and a primary and middle-effect filter (110), a condensing rotary dehumidifier (120) and a continuous regeneration adsorption tower (140) which are sequentially arranged,
the multistage continuous drying system (200) comprises a drying tower (210), a first stage static bed (220), a second stage static bed (230), a pneumatic conveying device (240) and a powder receiving box (260) which are sequentially arranged, wherein the drying tower (210), the first stage static bed (220), the second stage static bed (230) and the pneumatic conveying device (240) are connected to the continuous regeneration adsorption tower (140),
the continuous regeneration adsorption tower (140) comprises a high-speed venturi tube (141), a heater (142), a spiral belt stirrer (143) and a resin filter (144), wherein the high-speed venturi tube (141) is arranged at the upper part of the continuous regeneration adsorption tower (140), resin in the resin filter (144) can absorb moisture in air, the spiral belt stirrer (143) can stir the resin to enable the moisture absorbed by the resin to be evaporated by the heater (142), the high-speed venturi tube (141) can carry out hot water-containing air generated by the continuous regeneration adsorption tower (140),
the high-speed venturi (141) includes an adsorption tower gas outlet (1411) and a high-speed gas flow inlet (1412), the adsorption tower gas outlet (1411) is connected to an upper portion of the continuous regeneration adsorption tower (140) so as to discharge the moisture-containing air, the high-speed gas flow inlet (1412) is connected to the main air intake fan (130) through a pipe,
the drying air dehumidified by the multi-stage air dehumidifying system (100) is supplied to the multi-stage continuous drying system (200),
the drying tower (210) comprises a spray gun (211) arranged at the upper part of the drying tower, the spray gun (211) is connected with a high-pressure pump (274) to spray materials to be dried into the drying tower (210),
the material to be dried sequentially passes through the drying tower (210), the first section of static bed (220), the second section of static bed (230) and the pneumatic conveying device (240) to enter the material collecting powder box (260).
2. The industrial open spray multi-stage drying system of claim 1, wherein the multi-stage continuous drying system (200) further comprises a vacuum dryer (250),
the vacuum dryer (250) is connected between the pneumatic conveying device (240) and the powder receiving box (260).
3. The industrialized open spray multi-stage drying system of claim 1, wherein the high-velocity venturi (141) comprises a lumen throat (1413), a lumen throat regulator (1414), an adjustable throat (1415), a throat regulator (1416), and a discharge port (1417),
the cavity throat adjuster (1414) can adjust the opening size of the cavity throat (1413),
the laryngeal regulator (1416) is capable of regulating the opening size of the adjustable laryngeal opening (1415).
4. The industrialized open spray multi-stage drying system according to claim 3, wherein the drying tower (210) is connected to the continuous regeneration adsorption tower (140) and is provided with a fresh air preheater (271), a main air inlet heat exchanger (272) and a main air inlet high efficiency filter (273) for temperature adjustment and filtration of the main air inlet from the multi-stage air dehumidification system (100),
the release port (1417) of the high-speed venturi tube (141) is connected to the fresh air preheater (271) so that the hot water-containing air generated by the continuous regeneration adsorption tower (140) is led into the fresh air preheater (271) to preheat the main inlet air flowing out of the continuous regeneration adsorption tower (140).
5. The industrial open spray multistage drying system according to claim 1, characterized in that the drying tower (210) is also connected to an exhaust duct, on which a main exhaust fan is arranged, and a first cyclone (291) and/or a second cyclone (292),
the upper part of the drying tower (210) is provided with a fine powder agglomeration line (212), and the first cyclone (291) and/or the second cyclone (292) are connected to the fine powder agglomeration line (212) to re-throw the material to be dried collected by the first cyclone (291) and/or the second cyclone (292) into the drying tower (210) for agglomeration.
6. The industrialized open spray multi-stage drying system according to claim 1, wherein the first stage stationary bed (220) and the second stage stationary bed (230) are disposed at the bottom of the drying tower (210), at least a portion of the second stage stationary bed (230) extends along the periphery of the first stage stationary bed (220),
the section of static bed (220) comprises a section of static bed air plate (221),
the two-stage static bed (230) comprises two-stage static bed air plates (231).
7. The industrial open spray multi-stage drying system of claim 1, wherein the pneumatic conveying means (240) is a dense phase conveying means.
8. The industrialized open spray multistage drying system according to claim 1, wherein the temperature of the main inlet air into the drying tower (210) is 35-200deg.C, the volume of the main inlet air is 1500-30000kg/h, the moisture content is 0.8-4g/kg,
the temperature of the gas discharged from the continuous regeneration adsorption tower (140) is 60-120 ℃,
the air inlet quantity of the first section static bed (220) is 400-7000kg/h, the moisture content is 0.8-4g/kg, the temperature is 25-65 ℃,
the air inlet quantity of the two-stage static bed (230) is 400-7000kg/h, the moisture content is 0.8-4g/kg, the temperature is 25-35 ℃,
the temperature of the material to be dried entering the drying tower (210) is 25-75 ℃.
9. The industrial open spray multi-stage drying system of claim 1, wherein the high pressure pump (274) has a pressure of 120-255bar.
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| CN203944264U (en) * | 2014-07-12 | 2014-11-19 | 苏州克利亚环保科技有限公司 | The adjustable venturi eddy flow of integral type exhaust gas washing tower |
| CN104503501A (en) * | 2014-11-27 | 2015-04-08 | 国家电网公司 | Energy-saving environmental-friendly electrical equipment box dehumidifying apparatus |
| CN205235429U (en) * | 2015-11-18 | 2016-05-18 | 北京中轻机乳品设备有限责任公司 | Spray drying tower of airing exhaust on vertical |
| CN207101928U (en) * | 2017-07-07 | 2018-03-16 | 山东昆达生物科技有限公司 | A kind of spray drying system |
| CN109099647A (en) * | 2018-08-23 | 2018-12-28 | 埃洛普(广东)空调科技有限公司 | Drying room |
| CN209706241U (en) * | 2018-12-18 | 2019-11-29 | 天津市天兴佳业科技有限公司 | Dehumidifier |
| CN209995255U (en) * | 2019-01-17 | 2020-01-31 | 无锡市现代喷雾干燥设备有限公司 | high-efficient spray drying device is used in milk powder processing |
| CN209885487U (en) * | 2019-02-01 | 2020-01-03 | 毛丁 | Venturi scrubbing tower |
| CN210145519U (en) * | 2019-05-20 | 2020-03-17 | 长沙兴嘉生物工程股份有限公司 | Drying device of organic micronutrient replenisher |
| CN211357781U (en) * | 2019-11-22 | 2020-08-28 | 张千 | Energy-saving pressure spray drying tower |
| CN213590828U (en) * | 2020-09-11 | 2021-07-02 | 铜陵市菲力克测控技术有限公司 | Venturi ejector with adjustable nozzle |
| CN216409629U (en) * | 2021-12-07 | 2022-04-29 | 甘肃聚能环保科技有限公司 | Plastic raw material drying device |
| CN216497509U (en) * | 2021-12-13 | 2022-05-13 | 黑龙江省绿色食品科学研究院 | Low-temperature spray drying system |
| CN114766165A (en) * | 2022-04-01 | 2022-07-22 | 郑州大学 | Venturi tube |
| CN219333655U (en) * | 2023-02-22 | 2023-07-14 | 沧州天泽环保科技有限公司 | Flue gas pretreatment ware |
| CN116422113A (en) * | 2023-05-08 | 2023-07-14 | 上海交通大学 | Temperature and pressure swing adsorption dry air production system and operation method thereof |
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