CN115540575B - Salicylic acid flash evaporation drying system - Google Patents
Salicylic acid flash evaporation drying system Download PDFInfo
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- CN115540575B CN115540575B CN202211134815.XA CN202211134815A CN115540575B CN 115540575 B CN115540575 B CN 115540575B CN 202211134815 A CN202211134815 A CN 202211134815A CN 115540575 B CN115540575 B CN 115540575B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/003—Supply-air or gas filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/001—Heating arrangements using waste heat
- F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
- F26B23/005—Heating arrangements using waste heat recovered from dryer exhaust gases using a closed cycle heat pump system ; using a heat pipe system
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- 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
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a salicylic acid flash evaporation drying system, which relates to the technical field of salicylic acid drying, solves the technical problems that an original flash evaporation mode can cause energy loss, and can not recycle gas, so that the energy consumed by the whole system is saved, a high-temperature heat pump unit and a heat pump evaporator are used for cooling and dehydrating part of wet air after dust removal, a heat pump condenser is used for heating dehydrated dry air, and the heated dry air is pressurized by a circulating fan to be heated to about 130 ℃ and is conveyed to an inlet of a dryer; the heat pump evaporator, the high-temperature heat pump unit, the heat pump condenser and the circulating booster fan form a group of energy recycling components, the generated gas is recycled, a better energy-saving effect is achieved in the flash evaporation process, meanwhile, the circulating booster fan adopts different-degree boosting modes to the input gas according to the volume of the input gas, different guiding factors are adopted for boosting, and the boosting effect is improved.
Description
Technical Field
The invention belongs to the technical field of salicylic acid drying, and particularly relates to a salicylic acid flash evaporation drying system.
Background
Salicylic acid is a fat-soluble organic acid, and has chemical formula of C 7 H 6 O 3 . The appearance is white crystal powder, and the melting point is 158-161 ℃. The Chinese medicinal composition is an important fine chemical raw material in the natural willow bark, white pearl tree leaves and sweet birch, and can be used for preparing medicaments such as aspirin and the like.
In the flash evaporation drying treatment process of salicylic acid, the original system air is powered by a blower after being filtered, is heated to a temperature ranging from 108 ℃ to 158 ℃ by a steam heating device, enters a bottom inlet of a drying tower, is cooled by the drying tower, is cooled to a temperature ranging from 60 ℃ to 70 ℃ after cyclone separation and cloth bag dust removal, is sucked out by a draught fan and conveyed to a tail gas environment-friendly treatment device, and is discharged into the atmosphere after environment-friendly treatment;
in the specific flash drying process, a large amount of gas with temperature is discharged, but the gas with temperature can be reused, so that the original flash drying mode can cause energy loss, and the gas can not be recycled, thereby saving the energy consumed by the whole system.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art; therefore, the invention provides a salicylic acid flash evaporation drying system which is used for solving the technical problems that an original flash evaporation mode can cause energy loss and gas cannot be recycled, so that the energy consumed by the whole system is saved.
To achieve the above objective, an embodiment according to a first aspect of the present invention provides a salicylic acid flash drying system, including a flash dryer, a raw steam heater, a pressure equalizing box, a circulating booster fan, a heat pump evaporator, a heat pump condenser, a high-temperature heat pump unit, a cyclone separator, a bag-type dust remover, an induced draft fan and an exhaust gas environmental protection device;
the high-temperature heat pump unit and the heat pump evaporator are used for cooling and dehydrating part of the wet air after dust removal, the heat pump condenser is used for heating the dehydrated dry air, and the heated dry air is pressurized and heated to about 130 ℃ by the circulating fan and is conveyed to the inlet of the dryer;
the circulating booster fan is used for transmitting heated gas into the pressure equalizing box, the pressure equalizing box is used for carrying out capacity expansion and pressure reduction equalization on the heated gas and transmitting the gas subjected to pressure equalizing into the raw steam heater, the raw steam heater adopts a steel-aluminum composite finned tube as a main heat exchanger element, heat in steam is transmitted into the flash evaporation dryer, and salicylic acid in the flash evaporation dryer is subjected to flash evaporation drying treatment;
the flash dryer transmits gas generated in the flash drying process into a cyclone separator, the cyclone separator separates particles in the gas, and solid particles or liquid drops with larger inertial centrifugal force are thrown to the outer wall surface to be separated by rotary motion caused by tangential introduction of air flow;
the cyclone separator transmits the treated gas into the bag-type dust remover again, the bag-type dust remover adsorbs dust particles in the gas, and the treated gas is transmitted into corresponding storage equipment.
Preferably, the gas in the storage equipment is respectively conveyed into the induced draft fan and the heat pump evaporator, wherein an adjusting valve is arranged in the conveying pipeline, the input specific parameters are controlled and adjusted by an operator to the adjusting valve, the induced draft fan conveys the received gas into the tail gas environment-friendly device, and the tail gas environment-friendly device purifies the gas in the conveying process.
Preferably, the heat pump evaporator, the high-temperature heat pump unit, the heat pump condenser and the circulating booster fan form a group of energy recycling components, wherein the high-temperature heat pump unit and the heat pump evaporator are used for cooling part of wet air after dust removal to 20 ℃ for dehydration, the heat pump condenser is used for heating the part of dry air and the supplementary fresh air, and the dry air heated to 110 ℃ is pressurized and heated to about 130 ℃ by the circulating booster fan and is conveyed to an inlet of the dryer.
Preferably, the circulating booster fan comprises a gas parameter acquisition end, a circulating booster processing end, a control terminal and a storage terminal.
Preferably, the circulating booster fan adopts booster modes with different degrees for the input gas according to the volume of the input gas to ensure that the overall temperature of the output gas reaches 130 ℃, wherein the specific booster modes are as follows:
the gas parameter acquisition end is used for acquiring the gas volume required to be pressurized in advance and marking the acquired gas volume as RJi, wherein i represents input gas in different stages;
the circulating pressurization processing end compares the gas volume RJi with a comparison parameter Y1 in the storage terminal, when the gas volume RJi is more than Y1, a guide factor X1 is obtained, and when the gas volume RJi is less than or equal to Y1, a guide factor X2 is obtained;
using YLi = RJi ×x1/X2 to obtain a pressure parameter YLi, wherein the/inside the formula represents "or";
the pressure parameter YLi is transmitted to the control terminal, the control terminal adjusts the pressure parameter of the circulating booster fan to YLi, and the input gas is pressurized, so that the temperature of the output gas reaches 130 ℃.
Compared with the prior art, the invention has the beneficial effects that: the high-temperature heat pump unit and the heat pump evaporator are used for cooling and dehydrating part of the wet air after dust removal, the heat pump condenser is used for heating the dehydrated dry air, and the heated dry air is pressurized and heated to about 130 ℃ by the circulating fan and is conveyed to the inlet of the dryer; the circulating booster fan is used for conveying heated gas into the pressure equalizing box, the pressure equalizing box is used for carrying out expansion and decompression equalization on the heated gas, the gas subjected to pressure equalizing is conveyed into the raw steam heater, the raw steam heater adopts a steel-aluminum composite finned tube as a main heat exchanger element, heat inside steam is conveyed into the flash evaporation dryer, salicylic acid inside the flash evaporation dryer is subjected to flash evaporation drying treatment, the heat pump evaporator, the high-temperature heat pump unit, the heat pump condenser and the circulating booster fan form a group of energy recycling components, the generated gas is recycled, a good energy-saving effect is achieved in the flash evaporation process, meanwhile, the circulating booster fan adopts different-degree boosting modes for the input gas according to the volume of the input gas, and the boosting effect is improved.
Drawings
FIG. 1 is a schematic view of an overall frame of the present invention;
fig. 2 is a schematic diagram of a principle frame of the circulating booster fan of the present invention.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the application provides a salicylic acid flash drying system, which comprises a flash dryer, a raw steam heater, a pressure equalizing box, a circulating booster fan, a heat pump evaporator, a heat pump condenser, a high-temperature heat pump unit, a cyclone separator, a bag-type dust remover, an induced draft fan and a tail gas environment-friendly device;
the high-temperature heat pump unit and the heat pump evaporator cool and dehydrate part of the wet air after dedusting, and then the heat pump condenser warms up the dehydrated dry air (simultaneously supplements part of fresh air), and the warmed dry air is pressurized and warmed up to about 130 ℃ by the circulating fan and is conveyed to the inlet of the dryer;
the circulating booster fan is used for transmitting heated gas into the pressure equalizing box, the pressure equalizing box is used for carrying out capacity expansion and pressure reduction equalization on the heated gas and transmitting the gas subjected to pressure equalizing into the raw steam heater, the raw steam heater adopts a steel-aluminum composite finned tube as a main heat exchanger element, heat in steam is transmitted into the flash evaporation dryer, and salicylic acid in the flash evaporation dryer is subjected to flash evaporation drying treatment;
the flash dryer transmits gas generated in the flash drying process into a cyclone separator, the cyclone separator separates particles in the gas, and solid particles or liquid drops with larger inertial centrifugal force are thrown to the outer wall surface to be separated by rotary motion caused by tangential introduction of air flow;
the cyclone separator transmits the treated gas into the bag-type dust remover again, the bag-type dust remover adsorbs dust particles in the gas, and the treated gas is transmitted into corresponding storage equipment;
the gas in the storage equipment is respectively conveyed into an induced draft fan and a heat pump evaporator, wherein an adjusting valve is arranged in a conveying pipeline, the input specific parameters are controlled and adjusted by an operator, the induced draft fan conveys the received gas into a tail gas environment-friendly device, and the tail gas environment-friendly device purifies the gas in the conveying process;
the heat pump evaporator, the high-temperature heat pump unit, the heat pump condenser and the circulating booster fan form a group of energy recycling components, wherein the high-temperature heat pump unit and the heat pump evaporator are used for dewatering the part of wet air after dust removal to 20 ℃, the heat pump condenser is used for heating the part of dry air and the supplementary fresh air, the dried air heated to 110 ℃ is pressurized and heated to about 130 ℃ through the circulating booster fan and is conveyed to an inlet of the dryer, the salicylic acid feeding amount is 1500kg/h, the water content is 15%, the water content after drying is less than or equal to 0.5%, and the minimum dewatering amount of the drying tower is as follows:
1500*(15-0.5)/100＝217.5kg/h；
the temperature of the air after dust removal is 70 ℃, the temperature of the air passing through a heat pump evaporator is calculated according to 20 ℃, the specific heat capacity of water vapor is 1.88 kJ/(kg.K), the latent heat of vaporization of water is 2260kJ/kg, the circulating air quantity is 13000 m/h, and the air density is 1.2kg/m 3 The specific heat of air is 1.0 kJ/(kg.K), and the refrigerating capacity of the heat pump evaporator is as follows:
(1.88*50+2260)*217.5/3600+1*13000*1.2*50/3600＝359kW；
considering the fluctuation of the system energy, the maximum load is selected according to a factor of 1.5:
359*1.5＝539kW
therefore, a heat pump unit can be selected:
the refrigerating capacity is 560kW, the heating capacity is 720, and the model is: one air-air type unit of ZG-56/72 TF-FF-7020-20100;
the circulating booster fan comprises a gas parameter acquisition end, a circulating booster processing end, a control terminal and a storage terminal;
the output end of the gas parameter acquisition end is electrically connected with the input end of the circulating supercharging processing end, the circulating supercharging processing end is in bidirectional connection with the storage terminal, and the output end of the circulating supercharging processing end is electrically connected with the input end of the control terminal;
referring to fig. 2, the circulating booster fan adopts booster modes with different degrees to the input gas according to the volume of the input gas, so that the overall temperature of the output gas reaches 130 ℃, wherein the specific booster modes are as follows:
the gas parameter acquisition end is used for acquiring the gas volume required to be pressurized in advance and marking the acquired gas volume as RJi, wherein i represents input gas in different stages;
the circulating pressurization processing end compares the gas volume RJi with a comparison parameter Y1 in the storage terminal, when the gas volume RJi is more than Y1, a guide factor X1 is obtained, and when the gas volume RJi is less than or equal to Y1, a guide factor X2 is obtained (wherein the corresponding guide factors of the gases with different gas volumes are different);
using YLi = RJi ×x1/X2 to obtain a pressure parameter YLi, wherein the/inside the formula represents "or";
the pressure parameter YLi is transmitted to the control terminal, the control terminal adjusts the pressure parameter of the circulating booster fan to YLi, and the input gas is pressurized, so that the temperature of the output gas reaches 130 ℃.
Experiment
As a set of embodiments of the present invention, the heat pump evaporator, the high-temperature heat pump unit, the heat pump condenser and the circulating booster fan form a set of energy recycling components, and specific energy saving parameters are as follows:
the steam consumption of the original system is 1.4t/h, the steam unit price is 271.16 yuan/t, and the annual steam consumption is calculated by saving 1.2 tons of steam per hour
1.2*21*320＝8064t/y
The transcritical carbon dioxide high temperature heat pump unit and the circulating booster fan are used for replacing steam to heat air in the drying tower, an original air blower and an induced draft fan are saved, the calculated use power of the high temperature heat pump unit is 160kW, the refrigerating capacity is 560kW, the heating capacity is 720kW, the use power of the circulating fan is 80kW, and the electric quantity increased every year is as the high temperature heat pump unit and the circulating booster fan replace the air blower and the induced draft fan:
(160+80-18-39/2)*21*330＝1360800kW·h/y
the steam temperature of 0.6MPa is 158.84 ℃ and the enthalpy value is 2756.4kJ/kg; the enthalpy value of water at 20 ℃ is 84.5kJ/kg; the steam use efficiency is 70%, the electricity of 1 degree is produced according to 0.32 kg of standard coal, the heat value of standard coal is 7000kCal/kg, and the annual standard coal amount is:
8064 (2756.4-84.5) 0.2389/7000/0.7-1337490 x 0.32/1000=622 tons of standard coal per year
Emission reduction CO2 amount: 622 x 2.62=1630 tons/year
Cost saving
The comprehensive electricity price is about 0.725 yuan/degree, and the steam price is 271.16 yuan/t. The transcritical carbon dioxide high-temperature heat pump unit is adopted to replace steam heating, the annual steam saving amount is 8064t/y, and the annual electric quantity increasing amount is 1337490kW.
(8064 x 271.16-1360800 x 0.725)/10000 = 120 ten thousand yuan/year
The method can save 120 ten thousand yuan per year, and has obvious benefit.
1. Machine set selection calculation
(1) The evaporator of the special transcritical carbon dioxide high-temperature heat pump unit is used for cooling part of wet air after dust removal to 20 ℃ for dehydration, then the heat pump condenser is used for heating the part of dry air and the supplementary fresh air, and the dry air heated to 110 ℃ is pressurized and heated to about 130 ℃ by a circulating pressurizing fan and is conveyed to an inlet of a dryer. The feeding amount of salicylic acid is 1500kg/h, wherein the water content is 15%, the water content after drying is less than or equal to 0.5%, and the minimum dewatering amount of a drying tower is as follows:
1500*(15-0.5)/100＝217.5kg/h；
the temperature of the air after dust removal is 70 ℃, the temperature of the air passing through the evaporator is 20 ℃, the specific heat capacity of the water vapor is 1.88 kJ/(kg.K), the latent heat of vaporization of the water is 2260kJ/kg, and the circulating air quantity is 13000m 3 The air density is 1.2kg/m 3 The specific heat of air is 1.0 kJ/(kg.K), and the refrigerating capacity of the heat pump evaporator is as follows:
(1.88*50+2260)*217.5/3600+1*13000*1.2*50/3600＝359kW；
considering the fluctuation of the system energy, the maximum load is selected according to a factor of 1.5:
359*1.5＝539kW
therefore, a heat pump unit can be selected:
the refrigerating capacity is 560kW, the heating capacity is 720, and the model is: one air-air type unit of ZG-56/72 TF-FF-7020-20100.
Main parameters of the unit:
the partial data in the formula are all obtained by removing dimension and taking the numerical value for calculation, and the formula is a formula closest to the real situation obtained by simulating a large amount of collected data through software; the preset parameters and the preset threshold values in the formula are set by those skilled in the art according to actual conditions or are obtained through mass data simulation.
The working principle of the invention is as follows: the high-temperature heat pump unit and the heat pump evaporator cool and dehydrate part of the wet air after dedusting, and then the heat pump condenser warms up the dehydrated dry air (simultaneously supplements part of fresh air), and the warmed dry air is pressurized and warmed up to about 130 ℃ by the circulating fan and is conveyed to the inlet of the dryer; the circulating booster fan is used for conveying heated gas into the pressure equalizing box, the pressure equalizing box is used for carrying out expansion and decompression equalization on the heated gas, the gas subjected to pressure equalizing is conveyed into the raw steam heater, the raw steam heater adopts a steel-aluminum composite finned tube as a main heat exchanger element, heat inside steam is conveyed into the flash evaporation dryer, salicylic acid inside the flash evaporation dryer is subjected to flash evaporation drying treatment, the heat pump evaporator, the high-temperature heat pump unit, the heat pump condenser and the circulating booster fan form a group of energy recycling components, the generated gas is recycled, a good energy-saving effect is achieved in the flash evaporation process, meanwhile, the circulating booster fan adopts different-degree boosting modes for the input gas according to the volume of the input gas, and the boosting effect is improved.
The above embodiments are only for illustrating the technical method of the present invention and not for limiting the same, and it should be understood by those skilled in the art that the technical method of the present invention may be modified or substituted without departing from the spirit and scope of the technical method of the present invention.
Claims (1)
1. The salicylic acid flash drying system is characterized by comprising a flash dryer, a raw steam heater, a pressure equalizing box, a circulating booster fan, a heat pump evaporator, a heat pump condenser, a high-temperature heat pump unit, a cyclone separator, a cloth bag dust remover, an induced draft fan and a tail gas environment-friendly device;
the high-temperature heat pump unit and the heat pump evaporator are used for cooling and dehydrating part of the wet air after dust removal, the heat pump condenser is used for heating the dehydrated dry air, and the heated dry air is pressurized and heated to about 130 ℃ by the circulating fan and is conveyed to the inlet of the dryer;
the circulating booster fan is used for transmitting heated gas into the pressure equalizing box, the pressure equalizing box is used for carrying out capacity expansion and pressure reduction equalization on the heated gas and transmitting the gas subjected to pressure equalizing into the raw steam heater, the raw steam heater adopts a steel-aluminum composite finned tube as a main heat exchanger element, heat in steam is transmitted into the flash evaporation dryer, and salicylic acid in the flash evaporation dryer is subjected to flash evaporation drying treatment;
the flash dryer transmits gas generated in the flash drying process into a cyclone separator, the cyclone separator separates particles in the gas, and solid particles or liquid drops with larger inertial centrifugal force are thrown to the outer wall surface to be separated by rotary motion caused by tangential introduction of air flow;
the cyclone separator transmits the treated gas into the bag-type dust remover again, the bag-type dust remover adsorbs dust particles in the gas, and the treated gas is transmitted into corresponding storage equipment;
the gas in the storage equipment is respectively conveyed into an induced draft fan and a heat pump evaporator, wherein an adjusting valve is arranged in a conveying pipeline, the input specific parameters are controlled and adjusted by an operator, the induced draft fan conveys the received gas into a tail gas environment-friendly device, and the tail gas environment-friendly device purifies the gas in the conveying process;
the heat pump evaporator, the high-temperature heat pump unit, the heat pump condenser and the circulating booster fan form a group of energy recycling components, wherein the high-temperature heat pump unit and the heat pump evaporator are used for dehydrating the part of wet air after dust removal to 20 ℃, the heat pump condenser is used for heating the part of dry air and the supplementary fresh air, and the dry air heated to 110 ℃ is pressurized and heated to about 130 ℃ through the circulating booster fan and is conveyed to an inlet of the dryer;
the circulating booster fan comprises a gas parameter acquisition end, a circulating booster processing end, a control terminal and a storage terminal;
the circulating booster fan adopts booster modes with different degrees to the input gas according to the volume of the input gas to ensure that the overall temperature of the output gas reaches 130 ℃, wherein the specific booster modes are as follows:
the gas parameter acquisition end is used for acquiring the gas volume required to be pressurized in advance and marking the acquired gas volume as RJi, wherein i represents input gas in different stages;
the circulating pressurization processing end compares the gas volume RJi with a comparison parameter Y1 in the storage terminal, when the gas volume RJi is more than Y1, a guide factor X1 is obtained, and when the gas volume RJi is less than or equal to Y1, a guide factor X2 is obtained;
by using
Obtaining a pressure parameter YLi, wherein +.>
Represents an OR;
the pressure parameter YLi is transmitted to the control terminal, the control terminal adjusts the pressure parameter of the circulating booster fan to YLi, and the input gas is pressurized, so that the temperature of the output gas reaches 130 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102191959A (en) * | 2011-03-29 | 2011-09-21 | 冯伟忠 | Step recycling method and device of boiler flue gas waste heat |
| CN102679155B (en) * | 2012-06-12 | 2013-09-18 | 江苏汉龙环保科技有限公司 | Carbon dioxide pressurizing conveying device |
| CN103471369A (en) * | 2013-09-05 | 2013-12-25 | 山东天力干燥股份有限公司 | Steam rotation drying process by means of superheated steam carrying moisture and lignite drying method |
| CN203837455U (en) * | 2014-04-18 | 2014-09-17 | 浙江新和成特种材料有限公司 | Vacuum flash drying system |
| CN106197001A (en) * | 2016-08-31 | 2016-12-07 | 华北制药集团爱诺有限公司 | A kind of flash dryer circulation of tail gas application system |
| CN208365949U (en) * | 2017-12-29 | 2019-01-11 | 江阴市吉瑞机械制造有限公司 | Energy-saving double-effect heat pump closed circulating dry system |
| CN211650948U (en) * | 2019-12-16 | 2020-10-09 | 江阴市南方干燥设备有限公司 | Closed cycle type spin flash drying equipment |
| CN212198888U (en) * | 2020-04-09 | 2020-12-22 | 浙江浙能技术研究院有限公司 | Desulfurization waste water concentration decrement device based on film evaporation technique |
| CN215909273U (en) * | 2021-04-05 | 2022-02-25 | 上海复璐帝流体技术有限公司 | Carbon dioxide phase change liquefaction circulation heating system and air conditioner heater |
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