CN114993026A - Low-energy-consumption efficient biomass drying method - Google Patents
Low-energy-consumption efficient biomass drying method Download PDFInfo
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- CN114993026A CN114993026A CN202210792855.7A CN202210792855A CN114993026A CN 114993026 A CN114993026 A CN 114993026A CN 202210792855 A CN202210792855 A CN 202210792855A CN 114993026 A CN114993026 A CN 114993026A
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- drying
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- hot air
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- 238000001035 drying Methods 0.000 title claims abstract description 133
- 239000002028 Biomass Substances 0.000 title claims abstract description 50
- 238000005265 energy consumption Methods 0.000 title claims abstract description 20
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 13
- 238000011897 real-time detection Methods 0.000 claims description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000002912 waste gas Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
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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
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- 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
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a low-energy-consumption high-efficiency biomass drying method, relates to the technical field of drying, and provides a scheme aiming at the problems of uneven drying, low efficiency, low yield and the like of biomass drying in the prior art, wherein the scheme comprises the following steps: blowing air into a multilayer heater of a drying box body by a blower to heat; hot air enters a plurality of drying zones; drying the biomass by using a plurality of drying zones in a drying box body; the hot air left after drying in the drying area is sent to a hot air circulation section; also comprises the step of dehumidifying in the drying area. The drying device has the advantages that the inside and outside moisture of the crushed biomass can be dried in a short time. Waste gas generated in the biomass drying process can be well utilized, is not discharged outside the drying box body, does not cause environmental pollution, and simultaneously greatly improves the energy utilization rate.
Description
Technical Field
The invention relates to the technical field of drying, in particular to a low-energy-consumption high-efficiency biomass drying method.
Background
Biomass mainly comprises agricultural and forest products and residues thereof, such as straws, rice hulls, corncobs, wood chips and the like. The biomass is used as fuel, and the biomass fuel has low pollution and low emission, so that the requirements of governments on energy conservation and environmental protection in various parts in recent years are met, and the sustainable development of economy, society and ecology is realized. However, after the biomass is crushed, not only moisture is present on the outside, but also a large amount of moisture is contained inside.
The drying of biomass in the prior art has the problems of uneven drying, low efficiency, low yield and the like. It is currently common to continuously input fresh air and output hot and humid air by exchanging the fresh air with the hot and humid air. However, it is often difficult to quickly remove the moisture from the biomass. And if the drying time is prolonged to dry the moisture in the biomass, the cost is high. Meanwhile, in the prior art, heat in the drying process cannot be effectively utilized or recycled, so that energy is wasted, and the use efficiency of the energy is reduced.
Disclosure of Invention
The invention aims to provide a biomass drying method with low energy consumption and high efficiency so as to solve the problems in the prior art.
The low-energy-consumption high-efficiency biomass drying method comprises the following steps: blowing air into a multilayer heater of a drying box body by a blower to heat; hot air enters a plurality of drying zones; drying the biomass by using a plurality of drying zones in a drying box body; the hot air left after drying in the drying area is sent to a hot air circulation section; also comprises the step of dehumidifying in the drying area.
Preferably, the hot air remained after drying in the drying zone is sent to the hot air circulation section, and the hot air circulation section comprises: when steam got into the air inlet duct, first temperature sensor carried out real-time detection to the temperature of steam. The temperature of hot gas is obtained through the temperature sensor, and real-time monitoring can be carried out according to the temperature.
Preferably, the hot air remaining after drying in the drying zone is sent to the hot air circulation section, which further comprises: a plurality of temperature values t obtained by the controller for a plurality of temperature sensors 1 To t n ，t 1 To t n Is determined according to the position of the humidity sensor, for a plurality of temperature values t 1 To t n Weighted average is carried out to obtain t a (ii) a The set temperature value is t x When t is a Less than t x And when the hot air is used, the residual hot air returns to the multilayer heater through the hot air circulation section to be reheated and utilized. Heavy gasThe new use can improve the energy utilization rate.
Preferably, the hot air circulation section comprises an air inlet duct and an air outlet duct connected with the air inlet duct channel.
Preferably, the multi-layer heater further comprises a second temperature sensor for detecting the temperature of hot air in the multi-layer heater in real time, and the multi-layer heater is turned off when the temperature detected by the second temperature sensor is higher than the set temperature. The controller monitors the temperature of the multilayer heater, and the multilayer heater is closed in time, so that the waste of energy is avoided.
Preferably, the moisture removal in the drying zones is performed independently in each drying zone.
Preferably, a humidity sensor in the drying zone is included to detect the humidity in the drying zone.
Preferably, the method also comprises the step of measuring a plurality of humidity values x 1 To x n ，x 1 To x n The weight of the humidity sensor is determined according to the position of the humidity sensor, and a plurality of humidity values x are obtained 1 To x n Weighted average is carried out to obtain x a (ii) a Set humidity value x x When x is a Greater than x x In time, the controller can control the dehumidifying fan to dehumidify.
Preferably, each drying area can independently dry the biomass, and each drying area can change the wind speed and the humidity in the drying area according to the water content and the volume of the biomass. The change of each drying area parameter is more favorable for the biomass to be dried quickly to reach the required water content.
Preferably, the plurality of drying zones comprises a first drying zone, a second drying zone, a third drying zone, a fourth drying zone and a fifth drying zone. And setting the actual production condition of the five drying areas fitting enterprises.
The low-energy-consumption high-efficiency biomass drying method disclosed by the invention at least has the following advantages:
1. the moisture inside and outside the crushed biomass can be dried in a short time. The controller can adjust parameters at any time according to the obtained data after carrying out weighted average on the data collected by the sensor, and has strong adjustability and high flexibility. When the temperature sensor senses that the temperature in the multilayer heater reaches the required temperature, the controller can control the multilayer heater to be closed, so that resource waste is avoided, and high efficiency and energy conservation are achieved. When the biomass is dried in the drying area, the overhigh humidity in the drying area can be dehumidified by the dehumidifying fan, so that the rapid drying is favorably realized. The controller timely changes the wind speed and the humidity in the drying areas according to the water content and the volume of the biomass in each drying area. The timeliness and effectiveness of monitoring are guaranteed.
2. The hot air can return to the multilayer heater for reheating and recycling after drying the biomass in the drying zone through the hot air circulation section. Waste gas generated in the biomass drying process can be well utilized, is not discharged outside the drying box body, does not cause environmental pollution, and simultaneously greatly improves the energy utilization rate.
Drawings
FIG. 1 is a schematic flow diagram of a low energy consumption and high efficiency biomass torrefaction process according to the present invention.
Detailed Description
As shown in fig. 1, the low-energy-consumption and high-efficiency biomass drying method of the invention comprises the following steps: blowing air into a multilayer heater of a drying box body by a blower to heat; hot air enters a plurality of drying zones; drying the biomass by using a plurality of drying zones in a drying box body; the hot air left after drying in the drying area is sent to a hot air circulation section. The hot air enters the plurality of drying areas, namely a first drying area, a second drying area, a third drying area, a fourth drying area and a fifth drying area. The biomass sequentially enters a first drying area, a second drying area, a third drying area, a fourth drying area and a fifth drying area through an inlet on the drying box body. The biomass is dried by a plurality of drying zones and then discharged through an outlet on the drying box body.
The hot air left after drying in the drying area is sent to a hot air circulation section, and the hot air circulation section comprises: when hot gas got into the air inlet duct, first temperature sensor carried out real-time detection and made the change to the temperature of hot gas. The temperature can be monitored and adjusted in time. A plurality of temperature values t obtained by the controller for a plurality of temperature sensors 1 To t n ，t 1 To t n Is determined according to the position of the humidity sensor, for a plurality of temperature values t 1 To t n Weighted average is carried out to obtain t a . The set temperature value is t x When t is a Less than t x And when the hot air is used, the residual hot air returns to the multilayer heater through the hot air circulation section to be reheated and utilized. The hot air circulation section comprises an air inlet duct and an air outlet duct connected with the air inlet duct channel. For example: the temperature of hot air in the drying zone must reach 85 degrees, while the air input is only 20 degrees. Air enters the multilayer heater through the air blower and then enters the drying area through the air inlet duct to dry the biomass. When the drying of the biomass is finished, the residual hot gas in the drying area is reduced from 85 ℃ to 65 ℃. In this case, the remaining hot air is simply returned to the multi-layer heater through the hot air circulation section, and heated from 65 degrees to 85 degrees. The heating from 20 ℃ to 85 ℃ is not needed, and the utilization rate and the efficiency of energy sources are substantially and greatly improved.
The multi-layer heater is characterized by also comprising a second temperature sensor for detecting the temperature of hot air in the multi-layer heater in real time, and when the temperature detected by the second temperature sensor is higher than the set temperature, the multi-layer heater is closed. The controller monitors the temperature of the multilayer heater, and can timely close the multilayer heater to avoid energy waste. The dehumidifying in the drying zones is independent for each drying zone and includes a humidity sensor in the drying zone detecting the humidity in the drying zone. Further comprising measuring a plurality of humidity values x 1 To x n ，x 1 To x n The weight of the humidity sensor is determined according to the position of the humidity sensor, and a plurality of humidity values x are obtained 1 To x n Weighted average is carried out to obtain x a (ii) a Set humidity value x x When x is a Greater than x x And when the controller is used, the controller can control the moisture exhaust fan to perform moisture exhaust. Each drying area can independently dry the biomass, and each drying area changes the wind speed and the humidity in the drying area according to the water content and the volume of the biomass. Each drying area is provided with at least one temperature sensor, a humidity sensor and an air speed sensor. Can in time adjust according to the data that the sensor obtained to reach fast drying, let the water content that the living beings realized will reaching.
The biomass drying method disclosed by the invention has the advantages of low energy consumption, high efficiency, simplicity in operation and easiness in operation.
Various other modifications and changes may occur to those skilled in the art based on the foregoing teachings and concepts, and all such modifications and changes are intended to be included within the scope of the appended claims.
Claims (10)
1. The low-energy-consumption high-efficiency biomass drying method is characterized by comprising the following steps of: blowing air into a multilayer heater of a drying box body by a blower to heat; hot air enters a plurality of drying zones; drying the biomass by using a plurality of drying zones in a drying box body; the residual hot air after drying in the drying zone is sent to a hot air circulation section; also comprises a drying area for moisture removal.
2. The method for drying biomass with low energy consumption and high efficiency as claimed in claim 1, wherein the hot air remained after drying in the drying zone is sent to a hot air circulation section, and the method comprises the following steps: when steam got into the air inlet duct, first temperature sensor carried out real-time detection to the temperature of steam.
3. The method for drying biomass with low energy consumption and high efficiency as claimed in claim 2, wherein the hot air remained after drying in the drying zone is sent to the hot air circulation section, and the method further comprises the following steps: a plurality of temperature values t obtained by the controller for a plurality of temperature sensors 1 To t n ，t 1 To t n Is determined according to the position of the humidity sensor, for a plurality of temperature values t 1 To t n Weighted average is carried out to obtain t a (ii) a The set temperature value is t x When t is a Less than t x And when the hot air is used, the residual hot air returns to the multilayer heater through the hot air circulation section to be reheated and utilized.
4. The method for drying biomass with low energy consumption and high efficiency as claimed in claim 3, wherein the hot air circulation section comprises an air inlet duct and an air outlet duct connected with the air inlet duct.
5. The method for drying biomass with low energy consumption and high efficiency as claimed in claim 4, further comprising a second temperature sensor for detecting the temperature of the hot gas in the multi-layer heater in real time, and turning off the multi-layer heater when the temperature detected by the second temperature sensor is higher than the set temperature.
6. The method for drying biomass with low energy consumption and high efficiency as claimed in claim 1, wherein the moisture removal in the drying zones is independent moisture removal in each drying zone.
7. The method for drying biomass with low energy consumption and high efficiency as claimed in claim 6, characterized by comprising a humidity sensor in the drying zone for detecting the humidity in the drying zone.
8. The method for biomass torrefaction with low energy consumption and high efficiency as claimed in claim 7, further comprising measuring a plurality of humidity values x 1 To x n ，x 1 To x n The weight of the humidity sensor is determined according to the position of the humidity sensor, and a plurality of humidity values x are obtained 1 To x n Weighted average is carried out to obtain x a (ii) a Set humidity value x x When x is a Greater than x x In time, the controller can control the dehumidifying fan to dehumidify.
9. The method for drying biomass with low energy consumption and high efficiency as claimed in claim 1, wherein each drying zone can independently dry the biomass, and each drying zone can change the wind speed and humidity in the drying zone according to the moisture content and volume of the biomass.
10. The method for biomass torrefaction with low energy consumption and high efficiency of claim 1, wherein the plurality of drying zones includes a first drying zone, a second drying zone, a third drying zone, a fourth drying zone, and a fifth drying zone.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210792855.7A CN114993026A (en) | 2022-07-05 | 2022-07-05 | Low-energy-consumption efficient biomass drying method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210792855.7A CN114993026A (en) | 2022-07-05 | 2022-07-05 | Low-energy-consumption efficient biomass drying method |
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| CN114993026A true CN114993026A (en) | 2022-09-02 |
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| CN202210792855.7A Pending CN114993026A (en) | 2022-07-05 | 2022-07-05 | Low-energy-consumption efficient biomass drying method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117329788A (en) * | 2023-12-01 | 2024-01-02 | 山东艾琳智能科技有限公司 | Intelligent drying system based on Internet |
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|---|---|---|---|---|
| CN103776254A (en) * | 2014-01-20 | 2014-05-07 | 浙江闽锋化学有限公司 | Hot air circulation drying system and method |
| CN203986001U (en) * | 2014-05-30 | 2014-12-10 | 河南中联热科工业节能有限公司 | A kind of humidity conditioner of drying for date |
| CN204007040U (en) * | 2014-08-03 | 2014-12-10 | 浙江海亮环境材料有限公司 | A kind of for the dry air interchanger of SCR denitrating catalyst one-level |
| CN109764671A (en) * | 2019-01-15 | 2019-05-17 | 浏阳市鸿安机械制造有限公司 | Fireworks drying equipment and its long-range control method |
| CN112595041A (en) * | 2020-12-30 | 2021-04-02 | 广东中鹏热能科技有限公司 | Temperature and humidity control method, device and system for rapid drying kiln |
-
2022
- 2022-07-05 CN CN202210792855.7A patent/CN114993026A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776254A (en) * | 2014-01-20 | 2014-05-07 | 浙江闽锋化学有限公司 | Hot air circulation drying system and method |
| CN203986001U (en) * | 2014-05-30 | 2014-12-10 | 河南中联热科工业节能有限公司 | A kind of humidity conditioner of drying for date |
| CN204007040U (en) * | 2014-08-03 | 2014-12-10 | 浙江海亮环境材料有限公司 | A kind of for the dry air interchanger of SCR denitrating catalyst one-level |
| CN109764671A (en) * | 2019-01-15 | 2019-05-17 | 浏阳市鸿安机械制造有限公司 | Fireworks drying equipment and its long-range control method |
| CN112595041A (en) * | 2020-12-30 | 2021-04-02 | 广东中鹏热能科技有限公司 | Temperature and humidity control method, device and system for rapid drying kiln |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117329788A (en) * | 2023-12-01 | 2024-01-02 | 山东艾琳智能科技有限公司 | Intelligent drying system based on Internet |
| CN117329788B (en) * | 2023-12-01 | 2024-03-22 | 山东科技职业学院 | Intelligent drying system based on Internet |
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