CN116380710A - Hot air penetrating type material drying characteristic measuring device and method - Google Patents
Hot air penetrating type material drying characteristic measuring device and method Download PDFInfo
- Publication number
- CN116380710A CN116380710A CN202310439050.9A CN202310439050A CN116380710A CN 116380710 A CN116380710 A CN 116380710A CN 202310439050 A CN202310439050 A CN 202310439050A CN 116380710 A CN116380710 A CN 116380710A
- Authority
- CN
- China
- Prior art keywords
- hot air
- drying chamber
- penetrating type
- communication electronic
- penetrating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000000149 penetrating effect Effects 0.000 title claims abstract description 101
- 239000000463 material Substances 0.000 title claims abstract description 67
- 238000001035 drying Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000007602 hot air drying Methods 0.000 claims abstract description 86
- 238000004891 communication Methods 0.000 claims abstract description 66
- 230000001681 protective effect Effects 0.000 claims abstract description 9
- 238000002474 experimental method Methods 0.000 claims description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000012937 correction Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 18
- 239000007789 gas Substances 0.000 description 23
- 238000012544 monitoring process Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 239000010815 organic waste Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
-
- 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
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a device and a method for measuring the drying characteristics of hot air penetrating type materials, wherein the device comprises an air source, a constant flow pump, an evaporator, an electric heater, a high temperature resistant air guide pipeline, a penetrating type hot air drying chamber, a thermocouple, a humidity sensor, a lever, a right tray, a supporting platform, a counterweight, a left tray, a communication electronic balance, a lifting platform, a protective cover, a tail gas incinerator, a data acquisition and analysis device and the like. The material is dried by the hot air in the penetrating type hot air drying chamber in a vertical penetrating material mode, the material quality change in the drying process is indirectly obtained by measuring the unbalance amount of the lever by the communication electronic balance, the accurate measurement of the material quality change under the hot air penetrating type drying condition is ensured, and meanwhile, the system is provided with a data acquisition and analysis system, and the material quality change in the drying process and the temperature and humidity in the penetrating type hot air drying chamber can be monitored in real time.
Description
Technical Field
The invention relates to a drying experiment system, in particular to an analysis experiment device capable of researching material drying characteristic change when hot air penetrates through a material under the control of various factors, and particularly relates to a device and a method for measuring the drying characteristic of the hot air penetrating through the material.
Background
In the current life and industry, a large amount of materials are not separated from the drying treatment, the volume and the quality of the materials after the drying treatment are effectively reduced, and the heat value of the fuel such as coal, biomass and the like after the drying treatment is greatly increased, so that the materials are greatly convenient to store, transport and efficiently utilize. The most mature and simple drying mode is hot air drying.
The prior device and method for measuring the hot air drying characteristics of materials are mostly horizontal airflow type drying devices or rotary shell type drying devices which enable hot air to pass along the surfaces of the materials, and the device and method for measuring the drying characteristics of the materials lack of the hot air vertically penetrating through a material layer. The main reason is that when the hot air vertically penetrates through the material, the material is subjected to the action of the hot air consistent with the mass direction of the material, and meanwhile, the quality of the material cannot be directly measured due to the fact that the hot air needs to penetrate through the material, so that the quality measurement problem when the hot air penetrates through the material is difficult to solve.
Disclosure of Invention
The invention provides a device and a method for measuring the drying characteristics of a hot air penetrating type material, which aim to solve the problem that the quality of the material cannot be directly measured when hot air vertically penetrates through the material, realize that the hot air in a penetrating type hot air drying chamber can dry the material in a vertical penetrating type material mode, accurately measure the quality change in the drying process, and monitor the temperature and the humidity in the penetrating type hot air drying chamber in real time.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a hot air penetrating type material drying characteristic measuring device, includes air supply, constant flow pump, evaporimeter, electric heater, high temperature resistant air guide pipeline, penetrating type hot air drying chamber, lever, right tray, supporting platform, counter weight, left tray, communication electronic balance, elevating platform, tail gas incinerator and data acquisition and analysis system;
the air source is connected with the flowmeter, the constant flow pump is connected with the water source, and the flowmeter and the outlet of the constant flow pump are connected with the inlet of the evaporator together; the outlet of the evaporator is connected with the inlet of the electric heater; the outlet of the electric heater is connected with the inlet of the penetrating hot air drying chamber; the outlet of the penetrating type hot air drying chamber is connected with the tail gas incinerator, and the penetrating type hot air drying chamber is arranged on the right tray; a supporting platform is arranged below the right tray, and the right tray is connected with the left tray through a lever; a counterweight is placed on the left tray, and a communication electronic balance is arranged below the left tray; a lifting platform is arranged below the communication electronic balance, and the communication electronic balance is connected with a data acquisition and analysis system;
the pipeline that communicates between electric heater, penetrating type hot air drying room and the tail gas burns burning furnace adopts high temperature resistant air guide pipeline, set up the main road control valve on the high temperature resistant air guide pipeline between the export of electric heater and the entry of penetrating type hot air drying room, set up bypass pipeline between the export of electric heater and the entry of tail gas burning furnace, set up the bypass control valve on the bypass pipeline, bypass pipeline adopts high temperature resistant air guide pipeline.
Further, the hot air drying device also comprises a protective cover, wherein the penetrating type hot air drying chamber, the lever, the right tray, the supporting platform, the counterweight, the left tray, the communication electronic balance and the lifting platform are uniformly distributed in the protective cover.
Further, the high-temperature-resistant air guide pipelines are flexible pipelines.
Further, the penetrating type hot air drying chamber comprises a shell, the outer side of the shell is wrapped with a heat-resistant heat-insulating material, supporting feet are arranged at the bottom of the shell, and a detachable sieve plate is arranged at the inner side of the penetrating type hot air drying chamber.
Further, a thermocouple and a humidity sensor are arranged in the penetrating type hot air drying chamber, and the thermocouple and the humidity sensor are connected with the data acquisition and analysis system.
Further, the weighing precision of the communication electronic balance is not lower than 0.001g, and when the communication electronic balance is used, the communication electronic balance transmits data to a data acquisition and analysis system in real time.
The measurement method of the drying characteristics of the hot air penetrating type material comprises the following steps of error correction, blank experiment and formal experiment:
step 1: obtaining a relation between the mass change quantity in the actual penetrating type hot air drying chamber and the indication change quantity of the communication electronic balance according to the unequal arm coefficients of the lever, and carrying out error correction according to the relation;
step 2: performing a blank experiment to obtain the indication variable quantity of the communication electronic balance, and making a mass variable quantity graph in a blank experiment penetrating type hot air drying chamber according to the relation;
step 3: performing a formal experiment to obtain the indication variable quantity of the communication electronic balance, and making a mass variable quantity graph in a penetrating type hot air drying chamber of the formal experiment according to the relation;
step 4: and superposing the mass change amount curve graph in the formal experiment penetration type hot air drying chamber and the mass change amount curve graph in the blank experiment penetration type hot air drying chamber to obtain a corrected material drying characteristic curve graph.
Further, the step 1 specifically includes the following steps:
step 1.1: let the length of the left arm of the lever be L 1 The length of the right arm is L 2 It is assumed that L is due to its unequal arm properties 1 >L 2 The communication electronic level top is lifted to the balance position of the bottom of the left tray when the lever level is reached by the lifting table, and the indication of the communication electronic level at the moment is recorded as m 0 Let the left tray and the right tray have the same mass and m t At this time, the two side relations of the lever are obtained according to the moment balance principle:
step 1.2: put the same mass m in the left tray and the right tray f Recording the indication m of the communication electronic balance at the moment 1 At this time, according to the moment balance, the following is obtained:
step 1.3: the simultaneous formula (I) and the formula (II) are obtained:
substituting the formula (III) into the formula (I) to obtain the lever inequality arm coefficient:
at this time, in the formula (IV),
is the lever unequal arm coefficient;
step 1.4: when the indication change amount of the communication electronic balance is deltax, the mass change amount in the actual penetrating type hot air drying chamber is as follows:
in the formula (V), Δm is the mass change amount in the actual penetrating hot air drying chamber, L 1 Is the length of the left arm of the lever, L 2 The arm length of the right side of the lever is delta x, and the indication change quantity of the communication electronic balance is delta x.
Further, the specific steps of the step 2 include:
step 2.1: the penetrating type hot air drying chamber is placed on the right tray, the right tray is lowered onto the supporting platform, the lever is not in a horizontal state any more, zero clearing operation is carried out on the communication electronic balance, and then the position of the lifting table is adjusted, so that the communication electronic balance is lifted to the balance position at the bottom of the left tray when the lever is horizontal;
step 2.2: adding a counterweight into the left tray until the lever is restored to a horizontal state, wherein the data of the communication electronic balance is a very small positive value;
step 2.3: confirming the temperature and humidity of hot air required by an experiment, adjusting the parameters of a flowmeter and the water inflow amount of a constant flow pump, adjusting the temperatures of an evaporator and an electric heater, opening a main control valve, closing a bypass control valve, introducing hot air, and confirming that the data transmitted to a data acquisition and analysis system by a thermocouple and a humidity sensor are consistent and stable with preset experiment conditions; and monitoring the stability of the temperature and the humidity of the hot air in the experimental process through a data acquisition and analysis system, recording the variation of the data of the communication electronic balance in the experimental process, and making a mass variation curve graph in the penetrating type hot air drying chamber of the blank experiment.
Further, the specific steps of the step 3 include:
and (3) closing the main path control valve, opening the bypass control valve, placing the material to be tested in the penetrating type hot air drying chamber after the penetrating type hot air drying chamber is cooled, starting the tail gas incinerator, and repeating the step (2) to obtain a mass change amount graph in the penetrating type hot air drying chamber for formal experiments.
Compared with the prior art, the invention has the beneficial effects that:
the device for measuring the drying characteristics of the hot air penetrating type material provided by the invention is different from the horizontal airflow type drying in which hot air passes along the surface of the material in the existing drying characteristics experimental device, and the material is dried by the hot air in a penetrating type hot air drying chamber in a mode of vertically penetrating the material. The communication electronic balance is connected with the data acquisition and analysis system, so that real-time monitoring of the change of the mass in the penetrating hot air drying chamber in the drying process can be realized; the air source is provided with the pressure reducing valve and the flowmeter, water is pumped into the system by the constant flow pump, the outlet of the flowmeter is connected with the outlet of the constant flow pump, and the air is utilized to bring moisture into the evaporator to be evaporated first and then into the electric heater to be heated to the required temperature, so that the change and control of the drying conditions of temperature and humidity in the drying characteristic measurement experiment are realized; because the dried tail gas possibly contains a certain amount of organic waste gas, the tail gas incinerator is arranged, so that the tail gas can be emptied after being treated, and the environment is protected; the supporting platform is arranged at a lower part of the balance position at the bottom of the right tray when the lever is horizontal, and the lifting platform lifts the top of the communication electronic balance to the balance position at the bottom of the left tray when the lever is horizontal, so that the rotation angle of the lever can be limited, and the abrasion of the lever can be reduced.
Further, the module related to mass measurement in the invention comprises a penetrating hot air drying chamber, a lever, a right tray, a supporting platform, a counterweight, a left tray, a communication electronic balance and a lifting platform which are uniformly distributed in the protective cover, thereby reducing the influence of the environment on mass measurement and further ensuring the accuracy of mass measurement.
Furthermore, the invention adopts the high temperature resistant air guide pipelines which are flexible pipelines, so that the influence of equipment vibration on quality measurement in the experimental process can be reduced.
Further, the thermocouple and the humidity sensor in the penetrating type hot air drying chamber are connected with the data acquisition and analysis system, so that the real-time monitoring of the hot air temperature and the humidity drying condition in the drying process can be realized; the bottom of the penetrating type hot air drying chamber is provided with the supporting feet, so that the penetrating type hot air drying chamber can be stably placed on the tray, and enough space is reserved for discharging bottom gas; the heat-resistant heat-insulating material is wrapped outside the penetrating type hot air drying chamber, so that the heat loss of the penetrating type hot air drying chamber can be reduced, and the energy consumption is reduced.
Furthermore, the weighing precision of the communication electronic balance is not lower than 0.001g, after the weight is utilized to basically balance the mass of the penetrating hot air drying chamber and the materials in the penetrating hot air drying chamber, the measured mass change quantity of the communication electronic balance is the unbalance quantity of the lever, namely the ratio of the mass of water taken away in the drying process to the unequal arm coefficient of the lever, so that the measuring range in the weighing process only depends on the mass of water in the materials and the unequal arm coefficient of the lever, the measuring range is greatly reduced, and the mass measurement with small measuring range and high precision can be realized under the condition of low cost.
According to the measuring method based on the hot air penetrating type material drying characteristic measuring device, firstly, the lever unequal arm coefficients are measured based on the lever principle, so that error correction is carried out on the measuring result of material quality change, and the measuring precision is improved; the measurement method adopted by the invention carries out blank experiments before formal experiments, reduces systematic errors generated by the influence of external environment in the experimental process, and further improves the accuracy of material quality change measurement; in the measuring process of the measuring method adopted by the invention, the rotation trend of the lever is blocked by the communication electronic balance because the mass of the drying chamber side is attenuated or unchanged, and the lever is in a stable state, so that the stability of the device in the mass measuring process is ensured.
Drawings
FIG. 1 is a schematic diagram of a device for measuring drying characteristics of a through-air type material according to the present invention;
fig. 2 is a schematic structural view of a through-type hot air drying chamber according to the present invention.
Wherein, 1-gas source; 2-a flow meter; 3-a constant flow pump; 4-an evaporator; 5-an electric heater; 6-a high-temperature-resistant air guide pipeline; 6-1-a main control valve; 6-2-bypass piping; 6-3-bypass control valve; 7-a penetrating hot air drying chamber; 7-1-inlet; 7-2-outlet; 7-3-sieve plates; 7-4 supporting feet; 7-5 of a heat-resistant thermal insulation material; 8-thermocouple; 9-a humidity sensor; 10-lever; 11-right tray; 12-a support platform; 13-counterweight; 14-left tray; 15-a communication electronic balance; 16-lifting platform; 17-a protective cover; 18-a tail gas incinerator; 19-data acquisition and analysis system.
Detailed Description
In order that those skilled in the art will better understand the present invention, a further detailed description of the present invention will be given with reference to the accompanying drawings and specific embodiments, which are meant to be illustrative of the invention rather than limiting.
It should be noted that the terms "comprises" and "comprising," along with any variations thereof, in the description and claims of the present invention are intended to cover a non-exclusive inclusion, such as a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, the invention provides a device and a method for measuring drying characteristics of a hot air penetrating type material, which specifically comprise the following steps: the device comprises an air source 1, a flowmeter 2, a constant flow pump 3, an evaporator 4, an electric heater 5, a high temperature resistant air duct 6, a penetrating type hot air drying chamber 7, a thermocouple 8, a humidity sensor 9, a lever 10, a right tray 11, a supporting platform 12, a counterweight 13, a left tray 14, a communication electronic balance 15, a lifting platform 16, a protective cover 17, a tail gas incinerator 18 and a data acquisition and analysis system 19.
A water source is arranged in the constant flow pump 3, and the outlet of the flowmeter 2 and the outlet of the constant flow pump 3 are connected with the inlet of the evaporator 4 so that moisture is brought into the system by gas; the outlet of the evaporator 4 is connected with the inlet of the electric heater 5; the outlet of the electric heater 5 is connected with the inlet 7-1 of the penetrating hot air drying chamber 7; the outlet 7-2 of the penetrating hot air drying chamber 7 is connected with a tail gas incinerator 18, and the penetrating hot air drying chamber 7 is arranged on the right tray 11; a supporting platform 12 is arranged below the right tray 11, and the right tray 11 is connected with a left tray 14 through a lever 10; a counterweight 13 is arranged on the left tray 14, and a communication electronic balance 15 is arranged below the left tray 14; a lifting table 16 is arranged below the communication electronic balance 15, and the communication electronic balance 15 is connected with a data acquisition and analysis system 19, so that real-time monitoring is realized.
A thermocouple 8 and a humidity sensor 9 are arranged in the penetrating hot air drying chamber 7 to measure the temperature of hot air and the humidity drying condition in the drying process. The top of the penetrating hot air drying chamber is detachable. Still arrange the sieve 7-3 in the penetration type hot air drying chamber 7 for pile up the material, the sieve 7-3 can be dismantled, can select and change according to the solid material particle diameter difference, and make things convenient for the cleaning work after the experiment finishes. Three supporting feet 7-4 are arranged at the bottom of the penetrating hot air drying chamber 7, so that the supporting feet are stably placed on the tray, and a certain space is reserved for discharging bottom air. The penetrating type hot air drying chamber 7 is made of a high temperature resistant material with low heat conductivity coefficient, and the heat resistant and insulating material 7-5 is wrapped outside the penetrating type hot air drying chamber 7, so that the heat loss of the penetrating type hot air drying chamber is reduced, and the energy consumption is reduced.
In the invention, the air source 1 is air or nitrogen and other gases, the air source 1 is provided with a pressure reducing valve and a flowmeter 2, water is pumped into a system by a constant flow pump 3, the outlet of the flowmeter 2 is connected with the outlet of the constant flow pump 3, and moisture is brought into an evaporator 4 by the gas to be evaporated, and then the water enters an electric heater 5 to be heated to a required temperature, so that the change and control of the drying conditions of temperature and humidity in a drying characteristic measurement experiment are realized.
The high-temperature-resistant air guide pipelines 6 are flexible pipelines, so that the influence of equipment vibration on quality measurement in the experimental process is reduced.
The invention is different from the horizontal airflow type drying in which the hot air passes along the surface of the material in the existing drying characteristic experiment device, and in the invention, the hot air in the penetrating type hot air drying chamber 7 dries the material in a mode of vertically penetrating the material.
The dried tail gas may contain a certain amount of organic waste gas, so that the tail gas incinerator 18 is arranged, and the tail gas is exhausted after being treated by the tail gas incinerator 18.
The supporting platform 12 should be arranged at a short distance below the bottom balance position of the right tray 11 when the lever 10 is horizontal, limit the rotation angle of the lever 10, reduce the abrasion of the lever 10, and the lifting platform 16 can be lifted to a height required to be capable of lifting the top of the communication electronic balance 15 to the bottom balance position of the left tray 14 when the lever 10 is horizontal.
The communication electronic balance 15 does not weigh the material directly, but rather takes an indirect measurement with the lever 10. After the weight 13 is utilized to basically balance the mass of the penetrating hot air drying chamber 7 and the materials in the penetrating hot air drying chamber, the mass change measured by the communication electronic balance 15 is the unbalance of the lever 10, namely the mass of the water taken away in the drying process, so that the measuring range in the weighing process only depends on the mass of the water in the materials, the measuring range is greatly reduced, the mass measurement with small measuring range and high precision can be realized under the condition of low cost, and the weighing precision of the communication electronic balance 15 is not lower than 0.001g. Meanwhile, the modules related to mass measurement comprise a penetrating hot air drying chamber 7, a lever 10, a right tray 11, a supporting platform 12, a counterweight 13, a left tray 14, a communication electronic balance 15 and a lifting platform 16 which are uniformly arranged in a protective cover 17, so that the influence of the environment on mass measurement is reduced, and the accuracy of mass measurement is further ensured.
Each measurement data is connected to a data acquisition and analysis system 19 for real-time data monitoring and recording during the experiment.
Specifically, the method for carrying out the drying characteristic experiment by combining the experiment system comprises the following steps:
procedure A. Measurement of unequal arm coefficients of lever 10
Step one: let the length of the left arm of the lever 10 be L 1 The arm length on the right side is L 2 It is assumed that L is due to its unequal arm properties 1 ＜L 2 . Communication is carried out by means of the lifting platform 16The top of the electronic balance 15 is lifted to a position at which the bottom of the left tray 14 is balanced when the lever 10 is horizontal. Recording the indication of the communication electronic balance 15 at this time as m 0 Let the left tray 14 and the right tray 11 have the same mass and m t At this time, the two sides of the lever 10 can be known according to the moment balance:
step two: the left tray 14 and the right tray 11 are placed with the same mass m f Recording the number m of the communication electronic balance 15 at the moment 1 At this time, it is known from the moment balance that:
step three: the simultaneous solution of the formula (I) and the formula (II) can be obtained:
substituting formula (III) back into formula (I) yields a lever 10 having the following unequal arm coefficients:
step four: in the experimental process, when the indication of the communication electronic balance 15 is changed to deltax, the mass in the actual penetrating hot air drying chamber 7 is changed:
the formula (V) is led into a data acquisition and analysis system 19, and the indication change of the communication electronic balance 15 is corrected to the mass change in the actual penetrating hot air drying chamber 7.
Flow B: blank experiment
Step one: the penetrating hot air drying chamber 7 is placed on the right tray 11, at which time the right tray 11 is lowered onto the support platform 12 and the lever 10 is no longer in a horizontal position. The communication electronic balance 15 is cleared, and then the position of the lifting table 16 is adjusted, so that the communication electronic balance 15 is lifted to the balance position at the bottom of the left tray 14 when the lever 10 is horizontal.
Step two: the weight 13 is added to the left tray 14 until the lever 10 is restored to the horizontal level, at which point the data of the communication electronic balance 15 should be a very small positive value.
Step three: the temperature and humidity of hot air required by the experiment are confirmed, the parameters of the flowmeter 2 and the water quantity pumped by the constant flow pump 3 are adjusted, the temperatures of the evaporator 4 and the electric heater 5 are adjusted, the main control valve 6-1 is opened, the bypass control valve 6-3 is closed, hot air is introduced, and the data transmitted to the data acquisition and analysis system 19 by the thermocouple 8 and the humidity sensor 9 are confirmed to be consistent and stable with the preset experiment conditions. The data acquisition and analysis system 19 is used for monitoring whether the temperature and the humidity of the hot air are stable in the experimental process, recording the data change quantity of the communication electronic balance 15 in the experimental process, and making a mass change quantity graph in the penetrating type hot air drying chamber 7 after formula correction.
Scheme C: formal experiments
Step one: closing the main path control valve 6-1, opening the bypass control valve 6-3, placing the material to be tested in the penetrating type hot air drying chamber 7 after the penetrating type hot air drying chamber 7 is cooled, starting the tail gas incinerator 18, and repeating the flow B: and (3) in the blank experiment, obtaining a mass change amount graph in the penetrating type hot air drying chamber 7 after being corrected by the formula (V).
Step two: and superposing the curve graph obtained in the formal experiment with the curve graph obtained in the blank experiment to obtain a corrected material drying characteristic curve graph.
It will be appreciated by those skilled in the art that the invention can be practiced in other embodiments that depart from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects only and not restrictive, and all changes coming within the meaning and equivalency range of the invention are intended to be embraced therein.
Claims (10)
1. The device for measuring the drying characteristics of the hot air penetrating type material is characterized by comprising an air source (1), a constant flow pump (3), an evaporator (4), an electric heater (5), a high-temperature resistant air guide pipeline (6), a penetrating type hot air drying chamber (7), a lever (10), a right tray (11), a supporting platform (12), a counterweight (13), a left tray (14), a communication electronic balance (15), a lifting table (16), a tail gas incinerator (18) and a data acquisition and analysis system (19);
the air source (1) is connected with the flowmeter (2), the constant flow pump (3) is connected with a water source, and the flowmeter (2) and an outlet of the constant flow pump (3) are connected with an inlet of the evaporator (4) together; the outlet of the evaporator (4) is connected with the inlet of the electric heater (5); the outlet of the electric heater (5) is connected with the inlet (7-1) of the penetrating hot air drying chamber (7); the outlet (7-2) of the penetrating type hot air drying chamber (7) is connected with a tail gas incinerator (18), and the penetrating type hot air drying chamber (7) is arranged on the right tray (11); a supporting platform (12) is arranged below the right tray (11), and the right tray (11) is connected with the left tray (14) through a lever (10); a counterweight (13) is arranged on the left tray (14), and a communication electronic balance (15) is arranged below the left tray (14); a lifting table (16) is arranged below the communication electronic balance (15), and the communication electronic balance (15) is connected with a data acquisition and analysis system (19);
the pipeline that communicates between electric heater (5), penetrating hot air drying room (7) and tail gas incinerator (18) adopts high temperature resistant air guide pipeline (6), set up main way control valve (6-1) on high temperature resistant air guide pipeline (6) between the export of electric heater (5) and penetrating hot air drying room (7-1) entry, set up bypass pipeline (6-2) between the export of electric heater (5) and the entry of tail gas incinerator (18), set up bypass control valve (6-3) on bypass pipeline (6-2), bypass pipeline (6-2) adopt high temperature resistant air guide pipeline (6).
2. The device for measuring the drying characteristics of the hot air penetrating type material according to claim 1, further comprising a protective cover (17), wherein the penetrating type hot air drying chamber (7), the lever (10), the right tray (11), the supporting platform (12), the counterweight (13), the left tray (14), the communication electronic balance (15) and the lifting platform (16) are uniformly arranged in the protective cover (17).
3. The device for measuring the drying characteristics of hot air penetrating materials according to claim 1, wherein the high temperature resistant air guide pipelines (6) are flexible pipelines.
4. The device for measuring the drying characteristics of the hot air penetrating type material according to claim 1, wherein the penetrating type hot air drying chamber (7) comprises a shell, a heat-resistant heat-insulating material (7-5) is wrapped on the outer side of the shell, supporting feet (7-4) are arranged at the bottom of the shell, and a detachable screen plate (7-3) is arranged on the inner side of the penetrating type hot air drying chamber (7).
5. The device for measuring the drying characteristics of hot air penetrating type materials according to claim 1, wherein a thermocouple (8) and a humidity sensor (9) are installed in the penetrating type hot air drying chamber (7), and the thermocouple (8) and the humidity sensor (9) are connected with the data acquisition and analysis system (19).
6. The device for measuring the drying characteristics of hot air penetrating materials according to claim 1, wherein the weighing precision of the communication electronic balance (15) is not lower than 0.001g, and the communication electronic balance (15) transmits data to the data acquisition and analysis system (19) in real time when in use.
7. A method for measuring the drying characteristics of a hot air penetrating type material, based on the device for measuring the drying characteristics of a hot air penetrating type material according to any one of claims 1 to 6, characterized in that the measuring process comprises error correction, blank experiments and formal experiments, and specifically comprises the following steps:
step 1: obtaining a relational expression of the mass change quantity in the actual penetrating type hot air drying chamber (7) and the indication change quantity of the communication electronic balance (15) according to the unequal arm coefficients of the lever (10), and carrying out error correction according to the relational expression;
step 2: performing a blank experiment to obtain the indication variable quantity of the communication electronic balance (15), and making a mass variable quantity graph in the blank experiment penetrating type hot air drying chamber (7) according to the relation;
step 3: performing a formal experiment to obtain the indication variable quantity of the communication electronic balance (15), and making a mass variable quantity graph in the formal experiment penetrating type hot air drying chamber (7) according to the relation;
step 4: and superposing a mass variation curve graph in the formal experiment penetration type hot air drying chamber (7) and a mass variation curve graph in the blank experiment penetration type hot air drying chamber (7) to obtain a corrected material drying characteristic curve graph.
8. The method for measuring the drying characteristics of a through-air type material according to claim 7, wherein the step 1 comprises the steps of:
step 1.1: let the left arm length of the lever (10) be L 1 The length of the right arm is L 2 It is assumed that L is due to its unequal arm properties 1 >2, the top of the communication electronic level (15) is lifted to the bottom balance position of the left tray (14) when the lever (10) is lifted by the lifting table (16), and the indication of the communication electronic level (15) at the moment is recorded as m 0 The left tray (14) and the right tray (11) are provided with the same mass and m t At this time, the two side relations of the lever (10) are obtained according to the moment balance principle:
step 1.2: the left tray (14) and the right tray (11) are placed with the same mass m f Recording the indication m of the communication electronic balance (15) at the moment 1 At this time, according to the moment balance, the following is obtained:
step 1.3: the simultaneous formula (I) and the formula (II) are obtained:
substituting formula (III) into formula (I) to obtain the unequal arm coefficients of the lever (10):
at this time, in the formula (IV),
is the unequal arm coefficient of the lever (10);
step 1.4: when the indication change quantity of the communication electronic balance (15) is deltax, the mass change quantity in the actual penetrating type hot air drying chamber (7) is as follows:
in the formula (V), deltam is the mass change amount in the actual penetrating hot air drying chamber (7), L 1 Is the length of the left arm of the lever (10), L 2 The length of the right side arm of the lever (10) is the indication change quantity of the communication electronic balance (15).
9. The method for measuring drying characteristics of a through-air type material according to claim 7, wherein the step 2 comprises the following specific steps:
step 2.1: the penetrating type hot air drying chamber (7) is placed on the right tray (11), at the moment, the right tray (11) descends to the supporting platform (12), the lever (10) is not in a horizontal state any more, zero clearing operation is carried out on the communication electronic balance (15), and then the position of the lifting table (16) is adjusted, so that the communication electronic balance (15) is lifted to the balance position at the bottom of the left tray (14) when the lever (10) is horizontal;
step 2.2: adding a counterweight (13) into the left tray (14) until the lever (10) is restored to a horizontal state, wherein the data of the communication electronic balance (15) are extremely small positive values;
step 2.3: the temperature and humidity of hot air required by an experiment are confirmed, parameters of a flowmeter (2) and the water quantity pumped by a constant flow pump (3) are adjusted, the temperatures of an evaporator (4) and an electric heater (5) are adjusted, a main control valve (6-1) is opened, a bypass control valve (6-3) is closed, hot air is introduced, and data transmitted to a data acquisition and analysis system (19) by a thermocouple (7) and a humidity sensor (8) are confirmed to be consistent and stable with preset experiment conditions; the stability of the temperature and the humidity of the hot air in the experimental process is monitored through a data acquisition and analysis system (19), the data change quantity of the communication electronic balance (15) in the experimental process is recorded, and a mass change quantity curve graph in the penetrating type hot air drying chamber (7) of the blank experiment is made.
10. The method for measuring drying characteristics of a through-air type material according to claim 7 or 9, wherein the specific steps of step 3 include:
closing a main path control valve (6-1), opening a bypass control valve (6-3), placing the material to be tested in the penetrating type hot air drying chamber (7) after the penetrating type hot air drying chamber (7) is cooled, starting a tail gas incinerator (18), and repeating the step 2 to obtain a mass change quantity graph in the penetrating type hot air drying chamber (7) for formal experiments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310439050.9A CN116380710A (en) | 2023-04-21 | 2023-04-21 | Hot air penetrating type material drying characteristic measuring device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310439050.9A CN116380710A (en) | 2023-04-21 | 2023-04-21 | Hot air penetrating type material drying characteristic measuring device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116380710A true CN116380710A (en) | 2023-07-04 |
Family
ID=86963379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310439050.9A Pending CN116380710A (en) | 2023-04-21 | 2023-04-21 | Hot air penetrating type material drying characteristic measuring device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116380710A (en) |
-
2023
- 2023-04-21 CN CN202310439050.9A patent/CN116380710A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108007809B (en) | Rapid heating wide-range thermogravimetric analyzer | |
| CN102449461B (en) | Device for automatic in-line measurement of mass loss by calcination and thermal decomposition of solid particles | |
| CN103983748B (en) | A kind of active coke desulphurizing denitration performance characterization test method and device thereof | |
| CN104316430B (en) | Single-mold-cavity microwave thermogravimetric analysis system | |
| CN102353763A (en) | Small simulation device for testing spontaneous combustion period of coal | |
| CN206235585U (en) | A kind of coal sample heating and oxidation test device | |
| CN107421987B (en) | Device and method for measuring low-temperature oxidation heat generation rate of coal | |
| CN106124357A (en) | A kind of multi-functional coal sample heating and oxidation rule test platform of automatic sampling | |
| CN207408261U (en) | Big weight biomass block shaped fuel combustion characteristics test device | |
| CN110261579A (en) | A kind of automatic control ground wetting-drying test method and device | |
| CN104849167A (en) | Device for detecting isothermal adsorption and desorption of moisture of tobacco slice or cut tobacco biomass | |
| CN207516197U (en) | One kind is rapidly heated wide-range thermogravimetric analyzer | |
| CN116380710A (en) | Hot air penetrating type material drying characteristic measuring device and method | |
| CN106680417A (en) | Device and method for rapidly detecting ash content and heat value of coal | |
| CN214665640U (en) | High-capacity circulation heating and drying system | |
| CN112557240A (en) | Calibration device and method for flue gas humidity tester | |
| CN113237916A (en) | Device and method for measuring calorific value of hydrogen-mixed natural gas | |
| CN107449847A (en) | The chromatography of Period of Coal Seam Spontaneous Combustion symbolic gas and index preferably determine device | |
| CN114034629B (en) | Rock mass dry-wet circulation damage monitoring system and method in chemical corrosion environment | |
| CN205786414U (en) | A kind of bell-jar biomass microwave thermal decomposition test device | |
| CN207198105U (en) | The chromatography of Period of Coal Seam Spontaneous Combustion symbolic gas and index preferably determine device | |
| CN217879054U (en) | Detection apparatus for wet material drying crack resistance ability of SCR denitration catalyst | |
| CN107741379B (en) | Device and method for testing combustion characteristics of high-weight biomass briquette formed fuel | |
| CN114280216B (en) | Oil sand oil content determination method | |
| EP3724585B1 (en) | Thermal treatment apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |