CN209752237U - Evaporative crystallization device for experiment teaching - Google Patents
Evaporative crystallization device for experiment teaching Download PDFInfo
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- CN209752237U CN209752237U CN201920479523.7U CN201920479523U CN209752237U CN 209752237 U CN209752237 U CN 209752237U CN 201920479523 U CN201920479523 U CN 201920479523U CN 209752237 U CN209752237 U CN 209752237U
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Abstract
The utility model discloses an evaporation crystallization device for experiment teaching, including digital display heating agitating unit, be equipped with the support column on digital display heating agitating unit's the operation mesa, the upper portion of support column is equipped with the supporting disk, and the lower part of support column is equipped with the support heating dish, and the supporting disk is located the top that supports the heating dish, be equipped with raw material liquid storage tank on the supporting disk, raw material liquid storage tank passes through the raw material liquid access connection of raw material liquid output tube with the heat exchanger, and raw material liquid input tube and the sealed intercommunication of dropping liquid device are passed through in the raw material liquid export of heat exchanger, dropping liquid device and evaporation flask sealing. The experimental device has a simple structure and occupies a small space; the portable multifunctional demonstration device is convenient to freely assemble and disassemble, is convenient to carry, can be used for demonstration experiments, and can also be used as experimental laboratory experimental equipment; the experimental device does not need fluid conveying equipment, so that the equipment cost and the operation cost are saved; the purposes of energy saving and environmental protection are realized by adding the double-pipe heat exchanger.
Description
Technical Field
The utility model belongs to the technical field of the evaporation crystallization device that the experiment teaching was used, concretely relates to evaporation crystallization device is used in experiment teaching.
Background
The experimental teaching is an indispensable teaching link of essential basic courses such as chemical engineering principles, food engineering principles and the like of engineering major in colleges and universities. In order to improve the effect of experimental teaching, various novel experimental teaching devices have been designed and developed. A device for bernoulli equation experiment (a bernoulli equation demonstration instrument, chinese invention patent 2015, CN 104282203; self-circulation bernoulli equation tester, chinese utility model patent 2004, CN2729678), a device for centrifugal pump and resistance experiment (fluid flow resistance and flow measurement self-assembly experimental device, chinese utility model patent 2018, CN 207458435U; a visual experimental device for unsteady flow inside centrifugal pump, chinese invention patent 2014, CN103994082A), a device for rectification experiment (reaction rectification experimental device, chinese utility model patent 2018, CN 207614384U; a rectification experimental device, chinese utility model patent 2019, CN208356147U), a device for absorption experiment (packing absorption experimental device, chinese utility model patent 2019, CN208351774U), a device for fluidized bed drying experiment (fluidized bed drying experimental device, chinese utility model patent 2018, CN207457112U), etc. However, no experimental apparatus for evaporative crystallization has been reported so far.
Evaporative crystallization is one of the important contents of courses such as the chemical engineering principle, the food engineering principle and the like, is one of the most common unit operations in industrial production, and is widely applied to the fields of chemical industry, food processing, pesticides, pharmacy, wastewater treatment and the like. Due to the lack of experimental devices for experimental teaching, evaporative crystallization equipment in industrial production is usually displayed in a plane structure chart mode in the current teaching materials (Von \39561foodengineering principle, general high education 'fifteen' national level planning teaching materials, Beijing: China light industry publisher 2016:240 plus 244; Chengningjungdzi, etc. chemical engineering principle, general high education 'fifteen' national level planning teaching materials, Beijing: chemical industry publisher 2006:185 plus 192.), the method is lack of three-dimensional property and cannot describe the whole dynamic process of evaporative crystallization, the space structure, the working process and the working principle of the equipment generally need students to take the space imagination, and the teaching effect is poor. The dynamic picture of the central circulating tube evaporator manufactured by Zhongshan university describes the dynamic process of the evaporation process, and plays a great help for improving the teaching effect, but the dynamic picture about evaporative crystallization is still rare, and the dynamic picture still cannot describe the space structure of the equipment in detail, so that the purpose of enabling students to understand the principle and operation of the whole process deeply is difficult to achieve through explanation of the equipment structure.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides an evaporation crystallization device for experiment teaching, simple structure, the practicality is strong.
In order to solve the technical problem, the utility model discloses a following technical scheme:
The utility model provides an evaporation crystallization device for experiment teaching, includes digital display heating agitating unit, be equipped with the support column on digital display heating agitating unit's the operation mesa, the upper portion of support column is equipped with the supporting disk, and the lower part of support column is equipped with the support heating dish, and the supporting disk is located the top that supports the heating dish, be equipped with the raw material liquid storage tank on the supporting disk, raw material liquid storage tank passes through raw material liquid output tube and double pipe heat exchanger's raw material liquid import sealing connection, and double pipe heat exchanger's raw material liquid export is through raw material liquid input tube and the sealed intercommunication of dropping liquid device, dropping liquid.
The evaporation bottle is provided with three branch ports, wherein a branch port I is a concentrated solution overflow port, a branch port II is a preheated raw material solution feeding port, a branch port III is a secondary steam outlet, a concentrated solution collecting and crystallizing device is arranged right below the concentrated solution overflow port, and the concentrated solution collecting and crystallizing device is positioned on an operation table board; and a liquid dropping device is arranged on the branch port II.
The dropping liquid device is from last to being equipped with feed liquor pipe, holding cavity, dropping liquid switch knob and dropping liquid pipe down in proper order, raw materials liquid input tube and dropping liquid device's the sealed intercommunication of feed liquor pipe, dropping liquid device's dropping liquid pipe with the sealed intercommunication of a mouthful two of evaporating flask.
the evaporative crystallization device further comprises an H-shaped pipe, wherein the H-shaped pipe is composed of a left branch pipe, a right branch pipe and a communicating pipe of the left branch pipe and the right branch pipe, the lower end of the left branch pipe is communicated with a secondary steam outlet of the evaporation bottle, a thermometer is arranged at the upper end of the left branch pipe and is positioned in a thermometer sleeve, the outer diameter of the thermometer sleeve is matched with the caliber of the upper end of the left branch pipe, the upper end of the right branch pipe is connected with a sleeve type heat exchanger, a condensate switch knob is arranged at the lower end of the right branch pipe, and the communicating pipe of the left branch.
The shell side of the double-pipe heat exchanger is raw material liquid, a raw material liquid input pipe and a raw material liquid output pipe are communicated with the shell side of the double-pipe heat exchanger, the pipe side of the double-pipe heat exchanger is secondary steam, and the upper end of the right branch pipe of the H-shaped pipe is communicated with the pipe side of the heat exchanger.
The evaporative crystallization device further comprises a condensate receiving device, and the condensate receiving device is located right below the right branch pipe of the H-shaped pipe.
The position that the output tube is close to the heat exchanger is equipped with temperature sensor I, the position that the input tube is close to the heat exchanger is equipped with temperature sensor II, and temperature sensor I and temperature sensor II are connected with digital display heating agitating unit.
And a temperature display I and a temperature display II are arranged on a control panel of the digital display heating and stirring device, and the temperature sensor I and the temperature sensor II are respectively electrically connected with the temperature display I and the temperature display II.
still be equipped with voltage indicator table, pilot lamp, stirring speed adjust knob and switch on digital display heating agitating unit's the control panel, voltage indicator table, pilot lamp, stirring speed adjust knob and switch electrical connection, support heating plate and digital display heating agitating unit electrical connection.
The utility model has the advantages that: 1. the experimental device has a simple structure and occupies a small space; 2. the portable multifunctional demonstration device is convenient to freely assemble and disassemble, is convenient to carry, can be used for demonstration experiments, and can also be used as experimental laboratory experimental equipment; 3. the experimental device has low production cost and is beneficial to popularization and use; 4. the experimental device does not need fluid conveying equipment, so that the equipment cost and the operation cost are saved; 5. the purposes of energy saving and environmental protection are realized by adding the double-pipe heat exchanger, and whether the heat exchanger is added or not is used for students to deeply understand how to realize the energy saving in the process through equipment design in the evaporative crystallization process; 6. the main body of the experimental device is made of glass, and the phenomena are obviously contrasted; 7. the raw materials can be recycled, so that the aim of saving the raw materials is fulfilled; 8. the material balance and the energy balance in the evaporative crystallization process can be designed through flow data and temperature, so that the understanding of students on the evaporative crystallization process is deepened; 9. simple operation, environmental protection and no pollution.
Drawings
FIG. 1 is a schematic structural diagram of the present invention, 1, a temperature sensor connecting wire, 2, a power line, 3, a power switch, 4, an indicator light, 5, a stirring speed adjusting knob, 6, a voltage indicator, 7, temperature indicators I, 8, temperature indicators II, 9, a digital display heating and stirring device, 10, a concentrated solution collecting and crystallizing device, 11, a supporting heating plate, 12, a dropping device, 13, a dropping switch knob, 14, a dropping funnel containing cavity, 15, raw material liquid input pipe, 16, a support plate, 17, a raw material liquid storage tank, 19, a support column, 20, a raw material liquid output pipe, 21, temperature sensors II and 22, a double-pipe heat exchanger, 23, temperature sensors I and 24, a three-way valve, 25, a thermometer, 26, a thermometer sleeve, 27, an H-shaped pipe, 28, a condensate switch knob, 29, an evaporation bottle, 30 and a condensate receiving device.
Detailed Description
the present invention will be further described with reference to the following specific embodiments. It is to be understood that the following examples are illustrative only and are not intended to limit the scope of the invention, and that various modifications and changes in no way essential to those skilled in the art can be made in the light of the above teachings.
Example 1
As shown in fig. 1, an evaporation crystallization device for experimental teaching, including digital display heating agitating unit 9, be equipped with support column 19 on digital display heating agitating unit's the operation mesa, the upper portion of support column 19 is equipped with supporting disk 16, and the lower part of support column 19 is equipped with supports heating disk 11, and supporting disk 16 is located the top that supports heating disk 11, be equipped with raw material liquid storage tank 17 on the supporting disk 16, raw material liquid storage tank 17 passes through raw material liquid output tube 20 and telescopic heat exchanger 22's raw material liquid import sealing connection, and telescopic heat exchanger 22's raw material liquid export is through raw material liquid input tube 15 and evaporation bottle 29 sealing connection, and wherein telescopic heat exchanger 22's raw material liquid export is through input tube 15 and dropping liquid device 12 sealing connection, dropping liquid device 12 and evaporation bottle 29 sealing connection.
Preferably, the evaporation bottle 29 is provided with three branch ports, the first branch port is a concentrated solution overflow port, the second branch port is a preheated raw material solution feeding port, the third branch port is a secondary steam outlet, a concentrated solution collecting and crystallizing device 10 is arranged right below the concentrated solution overflow port, on one hand, the overflowed concentrated solution is collected, on the other hand, the concentrated solution is gradually cooled and crystallized in a container, and the concentrated solution collecting and crystallizing device 10 is positioned on an operation table board; the concentrated solution collecting and crystallizing device 10 can be a beaker, a conical flask and the like, is made of glass or plastic and the like, and is open to observe the crystal precipitation process. And a dropping device 12 is arranged on the branch port II, and the raw material liquid input pipe 15 is communicated with the dropping device 12 in a sealing way.
preferably, dropping liquid device 12 is from last to being equipped with feed liquor pipe, holding cavity 14, dropping liquid switch knob 13 and dropping liquid pipe down in proper order, raw material liquid input tube 15 and dropping liquid device 12's feed liquor pipe seal intercommunication, dropping liquid device 12's dropping liquid pipe with evaporation bottle 29's a mouthful two seal intercommunication.
Preferably, the raw material liquid input pipe 15 may adopt a rubber pipe or a combination of a rubber pipe and a glass pipe, preferably a rubber pipe, one end of the raw material liquid input pipe 15 is connected with a raw material liquid outlet of the heat exchanger, and the other end of the raw material liquid input pipe 15 may be directly connected to a liquid inlet pipe of the liquid dropping device; when the raw material liquid input tube 15 can adopt a rubber tube or a combination of the rubber tube and a glass tube, the glass tube can be inserted through a rubber plug which is inserted into an inlet at the upper end of a liquid inlet tube of the dropping device; if the dropping liquid pipe is a straight glass pipe, the dropping liquid pipe can be connected to a branch opening II of the evaporation bottle through a thermometer sleeve; a rubber plug can be inserted and connected with the branch port II; still can directly grind the mouth at the design of dropping liquid pipe lower extreme, the bore size agrees with mutually with two bore sizes of evaporating flask branch mouth to guarantee the sealed intercommunication of dropping liquid device and evaporating flask, the feed liquor pipe of dropping liquid device, hold the chamber body 14, dropping liquid switch knob 13, dropping liquid pipe design as an organic whole.
preferably, the evaporative crystallization device further comprises an H-shaped pipe 27, wherein the H-shaped pipe 27 is composed of a left branch pipe, a right branch pipe and a communicating pipe of the left branch pipe and the right branch pipe, and the communicating pipe of the left branch pipe and the right branch pipe of the H-shaped pipe is inclined downwards by a certain angle (5-10 degrees). The lower end of the left branch pipe is communicated with a branch port III of the evaporation bottle 29, namely a secondary steam outlet, the upper end of the left branch pipe is provided with a thermometer 25, the thermometer 25 is positioned in a thermometer sleeve 26, the outer diameter of the thermometer sleeve 26 is matched with the caliber of the upper end of the left branch pipe, the upper end of the right branch pipe is connected with the double-pipe heat exchanger 22, and the lower end of the right branch pipe is provided with a condensate switch knob 28. Specifically, the lower end of the left branch pipe of the H-shaped pipe is arranged on a branch port III of the evaporation bottle, the caliber of the branch port III can be 14 mouths, 19 mouths, 24 mouths and the like, and the caliber of the lower end of the left branch pipe of the H-shaped pipe is matched with the calibers of the branch port III; the caliber of the left branch pipe can be 14, 19, 24 and the like, if the third branch port is a ground port, the left branch pipe can be directly connected with a thermometer sleeve pipe, the caliber of the lower end of the thermometer sleeve pipe is matched with the caliber of the upper port of the left branch pipe of the H-shaped pipe, and a thermometer is arranged on the thermometer sleeve pipe to measure the temperature of secondary steam; if not, the thermometer can be inserted into the rubber plug, and the rubber plug is installed on the upper part of the left branch pipe of the H-shaped pipe, so that the thermometer is connected with the left branch pipe of the H-shaped pipe. A condensate switch knob 28 is arranged at the lower end of a right branch pipe of the H-shaped pipe, secondary steam is controlled to flow into the condensate receiving device through the condensate switch after being cooled, the upper end of the right branch pipe is connected with the double-pipe heat exchanger 22, and the caliber of the upper end of the right branch pipe is matched with the caliber of the lower end of an inner pipe of the double-pipe heat exchanger.
The shell side of the double-pipe heat exchanger 22 is raw material liquid, the input pipe 15 and the output pipe 20 are communicated with the shell side of the double-pipe heat exchanger, the pipe side of the double-pipe heat exchanger is secondary steam, and the upper end of the right branch pipe of the H-shaped pipe 27 is communicated with the pipe side of the double-pipe heat exchanger. The inner tube of the double-tube heat exchanger (tube pass) can be selected from snake-shaped, spherical and straight shapes. The lower end of the inner pipe of the double-pipe heat exchanger is a preferred ground, the caliber size can be 14, 19, 24 and the like, and the lower end of the inner pipe is matched with the caliber of the upper end of the right branch pipe of the H-shaped pipe; the upper port of the inner pipe of the double-pipe heat exchanger can be directly communicated with the atmosphere, connected with a condenser and introduced into wastewater; the outer tube (shell side) is preferably a circular straight tube.
The evaporative crystallization device further comprises a condensate receiving device 30, the condensate receiving device is located right below the right branch pipe of the H-shaped pipe and receives the cooled solvent, the condensate receiving device 30 can be a beaker, a conical flask and the like, and the materials can be glass or plastics and the like.
a temperature sensor I23 is arranged at a position, close to the heat exchanger, of the raw material liquid output pipe 20, specifically, a three-way valve 24 is arranged at a position, close to the heat exchanger, of the raw material liquid output pipe 20, the temperature sensor I23 is located in the three-way valve 24, a temperature sensor II 21 is arranged at a position, close to the heat exchanger, of the input pipe, and the temperature sensor I and the temperature sensor II are connected with the digital display heating and stirring device 9; be equipped with temperature monitor I7 and temperature monitor II 8 on digital display heating agitating unit's the control panel, temperature sensor I and temperature sensor II respectively with temperature monitor I and II electrical connection of temperature monitor. The temperature sensor I and the temperature sensor II detect the temperature change of the raw material liquid before and after preheating.
Still be equipped with voltage indicator 6, pilot lamp 4, stirring speed adjust knob 5 and switch 3 on digital display heating agitating unit 9's the control panel, voltage indicator, pilot lamp, stirring speed adjust knob and switch electrical connection, support heating plate 11 and digital display heating agitating unit electrical connection. The digital display heating and stirring device is also provided with a power cord 2, a connecting wire (not shown in the figure) for supporting the heating disc and a connecting wire 1 for the temperature sensor, and the power cord is connected with a power supply; the temperature sensor connecting wire is connected with the temperature sensor I and the temperature sensor II respectively, the inlet and outlet temperatures of the raw material liquid are displayed, and the supporting heating plate connecting wire is connected to the supporting heating plate to heat the evaporator.
the preferred glass material of raw materials liquid storage tank and dropping liquid device is equipped with the scale mark on the raw materials liquid storage tank.
The solution which can be crystallized by evaporation can be an inorganic salt solution, preferably a copper sulfate solution.
the utility model discloses a use method as follows:
adding sufficient copper sulfate solution into a raw material liquid storage tank 17, adding a certain amount of anhydrous copper sulfate solution into a cavity 14 of a dropping device 12 and an evaporation bottle 29, simultaneously adding adaptive stirring magnetons into the evaporation bottle, inserting a raw material liquid output pipe 20 into the copper sulfate solution, aligning a suction ball with a raw material liquid input pipe connected with a liquid inlet pipe at the upper end of the dropping device for suction, enabling the raw material liquid to flow into a sleeve type heat exchanger, then plugging a rubber plug, enabling the rubber plug to seal the upper end of the dropping device (the raw material liquid input pipe 15 adopts a combination of a rubber pipe and a glass pipe, inserting the glass pipe into the rubber plug, inserting the rubber plug into an inlet at the upper end of the liquid inlet pipe of the dropping device), opening a dropping switch knob at the lower end of the dropping device, enabling liquid to drop into the evaporation bottle from the lower end of the dropping pipe, and reducing the pressure above the liquid level along, and the pressure intensity above the liquid level of the raw material liquid storage tank is unchanged, and the raw material liquid automatically flows into the cavity and keeps balance with the dripping speed. And (3) turning on the heating and stirring device, adjusting the heating and stirring knob, heating and stirring, wherein secondary steam enters the energy-saving and preheating device along with the boiling of the liquid in the evaporation bottle, is changed into liquid under the cooling of the raw material liquid, and flows into the receiving bottle. When the concentrated solution in the evaporation bottle meets the requirement, the concentrated solution is collected and received by the crystallization device (the concentrated solution which is just received is abandoned at first, and the receiving is started when the whole evaporation crystallization process is stable), the temperature of the finished solution is gradually reduced in the room temperature environment, and crystals are separated out.
According to the reduction quantity delta V of the raw material liquid in the raw material liquid storage tank in the time t, the volume flow is solved by using the following formula:
The total energy required to be provided to complete the evaporative crystallization process can be solved using the following equation:
Q＝ρqVcpc(t2-t1)，
Wherein: ρ and cpcRespectively refer to the density and specific heat capacity of the raw material liquid at the characteristic temperature;
The characteristic temperature can be calculated according to the temperature of the raw material liquid and the average temperature of the finished liquid temperature;
t2And t1Respectively indicating the temperature of the raw material liquid and the temperature of the finishing liquid;
The temperature of the raw material liquid and the temperature of the finishing liquid can be directly measured with a thermometer.
The energy that can be saved during the evaporative crystallization process due to the design of the preheating and energy-saving device can be calculated according to the following formula:
Q′＝ρqVCpc(t2′-t1′)
Wherein: ρ and cpcRespectively refer to the density and specific heat capacity of the raw material liquid at the characteristic temperature;
The characteristic temperature can be calculated according to the average temperature of the raw material liquid before and after entering the energy-saving and preheating device;
t2' and t1' respectively refers to the temperature of the raw material liquid before and after the energy-saving and preheating device;
The temperature of the raw material liquid before and after entering and exiting the energy-saving and preheating device can be displayed by a temperature display on the digital display heating and stirring device.
The energy saving efficiency can be calculated according to the following formula:
The temperature differential loss during evaporation can be calculated according to the following formula:
Δt＝t2-t′
Wherein: t is t2The temperature of the finishing liquid, measurable by a thermometer
t' is the temperature of the secondary steam and can be measured by a thermometer on the branch pipe at the left upper end of the H-shaped pipe.
The basic principles and main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides an evaporation crystallization device for experiment teaching, includes digital display heating agitating unit (9), its characterized in that: be equipped with support column (19) on digital display heating agitating unit's the operation mesa, the upper portion of support column (19) is equipped with supporting disk (16), and the lower part of support column (19) is equipped with supports heating plate (11), and supporting disk (16) are located the top that supports heating plate (11), be equipped with raw material liquid storage tank (17) on supporting disk (16), raw material liquid storage tank (17) are through raw material liquid output tube (20) and the raw material liquid access connection of double pipe heat exchanger (22), and the raw material liquid export of double pipe heat exchanger (22) is through raw material liquid input tube (15) and dropping liquid device (12) sealed intercommunication, dropping liquid device (12) and evaporating flask (29) sealed connection.
2. the evaporative crystallization apparatus for experimental teaching as claimed in claim 1, wherein: the evaporation bottle (29) is provided with three branch openings, wherein the first branch opening is a concentrated solution overflow opening, the second branch opening is a preheated raw material solution feeding opening, the third branch opening is a secondary steam outlet, a concentrated solution collecting and crystallizing device (10) is arranged right below the concentrated solution overflow opening, and the concentrated solution collecting and crystallizing device (10) is positioned on an operation table board; and a dropping device (12) is arranged on the branch port II.
3. The evaporative crystallization apparatus for experimental teaching as claimed in claim 2, wherein: dropping liquid device (12) are from last to being equipped with feed liquor pipe, appearance cavity (14), dropping liquid switch knob (13) and dropping liquid pipe down in proper order, the sealed intercommunication of feed liquor pipe of raw materials liquid input tube (15) and dropping liquid device (12), the dropping liquid pipe of dropping liquid device (12) with the sealed intercommunication of a mouthful two of evaporating flask (29).
4. The evaporative crystallization apparatus for experimental teaching as claimed in claim 2, wherein: the evaporative crystallization device further comprises an H-shaped pipe (27), wherein the H-shaped pipe (27) is composed of a left branch pipe, a right branch pipe and a communicating pipe of the left branch pipe and the right branch pipe, the lower end of the left branch pipe is communicated with a secondary steam outlet of the evaporation bottle, a thermometer (25) is arranged at the upper end of the left branch pipe, the thermometer (25) is located in a thermometer sleeve (26), the outer diameter of the thermometer sleeve (26) is matched with the upper end caliber of the left branch pipe, the upper end of the right branch pipe is connected with a sleeve type heat exchanger (22), a condensate switch knob (28) is arranged at the lower end of the right branch pipe, and the communicating pipe of the left branch pipe and.
5. The evaporative crystallization apparatus for experimental teaching as claimed in claim 4, wherein: the shell side of the double-pipe heat exchanger (22) is raw material liquid, a raw material liquid input pipe (15) and a raw material liquid output pipe (20) are communicated with the shell side of the double-pipe heat exchanger (22), the pipe side of the double-pipe heat exchanger (22) is secondary steam, and the upper end of the right branch pipe of the H-shaped pipe (27) is communicated with the pipe side of the double-pipe heat exchanger (22).
6. The evaporative crystallization apparatus for experimental teaching as claimed in any one of claims 4 or 5, wherein: the evaporative crystallization device further comprises a condensate receiving device (30), and the condensate receiving device (30) is located right below the right branch pipe of the H-shaped pipe (27).
7. The evaporative crystallization apparatus for experimental teaching as claimed in claim 1, wherein: the position that raw materials liquid output tube (20) is close to double-pipe heat exchanger (22) is equipped with temperature sensor I (23), the position that raw materials liquid input tube (15) are close to double-pipe heat exchanger (22) is equipped with temperature sensor II (21), and temperature sensor I (23) and temperature sensor II (21) are connected with digital display heating agitating unit (9).
8. the evaporative crystallization apparatus for experimental teaching as claimed in claim 7, wherein: be equipped with temperature display I (7) and temperature display II (8) on digital display heating agitating unit's (9) control panel, temperature sensor I (23) and temperature sensor II (21) respectively with temperature display I and II electrical connection of temperature display.
9. the evaporative crystallization apparatus for experimental teaching as claimed in claim 8, wherein: still be equipped with voltage indicator (6), pilot lamp (4), stirring speed adjust knob (5) and switch (3) on the control panel of digital display heating agitating unit (9), voltage indicator, pilot lamp, stirring speed adjust knob and switch electrical connection, support heating plate (11) and digital display heating agitating unit (9) electrical connection.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109847401A (en) * | 2019-04-10 | 2019-06-07 | 郑州轻工业学院 | Experimental teaching evaporated crystallization device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109847401A (en) * | 2019-04-10 | 2019-06-07 | 郑州轻工业学院 | Experimental teaching evaporated crystallization device |
| CN109847401B (en) * | 2019-04-10 | 2024-03-08 | 郑州轻工业学院 | Evaporation crystallization device for experimental teaching |
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