CN112344309B - Steam boiler capable of switching heating components based on time and temperature difference - Google Patents

Steam boiler capable of switching heating components based on time and temperature difference Download PDF

Info

Publication number
CN112344309B
CN112344309B CN201910825366.5A CN201910825366A CN112344309B CN 112344309 B CN112344309 B CN 112344309B CN 201910825366 A CN201910825366 A CN 201910825366A CN 112344309 B CN112344309 B CN 112344309B
Authority
CN
China
Prior art keywords
electric heater
temperature
heating
data
heat
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.)
Active
Application number
CN201910825366.5A
Other languages
Chinese (zh)
Other versions
CN112344309A (en
Inventor
麻晓飞
陈燕慧
刘治彩
张爱云
高永强
沈保山
吴芷红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Jiaotong University
Linyi University
Original Assignee
Shandong Jiaotong University
Linyi University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shandong Jiaotong University, Linyi University filed Critical Shandong Jiaotong University
Priority to CN201910825366.5A priority Critical patent/CN112344309B/en
Publication of CN112344309A publication Critical patent/CN112344309A/en
Application granted granted Critical
Publication of CN112344309B publication Critical patent/CN112344309B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
    • F22B37/46—Applications, arrangements, or dispositions of alarm or automatic safety devices responsive to low or high water level, e.g. for checking, suppressing, extinguishing combustion in boilers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

The invention provides a steam boiler capable of switching heating components based on time-temperature difference, which comprises an electric heating device and a steam drum, wherein a first temperature sensor and a second temperature sensor are respectively arranged in a first pipe box and a second pipe box, the first temperature sensor and the second temperature sensor are in data connection with a controller, the controller extracts temperature data of the first temperature sensor or the second temperature sensor according to a time sequence, the temperature difference or the accumulation of temperature difference changes is obtained through the comparison of the temperature data of adjacent time periods, and when the temperature difference or the temperature difference changes are lower than a threshold value, the controller controls a first electric heater and a second electric heater to alternately heat. The boiler judges the stable state of the fluid according to the temperature difference or the accumulation of the temperature difference change, so that the result is more accurate, and the problem of error increase caused by aging due to the problem of operation time is solved.

Description

Steam boiler capable of switching heating components based on time and temperature difference
Technical Field
The invention relates to steam generation equipment, in particular to an intermittent vibration descaling boiler.
Background
Boilers are mechanical devices that use the heat energy of fuel or other energy sources to heat water into steam. The steam generator has wide application field and is widely applied to places such as clothing factories, dry cleaning shops, restaurants, bunkers, canteens, restaurants, factories and mines, bean product factories and the like. In applicant's prior application, a new coil type electric heating coil, such as CN106123306A, was developed and studied to vibrate the elastic tube bundle due to the expansion of the fluid therein caused by heating, thereby achieving heating and descaling effects.
However, in applications where it is found that continuous heating of the electric heater results in fluid stability of the internal electric heating means, i.e. the fluid is not flowing or is flowing very little, or the flow is stable, the vibration performance of the coil is greatly reduced, and thus the efficiency of the coil for descaling and heating is affected.
In the prior application, referring to fig. 6, the coil is vibrated by intermittent heating, but the intermittent heating may result in heating failure for a period of time, resulting in a reduction in heating power. Therefore, the invention is improved, adopts a more reasonable heating mode and improves the heating efficiency.
However, in the application, it is found that the continuous heating of the electric heater can cause the fluid of the internal electric heating device to form stability, i.e. the fluid does not flow or flows little, or the flow is stable, so that the vibration performance of the coil is greatly weakened, thereby affecting the descaling of the coil and the heating efficiency, and for this reason, the inventor researches and develops a new water heater capable of generating periodic or temperature pressure vibration, and has already made patent application.
However, in practice it has been found that by varying the vibration of the tube bundle either constantly or periodically in dependence on the temperature and pressure, hysteresis can occur and the cycle can be too long or too short. Therefore, the invention improves the previous application and intelligently controls the vibration, so that the fluid in the fluid can realize frequent vibration, and good descaling and heating effects can be realized.
Disclosure of Invention
The invention provides an electric heating boiler with a novel heating device, aiming at the defects of a steam boiler in the prior art. The boiler can improve the heating efficiency, thereby realizing good descaling and heating effects.
In order to achieve the purpose, the invention adopts the following technical scheme:
a steam boiler based on time-temperature difference switching heating components comprises an electric heating device and a steam drum, wherein the electric heating device is arranged in the steam drum, the steam drum comprises a water inlet pipe and a steam outlet, the electric heating device comprises a first pipe box, a second pipe box and a coil pipe, the coil pipe is communicated with the first pipe box and the second pipe box to form closed circulation of heating fluid, and an electric heater is arranged in the first pipe box; the number of the coil pipes is one or more, each coil pipe comprises a plurality of arc-shaped pipe bundles, the central lines of the arc-shaped pipe bundles are arcs taking the first pipe box as a concentric circle, and the end parts of the adjacent pipe bundles are communicated, so that the end parts of the pipe bundles form free ends of the pipe bundles; a first electric heater and a second electric heater are respectively arranged in the first channel box and the second channel box; filling phase-change fluid in the first channel and/or the second channel; the temperature control system is characterized in that a first temperature sensor and a second temperature sensor are respectively arranged in the first channel box and the second channel box and used for detecting the temperature in the first channel box and the second channel box, the first temperature sensor and the second temperature sensor are in data connection with a controller, the controller extracts the temperature data of the first temperature sensor or the second temperature sensor according to a time sequence, the temperature difference or the accumulation of the temperature difference change is obtained through the comparison of the temperature data of adjacent time periods, and when the temperature difference or the temperature difference change is lower than a threshold value, the controller controls the first electric heater and the second electric heater to heat alternately.
Preferably, when the first electric heater performs heating and the second electric heater does not perform heating, the temperature detected by the first temperature sensing element is T1 if the temperature of the previous time period is T2 and the temperature of the adjacent subsequent time period is T2, and if T1< T2, the temperature is lower than a threshold value, the controller controls the first electric heater to stop heating and the second electric heater to perform heating; if T1> T2, the controller controls the first electric heater to heat and the second electric heater not to heat when the temperature is lower than the threshold value;
when the second electric heater heats and the first electric heater does not heat, the temperature detected by the second temperature sensing element is T1 if the temperature of the previous time period is T2 and the temperature of the adjacent subsequent time period is T2, and if T1 is less than T2 and is lower than the threshold value, the controller controls the second electric heater to stop heating and the first electric heater to heat; if T1> T2, the controller controls the second electric heater to heat and the first electric heater to not heat when the threshold value is lower.
Preferably, when the first electric heater performs heating and the second electric heater does not perform heating, if the temperature of the first temperature sensor in the preceding period is T1 and the temperature of the adjacent following period is T2, if T1 is T2, the heating is judged according to the following conditions:
if the temperature T1 is higher than the temperature of the first data and is lower than the threshold value, the controller controls the first electric heater to stop heating and the second electric heater to heat; wherein the first data is greater than the temperature of the phase change fluid after the phase change; if the temperature of the T1 is less than or equal to the temperature of the second data, the temperature is lower than a threshold value, the controller controls the first electric heater to heat, and the second electric heater does not heat;
when the second electric heater is heating and the first electric heater is not heating, if the temperature of the second temperature sensor in the previous time period is T1 and the temperature of the second temperature sensor in the next subsequent time period is T2, if T1 is T2, the heating is judged according to the following conditions:
if the temperature T1 is higher than the temperature of the first data and is lower than the threshold value, the controller controls the second electric heater to stop heating, and the first electric heater carries out heating; if the temperature of the T1 is less than or equal to the temperature of the second data, the temperature is lower than the threshold value, the controller controls the second electric heater to heat, and the first electric heater does not heat;
the first data is temperature data of a sufficiently heated state, and the second data is temperature data of no heating or temperature data of the beginning of heating.
The invention has the following advantages:
1. the electric heating device can judge that the evaporation of the internal fluid is basically saturated and the volume of the internal fluid is not changed greatly according to the temperature difference of the previous time period and the next time period detected by the temperature sensing element or the accumulated temperature difference, under the condition, the internal fluid is relatively stable, the vibration of the tube bundle is poor, and therefore adjustment is needed to be carried out to vibrate the internal fluid, so that the heating parts are switched, and the flowing directions of the fluids are opposite. So that the fluid undergoes a flow change to thereby effect vibration. The stable state of the fluid is judged according to the temperature difference or the accumulation of the temperature difference change, so that the result is more accurate, and the problem of error increase caused by aging due to the problem of operation time is solved.
2. The invention designs a layout of an electric heating device with a novel structure in a steam drum, which can further improve the heating efficiency.
3. The invention increases the heating power of the coil pipe periodically and continuously and reduces the heating power, so that the heated fluid can generate the volume which is continuously in a changing state after being heated, and the free end of the coil pipe is induced to generate vibration, thereby strengthening heat transfer.
4. The invention optimizes the optimal relationship of the parameters of the coil pipe through a large amount of experiments and numerical simulation, thereby realizing the optimal heating efficiency.
Description of the drawings:
fig. 1 is a top view of an electric heating apparatus of the present invention.
Fig. 2 is a front view of the electric heating apparatus.
Fig. 3 is a schematic layout of an electric heating device arranged in a circular steam drum.
Fig. 4 is a schematic diagram of the coil arrangement.
Fig. 5 is a schematic view of a steam drum structure.
Fig. 6 is a background art drawing.
Fig. 7 is a control flow diagram.
In the figure: 1. coil pipe, 2, first pipe box, 3, free end, 4, free end, 5, inlet tube, 6, steam outlet, 7, free end, 8, second pipe box, 9, connecting point, 10, electric heating device, 11, steam pocket, 12 pipe bundles, 13 electric heater.
Detailed Description
A boiler comprising an electric heating device 10, a steam drum 11, said electric heating device 10 being arranged in the steam drum 11, said steam drum 11 comprising a water inlet tube 5 and a steam outlet 6. The steam outlet 6 is arranged at the upper part of the steam drum.
Preferably, the steam drum is of cylindrical construction.
Fig. 1 shows a top view of an electric heating apparatus 10, as shown in fig. 1, the electric heating apparatus 10 includes a first pipe box 2, a second pipe box 8 and a coil 1, the coil 1 is communicated with the first pipe box 2 and the second pipe box 8, a fluid circulates in the first pipe box 2, the second pipe box 8 and the coil 1 in a closed manner, electric heaters 131, 132 are disposed in the electric heating apparatus 10, and the electric heater 13 is used for heating the fluid in the electric heating apparatus 10 and then heating water in a steam drum by the heated fluid.
As shown in fig. 1-2, a first electric heater 131 and a second electric heater 132 are provided in the first and second header tanks 2 and 8, respectively; the first channel box 2 and/or the second channel box 8 are filled with phase-change fluid; the number of the coil pipes 1 is one or more, each coil pipe 1 comprises a plurality of circular arc-shaped pipe bundles 12, the central lines of the circular arc-shaped pipe bundles 12 are circular arcs taking the first pipe box 2 as a concentric circle, the end parts of the adjacent pipe bundles 12 are communicated, and fluid forms serial flow between the first pipe box 2 and the second pipe box 8, so that the end parts of the pipe bundles form free ends 3 and 4 of the pipe bundles; the fluid is phase-change fluid, vapor-liquid phase-change liquid, the first electric heater 131 and the second electric heater 132 are in data connection with a controller, and the controller controls the first electric heater 131 and the second electric heater 132 to switch heating.
Preferably, the first and second headers 2 and 8 are provided along a height direction.
It has been found in research and practice that continuous power-stable heating of the electric heater results in a stable fluid formation of the internal electric heating means, i.e. the fluid is not flowing or has little fluidity, or the flow is stable, resulting in a greatly reduced vibrational performance of the coil 1, thereby affecting the efficiency of descaling and heating of the coil 1. There is therefore a need for an improvement to the electrical heating coil described above as follows.
In the inventor's prior application, a periodic heating manner is proposed, in which the electric heaters 131 and 132 in the first and second tube boxes are continuously switched to heat by the periodic heating manner, so as to continuously promote the vibration of the coil, thereby improving the heating efficiency and the descaling effect. However, adjusting the vibration of the tube bundle with a fixed periodic variation can lead to hysteresis and too long or too short a period. Therefore, the invention improves the previous application and intelligently controls the vibration, so that the fluid in the fluid can realize frequent vibration, and good descaling and heating effects can be realized.
Aiming at the defects in the technology researched in the prior art, the invention provides a novel electric heating boiler capable of intelligently controlling vibration. The boiler can improve the heating efficiency, thereby realizing good descaling and heating effects.
Vibration adjustment by automatically switching heating components based on pressure difference
Preferably, the first and second pressure sensors are respectively disposed in the first and second tube boxes 2 and 8 to detect pressures in the first and second tube boxes, the first and second pressure sensors are in data connection with the controller, the controller extracts pressure data of the first and second pressure sensors measured according to a time sequence, compares pressure data of adjacent time periods to obtain an accumulation of a pressure difference or a change of the pressure difference, and when the pressure data is lower than a threshold value, the controller controls the first and second electric heaters 131 and 132 to alternately heat.
Preferably, when the first electric heater performs heating and the second electric heater does not perform heating, the controller controls the first electric heater to stop heating and the second electric heater performs heating if the pressure detected by the first pressure sensing element is P1 in the previous time period and the pressure detected by the second pressure sensing element is P2 in the next time period, and if P1< P2, the numerical value of P2-P1 is lower than the threshold value; when the second electric heater heats and the first electric heater does not heat, the pressure detected by the second pressure sensing element is P1 if the pressure in the previous time period is P1 and the pressure in the adjacent subsequent time period is P2, and if P1< P2, the numerical value of P2-P1 is lower than the threshold value, the controller controls the second electric heater to stop heating and the first electric heater to heat.
Preferably, P1 and P2 are higher than the pressure of the phase-change fluid after the phase change, and preferably higher than or equal to 0.9 times the pressure at which the phase-change fluid undergoes a sufficient phase change. At this time, it is judged whether or not the phase change fluid is sufficiently heated.
Preferably, the first electric heater or the second electric heater is heated for a period of time and then detected, so as to ensure that the fluid in the electric heater fully carries out phase change.
Through the time period pressure difference detected by the pressure sensing element, the evaporation of the fluid in the first channel or the second channel is basically saturated and the volume of the internal fluid is not changed greatly under the condition of meeting a certain pressure, so that the internal fluid is relatively stable, the vibration of the tube bundle at the moment is poor, and the adjustment is needed to be carried out, the heating part is changed, and the fluid flows towards different directions. Therefore, the new electric heater is started to perform alternate heating by detecting the change of the pressure difference between the first channel and the second channel, and the heating effect and the descaling effect are increased.
The stable state of the fluid is judged according to the pressure difference or the accumulation of the pressure difference change, so that the result is more accurate, and the problem of error increase caused by aging due to the running time problem is solved.
The current first electric heater and the current second electric heater are determined to be in a heating state or a non-heating state through sequential pressure size judgment, so that the running state of the first electric heater and the second electric heater is determined according to different conditions.
Preferably, when the first electric heater performs heating and the second electric heater does not perform heating, if the pressure of the first pressure sensor in the previous period is P1 and the pressure of the adjacent subsequent period is P2, if P1 is P2, the heating is judged according to the following conditions:
if the pressure P1 is greater than the pressure of the first data, and is lower than the threshold value, the controller controls the first electric heater to stop heating, and the second electric heater to start heating. Wherein the first data is greater than the pressure of the phase change fluid after the phase change; preferably the first data is 0.9 times the pressure at which the phase change fluid substantially changes phase;
if the pressure of the second data is less than or equal to P1, when the pressure is lower than the threshold value, the controller controls the first electric heater to continue heating, and the second electric heater does not heat; wherein the second data is 1.1 times the pressure at which the phase change fluid does not undergo a phase change.
Preferably, when the first electric heater does not perform heating and the second electric heater performs heating, if the pressure of the second pressure sensor in the previous period is P1 and the pressure of the second pressure sensor in the next following period is P2, if P1 is P2, the heating is judged according to the following conditions:
if the pressure P1 is greater than the pressure of the first data, and is lower than the threshold value, the controller controls the second electric heater to stop heating, and the first electric heater starts heating. Wherein the first data is greater than the pressure of the phase change fluid after the phase change; preferably the first data is 0.9 times the pressure at which the phase change fluid substantially changes phase;
if the pressure of the second data is less than or equal to P1, when the pressure is lower than the threshold value, the controller controls the second electric heater to continue heating, and the first electric heater does not heat; wherein the second data is 1.1 times the pressure at which the phase change fluid does not undergo a phase change.
The first data is pressure data in a fully heated state, and the second data is pressure data in the absence of heating or in the beginning of heating. The judgment of the pressure is also used for determining whether the current electric heater is in a heating state or a non-heating state, so that the operation state of the electric heater is determined according to different conditions.
Preferably, n pressure sensing elements are arranged in the first pipe box 2 or the second pipe box 8, and the pressure P in the current time period is calculated sequentiallyiPressure Q of the preceding periodi-1Difference D ofi＝Pi-Qi-1And for n pressure differences DiPerforming arithmetic cumulative summation
Figure BDA0002188855730000061
When the value of Y is lower than the set threshold value, the controller controls the first electric heater and the second electric heater to heat or not heat according to the value of Y.
When the first electric heater heats and the second electric heater does not heat, the controller calculates Y according to the data measured by the first pressure sensing element, preferably, when Y is greater than 0, and is lower than a threshold value, the controller controls the first electric heater to stop heating and the second electric heater to start heating; if Y <0, when the Y is lower than the threshold value, the controller controls the first electric heater to heat, and the second electric heater does not heat.
When the second electric heater heats and the first electric heater does not heat, the controller calculates Y according to the data measured by the second pressure sensing element, preferably, when Y is greater than 0, and is lower than the threshold value, the controller controls the second electric heater to stop heating and the first electric heater to start heating. If Y <0, when the Y is lower than the threshold value, the controller controls the second electric heater to heat, and the first electric heater does not heat.
The current electric heater is determined to be in a sufficient heating state or a just heating state through sequential pressure size judgment, so that the running state of the electric heater is determined according to different conditions.
Preferably, the period of time for measuring the pressure is 1 to 10 minutes, preferably 3 to 6 minutes, and further preferably 4 minutes.
Preferably, the threshold is 100-1000 pa, preferably 500 pa.
Preferably, the pressure value may be an average pressure value over a period of the time period. The pressure at a certain moment in time may also be used. For example, preferably both are pressures at the end of the time period.
Second, independently switch over heating part and adjust vibration based on temperature difference
Preferably, the first and second temperature sensors are respectively disposed in the first and second tube boxes 2 and 8 to detect temperatures in the first and second tube boxes, the first and second temperature sensors are in data connection with the controller, the controller extracts temperature data of the first and second temperature sensors according to a time sequence, obtains an accumulation of temperature differences or changes of the temperature differences by comparing temperature data of adjacent time periods, and controls the first and second electric heaters 131 and 132 to alternately heat when the temperature difference is lower than a threshold value.
Through the temperature difference or the accumulated temperature difference of the preceding and following time periods detected by the temperature sensing element, the evaporation of the fluid inside can be judged to be basically saturated through the temperature difference, and the volume of the fluid inside is basically not changed much. So that the fluid undergoes a flow change to thereby effect vibration.
The stable state of the fluid is judged according to the temperature difference or the accumulation of the temperature difference change, so that the result is more accurate, and the problem of error increase caused by aging due to the problem of operation time is solved.
Preferably, when the first electric heater heats and the second electric heater does not heat, the temperature detected by the first temperature sensing element is lower than a threshold value if the temperature in the previous time period is T1 and the temperature in the adjacent subsequent time period is T2, and if T1< T2, the controller controls the first electric heater to stop heating and the second electric heater to heat, and at this time, preferably, T1 and T2 are greater than or equal to the temperature of the phase-change fluid after the phase change, and at this time, whether the phase-change fluid is sufficiently heated is judged. If T1> T2, the controller controls the first electric heater to heat and the second electric heater to not heat when the threshold value is lower.
Preferably, when the second electric heater heats and the first electric heater does not heat, the temperature detected by the second temperature sensing element is controlled by the controller to stop heating if the temperature in the previous time interval is T1 and the temperature in the next time interval is T2, and if T1< T2 is lower than the threshold value, the first electric heater heats, preferably, T1 and T2 are greater than or equal to the temperature of the phase-change fluid after the phase-change, and then, whether the phase-change fluid is sufficiently heated is judged. If T1> T2, the controller controls the second electric heater to heat and the first electric heater to not heat when the threshold value is lower.
Preferably, the first electric heater or the second electric heater is heated for a period of time and then detected, so as to ensure that the fluid in the electric heater fully carries out phase change.
The current electric heater is determined to be in a heating state, a full heating period or a just heating period through sequential temperature judgment, so that the running state of the electric heater is determined according to different conditions.
Preferably, when the first electric heater performs heating and the second electric heater does not perform heating, if the temperature of the first temperature sensor in the preceding period is T1 and the temperature of the adjacent following period is T2, if T1 is T2, the heating is judged according to the following conditions:
if the temperature T1 is higher than the temperature of the first data and is lower than the threshold value, the controller controls the first electric heater to stop heating and the second electric heater to heat; wherein the first data is greater than the temperature of the phase change fluid after the phase change; preferably the first data is a temperature at which the phase change fluid substantially changes phase; if T1 is less than or equal to the temperature of the second data, which is less than or equal to the temperature at which the phase change fluid does not change, and is lower than the threshold value, the controller controls the first electric heater to heat and the second electric heater to not heat.
Preferably, when the second electric heater performs heating and the first electric heater does not perform heating, if the temperature of the second temperature sensor in the preceding period is T1 and the temperature of the second temperature sensor in the adjacent following period is T2, if T1 is T2, the heating is judged according to the following conditions:
if the temperature T1 is higher than the temperature of the first data and is lower than the threshold value, the controller controls the second electric heater to stop heating, and the first electric heater carries out heating; wherein the first data is greater than the temperature of the phase change fluid after the phase change; preferably the first data is a temperature at which the phase change fluid substantially changes phase; if T1 is equal to or lower than the temperature of the second data, which is equal to or lower than the temperature at which the phase change of the phase-change fluid does not occur, and the temperature is lower than the threshold value, the controller controls the second electric heater to heat and the first electric heater not to heat.
The first data is temperature data of a sufficiently heated state, and the second data is temperature data of no heating or temperature data of the beginning of heating. The above-mentioned temperature determination also determines whether the current electric heater is in a sufficient heating state or a just-heated state, and determines the operation state of the electric heater according to different situations.
Preferably, n first temperature sensing elements or n second temperature sensing elements are arranged in the first tube box 2 or the second tube box 8, and the temperature T of the current time period is calculated sequentiallyiTemperature Q of the preceding time periodi-1Difference D ofi＝Ti-Qi-1And for n temperature differences DiPerforming arithmetic cumulative summation
Figure BDA0002188855730000081
When the value of Y is lower than the set threshold value, the controller controls the first electric heater and the second electric heater to heat or not heat according to the value of Y.
When the first electric heater heats and the second electric heater does not heat, the controller calculates Y according to the temperature data measured by the first temperature sensing element, preferably, when Y is greater than 0, and is lower than a threshold value, the controller controls the first electric heater not to heat and the second electric heater to heat; if Y <0, when the Y is lower than the threshold value, the controller controls the first electric heater to heat, and the second electric heater does not heat.
When the second electric heater heats and the first electric heater does not heat, the controller calculates Y according to the temperature data measured by the second temperature sensing element, preferably, when Y is greater than 0, and is lower than a threshold value, the controller controls the second electric heater not to heat and the first electric heater to heat; if Y <0, when the Y is lower than the threshold value, the controller controls the second electric heater to heat, and the first electric heater does not heat.
The current electric heater is determined to be in a sufficient heating state or a heating state just beginning through sequential temperature size judgment, so that the running state of the electric heater is determined according to different conditions.
Preferably, if Y is 0, heating is judged according to the following:
when the first electric heater is used for heating and the second electric heater is not used for heating, the temperature data measured by the first temperature sensing element of the controller is calculated, if T isiIf the arithmetic mean of the first data is higher than the temperature of the first data, the controller controls the first electric heater not to heat and the second electric heater to heat when the arithmetic mean of the first data is lower than the threshold; wherein the first data is greater than the temperature of the phase change fluid after the phase change; preferably the temperature at which the phase change fluid substantially changes phase;
if T isiIs less than the temperature of the second data, the controller controls the first electric heater to heat and the second electric heater to not heat when the temperature of the second data is less than the threshold value, wherein the second data is less than or equal to the temperature at which the phase change of the phase change fluid does not occur.
When the second electric heater is heating and the first electric heater is not heating, the controller calculates the temperature data measured by the second temperature sensing element, if T isiIf the arithmetic mean of the first data is higher than the temperature of the first data, the controller controls the second electric heater not to heat and the first electric heater to heat when the arithmetic mean of the first data is lower than the threshold; wherein the first data is greater than the temperature of the phase change fluid after the phase change; preferably the temperature at which the phase change fluid substantially changes phase;
if T isiIs less than the temperature of the second data, the controller controls the second electric heater to heat when the temperature is lower than the threshold value, and the first electric heater does not heat, wherein the second data is less than or equal to the temperature at which the phase change fluid does not change phase.
The first data is temperature data of a sufficiently heated state, and the second data is temperature data of no heating or temperature data of the beginning of heating. The above-mentioned temperature determination also determines whether the current electric heater is in a sufficient heating state or in a heating state just started, and determines the operation state of the electric heater according to different situations.
Preferably, the period of time for measuring the temperature is 1 to 10 minutes, preferably 3 to 6 minutes, and further preferably 4 minutes.
Preferably, the threshold is 1-10 degrees Celsius, preferably 4 degrees Celsius.
Preferably, the temperature value may be an average temperature value over a period of the time period. The temperature at a certain moment in time may also be used. For example, preferably both are temperatures at the end of the time period.
Third, adjust vibration based on liquid level difference is from autonomy switching heating element
Preferably, a first liquid level sensing element and a second liquid level sensor are respectively arranged in the first channel box and the second channel box and used for detecting liquid levels of fluids in the first channel box and the second channel box, the first liquid level sensing element and the second liquid level sensing element are in data connection with a controller, the controller extracts liquid level data of the first liquid level sensing element or the second liquid level sensor according to a time sequence, accumulation of liquid level difference or liquid level difference change is obtained through comparison of liquid level data of adjacent time periods, and when the liquid level difference is lower than a threshold value, the controller controls the first electric heater 131 and the second electric heater 132 to heat alternately.
Through the liquid level difference of the front time and the back time or the accumulated liquid level difference detected by the liquid level sensing element, the evaporation of the internal fluid can be judged to be basically saturated through the liquid level difference, and the volume of the internal fluid is basically not changed greatly. Causing the fluid to undergo a change in direction to effect vibration.
The stable state of the fluid is judged according to the liquid level difference or the accumulation of the change of the liquid level difference, so that the result is more accurate, and the problem of error increase caused by aging due to the problem of operation time is solved.
Preferably, when the first electric heater performs heating and the second electric heater does not perform heating, the liquid level detected by the first liquid level sensing element is preferably controlled by the controller not to perform heating and the second electric heater performs heating if the liquid level in the preceding time period is L1 and the liquid level in the adjacent following time period is L2 and is lower than the threshold value if L1> L2; in this case, it is preferable that L1 and L2 are not more than the liquid level of the phase-change fluid after the phase change, and it is determined whether or not the phase-change fluid is sufficiently heated. If L1< L2, then below the threshold, the controller controls the first electric heater to heat and the second electric heater to not heat.
Preferably, when the first electric heater does not perform heating and the second electric heater performs heating, the liquid level detected by the second liquid level sensing element is preferably controlled by the controller not to perform heating and the first electric heater performs heating if the liquid level in the previous time period is L1 and the liquid level in the adjacent subsequent time period is L2 and is lower than the threshold value if L1> L2; at this time, it is preferable that TL1 and L2 be equal to or less than the liquid level of the phase-change fluid after the phase change, and at this time, it is determined whether or not the phase-change fluid is sufficiently heated. If L1< L2, then below the threshold, the controller controls the second electric heater to heat and the first electric heater does not heat.
Preferably, the first electric heater or the second electric heater is heated for a period of time and then detected, so as to ensure that the fluid in the electric heater fully carries out phase change.
The current electric heater is determined to be in a sufficient heating state or a heating state just beginning through sequential liquid level judgment, so that the running state of the electric heater is determined according to different conditions.
Preferably, if the liquid level of the preceding period is L1, the liquid level of the adjacent succeeding period is L2, and if L1 is L2, heating is judged according to the following:
when the first electric heater heats and the second electric heater does not heat, the liquid level detected by the first liquid level sensing element is lower than a threshold value if L1 is smaller than the liquid level of the first data or L1 is 0, the controller controls the first electric heater not to heat and the second electric heater to heat; wherein the first data is greater than the liquid level of the phase-change fluid after the phase change; preferably the first data is a level at which the phase change fluid is substantially phase changed; if L1 is greater than or equal to the level of the second data, which is less than or equal to the level at which the phase change fluid does not undergo phase change, and is lower than the threshold value, the controller controls the first electric heater to heat and the second electric heater to not heat.
When the second electric heater heats and the first electric heater does not heat, the liquid level detected by the second liquid level sensing element is lower than the threshold value if L1 is smaller than the liquid level of the first data or L1 is 0, the controller controls the second electric heater not to heat and the first electric heater heats; wherein the first data is greater than the liquid level of the phase-change fluid after the phase change; preferably the first data is a level at which the phase change fluid is substantially phase changed; and if the L1 is greater than or equal to the liquid level of the second data, the controller controls the second electric heater to heat and the first electric heater to not heat when the L1 is lower than the threshold value, wherein the second data is less than or equal to the liquid level at which the phase-change fluid does not change phase.
The first data is liquid level data of a fully heated state, including liquid level of dry-out, and the second data is liquid level data of no heating or heating beginning. Through the judgment of the liquid level, whether the current electric heater is in a heating state or a non-heating state is also determined, so that the operation state of the electric heater is determined according to different conditions.
Preferably, n liquid level sensing elements are arranged in the first channel box 2 or the second channel box 8, and the liquid level L in the current time period is calculated in sequenceiAnd the liquid level Q of the previous time periodi-1Difference D ofi＝Li-Qi-1And for n liquid level differences DiPerforming arithmetic cumulative summation
Figure BDA0002188855730000101
When the value of Y is lower than a set threshold value, the controller controls the first electric heater and the second electric heater to heat or not heat.
When the first electric heater heats and the second electric heater does not heat, the liquid level detected by the first liquid level sensing element is preferably Y >0, and if Y is less than a threshold value, the controller controls the first electric heater not to heat and the second electric heater to heat; if Y <0, when the Y is lower than the threshold value, the controller controls the first electric heater to heat, and the second electric heater does not heat.
When the second electric heater heats and the first electric heater does not heat, the liquid level detected by the second liquid level sensing element is preferably Y >0, and if Y is less than the threshold value, the controller controls the second electric heater not to heat and the first electric heater to heat; if Y <0, when the Y is lower than the threshold value, the controller controls the second electric heater to heat, and the first electric heater does not heat.
The current electric heater is determined to be in a sufficient heating state or a just heating state through sequential liquid level judgment, so that the running state of the electric heater is determined according to different conditions.
Preferably, if Y is 0, heating is judged according to the following:
when the first electric heater is used for heating and the second electric heater is not used for heating, the liquid level detected by the first liquid level sensing element is LiIf the arithmetic mean of the first data is less than the liquid level of the first data or 0, the controller controls the first electric heater not to heat and the second electric heater to heat when the arithmetic mean of the first data and the second data is lower than the threshold value; wherein the first data is greater than the liquid level of the phase-change fluid after the phase change; preferably a level at which the phase change fluid is substantially phase-changed; if L isiIf the arithmetic mean of the first data and the second data is larger than the liquid level of the second data, the controller controls the first electric heater to heat and the second electric heater to not heat when the arithmetic mean of the first data and the second data is lower than the threshold value, wherein the second data is smaller than or equal to the liquid level at which the phase change fluid does not change phase.
When the second electric heater is used for heating and the first electric heater is not used for heating, the liquid level detected by the second liquid level sensing element is LiIf the arithmetic mean of the first data is less than the liquid level of the first data or 0, the controller controls the second electric heater not to heat and the first electric heater to heat when the arithmetic mean of the first data is less than the threshold value; wherein the first data is greater than the liquid level of the phase-change fluid after the phase change; preferably a level at which the phase change fluid is substantially phase-changed; if L isiIf the arithmetic mean of the first data and the second data is larger than the liquid level of the second data, the controller controls the second electric heater to heat when the arithmetic mean of the first data and the second data is lower than the threshold value, and the first electric heater does not heat, wherein the second data is smaller than or equal to the liquid level at which the phase change fluid does not change phase.
The first data is liquid level data of a fully heated state, including liquid level of dry-out, and the second data is liquid level data of no heating or heating beginning. The judgment of the liquid level also determines whether the current electric heater is in a sufficient heating state or a just heating state, so that the running state of the electric heater is determined according to different conditions.
Preferably, the period of time for which the measurement is also made is 1 to 10 minutes, preferably 3 to 6 minutes, and further preferably 4 minutes.
Preferably, the threshold is 1-10 mm, preferably 4 mm.
Preferably, the water level value may be an average water level value over a period of the time period. The water position at a certain moment in time may also be used. Such as preferably both water levels at the end of the time period.
Adjusting vibration based on speed automatic switching heating component
Preferably, a speed sensing element is arranged in the free end of the tube bundle and used for detecting the flow rate of the fluid in the free end of the tube bundle, the speed sensing element is in data connection with the controller, the controller extracts speed data according to a time sequence, the speed difference or the accumulation of the speed difference change is obtained through comparison of the speed data of adjacent time periods, and when the speed difference or the accumulation of the speed difference is lower than a threshold value, the controller controls the first electric heater 131 and the second electric heater 132 to heat alternately.
The difference in time velocity or the difference in cumulative velocity before and after detection by the velocity sensing element can be used to determine that the evaporation of the fluid inside has substantially reached saturation and that the volume of the fluid inside has not substantially changed, in which case the fluid inside is relatively stable and the tube bundle is less vibratile, requiring adjustment to vibrate the tube bundle and switch the heating element. So that the fluid undergoes a change in flow direction and a change in volume to effect vibration.
The stable state of the fluid is judged according to the speed difference or the accumulation of the speed difference change, so that the result is more accurate, and the problem of error increase caused by aging due to the running time problem is solved.
When the first electric heater performs heating and the second electric heater does not perform heating, preferably, if the speed of the previous time period is V1 and the speed of the adjacent subsequent time period is V2, and if V1 < V2, the speed is lower than the threshold value, the controller controls the first electric heater not to perform heating and the second electric heater to perform heating; if V1 > V2, the controller controls the first electric heater to heat and the second electric heater to not heat when the temperature is lower than the threshold value.
When the second electric heater performs heating and the first electric heater does not perform heating, preferably, if the speed of the previous time period is V1 and the speed of the adjacent subsequent time period is V2, and if V1 < V2, the speed is lower than the threshold value, the controller controls the second electric heater not to perform heating and the first electric heater performs heating; if V1 > V2, the controller controls the second electric heater to heat and the first electric heater does not heat when the temperature is lower than the threshold value.
Preferably, the first electric heater or the second electric heater is heated for a period of time and then detected, so as to ensure that the fluid in the electric heater fully carries out phase change.
The current electric heater is determined to be in a sufficient heating state or a just heating state through the sequential speed judgment, so that the running states of different electric heaters are determined according to different conditions.
Preferably, if the speed of the preceding time period is V1, the speed of the adjacent succeeding time period is V2, and if V1 is V2, heating is judged according to the following:
when the first electric heater heats and the second electric heater does not heat, if the speed of V1 is higher than the speed of the first data and is lower than the threshold value, the controller controls the first electric heater not to heat and the second electric heater to heat; wherein the first data is greater than the speed of the phase change fluid after the phase change; preferably the first data is the speed at which the phase change fluid is substantially phase changed; if V1 is less than or equal to the speed of the second data, the controller controls the first electric heater to heat and the second electric heater to not heat when the speed is lower than the threshold value, wherein the speed of the second data is less than or equal to the speed at which the phase change fluid does not change phase.
When the second electric heater heats and the first electric heater does not heat, if the speed of V1 is higher than the speed of the first data and is lower than the threshold value, the controller controls the second electric heater not to heat and the first electric heater to heat; wherein the first data is greater than the speed of the phase change fluid after the phase change; preferably the first data is the speed at which the phase change fluid is substantially phase changed; if V1 is less than or equal to the speed of the second data, the controller controls the second electric heater to heat and the first electric heater to not heat when the speed is lower than the threshold value, wherein the speed of the second data is less than or equal to the speed at which the phase change fluid does not change phase.
The first data is speed data of a sufficiently heated state, and the second data is speed data of no heating or heating just started. The above determination of the speed is also used to determine whether the current electric heater is in a fully heated state or a just heated state, so as to determine the operation state of the electric heater according to different situations.
Preferably, the number of the speed sensing elements is n, and the speed V of the current time period is calculated in sequenceiAnd the previous time speed Qi-1Difference D ofi＝Vi-Qi-1And for n speed differences DiPerforming arithmetic cumulative summation
Figure BDA0002188855730000131
When the value of Y is lower than a set threshold value, the controller controls the electric heater to stop heating or continue heating.
When the first electric heater heats and the second electric heater does not heat, preferably, when Y is greater than 0 and is lower than the threshold value, the controller controls the first electric heater not to heat and the second electric heater to heat; if Y <0, when the Y is lower than the threshold value, the controller controls the first electric heater to heat, and the second electric heater does not heat.
When the second electric heater heats and the first electric heater does not heat, preferably, when Y is greater than 0 and is lower than the threshold value, the controller controls the second electric heater not to heat and the first electric heater to heat; if Y <0, when the Y is lower than the threshold value, the controller controls the second electric heater to heat, and the first electric heater does not heat.
The current electric heater is determined to be in a sufficient heating state or a just heating state through the judgment of the speed, so that the running state of the electric heater is determined according to different conditions.
Preferably, if Y is 0, heating is judged according to the following:
when the first electric heater is heating and the second electric heater is not heating, if V isiIf the arithmetic mean of the first and second data is higher than the speed of the first data, the controller controls the first electric heater not to heat and the second electric heater to heat when the arithmetic mean of the first and second data is lower than the threshold; wherein the first data is greater than the speed of the phase change fluid after the phase change; preferably the rate at which the phase change fluid changes phase substantially; if ViIs less than the speed of the second data, the controller controls the first electric heater to heat and the second electric heater to not heat when the speed of the second data is less than the speed of the second electric heater, wherein the second data is less than or equal to the speed at which the phase change of the phase change fluid does not occur.
When the second electric heater is heating and the first electric heater is not heating, if V isiIf the arithmetic mean of the first data is higher than the speed of the first data, the controller controls the second electric heater not to heat and the first electric heater to heat when the arithmetic mean of the first data is lower than the speed of the first data; wherein the first data is greater than the speed of the phase change fluid after the phase change; preferably the rate at which the phase change fluid changes phase substantially; if ViIs less than the speed of the second data, the controller controls the second electric heater to heat when the speed is lower than the threshold value, and the first electric heater does not heat, wherein the second data is less than or equal to the speed at which the phase change fluid does not change phase.
The first data is speed data of a sufficiently heated state, and the second data is speed data of no heating or heating just started. The judgment of the speed is also used for determining whether the current electric heater is in a heating state or a non-heating state, so that the operation state of the electric heater is determined according to different conditions.
Preferably, the period of time for measuring the speed is 1 to 10 minutes, preferably 3 to 6 minutes, and further preferably 4 minutes.
Preferably, the threshold is 1-3 m/s, preferably 2 m/s.
Preferably, the speed value may be an average pressure value over a period of the time period. The speed at a certain moment in time may also be used. For example, preferably both are speeds at the end of the time period.
Preferably, the speed sensing element is disposed at the free end. Through setting up at the free end, can perceive the speed change of free end to realize better control and regulation.
Preferably, the pipe diameter of the first pipe box 2 is equal to that of the second pipe box 8. The pipe diameters of the first pipe box and the second pipe box are equal, so that the fluid can be ensured to be subjected to phase change in the first box body and keep the same transmission speed as the second pipe box.
Preferably, the connection position 9 of the coil pipe at the first header is lower than the connection position of the second header and the coil pipe. This ensures that steam can rapidly enter the second header upwards.
Preferably, the bottom parts of the first channel box and the second channel box are provided with return pipes, so that the fluid condensed in the first channel box and the second channel box can quickly flow.
Preferably, the first and second headers are arranged in a height direction, the coil pipe is provided in plural numbers in the height direction of the first header, and a pipe diameter of the coil pipe is gradually reduced from top to bottom.
Preferably, the pipe diameter of the coil pipe is gradually decreased and gradually increased along the direction from the top to the bottom of the first pipe box.
The pipe diameter range through the coil pipe increases, can guarantee that more steam passes through upper portion and gets into first, two boxes, guarantees that the distribution of steam is even in all coil pipes, further reinforces the heat transfer effect for the whole vibration effect is even, and the heat transfer effect increases, further improves heat transfer effect and scale removal effect. Experiments show that better heat exchange effect and descaling effect can be achieved by adopting the structural design.
Preferably, the plurality of coils are arranged along the height direction of the first tube box, and the distance between the adjacent coils is increased from the top to the bottom.
Preferably, the distance between the coils increases along the height direction of the first header.
The interval range through the coil pipe increases, can guarantee that more steam passes through upper portion and gets into first, two boxes, guarantees that the distribution of steam is even in all coil pipes, further strengthens heat transfer effect for the whole vibration effect is even, and the heat transfer effect increases, further improves heat transfer effect and scale removal effect. Experiments show that better heat exchange effect and descaling effect can be achieved by adopting the structural design.
Preferably, as shown in fig. 7, the steam drum is a drum with a circular cross section, and a plurality of electric heating devices are arranged in the steam drum.
Preferably, as shown in fig. 7, one of the plurality of electric heating devices disposed in the steam drum is disposed at the center of the steam drum to become a central electric heating device, and the others are distributed around the center of the steam drum to become peripheral electric heating devices. Through the structural design, the fluid in the steam pocket can fully achieve the vibration purpose, and the heat exchange effect is improved.
Preferably, the heating power of the single peripheral electric heating means is smaller than the heating power of the central electric heating means. Through the design, the center reaches higher vibration frequency to form a central vibration source, so that the periphery is influenced, and better heat transfer enhancement and descaling effects are achieved.
Preferably, on the same horizontal heat exchange section, the fluid needs to achieve uniform vibration, and uneven heat exchange distribution is avoided. It is therefore necessary to distribute the amount of heating power among the different electric heating devices reasonably. Experiments show that the heating power ratio of the central electric heating device to the peripheral tube bundle electric heating device is related to two key factors, wherein one of the two key factors is the distance between the peripheral electric heating device and the center of the steam drum (namely the distance between the circle center of the peripheral electric heating device and the circle center of the central electric heating device) and the diameter of the steam drum. Therefore, the invention optimizes the optimal proportional distribution of the pulsating flow according to a large number of numerical simulations and experiments.
Preferably, the radius of the inner wall of the steam drum is B, the center of the central electric heating device is arranged at the center of the circular section of the steam drum, the distance from the center of the peripheral electric heating device to the center of the circular section of the steam drum is S, the centers of adjacent peripheral electric heating devices are respectively connected with the center of the circular section, the included angle formed by the two connecting lines is a, the heating power of the peripheral electric heating device is W2, and the heating power of a single central electric heating device is W1, so that the following requirements are met:
W1/W2 ═ a-B ═ Ln (B/S); ln is a logarithmic function;
a, b are coefficients, wherein 1.9819< a <1.9823,0.5258< b < 0.5264;
1.25<B/S<2.1；
1.6<W1/W2<1.9。
wherein 35 ° < a <80 °.
Preferably, the number of the four-side distribution is 4-5.
Preferably, B is 1600-2400 mm, preferably 2000 mm; s is 1200-2000 mm, preferably 1700 mm; the diameter of the heat exchange tube is 12-20 mm, preferably 16 mm; the outermost diameter of the pulsating coil is 300-. The diameter of the riser is 100-116 mm, preferably 108 mm, the height of the riser is 1.8-2.2 m, preferably 2m, and the spacing between adjacent pulse tubes is 65-100 mm. Preferably around 80 mm.
The total heating power is preferably 6000-14000W, and more preferably 7500W.
More preferably, a is 1.9821 and b is 0.5261.
The steam outlet is arranged in the middle of the upper wall of the steam drum.
Preferably, the box body has a circular cross section, and is provided with a plurality of electric heating devices, wherein one electric heating device is arranged at the center of the circular cross section and the other electric heating devices are distributed around the center of the circular cross section.
The coils 1 are in one or more groups, each group of coils 1 comprises a plurality of circular arc-shaped tube bundles 12, the central lines of the circular arc-shaped tube bundles 12 are circular arcs of concentric circles, and the ends of the adjacent tube bundles 12 are communicated, so that the ends of the coils 1 form tube bundle free ends 3, 4, such as the free ends 3, 4 in fig. 2.
Preferably, the heating fluid is a vapor-liquid phase-change fluid.
Preferably, the first header 2, the second header 8, and the coil 1 are all of a circular tube structure.
Preferably, the tube bundle of the coil 1 is an elastic tube bundle.
The heat exchange coefficient can be further improved by arranging the tube bundle of the coil 1 with an elastic tube bundle.
Preferably, the concentric circles are circles centered on the center of the first header 2. I.e. the tube bundle 12 of the coil 1 is arranged around the centre line of the first tube box 2.
As shown in fig. 4, the tube bundle 12 is not a complete circle, but rather leaves a mouth, thereby forming the free end of the tube bundle. The angle of the arc of the mouth part is 65-85 degrees, namely the sum of included angles b and c in figure 5 is 65-85 degrees.
Preferably, the ends of the tube bundle on the same side are aligned in the same plane, with the extension of the ends (or the plane in which the ends lie) passing through the median line of the first tube box 2.
Further preferably, the electric heater 13 is an electric heating rod.
Preferably, the first end of the inner tube bundle of the coil 1 is connected to the first tube box 2, the second end is connected to one end of the adjacent outer tube bundle, one end of the outermost tube bundle of the coil 1 is connected to the second tube box 8, and the ends of the adjacent tube bundles are connected to form a serial structure.
The plane in which the first end is located forms an angle c of 40-50 degrees with the plane in which the centre lines of the first and second headers 2, 8 are located.
The plane of the second end forms an angle b of 25-35 degrees with the plane of the centre lines of the first and second headers 2, 8.
Through the design of the preferable included angle, the vibration of the free end is optimal, and therefore the heating efficiency is optimal.
As shown in fig. 5, there are 4 tube bundles of coil 1, with tube bundles A, B, C, D in communication. Of course, the number is not limited to four, and a plurality of the connecting structures are provided as required, and the specific connecting structure is the same as that in fig. 5.
The number of the coil pipes 1 is multiple, and the plurality of coil pipes 1 are respectively and independently connected with the first pipe box 2 and the second pipe box 8, that is, the plurality of coil pipes 1 are in a parallel structure.
Although the present invention has been described with reference to the preferred embodiments, it is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (3)

1. A steam boiler based on time-temperature difference switching heating components comprises an electric heating device and a steam drum, wherein the electric heating device is arranged in the steam drum, the steam drum comprises a water inlet pipe and a steam outlet, the electric heating device comprises a first pipe box, a second pipe box and a coil pipe, the coil pipe is communicated with the first pipe box and the second pipe box to form closed circulation of heating fluid, and an electric heater is arranged in the first pipe box; the number of the coil pipes is one or more, each coil pipe comprises a plurality of arc-shaped pipe bundles, the central lines of the arc-shaped pipe bundles are arcs taking the first pipe box as a concentric circle, and the end parts of the adjacent pipe bundles are communicated, so that the end parts of the pipe bundles form free ends of the pipe bundles; a first electric heater and a second electric heater are respectively arranged in the first channel box and the second channel box; filling phase-change fluid in the first channel and/or the second channel; the temperature control system is characterized in that a first temperature sensor and a second temperature sensor are respectively arranged in the first channel box and the second channel box and used for detecting the temperature in the first channel box and the second channel box, the first temperature sensor and the second temperature sensor are in data connection with a controller, the controller extracts the temperature data of the first temperature sensor or the second temperature sensor according to a time sequence, the temperature difference or the accumulation of the temperature difference change is obtained through the comparison of the temperature data of adjacent time periods, and when the temperature difference or the temperature difference change is lower than a threshold value, the controller controls the first electric heater and the second electric heater to heat alternately.
2. The boiler as claimed in claim 1, wherein when the first electric heater performs heating and the second electric heater does not perform heating, the first temperature sensing element senses a temperature if a temperature of a previous period is T1 and a temperature of an adjacent following period is T2, and if T1< T2, which is lower than a threshold value, the controller controls the first electric heater to stop heating and the second electric heater to perform heating; if T1> T2, the controller controls the first electric heater to heat and the second electric heater not to heat when the temperature is lower than the threshold value;
when the second electric heater heats and the first electric heater does not heat, the temperature detected by the second temperature sensing element is T1 if the temperature of the previous time period is T2 and the temperature of the adjacent subsequent time period is T2, and if T1 is less than T2 and is lower than the threshold value, the controller controls the second electric heater to stop heating and the first electric heater to heat; if T1> T2, the controller controls the second electric heater to heat and the first electric heater to not heat when the threshold value is lower.
3. The boiler as claimed in claim 1, wherein when the first electric heater performs heating and the second electric heater does not perform heating, if the temperature of the first temperature sensor in the previous period is T1 and the temperature of the adjacent subsequent period is T2, if T1= T2, heating is judged according to the following case:
if the temperature T1 is higher than the temperature of the first data and is lower than the threshold value, the controller controls the first electric heater to stop heating and the second electric heater to heat; wherein the first data is greater than the temperature of the phase change fluid after the phase change; if the temperature of the T1 is less than or equal to the temperature of the second data, the temperature is lower than a threshold value, the controller controls the first electric heater to heat, and the second electric heater does not heat;
when the second electric heater is heating and the first electric heater is not heating, if the temperature of the second temperature sensor in the previous time period is T1 and the temperature of the second temperature sensor in the next following time period is T2, if T1= T2, the heating is judged according to the following conditions:
if the temperature T1 is higher than the temperature of the first data and is lower than the threshold value, the controller controls the second electric heater to stop heating, and the first electric heater carries out heating; if the temperature of the T1 is less than or equal to the temperature of the second data, the temperature is lower than the threshold value, the controller controls the second electric heater to heat, and the first electric heater does not heat;
the first data is temperature data of a sufficiently heated state, and the second data is temperature data of no heating or temperature data of the beginning of heating.
CN201910825366.5A 2019-09-03 2019-09-03 Steam boiler capable of switching heating components based on time and temperature difference Active CN112344309B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910825366.5A CN112344309B (en) 2019-09-03 2019-09-03 Steam boiler capable of switching heating components based on time and temperature difference

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910825366.5A CN112344309B (en) 2019-09-03 2019-09-03 Steam boiler capable of switching heating components based on time and temperature difference

Publications (2)

Publication Number Publication Date
CN112344309A CN112344309A (en) 2021-02-09
CN112344309B true CN112344309B (en) 2022-01-28

Family

ID=74367871

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910825366.5A Active CN112344309B (en) 2019-09-03 2019-09-03 Steam boiler capable of switching heating components based on time and temperature difference

Country Status (1)

Country Link
CN (1) CN112344309B (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10330308B2 (en) * 2015-12-30 2019-06-25 Koninklijke Philips N.V. Apparatus for generating steam
KR101900685B1 (en) * 2016-08-01 2018-09-20 이스타 주식회사 Large scale electric water heater
CN107367058B (en) * 2016-08-06 2018-09-21 青岛科技大学 A kind of electric heater of temperature control hot water temperature
CN107356094B (en) * 2016-08-31 2019-02-22 青岛科技大学 A kind of steam dryer of steam flow intelligent control
CN106402824B (en) * 2016-09-19 2017-10-13 青岛科技大学 A kind of steam generator of mobile phone A PP smart allocation heating powers
CN108204673A (en) * 2016-12-17 2018-06-26 广东美控电子科技有限公司 Automatic desludging electric water-boiling device
KR102032174B1 (en) * 2017-01-26 2019-10-15 엘지전자 주식회사 Steam generator and cooker comprising the same
CN207113207U (en) * 2017-08-28 2018-03-16 国网山东省电力公司威海市文登区供电公司 A kind of electric heater of scale removal heat exchange
CN107620950B (en) * 2017-09-19 2019-09-17 深圳汉明威智能设备有限公司 A kind of method, apparatus and system of automatic desludging
CN109539219A (en) * 2018-12-06 2019-03-29 青岛理工大学 A kind of flash steam generator based on induction heating

Also Published As

Publication number Publication date
CN112344309A (en) 2021-02-09

Similar Documents

Publication Publication Date Title
CN112344551B (en) Water heater capable of alternately heating according to pressure difference
CN112344309B (en) Steam boiler capable of switching heating components based on time and temperature difference
CN114001340A (en) Steam boiler with steam flow intelligent communication control function
CN112443825B (en) Steam boiler based on time liquid level difference switching heating component
CN111911895B (en) Steam boiler controlled according to flow velocity difference
CN112781024B (en) Steam boiler capable of remotely controlling temperature difference to switch heating
CN112781023B (en) Steam boiler capable of remotely controlling liquid level difference to switch heating
CN112443965B (en) Water heater capable of alternately heating according to speed difference
CN113446585A (en) Water level intelligent communication control heating power&#39;s steam boiler
CN114001341A (en) Steam boiler of intelligent communication temperature control
CN111911894B (en) Steam boiler controlled according to pressure difference
CN113757995A (en) Water heater according to speed difference cloud processing
CN113669901A (en) Water heater according to pressure difference cloud processing
CN112303606B (en) Boiler capable of switching heating components according to flow velocity
CN112303607B (en) Boiler with pressure change switching heating component
CN111912100B (en) Electric water heater based on temperature difference automatic control
CN113757992A (en) Water heater with water outlet flow control function
CN111912101B (en) Electric water heater based on liquid level difference accumulation automatic control
CN113757993A (en) Water heater with water level control function
CN112303897B (en) Water heater capable of changing heating component according to temperature
CN112303898B (en) Water heater capable of changing heating component according to water level
CN112304134B (en) Rotational symmetry accumulated temperature difference vibration loop heat pipe
CN113340133B (en) Remote pressure difference heat pipe exchanger
CN112880438B (en) Heat exchanger that pressure differential was adjusted is handled to communication cloud
CN112665426B (en) Shell-and-tube heat exchanger of many casees pressure difference control

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
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20210303

Address after: 276002 west side of north section of Industrial Avenue, Lanshan District, Linyi City, Shandong Province

Applicant after: LINYI University

Applicant after: Shandong Jiaotong University

Address before: 276002 west side of north section of Industrial Avenue, Lanshan District, Linyi City, Shandong Province

Applicant before: LINYI University

GR01 Patent grant
GR01 Patent grant