CN114001340A

CN114001340A - Steam boiler with steam flow intelligent communication control function

Info

Publication number: CN114001340A
Application number: CN202010728109.2A
Authority: CN
Inventors: 崔宏飞; 张国芬; 沈保山; 其他发明人请求不公开姓名
Original assignee: Wuxi Institute of Technology
Current assignee: Wuxi Institute of Technology
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2022-02-01

Abstract

The invention provides a steam boiler with steam flow intelligent communication control, which 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, a flow sensor is arranged on the steam outlet pipeline and used for measuring the steam flow output in unit time, and the flow sensor and the electric heating device are in data connection with a controller; the controller automatically controls the power of the electric heating device according to the measured steam flow. The invention can adjust the heating power according to the quantity of the steam generated by the steam boiler, ensure the constant quantity of the steam output, and avoid the insufficient quantity or waste of the steam caused by the overlarge or undersize quantity.

Description

Steam boiler with steam flow intelligent communication control function

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.

The current steam boiler has low intelligent degree, influences the heating efficiency and also has danger.

Disclosure of Invention

The invention provides the intelligently controlled steam boiler aiming at the defects in the prior art, and the steam boiler has the functions of rapid heating, uniform temperature distribution, automatic power control, safety and reliability, improves the heating efficiency, and realizes good descaling and heating effects.

In order to achieve the purpose, the invention adopts the following technical scheme:

a steam boiler with intelligent communication control of steam flow 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, a flow sensor is arranged on the steam outlet pipe and used for measuring the steam flow output in unit time, and the flow sensor and the electric heating device are in data connection with a controller; the controller automatically controls the power of the electric heating device according to the measured steam flow;

if the measured steam flow is below a certain value, the controller controls the electric heating device to increase the heating power. If the temperature measured by the pressure sensor is higher than a certain value, the controller controls the electric heating device to reduce the heating power.

Preferably, when the measured flow rate is higher than the first flow rate, the controller controls the heating power of the electric heating device to be reduced to the first power for heating; when the measured flow is higher than a second flow higher than the first flow, the controller controls the heating power of the electric heating device to be reduced to a second power lower than the first power for heating; when the measured flow is higher than a third flow higher than the second flow, the controller controls the heating power of the electric heating device to be reduced to a third power lower than the second power for heating; when the measured flow is higher than a fourth flow higher than the third flow, the controller controls the heating power of the electric heating device to be reduced to a fourth power higher than the third power for heating; the controller stops the heating of the electric heating device when the measured flow rate is higher than a fifth flow rate that is higher than the fourth flow rate.

Preferably, the electric heating device comprises a first channel box, a second channel box and a coil pipe, the coil pipe is communicated with the first channel box and the second channel box to form closed circulation of heating fluid, and the electric heater is arranged in the first channel 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 liquid level detection device is characterized in that 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 the 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, the liquid level difference or the accumulation of the change of the liquid level difference is obtained through comparison of the 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 and the second electric heater to alternately heat.

Preferably, 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 L1 if the liquid level in the previous time period is L2 and the liquid level in the next time period is L2, and if L1> L2, the liquid level is lower than the threshold value, the controller controls the first electric heater not to heat and the second electric heater to heat; if L1< L2, when the L1< L2 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 first electric heater does not heat and the second electric heater heats, the liquid level detected by the second liquid level sensing element is preferably controlled by the controller not to heat and the first electric heater heats if the liquid level in the previous time period is L1 and the liquid level in the adjacent subsequent time period is L2 and if L1> L2, the liquid level is lower than the threshold value; if L1< L2, then below the threshold, the controller controls the second electric heater to heat and the first electric heater does not heat. The invention has the following advantages:

1. the invention can adjust the heating power according to the quantity of the steam generated by the steam boiler, ensure the constant quantity of the steam output, and avoid the insufficient quantity or waste of the steam caused by the overlarge or undersize quantity.

2. 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 liquid level difference or the accumulated liquid level difference of the previous time period and the next time period detected by the temperature sensing element through the 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, the heating part is vibrated, and the flowing direction of the fluid is opposite. So that the fluid undergoes a flow change to thereby effect vibration. The stable state of the fluid is judged according to the liquid level difference or the accumulated liquid level difference, so that the result is more accurate, and the problem of error increase caused by aging due to the running time problem is solved.

3. 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.

4. 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.

5. 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.

Said water is fed into the steam drum 11 by means of a power unit, preferably a water pump, heated in the steam drum 11 by means of the electric heating device 10, and the steam produced is discharged through the steam outlet 6.

Preferably, the discharged steam enters, for example, a steam pipe on which objects to be dried, such as clothes, etc., are disposed. Of course, the steam may also enter a drying kiln, such as a steam pipe in a rotary kiln.

Preferably, the water inlet pipe 5 is connected to a tap water pipe, and water is replenished through the tap water pipe. Preferably, a purifying device is arranged between the tap water pipe and the steam drum 11 to purify tap water, so that the heating effect is prevented from being influenced by scaling of an electric heating device in the water tank.

Preferably, the present invention can realize the following communication control:

intelligent control of temperature communication

Preferably, a temperature sensor is arranged at the bottom of the steam drum 11 and used for measuring the temperature of water in the steam drum 11. The temperature sensor and the electric heating device 10 are in data connection with a controller, and the controller automatically controls the heating power of the electric heating device 10 according to the temperature measured by the temperature sensor.

Preferably, the controller controls the electric heating apparatus 10 to start heating if the temperature measured by the temperature sensor is lower than a certain temperature. If the temperature measured by the temperature sensor is higher than a certain temperature, for example, higher than a dangerous critical temperature, the controller controls the electric heating apparatus 10 to stop heating in order to avoid overheating.

Preferably, the controller automatically increases the heating power of the electric heating apparatus 10 if the detected temperature data is lower than a first value, and automatically decreases the heating power of the electric heating apparatus 10 if the measured temperature data is higher than a second value, which is greater than the first value.

Preferably, when the measured temperature is lower than the first temperature, the electric heating device 10 starts heating and performs heating at a first power; when the measured temperature is lower than a second temperature lower than the first temperature, the electric heating device 10 heats at a second power higher than the first power; when the measured temperature is lower than a third temperature lower than the second temperature, the electric heating device 10 heats at a third power higher than the second power; when the measured temperature is lower than a fourth temperature lower than the third temperature, the electric heating device 10 heats at a fourth power higher than the third power; when the measured temperature is lower than a fifth temperature lower than the fourth temperature, the electric heating apparatus 10 is heated at a fifth power higher than the fourth power.

Preferably, the temperature sensor is arranged on the bottom wall of the furnace body.

Preferably, the temperature sensor is a plurality of temperature sensors, and the controller controls the operation of the steam boiler according to the temperature data measured by the plurality of temperature sensors.

Intelligent control of water level communication

Preferably, a water level sensor is arranged in the steam drum 11, the water level sensor, the electric heating device 10 and the water pump are in data connection with a controller, and the controller automatically controls the power of the water pump according to the measured water level in the steam drum 11.

Preferably, the controller increases the flow of water into the drum 11 by controlling the power of the water pump to be increased if the water level drops, and decreases the flow of water into the drum 11 or stops the supply of water into the drum 11 by reducing the power of the water pump or turning off the water pump if the water level is too high.

Through foretell setting, avoided on the one hand that the water level crosses the steam output rate that leads to the fact low and electric heater unit's dry combustion method, cause electric heater unit's damage and produce the incident, on the other hand, avoided because the water level is too high and the water yield that leads to the fact is too big to it is low excessively to cause the steam output rate.

Preferably, the controller controls the water pump to supply water at a first power when the measured water level is lower than a first water level; when the measured water level is lower than a second water level lower than the first water level, the controller controls the water pump to supply water at a second power higher than the first power; when the measured water level is lower than a third water level lower than the second water level, the controller controls the water pump to supply water at a third power higher than the second power; when the measured water level is lower than a fourth water level lower than the third water level, the controller controls the water pump to supply water at a fourth power higher than the third power; when the measured water level is lower than a fifth water level lower than the fourth water level, the controller controls the water pump to supply water at a fifth power higher than the fourth power.

Through the preferred of above-mentioned water level and water pump power, especially through the settlement of the water level of differentiation and water pump power, can be quick realize the invariant of water level, improve steam output rate, save time. Experiments show that the steam yield can be improved by about 12-16%.

(III) control of heating power according to water level

Preferably, a water level sensor is arranged in the steam drum 11, the water level sensor and the electric heating device 10 are in data connection with a controller, and the controller automatically controls the heating power of the electric heater according to the measured water level in the steam drum 11.

Preferably, if the water level is too low, the controller controls to reduce the power of the electric heating device 10 or directly turn off the heating of the electric heating device 10, so as to avoid the water level from being further reduced due to too high steam output caused by too high heating power, and if the water level is too high, the controller increases the steam output by increasing the heating power of the electric heating device 10, so as to reduce the water level.

Through foretell setting, avoided the water level to hang down the dry combustion method who causes electric heater unit excessively on the one hand, caused electric heater unit's damage and produced the incident, on the other hand, avoided because the water level is too high and the water yield in the furnace body that causes is too big to it is low excessively to cause steam output rate.

Preferably, when the measured water level is lower than the first water level, the controller controls the electric heating device 10 to heat at a first power; when the measured water level is lower than a second water level lower than the first water level, the controller controls the electric heating device 10 to heat at a second power lower than the first power; when the measured water level is lower than a third water level lower than the second water level, the controller controls the electric heating device 10 to heat at a third power lower than the second power; when the measured water level is lower than a fourth water level lower than the third water level, the controller controls the electric heating device 10 to heat at a fourth power lower than the third power; when the measured water level is lower than a fifth water level lower than the fourth water level, the controller controls the electric heating device to heat at a fifth power lower than the fourth power; when the measured water level is lower than a sixth water level lower than the fifth water level, the controller controls the electric heating device to stop heating.

Through the optimization of the water level and the power of the electric heating device, especially through the setting of the differentiated water level and the power of the electric heating device, the water level can be quickly positioned at a preset safety position, the steam output rate can be ensured when the water level is too high, and the time is saved.

(IV) pressure communication control

Preferably, a pressure sensor is arranged in the steam drum 11 for measuring the pressure in the steam drum 11. The pressure sensor and the electric heating device 10 are in data connection with a controller, and the controller automatically controls the heating power of the electric heating device 10 according to the pressure measured by the pressure sensor.

Preferably, the controller controls the electric heating apparatus 10 to start heating if the pressure measured by the pressure sensor is lower than a certain pressure. If the temperature measured by the pressure sensor is higher than the upper limit pressure, the controller controls the electric heating device 10 to stop heating in order to avoid danger caused by excessive pressure.

Through so setting up, can adjust heating power according to the pressure in the steam pocket 11 to guarantee under the condition of maximize steam output, guarantee steam boiler's safety.

Preferably, the controller controls the electric heating device 10 to increase the heating power if the pressure measured by the pressure sensor is lower than a certain value. If the temperature measured by the pressure sensor is higher than a certain value, the controller controls the electric heating device 10 to reduce the heating power in order to avoid the danger caused by the excessive pressure.

Preferably, when the measured pressure is higher than the first pressure, the controller controls the heating power of the electric heating device 10 to be reduced to the first power for heating; when the measured pressure is higher than a second pressure higher than the first pressure, the controller controls the heating power of the electric heating device 10 to be reduced to a second power lower than the first power for heating; when the measured pressure is higher than a third pressure higher than the second pressure, the controller controls the heating power of the electric heating device 10 to be reduced to a third power lower than the second power for heating; when the measured pressure is higher than a fourth pressure higher than the third pressure, the controller controls the heating power of the electric heating device 10 to be reduced to a fourth power higher than the third power for heating; when the measured pressure is higher than a fifth pressure higher than the fourth pressure, the controller stops the heating of the electric heating device 10.

The pressure sensor is arranged at the upper part of the furnace body.

Preferably, the pressure sensor is a plurality of pressure sensors, and the controller controls the operation of the steam boiler according to the pressure data which is the temperature measured by the plurality of pressure sensors.

(V) steam flow control

Preferably, a flow sensor is arranged on the steam outlet pipeline and used for measuring the steam flow output in unit time, and the flow sensor and the electric heating device 10 are in data connection with the controller. The controller automatically controls the power of the electric heating device according to the measured steam flow.

Preferably, the controller controls the electric heating device 10 to increase the heating power if the measured steam flow is below a certain value. If the temperature measured by the pressure sensor is higher than a certain value, the controller controls the electric heating apparatus 10 to decrease the heating power.

Through so setting up, can adjust heating power according to the steam quantity that steam boiler produced, guarantee the invariant of steam output quantity, avoid the quantity too big or undersize, cause steam quantity not enough or extravagant.

Preferably, when the measured flow rate is higher than the first flow rate, the controller controls the heating power of the electric heating device 10 to be reduced to the first power for heating; when the measured flow rate is higher than a second flow rate higher than the first flow rate, the controller controls the heating power of the electric heating device 10 to be reduced to a second power lower than the first power for heating; when the measured flow rate is higher than a third flow rate higher than the second flow rate, the controller controls the heating power of the electric heating device 10 to be reduced to a third power lower than the second power for heating; when the measured flow rate is higher than a fourth flow rate higher than the third flow rate, the controller controls the heating power of the electric heating device 10 to be reduced to a fourth power higher than the third power for heating; when the measured flow rate is higher than the fifth flow rate, which is higher than the fourth flow rate, the controller stops the heating of the electric heating apparatus 10.

By optimizing the flow rate and the power of the electric heating device, especially by setting the flow rate and the power of the electric heating device in a differentiated manner, the flow rate can be quickly kept constant, and time can be saved.

Another object of the present invention is to provide a new type of electric heating device, particularly suitable for steam boilers.

Preferably, 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 is circulated in the first pipe box 2, the second pipe box 8 and the coil 1 in a closed manner,

electric heating apparatuses

131, 132 are disposed in the electric heating apparatus 10, and the electric heating apparatus 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 heating device 131 and a second electric heating device 132 are respectively provided in the first and

second header tanks

2 and 8; 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 heating device 131 and the second electric heating device 132 are in data connection with a controller, and the controller controls the first electric heating device 131 and the second electric heating device 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 the continuous power-stable heating of the electric heating device results in a stable fluid formation of the internal electric heating device, i.e. the fluid is not flowing or has little fluidity, or the flow is stable, resulting in a greatly reduced vibration performance of the coil 1, thereby affecting the descaling of the coil 1 and the efficiency of heating. 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 heating devices

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 in the pressure difference, and when the pressure data is lower than a threshold value, the controller controls the first and second

electric heating devices

131 and 132 to alternately heat.

Preferably, when the first electric heating device heats and the second electric heating device does not heat, the pressure detected by the first pressure sensing element is P1 if the pressure in the previous time period is P1 and the pressure in the next subsequent time period is P2, and if P1< P2, the value of P2-P1 is lower than the threshold value, the controller controls the first electric heating device to stop heating and the second electric heating device to heat; when the second electric heating device heats and the first electric heating device 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 heating device to stop heating and the first electric heating device 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 heating device or the second electric heating device is heated for a period of time and then detected, so as to ensure that the fluid in the electric heating device is fully subjected to 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 heating device is started to alternately heat 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 and second electric heating devices are determined to be in a heating state or a non-heating state through sequential pressure size judgment, so that the running states of the first and second electric heating devices are determined according to different conditions.

Preferably, when the first electric heating device heats and the second electric heating device does not heat, if the pressure of the first pressure sensor in the previous time period is P1 and the pressure of the adjacent subsequent time period is P2, if P1= 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 heating device to stop heating, and the second electric heating device 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 P1 is less than or equal to the pressure of the second data, when the pressure P1 is less than the threshold value, the controller controls the first electric heating device to continue heating, and the second electric heating device 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 heating device does not perform heating and the second electric heating device performs heating, if the pressure of the second pressure sensor in the previous time period is P1 and the pressure of the second pressure sensor in the next following time period is P2, if P1= 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 heating device to stop heating, and the first electric heating device 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 P1 is less than or equal to the pressure of the second data, when the pressure P1 is less than the threshold value, the controller controls the second electric heating device to continue heating, and the first electric heating device 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 heating device is in a heating state or a non-heating state, so that the operation state of the electric heating device is determined according to different conditions.

Preferably, n pressure sensing elements are arranged in the first tube box 2 or the second tube box 8, and the pressure in the current time period is calculated sequentially

Pressure of the previous time period

Difference of (2)

And for n pressure differences

Performing arithmetic cumulative summation

When is coming into contact withYWhen the value of (b) is lower than a set threshold value, the controller is based onYThe values control the first and second electric heating devices to heat or not to heat.

When the first electric heating device heats and the second electric heating device does not heat, the controller calculates Y according to the data measured by the first pressure sensing element, preferably, Y is greater than 0, and when the value is lower than a threshold value, the controller controls the first electric heating device to stop heating and the second electric heating device to start heating; if Y <0, the controller controls the first electric heating device to heat and the second electric heating device not to heat when Y is lower than the threshold value.

When the second electric heating device heats and the first electric heating device does not heat, the controller calculates Y according to the data measured by the second pressure sensing element, preferably, Y is greater than 0, and when the value is lower than the threshold value, the controller controls the second electric heating device to stop heating and the first electric heating device to start heating. If Y <0, the controller controls the second electric heating device to heat and the first electric heating device does not heat when Y is lower than the threshold value.

The current electric heating device 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 heating device 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 the temperatures in the first and second tube boxes, the first and second temperature sensors are in data connection with the controller, the controller extracts the temperature data of the first or second temperature sensors according to a time sequence, obtains the temperature difference or the accumulation of the temperature difference changes by comparing the temperature data of adjacent time periods, and controls the first and second

electric heaters

131 and 132 to alternately heat when the temperature difference or the accumulation of the temperature difference changes is less 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 heating device heats and the second electric heating device 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 next time period is T2, and if T1< T2, the controller controls the first electric heating device to stop heating and the second electric heating device to heat, and at this time, T1 and T2 are preferably 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 determined. If T1> T2, the controller controls the first electric heating device to heat and the second electric heating device not to heat when the threshold value is lower.

Preferably, when the second electric heating device heats and the first electric heating device 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< T2 is lower than the threshold value, the controller controls the second electric heating device to stop heating, and when the first electric heating device heats, T1 and T2 are preferably equal to or higher than 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 second electric heating device to heat and the first electric heating device not to heat when the threshold value is lower.

The current electric heating device 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 heating device is determined according to different conditions.

Preferably, when the first electric heating device performs heating and the second electric heating device does not perform heating, if the temperature of the first temperature sensor in the preceding time period is T1 and the temperature of the adjacent 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 lower than the threshold value, the controller controls the first electric heating device to stop heating and the second electric heating device 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 the temperature of the second data is less than or equal to the temperature of the second data, the temperature is lower than the threshold value, the controller controls the first electric heating device to heat, and the second electric heating device does not heat, wherein the temperature of the second data is less than or equal to the temperature at which the phase change fluid does not change phase.

Preferably, when the second electric heating device heats and the first electric heating device does not heat, 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 lower than the threshold value, the controller controls the second electric heating device to stop heating, and the first electric heating device heats; 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, the controller controls the second electric heating device to heat and the first electric heating device to not heat when the temperature is lower than the threshold value, 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 heating device is in a fully-heated state or a just-heated state, and determines the operation state of the electric heating device 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 in the current time period is sequentially calculated

Temperature of the previous time period

Difference of (2)

And for n temperature differences

Performing arithmetic cumulative summation

When the first electric heating device heats and the second electric heating device does not heat, the temperature data measured by the first temperature sensing element of the controller calculates Y, preferably, Y is greater than 0, and if the temperature data is lower than a threshold value, the controller controls the first electric heating device not to heat and the second electric heating device to heat; if Y <0, the controller controls the first electric heating device to heat and the second electric heating device not to heat when Y is lower than the threshold value.

When the second electric heating device heats and the first electric heating device 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 heating device not to heat and the first electric heating device to heat; if Y <0, the controller controls the second electric heating device to heat and the first electric heating device does not heat when Y is lower than the threshold value.

The current electric heating device 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 heating device is determined according to different conditions.

Preferably, if Y =0, the heating is judged according to the following:

when the first electric heating device heats and the second electric heating device does not heat, the temperature data measured by the first temperature sensing element of the controller is calculated, if the temperature data measured by the first temperature sensing element of the controller is not calculated

If the arithmetic mean of the first data is higher than the temperature of the first data, the controller controls the first electric heating device not to heat and the second electric heating device 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 it is not

Is less than the temperature of the second data, the controller controls the first electric heating device to heat and the second electric heating device 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 fluid does not change.

When the second electric heating device is used for heating and the first electric heating device is not used for heating, the temperature data measured by the second temperature sensing element of the controller is calculated, if the temperature data measured by the second temperature sensing element of the controller is not used for heating

If the arithmetic mean of the first data is higher than the temperature of the first data, the controller controls the second electric heating device not to heat and the first electric heating device to heat when the arithmetic mean of the first data is lower than the temperature of the first data; 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 it is not

Is less than the temperature of the second data, the controller controls the second electric heating device to heat when the temperature is lower than the threshold value, and the first electric heating device 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 heating device is in a sufficient heating state or in a heating state just started, and determines the operation state of the electric heating device 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 heating device 131 and the second electric heating device 132 to alternately heat.

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 heating device heats and the second electric heating device does not heat, the liquid level detected by the first liquid level sensing element is preferably controlled by the controller not to heat and the second electric heating device heats if the liquid level in the previous time period is L1 and the liquid level in the next time period is L2, and if L1> L2, the liquid level is lower than the threshold value; 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 heating device to heat and the second electric heating device not to heat.

Preferably, when the first electric heating device does not heat and the second electric heating device heats, the liquid level detected by the second liquid level sensing element is preferably controlled by the controller not to heat and the first electric heating device heats if the liquid level in the previous time period is L1 and the liquid level in the next time period is L2, and if L1> L2 is lower than the threshold value; 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 heating device to heat and the first electric heating device not to heat.

The current electric heating device is determined to be in a sufficient heating state or a heating state just beginning through the sequential liquid level judgment, so that the running state of the electric heating device 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= L2, heating is judged according to the following cases:

when the first electric heating device heats and the second electric heating device does not heat, the liquid level detected by the first 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 first electric heating device not to heat and the second electric heating device 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 the L1 is greater than or equal to the level of the second data, and is lower than the threshold value, the controller controls the first electric heating device to heat, and the second electric heating device does not heat, wherein the second data is less than or equal to the level at which the phase-change fluid does not change phase.

When the second electric heating device heats and the first electric heating device does not heat, the liquid level detected by the second liquid level sensing element, if the L1 is smaller than the liquid level of the first data or the L1 is 0, the liquid level is lower than the threshold value, the controller controls the second electric heating device not to heat and the first electric heating device 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 heating device to heat and does 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 the 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 heating device is in a heating state or a non-heating state is also determined, so that the operation state of the electric heating device is determined according to different conditions.

Preferably, the first header 2 or the second header 8 is provided thereinN liquid level sensing elements are used for sequentially calculating the liquid level in the current time period

Liquid level of the previous time period

Difference of (2)

And for n liquid level differences

Performing arithmetic cumulative summation

When is coming into contact withYWhen the value of (b) is lower than the set threshold value, the controller controls the first and second electric heaters to heat or not to heat.

When the first electric heating device heats and the second electric heating device 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 heating device not to heat and the second electric heating device to heat; if Y <0, the controller controls the first electric heating device to heat and the second electric heating device not to heat when Y is lower than the threshold value.

When the second electric heating device heats and the first electric heating device 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 heating device not to heat and the first electric heating device to heat; if Y <0, the controller controls the second electric heating device to heat and the first electric heating device does not heat when Y is lower than the threshold value.

The current electric heating device is determined to be in a sufficient heating state or a just heating state through the sequential liquid level judgment, so that the running state of the electric heating device is determined according to different conditions.

Preferably, if Y =0, the heating is judged according to the following:

when the first electric heating device is used for heating and the second electric heating device is not used for heating, the liquid level detected by the first liquid level sensing element is detected, if the first electric heating device is used for heating, the second electric heating device is used for heating

If 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 heating device not to heat and the second electric heating device 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 it is not

If 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 heating device to heat and the second electric heating device 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 heating device is used for heating and the first electric heating device is not used for heating, the liquid level detected by the second liquid level sensing element is detected, if the second electric heating device is used for heating, the second liquid level sensing element is used for sensing the liquid level detected by the first liquid level sensing element

If 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 heating device not to heat and the first electric heating device 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 it is not

If 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 heating device to heat when the arithmetic mean of the first data and the second data is lower than the threshold value, and the first electric heating device 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 heating device is in a sufficient heating state or a just heating state, so that the running state of the electric heating device 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 speed 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 heating device 131 and the second electric heating device 132 to alternately heat.

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 heating device heats and the second electric heating device does not heat, 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 heating device not to heat and the second electric heating device to heat; if V1> V2, the controller controls the first electric heating device to heat and the second electric heating device not to heat when the threshold value is lower.

When the second electric heating device heats and the first electric heating device does not heat, 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 heating device not to heat and the first electric heating device to heat; if V1> V2, then below the threshold, the controller controls the second electric heating device to heat and the first electric heating device to not heat.

The current electric heating device 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 heating devices 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 = V2, the heating is judged according to the following cases:

when the first electric heating device heats and the second electric heating device does not heat, if the speed of V1 is greater than the speed of the first data and is lower than the threshold value, the controller controls the first electric heating device not to heat and the second electric heating device 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 heating device to heat and the second electric heating device 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 heating device heats and the first electric heating device does not heat, if the speed of V1 is greater than the speed of the first data and is lower than the threshold value, the controller controls the second electric heating device not to heat and the first electric heating device 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 heating device to heat and the first electric heating device 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-mentioned determination of the speed is also used to determine whether the current electric heating device is in a fully-heated state or a just-heated state, so as to determine the operation state of the electric heating device according to different situations.

Preferably, the number of the speed sensing elements is n, and the speed of the current time period is calculated in sequence

And the previous time speed

Difference of (2)

And for n speed differences

Performing arithmetic cumulative summation

When is coming into contact withYWhen the value of (A) is lower than the set threshold value, the controller controls the electric heating device to stop heating or continue heating.

When the first electric heating device heats and the second electric heating device does not heat, preferably, when Y is greater than 0 and is lower than the threshold value, the controller controls the first electric heating device not to heat and the second electric heating device to heat; if Y <0, the controller controls the first electric heating device to heat and the second electric heating device not to heat when Y is lower than the threshold value.

When the second electric heating device heats and the first electric heating device does not heat, preferably, when Y is greater than 0 and is lower than the threshold value, the controller controls the second electric heating device not to heat and the first electric heating device to heat; if Y <0, the controller controls the second electric heating device to heat and the first electric heating device does not heat when Y is lower than the threshold value.

The current electric heating device is determined to be in a sufficient heating state or a just heating state through the sequential speed judgment, so that the running state of the electric heating device is determined according to different conditions.

Preferably, if Y =0, the heating is judged according to the following:

when the first electric heating device is used for heating and the second electric heating device is not used for heating, if the first electric heating device is used for heating and the second electric heating device is used for heating

If the arithmetic mean of the first data is higher than the speed of the first data, the controller controls the first electric heating device not to heat and the second electric heating device 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 it is not

Is less than the speed of the second data, the controller controls the first electric heating device to heat and the second electric heating device to not heat when 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 heating device is heating and the first electric heating device is not heating, if

Is greater than the speed of the first dataWhen the temperature is lower than the threshold value, the controller controls the second electric heating device not to heat, and the first electric heating device heats; 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 it is not

Is less than the speed of the second data, the controller controls the second electric heating device to heat when the speed is lower than the threshold value, and the first electric heating device 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 also determines whether the current electric heating device is in a heating state or a non-heating state, so that the operation state of the electric heating device is determined according to different situations.

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.

Further preferably, a =1.9821 and b = 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 heating device 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

1. A steam boiler with intelligent communication control of steam flow 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, a flow sensor is arranged on the steam outlet pipe and used for measuring the steam flow output in unit time, and the flow sensor and the electric heating device are in data connection with a controller; the controller automatically controls the power of the electric heating device according to the measured steam flow;

if the measured steam flow is lower than a certain value, the controller controls the electric heating device to increase the heating power;

if the temperature measured by the pressure sensor is higher than a certain value, the controller controls the electric heating device to reduce the heating power.

2. A steam boiler with steam flow intelligent communication control as claimed in claim 1, characterized in that when the measured flow is higher than the first flow, the controller controls the heating power of the electric heating device to be reduced to the first power for heating; when the measured flow is higher than a second flow higher than the first flow, the controller controls the heating power of the electric heating device to be reduced to a second power lower than the first power for heating; when the measured flow is higher than a third flow higher than the second flow, the controller controls the heating power of the electric heating device to be reduced to a third power lower than the second power for heating; when the measured flow is higher than a fourth flow higher than the third flow, the controller controls the heating power of the electric heating device to be reduced to a fourth power higher than the third power for heating; the controller stops the heating of the electric heating device when the measured flow rate is higher than a fifth flow rate that is higher than the fourth flow rate.

3. A steam boiler with intelligent communication control of steam flow according to claim 1, wherein the electric heating device comprises a first steam box, a second steam box and a coil pipe, the coil pipe is communicated with the first steam box and the second steam box to form a closed circulation of heating fluid, and the electric heater is arranged in the first steam 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 liquid level detection device is characterized in that 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 the 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, the liquid level difference or the accumulation of the change of the liquid level difference is obtained through comparison of the 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 and the second electric heater to alternately heat.

4. A steam boiler with steam flow intelligent communication control according to claim 3, wherein 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 L1 if the liquid level in the previous period is L1 and the liquid level in the next following period is L2, and if L1> L2 is lower than the threshold value, the controller controls the first electric heater not to heat and the second electric heater to heat; if L1< L2, when the L1< L2 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 first electric heater does not heat and the second electric heater heats, the liquid level detected by the second liquid level sensing element is preferably controlled by the controller not to heat and the first electric heater heats if the liquid level in the previous time period is L1 and the liquid level in the adjacent subsequent time period is L2 and if L1> L2, the liquid level is lower than the threshold value; if L1< L2, then below the threshold, the controller controls the second electric heater to heat and the first electric heater does not heat.