CN112503972A - Method for monitoring heat exchanger by using cloud water level of three-pipe box - Google Patents

Abstract

The invention provides a method for monitoring a heat exchanger by using a cloud water level of a three-tube box, which comprises a shell, wherein tube plates are respectively arranged at two ends of the shell, a controller is connected with a cloud server, the cloud server is connected with a client, the controller transmits liquid level data measured by a liquid level sensing element to the cloud server and then transmits the liquid level data to the client through the cloud server, the client is a mobile phone, the mobile phone is provided with an APP program, a user can select an automatic control working mode or a manual control working mode at the client, and the controller controls an electric heater to heat according to the working mode selected by the control client so as to descale. According to the invention, through the mobile phone APP client, the automatic control of the heat exchanger through the liquid level is realized through the controller, the energy is saved, the best efficiency is achieved, the intellectualization of the heat exchange system is improved, and the remote portable monitoring is realized.

Description

Method for monitoring heat exchanger by using cloud water level of three-pipe box

Technical Field

The invention relates to a shell-and-tube heat exchanger, in particular to a shell-and-tube heat exchanger for intermittent vibration descaling.

Background

The shell-and-tube heat exchanger is widely applied to industries such as chemical industry, petroleum industry, refrigeration industry, nuclear energy industry and power industry, and due to the worldwide energy crisis, the demand of the heat exchanger in industrial production is more and more, and the quality requirement of the heat exchanger is higher and more. In recent decades, although compact heat exchangers (plate type, plate fin type, pressure welded plate type, etc.), heat pipe type heat exchangers, direct contact type heat exchangers, etc. have been rapidly developed, because the shell and tube type heat exchangers have high reliability and wide adaptability, they still occupy the domination of yield and usage, and according to relevant statistics, the usage of the shell and tube type heat exchangers in the current industrial devices still accounts for about 70% of the usage of all heat exchangers.

After the shell-and-tube heat exchanger is scaled, the heat exchanger is cleaned by adopting conventional modes of steam cleaning, back flushing and the like, and the production practice proves that the effect is not good. The end socket of the heat exchanger can only be disassembled, and a physical cleaning mode is adopted, but the mode is adopted for cleaning, so that the operation is complex, the consumed time is long, the investment of manpower and material resources is large, and great difficulty is brought to continuous industrial production.

The mode of passively strengthening heat exchange is to strictly prevent the fluid vibration induction in the heat exchanger from being changed into effective utilization of vibration, so that the convective heat transfer coefficient of the transmission element at low flow speed is greatly improved, dirt on the surface of the heat transfer element is restrained by vibration, the thermal resistance of the dirt is reduced, and the composite strengthened heat transfer is realized.

In application, it is found that continuous heating can cause the internal fluid to form stability, i.e. the fluid no longer flows or has little fluidity, or the flow is stable, so that the vibration performance of the heat exchange tube is greatly weakened, thereby affecting the descaling of the heat exchange tube and the heating efficiency.

Current shell and tube heat exchangers include dual headers, one header evaporating and one header condensing, thereby forming a vibrating descaled heat pipe. Thereby improving the heat exchange efficiency of the heat pipe and reducing scaling. However, the heat pipe has insufficient uniformity of heat exchange, only one side is used for condensation, and the heat exchange amount is small, so that improvement is needed to develop a heat pipe system with a novel structure. There is therefore a need for improvements to the above-described heat exchangers. In this regard, we have developed a new shell-and-tube heat exchanger capable of generating periodic vibration, and have already filed patent applications.

However, in practice it has been found that adjusting the vibration of the tube bundle by a fixed periodic variation can result in hysteresis and excessively long or short periods. 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 vibration descaling and the heat exchange of heat exchanger have been studied in earlier application, but intelligent degree is not high, can't realize remote control moreover.

Disclosure of Invention

The invention provides an electric heating shell-and-tube heat exchanger with a novel structure, aiming at the defects of the shell-and-tube heat exchanger in the prior art. The shell-and-tube heat exchanger can realize the periodic frequent vibration of the heat exchange tube, and improves the heating efficiency, thereby realizing good descaling and heating effects.

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

a method for monitoring a heat exchanger by using the cloud water level of a three-channel box comprises a shell, wherein tube plates are respectively arranged at two ends of the shell, a heat exchange component is arranged in the shell and comprises a central tube, a left tube, a right tube and a tube group, the tube group comprises a left tube group and a right tube group, the left tube group is communicated with the left tube and the central tube, the right tube group is communicated with the right tube and the central tube, so that the central tube, the left tube, the right tube and the tube group form heating fluid closed circulation, an electric heater is arranged in the central tube, a liquid level detection element is arranged in the central tube and used for detecting the liquid level of fluid in the lower channel box, the liquid level detection element is in data connection with a controller, and the left tube group and the right tube group are in mirror symmetry along; the controller is connected with the cloud server, and the cloud server is connected with the client, and wherein the controller transmits the liquid level data measured by the liquid level sensing element to the cloud server, then transmits the liquid level data to the client through the cloud server, the client is a mobile phone, the APP program is installed on the mobile phone, the user can select the working mode of automatic control or manual control at the client, and the controller controls the heating of the electric heater according to the working mode selected by the control client to descale.

Preferably, in a manual control working mode, a user obtains liquid level data according to a client, a control signal is manually input at the client, and then the control signal is transmitted to the central controller through the cloud server, and the central controller controls the heating of the electric heater according to the signal input by the client.

Preferably, in the automatic control operation mode, the controller controls whether the electric heater performs heating according to the detected liquid level, and if the liquid level detected by the liquid level detecting element is lower than a certain value, the controller controls the electric heater to stop heating. The liquid level detected by the liquid level detection element is higher than a certain value, and the controller controls the electric heater to heat.

Preferably, the number of the pipe groups is multiple, each pipe group comprises a plurality of circular arc-shaped annular pipes, the end parts of the adjacent annular pipes are communicated, the plurality of annular pipes form a serial structure, and the end parts of the annular pipes form free ends of the annular pipes; the central tube comprises a first tube orifice and a second tube orifice, the first tube orifice is connected with the inlet of the left tube group, the second tube orifice is connected with the inlet of the right tube group, the outlet of the left tube group is connected with the left tube, and the outlet of the right tube group is connected with the right tube; the first and second outlets are disposed on opposite sides of the central tube.

The invention has the following advantages:

1. according to the invention, through the mobile phone APP client, the controller realizes remote portable automatic control of liquid level descaling of the heat exchange system, so that energy is saved, the best efficiency is achieved, the intellectualization of heat collection descaling is improved, and the remote control is realized.

2. The liquid level detected by the liquid level detection element can basically reach saturation of the evaporation of the internal fluid and basically does not change the volume of the internal fluid under the condition of meeting a certain liquid level (such as the lowest limit). So that the fluid undergoes volume reduction to thereby realize vibration. When the liquid level rises to a certain degree, the internal fluid starts to enter a stable state again, and at the moment, the fluid needs to be heated so as to evaporate and expand again, so that the electric heater needs to be started for heating.

3. The invention provides a vibrating tube bundle shell-and-tube heat exchanger with a novel structure, which increases the vibration range of a tube bundle by arranging more tube groups in a limited space, thereby strengthening heat transfer and enhancing descaling.

4. The heating efficiency can be further improved by the arrangement of the pipe diameter and the interval distribution of the pipe groups in the length direction.

5. The invention optimizes the optimal relationship of the parameters of the shell-and-tube heat exchanger through a large amount of experiments and numerical simulation, thereby realizing the optimal heating efficiency.

6. The invention designs a triangular layout diagram of a multi-heat exchange component with a novel structure, optimizes the structural parameters of the layout, and can further improve the heating efficiency through the layout.

Description of the drawings:

fig. 1 is a schematic view of a housing structure.

Fig. 2 is a top view of a heat exchange member of the present invention.

Fig. 3 is a front view of the heat exchange member of the present invention.

Fig. 4 is a front view of another embodiment of a heat exchange member of the present invention.

Fig. 5 is a dimensional structure schematic diagram of the heat exchange component of the invention.

Fig. 6 is a schematic layout of the heat exchange member of the present invention in a circular cross-section heater.

In the figure: 1. the heat exchanger comprises a tube group, a left tube group 11, a right tube group 12, 21, a left tube 22, a right tube 3, a free end 4, a free end 5, a free end 6, a free end 7, a ring tube 8, a central tube 9, an electric heater, a first tube orifice 10, a second tube orifice 13, a left return tube 14, a right return tube 15, a front tube plate 16, a support 17, a support 18, a rear tube plate 19, a shell 20, a shell 21, a shell inlet connecting tube 22, a shell outlet connecting tube and a heat exchange component 23.

Detailed Description

A shell-and-tube heat exchanger, as shown in fig. 1, comprises a shell 20, a heat exchange component 23, a shell-side inlet connecting pipe 21 and a shell-side outlet connecting pipe 22; the heat exchange component 23 is arranged in the shell 20 and fixedly connected to the front tube plate 16 and the rear tube plate 19; the shell side inlet connecting pipe 21 and the shell side outlet connecting pipe 22 are both arranged on the shell 20; fluid enters from the shell side inlet connecting pipe 21, exchanges heat through the heat exchange part and exits from the shell side outlet connecting pipe 22.

Preferably, the heating member extends in a horizontal direction. The heat exchanger is arranged in the horizontal direction.

Fig. 2 shows a top view of a heat exchange part 23, which comprises a central tube 8, a left tube 21, a right tube 22 and tube groups 1, wherein the tube groups 1 comprise a left tube group 11 and a right tube group 12, the left tube group 11 is communicated with the left tube 21 and the central tube 8, the right tube group 12 is communicated with the right tube 22 and the central tube 8, so that the central tube 8, the left tube 21, the right tube 22 and the tube groups 1 form a closed circulation of heating fluid, the central tube 8 is filled with phase change fluid, an electric heater 9 is arranged in the central tube 8, each tube group 1 comprises a plurality of circular arc-shaped annular tubes 7, the ends of the adjacent annular tubes 7 are communicated, so that the plurality of annular tubes 7 form a serial structure, and the ends of the annular tubes 7 form free ends 3-6 of the annular tubes; the central tube comprises a first tube orifice 10 and a second tube orifice 13, the first tube orifice 10 is connected with the inlet of the left tube group 11, the second tube orifice 13 is connected with the inlet of the right tube group 12, the outlet of the left tube group 11 is connected with the left tube 21, and the outlet of the right tube group 12 is connected with the right tube 22; the first orifice 10 and the second orifice 13 are arranged on opposite sides of the central tube 8. The left tube group and the right tube group are in mirror symmetry along the plane of the axis of the central tube.

The ends of the two ends of the center tube 8, the left tube 21 and the right tube 22 are disposed in the openings of the front and rear tube plates 16, 19 for fixation.

Preferably, a left return pipe 14 is arranged between the left pipe 21 and the central pipe 8, and a right return pipe 15 is arranged between the right pipe 22 and the central pipe 8. Preferably, the return pipe is arranged at the end of the central pipe. Both ends of the central tube are preferred.

The fluid is heated and evaporated in the central tube 8, flows to the left and right headers 21 and 22 along the annular tube bundle, and is heated to expand in volume, so that steam is formed, and the volume of the steam is far larger than that of water, so that the formed steam can flow in the coil in a rapid impact manner. Because of volume expansion and steam flow, the free end of the annular tube can be induced to vibrate, the vibration is transmitted to the surrounding heat exchange fluid by the free end of the heat exchange tube in the vibration process, and the fluid can also generate disturbance, so that the surrounding heat exchange fluid forms disturbance flow, a boundary layer is damaged, and the purpose of enhancing heat transfer is realized. The fluid is condensed and released heat in the left and right side pipes and then flows back to the central pipe through the return pipe.

According to the invention, the prior art is improved, and the condensation collecting pipe and the pipe groups are respectively arranged into two pipes which are distributed on the left side and the right side, so that the pipe groups distributed on the left side and the right side can perform vibration heat exchange descaling, the heat exchange vibration area is enlarged, the vibration can be more uniform, the heat exchange effect is more uniform, the heat exchange area is increased, and the heat exchange and descaling effects are enhanced.

Preferably, the annular pipes of the left pipe group are distributed by taking the axis of the left pipe as the center of a circle, and the annular pipes of the right pipe group are distributed by taking the axis of the right pipe as the center of a circle. The left side pipe and the right side pipe are arranged as circle centers, so that the distribution of the annular pipes can be better ensured, and the vibration and the heating are uniform.

Preferably, the tube group is plural.

Preferably, the position of the right tube group (including the right tube) is mirror symmetry of the plane in which the left tube group (including the left tube) lies along the axis of the center tube. Through such setting, can make the annular pipe distribution of heat transfer reasonable more even, improve the heat transfer effect.

Preferably, the headers 8, 21, 22 are provided along the longitudinal direction.

Preferably, the left tube group 21 and the right tube group 22 are staggered in the longitudinal direction, as shown in fig. 3. Through the staggered distribution, can make to vibrate heat transfer and scale removal on different length for the vibration is more even, strengthens heat transfer and scale removal effect.

Preferably, the tube group 1 is provided in plural (for example, the same side (left side or right side)) along the length direction of the center tube 8, and the tube diameter of the tube group 1 (for example, the same side (left side or right side)) becomes larger along the flow direction of the fluid in the shell side.

Preferably, the pipe diameter of the annular pipe of the pipe group (for example, the same side (left side or right side)) is increased along the flowing direction of the fluid in the shell side.

The pipe diameter range through the heat exchange tube increases, can guarantee that shell side fluid outlet position fully carries out the heat transfer, forms the heat transfer effect like the adverse current, further strengthens the heat transfer effect moreover for 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 tube group on the same side (left side or right side) is provided in plural along the length direction of the center tube 8, and the distance between the adjacent tube groups on the same side (left side or right side) becomes smaller along the flow direction of the fluid in the shell side.

Preferably, the spacing between the tube banks on the same side (left or right) in the direction of fluid flow in the shell side is increased by a decreasing amount.

The interval amplitude through the heat exchange tube increases, can guarantee that shell side fluid outlet position fully carries out the heat transfer, forms the heat transfer effect like the adverse current, further strengthens the heat transfer effect moreover 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.

In tests it was found that the pipe diameters, distances and pipe diameters of the left side pipe 21, the right side pipe 22, the central pipe 8 and the pipe diameters of the ring pipes can have an influence on the heat exchange efficiency and the uniformity. If the distance between the collector is too big, then heat exchange efficiency is too poor, and the distance between the ring shape pipe is too little, then the ring shape pipe distributes too closely, also can influence heat exchange efficiency, and the pipe diameter size of collector and heat exchange tube influences the volume of the liquid or the steam that holds, then can exert an influence to the vibration of free end to influence the heat transfer. Therefore, the pipe diameters and distances of the left pipe 21, the right pipe 22, the central pipe 8 and the pipe diameters of the ring pipes have a certain relationship.

The invention provides an optimal size relation summarized by numerical simulation and test data of a plurality of heat pipes with different sizes. Starting from the maximum heat exchange amount in the heat exchange effect, nearly 200 forms are calculated. The dimensional relationship is as follows:

the distance between the center of the central tube 8 and the center of the left tube 21 is equal to the distance between the center of the central tube 8 and the center of the right tube 22, L, the tube diameter of the left tube 21, the tube diameter of the central tube 8 and the radius of the right tube 22 are R, the radius of the axis of the innermost annular tube in the annular tubes is R1, and the radius of the axis of the outermost annular tube is R2, so that the following requirements are met:

R1/R2= a × Ln (R/L) + b; where a, b are parameters and Ln is a logarithmic function, where 0.6212< a <0.6216, 1.300< b < 1.301; preferably, a is 0.6214 and b is 1.3005.

Preferably, 35< R <61 mm; 114< L <190 mm; 69< R1<121mm, 119< R2<201 mm.

Preferably, the number of annular tubes of the tube set is 3-5, preferably 3 or 4.

Preferably, 0.55< R1/R2< 0.62; 0.3< R/L < 0.33.

Preferably, 0.583< R1/R2< 0.615; 0.315< R/L < 0.332.

Preferably, the radius of the annular tube is preferably 10-40 mm; preferably 15 to 35mm, more preferably 20 to 30 mm.

Preferably, the centers of the left tube 21, the right tube 22 and the center tube 8 are on a straight line.

Preferably, the arc between the ends of the free ends 3, 4 around the centre axis of the left tube is 95-130 degrees, preferably 120 degrees. The same applies to the curvature of the free ends 5, 6 and the free ends 3, 4. Through the design of the preferable included angle, the vibration of the free end is optimal, and therefore the heating efficiency is optimal.

Preferably, the heat exchange component can be used as an immersed heat exchange assembly, and immersed in a fluid to heat the fluid, for example, the heat exchange component can be used as an air radiator heating assembly, and can also be used as a heat exchanger heating assembly.

The heating power of the electric heater is preferably 1000-2000W, and more preferably 1500W.

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.

Preferably, the tube bundle of the tube bank 1 is an elastic tube bundle.

The heat exchange coefficient can be further improved by arranging the tube bundle of the tube group 1 with an elastic tube bundle.

Further preferably, the electric heater is an electric heating rod.

The number of the pipe groups 1 is multiple, and the plurality of pipe groups 1 are in a parallel structure.

The heat exchanger shown in fig. 6 has a circular cross-sectional housing in which the plurality of heat exchange members are disposed. Preferably, the number of the heat exchange components is three, the center of the central tube of each heat exchange component is positioned in an inscribed regular triangle with a circular cross section, the connecting lines of the centers of the central tubes form a regular triangle, the upper part of each central tube is provided with one heat exchange component, the lower part of each central tube is provided with two heat exchange components, and the connecting lines formed by the centers of the left tube, the right tube and the central tube of each heat exchange component are of a parallel structure. Through such setting, can make the interior fluid of heater fully reach vibrations and heat transfer purpose, improve the heat transfer effect.

Learn through numerical simulation and experiment, heat transfer part's size and circular cross-section's diameter have very big influence to the heat transfer effect, heat transfer part size too big can lead to adjacent interval too little, the space that the centre formed is too big, middle heating effect is not good, the heating is inhomogeneous, on the same way, heat transfer part size undersize can lead to adjacent interval too big, leads to whole heating effect not good. Therefore, the invention obtains the optimal size relation through a large amount of numerical simulation and experimental research.

The distance between the centers of the left side pipe and the right side pipe is L1, the side length of the inscribed regular triangle is L2, the radius of the axis of the innermost annular pipe in the annular pipes is R1, and the radius of the axis of the outermost annular pipe is R2, so that the following requirements are met:

10*(L1/L2)=d*(10*R1/R2)-e*(10*R1/R2)²-f; wherein d, e, f are parameters,

44.102<d<44.110,3.715<e<3.782,127.385<f<127.395；

further preferably, d =44.107, e =3.718, f = 127.39;

with 720< L2<1130mm preferred. Preferably 0.58< R1/R2< 0.62.

Further preferred is 0.30< L1/L2< 0.4.

Preferably, the centers of the left tube 21, the right tube 22 and the center tube 8 are on a straight line.

Through the layout of the three heat exchange component structure optimization, the whole heat exchange effect can reach the best heat exchange effect.

It has been found in research and practice that a constant and stable heat source results in a fluid-forming stability of the internal heat exchange components, i.e. the fluid no longer flows or flows little, or the flow is stable, resulting in a considerable reduction of the vibration performance of the tube bank 1, which affects the efficiency of the descaling and heating of the tube bank 1. Therefore, the following improvements are required for the heat pipe.

In the prior application of the inventor, a periodic heating mode is provided, and the vibration of the heat exchange pipe is continuously promoted by the periodic heating mode, so that the heating efficiency and the descaling effect are improved. 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 heat exchanger capable of intelligently controlling vibration. The heat exchanger can improve the heating efficiency, thereby realizing good descaling and heating effects.

Self-regulation vibration based on pressure

Preferably, a pressure detection element is arranged inside the heat exchange component and used for detecting the pressure inside the heat exchange component, the pressure detection element is in data connection with the controller, the controller is connected with the cloud server, the cloud server is connected with the client, the controller transmits pressure data measured by the pressure sensing element to the cloud server, the pressure data are transmitted to the client through the cloud server, the client is a mobile phone, an APP program is installed on the mobile phone, a user can select an automatic control or manual control working mode at the client, and the controller controls the heating of the electric heater according to the working mode selected by the control client.

Preferably, in the manual control working mode, a user obtains pressure data according to the client, a control signal is manually input at the client, and then the control signal is transmitted to the central controller through the cloud server, and the central controller controls the heating of the electric heater according to the signal input by the client.

Preferably, in the automatic control operation mode, the controller controls whether the electric heater performs heating or not according to the detected pressure.

According to the invention, through the mobile phone APP client, the controller realizes automatic control of the heat exchanger through pressure, so that energy is saved, the best efficiency is achieved, the intellectualization of the heat exchange system is improved, and remote portable monitoring is realized.

Preferably, in the automatic control operation mode, the controller controls whether the electric heater performs heating or not according to the detected pressure. Preferably, the controller controls the electric heater to stop heating if the pressure detected by the pressure detecting element is higher than a certain value, and controls the electric heater to heat if the pressure detected by the pressure detecting element is lower than a certain value.

The pressure detected by the pressure detecting element can basically reach saturation when the certain pressure is met, and the volume of the internal fluid is not changed greatly basically. So that the fluid undergoes volume reduction to thereby realize vibration. When the pressure is reduced to a certain degree, the internal fluid starts to enter a stable state again, and at the moment, the fluid needs to be heated so as to evaporate and expand again, so that the electric heater needs to be started for heating.

Preferably, the pressure detecting elements are arranged in the central tube 8 and/or the left side tube 21 and/or the right side tube 22.

Preferably, the pressure detecting elements are disposed within the center tube 8 and the left and right side tubes 21 and 22. The average of the pressures of the three channel boxes can be selected as regulating data.

Preferably, the pressure detecting element is provided at the free end. Through setting up at the free end, can perceive the pressure variation of free end to realize better control and regulation.

Independently adjusting vibration based on temperature

Preferably, the temperature detection element is arranged in the heat exchange component and used for detecting the temperature in the heat exchange component, the temperature detection element is in data connection with the controller, the controller is connected with the cloud server, the cloud server is connected with the client, the controller transmits temperature data measured by the temperature sensing element to the cloud server, the temperature data are transmitted to the client through the cloud server, the client is a mobile phone, the APP program is installed on the mobile phone, the user can select an automatic control or manual control working mode at the client, and the controller controls the heating of the electric heater according to the working mode selected by the control client.

Preferably, in the manual control working mode, the user obtains temperature data according to the client, a control signal is manually input at the client, and then the control signal is transmitted to the central controller through the cloud server, and the central controller controls the heating of the electric heater according to the signal input by the client.

Preferably, in the automatic control operation mode, the controller controls whether the electric heater performs heating or not according to the detected temperature.

According to the invention, through the mobile phone APP client, the controller realizes automatic control of the heat exchanger through temperature, so that energy is saved, the best efficiency is achieved, the intellectualization of the heat exchange system is improved, and remote portable monitoring is realized.

Preferably, in the automatic control operation mode, the controller controls whether the electric heater performs heating or not according to the detected temperature. Preferably, the controller controls the electric heater to stop heating if the temperature detected by the temperature detecting element is higher than a certain value, and controls the electric heater to heat if the temperature detected by the temperature detecting element is lower than a certain value.

The temperature detected by the temperature detecting element can basically reach saturation of the evaporation of the internal fluid and basically does not change much the volume of the internal fluid under the condition of meeting a certain temperature, and in this case, the internal fluid is relatively stable, and the vibration of the tube bundle at the moment is poor, so that adjustment is needed to enable the tube bundle to vibrate, and heating is stopped. So that the fluid undergoes volume reduction to thereby realize vibration. When the temperature is reduced to a certain degree, the internal fluid starts to enter a stable state again, and the fluid needs to be heated to evaporate and expand again, so that the electric heater needs to be started for heating.

Preferably, the temperature detecting element is provided at an upper end disposed in the center tube 8 and/or the left side tube 21 and/or the right side tube 22.

Preferably, the temperature detecting elements are provided at the upper ends of the center tube 8 and the left and right side tubes 21 and 22.

Preferably, the temperature detection element is provided at the free end. Through setting up at the free end, can perceive the temperature variation of free end to realize better control and regulation.

Thirdly, automatically adjusting vibration based on liquid level

As preferred, 8 inside liquid level detection element that set up of center tube for detect the liquid level of the fluid in the lower tube case, liquid level detection element carries out data connection with the controller, the high in the clouds server is connected to the controller, and the high in the clouds server is connected with the client, and wherein the controller transmits the liquid level data that liquid level perception element measured for the high in the clouds server, then sends the client to through the high in the clouds server, the client is the cell-phone, cell-phone installation APP program, user can select automatic control or manual control's mode at the client, and the controller controls electric heater's heating according to the mode of control customer selection.

Preferably, in a manual control working mode, a user obtains liquid level data according to a client, a control signal is manually input at the client, and then the control signal is transmitted to the central controller through the cloud server, and the central controller controls the heating of the electric heater according to the signal input by the client.

Preferably, in the automatic control operation mode, the controller controls whether the electric heater performs heating according to the detected liquid level.

According to the invention, through the mobile phone APP client, the automatic control of the heat exchanger through the liquid level is realized through the controller, the energy is saved, the best efficiency is achieved, the intellectualization of the heat exchange system is improved, and the remote portable monitoring is realized.

Preferably, in the automatic control operation mode, the controller controls whether the electric heater performs heating according to the detected fluid level. Preferably, the controller controls the electric heater to stop heating if the liquid level detected by the liquid level detecting element is lower than a certain value. The liquid level detected by the liquid level detection element is higher than a certain value, and the controller controls the electric heater to heat.

The liquid level detected by the liquid level detecting element can be adjusted to vibrate the tube bundle so as to stop heating under the condition that a certain liquid level (for example, the lowest limit) is met, the evaporation of the internal fluid is basically saturated, and the volume of the internal fluid is basically not changed greatly. So that the fluid undergoes volume reduction to thereby realize vibration. When the liquid level rises to a certain degree, the internal fluid starts to enter a stable state again, and at the moment, the fluid needs to be heated so as to evaporate and expand again, so that the electric heater needs to be started for heating.

Fourthly, automatically adjusting vibration based on speed

Preferably, a speed detection element is arranged in the free end of the tube bundle and used for detecting the flow velocity of fluid in the free end of the tube bundle, the speed detection element is in data connection with a controller, the controller is connected with a cloud server, the cloud server is connected with a client, the controller transmits speed data measured by a speed sensing element to the cloud server and then transmits the speed data to the client through the cloud server, the client is a mobile phone, an APP program is installed on the mobile phone, a user can select an automatic control or manual control working mode at the client, and the controller controls the heating of the electric heater according to the working mode selected by the control client.

Preferably, in the manual control working mode, the user obtains speed data according to the client, a control signal is manually input at the client, and then the control signal is transmitted to the central controller through the cloud server, and the central controller controls the heating of the electric heater according to the signal input by the client.

Preferably, in the automatic control operation mode, the controller controls whether the electric heater performs heating according to the detected speed.

According to the invention, through the mobile phone APP client, the controller realizes automatic control of the heat exchanger through speed, so that energy is saved, the best efficiency is achieved, the intellectualization of the heat exchange system is improved, and remote portable monitoring is realized.

Preferably, in the automatic control operation mode, the controller controls whether the electric heater performs heating according to the detected speed of the fluid. Preferably, the controller controls the electric heater to stop heating if the speed detected by the speed detecting element is higher than a certain value. The speed detected by the speed detecting element is lower than a certain value, and the controller controls the electric heater to heat.

The speed detected by the speed detecting element can be adjusted to vibrate the tube bundle to stop heating, because the internal fluid is relatively stable and the tube bundle is deteriorated in vibration property in the case where the evaporation of the internal fluid is substantially saturated to form a stable flow and the speed of the internal fluid is not substantially changed when a certain speed (for example, the highest upper limit) is satisfied. So that the fluid undergoes volume reduction to thereby realize vibration. When the speed drops to a certain degree, the internal fluid starts to enter a stable state again, and at the moment, the fluid needs to be heated so as to evaporate and expand again, so that the electric heater needs to be started for heating.

Preferably, the heat exchanger comprises a descaling process, and the heat exchange is carried out in the descaling process in the manner described above.

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 (5)

1. A method for monitoring a heat exchanger by using the cloud water level of a three-channel box comprises a shell, wherein tube plates are respectively arranged at two ends of the shell, a heat exchange component is arranged in the shell and comprises a central tube, a left tube, a right tube and a tube group, the tube group comprises a left tube group and a right tube group, the left tube group is communicated with the left tube and the central tube, the right tube group is communicated with the right tube and the central tube, so that the central tube, the left tube, the right tube and the tube group form heating fluid closed circulation, an electric heater is arranged in the central tube, a liquid level detection element is arranged in the central tube and used for detecting the liquid level of fluid in the lower channel box, the liquid level detection element is in data connection with a controller, and the left tube group and the right tube group are in mirror symmetry along; the controller is connected with the cloud server, and the cloud server is connected with the client, and wherein the controller transmits the liquid level data measured by the liquid level sensing element to the cloud server, then transmits the liquid level data to the client through the cloud server, the client is a mobile phone, the APP program is installed on the mobile phone, the user can select the working mode of automatic control or manual control at the client, and the controller controls the heating of the electric heater according to the working mode selected by the control client to descale.

2. The method of claim 1, wherein in the manual control mode of operation, the user obtains level data from the client, manually inputs control signals at the client, and transmits the control signals to the central controller via the cloud server, and the central controller controls the heating of the electric heater according to the signals input by the client.

3. The method of claim 1, wherein in the automatic control operation mode, the controller controls whether the electric heater performs heating according to the detected liquid level, and if the liquid level detected by the liquid level detecting element is lower than a certain value, the controller controls the electric heater to stop heating; the liquid level detected by the liquid level detection element is higher than a certain value, and the controller controls the electric heater to heat.

4. The method of claim 1, wherein the plurality of tube sets are provided, each tube set comprising a plurality of annular tubes in the shape of a circular arc, the ends of adjacent annular tubes being in communication, such that the plurality of annular tubes form a series arrangement, and such that the ends of the annular tubes form the free ends of the annular tubes; the central tube comprises a first tube orifice and a second tube orifice, the first tube orifice is connected with the inlet of the left tube group, the second tube orifice is connected with the inlet of the right tube group, the outlet of the left tube group is connected with the left tube, and the outlet of the right tube group is connected with the right tube; the first and second outlets are disposed on opposite sides of the central tube.

5. A shell-and-tube heat exchanger is characterized by comprising a plurality of circular arc-shaped annular tubes, wherein the end parts of the adjacent annular tubes are communicated, so that the annular tubes form a series structure.

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