Electric heat exchange equipment and control method thereof

Abstract

The invention relates to the technical field of energy storage, and particularly provides electric heat exchange equipment and a control method thereof. The heat conduction cylinder is sequentially provided with a feeding port, a material cavity and a discharging port in the axial direction of the heat conduction cylinder. The feeding port and the discharging port are both communicated with the material cavity, the feeding port is configured to input a solid material with a first temperature into the material cavity from the outside, the discharging port is configured to output a solid material with a second temperature from the inside of the material cavity to the outside, and the first temperature is lower than the second temperature; a spiral component is arranged on the inner cavity wall of the material cavity; the electric heating piece is sleeved outside the heat conduction cylinder; the electric heating piece is configured to emit heat when being electrified to heat the solid material in the material cavity from a first temperature to a second temperature; the driving end of the electric driving piece is in transmission connection with the heat conduction cylinder; the electric driving part is configured to drive the heat conduction barrel to rotate when powered on, so that the spiral part drives the solid material in the material cavity to move in the axial direction of the heat conduction barrel. According to the electric heat exchange equipment and the control method thereof, efficient heating can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to an electric heat exchange device and a control method thereof. BACKGROUND

[0002] In recent years, with the rapid development of new energy, the installed capacity and power generation of new energy have increased significantly. However, the inherent randomness and volatility of new energy power have brought great difficulties to new energy consumption and grid dispatching. In order to solve the problems of consumption and dispatching, steam or gravity is usually used for energy storage in the prior art, which has a short storage time and high cost. Unlike steam or gravity energy storage, sand is abundant in raw materials, has extremely low cost, and is resistant to high temperature, and theoretically can realize long-time energy storage. However, sand has poor thermal conductivity, and heat is easily accumulated on the surface, making it difficult to synchronize the internal temperature, and thus high-efficiency heating cannot be achieved. SUMMARY

[0003] The electric heat exchange device and the control method thereof provided by the embodiments of the present application at least solve the problem that the internal and external temperatures are not synchronized during sand heating in the prior art, and high-efficiency heating can be achieved.

[0004] In a first aspect, the present application provides an electric heat exchange device, comprising a heat-conducting cylinder, the heat-conducting cylinder is sequentially provided with a feeding port, a material cavity and a discharging port along the axial direction of the heat-conducting cylinder; the feeding port and the discharging port are both communicated with the material cavity, the feeding port is configured to input solid material at a first temperature into the material cavity from the outside, the discharging port is configured to output the solid material at a second temperature from the material cavity to the outside, the first temperature is lower than the second temperature; a spiral component is arranged on the inner cavity wall of the material cavity; an electric heating element, the electric heating element is sleeved outside the heat-conducting cylinder; the electric heating element is configured to generate heat when powered on, so as to heat the solid material in the material cavity from the first temperature to the second temperature; an electric driving element, the driving end of the electric driving element is in transmission connection with the heat-conducting cylinder; the electric driving element is configured to drive the heat-conducting cylinder to rotate when powered on, so that the spiral component drives the solid material in the material cavity to move along the axial direction of the heat-conducting cylinder.

[0005] In an embodiment of the present application, the electric heating element comprises a plurality of electric heating sub-components, and the plurality of electric heating sub-components are sequentially arranged along the axial direction of the heat-conducting cylinder; the heating temperatures of the plurality of electric heating sub-components are configured to gradually decrease along the moving direction of the solid material.

[0006] In an embodiment of the present application, further comprising a heat storage material element, the heat storage material element is arranged on the side of the discharging port of the heat-conducting cylinder; the heat storage material element is provided with a storage inlet, and the storage inlet is communicated with the discharging port.

[0007] In one embodiment of the present application, a blower is further included, and a distribution plate is arranged between the air outlet of the blower and the storage inlet, and the distribution plate is used to carry the solid material into the storage; and the blower is configured to blow air when powered on, so that the air passes through the distribution plate and drives the solid material on the distribution plate to flow.

[0008] In one embodiment of the present application, a heat exchange member is further included, and the heat exchange member is in communication with the storage; and a heat exchange pipe is arranged inside the heat exchange member, and the heat exchange pipe is used to arrange a fluid material; wherein the solid material flows and releases heat, and the heat enters the heat exchange member and heats the fluid material in the heat exchange pipe.

[0009] In one embodiment of the present application, a power generation impeller is further included, and the power generation impeller is arranged below the storage in a vertical direction; the storage is provided with a storage outlet, and the storage outlet is in communication with the power generation impeller; the power generation impeller is configured to be rotatable; and a generator is further included, and a rotor of the generator is in driving connection with a wheel shaft of the power generation impeller; wherein the solid material flows and falls, drives the power generation impeller to rotate, and makes the generator generate power.

[0010] In one embodiment of the present application, a heat preservation member is further included, and the heat preservation member is sleeved outside the electric heating member.

[0011] In a second aspect, the present application further provides a control method of an electric heat exchange device, which is applied to the electric heat exchange device as described in any one of the above aspects, and includes the following steps: solid material at a first temperature is input into a material cavity of a heat conduction cylinder from outside through a feeding port of the heat conduction cylinder; wherein the heat conduction cylinder is further provided with a discharging port, the feeding port, the material cavity and the discharging port are sequentially arranged along an axis of the heat conduction cylinder, the feeding port and the discharging port are both in communication with the material cavity, and a spiral component is arranged on an inner cavity wall of the material cavity; an electric heating member is sleeved outside the heat conduction cylinder, and a driving end of an electric driving member is in driving connection with the heat conduction cylinder; the electric heating member is controlled to be powered on and heated, so as to heat the solid material in the material cavity from the first temperature to a second temperature; wherein the first temperature is lower than the second temperature; the electric driving member is controlled to be powered on and drive the heat conduction cylinder to rotate, so that the spiral component drives the solid material in the material cavity to move along the axis of the heat conduction cylinder; and the solid material at the second temperature is output from the material cavity to the outside.

[0012] In one embodiment of the present application, the method further comprises the step of: controlling the blower to be powered to blow air, so that the air passes through the air distribution plate and drives the solid material on the air distribution plate to flow; wherein the air distribution plate is arranged between the air outlet of the blower and the storage inlet of the heat storage material, the heat storage material is arranged on one side of the discharge port of the heat conducting cylinder, the storage inlet is communicated with the discharge port, and the air distribution plate is used to carry the solid material into the heat storage material.

[0013] In one embodiment of the present application, the method further comprises the step of: the solid material flows and releases heat, and the heat enters the heat exchanger and heats the fluid material; wherein the heat exchanger is communicated with the heat storage material, and the heat exchanger is internally provided with a heat exchange pipe, and the fluid material is arranged in the heat exchange pipe.

[0014] In one embodiment of the present application, the method further comprises the step of: the solid material flows and falls from the storage outlet of the heat storage material to the power generation impeller, drives the power generation impeller to rotate, and makes the generator generate electricity; wherein, in the vertical direction, the power generation impeller is arranged below the heat storage material; and the rotor of the generator is in driving connection with the wheel shaft of the power generation impeller.

[0015] The above technical scheme of the present application has the following beneficial effects compared with the prior art:

[0016] The electric heat exchange equipment disclosed by the present application, through the cooperation of the heat conducting cylinder, the electric heating element and the electric driving element, can fully heat the solid material when heating the solid material, and is very efficient. In this way, the solid material is used to exchange heat and store heat when the power grid generation load is sufficient. When the subsequent power grid generation load is insufficient and energy needs to be provided, heat can be used to generate electricity. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 is a partial structure schematic view of the electric heat exchange equipment in the preferred embodiment of the present application.

[0019] Figure 2 is a structure schematic view of the electric heat exchange equipment in the preferred embodiment of the present application.

[0020] Figure 3 is a flow schematic view of the control method of the electric heat exchange equipment in the preferred embodiment of the present application.

[0021] The above-mentioned drawings include the following reference signs: 11, heat-conducting cylinder; 111, feeding port; 112, material cavity; 1121, spiral part; 113, discharging port; 12, electric heating element; 121, first sub-component; 122, second sub-component; 13, electric driving element; 14, heat-insulating element; 20, heat-storing material element; 21, material storage inlet; 22, material storage outlet; 23, air distribution plate; 30, air blower; 40, heat exchange element; 41, heat exchange pipe; 51, power generation impeller; 52, power generator. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0023] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a presence of a feature, step, operation, device, component, and / or combination thereof.

[0024] Unless specifically stated otherwise, the relative arrangements of the components and steps illustrated in these embodiments and the numerical expressions and values set forth in the examples are not meant to limit the scope of the present application. It should also be understood that the size of the various parts shown in the drawings can not be to scale for ease of illustration. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the present disclosure. In all examples shown and discussed herein, any specific value should be interpreted as merely an example, and not as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar reference signs and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0025] Reference Figure 1 and Figure 2 As shown in the drawings, the electric heat exchange device according to the embodiments of the present application comprises a heat-conducting cylinder 11, an electric heating element 12, and an electric driving element 13.

[0026] The heat-conducting cylinder 11 is preferably made of a metal material that is wear-resistant and high-temperature-resistant, thereby prolonging the service life of the cylinder. Exemplarily, the inner diameter of the heat-conducting cylinder 11 is set to 800 mm, and the length thereof can be set according to actual requirements.

[0027] The heat-conducting cylinder 11 is sequentially provided with a feeding port 111, a material cavity 112 and a discharging port 113 along an axial direction of the heat-conducting cylinder 11, and the feeding port 111 and the discharging port 113 are both communicated with the material cavity 112. The feeding port 111 is configured to input the solid material at a first temperature into the material cavity 112 from outside.

[0028] Preferably, the solid material is sand, which is very common in desert areas, low in cost and resistant to high temperature, and can achieve long-term energy storage after heating. In some other embodiments, other solids such as rocks and cinder can also be selected. The first temperature is preferably the ambient temperature of the device.

[0029] Preferably, the feeding port 111 is arranged at a radial center of the heat-conducting cylinder 11, and a feeding pipe is arranged at the feeding port 111 to connect an external device and input the solid material into the material cavity 112 of the heat-conducting cylinder 11. The bottom of the feeding pipe can be provided with a support to prevent the feeding pipe from deforming.

[0030] Exemplarily, the solid material can be input in cooperation with a negative pressure device, and an auxiliary anti-reverse spiral flow preventer is used to prevent the solid material from flowing backward.

[0031] The electric heating element 12 is sleeved outside the heat-conducting cylinder 11. The electric heating element 12 is configured to generate heat when powered on to heat the solid material in the material cavity 112 from the first temperature to a second temperature. The first temperature is lower than the second temperature, and the second temperature is preferably set to 800-900℃.

[0032] Preferably, the electric heating element 12 is a silicon carbide heating element, which has good high-temperature resistance, high heating temperature and large heating intensity, and can well heat the solid material such as sand. In actual use, the sand can be heated from the ambient temperature to 850℃ in a relatively short time by powering the silicon carbide heating element, thereby achieving heat storage and storing a large amount of heat.

[0033] In this way, the high-temperature sand can be used for heating steam in the subsequent process to provide high-parameter steam, which can be used for power generation, heat supply and the like. The parameters of the high-parameter steam mainly refer to pressure and temperature, and the steam with high pressure and high temperature is high-parameter steam.

[0034] Preferably, the electric heating element 12 also has a cylindrical structure, and the axial dimension of the cylindrical electric heating element 12 is smaller than the axial dimension of the heat-conducting cylinder 11.

[0035] The electric driving element 13 is arranged outside the heat-conducting cylinder 11, and a driving end of the electric driving element 13 is in transmission connection with the heat-conducting cylinder 11. The electric driving element 13 is configured to drive the heat-conducting cylinder 11 to rotate when powered on, so as to drive the solid material in the material cavity 112 to move along the axial direction of the heat-conducting cylinder 11 by the screw component 1121.

[0036] Preferably, the electric driving part 13 comprises a driving motor and a transmission part, preferably a chain transmission part. Under the action of the driving motor, the reducer and other parts, the chain transmission part drives the guide cylinder to rotate around the central axis thereof. Preferably, an electric control box and control instruments are arranged to realize the control of various electrical appliances.

[0037] For example, a plurality of groups of bases and rolling bearings can be arranged. The outer ring of the rolling bearing is fixedly connected with the base, and the inner ring of the rolling bearing is fixedly connected with the guide cylinder, so as to cooperate with the electric driving part 13 to realize the rotation of the heat conducting cylinder 11. At the same time, a blocking wheel can be arranged to limit the movement of the heat conducting cylinder 11 along the axial direction thereof, and a height adjusting part can be arranged to adjust the height of the heat conducting cylinder 11, so that the heat conducting cylinder 11 remains horizontal or inclined.

[0038] A spiral part 1121 is arranged on the inner cavity wall of the material cavity 112. Preferably, the spiral part 1121 is arranged as a spiral fin, which is welded to the inner cavity wall of the material cavity 112. The spiral fin is arranged towards the discharge port 113 of the heat conducting cylinder 11. In this way, under the rotation of the heat conducting cylinder 11, the spiral fin drives the solid material in the material cavity to advance spirally, which not only enables the solid material to move axially relative to the heat conducting cylinder 11, but also enables the solid material to be turned over, thereby being fully heated, realizing efficient electric heating.

[0039] Preferably, the heat conducting cylinder 11 is arranged horizontally. In the case where the heat conducting cylinder 11 does not rotate, even if solid material is input into the material cavity 112 thereof, the solid material will reach a gravitational balance and be blocked after being stacked to a certain height, and will not move towards the discharge port 113 relative to the heat conducting cylinder 11. However, in the case where the heat conducting cylinder 11 rotates, the solid material in the material cavity 112 can move towards the discharge port 113 relative to the heat conducting cylinder 11 under the driving of the spiral part 1121. In this process, the solid material absorbs heat and warms up.

[0040] Preferably, the device is also provided with a temperature sensor to detect the temperature of the internal solid material. In the case where the temperature of the solid material does not reach the ideal value, the rotation speed of the heat conducting cylinder 11 can be reduced to prolong the heating time, realizing sufficient heating. After the solid material reaches the second temperature, the rotation speed of the heat conducting cylinder 11 can be appropriately increased to discharge the current solid material.

[0041] Preferably, a shut-off valve and an expansion joint structure are arranged on the side of the material cavity 112 close to the discharge port 113 to avoid the influence of high temperature expansion on the device. The shut-off valve can be a manual high temperature gate valve to adapt to high working temperature.

[0042] The discharge port 113 is configured to output the solid material at the second temperature from the material cavity 112 to the outside. After being heated by the electric heating part 12, the solid material warms up, at which time it can be discharged from the material cavity 112 and sent to other areas to realize heat supply or storage.

[0043] The outlet 113 is preferably an open structure with a flange outwardly folded to the heat conduction cylinder 11. A collector can be arranged at the side of the outlet 113 of the heat conduction cylinder 11. The collector is also provided with a flange, which is relatively inwardly folded. The flange of the collector cooperates with the flange of the heat conduction cylinder 11 to achieve sealing. The collector is hollow inside to communicate with the outlet 113 to discharge the solid material. The bottom of the collector can also be provided with a support to achieve support. In this way, the structure is simple, and the operation and maintenance cost is low.

[0044] When the power grid generation load is sufficient and energy needs to be stored, room temperature sand can be input to the heat conduction cylinder 11, and then the electric heating element 12 and the electric driving element 13 are started. Under the action of the electric driving element 13, the heat conduction cylinder 11 rotates around the center axis thereof, and then the helical fin drives the sand to move. In the process of moving the sand, the sand is affected by the heat of the electric heating element 12 and the temperature rises. Due to the rotation of the heat conduction cylinder 11 and the action of the helical fin, the sand can be fully heated and the temperature can be raised to 900°C. When the sand moves to the outlet 113, it can still maintain a high temperature of about 800°C. Subsequently, the hot sand can be stored for subsequent use.

[0045] The electric heat exchange device disclosed by the application cooperates the heat conduction cylinder 11, the electric heating element 12 and the electric driving element 13. When heating the solid material, the rotation of the heat conduction cylinder 11 and the helical component 1121 in the material cavity 112 of the heat conduction cylinder 11 can fully heat the solid material, which is very efficient. In this way, the solid material is used to exchange heat and store heat when the power grid generation load is sufficient. When the power grid generation load is insufficient and energy needs to be provided, the heat can be used to generate electricity.

[0046] Referring to Figure 1 In some embodiments, the electric heating element 12 includes a plurality of electric heating sub-components. The plurality of electric heating sub-components are arranged in sequence along the axial direction of the heat conduction cylinder 11. The heating temperatures of the plurality of electric heating sub-components are configured to gradually decrease along the moving direction of the solid material.

[0047] For example, only two electric heating sub-components are provided, which are a first sub-component 121 and a second sub-component 122. The heating temperature of the first sub-component 121 is lower than that of the second sub-component 122. Along the axial direction of the heat conduction cylinder 11, the first sub-component 121 is arranged at the side of the heat conduction cylinder 11 relatively close to the inlet 111, and the second sub-component 122 is arranged at the side of the heat conduction cylinder 11 relatively close to the outlet 113.

[0048] When the solid material just enters the material cavity 112, the temperature of the solid material is room temperature, which is relatively low. Therefore, the solid material is heated by the first sub-component 121 with a higher heating temperature to increase the temperature of the solid material in a short time. After the heating by the first sub-component 121, the temperature of the solid material has been increased, and the solid material does not need to be heated at a high temperature. Therefore, the second sub-component 122 with a relatively low heating temperature is used to heat or heat-keep the solid material. In this way, the segmented temperature control is realized, and the electric energy required for heating the solid material is saved.

[0049] Referring to Figure 1 As shown in the figure, the electric heat exchange device of the present application further comprises a heat-keeping member 14, which is sleeved outside the electric heating member 12. Preferably, the heat-keeping member 14 is provided in a cylindrical structure, and the axial size of the cylindrical electric heating member 12 is smaller than the axial size of the cylindrical heat-keeping member 14, so as to prevent heat loss and ensure good heat exchange effect.

[0050] Referring to Figure 2 As shown in the figure, the electric heat exchange device of the present application further comprises a heat storage member 20, which is arranged at the side of the discharge port 113 of the heat conduction cylinder 11. The heat storage member 20 is provided with a storage inlet 21, which is communicated with the discharge port 113. After the solid material is heated to the required second temperature, the solid material can be stored. Directly arranging the heat storage member 20 beside the heat conduction cylinder 11 can effectively reduce heat loss during transportation. Preferably, the heat storage member 20 is provided with a heat-keeping structure to reduce heat loss of the solid material as much as possible.

[0051] Further, referring to Figure 2 As shown in the figure, the electric heat exchange device of the present application further comprises a blower 30, which is configured to blow air when powered on. The blower 30 belongs to the prior art, and its working principle will not be described here.

[0052] The outlet of the blower 30 and the storage inlet 21 are provided with a wind distribution plate 23, which is used to carry the solid material into the heat storage member 20. The wind distribution plate 23 is provided with a plurality of micropores, and the pore size of the micropores is smaller than the size of the solid material. When the heat exchange is not needed, the solid material is directly carried by the wind distribution plate 23 to realize heat storage. When the power grid power generation load is insufficient and energy needs to be provided, the blower 30 is started, the blower 30 blows air, the air uniformly passes through the wind distribution plate 23, and the solid material on the wind distribution plate 23 is driven to flow, so that the heat of the solid material is fully dissipated.

[0053] Further, referring to Figure 2As shown, the electric heat exchange device according to the present application, in some embodiments, further comprises a heat exchange member 40, which is connected to the heat storage material member 20. The heat exchange member 40 is internally provided with a heat exchange pipe 41, which is used to set a fluid material.

[0054] Under the cooperation of the air blower 30 and the air distribution plate 23, the heat of the solid material is emitted. Part of the heat enters the heat exchange member 40 and heats the heat exchange pipe 41 and the fluid material inside the heat exchange pipe 41, so that the fluid material becomes high-parameter steam, and thus the high-parameter steam can be used to generate electricity or provide heat.

[0055] Preferably, the heat exchange member 40 further comprises a pressure gauge, a thermal resistance and the like components, to realize the monitoring of the pressure and temperature parameters of the heat exchange pipe 41.

[0056] Referring to Figure 2 As shown, the electric heat exchange device according to the present application, in some embodiments, further comprises a power generation impeller 51 and a power generator 52. The power generation impeller 51 is configured to be rotatable, and the rotor of the power generator 52 is in driving connection with the shaft of the power generation impeller 51. The power generation impeller 51 comprises a plurality of blades, and when the blades are subjected to force, the power generation impeller 51 rotates around the central axis thereof.

[0057] In the vertical direction, the power generation impeller 51 is arranged below the heat storage material member 20. The heat storage material member 20 is provided with a storage outlet 22, which is connected to the power generation impeller 51.

[0058] Under the cooperation of the air blower 30 and the air distribution plate 23, the solid material not only emits heat, but also moves relative to the air distribution plate 23. Thus, part of the solid material falls from the storage outlet 22 to the power generation impeller 51 below, driving the power generation impeller 51 to rotate. Thus, the rotation of the power generation impeller 51 makes the power generator 52 generate electricity, converting the gravitational potential energy of the solid material into electrical energy. Through the arrangement of the structure, the organic combination of heat storage energy and mechanical energy storage can be realized, the energy storage density can be improved, and efficient energy storage and conversion can be realized.

[0059] On the other hand, referring to Figure 3 As shown, the present application further provides a control method of an electric heat exchange device, which is applied to the electric heat exchange device according to any one of the above embodiments. The control method of the electric heat exchange device comprises the following steps:

[0060] Firstly, solid materials at a first temperature are inputted into the material cavity 112 of the heat conduction cylinder 11 from outside through the material inlet 111 of the heat conduction cylinder 11. The heat conduction cylinder 11 is further provided with a material outlet 113, and the material inlet 111, the material cavity 112 and the material outlet 113 are sequentially arranged along the axis of the heat conduction cylinder 11, the material inlet 111 and the material outlet 113 are both communicated with the material cavity 112, and the inner cavity wall of the material cavity 112 is provided with a spiral component 1121. The outer part of the heat conduction cylinder 11 is sleeved with an electric heating element 12, and the driving end of an electric driving element 13 is drivingly connected with the heat conduction cylinder 11.

[0061] Secondly, in one aspect, the electric heating element 12 is controlled to be powered and heated to heat the solid materials in the material cavity 112 from the first temperature to a second temperature. The first temperature is lower than the second temperature.

[0062] In another aspect, the electric driving element 13 is controlled to be powered and drive the heat conduction cylinder 11 to rotate, so that the spiral component 1121 drives the solid materials in the material cavity 112 to move along the axis of the heat conduction cylinder 11.

[0063] Finally, the solid materials at the second temperature are outputted from the material cavity 112 to the outside.

[0064] The control method of the electric heat exchange equipment, in some embodiments, further comprises the steps of:

[0065] The air blower 30 is controlled to be powered and air is blown out to make the air pass through the air distribution plate 23 and drive the solid materials on the air distribution plate 23 to flow. The air distribution plate 23 is arranged between the air outlet of the air blower 30 and the material inlet 21 of the heat storage material element 20, the heat storage material element 20 is arranged on the side of the material outlet 113 of the heat conduction cylinder 11, the material inlet 21 is communicated with the material outlet 113, and the air distribution plate 23 is used to carry the solid materials entering the heat storage material element 20.

[0066] Further, the control method of the electric heat exchange equipment, in some embodiments, further comprises the steps of:

[0067] The solid materials flow and release heat, and the heat enters the heat exchange element 40 and heats the fluid materials. The heat exchange element 40 is communicated with the heat storage material element 20, the heat exchange element 40 is internally provided with a heat exchange pipe 41, and the heat exchange pipe 41 is internally provided with the fluid materials.

[0068] Further, the control method of the electric heat exchange equipment, in some embodiments, further comprises the steps of:

[0069] The solid materials flow and fall from the material outlet 22 of the heat storage material element 20 to the power generation impeller 51, drive the power generation impeller 51 to rotate, and make the generator 52 generate electricity. In the vertical direction, the power generation impeller 51 is arranged below the heat storage material element 20. The rotor of the generator 52 is drivingly connected with the shaft of the power generation impeller 51.

[0070] Working principle:

[0071] When the power grid generation load is sufficient and energy needs to be stored, the room temperature sand is input to the heat conducting cylinder 11, and then the electric heating element 12 and the electric driving element 13 are started. Under the action of the electric driving element 13, the heat conducting cylinder 11 rotates around the center axis of the heat conducting cylinder 11, and then the helical fin drives the sand to move. In the process of sand moving, the sand is affected by the heat of the electric heating element 12 and the temperature rises. Due to the rotation of the heat conducting cylinder 11 and the action of the helical fin, the sand can be fully heated and the temperature can be raised to 900 DEG C. When the sand moves to the discharge port 113, it can still maintain a high temperature of about 800 DEG C. The heated sand is discharged from the discharge port 113 and enters the heat storage material 20, realizing storage.

[0072] When the power grid generation load is insufficient and energy needs to be provided, the air blower 30 is started, the air blower 30 blows air, the air uniformly passes through the air distribution plate 23 and drives the sand on the air distribution plate 23 to flow.

[0073] On the one hand, the heat of the sand is fully dissipated under the action of the wind, and part of the heat enters the heat exchange element 40 and heats the heat exchange pipe 41 and the fluid material inside the heat exchange pipe 41, so that the fluid material becomes high-parameter steam, so that high-parameter steam can be used to generate electricity or heat.

[0074] On the other hand, part of the sand moves relative to the air distribution plate 23 and falls from the storage outlet 22 to the power generation impeller 51 below, drives the power generation impeller 51 to rotate, and makes the generator 52 generate electricity, converting the gravitational potential energy of the sand into electrical energy.

[0075] For the convenience of description, spatial relative terms such as "above", "upper", "on", "upper surface", "upper", etc. can be used here to describe the spatial positional relationship of one device or feature with other devices or features as shown in the figure. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the figure. For example, if the device in the drawing is inverted, the device described as "above" or "above" other devices or structures will be positioned "below" or "below" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used here is interpreted accordingly.

[0076] In addition, it should be noted that the use of "first", "second", and the like words to qualify parts is merely for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0077] The above only is the preferred embodiment of the present application, and is not used to limit the present application, and for those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electric heat exchange device, characterized by, Comprise: A heat-conducting cylinder, which is sequentially provided with an inlet, a cavity and an outlet along its own axial direction; The inlet and the outlet are both communicated with the cavity, the inlet is configured to input solid material at a first temperature into the cavity from the outside, the outlet is configured to output the solid material at a second temperature from the cavity to the outside, the first temperature is lower than the second temperature; a spiral component is arranged on the inner cavity wall of the cavity; An electric heating element, which is sleeved outside the heat-conducting cylinder; the electric heating element is configured to generate heat when powered on, so as to heat the solid material in the cavity from the first temperature to the second temperature; An electric driving element, the driving end of which is in transmission connection with the heat-conducting cylinder; the electric driving element is configured to drive the heat-conducting cylinder to rotate when powered on, so that the spiral component drives the solid material in the cavity to move along the axial direction of the heat-conducting cylinder.

2. The electric heat exchange device according to claim 1, wherein: The electric heating element comprises a plurality of electric heating sub-components, which are sequentially arranged along the axial direction of the heat-conducting cylinder; the heating temperature of the plurality of electric heating sub-components is configured to gradually decrease along the moving direction of the solid material.

3. The electrothermal exchange apparatus of claim 1, wherein, Further comprise: A heat storage material element, which is arranged on the side of the outlet of the heat-conducting cylinder; The heat storage material element is provided with a storage inlet, which is communicated with the outlet.

4. The electrothermal exchange apparatus of claim 3, wherein, Further comprise: A blower, which is provided with a wind distribution plate between its air outlet and the storage inlet, the wind distribution plate is used to carry the solid material entering the heat storage material element; the blower is configured to blow air when powered on, so that the air passes through the wind distribution plate and drives the solid material on the wind distribution plate to flow.

5. The electrothermal exchange apparatus of claim 4, wherein, Further comprise: A heat exchange element, which is communicated with the heat storage material element; the inside of the heat exchange element is provided with a heat exchange pipe, which is used to arrange fluid material; Wherein, the solid material flows and releases heat, the heat enters the heat exchange element and heats the fluid material in the heat exchange pipe.

6. The electrothermal exchange apparatus of claim 4, wherein, Further comprise: A power generation impeller, which is arranged below the heat storage material element in the vertical direction, the heat storage material element is provided with a storage outlet, which is communicated to the power generation impeller; the power generation impeller is configured to be rotatable; and, A generator, the rotor of which is in transmission connection with the shaft of the power generation impeller; Wherein, the solid material flows and falls, driving the power generation impeller to rotate, so that the generator generates electricity.

7. The electrothermal exchange apparatus of claim 1, wherein, Further comprise: A heat preservation element, which is sleeved outside the electric heating element.

8. An electric heat exchanger control method applied to the electric heat exchanger according to any one of claims 1 to 7, characterized by, Comprise steps: Input solid material at a first temperature from the outside into the cavity of the heat-conducting cylinder through its inlet; wherein, the heat-conducting cylinder is also provided with an outlet, the inlet, the cavity and the outlet are sequentially arranged along the axial direction of the heat-conducting cylinder, the inlet and the outlet are both communicated with the cavity, a spiral component is arranged on the inner cavity wall of the cavity; an electric heating element is sleeved outside the heat-conducting cylinder, the driving end of an electric driving element is in transmission connection with the heat-conducting cylinder; controlling the electric heating member to be electrified and heated to heat the solid material in the material cavity from the first temperature to a second temperature; wherein the first temperature is lower than the second temperature; controlling the electric driving member to be electrified and drive the heat-conducting cylinder to rotate, so that the screw component drives the solid material in the material cavity to move along the axial direction of the heat-conducting cylinder; the solid material at the second temperature is output from the material cavity to the outside.

9. The electric heat exchange apparatus control method according to claim 8, wherein Further comprising steps: controlling the air blower to be electrified and air to be blown out, so that the air passes through the air distribution plate and drives the solid material on the air distribution plate to flow; wherein the air distribution plate is arranged between the material storage inlet of the heat storage material member and the air outlet of the air blower, the heat storage material member is arranged on one side of the material outlet of the heat-conducting cylinder, the material storage inlet is communicated with the material outlet, and the air distribution plate is used to carry the solid material entering the heat storage material member.

10. The electric heat exchange apparatus control method according to claim 8, wherein Further comprising steps: the solid material flows and releases heat, and the heat enters the heat exchange member and heats the fluid material; wherein the heat exchange member is communicated with the heat storage material member, the heat exchange member is internally provided with a heat exchange pipe, and the heat exchange pipe is internally provided with the fluid material; Or / and, the solid material flows and falls from the material storage outlet of the heat storage material member to the power generation impeller, drives the power generation impeller to rotate, and makes the generator generate electricity; wherein in the vertical direction, the power generation impeller is arranged below the heat storage material member; and the rotor of the generator is in transmission connection with the wheel shaft of the power generation impeller.

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