CN209857522U - Steam-electric hybrid heater, vacuum drying equipment and transformer - Google Patents

Abstract

The present disclosure relates to a steam-electric hybrid heater. The steam-electric hybrid heater comprises a circulating pipeline, a controller, an electric heater and a brazing plate type heat exchanger, wherein the circulating pipeline is connected with a target heated device, and a heat exchange medium is arranged in the circulating pipeline; when the available steam quantity of the steam source is smaller than a preset value, the controller can output a first signal; when the available steam quantity of the steam source is larger than a preset value, the controller can output a second signal; the electric heater is connected with the circulating pipeline and can respond to the first signal to heat the heat exchange medium; the brazing plate type heat exchanger is connected with the circulating pipeline and can respond to the second signal and heat the heat exchange medium according to the steam heat of the steam source. The steam-electric hybrid heater provided by the disclosure can save energy consumption and improve economic benefits.

Description

Gas-electric hybrid heaters, vacuum drying equipment and transformers

technical field

The present disclosure relates to the technical field of vacuum drying equipment, in particular, to a steam-electric hybrid heater, vacuum drying equipment and a transformer.

Background technique

Kerosene vapor phase vacuum drying equipment is suitable for drying and insulating treatment equipment for large-capacity transformers, converter transformers and high-voltage bushings among high-voltage, ultra-high voltage and ultra-high voltage. In the drying process, the heat source is sometimes used as a heat transfer oil electric heater. The heat transfer oil electric heater uses electricity as the energy source and heat transfer oil as the heat exchange medium. The heating element is directly heated in contact with the heat exchange medium, and the high temperature after heating The heat exchange medium uses a high-temperature circulation pump to force liquid phase circulation, and transfers heat to heat-using equipment such as tank walls and evaporators. After passing through the heat-using equipment, part of the heat is released from the heat-exchange medium to heat the body , the unreleased heat returns to the heater together with the heat exchange medium, then absorbs the heat, and transfers it to the heat-using equipment, so that the continuous transfer of heat is realized, and the temperature of the heated object is raised to meet the heating process requirements.

Heat conduction oil electric heaters consume a lot of power and cost very high, while steam is relatively economical, especially the steam generated by power plants, which can be reused. At this time, steam is very affordable, but in winter, especially in the north, residents Heating requires a large amount of steam. At this time, the supply of steam will be insufficient or unstable, which will affect the drying operation of the kerosene vapor phase vacuum drying equipment, and it is difficult to meet the process requirements.

Usually, self-provided boilers are used to solve this problem, but the operating costs have become very high, especially as environmental protection requirements are getting higher and higher, and the operating costs of self-provided boilers are unacceptable, causing adverse effects on the production process and affecting production progress.

It should be noted that the information disclosed in the above background section is only for enhancing the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art.

Contents of the invention

The purpose of the present disclosure is to provide a steam-electric hybrid heater capable of saving energy consumption.

According to one aspect of the present disclosure, there is provided a gas-electric hybrid heater, which includes:

A circulation pipeline is connected to the target heated device, and a heat exchange medium is arranged in the circulation pipeline;

A controller, when the available steam amount of the steam source is less than a preset value, the controller can output a first signal; when the available steam amount of the steam source is greater than a preset value, the controller can output a second signal ;

an electric heater, connected to the circulation pipeline, capable of heating the heat exchange medium in response to the first signal;

A brazed plate heat exchanger, connected to the circulation pipeline, can respond to the second signal and heat the heat exchange medium according to the steam heat of the steam source.

In an exemplary embodiment of the present disclosure, the electric heater and the brazed plate heat exchanger are connected in series on the circulation pipeline.

In an exemplary embodiment of the present disclosure, the heat exchange medium is heat transfer oil.

In an exemplary embodiment of the present disclosure, the steam-electric hybrid heater further includes:

The regulating valve is arranged on the intake pipeline of the brazed plate heat exchanger and is used for regulating the steam flow.

In an exemplary embodiment of the present disclosure, the steam-electric hybrid heater further includes:

The circulation pump is arranged on the circulation pipeline and is used to drive the heat exchange medium to flow in the circulation pipeline.

In an exemplary embodiment of the present disclosure, the steam-electric hybrid heater further includes:

The flow detector is arranged on the circulation pipeline, and is used to obtain the flow rate of the heat exchange medium in the circulation pipeline.

In an exemplary embodiment of the present disclosure, the steam-electric hybrid heater further includes:

At least one temperature measuring device is arranged on the circulation pipeline for obtaining the temperature of the heat exchange medium.

In an exemplary embodiment of the present disclosure, the steam-electric hybrid heater further includes:

An expansion tank is arranged on the circulation pipeline, and the cavity of the expansion tank communicates with the circulation pipeline.

According to another aspect of the present disclosure, there is also provided a vacuum drying device, which includes the steam-electric hybrid heater provided in any one of the above exemplary embodiments.

According to still another aspect of the present disclosure, a transformer is also provided, and the transformer includes the above-mentioned vacuum drying equipment.

In the steam-electric hybrid heater provided by the present disclosure, the two energy sources of steam passing through the brazed plate heat exchanger and electricity passing through the electric heater are used in coordination, and the heat exchange medium is directly heated. The steam heating system is preferred, and the efficiency of the brazed plate heat exchanger is very high. When the steam is sufficient, the temperature of the heat exchange medium will rise rapidly to reach the target temperature. At this time, the electric heater is standby; when the steam is insufficient or unstable, the electric heater is started. The heater, as a supplement to steam, not only makes full use of low-cost energy steam, but also fully overcomes the impact on the production process when steam is insufficient, improves the reliability of the entire electric heater, reduces operating costs, saves resources, and is extremely Greatly improved economic benefits.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure. Apparently, the drawings in the following description are only some embodiments of the present disclosure, and those skilled in the art can obtain other drawings according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a steam-electric hybrid heater provided by an embodiment of the present disclosure.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience, for example, according to the description in the accompanying drawings directions for the example described above. It will be appreciated that if the illustrated device is turned over so that it is upside down, then elements described as being "upper" will become elements that are "lower". When a structure is "on" another structure, it may mean that a structure is integrally formed on another structure, or that a structure is "directly" placed on another structure, or that a structure is "indirectly" placed on another structure through another structure. other structures.

The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements/components/etc; the terms "comprising" and "have" are used to indicate an open The included meaning and means that there may be additional elements/components/etc. in addition to the listed elements/components/etc; A limit on the number of its objects.

The embodiment of the present disclosure provides a steam-electric hybrid heater. As shown in Figure 1, the steam-electric hybrid heater includes a circulation pipeline 101, a controller, an electric heater 103 and a brazed plate heat exchanger 102, the circulation pipeline 101 is connected with the target heated device, and the circulation pipeline 101 is equipped with There is a heat exchange medium; when the available steam amount of the steam source is less than the preset value, the controller can output the first signal; when the available steam amount of the steam source is greater than the preset value, the controller can output the second signal; The heater 103 is connected to the circulation pipeline, and can heat the heat exchange medium in response to the first signal; the brazed plate heat exchanger 102 is connected to the circulation pipeline 101, and can respond to the second signal and exchange heat with the steam heat of the steam source. The medium is heated.

Specifically, the heat exchange medium has two heating methods, and the heat exchange medium can be heated by using the electric heater 103 or the brazed plate heat exchanger 102 . When the available steam amount of the steam source (that is, the amount of steam used to heat the heat exchange medium) is greater than the preset value, the controller outputs a second signal, and the brazed plate heat exchanger 102 responds to the second signal and follows the steam source The steam heat heats the heat exchange medium, that is, steam is passed into the brazed plate heat exchanger 102 to heat the brazed plate heat exchanger 102, and the brazed plate heat exchanger 102 heats the heat exchange medium to a preset temperature through heat conduction , to achieve the purpose of using steam to heat the heat exchange medium; when the available steam volume of the steam source is less than the preset value, the electric heater 103 is used to directly heat the heat exchange medium, so as to avoid the influence on the heating of the heat exchange medium when the steam volume is insufficient , improving the reliability of the heater.

In the steam-electric hybrid heater provided in the present disclosure, the steam passes through the brazed plate heat exchanger 102 and the electricity passes through the electric heater 103 , and the two energy sources are used in coordination, and the heat exchange medium is directly heated. The steam heating system is preferred, and the efficiency of the brazed plate heat exchanger 102 is very high. When the steam is sufficient, the temperature of the heat exchange medium will rise rapidly to reach the target temperature. At this time, the electric heater 103 is standby; when the steam is insufficient or unstable, Start the electric heater 103 as a supplement to the steam, which not only makes full use of low-cost energy steam, but also fully overcomes the impact on the production process when the steam is insufficient, improves the reliability of the entire electric heater 103, and reduces operating costs. Save resources and greatly improve economic benefits.

As shown in FIG. 1 , the electric heater 103 and the brazed plate heat exchanger 102 are connected in series on the circulation pipeline 101 , and are used in conjunction with each other to heat the heat exchange medium.

Specifically, the heat exchange medium is heat transfer oil, such as kerosene. Under the condition of basic normal pressure, the heat transfer oil can obtain a very high operating temperature, which can greatly reduce the operating pressure and safety requirements of the high-temperature heating system, and improve the reliability of the steam-electric hybrid heater; it can be used in a wider temperature range It can meet the process requirements of heating and cooling at different temperatures, or use the same heat transfer oil in the same system to realize the process requirements of high temperature heating and low temperature cooling at the same time, which can reduce the complexity of the system and operation; omit the water treatment system and equipment , improve the thermal efficiency of the system, and reduce the maintenance workload of equipment and pipelines. Certainly, the heat exchange medium of the present disclosure may also be other heat exchange mediums, such as water.

As shown in FIG. 1 , the steam-electric hybrid heater further includes a regulating valve 106 . The regulating valve 106 is set on the intake pipeline of the brazed plate heat exchanger 102 (the arrow in the figure indicates the steam flow direction), and is used to adjust the steam flow, and then realize the control of the heating temperature of the heat exchange medium. In addition, when the steam is insufficient or unstable, the electric heater 103 is started to heat the heat exchange medium, the regulating valve 106 can be closed, so as to improve the precise control of the electric heater 103 on the temperature of the heat exchange medium.

Among them, the regulating valve 106 can be an electric valve or a manual valve, and the electric valve can be used to realize automatic control. The electric valve and the electric heater 103 can be electrically connected with the controller, and the heating mode of the heat exchange medium can be switched by remote operation through the controller. .

As shown in FIG. 1 , the steam-electric hybrid heater also includes a circulating pump 104 . The circulation pump 104 is arranged on the circulation pipeline and is used to drive the heat exchange medium to flow in the circulation pipeline 101 . Specifically, the circulation pump 104 can be electrically connected with the controller, and the controller can control the circulation pump 104 to work, so as to control the flow rate of the circulating liquid in the circulation pipeline 101, so as to control the heating temperature of the target heated device.

The circulating pump 104 can be a vertical, horizontal or other type of circulating pump 104, and those skilled in the art can select a circulating pump 104 with technical parameters meeting requirements according to the flow rate of the heat exchange medium, which is not limited in the present disclosure.

As shown in FIG. 1 , the steam-electric hybrid heater also includes a flow monitor 105 . The flow monitor 105 is arranged on the circulation pipeline 101 and is used for obtaining the flow rate of the heat exchange medium in the circulation pipeline 101 . Specifically, the flow monitor 105 is arranged on the circulation pipeline 101 between the electric heater 103 and the brazed plate heat exchanger 102, of course, the flow monitor 105 can also be arranged on other positions of the circulation pipeline 101, this Applications are not limited to this.

Wherein, the flow monitor 105 is electrically connected with the controller, and the controller can obtain the flow rate of the heat exchange medium obtained by the flow monitor 105, so as to control the circulating pump 104 and the electric heater 103 or the brazed plate heat exchange according to the flow rate of the heat exchange medium. The controller 102 is used to control, so as to further control the heating temperature of the target heated device, and improve the precise control of the heating temperature of the target heated device by the steam-electric hybrid heater.

As shown in FIG. 1 , the steam-electric hybrid heater further includes at least one temperature measuring device. A temperature measuring device is arranged on the circulation pipeline 101 for obtaining the temperature of the heat exchange medium. Specifically, there are multiple temperature measuring devices, which can be installed on the inlet and outlet of the electric heater 103, on the inlet pipeline of the brazed plate heat exchanger 102, and between the target heated device and the brazed plate heat exchanger 102. The circulation pipeline 101 is provided with a temperature measuring device. It should be clear to those skilled in the art that setting more temperature heaters can further strengthen the precise control of the heating temperature of the target heated device. This disclosure does not limit the specific distribution positions of the number of temperature measuring devices. Effect solutions all belong to the protection scope of the present disclosure.

Wherein, the temperature measuring devices are all electrically connected with the controller, and the controller can obtain the temperature value measured by the temperature measuring device, and can adjust the electric heater 103, the circulation pump 104 or the regulating valve 106 according to the temperature value, so as to realize the Accurate control of the heating temperature of the target heated device.

As shown in FIG. 1 , the steam-electric hybrid heater also includes an expansion tank 107 . The expansion tank 107 is arranged on the circulation pipeline 101 , and the cavity of the expansion tank 107 communicates with the circulation pipeline 101 . Specifically, the expansion tank 107 is arranged at a relatively high position, which is higher than the height of the target heated device relative to the installation surface. When the heat exchange medium can be heated to the preset temperature, the volume of the heat exchange medium will increase due to the principle of thermal expansion and cold contraction, and the setting of the expansion tank 107 can accommodate the whole volume of the heat exchange medium after thermal expansion into the expansion tank 107, the heat exchange medium flows back into the circulation pipeline 101 after being cooled.

Wherein, an exhaust hole may be provided on the top of the expansion tank 107 to balance the air pressure in the expansion tank 107 when the heat exchange medium expands with heat and contracts with cold.

In addition, as shown in FIG. 1 , the target heated part includes a tube wall 201 to be heated and an evaporator 202 , and the tube wall 201 and the evaporator 202 are respectively provided with a set of steam-electric hybrid heaters. The steam-electric hybrid heater also includes a heat exchange medium storage 108 , and the steam-electric hybrid heaters of the tube wall 201 and the evaporator 202 may share one heat exchange medium storage 108 , or provide one heat exchange medium storage 108 respectively. A valve 109 is provided on the circulating pipeline 101 connecting the electric heater 103 to the outlet of the heat exchange medium storage 108, and the valve 109 can be closed when the steam-electric hybrid heater stops working or needs maintenance and repair.

In addition, the circulating pump 104, regulating valve 106, temperature measuring device and other equipment of the present disclosure are all high temperature resistant to improve the reliability of the steam-electric hybrid heater.

The present disclosure also provides a vacuum drying device. The vacuum drying equipment includes the above-mentioned steam-electric hybrid heater, and its technical effect can refer to the above-mentioned description of the technical effect of the steam-electric hybrid heater, and will not be repeated here.

The present disclosure also provides a transformer. The transformer includes the above-mentioned vacuum drying equipment. The vacuum drying equipment of the transformer has the technical effect described above for the steam-electric hybrid heater, and uses low-cost steam as the main heating energy, which greatly reduces the power consumption of the heater and reduces the The drying cost of the transformer saves energy consumption, can reduce the operating cost of the transformer, and improves economic benefits.

Other embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, and these modifications, uses or adaptations follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field not disclosed in the present disclosure . The specification and examples are to be considered exemplary only, with the true scope and spirit of the disclosure indicated by the appended claims.

Claims (10)

1. A hybrid steam-electric heater comprising:

the circulating pipeline is connected with the target heated device, and a heat exchange medium is arranged in the circulating pipeline;

the controller can output a first signal when the available steam quantity of the steam source is smaller than a preset value; when the available steam quantity of the steam source is larger than a preset value, the controller can output a second signal;

the electric heater is connected with the circulating pipeline and can respond to the first signal to heat the heat exchange medium;

and the brazing plate type heat exchanger is connected with the circulating pipeline and can respond to the second signal and heat the heat exchange medium according to the steam heat of the steam source.

2. A steam-electric hybrid heater according to claim 1, wherein the electric heater and the brazed plate heat exchanger are connected in series on the circulation line.

3. The steam-electric hybrid heater according to claim 1, wherein the heat exchange medium is heat transfer oil.

4. A hybrid steam-electric heater according to claim 1, further comprising:

and the regulating valve is arranged on the air inlet pipeline of the brazing plate type heat exchanger and used for regulating the steam flow.

5. A hybrid steam-electric heater according to claim 1, further comprising:

and the circulating pump is arranged on the circulating pipeline and used for driving the heat exchange medium to flow in the circulating pipeline.

6. A hybrid steam-electric heater according to claim 1, further comprising:

and the flow detector is arranged on the circulating pipeline and used for acquiring the flow of the heat exchange medium in the circulating pipeline.

7. A hybrid steam-electric heater according to claim 1, further comprising:

and the temperature measurer is arranged on the circulating pipeline and used for obtaining the temperature of the heat exchange medium.

8. A hybrid steam-electric heater according to claim 1, further comprising:

the expansion tank is arranged on the circulating pipeline, and the cavity of the expansion tank is communicated with the circulating pipeline.

9. A vacuum drying apparatus comprising the steam-electric hybrid heater of any one of claims 1 to 8.

10. A transformer, characterized by comprising the vacuum drying apparatus of claim 9.