CN111998534B - Heat conduction oil heating device - Google Patents
Heat conduction oil heating device Download PDFInfo
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- CN111998534B CN111998534B CN202010887163.1A CN202010887163A CN111998534B CN 111998534 B CN111998534 B CN 111998534B CN 202010887163 A CN202010887163 A CN 202010887163A CN 111998534 B CN111998534 B CN 111998534B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
- F24H7/0208—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using electrical energy supply
- F24H7/0233—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using electrical energy supply the transfer fluid being water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
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Abstract
The invention relates to a heat-conducting oil heating device which comprises a heating furnace, heat-conducting oil furnaces, a conveying pipeline, a heating furnace temperature measuring module and a control system, wherein each heat-conducting oil furnace is used for heating the heat-conducting oil in the heat-conducting oil furnace to different set temperatures; the conveying pipeline is connected with a conveying pump and a pipeline valve in series and used for conveying heat conduction oil to the heating furnace by each heat conduction oil furnace; the control system is connected with the heating furnace temperature measuring module, and can adjust the flow of heat conducting oil conveyed to the heating furnace by each heat conducting oil furnace through controlling the conveying pump and/or the pipeline valve according to the temperature information measured by the heating furnace temperature measuring module so as to adjust the temperature of the heating furnace. When the heat conduction oil heating device is used, heat conduction oil with a good heat conduction effect transfers heat to the workpiece, the heat conduction oil heating device is high in heat conduction speed and uniform in heating effect, the processing efficiency can be improved, and the heat conduction oil heating device consumes less energy when in operation.
Description
Technical Field
The invention relates to a heat conducting oil heating device.
Background
The processing of the polymer is a necessary process for converting the polymer raw material into a practical product, and is very important for the application of the polymer material. For high polymer materials which are easy to decompose at high temperature, have high melt viscosity and poor fluidity, a sintering molding processing method is adopted for processing: a process of heating the powder or powder compact to a temperature below the melting point of its basic components and then cooling to room temperature at a certain method and rate. In the manufacturing stage of sintering, heating is usually required in a plurality of stages to raise the mold temperature in a certain gradient. In the prior art, an electric heating air heating furnace is generally used for heating in sintering processing, an electric heating element is arranged in the electric heating air heating furnace, and the electric heating element heats a mold in a heat radiation, convection and conduction mode. In the heating process, the power of the electric heating element can be changed to realize gradient heating on the die, but because the heat conductivity of air is poor, when the electric heating air heating furnace is used for gradient heating, the heating speed is slow, so that the sintering time is long, the operation energy consumption of the electric heating air heating furnace is high, and the processing efficiency is low; in addition, the temperature field distribution in the electric heating air furnace is uneven, so that the mold is easy to have uneven heating phenomena of over-burning on the surface and under-burning in the interior.
Disclosure of Invention
The invention aims to provide a heat-conducting oil heating device which can solve the problems of low heating speed, high device energy consumption, low processing efficiency and uneven heating effect when an electric heating air heating furnace in the prior art carries out gradient heating.
The heat conducting oil heating device adopts the following technical scheme:
conduction oil heating device includes:
a heating furnace for accommodating and heating a workpiece;
the heat conduction oil furnaces are provided with at least two heat conduction oil furnaces, and each heat conduction oil furnace is used for heating the heat conduction oil in the heat conduction oil furnace to different set temperatures;
the conveying pipeline is connected with a conveying pump and a pipeline valve in series and used for connecting each heat-conducting oil furnace with the heating furnace and respectively conveying heat-conducting oil to the heating furnace;
the heating furnace temperature measuring module is used for measuring the temperature of the heating furnace;
and the control system is connected with the heating furnace temperature measuring module and can adjust the flow of the heat conduction oil conveyed to the heating furnace by each heat conduction oil furnace through controlling the conveying pump and/or the pipeline valve according to the temperature information measured by the heating furnace temperature measuring module so as to adjust the temperature of the heating furnace.
Has the advantages that: the heat conducting oil heating device of the invention skillfully utilizes two or more heat conducting oil furnaces with different set temperatures to respectively supply heat conducting oil to the heating furnace, thereby realizing the gradient change of the temperature in the heating furnace, because the heat conducting oil which is heated to the set temperature in the heat conducting oil furnace can be directly injected into the heating furnace to heat the workpiece, and the heat conducting oil has higher heat transfer speed when conducting heat to the workpiece, in conclusion, the heat conducting oil heating device of the invention can accelerate the heating speed, reduce the energy consumption of the heat conducting oil furnace, and also improve the processing efficiency of the workpiece, and in the invention, the heat conducting oil enters the heating furnace to heat the workpiece after being heated, the temperature field distribution in the heating oil furnace can be more uniform by utilizing the flow of the heat conducting oil, the heating effect of the workpiece is more uniform, the phenomena of over-burning on the surface and under-burning in the interior are improved, and the quality of the workpiece is improved, the problem that when an electric heating air heating furnace in the prior art carries out gradient heating, the heating speed is low, the energy consumption of the device is high, the processing efficiency is low, and the heating effect is uneven can be solved.
Furthermore, the conveying pipeline comprises a conveying main pipe and conveying branch pipes, the number of the conveying branch pipes is the same as that of the heat-conducting oil furnace, the conveying branch pipes are connected to the heat-conducting oil furnace in a one-to-one correspondence mode, the other end of each conveying branch pipe is connected with the conveying main pipe, the other end of each conveying branch pipe is connected with the heating furnace, the conveying pump is connected to the conveying main pipe in series, and the pipeline valves are connected to the conveying branch pipes in series.
Has the advantages that: the conveying pipeline adopts the structure, the number of the conveying pumps in the conveying pipeline is less, the conveying pipeline structure can be simplified, and the cost of the conveying pipeline is reduced.
Further, the conveying main pipe is connected with the upper part of the heating furnace.
Has the advantages that: when the conveying main pipe is connected with the upper part of the heating furnace, the capacity of the conveying pump is smaller, and the energy consumption of the conveying pump is reduced.
Furthermore, the heat conduction oil heating device comprises an overflow pipe connected between the heating furnace and each heat conduction oil furnace, and the overflow pipe is used for enabling the heat conduction oil in the heating furnace to flow back to each heat conduction oil furnace.
Has the beneficial effects that: the waste heat of the returned heat conduction oil can be utilized for the second time, and the operation energy consumption of the heat conduction oil furnace can be saved.
Furthermore, the control system adjusts the flow of the heat conduction oil conveyed to the heating furnace by each heat conduction oil furnace by controlling the conveying pump.
Has the advantages that: the conveying pump has good durability, so that the flow control function of the heat conduction oil heating device is more reliable.
Furthermore, the heat-conducting oil heating device comprises a heat-conducting oil furnace temperature measuring module for measuring the temperature of each heat-conducting oil furnace, the heat-conducting oil furnace temperature measuring module is connected with the control system, and the control system can control the heating power of the heat-conducting oil furnace according to the temperature information measured by the heat-conducting oil furnace temperature measuring module so as to adjust the temperature in each heat-conducting oil furnace.
Has the advantages that: the temperature in the heat conduction oil furnace is kept at the set temperature all the time, and the flow of the heat conduction oil supplied to the heating furnace is convenient to adjust.
Furthermore, the heat-conducting oil heating device comprises a circulating pump, and the circulating pump is respectively connected with the lower part and the upper part of the heating furnace through circulating pipelines and is used for enabling the heat-conducting oil in the heating furnace to circularly flow.
Has the advantages that: the circulating valve can enable heat conduction oil at each position in the heating furnace to carry out circulating heat exchange, so that the temperature of the heat conduction oil at each position is kept consistent, and the heating effect on the workpiece is more uniform.
Furthermore, the circulating pump is connected with the control system so that the control system can adjust the circulating speed of the heat conducting oil in the heating furnace by controlling the circulating pump.
Has the advantages that: the arrangement is favorable for the control system to adjust the temperature in the heating furnace.
Furthermore, a heat-insulating layer is arranged outside the heating furnace.
Has the advantages that: the energy loss of the heating furnace is reduced, the temperature in the heating furnace is kept, the heating speed is accelerated, and the energy consumption of the heat-conducting oil furnace can be saved.
Drawings
FIG. 1 is a schematic view of the structure of a thermal oil heating apparatus according to an embodiment 1 of the present invention;
in the figure: 1-DCS control panel; 2-heating furnace; 31-low temperature heat conduction oil furnace; 32-high temperature heat-conducting oil furnace; 4-a circulating pump; 5-a delivery pump; 6-low temperature heat conducting oil electromagnetic valve; 8-high temperature heat conducting oil electromagnetic valve; 9-low temperature heat conducting oil reflux valve; 10-high temperature heat conducting oil reflux valve; 11-a flow control module; 12-a temperature sensor; 13-low temperature heat conducting oil temperature control module; 14-high temperature heat conducting oil temperature control module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
the heat conduction oil heating device disclosed by the invention comprises a heating furnace 2, a control system and a heat conduction oil furnace as shown in figure 1. The control system is a DCS control system, and the heating furnace 2 is internally used for accommodating workpieces. The heat conduction oil furnace is equipped with two, is low temperature heat conduction oil furnace 31 and high temperature heat conduction oil furnace 32 respectively, and its inside is used for holding the conduction oil, all is equipped with the electric heating element that carries out the heating to its inside conduction oil on low temperature heat conduction oil furnace 31 and the high temperature heat conduction oil furnace 32, and low temperature heat conduction oil furnace 31 and high temperature heat conduction oil furnace 32 can be used to supply with the conduction oil respectively in to heating furnace 2 to heat the work piece. For the purpose of gradient heating, the set temperatures in the two heat transfer oil furnaces are different, and the set temperature in the high-temperature heat transfer oil furnace 32 is higher than the set temperature in the low-temperature heat transfer oil furnace 31.
In order to convey heat conduction oil in each heat conduction oil furnace to the heating furnace 2, a conveying pipeline for connecting each heat conduction oil furnace and the heating furnace 2 is arranged in the heat conduction oil heating device, the conveying pipeline comprises a conveying main pipe and two conveying branch pipes, the conveying branch pipes are respectively a low-temperature conveying branch pipe and a high-temperature conveying branch pipe, the upstream end of the low-temperature conveying branch pipe is connected with the low-temperature heat conduction oil furnace 31, the upstream end of the high-temperature conveying branch pipe is connected with the high-temperature heat conduction oil furnace 32, the downstream end of the low-temperature conveying branch pipe and the downstream end of the high-temperature conveying branch pipe are converged at one position and then connected with the conveying main pipe, and the other end of the conveying main pipe is connected with the upper part of the heating furnace 2. The low-temperature conveying branch pipe and the high-temperature conveying branch pipe are connected in series with a low-temperature heat conduction oil electromagnetic valve 6 and a high-temperature heat conduction oil electromagnetic valve 8, and can be used for respectively controlling the on-off of the low-temperature conveying branch pipe and the high-temperature conveying branch pipe. The conveying main pipe is connected with a conveying pump 5 in series, and the flow of the heat conduction oil in the conveying main pipe can be changed by adjusting the flow of the conveying pump 5. In this embodiment, the low-temperature heat transfer oil electromagnetic valve 6 and the high-temperature heat transfer oil electromagnetic valve 8 form a line valve.
The upper end of heating furnace 2 is equipped with the overflow mouth, is connected with the overflow pipe between overflow mouth and the two heat conduction oil stoves, and the overflow pipe includes overflow house steward and overflow branch, and the overflow branch is equipped with two, and overflow house steward one end is connected with the overflow mouth, and the other end and two overflow branch intercommunication of being connected with two heat conduction oil stoves respectively set up the overflow pipe and can flow back the heat conduction oil that overflows in heating furnace 2 to two heat conduction oil stoves. And a low-temperature heat conduction oil return valve 9 for controlling the overflow heat conduction oil to flow to the low-temperature heat conduction oil furnace 31 and a high-temperature heat conduction oil return valve 10 for controlling the overflow heat conduction oil to flow to the high-temperature heat conduction oil furnace 32 are respectively arranged on the two overflow branch pipes. Through the arrangement of the conveying pipeline and the overflow pipe, the heat conduction oil in the heat conduction oil furnace can circularly flow between the two heat conduction oil furnaces and the heating furnace, and the residual heat of the overflow heat conduction oil can reduce the energy consumption of the heat conduction oil heated by the heat conduction oil furnaces.
To implement the automatic multi-stage heating function, in one aspect, the DCS control system is capable of controlling a plurality of execution units, such as: the DCS control system comprises a DCS control panel 1 and a flow control module 11, the flow control module 11 is respectively connected with the DCS control panel 1 and the conveying pump 5, the DCS control panel 1 can control the flow of the conveying pump 5 through the flow control module 11, and then the flow of heat conduction oil conveyed to the heating furnace 2 by the conveying pipeline is adjusted. In addition, the DCS control panel 1 is connected to the low temperature heat transfer oil solenoid valve 6 and the high temperature heat transfer oil solenoid valve 8, respectively (not shown in the figure), and controls opening and closing of the low temperature heat transfer oil solenoid valve 6 and the high temperature heat transfer oil solenoid valve 8. The DCS control panel is also connected to the low temperature heat transfer oil reflux valve 9 and the high temperature heat transfer oil reflux valve 10, and can be used to control the opening and closing of the low temperature heat transfer oil reflux valve 9 and the high temperature heat transfer oil reflux valve 10 (not shown in the figure). In this embodiment, the low-temperature heat transfer oil electromagnetic valve 6, the high-temperature heat transfer oil electromagnetic valve 8, the transfer pump 5, the low-temperature heat transfer oil return valve 9, and the high-temperature heat transfer oil return valve 10 are all execution units controlled by the DCS control system.
On the other hand, this heating system is equipped with heating furnace temperature measurement module for in time feed back the temperature information of heating furnace to DCS control panel 1, make things convenient for DCS control panel 1 to respond through each execution unit according to feedback information. The heating furnace temperature measuring module comprises a temperature sensor 12, and the temperature sensor 12 is installed on the heating furnace 2 and used for measuring the temperature of the heating furnace 2.
Because in the heating process, the heat conduction oil overflowing into the two heat conduction oil furnaces can change the original set temperature in the low-temperature heat conduction oil furnace and the high-temperature heat conduction oil furnace, the heat conduction oil in the heat conduction oil furnace is always kept at the original set temperature, the flow of the heat conduction oil supplied to the heating furnace 2 is convenient to adjust, a heat conduction oil furnace temperature measurement module is arranged in the heat conduction oil heating device, and the heat conduction oil furnace temperature measurement module comprises temperature sensors (not shown) respectively arranged in the low-temperature heat conduction oil furnace 31 and the high-temperature heat conduction oil furnace 32 and is used for transmitting the temperature information of the high-temperature heat conduction oil furnace 32 and the low-temperature heat conduction oil furnace 31 to the DCS control system. The DCS control system further comprises a low-temperature heat transfer oil temperature control module 13 and a high-temperature heat transfer oil temperature control module 14, the low-temperature heat transfer oil temperature control module 13 is respectively connected with the DCS control panel 1 and an electric heating element of the low-temperature heat transfer oil furnace 31, and the DCS control panel 1 can control the heating power of the electric heating element to adjust the temperature of the heat transfer oil in the low-temperature heat transfer oil furnace 31. The high temperature heat conduction oil temperature control module 14 is respectively connected with the electric heating elements of the DCS control panel 1 and the high temperature heat conduction oil furnace 32, and the DCS control panel 1 can control the heating power of the electric heating elements to adjust the temperature of the heat conduction oil in the high temperature heat conduction oil furnace 32. Through the arrangement of the heat conduction oil furnace temperature measurement module, the low-temperature heat conduction oil temperature control module 13 and the high-temperature heat conduction oil temperature control module 14, the DCS control system can control the temperature of each heat conduction furnace at a set temperature according to the feedback information of the heat conduction oil furnace temperature measurement module, and the flow of the heat conduction oil supplied to the heating furnace 2 is convenient to adjust.
Besides, a circulating pump 4 is further arranged in the heat-conducting oil heating device, the circulating pump 4 is respectively connected with the upper part and the lower part of the heating furnace 2 through circulating pipelines, the DCS control panel 1 is connected with the circulating pump 4, and the circulating flow speed of the heat-conducting oil in the heating furnace 2 can be adjusted according to the actual heating condition.
It is worth explaining that the innovation of the heat conduction oil heating device is mainly that the two heat conduction oil furnaces with different set temperatures are used for respectively providing the heat conduction oil which is heated to the set temperature and has better heat transfer efficiency for the heating furnace, the temperature of the heating furnace is increased in a gradient manner, meanwhile, the heating speed can be increased, the processing efficiency is improved, and the automatic control function of the DCS control system is assisted, so that the automatic and rapid heating process can be realized. The heat transfer oil heating device is applicable to any workpiece or mold that needs to be heated in multiple stages. The operation of the heat conducting oil heating device will be described with respect to the sintering and forming process.
According to the temperature range required by sintering and forming, the heat conduction oil can adopt liquid with higher boiling point, such as biphenyl-biphenyl ether (the boiling point is 400 ℃).
The heat transfer oil heating device is used for sintering high polymer materials, and when the heating temperature has three gradients and each gradient temperature needs to be kept for a period of time after reaching, the heat transfer oil heating device is used in the following using process:
firstly, the set temperature of the heat-conducting oil furnace, the sintering gradient temperature value of the heating furnace 2, the heating speed of each gradient temperature value and the heat preservation time after the gradient temperature value is reached are set in the DCS control panel 1.
Secondly, starting heating programs of the high-temperature heat conduction oil furnace 32 and the low-temperature heat conduction oil furnace 31, and respectively heating the high-temperature heat conduction oil furnace 32 and the low-temperature heat conduction oil furnace 31 to set temperatures, wherein the set temperature of the low-temperature heat conduction oil is a first gradient temperature value of the heating furnace in the heating process.
And starting a sintering program, opening a low-temperature heat conduction oil electromagnetic valve 6, pumping low-temperature heat conduction oil to the heating furnace 2 through a delivery pump 5, setting the temperature of the low-temperature heat conduction oil as a first gradient temperature value of the heating furnace in the heating process, and starting a heat preservation program after the heating furnace 2 is filled with the low-temperature heat conduction oil.
When the first gradient heat preservation time is reached, a second gradient temperature rise program is started, the low-temperature heat conduction oil electromagnetic valve 6 is closed, the high-temperature heat conduction oil electromagnetic valve 8 is opened, the low-temperature heat conduction oil return valve 9 is opened, the original heat conduction oil in the heating furnace 2 and newly injected high-temperature heat conduction oil are subjected to sufficient heat exchange in the working process of the circulating pump 4, the DCS control system can control the flow of the conveying pump 5 and adjust the flow of the high-temperature heat conduction oil flowing into the heating furnace 2 according to the feedback of the temperature sensor 12, the temperature in the heating furnace reaches a second gradient temperature value, and the heat preservation program is started. In the process, the heat conduction oil overflowing from the heating furnace 2 can flow back to the low-temperature heat conduction oil furnace 31 through the low-temperature heat conduction oil return valve 9 for reuse, and when the low-temperature heat conduction oil furnace 31 reaches the upper limit of oil injection, the high-temperature heat conduction oil return valve 10 can be opened to enable the heat conduction oil to flow back to the high-temperature heat conduction oil furnace 32.
And after the second gradient heat preservation time is reached, starting a third gradient temperature rising program, adjusting the flow rate of the high-temperature heat conduction oil flowing into the heating furnace 2 by the DCS control system according to the feedback of the temperature sensor 12, and starting the heat preservation program when the temperature in the heating furnace reaches a third gradient temperature value.
And after sintering, opening the heating furnace to lift the mold out, opening the mold after cooling, and taking out the sintered product.
The heat conduction oil heating device is ingenious in design, heat conduction oil can be respectively supplied to the heating furnace through the two heat conduction oil furnaces with different set temperatures, so that a workpiece or a die can be heated in multiple stages, the temperature of the workpiece or the die is increased in a gradient manner, the die is always positioned in the heating furnace in the multiple-stage heating process, the operation steps are fewer, and the processing is more convenient; and the electric heating element and the workpiece or the die are separately arranged, the workpiece or the die is uniformly heated through flowing heat conduction oil, and the heating effect is uniform. Compared with an electric heating air heating furnace in the prior art, the heat conduction oil heating device heats a workpiece or a die by utilizing heat conduction oil which reaches the set temperature and has good heat conduction effect, the heating speed is high, the energy consumption of the device is low, the heating effect is very uniform, and the phenomenon of local over-heating can be prevented.
The specific embodiment 2 of the heat transfer oil heating device of the invention:
the difference with embodiment 1 is that the heat conduction oil furnace is provided with three, which are respectively a high-temperature heat conduction oil furnace, a medium-temperature heat conduction oil furnace and a low-temperature heat conduction oil furnace, and the set temperatures of the three heat conduction oil furnaces are as follows: the high-temperature heat-conducting oil furnace is larger than the medium-temperature heat-conducting oil furnace, and the medium-temperature heat-conducting oil furnace is larger than the low-temperature heat-conducting oil furnace. The three heat conduction oil furnaces respectively supply heat conduction oil to the heating furnace through conveying pipelines, each conveying pipeline comprises three conveying branch pipes, and correspondingly, three pipeline valves are also arranged.
Specific embodiment 3 of the heat transfer oil heating apparatus of the present invention:
the difference with embodiment 1 is that the two pipeline valves are regulating valves, which are respectively a low temperature regulating valve connected in series to the low temperature delivery branch pipe and a high temperature regulating valve connected in series to the high temperature delivery branch pipe, the high temperature regulating valve and the low temperature regulating valve are connected with the DCS control panel through the flow control module, and the DCS control panel can regulate the flow supplied to the heating furnace by the heat-conducting oil furnace through the delivery pump and can also regulate the flow supplied to the heating furnace by the heat-conducting oil furnace through the regulating valves.
In other embodiments, the two pipeline valves are regulating valves, namely a low-temperature regulating valve connected in series to the low-temperature conveying branch pipe and a high-temperature regulating valve connected in series to the high-temperature conveying branch pipe, the high-temperature regulating valve and the low-temperature regulating valve are connected with the DCS control panel through the flow control module, the DCS control panel is not connected with the conveying pump, and the DCS control panel can regulate the flow supplied to the heating furnace by the heat-conducting oil furnace through the regulating valves.
the difference from the embodiment 1 is that the conveying pipeline comprises a low-temperature conveying pipeline and a high-temperature conveying pipeline which are independent of each other, the conveying pump and the pipeline valve are both provided with two valves, the pipeline valve comprises a low-temperature heat-conducting oil electromagnetic valve and a high-temperature heat-conducting oil electromagnetic valve, the low-temperature heat-conducting oil electromagnetic valve and the conveying pump are connected to the high-temperature conveying pipeline in series, and the high-temperature heat-conducting oil electromagnetic valve and the conveying pump are connected to the low-temperature conveying pipeline in series.
different from the embodiment 1, the heat conduction oil heating device is not provided with a heat conduction furnace temperature measurement module, the DCS control system is not provided with a low-temperature heat conduction oil temperature control module and a high-temperature heat conduction oil temperature control module, the DCS control system cannot monitor and adjust the temperature of the two heat conduction oil furnaces, and the DCS control system adjusts the temperature of the heating furnace by adjusting the oil supply flow of each heat conduction oil furnace to the heating furnace and the circulating speed of the circulating pump.
different from the embodiment 1, the heat conducting oil heating device is not provided with a circulating pump, but is provided with an electric stirring device in the heating furnace, so that the heat conducting oil in the heating furnace is fully and uniformly mixed, and the heat exchange is convenient.
Specific embodiment 7 of the heat transfer oil heating apparatus of the present invention:
unlike in example 1, the circulation pump was not connected to the DCS control system, and the flow rate of the circulation pump was constant.
The specific embodiment 8 of the heat transfer oil heating device of the present invention:
unlike embodiment 1, the control system is an FCS control system.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (4)
1. The utility model provides a conduction oil heating device, characterized by includes:
a heating furnace for accommodating and heating a workpiece;
the heat conduction oil furnaces are at least two, each heat conduction oil furnace is used for heating the heat conduction oil in the heat conduction oil furnace to different set temperatures, and each heat conduction oil furnace comprises a low-temperature heat conduction oil furnace and a high-temperature heat conduction oil furnace which are used for respectively providing the heat conduction oil for the heating furnace;
the conveying pipeline is connected with a conveying pump and a pipeline valve in series and used for connecting each heat-conducting oil furnace with the heating furnace and respectively conveying heat-conducting oil to the heating furnace;
the heating furnace temperature measuring module is used for measuring the temperature of the heating furnace;
the control system is connected with the heating furnace temperature measuring module and can adjust the flow of heat conducting oil conveyed to the heating furnace by each heat conducting oil furnace through controlling the conveying pump and/or the pipeline valve according to the temperature information measured by the heating furnace temperature measuring module so as to adjust the temperature of the heating furnace;
the heat-conducting oil heating device comprises a heat-conducting oil furnace temperature measuring module for measuring the temperature of each heat-conducting oil furnace, the heat-conducting oil furnace temperature measuring module is connected with the control system, and the control system can control the heating power of the heat-conducting oil furnace according to the temperature information measured by the heat-conducting oil furnace temperature measuring module so as to adjust the temperature in each heat-conducting oil furnace;
the heat-conducting oil heating device comprises a circulating pump, and the circulating pump is respectively connected with the lower part and the upper part of the heating furnace through circulating pipelines and is used for enabling the heat-conducting oil in the heating furnace to circularly flow;
the conveying pipeline comprises a conveying main pipe and conveying branch pipes, the number of the conveying branch pipes is the same as that of the heat-conducting oil furnace, the conveying branch pipes are connected to the heat-conducting oil furnace in a one-to-one correspondence mode, the other end of each conveying branch pipe is connected with the conveying main pipe, the other end of the conveying main pipe is connected with the heating furnace, the conveying pump is connected to the conveying main pipe in series, and the pipeline valves are connected to the conveying branch pipes in series;
an overflow port is arranged at the upper end of the heating furnace, an overflow pipe is connected between the overflow port and the high-temperature heat conduction oil furnace and between the overflow port and the low-temperature heat conduction oil furnace, the overflow pipe comprises an overflow main pipe, overflow branch pipes connected with the high-temperature heat conduction oil furnace and overflow branch pipes connected with the low-temperature heat conduction oil furnace, one end of the overflow main pipe is connected with the overflow port, the other end of the overflow main pipe is communicated with each overflow branch pipe, and a high-temperature heat conduction oil reflux valve for controlling overflow heat conduction oil to flow to the high-temperature heat conduction oil furnace and a low-temperature heat conduction oil reflux valve for controlling overflow heat conduction oil to flow to the low-temperature heat conduction oil furnace are respectively arranged on the two overflow branch pipes;
the set temperature of the low-temperature heat-conducting oil furnace is a first gradient temperature value of the heating furnace in the heating process;
when the system is used, the control system starts a sintering program, a pipeline valve on a conveying branch pipe connected with the low-temperature heat conduction oil furnace is opened, low-temperature heat conduction oil is pumped to the heating furnace through a conveying pump, and a heat preservation program is started after the heating furnace is filled with the low-temperature heat conduction oil; when the first gradient heat preservation time is reached, starting a second gradient temperature rising program, closing a pipeline valve on a conveying branch pipe connected with the low-temperature heat conduction oil furnace, opening a pipeline valve on the conveying branch pipe connected with the high-temperature heat conduction oil furnace, opening a low-temperature heat conduction oil reflux valve, enabling the original heat conduction oil in the heating furnace to fully exchange heat with the newly injected high-temperature heat conduction oil through the work of a circulating pump, controlling the flow of the conveying pump by a control system according to the feedback of a temperature measurement module of the heat conduction oil furnace, adjusting the flow of the high-temperature heat conduction oil flowing into the heating furnace, enabling the temperature in the heating furnace to reach a second gradient temperature value, starting a heat preservation program, during the process, enabling the heat conduction oil overflowing from the heating furnace to flow back into the low-temperature heat conduction oil furnace through the low-temperature heat conduction oil reflux valve, and when the low-temperature heat conduction oil furnace reaches an upper oil injection limit, opening the high-temperature heat conduction oil reflux valve, and enabling the heat conduction oil to flow back into the high-temperature heat conduction oil furnace.
2. A conduction oil heating apparatus according to claim 1, wherein the transfer header pipe is connected to an upper portion of the heating furnace.
3. A conduction oil heating apparatus according to claim 1 or 2, wherein the circulation pump is connected to the control system so that the control system can adjust the circulation rate of the conduction oil in the heating furnace by controlling the circulation pump.
4. A conduction oil heating apparatus according to claim 1 or 2, wherein an insulating layer is provided outside the heating furnace.
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| CN207214218U (en) * | 2017-08-02 | 2018-04-10 | 优晖科技（北京）有限公司 | Electric heat storage system |
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| KR200473452Y1 (en) * | 2014-04-16 | 2014-07-04 | 양용식 | Electric boiler using heat medium oil |
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