CN112082268A - High-pressure nitrogen electromagnetic circulating heating device - Google Patents
High-pressure nitrogen electromagnetic circulating heating device Download PDFInfo
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- CN112082268A CN112082268A CN202010858163.9A CN202010858163A CN112082268A CN 112082268 A CN112082268 A CN 112082268A CN 202010858163 A CN202010858163 A CN 202010858163A CN 112082268 A CN112082268 A CN 112082268A
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- Prior art keywords
- pressure
- circulating
- pipeline
- temperature nitrogen
- loop
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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
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
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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
- F24H9/0052—Details for air heaters
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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
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1863—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
- F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
- F24H9/2071—Arrangement or mounting of control or safety devices for air heaters using electrical energy supply
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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
- F24H2250/00—Electrical heat generating means
- F24H2250/08—Induction
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a high-pressure nitrogen electromagnetic circulating heating device which comprises a high-pressure Roots blower and circulating pipelines, wherein nitrogen is filled in the circulating pipelines, bypass pipelines are communicated among the circulating pipelines, and a main circulating pipeline is connected with an inner cavity and forms a main circulating loop, a circulating heating loop and an exhaust loop with the bypass pipelines; the high-pressure high-temperature nitrogen conveying process has short path and little heat loss, and the whole electromagnetic circulation heating system has high efficiency, low energy consumption and uniform inner cavity temperature and cannot generate pollution because the high-pressure nitrogen has high heat conduction coefficient and high enthalpy value.
Description
Technical Field
The invention relates to the field of heating equipment, in particular to a high-pressure nitrogen electromagnetic circulating heating device.
Background
Most of the existing pipeline heating adopts a superheated steam or boiler steam heating mode, long-distance conveying is needed, heat loss is caused, and meanwhile, condensed water is generated and can cause pollution after contacting with a medium; on one hand, the superheated steam can cause adverse effects on equipment when being directly used, generally can not be directly used for process production, and needs to be subjected to temperature reduction through a steam distribution station, so that the cost investment is large; the boiler is used for heating by steam, so that the boiler is not environment-friendly and occupies a large area; meanwhile, most of the existing pipeline heating is single-loop heating, and the loops are not integrated and circulated, so that heating energy consumption is wasted, efficiency is low, and heating cost is increased.
Disclosure of Invention
In order to overcome the defects, the invention provides a high-pressure nitrogen electromagnetic circulating heating device.
A high-pressure nitrogen electromagnetic circulating heating device comprises a circulating pipeline and a heating inner cavity; the circulating pipeline is sequentially connected with the heating inner cavity, the main circulating exhaust valve, the high-pressure Roots blower, the sheath heater and the main circulating intake valve to form a main circulating loop; a high-pressure normal-temperature nitrogen inlet is arranged between the main circulation exhaust valve and the high-pressure Roots blower, bypass pipelines are communicated between the high-pressure normal-temperature nitrogen inlet and the main circulation exhaust valve as well as the main circulation intake valve and the sheath heater, bypass control valves are mounted on the bypass pipelines, and a circulation preheating loop is formed by the high-pressure normal-temperature nitrogen inlet, the high-pressure Roots blower, the sheath heater and the bypass control valves which are connected through the pipelines; a low-pressure normal-temperature nitrogen inlet is arranged between the main circulation air inlet valve and the heating inner cavity, a low-pressure normal-temperature nitrogen outlet is arranged between the main circulation exhaust valve and the heating inner cavity, and a drying loop is formed by the low-pressure normal-temperature nitrogen inlet, the heating inner cavity and the low-pressure normal-temperature nitrogen outlet which are connected through pipelines.
According to a preferred embodiment of the present invention, a temperature sensor is disposed on the circulating preheating loop.
According to a preferable scheme of the invention, the low-pressure normal-temperature nitrogen gas exhaust port and the high-pressure normal-temperature nitrogen gas inlet are respectively provided with a pressure display.
According to a preferable scheme of the invention, the input shaft end of the Roots blower is connected with a motor, and the motor is connected with a frequency converter.
The invention has the beneficial effects that: adopt high temperature high pressure nitrogen gas to rush into the heating inner chamber, replace original high pressure steam, have very obvious advantage:
1. the high-temperature nitrogen is heated by adopting the high-efficiency sheath heater arranged in the loop, so that the high-temperature nitrogen has the advantages of high efficiency, low cost, small occupied area and the like, high-pressure steam remote transmission is not needed, and heat loss in the conveying process does not exist;
2. the high-temperature nitrogen adopts a circulating preheating loop, and the nitrogen preheating is partially overlapped with the system working time, so that the system operation efficiency is improved;
3. high-temperature and high-pressure nitrogen is conveyed and pressurized by a high-temperature-resistant Roots high-pressure fan, and energy consumption can be further saved by adopting modes such as frequency conversion or shutdown when a heating process with less heat is needed in the second section of the system operation.
4. After each working cycle is finished, the high-pressure nitrogen can be directly discharged or recycled, and pollution is avoided.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of the present invention:
FIG. 2 is a schematic diagram of an exhaust circuit;
FIG. 3 is a schematic diagram of a cyclic preheating circuit;
FIG. 4 is a schematic diagram of a main loop of the cycle;
wherein: the device comprises a temperature sensor 3, a low-pressure normal-temperature nitrogen inlet 4, a main circulation air inlet valve 5, a sheath heater 6, a circulation pipeline 7, a Roots blower 8, a frequency converter 9, a high-pressure normal-temperature nitrogen inlet 10, a main circulation exhaust valve 11, a low-pressure normal-temperature nitrogen outlet 12, a pressure sensor 13, a heating inner cavity 14, a bypass pipeline 16 and a bypass control valve 17.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, the two components can be communicated with each other, the fixed connection can be welding, gluing and the like, and the specific meaning of the terms in the invention can be understood by those skilled in the art according to specific situations.
Example 1
As shown in fig. 1-4, a high-pressure nitrogen electromagnetic circulation heating device comprises a circulation pipeline 7 and a heating inner cavity 14.
The circulating pipeline 7 is sequentially connected with a heating inner cavity 14, a main circulating exhaust valve 11, a Roots blower 8, a sheath heater 6 and a main circulating intake valve 5 to form a main circulating loop; the main circulation air inlet valve 5 and the main circulation exhaust valve 11 are arranged to control the opening and closing of the circulation pipeline 7, on one hand, the high-pressure normal-temperature nitrogen enters the heating inner cavity 14 after being preheated by opening and closing, and on the other hand, the high-pressure normal-temperature nitrogen enters the preheating loop in the preheating stage by closing.
For the embodiment, the main circulation air inlet valve 5 is opened, the main circulation exhaust valve 11 is opened, the low-pressure normal-temperature nitrogen inlet 4 is closed, the low-pressure normal-temperature nitrogen outlet 12 is closed, high-pressure nitrogen is filled from the high-pressure normal-temperature nitrogen inlet 10, and the high-pressure normal-temperature nitrogen is preheated by the Roots blower 8 and the sheath heater 6 and then filled into the heating cavity 14.
Example 2
The device also comprises a bypass pipeline 16, a high-pressure normal-temperature nitrogen gas inlet 10 is arranged on a circulating pipeline between the main circulating exhaust valve 11 and the Roots blower 8, one end of the bypass pipeline 16 is connected to the circulating pipeline between the high-pressure normal-temperature nitrogen gas inlet 10 and the main circulating exhaust valve 11, the other end of the bypass pipeline is connected to the circulating pipeline between the main circulating intake valve 5 and the sheath heater 6, and a bypass control valve 17 is arranged on the bypass pipeline 16; a circulating preheating loop is formed by a high-pressure normal-temperature nitrogen gas inlet 10, a Roots blower 8, a sheath heater 6 and a bypass control valve 17 which are connected through pipelines; a high-pressure normal-temperature nitrogen gas inlet 10, a Roots blower 8, a sheath heater 6 and a bypass pipeline 16 are arranged, and a main circulation loop and a circulation preheating loop are switched by a bypass control valve 17, a main circulation gas inlet valve 5 and a main circulation gas outlet valve 11.
For the embodiment, the main circulation air inlet valve 5 is closed, the main circulation exhaust valve 11 is closed, the bypass control valve 17 is opened, then the high-pressure normal-temperature nitrogen is filled from the high-pressure normal-temperature nitrogen inlet 10, the high-pressure normal-temperature nitrogen passes through the Roots blower 8 and the sheath heater 6 and is preheated, after the filled high-pressure normal-temperature nitrogen reaches the required temperature, the bypass control valve 17 can be closed, and the main circulation air inlet valve 5 and the main circulation exhaust valve 11 are opened and then enter the circulation main loop; at the moment, when the circulating preheating loop works, the drying loop works simultaneously, the working time of the two loop systems is overlapped, and the working efficiency is improved.
Example 3
A low-pressure normal-temperature nitrogen inlet 4 is arranged on a circulating pipeline 7 between the main circulating air inlet valve 5 and the heating inner cavity 14, a low-pressure normal-temperature nitrogen outlet 12 is arranged on the circulating pipeline 7 between the main circulating exhaust valve 11 and the heating inner cavity 14, and an exhaust loop is formed by the low-pressure normal-temperature nitrogen inlet 4, the heating inner cavity 14 and the low-pressure normal-temperature nitrogen outlet 12 which are connected through pipelines; the low-pressure normal-temperature nitrogen inlet 4 and the low-pressure normal-temperature nitrogen outlet 12 are arranged to form an exhaust loop with a pipeline so as to take away heat generated by the heating inner cavity 14.
For this embodiment, the low-pressure normal-temperature nitrogen inlet 4 is opened, the main-cycle inlet valve 5 is closed, the main-cycle exhaust valve 11 is closed, and the low-pressure normal-temperature nitrogen outlet 12 is opened, so that the heat in the heating cavity 14 can be taken away by the filled low-pressure normal-temperature nitrogen.
And a temperature sensor 3 is arranged on the circulating preheating loop and can be used for monitoring the temperature of nitrogen in the pipeline in real time.
The low-pressure normal-temperature nitrogen gas exhaust port 12 and the high-pressure normal-temperature nitrogen gas inlet 10 are both provided with a pressure sensor 13; the pressure of the nitrogen in the pipeline can be monitored in real time, and the nitrogen is prevented from influencing the uniformity of the temperature inside the heating inner cavity 14 due to unstable pressure.
The input shaft end of the Roots blower 8 is connected with a motor, the motor is connected with the frequency converter 9, and the energy consumption can be further saved by adopting modes of frequency conversion or shutdown and the like when a heating process with less heat is needed in the second half section of the system operation.
The working principle is as follows: in order to introduce high-temperature nitrogen gas into the heating inner cavity, the preheating circulation loop is firstly opened through switching of the bypass valve and the main circulation valve. The preheating circulation loop is composed of a Roots blower and a sheath heater, and is used for preheating the next nitrogen filling in an electromagnetic heating mode. The nitrogen preheat temperature in the loop is controlled by a temperature sensor provided in the preheat circulation loop. The nitrogen temperature of the main loop system is controlled by a temperature sensor provided on the circulation loop. In order to keep the system pressure stable after high-temperature nitrogen in the main loop system is filled into the heating inner cavity, the pressure of the high-pressure nitrogen input into the system is adjusted by installing a pressure regulating valve on a nitrogen inlet, so that the pressure of the high-pressure nitrogen is consistent with the system nitrogen pressure of the main loop. In order to reduce the power required for the nitrogen circulation, the diameter of the piping is selected as large as possible when introducing the piping to the existing equipment, thereby reducing the pressure loss. Especially in the second half of the project which needs less heat, the Roots blower can be stopped.
In light of the foregoing, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. A high-pressure nitrogen electromagnetic circulation heating device comprises a circulation pipeline and a heating inner cavity (14); the method is characterized in that: the circulating pipeline (7) is sequentially connected with a heating inner cavity (14), a main circulating exhaust valve (11), a high-pressure Roots blower (8), a sheath heater (6) and a main circulating intake valve (5) end to form a main circulating loop;
the device is characterized by further comprising a bypass pipeline (16), a high-pressure normal-temperature nitrogen gas inlet (10) is formed in the circulating pipeline between the main circulating exhaust valve (11) and the high-pressure Roots blower (8), one end of the bypass pipeline (16) is connected to the circulating pipeline between the high-pressure normal-temperature nitrogen gas inlet (10) and the main circulating exhaust valve (11), the other end of the bypass pipeline is connected to the circulating pipeline between the main circulating intake valve (5) and the sheath heater (6), and a bypass control valve (17) is mounted on the bypass pipeline (16); a circulating preheating loop is formed by a high-pressure normal-temperature nitrogen gas inlet (10), a high-pressure Roots blower (8), a sheath heater (6) and a bypass control valve (17) which are connected through pipelines;
a low-pressure normal-temperature nitrogen inlet (4) is arranged on a circulating pipeline (7) between the main circulating air inlet valve (5) and the heating inner cavity (14), a low-pressure normal-temperature nitrogen outlet (12) is arranged on the circulating pipeline (7) between the main circulating exhaust valve (11) and the heating inner cavity (14), and a drying loop is formed by the low-pressure normal-temperature nitrogen inlet (4), the heating inner cavity (14) and the low-pressure normal-temperature nitrogen outlet (12) which are connected through pipelines.
2. The high-pressure nitrogen electromagnetic circulation heating device according to claim 1, characterized in that: and a temperature sensor (3) is arranged on the circulating preheating loop.
3. The high-pressure nitrogen electromagnetic circulation heating device according to claim 1, characterized in that: and the low-pressure normal-temperature nitrogen gas exhaust port (12) and the high-pressure normal-temperature nitrogen gas inlet (10) are respectively provided with a pressure sensor (13).
4. The high-pressure nitrogen electromagnetic circulation heating device according to claim 1, characterized in that: the input shaft end of the Roots blower (8) is connected with a motor, and the motor is connected with a frequency converter (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010858163.9A CN112082268A (en) | 2020-08-24 | 2020-08-24 | High-pressure nitrogen electromagnetic circulating heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010858163.9A CN112082268A (en) | 2020-08-24 | 2020-08-24 | High-pressure nitrogen electromagnetic circulating heating device |
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| Publication Number | Publication Date |
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| CN112082268A true CN112082268A (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010858163.9A Pending CN112082268A (en) | 2020-08-24 | 2020-08-24 | High-pressure nitrogen electromagnetic circulating heating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112959569A (en) * | 2021-01-11 | 2021-06-15 | 上海游龙橡胶制品有限公司 | High-pressure nitrogen electromagnetic heating vulcanizing device |
-
2020
- 2020-08-24 CN CN202010858163.9A patent/CN112082268A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112959569A (en) * | 2021-01-11 | 2021-06-15 | 上海游龙橡胶制品有限公司 | High-pressure nitrogen electromagnetic heating vulcanizing device |
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