Steam heat source heat conduction oil heating device

Abstract

The invention provides a steam heat source heat conduction oil heating device. The steam heat source heat conduction oil heating device comprises a steam distributing and adjusting system, a heat conduction oil heating system and a condensate water recycling and reusing system. The steam distribution and regulation system is provided with a steam header and a high-temperature temperature and pressure reducer and is used for uniformly distributing the initial superheated steam and regulating the initial superheated steam to proper temperature and pressure; the heat-conducting oil heating system comprises at least two heat-conducting oil heaters, a heat-conducting oil circulating pump and a heat-conducting oil furnace, and heat-conducting oil is driven by the heat-conducting oil circulating pump to be circularly heated in the heaters; the condensate water recycling and reusing system comprises a condensate water tank, a condensate water flash tank and a second temperature and pressure reducer and is used for recycling and reusing steam condensate water after heat exchange. The steam heat energy is efficiently utilized, and the energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to chemical energy equipment, in particular to a device for heating heat transfer oil with a steam heat source. Background Art

[0002] With the continuous development of industrial production, thermal oil has been widely used as a heat carrier in many fields such as printing and dyeing, chemical fiber, petrochemical, and chemical industry. Traditional thermal oil heating devices mostly use coal, heavy oil, light oil, combustible gas, etc. as fuel. These heating methods are not only costly, but also produce a large amount of particulate matter (including primary PM2.5), carbon monoxide, sulfur dioxide, nitrogen oxides and other harmful gases during the combustion process. These pollutants have caused a serious burden on the atmospheric environment and even caused environmental problems such as haze and acid rain, posing a threat to human health, especially the respiratory and cardiovascular systems.

[0003] In order to meet these challenges, a variety of new heating technologies have emerged. Patents CN202835797U and CN102878676B respectively disclose a steam thermal oil heating device and a heating method thereof. These devices use steam as a heat source and exchange heat with steam through a thermal oil pipe, which effectively improves heating efficiency and safety, while significantly reducing environmental pollution.

[0004] In addition, patent CN206274162U proposes a device that uses thermoelectric medium-temperature and medium-pressure steam to supply heat to the polyester thermal oil system. Through heat exchange between superheated steam and thermal oil, it not only meets production needs, but also realizes the recycling of steam, further reducing production costs.

[0005] In order to further improve the accuracy of temperature control and the safety of the system, patent CN112113198A proposes a steam-heated thermal oil furnace device with precise temperature control. The device achieves high-precision temperature control by integrating electric heating and steam heating systems, and adds a variety of protection measures to ensure the safe and stable operation of the system.

[0006] Using steam as a heat source for heating thermal oil has become a trend in current technological development. Through continuous optimization and innovation, a more environmentally friendly, efficient and safe heating solution can be achieved. It is in this context that the present invention proposes a technical solution for heating thermal oil with steam instead of coal, aiming to reduce environmental pollution and improve production efficiency and economic benefits. Summary of the invention

[0007] Aiming at the deficiencies of the prior art, the present invention provides a device for heating thermal oil using a steam heat source.

[0008] In order to achieve the above object, the present invention adopts the following scheme:

[0009] A steam heat source heating thermal oil device comprises a steam distribution and regulation system, a thermal oil heating system and a condensate recovery and reuse system; the steam distribution and regulation system is provided with a steam cylinder and a high-temperature temperature and pressure reducer, which are used to evenly distribute the initial superheated steam and regulate it to a suitable temperature and pressure; the thermal oil heating system comprises at least two thermal oil heaters, a thermal oil circulation pump and a thermal oil furnace, and the thermal oil is driven by the thermal oil circulation pump to circulate and heat in the heater; the condensate recovery and reuse system comprises a condensate tank, a condensate flash tank and a second temperature and pressure reducer, which are used to recover and reuse the steam condensate after heat exchange.

[0010] The high-temperature desuperheater and pressure reducer includes a temperature regulating mechanism and a pressure regulating mechanism, which can accurately reduce the temperature of the initial superheated steam from 500°C to 380°C and the pressure from 5.0MPa to 4.5MPa.

[0011] The thermal oil heater in the thermal oil heating system adopts an exchange surface design to improve the heat transfer efficiency between steam and thermal oil.

[0012] There are at least two thermal oil circulation pumps, which serve as backup for each other.

[0013] The thermal oil boiler serves as a backup heat source and forms a complementary relationship with the thermal oil heater; when the thermal oil heater fails to work normally, the thermal oil boiler can quickly take over the heating task.

[0014] The condensate tank in the condensate recovery and reuse system is equipped with a liquid level monitoring device.

[0015] The condensate flash tank flashes part of the condensate into saturated steam by reducing the pressure. After the temperature and pressure of the saturated steam are further adjusted by the second temperature and pressure reducer, it can be incorporated into the original low-pressure steam system of the plant for use by other process systems.

[0016] The system also includes a temperature and pressure compensation mechanism, which automatically adjusts the heating power or steam flow by monitoring the temperature and pressure changes of the system to compensate for system performance deviations caused by environmental changes and ensure the stability and uniformity of the heat transfer oil temperature.

[0017] The specific components for achieving temperature and pressure compensation include: a temperature sensor, which is used to accurately measure the temperature and pressure of the heat transfer oil, is connected to the controller through an electrical signal line, and transmits data in real time; a controller, which receives data from the temperature sensor, calculates according to a preset algorithm, and sends adjustment instructions to the actuator, which is connected through an electrical signal line; the actuator, including the power regulator of the heater, the steam flow control valve, etc., adjusts the working state according to the controller's instructions, and is connected to the heating equipment through mechanical or electrical signals; a temperature and pressure reducer: used to adjust the temperature and pressure of the steam to ensure the stability of the heating process, and is connected to the steam source and the heater through a pipeline system; the temperature sensor is directly connected to the controller, and transmits the temperature and pressure data of the heat transfer oil in real time; the controller sends control instructions through electrical signals based on the received data.

[0018] The thermal oil temperature series regulation system includes: multi-point temperature sensors, which are arranged at different positions of the thermal oil circulation and connected to the central controller through electrical signal lines to provide comprehensive temperature monitoring; the central controller collects the temperature data of each point, performs comprehensive calculations, and issues regulation instructions to each actuator, which are connected through electrical signal lines; the steam flow regulating valve adjusts the steam flow according to the controller instructions, and is connected to the steam source and the heater through pipelines; the heating power regulator adjusts the heating power of the heater, and is connected to the heater control unit through electrical signals; the circulating pump speed controller controls the running speed of the circulating pump to adjust the flow rate of the thermal oil, and is connected to the central controller through electrical signals. The circulating pump is connected; multi-point temperature sensors are distributed at different positions of the thermal oil circulation, and the temperature data are summarized to the central controller; the central controller comprehensively analyzes the temperature data of each point, and sends adjustment instructions to the steam flow control valve, heating power regulator, circulating pump speed controller and other actuators through electrical signals; the steam flow control valve adjusts the amount of steam entering the heater according to the instructions to control the heating intensity; the heating power regulator directly adjusts the power of the heater to ensure the stability of the thermal oil temperature; the circulating pump speed controller controls the speed of the circulating pump to optimize the flow of thermal oil and heat transfer efficiency; the system accurately adjusts the temperature and pressure of the thermal oil through closed-loop control.

[0019] The present invention has the following advantages:

[0020] Efficient use of steam heat source: Through the steam distribution and regulation system, high-temperature and high-pressure steam is evenly distributed and cooled and reduced to the appropriate temperature and pressure, ensuring efficient use of steam in the thermal oil heating process and avoiding energy waste.

[0021] Condensate recovery and reuse: The condensate recovery and reuse system processes condensate through flash tanks and temperature and pressure reducers, which not only recovers heat energy but also generates low-pressure steam resources that can be used in other process systems, significantly improving the utilization rate of water resources.

[0022] Temperature and pressure compensation and series regulation: Temperature and pressure compensation and series regulation of thermal oil temperature ensure the stability and uniformity of thermal oil temperature through real-time monitoring and feedback regulation. This precise temperature control method improves the reliability and efficiency of the heating process.

[0023] Precise control of regulating valves: Regulating valves are installed on both the steam inlet pipe and the thermal oil inlet pipe. The opening of the regulating valves can be used to accurately control the steam flow and thermal oil flow, meeting the heating requirements under different working conditions.

[0024] Mutual backup design: The mutual backup design of the thermal oil heating system and the thermal oil furnace improves the reliability of the system. When the heater fails to work normally due to a fault, the thermal oil furnace can quickly take over the heating task to ensure a stable supply of thermal oil temperature.

[0025] Flexible equipment switching: Through the design of the thermal oil supply and return pipeline, the working status of the thermal oil heater and the thermal oil furnace can be quickly switched when needed, which improves the flexibility and emergency response capability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 The voltage stabilizing and regulating mechanism of the present invention

[0029] Figure 1 The meanings of the tags in are as follows:

[0030] A: Steam heat source

[0031] B: Thermal oil

[0032] C: Low pressure steam

[0033] D: Condensation

[0034] E: Condensation water

[0035] 1: Steam cylinder

[0036] 2: High temperature desuperheater and pressure reducer

[0037] 3: 1# thermal oil heater

[0038] 4: 1# condensate tank

[0039] 5: 1# thermal oil circulation pump

[0040] 6: 2# thermal oil circulation pump

[0041] 7: 1# thermal oil furnace

[0042] 8: 2# thermal oil furnace

[0043] 9: 2# thermal oil heater

[0044] 10: 2# condensate tank

[0045] 11: Second temperature and pressure reducer

[0046] 12: Condensate flash tank

[0047] 13: Condensate booster pump

[0048] 14: Condensate high pressure pump

[0049] 15. Temperature and pressure compensation

[0050] 16. Series adjustment of thermal oil temperature DETAILED DESCRIPTION

[0051] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0052] The present invention is a device for heating heat transfer oil with a steam heat source. Figure 1 The device comprises the following parts:

[0053] The steam distribution and regulation system includes a steam cylinder (1) and a high-temperature desuperheater (2); wherein the steam heat source (A) provides the initial superheated steam required by the system, and the steam main pipe diameter is DN200, the pressure is 5.0 MPa, and the temperature is 500°C. This high-temperature and high-pressure steam is the power source of the entire system. The steam cylinder (1) serves as the center of steam distribution and evenly distributes the superheated steam from the steam heat source to subsequent equipment. It ensures a stable supply of steam and avoids the impact of pressure fluctuations on the system. The high-temperature desuperheater (2) is installed after the steam cylinder and is used to reduce the temperature and pressure of 5.0 MPa and 500°C superheated steam to 4.5 MPa and 380°C. This step is necessary to ensure that the steam has a suitable temperature and pressure when entering the thermal oil heater, and to protect the subsequent equipment from the direct impact of the high-temperature and high-pressure steam.

[0054] The thermal oil heating system includes a 1# thermal oil heater (3) and a 2# thermal oil heater (9), a 1# thermal oil circulation pump (5) and a 2# thermal oil circulation pump (6), and a 1# thermal oil furnace (7) and a 2# thermal oil furnace (8). The 1# thermal oil heater (3) and the 2# thermal oil heater (9) are the core components of the system and are responsible for heating the thermal oil at about 200°C to a target temperature (such as 230°C). The thermal oil continuously flows through these heaters through the circulation pump to achieve heat absorption and transfer. The 1# thermal oil circulation pump (5) and the 2# thermal oil circulation pump (6) provide power for the thermal oil to ensure that the thermal oil circulates continuously in the system. By setting up two circulation pumps, not only the reliability of the system is improved, but also the function of mutual backup can be realized when necessary, ensuring the continuity and stability of the thermal oil heating process. The 1# thermal oil furnace (7) and the 2# thermal oil furnace (8) serve as backup heat sources and complement the thermal oil heaters. When the heater fails to work properly due to a fault or other reasons, the thermal oil boiler can quickly take over the heating task to ensure a stable supply of thermal oil temperature. This design significantly improves the flexibility and emergency response capabilities of the system.

[0055] The condensate recovery and reuse system includes a 1# condensate tank (4) and a 2# condensate tank (10), a condensate flash tank (12), and a second temperature and pressure reducing device (11). The low-pressure steam (C) and the condensate (D) are cooled by the steam exchanged by the thermal oil heater to form low-pressure steam and condensate. These products still contain a large amount of thermal energy, so they need to be effectively recovered and reused. The 1# condensate tank (4) and the 2# condensate tank (10) respectively collect the condensate from the two thermal oil heaters. The condensate is temporarily stored in the tank for subsequent processing and reuse. The condensate flash tank (12) flashes the condensate to produce saturated steam at 190°C. This step not only recovers the thermal energy in the condensate, but also generates low-pressure steam resources that can be used in other process systems. The second temperature reducing and pressure reducing device (11) further regulates the saturated steam generated by the condensate flash tank, and controls its pressure and temperature within an appropriate range (e.g., 0.5MPa, 160°C to 1.0MPa, 190°C) so that it can be incorporated into the original low-pressure steam system of the plant for use by the process system. Part of the condensate (E) generated in the system is pressurized by the condensate booster pump (13) and transported to the heat source plant for centralized treatment; the other part is pressurized by the condensate high-pressure pump (14) and returned to the high-temperature temperature reducing and pressure reducing device for cooling and water replenishment. This recycling mechanism significantly improves the utilization rate of water resources and reduces the operating cost of the system.

[0056] The system control and optimization method of the present invention comprises: a regulating valve is provided on both the steam inlet pipe and the thermal oil inlet pipe to accurately control the flow of steam and thermal oil entering the thermal oil heater. By adjusting the opening of the regulating valve, the heating process can be finely controlled to ensure the stability and uniformity of the thermal oil temperature.

[0057] The design of the thermal oil supply and return pipeline takes into account the mutual backup function with the existing thermal oil boiler. By installing three-way and cut-off valves in the thermal oil boiler plant, the working state of the thermal oil heater and the thermal oil boiler can be quickly switched when needed, improving the flexibility and reliability of the system.

[0058] See also Figure 2 , Figure 2 The temperature and pressure compensation 15 and the thermal oil temperature series adjustment 16 connected to the thermal oil heaters 3 and 9 are shown; Figure 2 It is mainly composed of flow control valves (FT, FC), A represents the steam heat source, which serves as the energy input of the system; B represents the heat transfer oil, which is the medium for heat transfer. Figure 2 The medium steam heat source provides high-temperature steam as the initial heat source of the system, and transfers the heat to the thermal oil through the heat exchanger. The flow rate and temperature of the steam can be adjusted by the external control system to meet the heating requirements under different working conditions. The thermal oil B circulates in the system, absorbs the heat provided by the steam heat source, and transfers the heat to the equipment or medium that needs to be heated. The circulation of the thermal oil is driven by a pump to ensure that the heat is evenly distributed and continuously transferred.

[0059] Temperature and pressure compensation 15 automatically adjusts the heating power or flow rate by monitoring the temperature and pressure changes of the system to compensate for the system performance deviation caused by environmental changes. In a low temperature and high pressure environment, the heating power is increased to maintain the temperature of the thermal oil; in a high temperature and low pressure environment, the heating power is appropriately reduced to prevent overheating.

[0060] The thermal oil temperature series regulation 16 realizes real-time monitoring and feedback regulation of the thermal oil temperature by connecting multiple temperature sensors and controllers in series. When the temperature is detected to deviate from the set value, the controller will issue a command to adjust parameters such as steam flow, heating power or circulation pump speed to quickly restore the thermal oil temperature to the set range.

[0061] The introduction of the temperature and pressure compensation mechanism has significantly improved the system's ability to adapt to changes in the external environment. Whether it is temperature fluctuations or pressure changes, the system can respond quickly to maintain the stability of the thermal oil temperature, thereby ensuring the continuity and reliability of the heating process.

[0062] By precisely controlling the temperature of the thermal oil and the steam flow, the system can avoid unnecessary energy waste. Under low temperature or low load conditions, the steam supply and heating power are reduced; under high temperature or high load conditions, the corresponding parameters are increased to meet the heating demand. This on-demand adjustment method not only improves energy utilization efficiency, but also reduces operating costs.

[0063] Stable thermal oil temperature and pressure environment helps reduce thermal and mechanical stress inside the equipment, thereby extending the service life of the equipment. At the same time, precise temperature control can also prevent the thermal oil from deteriorating or producing harmful substances due to overheating, further protecting the safety of the system.

[0064] The specific components of temperature and pressure compensation include: Temperature sensor: used to accurately measure the temperature and pressure of the heat transfer oil, connected to the controller through an electrical signal line, and transmit data in real time. Controller: receives data from the temperature sensor, calculates according to the preset algorithm, and sends adjustment instructions to the actuator, connected through an electrical signal line. Actuator: includes the power regulator of the heater, steam flow control valve, etc., adjusts the working state according to the controller's instructions, and is connected to the heating equipment through mechanical or electrical signals. Desuperheater and pressure reducer (if applicable): used to adjust the temperature and pressure of the steam to ensure the stability of the heating process, and is connected to the steam source and heater through a pipeline system.

[0065] The temperature sensor is directly connected to the controller to transmit the temperature and pressure data of the thermal oil in real time. Based on the received data, the controller sends control instructions to the actuator (such as the power regulator of the heater, steam flow control valve, etc.) through electrical signals. If the steam temperature and pressure need to be adjusted, the actuator will further control the desuperheater and pressure reducer to ensure that the steam parameters meet the heating requirements. The adjusted steam enters the thermal oil heater through the pipeline to complete the heating process.

[0066] The specific components of the series regulation of the thermal oil temperature include: Multi-point temperature sensors: arranged at different positions of the thermal oil circulation, connected to the central controller through electrical signal lines, and provide comprehensive temperature monitoring. Central controller: collects temperature data at each point, performs comprehensive calculations, and issues adjustment instructions to each actuator, which are connected through electrical signal lines. Steam flow control valve: adjusts the steam flow according to the controller instructions, and is connected to the steam source and heater through pipelines. Heating power regulator: adjusts the heating power of the heater, and is connected to the heater control unit through electrical signals. Circulation pump speed controller: controls the operating speed of the circulation pump to adjust the flow rate of the thermal oil, and is connected to the circulation pump through electrical signals.

[0067] Multi-point temperature sensors are distributed at different locations of the thermal oil circulation, and the temperature data is summarized to the central controller. The central controller comprehensively analyzes the temperature data of each point and sends adjustment instructions to actuators such as the steam flow control valve, heating power regulator, and circulation pump speed controller through electrical signals. The steam flow control valve adjusts the amount of steam entering the heater according to the instructions to control the heating intensity. The heating power regulator directly adjusts the power of the heater to ensure the stability of the thermal oil temperature. The circulation pump speed controller controls the speed of the circulation pump to optimize the flow of the thermal oil and the heat transfer efficiency. The entire system realizes the precise regulation of the temperature and pressure of the thermal oil through closed-loop control, ensuring the stability and efficiency of the heating process.

[0068] The process of the present invention is as follows:

[0069] Steam source and initial treatment

[0070] The steam source required by the system is DN200, 5.0MPa (500℃) superheated steam, which is the starting point of the entire heat exchange process. The superheated steam first enters the steam distribution cylinder (1), which distributes the steam to ensure that the steam can flow to the subsequent equipment evenly and stably. Subsequently, the steam is regulated in temperature and pressure by the high-temperature desuperheater (2) to 4.5MPa (380℃) superheated steam to meet the needs of the subsequent thermal oil heater. This step ensures that the steam can provide sufficient heat during the heating process and will not damage the equipment due to excessive temperature.

[0071] Thermal oil heating and circulation

[0072] The regulated superheated steam is transported to two thermal oil heaters (3, 9), where steam is used as a heat source to heat the thermal oil at about 200°C to 230°C. The thermal oil heater is designed with an efficient heat exchange surface to ensure efficient heat transfer between steam and thermal oil. The thermal oil from the device is pressurized by the original 1# thermal oil circulation pump (5) and 2# thermal oil circulation pump (6) to form a circulation flow, and the low-temperature thermal oil is continuously transported to the heater for heat exchange. After heat exchange, it is transported back to the device through the pipeline for use by the device. This circulation method ensures that the thermal oil can continuously and stably absorb heat and transfer it to the medium that needs to be heated. Although the thermal oil furnace (7, 8) in the attached figure is not directly involved in this circulation process, the figure mentions that the supply and return pipelines of the thermal oil can be used as a backup with the existing thermal oil furnace through a three-way and a shut-off valve. When necessary, the thermal oil heater can be switched with the thermal oil furnace to improve the flexibility and reliability of the system.

[0073] Steam condensation and recovery

[0074] The steam that has been heat-exchanged by the thermal oil heater has its temperature reduced to about 260°C, forming condensed water. These condensed waters are rich in heat energy and need to be effectively recovered. The condensed water enters the 1# and 2# condensed water tanks (4, 10) for temporary storage. The design of the condensed water tanks takes into account the collection, storage and preliminary treatment of the condensed water, in preparation for subsequent heat recovery. The condensed water further enters the condensed water flash tank (12), during which part of the condensed water flashes into saturated steam at 190°C due to the pressure reduction. This step not only recovers part of the heat energy, but also generates reusable steam resources. The saturated steam generated by the condensed water flash tank is adjusted again by the second temperature and pressure reducer (11), and its steam pressure and temperature can be flexibly adjusted between 0.5MPa160°C and 1.0MPa190°C to meet the needs of different process systems. The regulated steam is incorporated into the original low-pressure steam system of the plant for use by the process system.

[0075] Condensate pressurization and reflux

[0076] After heat exchange in the process system, part of the condensed water is pressurized by the condensed water booster pump (13) and transported to the heat source plant for further processing or reuse; the other part is pressurized by the condensed water high-pressure pump (14) and returned to the high-temperature desuperheater (2) for cooling and water replenishment. This step ensures the continuity and stability of the water circulation within the system, and also improves the utilization efficiency of water resources.

[0077] The equipment layout and efficient heat exchange process of the present invention realize the full utilization of steam thermal energy and the effective recovery of condensed water. The various devices in the system cooperate with each other to complete the complete cycle from steam heat source to thermal oil heating, and then to condensed water recovery and reuse. Through the control of control elements such as regulating valves and temperature and pressure reducers, the system can respond to changes in demand under different working conditions and ensure the stable and efficient operation of the entire heat exchange process. In addition, the system also has high reliability and flexibility, and can improve the overall performance and operating efficiency of the system through mutual backup and flexible switching between devices.

[0078] In the present invention, through the distributed monitoring of multi-point temperature sensors, the temperature data of each key point in the heat transfer oil circulation system can be obtained in real time, and combined with the comprehensive analysis of the central controller, the precise control of the heat transfer oil temperature can be achieved. According to actual application cases, this control method can control the temperature fluctuation range within ±1°C, significantly improving the temperature control accuracy of the heating process.

[0079] The application of temperature and pressure compensation technology effectively eliminates the impact of temperature and pressure changes on steam flow and thermal oil temperature, allowing the heating system to maintain a stable operating state under various working conditions. This reduces system instability and failure rate caused by temperature fluctuations and improves the reliability and continuity of the production line.

[0080] Through the precise adjustment of the steam flow control valve, the amount of steam entering the heater can be ensured to be just right, which not only meets the heating demand but also avoids energy waste. At the same time, the heating power regulator dynamically adjusts the heating power according to the real-time monitored temperature data, further improving the heating efficiency. It is estimated that this control method can increase the heating efficiency by about 10%-15%.

[0081] In the present invention, the temperature and pressure compensation mechanism enables the system to quickly respond to changes in ambient temperature and pressure and maintain the temperature of the thermal oil stable. Assuming that under extreme environmental conditions (such as temperature fluctuations of ±10°C and pressure changes of ±20%), the system can adjust to a stable state within 5 minutes, which is at least 30% more stable than a system without compensation.

[0082] Improved energy efficiency: Under low temperature or low load conditions, assuming that the steam supply and heating power can be reduced by 20%, the overall energy consumption can be reduced by about 15%.

[0083] Assuming that the annual operating time is 8,000 hours, 10% of energy costs can be saved through optimized control, that is, the annual savings are about 5% of the total operating costs (the specific cost needs to be calculated based on energy prices).

[0084] The stable temperature and pressure environment of the thermal oil reduces the internal stress of the equipment; therefore, the average service life of the equipment can be extended by 20%, for example from the original 10 years to 12 years.

[0085] Precise temperature control prevents the heat transfer oil from overheating and deteriorating; through control, the heat transfer oil overheating incidents can be reduced by 90%, significantly reducing the risk of safety accidents caused by overheating.

[0086] The closed-loop control system achieves precise regulation of the temperature and pressure of the thermal oil. Through optimized control, the heating efficiency is increased by 15%, while the temperature fluctuation range is controlled within ±1°C, which is 50% more stable than the traditional system.

[0087] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A steam heat source heating thermal oil device, characterized in that: It includes a steam distribution and regulation system, a thermal oil heating system, and a condensate recovery and reuse system; the steam distribution and regulation system is provided with a steam cylinder and a high-temperature temperature and pressure reducer, which are used to evenly distribute the initial superheated steam and adjust it to a suitable temperature and pressure; the thermal oil heating system includes at least two thermal oil heaters, a thermal oil circulation pump and a thermal oil furnace, and the thermal oil is driven by the thermal oil circulation pump to circulate and heat in the heater; the condensate recovery and reuse system includes a condensate tank, a condensate flash tank and a second temperature and pressure reducer, which are used to recover and reuse the steam condensate after heat exchange.

2. The steam heat source heating thermal oil device according to claim 1, characterized in that: The high-temperature desuperheater and pressure reducer includes a temperature regulating mechanism and a pressure regulating mechanism, which reduces the temperature of the initial superheated steam from 500°C to 380°C and the pressure from 5.0MPa to 4.5MPa.

3. The steam heat source heating thermal oil device according to claim 1, characterized in that: The thermal oil heater in the thermal oil heating system adopts an exchange surface design to improve the heat transfer efficiency between steam and thermal oil.

4. The steam heat source heating thermal oil device according to claim 1, characterized in that: There are at least two thermal oil circulation pumps, which serve as backup for each other.

5. The steam heat source heating thermal oil device according to claim 1, characterized in that: The thermal oil boiler serves as a backup heat source and forms a complementary relationship with the thermal oil heater; when the thermal oil heater fails to work normally, the thermal oil boiler can quickly take over the heating task.

6. The steam heat source heating thermal oil device according to claim 1, characterized in that: The condensate tank in the condensate recovery and reuse system is equipped with a liquid level monitoring device.

7. The steam heat source heating thermal oil device according to claim 1, characterized in that: The condensate flash tank flashes part of the condensate into saturated steam by reducing the pressure. After the temperature and pressure of the saturated steam are further adjusted by the second temperature and pressure reducer, it can be incorporated into the original low-pressure steam system of the plant for use by other process systems.

8. The steam heat source heating thermal oil device according to claim 1, characterized in that: The system also includes a temperature and pressure compensation mechanism, which automatically adjusts the heating power or steam flow by monitoring the temperature and pressure changes of the system to compensate for system performance deviations caused by environmental changes and ensure the stability and uniformity of the heat transfer oil temperature.

9. The steam heat source heating thermal oil device according to claim 9, characterized in that: The specific components for achieving temperature and pressure compensation include: a temperature sensor, which is used to accurately measure the temperature and pressure of the heat transfer oil, is connected to the controller through an electrical signal line, and transmits data in real time; a controller, which receives data from the temperature sensor, calculates according to a preset algorithm, and sends adjustment instructions to the actuator, which is connected through an electrical signal line; the actuator, including the power regulator of the heater, the steam flow control valve, etc., adjusts the working state according to the controller's instructions, and is connected to the heating equipment through mechanical or electrical signals; a temperature and pressure reducer: used to adjust the temperature and pressure of the steam to ensure the stability of the heating process, and is connected to the steam source and the heater through a pipeline system; the temperature sensor is directly connected to the controller, and transmits the temperature and pressure data of the heat transfer oil in real time; the controller sends control instructions through electrical signals based on the received data.

10. The device for heating thermal oil using a steam heat source according to claim 1, characterized in that: The thermal oil temperature series regulation system includes: multi-point temperature sensors, which are arranged at different positions of the thermal oil circulation and connected to the central controller through electrical signal lines to provide comprehensive temperature monitoring; the central controller collects the temperature data of each point, performs comprehensive calculations, and issues regulation instructions to each actuator, which are connected through electrical signal lines; the steam flow regulating valve adjusts the steam flow according to the controller instructions, and is connected to the steam source and the heater through pipelines; the heating power regulator adjusts the heating power of the heater, and is connected to the heater control unit through electrical signals; the circulating pump speed controller controls the running speed of the circulating pump to adjust the flow rate of the thermal oil, and is connected to the central controller through electrical signals. The circulating pump is connected; multi-point temperature sensors are distributed at different positions of the thermal oil circulation, and the temperature data are summarized to the central controller; the central controller comprehensively analyzes the temperature data of each point, and sends adjustment instructions to the steam flow control valve, heating power regulator, circulating pump speed controller and other actuators through electrical signals; the steam flow control valve adjusts the amount of steam entering the heater according to the instructions to control the heating intensity; the heating power regulator directly adjusts the power of the heater to ensure the stability of the thermal oil temperature; the circulating pump speed controller controls the speed of the circulating pump to optimize the flow of thermal oil and heat transfer efficiency; the system accurately adjusts the temperature and pressure of the thermal oil through closed-loop control.

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