Waste heat recovery device for gas-fired heating tank

Abstract

The utility model is suitable for bitumen production equipment technical field discloses a kind of waste heat recovery devices of gas type heating tank, including gas type heating tank, heating coil in gas type heating tank, heat exchanger being communicated with heating coil, heat conduction oil coil being located in heat exchanger, heat conduction oil storage tank being connected with the oil inlet end of heat conduction oil coil, heat conduction oil delivery pipe being connected with the oil outlet end of heat conduction oil coil, electromagnetic heating assembly being sleeved on heat conduction oil delivery pipe, and heat equipment being connected with heat conduction oil delivery pipe.The utility model is by being sleeved electromagnetic heating assembly on heat conduction oil delivery pipe being connected with heat conduction oil coil in heat exchanger, so that heat conduction oil can be further heated in the process of conveying in heat conduction oil delivery pipe according to the use requirement of heat equipment, or not through electromagnetic heating assembly heating, and directly used for heat equipment, so heat conduction oil's heating range is wider, can satisfy the various heat demand of bitumen production enterprise.

Description

Technical Field

[0001] This utility model relates to the technical field of asphalt production equipment, and in particular to a waste heat recovery device for a gas-fired heating tank. Background Technology

[0002] Gas-fired heating tanks are tanks that use natural gas or liquefied petroleum gas as fuel and generate heat through a burner. They have advantages such as complete combustion, cleanliness and environmental friendliness, fast heating speed, and convenient temperature control, and can be used in the production of modified asphalt.

[0003] Existing gas-fired heating tanks used for modified asphalt production typically include heating coils through which high-temperature gas is introduced. However, even after heat exchange with the heated material (e.g., base asphalt), the high-temperature gas still retains a significant amount of heat. To recover and utilize the waste heat from these high-temperature gases, Chinese patent document CN218583824U discloses a waste heat recovery device for asphalt heating tanks. This device utilizes a heat exchanger positioned above the asphalt heating tank. When the tank is operating, the high-temperature gas discharged from the heating coils enters the heat exchanger and exchanges heat with the heat transfer oil in the heat transfer oil coil within the exchanger, thus raising the temperature of the oil and recovering the waste heat from the high-temperature gas.

[0004] However, after the heat transfer oil exchanges heat with the high-temperature gas discharged from the heating coil, the temperature rise of the heat transfer oil is limited. Asphalt production enterprises have many heat usage scenarios (for example, the base asphalt also needs to be heated when premixing base asphalt with SBS modifier), and the existing waste heat recovery devices of asphalt heating tanks cannot meet the diverse heat usage needs of asphalt production enterprises.

[0005] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0006] The present invention provides a waste heat recovery device for a gas-fired heating tank, which aims to solve the problem that existing waste heat recovery devices for asphalt heating tanks cannot meet the diverse heat needs of asphalt production enterprises.

[0007] To achieve the above objectives, the solution provided by this utility model is as follows:

[0008] This utility model provides a waste heat recovery device for a gas-fired heating tank, including a gas-fired heating tank, a heating coil disposed within the gas-fired heating tank, a heat exchanger connected to the heating coil, and a heat transfer oil coil disposed within the heat exchanger; further comprising:

[0009] A heat transfer oil storage tank, wherein the heat transfer oil storage tank is connected to the oil inlet end of the heat transfer oil coil;

[0010] A heat transfer oil delivery pipe is connected to the oil outlet end of a heat transfer oil coil.

[0011] An electromagnetic heating assembly, wherein the electromagnetic heating assembly is sleeved on a heat transfer oil conveying pipe;

[0012] The heat-using equipment is connected to the heat transfer oil conveying pipe.

[0013] Optionally, the heat transfer oil conveying pipe includes multiple heat transfer oil pipe sections connected in series; each heat transfer oil pipe section is connected to a heat-using device, and each heat transfer oil pipe section is fitted with an electromagnetic heating component.

[0014] Optionally, a first valve body is provided on the heat-conducting oil pipe upstream of the electromagnetic heating assembly.

[0015] Optionally, a temperature sensor is provided on the heat-conducting oil pipe downstream of the electromagnetic heating assembly.

[0016] Optionally, the waste heat recovery device for the gas-fired heating tank further includes:

[0017] An oil inlet pipe is connected to both the oil inlet end of the heat transfer oil storage tank and the heat transfer oil coil.

[0018] The first thermal oil pump has its input and output ends connected to the oil inlet pipe.

[0019] Optionally, the waste heat recovery device for the gas-fired heating tank further includes:

[0020] The return oil pipe is connected to the heat-using equipment and the heat transfer oil storage tank.

[0021] The second valve body is located on the return oil pipe;

[0022] The second thermal oil pump has its input and output ends connected to the return oil pipe.

[0023] Optionally, the heat transfer oil storage tank includes multiple interconnected tanks.

[0024] Optionally, the electromagnetic heating assembly includes:

[0025] A heat insulation layer is sleeved on the heat-conducting oil pipe section;

[0026] A heating coil, wherein the heating coil is wound on a heat insulation layer;

[0027] A high-frequency power supply, which is electrically connected to the heating coil.

[0028] Optionally, the heat-using equipment includes at least one of a base asphalt storage tank, an asphalt premix tank, and an asphalt development tank.

[0029] Optionally, a weighbridge is installed inside the chamber, and the weighbridge is located below the material feeding assembly.

[0030] Beneficial effects:

[0031] This utility model provides a waste heat recovery device for a gas-fired heating tank. By installing an electromagnetic heating component on the heat transfer oil delivery pipe connected to the heat transfer oil coil in the heat exchanger, the heat transfer oil can be further heated according to the usage requirements of the heat-using equipment during the transportation process in the heat transfer oil delivery pipe. Therefore, the temperature rise range of the heat transfer oil is relatively wide, which can meet the various heat needs of asphalt production enterprises. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 This is a simplified structural diagram of the waste heat recovery device for the gas-fired heating tank provided by this utility model.

[0034] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0035] Figure 3 This is a simplified structural diagram of the electromagnetic heating assembly.

[0036] Figure 4 yes Figure 3 Enlarged view of section B.

[0037] Explanation of icon numbers:

[0038] 1-Gas-fired heating tank; 2-Heating coil; 3-Heat exchanger; 4-Heat transfer oil coil; 5-Heat transfer oil storage tank; 6-Heat transfer oil pipe section; 7-Electromagnetic heating assembly; 71-Insulation layer; 72-Heating coil; 73-High frequency power supply; 8-Heat-using equipment; 9-First valve body; 10-Temperature collector; 11-Oil inlet pipe; 12-First heat transfer oil pump; 13-Oil return pipe; 14-Second valve body; 15-Second heat transfer oil pump; 16-Exhaust pipe. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0041] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0042] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0043] Please see Figures 1 to 4 This utility model provides a waste heat recovery device for a gas-fired heating tank 1, including a gas-fired heating tank 1, a heating coil 2, a heat exchanger 3, a heat transfer oil coil 4, a heat transfer oil storage tank 5, a heat transfer oil conveying pipe, an electromagnetic heating component 7, and a heat-using device 8.

[0044] The heating coil 2 is located inside the gas-fired heating tank 1. It can be installed within the jacket of the gas-fired heating tank 1 or directly inside the gas-fired heating tank 1 near the inner wall of the tank. Furthermore, the heating coil 2 is connected to a burner to allow high-temperature gas to be introduced into the heating coil 2 for heating the base asphalt. The heat exchanger 3 is located at the top of the gas-fired heating tank 1, and its bottom is connected to the gas outlet of the heating coil 2. The heat transfer oil coil 4 is located inside the heat exchanger 3. When the gas-fired heating tank 1 is operating, the high-temperature gas discharged from the heating coil 2 enters the heat exchanger 3. When heat transfer oil is introduced into the heat transfer oil coil 4, heat exchange occurs between the gas and the heat transfer oil, causing the heat transfer oil to heat up.

[0045] The heat transfer oil storage tank 5 is used to store the heat transfer oil required for production operations, and the heat transfer oil storage tank 5 is connected to the oil inlet end of the heat transfer oil coil 4, so that the heat transfer oil in the heat transfer oil storage tank 5 can be transported to the heat transfer oil coil 4; while the heat transfer oil delivery pipe is connected to the oil outlet end of the heat transfer oil coil 4, and the heat-using equipment 8 is connected to the heat transfer oil delivery pipe, so that the heat transfer oil after heat exchange and heating can be sent out of the heat exchanger 3 and provide heat to the heat-using equipment 8.

[0046] The electromagnetic heating component 7 is mounted on the heat transfer oil conveying pipe. The electromagnetic heating component 7 heats the heat transfer oil conveying pipe, allowing the heat transfer oil to be further heated according to the usage requirements of the heat-using equipment 8 during its transport within the pipe, or it can be used directly in the heat-using equipment 8 without being heated by the electromagnetic heating component 7. Therefore, the heat transfer oil has a wide temperature range, which can meet the diverse heat needs of asphalt production enterprises.

[0047] Optionally, the heat transfer oil conveying pipe includes multiple heat transfer oil pipe sections 6 connected in series; each heat transfer oil pipe section 6 is connected to a heat-using device 8, and the heat-using device 8 may include at least one of a base asphalt storage tank, an asphalt premixing tank, and an asphalt development tank, thereby providing heat to the heat-using device 8 at different process stages of modified asphalt production. Each heat transfer oil pipe section 6 is fitted with an electromagnetic heating component 7, and the working power of the electromagnetic heating component 7 can be adjusted. Therefore, the temperature of the heat transfer oil in the heat transfer oil pipe section 6 can be adjusted according to the usage requirements of the heat-using device 8, thereby meeting the various heat-using needs of asphalt production enterprises at different process stages.

[0048] Optionally, a first valve body 9 is provided on the heat transfer oil pipe section 6 upstream of the electromagnetic heating assembly 7. The first valve body 9 can be a manual valve body or an electric ball valve. The first valve body 9 can control whether to supply heat transfer oil to the heat-using equipment 8 connected to the heat transfer oil pipe section 6. When there is a situation where the heat-using equipment 8 does not need to work, it can prevent heat transfer oil from being delivered to the unactivated heat-using equipment 8.

[0049] Optionally, a temperature sensor 10 is provided on the heat transfer oil pipe section 6 downstream of the electromagnetic heating assembly 7. The temperature sensor 10 can be used to collect the temperature of the heat transfer oil after it has been heated by the electromagnetic heating assembly 7 (which has a high-frequency power supply 73). When the temperature data of the heat transfer oil collected by the temperature sensor 10 is lower than the usage requirements of the heat-using equipment 8, the electromagnetic heating assembly 7 can increase its working power based on the temperature data collected by the temperature sensor 10, so that the temperature of the heat transfer oil subsequently delivered to the heat-using equipment 8 is further increased.

[0050] When the temperature data of the heat transfer oil collected by the temperature collector 10 is higher than the usage requirements of the heat-using equipment 8, the electromagnetic heating component 7 can dynamically adjust its working power based on the temperature data collected by the temperature collector 10, so that the temperature of the heat transfer oil subsequently delivered to the heat-using equipment 8 will not be too high.

[0051] Optionally, the waste heat recovery device of the gas-fired heating tank 1 further includes an oil inlet pipe 11 and a first thermal oil pump 12. The oil inlet pipe 11 is connected to both the oil outlet of the thermal oil storage tank 5 and the oil inlet of the thermal oil coil 4, while the input and output ends of the first thermal oil pump 12 are connected to the oil inlet pipe 11. This allows the thermal oil in the thermal oil storage tank 5 to be transported to the thermal oil coil 4 in the heat exchanger 3, and allows the thermal oil in the thermal oil coil 4 to be discharged outside the heat exchanger 3.

[0052] Optionally, the waste heat recovery device of the gas-fired heating tank 1 further includes an oil return pipe 13, a second valve body 14, and a second heat transfer oil pump 15.

[0053] The return oil pipe 13 is connected to the heat-using equipment 8 and the heat transfer oil storage tank 5; the second valve body 14 is installed on the return oil pipe 13; the input and output ends of the second heat transfer oil pump 15 are connected to the return oil pipe 13 to provide power for the heat transfer oil to flow back from the heat-using equipment 8 to the heat transfer oil storage tank 5.

[0054] Optionally, the heat transfer oil storage tank 5 includes multiple interconnected tanks, which can increase the storage capacity of heat transfer oil and better meet the diverse heat needs of asphalt production enterprises.

[0055] Optionally, the electromagnetic heating assembly 7 includes a heat insulation layer 71, a heating coil 72, and a high-frequency power supply (high-frequency heater) 73. The heat insulation layer 71 is sleeved on the heat-conducting oil pipe section 6, and may be an aluminum silicate heat insulation layer 71, which can reduce heat exchange between the heat-conducting oil pipe section 6 and the outside environment. The heating coil 72 is wound on the heat insulation layer 71; the high-frequency power supply 73 is electrically connected to the heating coil 72.

[0056] This invention supplies power to the heating coil 72 via a high-frequency power supply 73, enabling the heating coil 72 to generate high-frequency magnetic lines of force that act on the heat-conducting oil pipe section 6. As a result, the heat-conducting oil pipe section 6 and the heat-conducting oil flowing through it can be heated rapidly, thereby flexibly meeting the heat usage needs of different heat-using equipment 8.

[0057] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A waste heat recovery device for a gas-fired heating tank, comprising a gas-fired heating tank (1), a heating coil (2) disposed within the gas-fired heating tank (1), a heat exchanger (3) connected to the heating coil (2), and a heat transfer oil coil (4) disposed within the heat exchanger (3); characterized in that, Also includes: A heat transfer oil storage tank (5) is connected to the oil inlet end of a heat transfer oil coil (4); A heat transfer oil conveying pipe is connected to the oil outlet end of the heat transfer oil coil (4); Electromagnetic heating assembly (7), wherein the electromagnetic heating assembly (7) is sleeved on the heat transfer oil conveying pipe; The heat-using device (8) is connected to the heat transfer oil conveying pipe.

2. The waste heat recovery device for the gas-fired heating tank according to claim 1, characterized in that, The heat transfer oil conveying pipe includes multiple heat transfer oil pipe sections (6) connected in series; each heat transfer oil pipe section (6) is connected to a heat-using device (8), and each heat transfer oil pipe section (6) is fitted with an electromagnetic heating component (7).

3. The waste heat recovery device for the gas-fired heating tank according to claim 2, characterized in that, The heat-conducting oil pipe section (6) is provided with a first valve body (9) upstream of the electromagnetic heating assembly (7).

4. The waste heat recovery device for the gas-fired heating tank according to claim 2, characterized in that, A temperature sensor (10) is provided on the heat-conducting oil pipe section (6) downstream of the electromagnetic heating assembly (7).

5. The waste heat recovery device for a gas-fired heating tank according to claim 1 or 2, characterized in that, Also includes: Oil inlet pipe (11), which is connected to the oil inlet end of both the heat transfer oil storage tank (5) and the heat transfer oil coil (4); The first thermal oil pump (12) has its input and output ends connected to the oil inlet pipe (11).

6. The waste heat recovery device for a gas-fired heating tank according to claim 1 or 2, characterized in that, Also includes: The return oil pipe (13) is connected to the heat-using equipment (8) and the heat transfer oil storage tank (5); The second valve body (14) is located on the return oil pipe (13); The second thermal oil pump (15) has its input and output ends connected to the return oil pipe (13).

7. The waste heat recovery device for a gas-fired heating tank according to claim 1, characterized in that, The heat transfer oil storage tank (5) includes multiple interconnected tanks.

8. The waste heat recovery device for the gas-fired heating tank according to claim 2, characterized in that, The electromagnetic heating assembly (7) includes: A heat insulation layer (71) is sleeved on the heat-conducting oil pipe section (6); Heating coil (72), the heating coil (72) is wound on the heat insulation layer (71); A high-frequency power supply (73) is electrically connected to a heating coil (72).

9. The waste heat recovery device for the gas-fired heating tank according to claim 1, characterized in that, The heat-using equipment (8) includes at least one of a base asphalt storage tank, an asphalt premix tank, and an asphalt development tank.

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