Heat conduction oil boiler waste heat recycling device

Abstract

The utility model discloses a heat conduction oil boiler waste heat recycling device which comprises a boiler body, a heated pipe and a waste heat recycling water tank, a top cover is arranged on the top of the boiler body, the heated pipe is arranged in the boiler body, and the two ends of the heated pipe are communicated with an inlet and an outlet of an external heat conduction oil circulation pipeline respectively. An exhaust pipe vertically extending upwards into the waste heat recovery water tank is arranged on the top cover, an exhaust hole corresponding to the exhaust pipe is formed in the top cover, and the tail end of the oil return pipe transversely penetrates through the waste heat recovery water tank to be connected with the heated pipe. In the boiler body, heat energy is provided through combustion of fossil fuel to heat conduction oil, waste gas is treated and absorbs heat through a flocculating agent aqueous solution in the waste heat recovery water tank, the flocculating agent aqueous solution absorbs heat energy in the waste gas, and then the heat conduction oil in the oil return pipe is heated. And the fossil fuel can be preheated by the heat energy diffused in the waste gas treated by the waste heat recovery water tank, so that the recycling of the heat energy in the waste gas is realized to a greater extent.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal oil boilers, in particular to a waste heat recovery and utilization device for thermal oil boilers. Background Art

[0002] When producing asphalt waterproofing materials, the asphalt raw materials need to be stored statically in storage tanks first. Many storage tanks will be used to form a storage tank area. During production, the asphalt raw materials in the storage tank area are transported to the production line through pipelines, and according to process requirements, there are requirements for the temperature of the asphalt raw materials. Therefore, during static storage, the asphalt raw materials in each storage tank need to be heated to maintain the temperature. Since there are many storage tanks in the storage tank area, the cost of using electric heating for each storage tank separately is too high. In order to save costs, a common way is to equip a thermal oil boiler and use a thermal oil pipeline system for circulating heating.

[0003] A thermal oil boiler is a boiler that uses thermal oil as a heat transfer medium. The thermal oil in the pipeline is heated by the combustion of fossil fuels. The thermal oil transfers the heat to the thermal equipment and then circulates back to the boiler, thereby achieving heat conduction.

[0004] When using a thermal oil boiler, the heat generated by the combustion of fossil fuels cannot be completely absorbed and transferred by the thermal oil. The combustion of fossil fuels will generate a large amount of exhaust gas, which also contains a lot of heat. This part of the heat energy will be lost through the exhaust gas discharge. In order to reduce the loss of heat energy, it is necessary to recycle the heat energy in the exhaust gas. In the prior art, a heat energy recovery device is used to achieve this. However, the device structure is indeed uneven. For example, the invention patent with publication number CN104279753A discloses a flue waste heat recovery type thermal oil boiler, which uses a heat pipe composed of a 4Cr5MoSiV steel shell, a steam chamber, a copper rolled wire mesh wick and a working liquid to absorb the heat energy of the exhaust gas, and then heats the circulating water in the water tank to achieve heat recovery. Due to the special material and process requirements of the heat pipe, and the involvement of another water circulation system, the cost will be relatively high, and its application has certain limitations. In addition, the heat pipe only absorbs the heat of the exhaust gas, and the polluting dust particles, sulfides and nitrogen oxides are not processed, which is not environmentally friendly.

[0005] Taking the actual situation into consideration, the applicant has developed a device that can recover and reuse waste heat from exhaust gas from thermal oil boilers and can post-treat the exhaust gas. It has a simple structure and is safe and environmentally friendly. Utility Model Content

[0006] The main purpose of the utility model is to provide a waste heat recovery device for a thermal oil boiler to solve the problems in the prior art of heat recovery of waste gas from fuel combustion, such as limited device structure, difficulty in promotion and lack of environmental protection.

[0007] In order to solve the above technical problems, the utility model proposes a waste heat recovery and utilization device for a thermal oil boiler, comprising:

[0008] A boiler body, wherein a top cover is provided on the top of the boiler body;

[0009] A heat receiving pipe disposed in the boiler body and having two ends respectively connected to the inlet and outlet of an external heat transfer oil circulation pipeline, wherein the heat transfer oil circulation pipeline includes an oil outlet pipe and an oil return pipe;

[0010] A waste heat recovery water tank containing a flocculant aqueous solution is arranged on the top cover, and an exhaust pipe extending vertically upward into the waste heat recovery water tank is arranged on the top cover. An exhaust hole corresponding to the exhaust pipe is opened on the top cover, and the end of the return oil pipe crosses the waste heat recovery water tank and is connected to the heat receiving pipe.

[0011] Furthermore, the heat receiving tube is sleeved with a plurality of first heat conducting sheets.

[0012] Furthermore, a plurality of second heat conducting plates are sleeved on the oil return pipe in the waste heat recovery water tank.

[0013] Furthermore, a filter screen is detachably provided inside the waste heat recovery water tank, a mounting block is fixedly provided inside the waste heat recovery water tank, a mounting hole matching with the mounting block is provided on the filter screen, a thread is provided on the top of the mounting block, and the filter screen is connected to the waste heat recovery water tank through the thread cooperation between the mounting block and the nut.

[0014] Furthermore, a support frame is fixedly provided on the top cover, the support frame is located above the waste heat recovery water tank, a fuel tank is rotatably provided on the support frame, a feed pipe is provided between the fuel tank and the boiler body, and a feed port is correspondingly provided on the boiler body.

[0015] Furthermore, a rotating column is fixedly provided on the fuel tank, a rotating hole matching with the rotating column is opened on the support frame, and the rotating column and the rotating hole are rotatably connected via a bearing.

[0016] Furthermore, a motor is fixedly provided at the side end of the support frame, the output end of the motor is transmission-connected to the rotating column, a support sheet is also fixedly provided at the side end of the support frame, and a fixing groove cooperating with the support sheet is provided on the fuel tank.

[0017] Furthermore, an insulation board is detachably arranged between the waste heat recovery water tank and the support frame, and a plurality of insulation boards are arranged. Installation grooves are provided on the waste heat recovery water tank and the support frame, and fixing blocks are fixedly arranged at both ends of the insulation board, and the installation grooves and the fixing blocks are matched and connected.

[0018] Furthermore, a collecting box is fixedly provided at the lower end of the boiler body, a storage tray is provided at the lower end of the collecting box, a slide groove cooperating with the storage tray is opened on the collecting box, and sliders cooperating with the slide groove are fixedly provided at both ends of the storage tray.

[0019] Compared with the prior art, the advantages of the utility model are:

[0020] The combustion of fossil fuels in the boiler body provides heat energy to heat the heat transfer oil. The exhaust gas is treated and heat-absorbed by the flocculant aqueous solution in the waste heat recovery water tank. The flocculant aqueous solution absorbs the heat energy in the exhaust gas and then heats the heat transfer oil in the return oil pipe. The heat energy diffused in the exhaust gas is discharged after being treated in the waste heat recovery water tank and the fossil fuel can be preheated, thus realizing the recovery and utilization of heat energy in the exhaust gas to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0023] Figure 2 is a schematic diagram of the matching structure of the filter screen 16 and the waste heat recovery water tank 4,

[0024] Figure 3 It is a schematic diagram of the matching structure of the top cover 3, the waste heat recovery water tank 4 and the support frame 9.

[0025] Figure 4 is a schematic diagram of the structure of the boiler body 1,

[0026] Figure 5 is a schematic diagram of the matching structure of the collection box 7 and the storage tray 27,

[0027] Figure 6 It is a schematic diagram of the structure of the fuel tank 10, and the reference numerals are as follows:

[0028] Boiler body 1, heating tube 2, top cover 3, waste heat recovery water tank 4, exhaust hole 5, exhaust pipe 6, collecting box 7, feed port 8, support frame 9, fuel tank 10, feed pipe 11, first heat conducting plate 12, oil outlet pipe 13, oil return pipe 14, second heat conducting plate 15, filter screen 16, mounting block 17, mounting hole 18, insulation board 19, mounting groove 20, fixing block 21, rotating column 22, rotating hole 23, motor 24, support plate 25, fixing groove 26, storage tray 27, slide groove 28, slider 29. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Please refer to Figures 1 to 6 The utility model provides a waste heat recovery device for a thermal oil boiler, comprising a boiler body 1, a heat receiving pipe 2 and a waste heat recovery water tank 4, wherein:

[0035] The fossil raw materials are burned in the boiler body 1 to provide heat, and a top cover 3 is provided on the top of the boiler body 1. The heat receiving pipe 2 is arranged in the boiler body 1 and the two ends are respectively connected to the inlet and outlet of the external heat transfer oil circulation pipeline. The heat transfer oil circulation pipeline circulates into the boiler body 1. The fossil raw materials in the boiler body 1 are burned to heat the heat receiving pipe 2 to achieve heating of the heat transfer oil. In order to achieve a better heating effect, a plurality of first heat conducting sheets 12 are also provided on the heat receiving pipe 2 to increase the heating area.

[0036] The waste heat recovery water tank 4 is arranged on the top cover 3, and contains a flocculant aqueous solution. The top cover 3 is provided with an exhaust pipe 6 extending vertically upward to the waste heat recovery water tank 4. The top cover 3 is provided with an exhaust hole 5 corresponding to the exhaust pipe 6. The waste gas generated by the combustion of fossil fuels enters the exhaust pipe 6 through the exhaust hole 5 and is discharged into the waste heat recovery water tank 4. After being absorbed and treated by the flocculant aqueous solution, it is discharged. The flocculant aqueous solution absorbs heat energy in the waste gas and treats the dust particles, sulfides and nitrogen oxides therein. Note that the liquid level of the flocculant aqueous solution should always be higher than the top of the exhaust pipe 6. The top of the waste heat recovery water tank 4 should also be provided with an outlet for discharging the treated waste gas.

[0037] In addition, a filter screen 16 is detachably provided inside the waste heat recovery water tank 4, a mounting block 17 is fixedly provided inside the waste heat recovery water tank 4, a mounting hole 18 is provided on the filter screen 16 to cooperate with the mounting block 17, a thread is provided on the top of the mounting block 17, and the filter screen 16 is connected to the waste heat recovery water tank 4 through the thread cooperation of the mounting block 17 and the nut, and the exhaust gas generated by the combustion of the fuel is absorbed by the flocculant aqueous solution to absorb the particles and dust, and the generated sediment is filtered through the filter screen 16, and the larger particles are filtered through the filter screen 16, and the filter screen 16 is detachable and washable. After a period of time, the filter screen 16 needs to be removed for cleaning, and some sediments with very small particle sizes will pass through the filter screen 16 and fall to the bottom of the waste heat recovery water tank 4 for deposition. A supply port is provided at the top of the side of the waste heat recovery water tank 4, and a sewage outlet should also be provided at the bottom, and the sediments with very small particle sizes are discharged through the sewage outlet;

[0038] In the process of continuously treating waste gas, the aqueous solution containing flocculant will also react with the waste gas to generate acidic substances such as sulfuric acid and nitric acid, which will also be continuously consumed. In order to ensure that the aqueous solution containing flocculant in the waste heat recovery water tank 4 can meet the demand, the aqueous solution of flocculant should be replenished and replaced regularly, and the old solution is discharged from the drain outlet and the new solution enters from the supply port.

[0039] The heat transfer oil circulation pipeline includes an oil outlet pipe 13 and an oil return pipe 14. The end of the oil return pipe 14 crosses the waste heat recovery water tank 4 and is connected to the heat receiving pipe 2. Through external heat transfer oil circulation related equipment, the heat transfer oil is circulated between the heat receiving pipe 2 and the heat demanding equipment. The hot heat transfer oil is sent to the heat demanding equipment through the oil outlet pipe 13. After the heat demanding equipment absorbs the heat in the heat transfer oil, the cooled heat transfer oil is circulated back to the heat receiving pipe 2 through the oil return pipe 14 for heating. In this cycle, before the heat transfer oil returns to the heat receiving pipe 2, the temperature is relatively low when passing through the oil return pipe 14, while the temperature is relatively high after the flocculant aqueous solution absorbs the heat energy in the exhaust gas. The heat transfer oil in the oil return pipe 14 will absorb the heat energy in the flocculant aqueous solution and heat the heat transfer oil, thereby realizing the recovery and utilization of the heat energy in the exhaust gas. In order to enhance the heat absorption effect, a plurality of second heat conducting plates 15 are provided on the oil return pipe 14 in the waste heat recovery water tank 4.

[0040] In addition, a support frame 9 is fixedly provided on the top cover 3, and the support frame 9 is located above the waste heat recovery water tank 4. A fuel tank 10 is rotatably provided on the support frame 9, and a feed pipe 11 is provided between the fuel tank 10 and the boiler body 1. A feed port 8 is correspondingly provided on the boiler body 1. The fuel in the fuel tank 10 passes through the feed pipe 11 and enters the boiler body 1 for combustion. Specifically, a rotating column 22 is fixedly provided on the fuel tank 10, and a rotating hole 23 cooperating with the rotating column 22 is opened on the support frame 9. The rotating column 22 and the rotating hole 23 are rotatably connected through a bearing. A motor 24 is fixedly provided on the side end of the support frame 9, and the output end of the motor 24 is transmission-connected to the rotating column 22. A support sheet 25 is also fixedly provided on the side end of the support frame 9, and a fixing groove 26 cooperating with the support sheet 25 is provided on the fuel tank 10.

[0041] The heat generated by the flocculant aqueous solution being heated by the exhaust gas and the residual heat when the exhaust gas is discharged will continue to diffuse into the external environment. The heat discharge path is limited by the insulation plate 19 arranged between the support frame 9 and the waste heat recovery water tank 4. The heat entering the support frame 9 will heat the fuel in the fuel tank 10 arranged on the support frame 9, thereby preheating the fuel. When the combustion of the fuel in the boiler body 1 is about to be completed, the starting motor 24 drives the rotating column 22 to rotate, drives the fuel tank 10 to tilt, and delivers the fossil fuel into the feed pipe 11 and into the boiler body, thereby realizing rapid ignition and combustion of the fuel.

[0042] A collecting box 7 is also fixedly provided at the lower end of the boiler body 1, and a storage tray 27 is provided at the lower end of the collecting box 7. A slide groove 28 cooperating with the storage tray 27 is opened on the collecting box 7, and sliders 29 cooperating with the slide groove 28 are fixedly provided at both ends of the storage tray 27. Ashes generated by the combustion of fossil fuels are collected through the storage tray 27 provided in the collecting box 7.

[0043] An insulation plate 19 is detachably arranged between the waste heat recovery water tank 4 and the support frame 9. There are multiple insulation plates 19. Installation grooves 20 are opened on the waste heat recovery water tank 4 and the support frame 9. Fixed blocks 21 are fixedly arranged at both ends of the insulation plate 19. The installation grooves 20 and the fixed blocks 21 are matched and connected.

[0044] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A waste heat recovery device for a thermal oil boiler, characterized in that: include: A boiler body (1), wherein a top cover (3) is provided on the top of the boiler body (1); A heat receiving pipe (2) disposed in the boiler body (1) and having two ends respectively connected to an inlet and outlet of an external heat transfer oil circulation pipeline, wherein the heat transfer oil circulation pipeline comprises an oil outlet pipe (13) and an oil return pipe (14); A waste heat recovery water tank (4) is arranged on the top cover (3) and contains a flocculant aqueous solution. The top cover (3) is provided with an exhaust pipe (6) extending vertically upward into the waste heat recovery water tank (4). The top cover (3) is provided with an exhaust hole (5) corresponding to the exhaust pipe (6). The end of the return oil pipe (14) crosses the waste heat recovery water tank (4) and is connected to the heat receiving pipe (2).

2. The waste heat recovery device for a thermal oil boiler according to claim 1 is characterized in that: The heat receiving tube (2) is sleeved with a plurality of first heat conducting plates (12).

3. The waste heat recovery device for a thermal oil boiler according to claim 2 is characterized in that: A plurality of second heat conducting plates (15) are sleeved on the oil return pipe (14) in the waste heat recovery water tank (4).

4. The waste heat recovery device for a thermal oil boiler according to claim 3 is characterized in that: A filter screen (16) is detachably and washably arranged inside the waste heat recovery water tank (4), a mounting block (17) is fixedly arranged inside the waste heat recovery water tank (4), a mounting hole (18) is arranged on the filter screen (16) and is matched with the mounting block (17), a thread is arranged on the top of the mounting block (17), and the filter screen (16) is connected to the waste heat recovery water tank (4) through the threaded match between the mounting block (17) and the nut.

5. The waste heat recovery device for a thermal oil boiler according to claim 1 is characterized in that: A support frame (9) is fixedly arranged on the top cover (3), and the support frame (9) is located above the waste heat recovery water tank (4). A fuel tank (10) is rotatably arranged on the support frame (9), and a feed pipe (11) is arranged between the fuel tank (10) and the boiler body (1), and a feed port (8) is correspondingly arranged on the boiler body (1).

6. The waste heat recovery device for a thermal oil boiler according to claim 5 is characterized in that: A rotating column (22) is fixedly arranged on the fuel tank (10), and a rotating hole (23) cooperating with the rotating column (22) is opened on the support frame (9), and the rotating column (22) and the rotating hole (23) are rotatably connected via a bearing.

7. The waste heat recovery device for a thermal oil boiler according to claim 6 is characterized in that: A motor (24) is fixedly arranged at the side end of the support frame (9), and the output end of the motor (24) is transmission-connected to the rotating column (22). A support sheet (25) is also fixedly arranged at the side end of the support frame (9), and a fixing groove (26) matching the support sheet (25) is arranged on the fuel tank (10).

8. The waste heat recovery device for a thermal oil boiler according to claim 5 is characterized in that: A heat preservation plate (19) is detachably arranged between the waste heat recovery water tank (4) and the support frame (9), and a plurality of the heat preservation plates (19) are arranged. The waste heat recovery water tank (4) and the support frame (9) are both provided with mounting grooves (20), and fixing blocks (21) are fixedly arranged at both ends of the heat preservation plate (19), and the mounting grooves (20) and the fixing blocks (21) are matched and connected.

9. The waste heat recovery device for a thermal oil boiler according to claim 1 is characterized in that: A collecting box (7) is fixedly arranged at the lower end of the boiler body (1), a storage tray (27) is arranged at the lower end of the collecting box (7), a slide groove (28) cooperating with the storage tray (27) is opened on the collecting box (7), and sliding blocks (29) cooperating with the slide groove (28) are fixedly arranged at both ends of the storage tray (27).

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