Efficient displacement heat exchanger

Abstract

The utility model relates to an efficient displacement heat exchanger, and relates to the technical field of heaters, the efficient displacement heat exchanger comprises a displacement heat exchanger body, and the displacement heat exchanger body comprises a coal hot water inlet pipe, a coal hot water outlet pipe, a heated water inlet pipe and a heated water outlet pipe which are communicated with the displacement heat exchanger body; the coal hot water outlet pipe is fixedly connected and communicated with a waste heat recovery pipe, a first heat exchange coil pipe is installed in the waste heat recovery pipe, the heated water inlet pipe is fixedly connected and communicated with a preheating pipe, and a second heat exchange coil pipe is installed in the preheating pipe. The second heat exchange coil pipe and the first heat exchange coil pipe are fixedly connected and communicated through a connecting pipe used for connecting the second heat exchange coil pipe and the first heat exchange coil pipe, and a pump body used for driving a medium in the connecting pipe to circulate is installed on the connecting pipe. The method has the effect of improving the heat utilization rate of coal heat.

Description

Technical Field

[0001] The present application relates to the technical field of heaters, and in particular to a high-efficiency volumetric heat exchanger. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid. It is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used.

[0003] A volumetric heat exchanger is a heat exchanger that uses cold and hot fluids to alternately flow through the surface of the heat storage body (filler) in the heat storage chamber to exchange heat. The cold and hot fluids of a partition volumetric heat exchanger are separated by a solid partition, and heat exchange is carried out through the partition, so it is also called a surface heat exchanger.

[0004] In the related technology, the volumetric heat exchanger usually adopts the inter-wall heat exchange. After the coal heat exchange is completed, the coal heat medium is usually discharged directly through the coal heat outlet pipe. However, this part of the coal heat medium still has a part of usable heat. Direct discharge will cause the waste heat of the coal heat medium to not be fully utilized, affecting the heat utilization rate of the coal heat. Utility Model Content

[0005] In order to improve the thermal utilization rate of coal heat, the present application provides a high-efficiency volumetric heat exchanger.

[0006] The present application provides a high-efficiency volumetric heat exchanger that adopts the following technical solution:

[0007] A high-efficiency volumetric heat exchanger comprises a volumetric heat exchanger body, wherein the volumetric heat exchanger body comprises a coal heat inlet pipe, a coal heat outlet pipe, a heated water inlet pipe and a heated water outlet pipe which are connected to the volumetric heat exchanger body, the coal heat outlet pipe is fixedly connected to and connected with a waste heat recovery pipe, a first heat exchange coil is installed in the waste heat recovery pipe, a preheating pipe is fixedly connected to and connected with the heated water inlet pipe, a second heat exchange coil is installed in the preheating pipe, the second heat exchange coil is fixedly connected to and connected with the first heat exchange coil by a connecting pipe for connecting the two, and a pump body for driving the medium in the connecting pipe to circulate is installed on the connecting pipe.

[0008] By adopting the above technical scheme, after the heat exchange of the coal heat medium is completed, the coal heat medium will be directly discharged into the waste heat recovery pipe through the coal heat outlet pipe, and the waste heat in the coal heat medium will be absorbed by the first heat exchange coil. Subsequently, through the conveying effect of the pump body, the absorbed waste heat in the first heat exchange coil is transmitted to the second heat exchange coil in the preheating pipe, and the cold water before entering the heated water inlet pipe is preheated, thereby more fully recovering the waste heat after the heat exchange of the coal heat medium is completed, thereby improving the heat utilization rate of the coal heat.

[0009] Optionally, a main valve for controlling the water flow rate in the connecting pipe is installed on the connecting pipe.

[0010] By adopting the above technical solution, the opening or closing of the heat circulation between the preheating recovery pipe and the preheating pipe can be controlled by controlling the opening or closing of the main valve.

[0011] Optionally, a water tank is provided on one side of the connecting pipe, the water tank is connected to the connecting pipe, and a branch pipe valve is provided on the connecting pipe for controlling whether the water tank is connected to the connecting pipe.

[0012] By adopting the above technical solution, the coal heat medium with a certain amount of heat recovered from other processes can be added into the water storage tank to heat the coal heat medium in the connecting pipe, thereby improving the preheating effect of the preheating pipe.

[0013] Optionally, a temperature sensor is installed in the water tank.

[0014] By adopting the above technical solution, the water temperature in the water tank can be detected by the temperature sensor, and when the water temperature is too low, the main valve can be closed to cancel the heat extraction of the waste heat medium in the waste heat recovery pipe.

[0015] Optionally, an inspection port is provided on the waste heat recovery pipe, the inspection port is covered with a sealing plate for sealing the inspection port, sealing rings are fixed around the sealing plate, and a fixing component is provided on the sealing plate for fixing the sealing plate at the inspection port.

[0016] By adopting the above technical solution, the first heat exchange coil in the waste heat recovery pipe can be regularly maintained through the inspection port, thereby maintaining the heat exchange efficiency of the first heat exchange coil.

[0017] Optionally, the fixing assembly includes a plurality of fixing bolts, the fixing bolts are threadedly connected to the sealing plate and the fixing bolts are simultaneously threadedly connected to the waste heat recovery pipe.

[0018] By adopting the above technical solution, the fixing bolts can be rotated so that the fixing bolts can fix the sealing plate on the waste heat recovery pipe or cancel the fixing of the sealing plate on the waste heat recovery pipe.

[0019] Optionally, the connecting pipe is configured as a hose with a certain elasticity, a fixed rod and a movable rod are provided in the waste heat recovery pipe, the fixed rod is fixedly connected in the waste heat recovery pipe, the fixed rod and the movable rod are coaxially arranged, and a connecting piece for fixing the two is provided between the fixed rod and the movable rod, and the first heat exchange coil is fixedly connected to the movable rod.

[0020] By adopting the above technical solution, the fixing rod and the movable tube can be unfixed by adjusting the connecting piece, and then the movable rod and the first heat exchange coil can be taken out from the waste heat recovery tube together, thereby facilitating maintenance or replacement of the first heat exchange tube.

[0021] Optionally, the connecting member is configured as a threaded barrel, and the threaded barrel is threadedly connected to the fixed rod and the movable rod at the same time.

[0022] By adopting the above technical solution, the fixing between the movable rod and the fixed rod can be quickly cancelled by rotating the threaded barrel so that the end of the threaded barrel is separated from the movable rod or the fixed rod.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The waste heat absorbed in the first heat exchange coil can be transferred to the second heat exchange coil in the preheating tube, and the waste heat of the cold water before entering the heated water inlet pipe can be recovered. In this way, the waste heat after the heat exchange of the coal heat medium is completed can be recovered more fully, thereby improving the heat utilization rate of the coal heat;

[0025] 2. The coal heat medium with a certain amount of heat recovered from other processes can be added into the water storage tank to increase the temperature of the coal heat medium in the connecting pipe, thereby improving the preheating effect of the preheating pipe;

[0026] 3. The first heat exchange coil in the waste heat recovery pipe can be regularly maintained through the inspection port, thereby maintaining the heat exchange efficiency of the first heat exchange coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0028] Figure 2 is a schematic structural diagram of a first heat exchange coil in an embodiment of the present application;

[0029] Figure 3 It is a schematic diagram of the structure of the second heat exchange coil in an embodiment of the present application.

[0030] In the figure, 1. volumetric heat exchanger body; 11. coal heat inlet pipe; 12. coal heat outlet pipe; 13. heated water inlet pipe; 14. heated water outlet pipe; 2. connecting pipe; 21. main valve; 22. branch valve; 23. pump body; 24. regulating valve; 3. preheating pipe; 4. waste heat recovery pipe; 41. inspection port; 42. sealing plate; 43. sealing ring; 44. fixing assembly; 441. fixing bolt; 5. first heat exchange coil; 6. second heat exchange coil; 7. water storage tank; 71. temperature sensor; 8. fixing rod; 9. movable rod; 10. connecting piece. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1 -Attached Figure 3 , further details of this application are given.

[0032] The embodiment of the present application is: a high-efficiency volumetric heat exchanger, referring to Figure 1 , including a volumetric heat exchanger body 1 erected on the ground, the volumetric heat exchanger body 1 includes a coal heat inlet pipe 11, a coal heat outlet pipe 12, a heated water inlet pipe 13, and a heated water outlet pipe 14 connected to itself.

[0033] Reference Figure 1 and Figure 2 The coal heat outlet pipe 12 is fixedly connected and communicated with a waste heat recovery pipe 4, in which a first heat exchange coil 5 is arranged, and the first heat exchange coil 5 is arranged along the length direction of the waste heat recovery pipe 4. Figure 1 , Figure 2 and Figure 3 Four fixed rods 8 and two movable rods 9 are provided in the waste heat recovery pipe 4. The movable rod 9 is coaxially arranged with the fixed rod 8 and the movable rod 9 is placed between the two fixed rods 8. One end of the fixed rod 8 is fixedly connected to the inner wall of the waste heat recovery pipe 4. The first heat exchange coil 5 is fixedly connected to the outer wall of the movable rod 9. A connecting piece 10 for fixing the fixed rod 8 and the movable rod 9 is provided between the fixed rod 8 and the movable rod 9.

[0034] The connecting member 10 in this embodiment is configured as a threaded barrel, four of which are respectively located at the connection between the fixed rod 8 and the movable rod 9 , the threaded barrel is coaxially arranged with the fixed rod 8 and is threadedly connected to the fixed rod 8 and the movable rod 9 at the same time.

[0035] Reference Figure 1 and Figure 2 The waste heat recovery pipe 4 is provided with an inspection port 41, and the inspection port 41 is covered with a plugging plate 42 for plugging the inspection port 41. At the same time, in order to improve the plugging effect of the plugging plate 42, a sealing ring 43 arranged around the plugging plate 42 is fixedly connected to the edge of the plugging plate 42. The plugging plate 42 is provided with a fixing component 44 for fixing the plugging plate 42 at the inspection port 41.

[0036] The fixing assembly 44 includes four fixing bolts 441 , which are respectively located at the four corners of the sealing plate 42 . The fixing bolts 441 are threadedly connected to the sealing plate 42 , and the rods of the fixing bolts 441 pass through the sealing plate 42 and are threadedly connected to the waste heat recovery pipe 4 .

[0037] When the first heat exchange coil 5 is inspected and repaired, the fixing bolt 441 can be rotated to cancel the fixing of the sealing plate 42 on the waste heat recovery pipe 4, and then the threaded barrel can be rotated to disengage the threaded barrel from the connection between the fixing rod 8 and the movable rod 9, and then the first heat exchange coil 5 can be taken out of the waste heat recovery pipe 4.

[0038] The heated water inlet pipe 13 is fixedly connected and connected with a preheating pipe 3, in which a second heat exchange coil 6 is arranged, and the first heat exchange coil 5 is arranged in the same manner as the first heat exchange coil 5, and the preheating pipe 3 is arranged in the same manner as the waste heat recovery pipe 4. Two connecting pipes 2 are arranged between the second heat exchange coil 6 and the first heat exchange coil 5, and the connecting pipes 2 are arranged as hoses with a certain elasticity. One end of one of the connecting pipes 2 passes through the side wall of the waste heat recovery pipe 4 and is fixedly connected and connected to the water outlet end of the first heat exchange coil 5, and the other end passes through the preheating pipe 3 and is fixedly connected and connected to the water inlet end of the second heat exchange coil 6. One end of the other connecting pipe 2 passes through the side wall of the waste heat recovery pipe 4 and is connected to the water inlet end of the first heat exchange coil 5. A pump body 23 for driving the medium in the connecting pipe 2 to circulate is installed on one of the connecting pipes 2.

[0039] A main valve 21 for controlling the water flow rate in the connecting pipe 2 is installed on the connecting pipe 2 where the pump body 23 is located. A water storage tank 7 is provided on one side of the connecting pipe 2, and the water storage tank 7 is connected to the connecting pipe 2 where the pump body 23 is located. Two branch pipe valves 22 for controlling whether the water storage tank 7 is connected to the connecting pipe 2 and a regulating valve 24 for controlling the flow rate of the coal heat medium in the connecting pipe 2 are installed on the connecting pipe 2. The water storage tank 7 is placed between the two branch pipe valves 22.

[0040] Then, by adding the coal heat medium with a certain amount of heat recovered from other processes into the water storage tank 7, and then opening the branch pipe valve 22, the coal heat medium in the water storage tank 7 can heat up the coal heat medium in the connecting pipe 2. At the same time, in order to facilitate the determination of the stability of the coal heat medium in the water storage tank 7, a temperature sensor 71 is installed in the water storage tank 7.

[0041] The implementation principle of the embodiment of the present application is: after the coal heat medium completes the heat exchange in the volumetric heat exchanger body 1, the coal heat medium will be directly discharged into the waste heat recovery pipe 4 through the coal heat outlet pipe 12, and then the first heat exchange coil 5 will absorb the waste heat in the coal heat medium, and through the conveying effect of the pump body 23, the absorbed waste heat in the first heat exchange coil 5 is transmitted to the second heat exchange coil 6 in the preheating pipe 3, thereby preheating the cold water before entering the heated water inlet pipe 13.

[0042] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-efficiency volumetric heat exchanger, comprising a volumetric heat exchanger body (1), wherein the volumetric heat exchanger body (1) comprises a coal heat water inlet pipe (11), a coal heat water outlet pipe (12), a heated water inlet pipe (13), and a heated water outlet pipe (14) connected to the volumetric heat exchanger body, characterized in that: A waste heat recovery pipe (4) is fixedly connected to and communicated with the coal heat outlet pipe (12), a first heat exchange coil (5) is installed in the waste heat recovery pipe (4), a preheating pipe (3) is fixedly connected to and communicated with the heated water inlet pipe (13), a second heat exchange coil (6) is installed in the preheating pipe (3), a connecting pipe (2) for connecting the second heat exchange coil (6) and the first heat exchange coil (5) is fixedly connected to and communicated with the second heat exchange coil (6) and the first heat exchange coil (5), and a pump body (23) for driving the medium in the connecting pipe (2) to circulate is installed on the connecting pipe (2).

2. A high-efficiency volumetric heat exchanger according to claim 1, characterized in that: The connecting pipe (2) is provided with a main valve (21) for controlling the flow rate of water in the connecting pipe (2).

3. A high-efficiency volumetric heat exchanger according to claim 1, characterized in that: A water storage tank (7) is provided on one side of the connecting pipe (2), the water storage tank (7) is connected to the connecting pipe (2), and a branch pipe valve (22) is provided on the connecting pipe (2) for controlling whether the water storage tank (7) is connected to the connecting pipe (2).

4. A high-efficiency volumetric heat exchanger according to claim 3, characterized in that: A temperature sensor (71) is installed in the water storage tank (7).

5. The high-efficiency volumetric heat exchanger according to claim 1, characterized in that: The waste heat recovery pipe (4) is provided with an inspection port (41), the inspection port (41) is covered with a sealing plate (42) for sealing the inspection port (41), a sealing ring (43) is fixedly connected around the sealing plate (42), and the sealing plate (42) is provided with a fixing component (44) for fixing the sealing plate (42) to the inspection port (41).

6. A high-efficiency volumetric heat exchanger according to claim 5, characterized in that: The fixing assembly (44) comprises a plurality of fixing bolts (441), wherein the fixing bolts (441) are threadedly connected to the blocking plate (42) and the fixing bolts (441) are simultaneously threadedly connected to the waste heat recovery pipe (4).

7. The high-efficiency volumetric heat exchanger according to claim 1, characterized in that: The connecting pipe (2) is configured as a hose with a certain elasticity. A fixed rod (8) and a movable rod (9) are provided in the waste heat recovery pipe (4). The fixed rod (8) is fixedly connected in the waste heat recovery pipe (4). The fixed rod (8) and the movable rod (9) are coaxially arranged. A connecting piece (10) for fixing the fixed rod (8) and the movable rod (9) is provided between the fixed rod (8) and the movable rod (9). The first heat exchange coil (5) is fixedly connected to the movable rod (9).

8. A high-efficiency volumetric heat exchanger according to claim 7, characterized in that: The connecting member (10) is configured as a threaded barrel, and the threaded barrel is simultaneously threadedly connected to the fixed rod (8) and the movable rod (9).

Images