Waste heat recoverer

Abstract

The utility model relates to the technical field of heat exchangers, and discloses a waste heat recoverer, which is characterized in that the bottom of a shell pass cylinder is provided with a feed water inlet and a liquid outlet, and the top of the shell pass cylinder is provided with a steam outlet; a heat exchange tube is installed in the shell pass cylinder, a tube opening of the heat exchange tube is connected with the tube pass cylinder, a gas inlet is formed in the top of the tube pass cylinder, a gas outlet is formed in the bottom of the tube pass cylinder, and a start-up steam inlet is further formed in the bottom of the shell pass cylinder; a liquid discharge pipe is fixed above the heat exchange pipe in the tube pass cylinder and comprises a plurality of sections of liquid discharge connecting pipes which are connected through flanges, each liquid discharge connecting pipe is connected with a liquid level pipe, a liquid level liquid inlet is formed in the top of each liquid level pipe, a V-shaped water inlet gap is formed in the edge of each liquid level liquid inlet, and pipe opening flanges of the liquid discharge connecting pipes at the two ends are connected with flange blind plates; a tee joint is arranged on the liquid drainage connecting pipe located in the middle and connected with a liquid drainage header pipe, and a header pipe blind plate is further installed after the liquid drainage header pipe penetrates out of the shell pass barrel. The device solves the problems that liquid in a shell pass cylinder cannot be adjusted, and the interior of equipment cannot be maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to the field of heat recovery devices, specifically to a waste heat recovery device. Background Art

[0002] A heat exchanger is an energy-saving device that transfers heat between two or more fluids at different temperatures. It is one of the main devices that transfers heat from a higher temperature fluid to a lower temperature fluid so that the fluid temperature reaches the specified index of the process to meet the needs of process conditions and improve energy utilization.

[0003] In the prior art, when recovering waste heat from steam, a U-tube heat exchanger is usually used to transfer the waste heat in the steam to the liquid through the tube side. The height of the liquid level in the shell side cylinder is affected by many factors such as the steam temperature and the liquid temperature in the shell side. If the liquid level is too high, it will affect the steam capacity in the shell side, and it cannot be guaranteed that there is enough steam in the shell side cylinder. If the liquid level is too low, it will affect the heat exchange efficiency. Therefore, it is necessary to reasonably control the liquid level in the shell side cylinder. However, the prior art cannot achieve the adjustment of the liquid height in the shell side cylinder, which affects the heat exchange of the tube side heat exchange tubes. In addition, when there are many impurities in the shell side, it cannot be cleaned and effective maintenance cannot be performed, resulting in low waste heat recovery efficiency and a short service life. Summary of the invention

[0004] The utility model provides a waste heat recovery device to solve the problems that the liquid level in the existing shell cylinder cannot be adjusted, the interior of the equipment cannot be effectively maintained, the maintenance is difficult and the service life is short.

[0005] The utility model provides a waste heat recovery device, including a shell-side cylinder, a water inlet and a liquid discharge port are provided at the bottom of the shell-side cylinder, and a steam outlet is provided at the top of the shell-side cylinder; a heat exchange tube is installed in the shell-side cylinder, the tube mouth of the heat exchange tube is connected to the tube-side cylinder, a gas inlet is provided at the top of the tube-side cylinder, a gas outlet is provided at the bottom, and a start-up steam inlet is also provided at the bottom of the shell-side cylinder; a liquid discharge pipe is fixed above the heat exchange tube in the tube-side cylinder, the liquid discharge pipe includes a plurality of sections of liquid discharge pipes connected by flanges, each liquid discharge pipe is connected to a liquid level pipe, a liquid level inlet is provided at the top of the liquid level pipe, a V-shaped water inlet is provided on the edge of the liquid level inlet, the pipe mouth flanges of the liquid discharge pipes at both ends are connected to flange blind plates, a tee is provided on the liquid discharge pipe in the middle, the tee is connected to a liquid discharge main pipe, and a main pipe blind plate is installed after the liquid discharge main pipe passes through the shell-side cylinder.

[0006] When implemented, it includes a shell-side cylinder, a water inlet and a liquid discharge port are provided at the bottom of the shell-side cylinder, the liquid discharge port is used to discharge liquid impurities to prevent clogging or corrosion of the pipe port, and a steam outlet is provided at the top of the shell-side cylinder so that the heated liquid can be vaporized into low-temperature steam for discharge and utilization; a heat exchange tube is installed in the shell-side cylinder, which is the main channel for heat exchange of the heat exchanger, and the pipe port of the heat exchange tube is connected to the tube-side cylinder, a gas inlet is provided at the top of the tube-side cylinder, and a gas outlet is provided at the bottom for the circulation of hot steam, and a vertical partition is provided on the side of the tube-side cylinder away from the heat exchange tube;

[0007] A start-up steam inlet is also provided at the bottom of the shell-side cylinder, into which a certain amount of hot steam is introduced for preheating inside the shell-side cylinder to prevent supercooled liquid from damaging the heat exchange tube or cylinder; a limit plate is provided above the heat exchange tube in the shell-side cylinder to prevent the heat exchange tube from moving due to high-temperature steam; a manhole is provided at one end of the shell-side cylinder away from the tube-side cylinder to facilitate maintenance of the interior of the equipment; a liquid level gauge port is provided on the tube-side cylinder, and a liquid level gauge is installed between the two liquid level gauge ports to observe the liquid level in the shell-side cylinder. When the liquid exceeds the set liquid level, it is convenient to drain the liquid so as to keep the liquid level within a certain range, which should not only submerge the heat exchange tube but also not be too high, while maintaining the steam volume within the set range;

[0008] A drain pipe is fixed above the heat exchange tube in the tube-side cylinder. The drain pipe includes several sections of drain pipes connected by flanges. The drain pipes are installed on the support frame through U-shaped buckles. The support frame is welded to the inner wall of the shell-side cylinder. Each drain pipe is connected to a liquid level pipe. A liquid level inlet is opened on the top of the liquid level pipe. A V-shaped water inlet is opened on the edge of the liquid level inlet. Four V-shaped water inlet notches are evenly opened on each liquid level pipe. The V-shaped water inlet notches gradually decrease from the top to the bottom. The liquid level in the shell-side cylinder is kept within the height range of the V-shaped water inlet notches. The height of the liquid level can be observed by the drainage main pipe. The estimated liquid level height and remaining drainage time of the liquid flow; the pipe mouth flanges of the drain pipe at both ends are connected with flange blind plates for sealing the two ends of the drain pipe; a tee is provided on the drain pipe in the middle, and the tee is connected with a drain main pipe. Specifically, the two ends of the tee are respectively connected to the drain pipe, and the other end is connected to the drain main pipe for discharging the liquid from the shell side cylinder; a main pipe blind plate is installed after the drain main pipe passes through the shell side cylinder for sealing under the heat exchange state; specifically, one end of the drain main pipe is connected to the tee through a flange, and the other end is connected to the main pipe blind plate through a flange.

[0009] When in use, the high-temperature gas enters the tube-side cylinder through the gas inlet, passes through the partition and enters the heat exchange tube, and after heat exchange in the heat exchange tube, returns to the tube-side cylinder and is discharged through the gas outlet;

[0010] At the same time, the liquid enters the shell-side cylinder through the water supply inlet, and the hot steam entering from the start-up steam inlet preheats the liquid. After the liquid exchanges heat with the high-temperature steam in the heat exchange tube, the liquid in the shell-side cylinder becomes water vapor, and then the steam is discharged through the steam outlet; a sufficient amount of steam must be ensured in the upper part of the shell-side cylinder, and the liquid level in the shell-side cylinder displayed by the liquid level gauge must be observed to keep the liquid submerged in the heat exchange tube; when the liquid level exceeds the V-shaped water inlet gap, the liquid rushes into the V-shaped water inlet gap from all directions and enters the liquid level pipe, and is collected from the liquid level pipe into each section of the drainage pipe, flows in the drainage pipe, and is finally discharged from the drainage main pipe to the outside of the shell-side cylinder; the liquid level is maintained within the range of the V-shaped water inlet gap. When the liquid level is high, the opening area of ​​the V-shaped water inlet gap is large and the drainage speed is fast. When the liquid level gradually decreases, the opening area of ​​the V-shaped water inlet gap is small, and the drainage speed slows down at the same time.

[0011] When the liquid level rises quickly, the liquid enters the liquid level pipe directly from the liquid level inlet to increase the drainage speed. When the liquid level rises rapidly and seriously exceeds the demand, the drainage main pipe cannot meet the drainage speed, the drainage port is opened to assist in speeding up the drainage speed.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model provides a waste heat recovery device, which adjusts the liquid level through a liquid level inlet, maintains the liquid level height of the shell-side cylinder within a controllable range, and can control the discharge flow rate of the liquid according to the height of the liquid level. Conversely, the approximate height of the liquid level can be obtained according to the liquid flow rate, thereby realizing automatic adjustment of the liquid level height, which can effectively improve the heat exchange efficiency.

[0014] The device is scientifically designed and easy to maintain, solving the problems of the inability to adjust the liquid level of existing equipment, inconvenient internal maintenance, and difficult repair. The device is simple to manufacture and can be carried out on existing equipment through transformation, saving product equipment to the greatest extent, which is beneficial to enterprise production, has low procurement costs, saves enterprise use costs, saves time and effort in use, is easy to operate, and has high economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 This is an assembly and use diagram of the liquid discharge pipe in the utility model.

[0017] Figure 3 for Figure 2 Sectional view at point A.

[0018] Figure 4 for Figure 3 Schematic diagram at point B in the middle.

[0019] The following are marked in the figure:

[0020] 1- partition, 2- gas inlet, 3- tube side cylinder, 4- heat exchange tube, 5- limit plate, 6- liquid level inlet, 7- steam outlet, 8- liquid level gauge port, 9- shell side cylinder, 10- manhole, 11- U-shaped buckle, 12- water inlet, 13- start-up steam inlet, 14- drain port, 15- gas outlet, 16- support frame, 17- flange blind plate, 18- tee, 19- main drain pipe, 20- main pipe blind plate, 21- liquid level pipe, 22- drain pipe, 2201- drain pipe, 23- V-type water inlet. DETAILED DESCRIPTION

[0021] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings.

[0022] A waste heat recovery device, such as Figures 1 to 4 As shown: it includes a shell-side cylinder 9, a water inlet 12 and a drain port 14 are provided at the bottom of the shell-side cylinder 9, the drain port 14 is used to discharge liquid impurities to prevent clogging or corrosion of the pipe port, and a steam outlet 7 is provided at the top of the shell-side cylinder 9 so that the heated liquid can be vaporized into low-temperature steam for discharge and utilization; a heat exchange tube 4 is installed in the shell-side cylinder 9, which is the main channel for heat exchange of the heat exchanger, and the pipe mouth of the heat exchange tube 4 is connected to the tube-side cylinder 3, a gas inlet 2 is provided at the top of the tube-side cylinder 3, and a gas outlet 15 is provided at the bottom for the circulation of hot steam, and a vertical partition 1 is provided on the side of the tube-side cylinder 3 away from the heat exchange tube 4;

[0023] A start-up steam inlet 13 is also provided at the bottom of the shell-side cylinder 9, and a certain amount of hot steam is introduced into the shell-side cylinder 9 for preheating inside the shell-side cylinder 9 to prevent supercooled liquid from damaging the heat exchange tube or cylinder; a limit plate 5 is provided above the heat exchange tube 4 in the shell-side cylinder 9 to prevent the high-temperature steam from causing the heat exchange tube 4 to move; a manhole 10 is provided at one end of the shell-side cylinder 9 away from the tube-side cylinder 3 to facilitate maintenance of the interior of the equipment; a liquid level gauge port 8 is provided on the tube-side cylinder 3, and a liquid level gauge is installed between the two liquid level gauge ports 8 to observe the liquid level in the shell-side cylinder 9. When the liquid exceeds the set liquid level, it is convenient to drain the liquid so as to keep the liquid level within a certain range, which should not only submerge the heat exchange tube but also not be too high, while maintaining the steam volume within the set range;

[0024] A drain pipe 22 is fixed above the heat exchange tube 4 in the tube cylinder 3. Figure 2 , 3 As shown: the drain pipe 22 includes a plurality of flange-connected drain pipes 2201, the drain pipes 2201 are mounted on the support frame 16 through the U-shaped buckle 11, the support frame 16 is welded to the inner wall of the shell cylinder 9, each drain pipe 2201 is connected to a liquid level pipe 21, the top of the liquid level pipe 21 is provided with a liquid level inlet 6, and the edge of the liquid level inlet 6 is provided with a V-shaped water inlet notch 23, as shown in FIG. Figure 4 As shown: four V-shaped water inlet gaps 23 are evenly opened on each liquid level pipe 21, and the V-shaped water inlet gap 23 gradually decreases from the top to the bottom. The liquid level in the shell-side cylinder 9 is maintained within the height range of the V-shaped water inlet gap 23. The liquid level and the remaining drainage time can be estimated by observing the liquid flow of the drainage main pipe 19; the pipe mouth flanges of the drainage pipe 2201 at both ends are connected with flange blind plates 17 for sealing the two ends of the drainage pipe 22, and the drainage pipe 2201 located in the middle is provided with a tee 18, and the tee 18 is connected to the drainage main pipe 19. Specifically, the two ends of the tee 18 are respectively connected to the drainage pipe 2201, and the other end is connected to the drainage main pipe 19 for discharging the liquid from the shell-side cylinder 9. After the drainage main pipe 19 passes through the shell-side cylinder 9, a main pipe blind plate 20 is installed for sealing under the heat exchange state. Specifically, one end of the drainage main pipe 19 is connected to the tee 18 through a flange, and the other end is flange-connected to the main pipe blind plate 20.

[0025] When in use, the high-temperature gas enters the tube-side cylinder 3 through the gas inlet 2, passes through the partition 1 and enters the heat exchange tube 4, and after heat exchange in the heat exchange tube 4, returns to the tube-side cylinder 3 and is discharged through the gas outlet 15;

[0026] At the same time, the liquid enters the shell cylinder 9 through the water inlet 12, and the hot steam entering from the start-up steam inlet 13 preheats the liquid. After the liquid exchanges heat with the high-temperature steam in the heat exchange tube 4, the liquid in the shell cylinder 9 becomes water vapor, and then the steam is discharged through the steam outlet 7; a sufficient amount of steam must be ensured in the upper part of the shell cylinder 9, and the liquid level in the shell cylinder 9 displayed by the liquid level gauge must be observed to keep the liquid buried in the heat exchange tube 4; when the liquid level exceeds the V-shaped water inlet gap 2 3. Liquid flows into the V-shaped water inlet notch 23 from all directions and enters the liquid level pipe 21. It is collected from the liquid level pipe 21 and enters each section of the liquid discharge pipe 2201. It flows in the liquid discharge pipe 22 and is finally discharged from the liquid discharge main pipe 19 to the outside of the shell side cylinder 9. The liquid level is maintained within the range of the V-shaped water inlet notch 23. When the liquid level is high, the opening area of ​​the V-shaped water inlet notch 23 is large and the liquid discharge speed is fast. When the liquid level gradually decreases, the opening area of ​​the V-shaped water inlet notch 23 is small and the liquid discharge speed is slowed down.

[0027] When the liquid level rises quickly, the liquid directly enters the liquid level pipe 21 from the liquid level inlet 6 to increase the drainage speed. When the liquid level rises rapidly and seriously exceeds the demand, the drainage main pipe 19 cannot meet the drainage speed, the drainage port 14 is opened to assist in speeding up the drainage speed.

[0028] The scope of protection claimed by the present invention is not limited to the above specific implementation methods. For those skilled in the art, the present invention may have various deformations and changes. Any modification, improvement and equivalent substitution made within the concept and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste heat recovery device, comprising a shell-side cylinder (9), wherein the bottom of the shell-side cylinder (9) is provided with a water inlet (12) and a liquid discharge port (14), and the top of the shell-side cylinder (9) is provided with a steam outlet (7); a heat exchange tube (4) is installed in the shell-side cylinder (9), the tube mouth of the heat exchange tube (4) is connected to the tube-side cylinder (3), the top of the tube-side cylinder (3) is provided with a gas inlet (2), and the bottom is provided with a gas outlet (15), characterized in that: A start-up steam inlet (13) is also provided at the bottom of the shell-side cylinder (9); a drain pipe (22) is fixed above the heat exchange tube (4) in the tube-side cylinder (3); the drain pipe (22) comprises a plurality of drain pipes (2201) connected by flanges; each drain pipe (2201) is connected to a liquid level pipe (21); a liquid level inlet (6) is provided at the top of the liquid level pipe (21); a V-shaped water inlet notch (23) is provided on the edge of the liquid level inlet (6); flange blind plates (17) are connected to the pipe orifices of the drain pipes (2201) at both ends; a tee (18) is provided on the drain pipe (2201) in the middle; the tee (18) is connected to a drain main pipe (19); and a main pipe blind plate (20) is installed after the drain main pipe (19) passes through the shell-side cylinder (9).

2. A waste heat recovery device according to claim 1, characterized in that: Four V-shaped water inlet notches (23) are evenly formed on each liquid level pipe (21), and the V-shaped water inlet notches (23) gradually decrease in size from top to bottom.

3. A waste heat recovery device according to claim 1, characterized in that: The drain pipe (2201) is mounted on a support frame (16) via a U-shaped buckle (11), and the support frame (16) is welded to the inner wall of the shell-side cylinder (9).

4. The waste heat recovery device according to claim 1, characterized in that: A vertical partition plate (1) is provided on a side of the tube-side cylinder (3) away from the heat exchange tube (4).

5. The waste heat recovery device according to claim 1, characterized in that: A manhole (10) is formed at one end of the shell-side cylinder (9) away from the tube-side cylinder (3).

6. A waste heat recovery device according to claim 1, characterized in that: The tube-side cylinder (3) is provided with a liquid level gauge port (8), and a liquid level gauge is installed between the two liquid level gauge ports (8).

7. The waste heat recovery device according to claim 1, characterized in that: One end of the drainage main pipe (19) is connected to the tee (18) via a flange, and the other end is connected to the main pipe blind plate (20) via a flange.

8. The waste heat recovery device according to claim 1, characterized in that: A limiting plate (5) is provided above the heat exchange tube (4) in the shell-side cylinder (9).

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