Steam condensate waste heat utilization device and process based on energy saving and emission reduction

Abstract

The application discloses a steam condensate waste heat utilization device and process based on energy saving and emission reduction, relates to the technical field of steam condensate heat recovery, and comprises a flash tank, a tubular heat exchanger, a pump and a condensate tank. A bubble elimination assembly is arranged on a hot water pipeline, and the bubble elimination assembly is used for shearing and crushing the bubbles generated by flashing through fluid impact and mechanical stirring action, so that large-volume steam clusters are eliminated, and the impact of fluid on downstream equipment is reduced. In the application, the bubble elimination bin and related components are arranged before entering the tubular heat exchanger, so that the forced high-pressure saturated condensate water completes the flashing process in the special bin body before entering the tubular heat exchanger. Through the structure of the multistage orifice plate and the movable ball, the excess energy of the fluid is consumed, and the violent flashing originally possibly occurring in the heat exchanger is resolved in advance. The cavitation damage problem is solved, and the service life of the tubular heat exchanger is significantly improved.

Description

Technical Field

[0001] This invention relates to the field of steam condensate heat recovery technology, specifically to a device and process for utilizing waste heat from steam condensate based on energy conservation and emission reduction. Background Technology

[0002] Currently, the process refrigeration system uses electric ice machines for cooling. Although the operation is stable, the power consumption is too high, and additional ice machines need to be operated in summer due to insufficient cooling capacity. However, the heat exchange station has a large amount of hot water resources, providing favorable conditions for adding a hot water-type refrigeration unit project. This will not only reduce the power consumption of the process electric ice machines, but also reduce the amount of steam emitted from the condensate tank, thereby achieving the goal of comprehensively utilizing thermal energy resources and saving energy and reducing emissions.

[0003] Currently, the main method involves cooling the high-pressure saturated hot water in the flash tank to approximately 95°C using a heat exchanger (such as a shell-and-tube heat exchanger). This cooled hot water is then transported to the condensate tank as a driving heat source. A hot water absorption chiller draws 7°C chilled water, which is then integrated into the chilled water network for use in other production processes. Cooling water is drawn from the cooling water network opening. The expected technical specifications are: chilled water outlet temperature ≤ 7°C, unit cooling capacity ≥ 250 * 10⁴ kcal / h.

[0004] However, when the high-pressure saturated steam condensate from the flash tank enters the shell-and-tube heat exchanger, the pressure drops sharply. The originally saturated hot water instantly becomes superheated due to the pressure reduction, causing some of the water to rapidly absorb its sensible heat and vaporize, forming a vapor-liquid two-phase mixture. When water turns into steam, its volume expands dramatically (for example, about 1600 times at atmospheric pressure). This leads to a sharp increase in fluid velocity, which may cause strong impacts and vibrations on the heat exchanger tube bundle and affect the service life of the shell-and-tube heat exchanger. Summary of the Invention

[0005] The purpose of this invention is to provide a device and process for utilizing waste heat from steam condensate based on energy conservation and emission reduction, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a steam condensate waste heat utilization device based on energy saving and emission reduction, comprising:

[0007] Flash tanks, shell-and-tube heat exchangers, pumps, and condensate tanks;

[0008] The outlet of the flash tank is connected to the shell-side inlet of the shell-and-tube heat exchanger via a hot water pipeline, the shell-side outlet of the shell-and-tube heat exchanger is connected to the inlet of the condensate tank, and the outlet of the condensate tank is used to connect to a hot water absorption chiller.

[0009] A bubble elimination component is installed on the hot water pipeline. The bubble elimination component is used to shear and break the bubbles generated by flash evaporation through fluid impact and mechanical stirring before the high-pressure saturated steam condensate enters the shell and tube heat exchanger, so as to eliminate large-volume steam clusters and reduce the impact of fluid on downstream equipment.

[0010] Furthermore, the bubble elimination assembly includes a connecting chamber and a bubble elimination chamber, the connecting chamber and the bubble elimination chamber being connected and having a through-hole connection.

[0011] The bubble elimination chamber is provided with multiple slidable perforated plates along the axial direction. The perforated plates have through holes, and each through hole is connected to an installation tube. One end of the installation tube is fixed to an internally hollow fixed spherical part. A movable ball is placed inside the fixed spherical part, and a fluid cavity is formed between the movable ball and the inner wall of the fixed spherical part.

[0012] Furthermore, the fixed spherical part is provided with a water outlet, and the diameter of the movable ball is larger than the diameter of the water outlet and the inner diameter of the mounting pipe;

[0013] A universal ball part is fitted onto the fixed ball part, and the universal ball part is connected to a water outlet pipe, which is configured to cooperate with the water outlet.

[0014] Furthermore, an annular flange is fixedly connected to the universal ball part, and a return spring is provided between the annular flange and the orifice plate. The return spring is used to keep the water outlet pipe and the installation pipe coaxial under normal conditions.

[0015] Furthermore, the inner wall of the fixed spherical part is provided with rotating balls corresponding to the positions of the mounting pipe and the water outlet, and the rotating balls are used to block the moving balls to prevent them from blocking the water outlet or the mounting pipe.

[0016] Furthermore, the perforated plate and the inner wall of the bubble elimination chamber are in a dynamic sealing state; the surface of the movable ball is coated with a corrosion-resistant coating.

[0017] Furthermore, a connecting chamber is connected to the connecting chamber, and a piston is slidably and sealed inside the connecting chamber; the piston is connected to a pull rod, and the pull rod extends to the outside of the connecting chamber and is connected to a connecting arm;

[0018] The connecting arm is connected to a translation rod, the translation rod is provided with a rack segment, the connecting chamber is rotatably connected to a rotating shaft, the rotating shaft extends into the bubble elimination chamber and is threadedly connected to the orifice plate, and the rotating shaft is provided with a gear segment that meshes with the rack segment.

[0019] Furthermore, along the flow direction of the high-pressure saturated steam condensate, the pitch of the threaded section on the rotating shaft increases sequentially;

[0020] When the fluid flow rate increases and pushes the piston to move, the rack segment and gear segment cooperate to drive the rotating shaft to rotate, thereby increasing the distance between adjacent orifice plates.

[0021] Furthermore, a sealing cap is provided at the end of the connecting chamber away from the connecting chamber. The piston, the sealing cap, and the inner wall of the connecting chamber form a pressure balancing chamber, which is filled with a gas pressure medium to drive the piston to reset when the fluid flow rate decreases.

[0022] A waste heat recovery process for steam condensate based on energy conservation and emission reduction, applied to the waste heat recovery device described above, includes the following steps:

[0023] S1. High-pressure saturated steam condensate flows out of the flash tank and into the hot water pipeline;

[0024] S2. High-pressure saturated steam condensate experiences a sudden pressure drop in the bubble elimination component in the hot water pipeline, resulting in flash evaporation. The fluid impact drives the moving balls inside the component to move randomly, using mechanical stirring and disturbance to shear and break the large bubbles generated by flash evaporation into tiny bubbles, and consumes excess fluid energy to complete forced flash evaporation.

[0025] S3. The fluid after forced flash evaporation enters the shell side of the shell-and-tube heat exchanger and exchanges heat with the cold water in the tube side, cooling down to close to 95°C.

[0026] S4. The cooled hot water is pumped to the condensate tank and used as a driving heat source to be transported to the hot water absorption chiller to extract chilled water.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. In this invention, in the traditional process, when high-pressure saturated steam condensate directly enters the shell-and-tube heat exchanger, it undergoes instantaneous flash evaporation due to a sudden pressure drop, generating a vapor-liquid two-phase mixture. The rapid volume expansion leads to a surge in flow velocity, causing intense impact and vibration (cavitation). This invention, by incorporating a bubble elimination chamber and related components before the condensate enters the shell-and-tube heat exchanger, forces the high-pressure saturated condensate to complete the flash evaporation process within a dedicated chamber before entering the heat exchanger. The multi-stage orifice plate and movable ball structure consumes excess fluid energy, preemptively mitigating the potentially severe flash evaporation within the heat exchanger. This prevents the formation of large steam clusters in the heat exchanger tube bundle, thereby eliminating the intense impact and vibration on the tube bundle, solving the cavitation damage problem, and significantly improving the service life of the shell-and-tube heat exchanger.

[0029] 2. In this invention, a high-speed jet formed by an orifice plate impacts a moving sphere, causing the sphere to rotate randomly, collide, or vibrate at high frequency within the fluid cavity. This generates intense mechanical stirring and disturbance, which "shears" the large bubbles produced by flash evaporation into microbubbles, multiplying the gas-liquid interface area and greatly enhancing the mass and heat transfer processes. This allows the flash evaporation reaction to be completed in a very short time and in a very small space, ensuring efficient release and exchange of heat energy and improving the production efficiency of subsequent hot water absorption chillers.

[0030] 3. In this invention, a flow feedback regulation mechanism is constructed by setting up a piston section, a rack section, a gear section, and threaded sections with different pitches. When the flow rate is too high: the fluid pushes the piston section to move, driving the rotating shaft to rotate, and automatically increasing the spacing between the orifice plates at each stage by utilizing the difference in thread pitch. This allows the fluid to stay, expand, and mix over a longer distance, ensuring a more complete flash reaction and preventing incompletely vaporized "hot liquid" from directly impacting downstream components. When the flow rate recovers: the gas pressure drive mechanism in the balancing pressure chamber resets, and the orifice plate spacing returns to normal. This allows the internal reaction space to be automatically adjusted according to the fluid flow rate, ensuring both the treatment effect under high flow rates and the stirring and shearing efficiency under normal conditions, thus achieving adaptive operation of the device. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a steam condensate waste heat utilization device based on energy saving and emission reduction in this invention.

[0032] Figure 2 This is a schematic diagram showing the positional relationship of the connecting chamber, the bubble elimination chamber, and the connecting chamber after assembly in this invention;

[0033] Figure 3 for Figure 2 A schematic diagram of the positional relationship of the central structure from a first-person perspective;

[0034] Figure 4 for Figure 2 Schematic diagram of the positional relationships of the central structure after explosive decomposition;

[0035] Figure 5 for Figure 2 A schematic diagram showing the positional relationship of some structures after being cut open from a second-person perspective;

[0036] Figure 6 This is a schematic diagram showing the positional relationship of the perforated plate, mounting tube, and fixed spherical part after assembly in this invention.

[0037] Figure 7 for Figure 6 A schematic diagram showing the positional relationship of the structure from another perspective;

[0038] Figure 8This is a schematic diagram showing the positional relationship between the fixed spherical part, the universal spherical part, and the water outlet pipe after assembly in this invention;

[0039] Figure 9 for Figure 8 A schematic diagram showing the positional relationship of the middle section after it has been cut open.

[0040] Figure 10 for Figure 8 A schematic diagram of the positional relationships after the explosive decomposition of the medium structure.

[0041] The following are the annotations for each item in the figure: 1. Flash tank; 2. Pump; 3. Bubble elimination chamber; 4. Hot water pipe; 5. Connecting chamber; 6. Shell and tube heat exchanger; 7. Inlet pipe; 8. Condensate tank; 9. Rack section; 10. Gear section; 11. Rotating shaft; 12. Connecting chamber; 13. Sealing cover; 14. Connecting arm; 15. Pull rod; 16. Translation rod; 17. Threaded section; 18. Orifice plate; 19. Outlet pipe; 20. Universal ball part; 21. Piston part; 22. Threaded nut sleeve; 23. Through hole; 24. Moving ball; 25. Mounting pipe; 26. Return spring; 27. Annular flange; 28. Fixed ball part; 29. ​​Outlet; 30. Fluid chamber; 31. Rotating ball. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1-10This invention provides a technical solution: a steam condensate waste heat utilization device based on energy saving and emission reduction, comprising a flash tank 1, a shell-and-tube heat exchanger 6, a pump 2, and a condensate tank 8. The outlet of the flash tank 1 is connected to the shell-side inlet of the shell-and-tube heat exchanger 6 via a hot water pipe 4, and the inlet of the condensate tank 8 is connected to the shell-side outlet of the shell-and-tube heat exchanger 6 via an inlet pipe 7. That is, the high-pressure saturated steam condensate in the flash tank 1 is transported to the condensate tank 8 through the shell side of the shell-and-tube heat exchanger 6. Of course, a [missing information - likely a device or mechanism] is installed between the shell-side outlet of the shell-and-tube heat exchanger 6 and the inlet of the condensate tank 8. Pump 2 is used to transport the hot water cooled by shell-and-tube heat exchanger 6 to condensate tank 8. The tube side of shell-and-tube heat exchanger 6 is connected to an external cold water pipe through a pipeline. The cold water pipe is transported to the tube side of shell-and-tube heat exchanger 6 by another pump 2, so that the cold water flows in the tube side of shell-and-tube heat exchanger 6. During the flow, it can exchange heat with the high-pressure saturated steam condensate in the shell side of shell-and-tube heat exchanger 6, thereby cooling the high-pressure saturated steam condensate in flash tank 1 to about 95°C. The outlet of condensate tank 8 is connected to an external hot water absorption chiller.

[0044] Combination Figures 1 to 10 As shown, and please refer to the following: Figure 4 , Figure 5 The hot water pipe 4 is divided into two sections. The opposite ends of these two sections of the hot water pipe 4 are respectively connected to the bubble elimination chamber 3 and the connecting chamber 5. The opposite ends of the connecting chamber 5 and the bubble elimination chamber 3 are connected together by screws, and their inner cavities are in a through state. Multiple perforated plates 18 are installed in the bubble elimination chamber 3. Multiple through holes 23 are opened on the surface of the perforated plates 18. The perforated plates 18 can slide freely along the axial direction of the bubble elimination chamber 3 in the inner cavity of the bubble elimination chamber 3, and the periphery of the perforated plates 18 is sealed with the inner cavity wall of the bubble elimination chamber 3. Specifically, a sealing ring mounting groove can be opened on the periphery of the perforated plates 18, and a dynamic sealing ring can be installed in the sealing ring mounting groove, so that the periphery of the perforated plates 18 and the inner cavity wall of the bubble elimination chamber 3 are dynamically sealed. In this state, when the orifice plate 18 moves, the seal between the periphery of the orifice plate 18 and the inner wall of the bubble elimination chamber 3 is still maintained. An installation pipe 25 is threadedly connected to the through hole 23. A fixed spherical part 28 is coaxially fixed to one end of the installation pipe 25 in the downstream direction of the high-pressure saturated condensate. The fixed spherical part 28 is hollow, and an outlet 29 is opened on its periphery away from the installation pipe 25. The outlet 29, the installation pipe 25, and the inner cavity of the fixed spherical part 28 are in a continuous state. A movable ball 24 is placed in the inner cavity of the fixed spherical part 28. The diameter of the movable ball 24 is larger than the diameter of the outlet 29 and the inner diameter of the installation pipe 25, thus preventing the movable ball 24 from detaching from the outlet 29 and the installation pipe 25. Furthermore, a fluid cavity 30 is formed between the periphery of the movable ball 24 and the inner wall of the fixed spherical part 28.

[0045] After the high-pressure saturated steam condensate enters the bubble elimination chamber 3, the pressure drops sharply, which forces flash evaporation to occur within the chamber. The water flows through the orifice plate 18 into the installation pipe 25, forming a high-speed jet that directly impacts the movable ball 24 inside the fixed spherical part 28. This jet has enormous kinetic energy and is forcibly shattered and deflected after impacting the movable ball 24. The movable ball 24 is not fixed within the chamber (it may be suspended or rolling). The water flow drives the movable ball 24 to rotate, collide, or vibrate at high frequency within the fluid chamber 30. This intense mechanical stirring and disturbance "shears" the large bubbles generated by flash evaporation into microbubbles, multiplying the gas-liquid interface area and greatly enhancing the mass and heat transfer processes, allowing the flash evaporation reaction to be completed in a very short time and in a very small space. This helps prevent the formation of large steam clusters in the pipes. It transforms the "single-point flash evaporation" after the orifice plate 18 into "volume flash evaporation" within the fluid chamber 30. The stirring of the moving ball 24 accelerates the generation and release of bubbles, making the flash evaporation process more intense and uniform. At the same time, the moving ball 24 consumes excess energy of the fluid, reducing cavitation damage to downstream pipes. Since the high-pressure saturated steam condensate undergoes forced flash evaporation in the bubble elimination chamber 3, it will not affect the shell-and-tube heat exchanger 6, thus improving the service life of the shell-and-tube heat exchanger 6. Furthermore, the surface of the moving ball 24 is coated with a corrosion-resistant coating. In addition, the high-pressure saturated steam condensate is blocked by the multi-stage orifice plate 18, reducing the flow rate. This allows the high-pressure saturated steam condensate to undergo forced flash evaporation in the bubble elimination chamber 3. As a result, when the steam condensate enters the shell side of the shell-and-tube heat exchanger 6, flash evaporation will not occur, thereby reducing cavitation wear on the shell-and-tube heat exchanger 6.

[0046] Combination Figures 3 to 10 As shown, and with particular attention to point 5. Figure 7 , Figures 8 to 10A universal ball part 20 is fitted onto the spherical surface of the fixed spherical part 28. This universal ball part 20 can rotate omnidirectionally on the spherical surface of the fixed spherical part 28. A water outlet pipe 19 is fixedly connected to one side of the spherical surface of the universal ball part 20. The water outlet pipe 19 is used in conjunction with the water outlet 29. When the flow rate on one side of the fluid cavity 30 is large, causing the movable ball 24 to deviate within the cavity of the fixed spherical part 28, the hot water on the side with the larger flow rate exerts a greater impact force on the pipe wall of the water outlet pipe 19 through the water outlet 29 compared to other directions, thus causing the water outlet pipe 19 to deflect. Additionally, an annular flange 27 is fixedly connected to the side of the universal ball part 20 away from the water outlet pipe 19. The outer diameter of the annular flange 27 is larger than the diameter of the ball of the universal ball part 20. A return spring 26 is provided between the annular flange 27 and the surface of the orifice plate 18. The return spring 26 has its elastic force directed at both ends... The elastic abutment against the annular flange 27 and the surface of the orifice plate 18, under normal conditions, the return spring 26 can force the outlet pipe 19 to be aligned, so that the outlet pipe 19 and the mounting pipe 25 are coaxial, and the outlet pipe 19 and the outlet 29 are coaxial. In addition, the inner wall of the fixed spherical part 28 is provided with two sets of rotating balls 31, which correspond to the mounting pipe 25 and the outlet 29 respectively. The rotating balls 31 can rotate freely on the inner wall of the fixed spherical part 28 and are located in the fluid cavity 30. The purpose of the rotating balls 31 is to block the movable ball 24 when it is impacted by the fluid, so that the movable ball 24 will not get stuck at the opening of the mounting pipe 25 and the opening of the outlet 29, thereby preventing the movable ball 24 from blocking the outlet 29 and causing the fluid to be unable to flow in the fixed spherical part 28.

[0047] Combination Figures 2 to 5 As shown, and please refer to the following: Figure 4A connecting chamber 12 is fixedly connected to the wall of the connecting chamber 5. The axial direction of the connecting chamber 12 is perpendicular to the axial direction of the connecting chamber 5. The connecting chamber 12 is connected to the connecting chamber 5. The side of the connecting chamber 12 away from the connecting chamber 5 is open and fixedly connected to a sealing cover 13. A piston part 21 is coaxially engaged in the inner cavity of the connecting chamber 12. The piston part 21 slides freely in the inner cavity of the connecting chamber 12. Furthermore, the periphery of the piston part 21 is also sealed to the inner wall of the connecting chamber 12 through a dynamic sealing ring. The piston part 21, the sealing cover 13, and the inner wall of the connecting chamber 12 form a closed balanced pressure chamber. A pull rod 15 is coaxially connected to the end face of the piston part 21. The end of the pull rod 15 away from the piston part 21 protrudes from the sealing cover 13 and can slide freely. A connecting arm 14 is fixedly sleeved at the end of the pull rod 15 that protrudes from the sealing cover 13. A translation rod 16 is fixedly connected to each end of the connecting arm 14. Two rotating shafts 11 are provided on the connecting chamber 5. The rotating shafts 11 are rotatably connected to the connecting chamber 5 and penetrate into the bubble elimination chamber 3. Two mounting holes are opened on the surface of the orifice plate 18. A threaded nut 22 is installed in each mounting hole. The threaded nut 22 is fitted onto the rotating shaft 11, and the circumference of the rotating shaft 11 is provided with The threaded section 17, which is threaded to the nut 22, increases in pitch along the flow direction of the high-pressure saturated steam condensate. Two translation rods 16 have rack sections 9, and the circumference of the rotating shaft 11 has gear sections 10. The two rack sections 9 mesh with the two gear sections 10 respectively. When the fluid flow rate into the connecting chamber 5 is too high, the fluid will exert a thrust on the piston section 21, causing the piston section 21 to overcome the air pressure resistance of the balance chamber. This causes the piston section 21 to drive the pull rod 15 to move away from the connecting chamber 5, thus engaging the rack sections 9 and gear sections 10. The transmission enables the rotating shaft 11 to rotate. When the rotating shaft 11 rotates, the threaded nut 22 and the threaded section 17 are screwed together, which in turn drives the multi-stage orifice plates 18 to move in the same direction. In addition, since the pitch of the threaded section 17 increases sequentially, the spacing between the multi-stage orifice plates 18 will also increase, thereby increasing the volume between two adjacent orifice plates 18. As a result, when the fluid flow rate is too high, the fluid has a longer distance to stay in the cavity, expand, mix, and complete flash evaporation after passing through the previous orifice plate 18, thus making the flash evaporation reaction more complete and the bubbles grow more fully. This prevents the incompletely vaporized "thermal liquid" from directly impacting downstream components, reducing the risk of liquid erosion. When the fluid flow rate drops to normal, the air pressure in the balance pressure chamber will act on the piston 21, causing the piston 21 to move towards the inside of the connecting chamber 5 and enabling the rotating shaft 11 to rotate in the opposite direction. This restores the spacing between the multi-stage orifice plates 18, preventing the spacing from being too large, which would reduce the impact force on the movable ball 24 and reduce the stirring and shearing effect on the bubbles.

[0048] Working principle of the invention:

[0049] After the high-pressure saturated steam condensate in the flash tank 1 enters the connecting chamber 5, it will enter the bubble elimination chamber 3 and then enter the inner cavity of the mounting pipe 25 and the fixed spherical part 28 through the through hole 23. The pressure of the hot water drops sharply, which leads to flash evaporation and the generation of large bubbles. At the same time, the hot water flow will impact the moving ball 24, causing it to move irregularly. The moving ball 24 will shear and stir the water flow and bubbles, causing the large bubbles to be sheared and broken into small bubbles or even collapse. This will prevent cavitation from occurring on the inner wall of the shell and tube heat exchanger 6.

[0050] When the flow rate on one side of the fluid cavity 30 is large, the movable ball 24 will undergo a large displacement. This makes the impact force of the fluid on the wall of the outlet pipe 19 on the side of the fluid cavity 30 with a large flow rate greater than the impact force in other directions. This causes the outlet pipe 19 to deflect, and when the large flow rate of fluid flows out of the outlet 29, a certain degree of turbulence can be generated on the outside of the outlet 29. Under the action of turbulence, the fluid in the fluid cavity 30 can be made uniform, thereby reducing the wear on the inner wall of the outlet 29. At the same time, because the outlet pipe 19 can be deflected, the impact of the large flow rate of fluid on the pipe wall of the outlet pipe 19 can be reduced, so that it does not wear out too quickly.

[0051] Furthermore, when the fluid flow rate in the connecting chamber 5 is large, the force exerted by the fluid on the piston 21 will drive the piston 21 to move towards the sealing cover 13, allowing the piston 21 to overcome the air pressure resistance of the balance pressure chamber. This causes the piston 21 to drive the pull rod 15 to move away from the connecting chamber 5, enabling the rack segment 9 and the gear segment 10 to mesh and drive each other. This allows the rotating shaft 11 to rotate. When the rotating shaft 11 rotates, the threaded nut sleeve 22 and the threaded segment 17 will be screwed together, thereby driving the multi-stage orifice plate 18 to move in the same direction. In addition, since the pitch of the threaded segment 17 increases sequentially, the spacing between the multi-stage orifice plates 18 will increase accordingly, thereby increasing the volume between two adjacent orifice plates 18.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for utilizing waste heat from steam condensate based on energy conservation and emission reduction, characterized in that, include: Flash tank (1), shell and tube heat exchanger (6), pump (2) and condensate tank (8); The outlet of the flash tank (1) is connected to the shell-side inlet of the shell-and-tube heat exchanger (6) via a hot water pipe (4), and the shell-side outlet of the shell-and-tube heat exchanger (6) is connected to the inlet of the condensate tank (8). The outlet of the condensate tank (8) is used to connect to a hot water absorption chiller. A bubble elimination component is installed on the hot water pipeline (4). The bubble elimination component is used to shear and break the bubbles generated by flash evaporation through fluid impact and mechanical stirring before the high-pressure saturated steam condensate enters the shell-and-tube heat exchanger (6), so as to eliminate large-volume steam clusters and reduce the impact of fluid on downstream equipment.

2. The steam condensate waste heat utilization device based on energy saving and emission reduction according to claim 1, characterized in that, The bubble elimination assembly includes a connecting chamber (5) and a bubble elimination chamber (3), the connecting chamber (5) and the bubble elimination chamber (3) are connected and their inner cavities are interconnected; The bubble elimination chamber (3) is provided with a plurality of slidable perforated plates (18) along the axial direction. The perforated plates (18) have through holes (23). Each through hole (23) is connected to an installation tube (25). One end of the installation tube (25) is fixedly connected to a hollow fixed spherical part (28). A movable ball (24) is placed inside the fixed spherical part (28). A fluid cavity (30) is formed between the movable ball (24) and the inner wall of the fixed spherical part (28).

3. The steam condensate waste heat utilization device based on energy saving and emission reduction according to claim 2, characterized in that, The fixed spherical part (28) is provided with an outlet (29), and the diameter of the movable ball (24) is larger than the diameter of the outlet (29) and the inner diameter of the mounting pipe (25); The fixed spherical part (28) is fitted with a universal spherical part (20), and the universal spherical part (20) is connected to a water outlet pipe (19), which is configured to cooperate with the water outlet (29).

4. The steam condensate waste heat utilization device based on energy saving and emission reduction according to claim 3, characterized in that, An annular flange (27) is fixedly connected to the universal ball part (20). A return spring (26) is provided between the annular flange (27) and the orifice plate (18). The return spring (26) is used to keep the water outlet pipe (19) and the installation pipe (25) coaxial under normal conditions.

5. A steam condensate waste heat utilization device based on energy saving and emission reduction according to claim 3, characterized in that... The inner wall of the fixed spherical part (28) is provided with rotating balls (31) corresponding to the positions of the mounting tube (25) and the water outlet (29). The rotating balls (31) are used to block the moving ball (24) to prevent it from blocking the water outlet (29) or the mounting tube (25).

6. A steam condensate waste heat utilization device based on energy saving and emission reduction according to claim 2, characterized in that, The orifice plate (18) and the inner wall of the bubble elimination chamber (3) are in a dynamic sealing state; the surface of the movable ball (24) is coated with a corrosion-resistant coating.

7. A steam condensate waste heat utilization device based on energy saving and emission reduction according to claim 2, characterized in that, The connecting chamber (5) is connected to a connecting chamber (12), and a piston part (21) is slidably and sealed inside the connecting chamber (12); the piston part (21) is connected to a pull rod (15), and the pull rod (15) extends to the outside of the connecting chamber (5) and is connected to a connecting arm (14). The connecting arm (14) is connected to a translation rod (16), the translation rod (16) is provided with a rack section (9), the connecting chamber (5) is rotatably connected to a rotating shaft (11), the rotating shaft (11) extends into the bubble elimination chamber (3) and is threadedly connected to the orifice plate (18), the rotating shaft (11) is provided with a gear section (10) that meshes with the rack section (9).

8. A steam condensate waste heat utilization device based on energy saving and emission reduction according to claim 7, characterized in that, Along the flow direction of the high-pressure saturated steam condensate, the pitch of the threaded section (17) on the rotating shaft (11) increases sequentially; When the fluid flow rate increases and pushes the piston (21) to move, the rack section (9) and the gear section (10) cooperate to drive the rotating shaft (11) to rotate, thereby increasing the distance between adjacent orifice plates (18).

9. A steam condensate waste heat utilization device based on energy saving and emission reduction according to claim 7, characterized in that, The end of the connecting chamber (12) away from the connecting chamber (5) is provided with a sealing cover (13). The piston part (21), the sealing cover (13) and the inner wall of the connecting chamber (12) form a balanced pressure chamber. The balanced pressure chamber is filled with a gas pressure medium, which is used to drive the piston part (21) to reset when the fluid flow rate decreases.

10. A steam condensate waste heat utilization process based on energy conservation and emission reduction, applied to the waste heat utilization device according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1, High-pressure saturated steam condensate flows out from flash tank (1) and enters hot water pipeline (4); S2. The pressure of the high-pressure saturated steam condensate in the bubble elimination component on the hot water pipeline (4) drops sharply, generating flash evaporation. The moving ball (24) in the component is driven by fluid impact to make irregular movements. The large bubbles generated by flash evaporation are sheared and broken into small bubbles by mechanical stirring and disturbance, and excess fluid energy is consumed to complete forced flash evaporation. S3. The fluid after forced flash evaporation enters the shell side of the shell-and-tube heat exchanger (6) and exchanges heat with the cold water in the tube side, cooling down to close to 95°C. S4. The cooled hot water is pumped (2) to the condensate tank (8) and used as a driving heat source to be transported to the hot water absorption chiller to extract chilled water.

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