Drainage heat recycling device of pure steam generator

Abstract

The invention relates to the technical field of steam generators, in particular to a pure steam generator drainage heat recycling device which comprises supporting legs mounted at the bottom of a shell, a purified water inlet pipe is mounted at the top of the shell, and a heat recycling assembly for preheating purified water sequentially through a first stage and a second stage is mounted in the shell; the heat recovery assembly comprises a condensate water inlet tank installed at the top of the inner side of the shell and a sewage inlet tank installed at the bottom of the inner side of the shell, and the bottom of the condensate water inlet tank communicates with a condensate water heating assembly used for enabling an auxiliary pipe to surround a main pipe to jointly heat purified water and changing the flowing direction of the purified water; the top of the sewage inlet box is communicated with a sewage heating assembly, and a condensate water inlet pipe and a sewage inlet pipe are installed on one side of the shell. The problem that it is difficult to jointly preheat purified water after drained water at different temperatures is reasonably matched according to the difference between the temperature of condensate water and the temperature of sewage is solved.

Description

Technical Field

[0001] The invention relates to the technical field of steam generators, in particular to a pure steam generator wastewater heat recovery and utilization device. Background Art

[0002] In the process of preparing pure steam from purified water, continuous and regular sewage discharge is required to ensure the quality of pure steam, resulting in the discharge of 120-140℃ superheated hot water accounting for 20-30% of the total water intake. At the same time, pure steam preparation uses 165-180℃ industrial steam as a heat source to heat purified water. The condensed water of industrial steam needs to be discharged continuously, resulting in a large amount of heat energy waste.

[0003] Existing steam generators usually only absorb the heat of steam condensed water or the heat of discharged sewage during recovery and preheating, and then use the absorbed heat to preheat purified water without distinguishing the temperature difference between condensed water and sewage. Condensed water and sewage of different temperatures are reasonably combined to preheat purified water together, resulting in a low utilization rate of the waste heat of the steam generator, and the speed and temperature of heating purified water using waste heat are not ideal. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a pure steam generator wastewater heat recovery and utilization device, which solves the problem that it is difficult to reasonably coordinate wastewater of different temperatures to preheat purified water according to the difference in temperature between condensed water and sewage.

[0005] To achieve the above object, the present invention provides the following technical solution: a pure steam generator drainage heat recovery device, comprising a support leg installed at the bottom of a shell, a purified water inlet pipe installed at the top of the shell, and a heat recovery component installed inside the shell for preheating purified water in a first stage and a second stage in sequence;

[0006] The heat recovery component includes a condensate water inlet tank installed on the top inner side of the shell and a sewage inlet tank installed on the bottom inner side of the shell. The bottom of the condensate water inlet tank is connected to a condensate water heating component for a secondary pipe to surround the main pipe and heat the purified water together and change the flow direction of the purified water. The top of the sewage inlet tank is connected to a sewage heating component whose end swings when impacted by the water flow. A condensate water inlet pipe and a sewage inlet pipe respectively connected to the condensate water inlet tank and the sewage inlet tank are installed on one side of the shell.

[0007] Preferably, the condensate heating component preheats the purified water in the first stage, including a main pipe connected to the condensate inlet tank, and multiple sub-pipes connected to the main pipe, one end of the sub-pipe passes through the condensate inlet tank and extends to the outside of the shell, one main pipe and multiple main pipes form a group of condensate heating pipes, the condensate heating component is composed of multiple groups of condensate heating pipes, a bent pipe is connected between the sub-pipe and the main pipe, and inclined plates are fixedly connected on both sides of the bent pipe.

[0008] Preferably, an outer tube is sleeved on the top of the secondary pipeline, and an inner tube is movably extended to the outside of the outer tube. Both the outer tube and the inner tube are made of heat-insulating materials, and the inner tube slides up and down in accordance with the secondary pipeline.

[0009] Preferably, a spring is fixedly connected between the top of the inner tube and the condensate inlet tank, and transverse plates are fixedly connected to both sides of the inner tube.

[0010] Preferably, the sewage heating component preheats the purified water in the second stage, including an arc tube, both ends of the arc tube are connected to elastic tubes, one end of the elastic tube away from the arc tube is connected to a longitudinal tube, one of the longitudinal tubes is connected to the sewage inlet tank, and the other longitudinal tube penetrates the sewage inlet tank and extends to the outside of the shell.

[0011] Preferably, both sides of the longitudinal tube are fixedly connected with oblique plates, the top of the oblique plates is fixedly connected with an arc-shaped plate, and a water leakage groove is provided at one end of the oblique plate close to the longitudinal tube.

[0012] Preferably, a condensate drainage box is installed on the top of the shell, the top of the auxiliary pipe is connected to the condensate drainage box, the bottom of the condensate drainage box is fixedly connected to an annular plate sleeved on the outside of the shell, and the bottom of the annular plate is provided with a longitudinal groove adapted to the condensate inlet pipe.

[0013] Preferably, a sewage drainage tank is fixedly connected to the bottom of the shell, one end of the longitudinal pipe extending to the outside of the shell is connected to the sewage drainage tank, and one side of the condensate drainage tank and the sewage drainage tank are both connected to a drainage pipe.

[0014] Preferably, the top of the shell is provided with a plurality of longitudinal rods movably penetrating the condensate drainage box, two circular plates are installed outside the longitudinal rods, the condensate drainage box is located between the two circular plates, and the top of the auxiliary pipe is movably extended to the inside of the condensate drainage box.

[0015] Compared with the prior art, the present invention provides a pure steam generator wastewater heat recovery and utilization device, which has the following beneficial effects:

[0016] 1. Through the heat recovery component, the purified water is first heated by the condensed water heating component with a lower temperature in the upper half of the shell, and then heated again by the sewage heating component with a higher temperature when passing through the lower half of the shell, so that the condensed water and sewage of different temperatures are fully utilized, and the condensed water and sewage of different temperatures are reasonably combined to preheat the purified water together, so as to maximize the use of the heat of the steam generator drainage.

[0017] 2. By setting up the condensed water heating component, the area of ​​directly heating the purified water is increased through the cooperation of the main pipeline and the auxiliary pipeline, so that the purified water flowing along the shell direction has a tendency to flow horizontally, and the purified water in the same cross-section of the shell is evenly mixed, thereby improving the uniformity of the temperature of the purified water in the same cross-section of the shell.

[0018] 3. Through the provided spring and transverse plate, the length of the wrapped secondary pipeline can be automatically adjusted according to the speed of the purified water entering the shell, thereby reducing the influence of the secondary pipeline on the heating of the purified water by the main pipeline.

[0019] 4. The sewage heating component is set up to continuously swing under the thrust of the water flow and the elastic force of the elastic tube, thereby increasing the direct contact of the purified water within a larger range, while promoting the flow and mixing of the purified water, making the temperature of the purified water at different positions more uniform, and heating the purified water faster.

[0020] 5. The inclined plate and the arc plate not only limit the swing amplitude of the arc tube, but also guide a larger range of water to be heated on the surface of the longitudinal tube, thereby speeding up the speed of heating purified water using the heat of sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 A partial cutaway view of the present invention as a whole;

[0024] Figure 3 This is a schematic diagram of the structure of the present invention without the shell as a whole;

[0025] Figure 4 A schematic diagram of the connection between the heat recovery device of the present invention and the steam generator;

[0026] Figure 5 It is a schematic diagram of the structure of the condensed water heating component and the sewage heating component of the present invention;

[0027] Figure 6 It is a partial cutaway view of the outer tube and the inner tube of the present invention;

[0028] Figure 7 It is a partial structural schematic diagram of the sewage heating component of the present invention;

[0029] Figure 8 It is a partial cross-sectional view of the condensate drainage box and the annular plate of the present invention.

[0030] In the figure: 1. Shell; 2. Support legs; 3. Heat recovery assembly; 31. Condensate inlet tank; 32. Sewage inlet tank; 33. Condensate heating assembly; 331. Main pipeline; 332. Auxiliary pipeline; 333. Bent pipe; 334. Inclined plate; 34. Sewage heating assembly; 341. Arc pipe; 342. Elastic pipe; 343. Longitudinal pipe; 4. Outer pipe; 5. Inner pipe; 6. Spring; 7. Horizontal plate; 8. Oblique plate; 9. Arc plate; 10. Condensate drainage tank; 11. Sewage drainage tank; 12. Annular plate; 13. Longitudinal rod; 14. Circular plate. DETAILED DESCRIPTION

[0031] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0032] Pure steam generator is a device that uses purified water to produce pure steam. It is widely used in the sterilization and disinfection of medical and health care, biopharmaceutical industry, food industry and related equipment. It is a key pharmaceutical equipment required for the production of sterile drugs to prevent contamination by impurities such as heavy metals and pyrogens. At present, there are the following problems:

[0033] 1) In the process of preparing pure steam from purified water, continuous and regular sewage discharge is required to ensure the quality of pure steam, resulting in the discharge of 120-140°C superheated hot water accounting for 20-30% of the total water intake, causing a large amount of heat energy waste.

[0034] 2) Pure steam preparation uses 165-180℃ industrial steam as a heat source to heat purified water. The condensed water of industrial steam needs to be discharged continuously, resulting in a large amount of heat energy waste.

[0035] In order to solve these problems, the present invention proposes a device that uses condensed water and sewage at different temperatures together to fully utilize their temperatures to preheat purified water.

[0036] Embodiment 1

[0037] Since the temperatures of the condensed water and sewage discharged from the pure steam generator are different, and the temperature of the sewage exceeds that of the condensed water, if they are mixed together and then preheated for purified water, the temperature of the sewage will decrease, causing the maximum temperature for preheating the purified water to drop. Because the higher the temperature of the medium in contact with purified water, the faster it is heated. Therefore, when the temperature of the sewage decreases, the preheating effect on the purified water will be reduced. Therefore, it is necessary to align the sewage and condensed water in contact with the purified water for heating respectively. In order to optimize the effect of aligning the contact of two waters of different temperatures with purified water for heating, the present invention uses the first stage to first use the condensed water with a lower temperature to contact with the purified water, and the second stage to use the sewage with a higher temperature to contact with the purified water, so as to give full play to the heating effect of the two drainages of different temperatures on the purified water.

[0038] Figure 1-Figure 4 As one embodiment of the present invention, a pure steam generator wastewater heat recovery device is proposed, which consists of a shell 1 and a support leg 2 installed at the bottom of the shell 1. A purified water inlet pipe is installed on the top of the shell 1. A heat recovery component 3 for preheating purified water in a first stage and a second stage is installed inside the shell 1. The heat recovery component 3 consists of a condensate water inlet tank 31 installed at the top of the inner side of the shell 1 and a sewage inlet tank 32 installed at the bottom of the inner side of the shell 1. The bottom of the condensate water inlet tank 31 is connected to a condensate water heating component 33 for heating purified water with a secondary pipe surrounding the main pipe and changing the flow direction of the purified water. The top of the sewage inlet tank 32 is connected to a condensate water heating component 33 that is impacted by the water flow. A sewage heating component 34 is swung at the end thereof, and a condensate inlet pipe and a sewage inlet pipe respectively connected to the condensate inlet tank 31 and the sewage inlet tank 32 are installed on one side of the shell 1. The industrial steam condensate discharged from the steam generator is connected to the condensate inlet pipe, and the condensate is discharged into the condensate heating component 33 through the condensate inlet tank 31. The condensate heating component 33 is located in the upper half of the shell 1 to heat the purified water in the upper half of the shell 1; the sewage discharged from the steam generator is connected to the sewage inlet pipe, and the sewage is discharged into the sewage heating component 34 through the sewage inlet tank 32. The sewage heating component 34 is located in the lower half of the shell 1 to heat the purified water in the lower half of the shell 1. Figure 4 For example, after being preheated inside the shell 1 , purified water is discharged from the bottom of the shell 1 into the top of the steam generator 1 .

[0039] After the purified water enters the interior of the shell 1 from the top of the shell 1, it is first preliminarily heated by the condensed water heating component 33 with a lower temperature in the upper half of the shell 1, and then heated again by the sewage heating component 34 with a higher temperature when passing through the lower half of the shell 1. The temperature of the purified water is raised to 60-80°C before entering the steam generator, making full use of the condensed water and sewage at different temperatures. The condensed water and sewage at different temperatures are reasonably combined to preheat the purified water together, maximizing the use of the heat of the steam generator drainage.

[0040] Embodiment 2

[0041] Since the pipes for heating the purified water are evenly arranged along the length direction of the shell 1, and the purified water flows in a direction parallel to the pipe after entering the pipe, when the purified water passes through the pipe, the purified water in direct contact with the pipe is heated by the pipe and the temperature rises faster, while the purified water between the pipes can only be heated by the purified water after the temperature rises, resulting in a relatively slow rate of temperature rise of the purified water in this part, and finally the temperature of the purified water in different areas of the same cross section of the shell is different. The speed at which the purified water with a higher temperature is heated by the pipe is slow, resulting in a slow overall speed of the purified water being heated. Therefore, in order to improve the overall speed of the purified water being heated and also improve the uniformity of the temperature of the purified water in different areas of the same cross section, this embodiment refers to Figure 1-Figure 6 Based on the first embodiment, a specific structure of the condensed water heating component 33 is proposed.

[0042] The condensate heating assembly 33 preheats the purified water in the first stage, and is composed of a main pipe 331 connected to the condensate inlet tank 31, and a plurality of sub-pipes 332. One end of the sub-pipe 332 passes through the condensate inlet tank 31 and extends to the outside of the shell 1. A main pipe 331 and a plurality of main pipes 331 form a group of condensate heating pipes. The condensate heating assembly 33 is composed of a plurality of groups of condensate heating pipes. The bottom of the sub-pipe 332 is connected to the main pipe 331 through a bent pipe 333. Both sides of the bent pipe 333 are fixedly connected with inclined plates 334. Purified water enters the shell 1 from the purified water inlet pipe at the top of the shell 1. The industrial steam condensate discharged from the steam generator is passed into the condensate inlet tank 31, and then enters the main pipe 331, and then from the main pipe The bottom of the main pipe 331 is divided into multiple sub-pipes 332 through the bent pipe 333, and finally flows upward along the sub-pipe 332 and is discharged from the top of the shell 1. In this process, the purified water in direct contact with the main pipe 331 and the sub-pipe 332 is heated. When the purified water flows downward along the shell 1 to the bottom of the main pipe 331, the downward flowing purified water flows along the bent pipe 333 in a direction away from the main pipe 331, and at the same time flows to both sides along the inclined plate 334. The main pipe 331 and the sub-pipe 332 cooperate to increase the area of ​​directly heating the purified water, so that the purified water flowing along the direction of the shell 1 has a tendency to flow horizontally, and the purified water in the same cross section of the shell 1 is evenly mixed, thereby improving the uniformity of the temperature of the purified water in the same cross section of the shell 1.

[0043] Since the condensed water continuously heats the purified water during its flow along the main pipe 331, the temperature of the condensed water gradually decreases. Therefore, the higher the position, the greater the temperature difference between the water at the same height between the main pipe 331 and the auxiliary pipe 332. The water at the higher position of the auxiliary pipe 332 not only fails to heat the purified water entering the shell 1, but may even reduce the temperature of the purified water heated by the main pipe 331. Therefore, in order to reduce the influence of the auxiliary pipe 332 on the heating of the purified water by the main pipe 331, the present embodiment wraps the top of the auxiliary pipe 332 with a thermal insulation material to prevent the purified water heated by the main pipe 331 from then flowing into the auxiliary pipe 332. 332 and cooled by contact, specifically, it consists of an outer tube 4 sleeved on the top of the secondary pipe 332, the interior of the outer tube 4 is provided with an inner tube 5 which is movably extended to the outside, the outer tube 4 and the inner tube 5 are both made of heat insulating materials, the inner tube 5 slides up and down in accordance with the secondary pipe 332, the top of the inner tube 5 is fixed to the condensate inlet tank 31, when the top end of the secondary pipe 332 is wrapped by the outer tube 4 and the inner tube 5, the purified water that enters the shell 1 and is heated by the main pipe 331 will not contact with the top of the secondary pipe 332 and be cooled, and the bottom end of the secondary pipe 332 is close to the main pipe 331, and the temperature difference between it and the main pipe 331 is not much, so the purified water can still be heated.

[0044] In addition to the purified water being kept inside the shell 1 until it is heated to a suitable temperature and then passed into the steam generator, there is also a situation where the purified water enters the shell 1 from the top, is heated while flowing along the shell 1, and then is directly passed into the steam generator from the bottom of the shell 1. At this time, the cooling rate of the condensed water in the pipeline is affected by the speed at which the purified water enters the shell 1. When the speed at which the purified water enters the shell 1 is faster, more purified water contacts the condensed water and is heated in the same time, resulting in the condensed water being cooled faster. At this time, in order to reduce the impact of the secondary pipeline 332 on the heating of the purified water by the main pipeline 331, it is necessary to wrap up a longer distance of the secondary pipeline 332. Similarly, when the speed at which the purified water enters the shell 1 is slower, it is only necessary to wrap up a shorter distance of the secondary pipeline 332. Therefore, in order to flexibly adjust the wrapping of the secondary pipeline according to the speed at which the purified water enters the shell 1, 332, the present embodiment improves the connection mode of the outer tube 4 and the inner tube 5, two springs 6 connected to the condensed water inlet tank 31 are installed on the top of the inner tube 5, and cross plates 7 are fixedly connected on both sides of the inner tube 5. When the purified water enters the shell 1 at a faster speed, the force of the purified water pushing the cross plates 7 increases, thereby driving the inner tube 5 to stretch the springs 6 for a greater distance, so that the inner tube 5 descends a greater distance. At this time, the outer tube 4 and the inner tube 5 can wrap a longer secondary pipe 332; when the purified water enters the shell 1 at a slower speed, the force of the purified water pushing the cross plates 7 decreases, thereby driving the inner tube 5 to shorten the distance of stretching the springs 6, so that the inner tube 5 descends a smaller distance. At this time, the outer tube 4 and the inner tube 5 can wrap a shorter secondary pipe 332, and can automatically adjust the length of the wrapped secondary pipe 332 according to the purified water speed entering the shell 1, thereby reducing the influence of the secondary pipe 332 on the heating of the purified water by the main pipe 331.

[0045] Embodiment 3

[0046] Usually, the heating pipe is arranged along the length of the shell 1. When the purified water moves along the length direction of the shell 1, only a limited amount of purified water directly contacts the pipe to be heated, and then the heat is transferred to the surrounding purified water, resulting in a slower heating speed of the purified water. In order to increase the amount of purified water directly contacting the pipe, the present embodiment changes the structure of the heating pipe. Figure 1-Figure 7On the basis of the first embodiment, a sewage heating component 34 is proposed. The sewage heating component 34 preheats the purified water in the second stage and is composed of an arc tube 341. Both ends of the arc tube 341 are connected with elastic tubes 342. One end of the elastic tube 342 away from the arc tube 341 is connected with a longitudinal tube 343. One of the longitudinal tubes 343 is connected with the sewage inlet tank 32, and the other longitudinal tube 343 passes through the sewage inlet tank 32 and extends to the outside of the shell 1. The 120-140°C sewage discharged from the steam generator first passes into the sewage inlet tank 32, then enters into one of the longitudinal tubes 343, and finally passes through the arc tube 341 and the other longitudinal tube 343 and is discharged to the outside of the shell 1. In this embodiment, the sewage discharged from the steam generator at 120-140°C is first passed into the sewage inlet tank 32, and then enters into one of the longitudinal tubes 343, and finally passes through the arc tube 341 and the other longitudinal tube 343 to be discharged to the outside of the shell 1. During the process, the two longitudinal tubes 343 heat the water in the lower half of the shell 1. The heated water in the upper half of the shell 1 moves along the bent tube 333 and the inclined plate 334. The water originally flowing longitudinally moves laterally, causing the water inside the shell 1 to flow in an inclined direction. When the inclined flowing water contacts the arc tube 341 downward, it pushes the arc tube 341 to tilt, thereby driving the elastic tube 342 to bend and deform. Then, the arc tube 341 keeps swinging under the combined action of the thrust of the water flow and the elastic force of the elastic tube 342, thereby increasing the direct contact with the purified water within an enlarged range and promoting the flow and mixing of the purified water, so that the temperature of the purified water at different positions is more uniform and the purified water is heated faster.

[0047] In order to limit the swing amplitude of the arc tube 341 and prevent the arc tube 341 from being unable to return to its original position after the bending angle is too large, the present embodiment installs a structure for limiting the arc tube 341 on the sewage heating component 34, which is composed of an inclined plate 8 installed on both sides of the longitudinal tube 343. The top of the inclined plate 8 is fixedly connected with an arc plate 9. An end of the inclined plate 8 close to the longitudinal tube 343 is provided with a leakage groove. When the arc tube 341 swings a large amplitude, the arc tube 341 is blocked by the arc plate 9 and then pushed to the initial position by the elastic tube 342. The arc tube 341 can only swing between the arc plates 9 on both sides. At the same time, the water flowing downward from the top of the shell 1 flows along the arc plate 9 and the inclined plate 8 to the longitudinal tube 343, and finally flows downward from the leakage groove to the longitudinal tube 343. It not only plays a role in limiting the swing amplitude of the arc tube 341, but also can guide a larger range of water to flow to the surface of the longitudinal tube 343 to be heated, thereby accelerating the speed of heating purified water using the heat of the sewage.

[0048] Embodiment 4

[0049] In order to better drain the water discharged from multiple condensate pipes and sewage pipes from the shell 1 together, and to reduce the dust accumulation on the surface of multiple pipes extending outside the shell 1, this embodiment installs a drainage box for receiving condensate and sewage on the shell 1, and also sets a dustproof structure. Figure 1-Figure 8On the basis of the first embodiment, a condensate drainage box 10 is installed on the top of the shell 1, the top of the secondary pipe 332 is connected to the condensate drainage box 10, and a sewage drainage box 11 is installed at the bottom of the shell 1. One end of the longitudinal pipe 343 extends to the outside of the shell 1 and is connected to the sewage drainage box 11. One side of the condensate drainage box 10 and the sewage drainage box 11 are both connected with a drainage pipe. The bottom of the condensate drainage box 10 is fixedly connected with an annular plate 12 sleeved on the outside of the shell 1. The bottom of the annular plate 12 is provided with a longitudinal groove adapted to the condensate inlet pipe. The condensate and sewage are heated by the purified water inside the shell 1 and discharged into the condensate drainage box 10 and the sewage drainage box 11 respectively, and then discharged from the drainage pipe. The annular plate 12 wraps the secondary pipe 332 between the shell 1 and the condensate drainage box 10 to prevent dust from being deposited between the secondary pipe 332. Since the longitudinal pipe 343 is below the shell 1, the degree of dust on its surface is relatively light, so no dust prevention treatment is performed.

[0050] Since dust can still enter the inside of the annular plate 12 through the longitudinal groove of the annular plate 12 at the condensate inlet pipe, the dust inside the annular plate 12 needs to be cleaned at intervals. In order to reduce the difficulty of cleaning the dust, the condensate drainage box 10 is configured as a liftable structure in this embodiment, so that the condensate drainage box 10 can be raised to facilitate cleaning of the dust underneath. A plurality of longitudinal rods 13 that movably penetrate the condensate drainage box 10 are provided on the top of the shell 1. Two circular plates 14 are installed on the outside of the longitudinal rods 13. The condensate drainage box 10 is located between the two The top of the auxiliary pipe 332 is movably extended to the inside of the condensate drainage box 10 between the circular plates 14. When it is necessary to clean the dust on the top of the shell body 1, the condensate drainage box 10 is raised along the longitudinal rod 13. The top end of the auxiliary pipe 332 is always in the condensate drainage box 10. Then, the auxiliary pipe 332 on the top of the shell body 1 and the longitudinal pipe 343 at the bottom of the shell body 1 are blown to blow away the dust on both ends of the shell body 1. Finally, the condensate drainage box 10 is moved to the initial position to complete the cleaning of the dust on the surface of the pipe outside the shell body 1.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pure steam generator wastewater heat recovery device, comprising a support leg (2) mounted at the bottom of a shell (1), characterized in that: A purified water inlet pipe is installed on the top of the shell (1), and a heat recovery component (3) is installed inside the shell (1) for preheating the purified water in the first stage and the second stage in sequence; The heat recovery component (3) comprises a condensate water inlet tank (31) installed at the top of the inner side of the shell (1) and a sewage inlet tank (32) installed at the bottom of the inner side of the shell (1); the bottom of the condensate water inlet tank (31) is connected to a condensate water heating component (33) for heating purified water with a secondary pipe surrounding the primary pipe and changing the flow direction of the purified water; the top of the sewage inlet tank (32) is connected to a sewage heating component (34) whose end swings when impacted by water flow; and one side of the shell (1) is installed with a condensate water inlet pipe and a sewage inlet pipe respectively connected to the condensate water inlet tank (31) and the sewage inlet tank (32).

2. The heat recovery device according to claim 1, characterized in that: The condensate heating component (33) preheats purified water in the first stage, and includes a main pipe (331) connected to the condensate inlet tank (31), and a plurality of auxiliary pipes (332) connected to the main pipe (331), one end of the auxiliary pipe (332) passes through the condensate inlet tank (31) and extends to the outside of the shell (1), a bent pipe (333) is connected between the auxiliary pipe (332) and the main pipe (331), and inclined plates (334) are fixedly connected to both sides of the bent pipe (333).

3. The heat recovery device according to claim 2, characterized in that: An outer tube (4) is sleeved on the top of the secondary pipeline (332), and an inner tube (5) is movably extended to the outside of the outer tube (4).

4. The heat recovery device according to claim 3, characterized in that: A spring (6) is fixedly connected between the top of the inner tube (5) and the condensate inlet box (31), and transverse plates (7) are fixedly connected to both sides of the inner tube (5).

5. The heat recovery device according to claim 1, characterized in that: The sewage heating component (34) preheats purified water in the second stage, and comprises an arc-shaped tube (341), both ends of the arc-shaped tube (341) are connected to elastic tubes (342), and one end of the elastic tube (342) away from the arc-shaped tube (341) is connected to a longitudinal tube (343), one of the longitudinal tubes (343) is connected to the sewage inlet tank (32), and the other longitudinal tube (343) penetrates the sewage inlet tank (32) and extends to the outside of the shell (1).

6. The heat recovery device according to claim 5, characterized in that: Both sides of the longitudinal tube (343) are fixedly connected with an inclined plate (8), the top of the inclined plate (8) is fixedly connected with an arc-shaped plate (9), and one end of the inclined plate (8) close to the longitudinal tube (343) is provided with a water leakage groove.

7. The heat recovery device according to claim 2, characterized in that: A condensate drainage box (10) is installed on the top of the shell (1), the top of the auxiliary pipe (332) is connected to the condensate drainage box (10), and the bottom of the condensate drainage box (10) is fixedly connected to an annular plate (12) sleeved on the outside of the shell (1), and the bottom of the annular plate (12) is provided with a longitudinal groove adapted to the condensate inlet pipe.

8. The heat recovery device according to claim 7, characterized in that: The bottom of the shell (1) is fixedly connected to a sewage drainage tank (11); one end of the longitudinal pipe (343) extending to the outside of the shell (1) is connected to the sewage drainage tank (11); and one side of the condensate drainage tank (10) and the sewage drainage tank (11) are both connected to drainage pipes.

9. The heat recovery device according to claim 7, characterized in that: The top of the shell (1) is provided with a plurality of longitudinal rods (13) that movably penetrate the condensate drainage box (10), two circular plates (14) are installed outside the longitudinal rods (13), the condensate drainage box (10) is located between the two circular plates (14), and the top of the auxiliary pipeline (332) movably extends into the interior of the condensate drainage box (10).

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