Dead steam and waste steam recovery energy saver

Abstract

The invention discloses a dead steam and waste steam recovery economizer, and relates to the technical field of heat energy engineering, the dead steam and waste steam recovery economizer comprises a heat exchanger shell and a first assembly installed on the heat exchanger shell, the first assembly comprises a connecting pipeline used for installing and connecting dead steam and supplying cold water, and the lower end of the middle of the connecting pipeline is fixedly connected with a tube pass outlet; the tube pass outlet is connected with a cold water supply pipeline communicated with the heat exchanger shell; through cooperative use of a plurality of components such as a driving gear, the circulation hole diameter of a round hole is adjusted in the deflection state of a short triangular body, when the dead steam flow is increased, the short triangular body and a long triangular body deflect outwards according to requirements to expand the circulation diameter of the round hole, inlet resistance is reduced, high-pressure dead steam accumulation and blockage are prevented, and when the flow is reduced, the diameter of the round hole is reduced; the negative pressure intensity is maintained, the gradient rate of the cross section of the flow channel is stable, waste steam is prevented from generating vortexes and reducing the heat exchange efficiency due to sudden change of the flow channel, the flow channel is adjustable to ensure that intermittent waste steam can be efficiently guided in, and the situation that a fixed flow channel cannot adapt to flow fluctuation is avoided.

Description

Technical Field

[0001] This invention relates to the field of thermal energy engineering technology, specifically to a waste steam recovery and energy-saving device. Background Technology

[0002] In industrial production sectors such as thermal power generation, chemical, textile, and papermaking, large amounts of waste steam or exhaust gas carrying residual heat are generated in their thermal systems. Directly releasing this waste steam or exhaust gas into the atmosphere not only wastes significant thermal energy resources, leading to high energy costs for businesses, but also causes thermal pollution and visual impact on the surrounding environment due to the moisture content in the steam forming "white smoke." Therefore, waste steam and exhaust gas recovery and energy-saving technologies have become a key research direction for reducing energy consumption and improving energy efficiency in the industrial sector.

[0003] Among existing waste steam recovery and energy-saving equipment, many schemes still use pipelines of uniform diameter for waste steam transportation, and only rely on subsequent heat exchange devices such as shell-and-tube heat exchangers to achieve waste heat recovery. Although this type of scheme has a simple structure and low initial investment, in actual industrial scenarios, it is limited by the inherent characteristics of pipelines of uniform diameter, making it difficult to solve the core contradiction in the waste steam transportation and recovery process. The specific shortcomings are as follows:

[0004] Low efficiency and high power consumption of exhaust steam conveying: The fluid velocity is uniform in the same diameter pipe, and it is impossible to form a local negative pressure effect through the optimization of the flow channel shape. When the exhaust steam pressure is low, there is no auxiliary suction in the pipe, and the exhaust steam is prone to stagnation at the conveying starting point due to insufficient power, resulting in unstable feed volume of the recovery system. To solve this problem, enterprises need to configure high-power induced draft fans or booster pumps to force the exhaust steam to flow. This not only increases the power consumption of the equipment, but also exacerbates the environmental burden of the workshop due to the noise pollution generated by the operation of the fans.

[0005] Poor waste heat recovery efficiency and serious energy waste: The uniform diameter pipe cannot optimize and adjust the flow rate of the exhaust steam, resulting in the flow state of the exhaust steam entering the heat exchange device being difficult to match the heat exchange requirements. On the one hand, if the heat exchange device needs to enhance heat exchange through turbulence, the exhaust steam flow rate transported by the uniform diameter pipe is slow, and the fluid is prone to forming a laminar boundary layer on the surface of the heat exchange tube, resulting in high heat exchange resistance and low heat exchange efficiency in some areas. On the other hand, if the heat exchange device needs to extend the contact time to achieve deep condensation, the uniform diameter pipe cannot reduce the exhaust steam flow rate, resulting in a short residence time of the exhaust steam in the heat exchange chamber. A large amount of waste heat is not fully absorbed and is discharged with the condensate, causing secondary waste of thermal energy resources.

[0006] Extremely poor adaptability to operating conditions and weak ability to cope with parameter fluctuations: In industrial production, the flow rate, pressure, and temperature of exhaust steam will change dynamically with the production load. For example, when the load of a thermal power plant unit is adjusted, the exhaust steam flow rate can fluctuate within the design value range. However, the flow channel cross-section of a pipe with a uniform diameter is fixed and cannot adjust the delivery characteristics according to parameter changes. When the exhaust steam flow rate increases sharply, the fixed pipe diameter can easily lead to excessively fast flow velocity in the pipe, a significant increase in local resistance loss, and even pipe vibration and pressure shock, threatening equipment safety. When the exhaust steam flow rate decreases sharply, "empty pipe sections" are easily formed in the pipe. After the air enters the system, it mixes with the exhaust steam, which not only reduces the heat absorption efficiency of the heat exchange medium, but may also cause "air blockage" due to air accumulation, forcing the recovery system to shut down.

[0007] Therefore, this invention proposes a waste steam recovery and energy-saving device to solve the above problems. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a waste steam recovery energy-saving device to solve the problems mentioned in the background section.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a waste steam recovery energy-saving device, comprising: a heat exchanger shell and a first component installed thereon, the first component comprising: a connecting pipe for connecting waste steam and a cold water supply, a tube-side outlet fixedly connected to the lower middle part of the connecting pipe, the tube-side outlet being connected to a cold water supply pipe communicating with the heat exchanger shell, a venturi middle part fixedly connected to the upper middle part of the connecting pipe, a venturi end fixedly connected to the end of the venturi middle part away from the connecting pipe, and a connecting flange installed at the end of the venturi end away from the venturi middle part, the connecting flange being used to connect the venturi end and an external waste steam conveying pipe;

[0010] The second component is used to adapt and adjust the diameter of the venturi center and the venturi end in the first component, and the second component is provided with two sets located at the end of the venturi end away from the venturi center and the middle of the venturi center, respectively.

[0011] Preferably, a left end cover is fixedly connected to one end of the heat exchanger shell, a right end cover is fixedly connected to the end of the heat exchanger shell away from the left end cover, a flange connection end is fixedly connected to the end of the right end cover away from the heat exchanger shell, and the end of the flange connection end away from the right end cover is fixedly connected to one end of the connecting pipe.

[0012] Preferably, the heat exchanger shell is cylindrical, and the heat exchanger shell contains a heat transfer tube bundle and a baffle plate for limiting the tube bundle and heat transfer. A hot water flow pipe is provided on the heat exchanger shell, and a partition is provided between the heat exchanger shell and the right end cover to separate the heat exchanger shell and the right end cover into a shell side and a tube side.

[0013] Preferably, the second component includes: a device housing fixedly connected to the middle of the venturi and the top of the venturi end, a drive gear being rotatably connected to the inner side of the device housing at the venturi end, a driven gear being meshed with one side of the drive gear, an arc-shaped groove being provided on the driven gear, and a sliding column being slidably connected inside the driven gear;

[0014] The third component is used to assist the driven gear in the second component in moving stably.

[0015] Preferably, the device housing has two housings of different sizes, the drive gear is connected to an external drive source, the driven gear is composed of a circular plate and a tooth block, and ten arc-shaped grooves are arranged equidistantly around the center of the driven gear.

[0016] Preferably, the second component further includes: a short triangular body fixedly connected to the sliding column, the short triangular body having an arc groove at its front end, a guide post fixedly connected to the upper surface of the short triangular body, a positioning circular plate provided above the driven gear, the positioning circular plate having a straight groove, and a circular hole provided in the middle of both the positioning circular plate and the driven gear.

[0017] Preferably, the arc groove is located near the center of the driven gear, and ten straight grooves are equidistantly arranged around the center of the positioning plate.

[0018] Preferably, the third component includes: an annular groove formed on one end face of the Venturi end away from the middle of the Venturi, the annular groove being circular, and a ring body being fixedly connected to the side of the driven gear on the Venturi end near the Venturi end, the ring body being slidably connected in the annular groove;

[0019] The fourth component is used to adjust the venturi center to fit a diameter different from the venturi tip.

[0020] Preferably, the fourth component includes: a cover fixedly connected to the bottom of the positioning circular plate; one set of the second component is disposed in the middle of the venturi, and a long triangular body is rotatably connected to the sliding column therein, the length of the long triangular body being greater than that of the short triangular body.

[0021] Compared with the prior art, the present invention provides an exhaust gas recovery energy-saving device, which has the following beneficial effects:

[0022] By coordinating the connecting pipes, the Venturi tube, and the Venturi center and end, the Venturi tube effect is formed due to the difference in their diameters. The negative pressure is generated by the change in the cross-section of the flow channel from the Venturi end to the Venturi center and then to the connecting pipe. This breaks through the limitations of the traditional passive collection method, actively and efficiently adsorbs low-pressure industrial exhaust steam, avoids the waste of heat energy caused by insufficient pressure in low-pressure exhaust steam, and improves the exhaust steam capture rate.

[0023] Through the coordinated use of multiple components such as drive gears, the flow diameter of the circular orifice is adjusted under the deflection state of the short triangular body. When the exhaust steam flow rate increases, the short and long triangular bodies deflect outwards as needed to expand the flow diameter of the circular orifice, reduce inlet resistance, and prevent high-pressure exhaust steam from accumulating and blocking. When the flow rate decreases, the diameter of the circular orifice is reduced to maintain the negative pressure intensity and the gradual change rate of the flow channel cross section, so as to avoid the exhaust steam from generating eddies due to abrupt changes in the flow channel, which would reduce the heat exchange efficiency. Moreover, the adjustable flow channel ensures that intermittent exhaust steam can be efficiently introduced, avoiding the situation where a fixed flow channel cannot adapt to flow fluctuations.

[0024] With the ring body and ring groove in place, the rotation trajectory of the driven gear is limited, ensuring that the driven gear always slides within the ring groove. This prevents misalignment between the driving gear and the driven gear, which could lead to jamming during adjustment. It also prevents the short triangular body from deviating from the straight groove during movement, thereby reducing the failure rate of the flow channel adjustment process and maintaining long-term stable flow. Furthermore, the entire adjustment process is achieved through mechanical transmission, eliminating the need for complex sensors and control programs. This reduces the failure rate of the mechanism under harsh working conditions and improves the industrial environmental adaptability of the equipment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a top view of the overall structure of the present invention;

[0027] Figure 3 This is a structural diagram of the first component of the present invention;

[0028] Figure 4 This is an internal structural view of the second component of the present invention;

[0029] Figure 5 This is a disassembled structural diagram of the second component of the present invention;

[0030] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle;

[0031] Figure 7 This is a structural diagram of the second and fourth components of the present invention;

[0032] Figure 8 This is a structural diagram of the second component of the present invention;

[0033] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point B in the middle.

[0034] In the picture:

[0035] 11. Heat exchanger shell; 12. Left end cover; 13. Right end cover; 14. Flange connection end;

[0036] 21. Connecting pipe; 22. Pipe outlet; 23. Venturi center; 24. Venturi end; 25. Connecting flange;

[0037] 31. Device housing; 32. Drive gear; 33. Driven gear; 34. Arc groove; 35. Sliding column; 36. Short triangular body; 37. Circular arc groove; 38. Guide column; 39. Positioning circular plate; 310. Straight groove; 311. Circular hole;

[0038] 41. Annular groove; 42. Annular body;

[0039] 51. Enclosure; 52. Long triangle. Detailed Implementation

[0040] 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.

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0042] Example

[0043] Please refer to Figures 1 to 6 As shown:

[0044] To address the problems mentioned in the technical solutions, this application provides a waste steam recovery energy-saving device, comprising: a heat exchanger shell 11 and a first component mounted thereon. The first component includes: a connecting pipe 21 for connecting waste steam and cold water supply; a tube outlet 22 fixedly connected to the lower middle part of the connecting pipe 21; a cold water supply pipe connected to the tube outlet 22 and communicating with the heat exchanger shell 11; a venturi middle part 23 fixedly connected to the upper middle part of the connecting pipe 21; a venturi end 24 fixedly connected to the end of the venturi middle part 23 away from the connecting pipe 21; and a connecting flange 25 installed at the end of the venturi end 24 away from the venturi middle part 23. The connecting flange 25 is used to connect the venturi end 24 and an external waste steam conveying pipe.

[0045] The second component is used to adapt and adjust the diameter of the Venturi middle part 23 and the Venturi end 24 in the first component, and the second component is provided with two sets located at the end of the Venturi end 24 away from the Venturi middle part 23 and the middle part of the Venturi middle part 23, respectively.

[0046] A left end cover 12 is fixedly connected to one end of the heat exchanger shell 11, and a right end cover 13 is fixedly connected to the end of the heat exchanger shell 11 away from the left end cover 12. A flange connection end 14 is fixedly connected to the end of the right end cover 13 away from the heat exchanger shell 11, and the end of the flange connection end 14 away from the right end cover 13 is fixedly connected to one end of the connecting pipe 21.

[0047] The heat exchanger shell 11 is cylindrical. The heat exchanger shell 11 contains a heat transfer tube bundle and a baffle plate for limiting the tube bundle and heat transfer. A hot water flow pipe is provided on the heat exchanger shell 11. A partition is provided between the heat exchanger shell 11 and the right end cover 13 to separate the heat exchanger shell 11 and the right end cover 13 into a shell side and a tube side.

[0048] The second component includes: a device housing 31 fixedly connected to the middle of the Venturi middle part 23 and the top of the Venturi end 24; a drive gear 32 is rotatably connected to the inner side of the device housing 31 on the Venturi end 24; a driven gear 33 is meshed on one side of the drive gear 32; an arc groove 34 is provided on the driven gear 33; and a sliding column 35 is slidably connected inside the driven gear 33.

[0049] The third component is used to assist the driven gear 33 in the second component to move stably.

[0050] The device housing 31 has two different sizes. The drive gear 32 is connected to an external drive source. The driven gear 33 is composed of a circular plate and a tooth block. Ten arc-shaped grooves 34 are arranged equidistantly around the center of the driven gear 33.

[0051] The second component also includes: a short triangular body 36 fixedly connected to the sliding column 35, a circular arc groove 37 at the front end of the short triangular body 36, a guide post 38 fixedly connected to the upper surface of the short triangular body 36, a positioning circular plate 39 above the driven gear 33, a straight groove 310 on the positioning circular plate 39, and a circular hole 311 in the middle of both the positioning circular plate 39 and the driven gear 33. The circular hole 311 is used to connect the Venturi end 24 and the external pipe of the connecting flange 25.

[0052] The circular arc groove 37 is located near the center of the driven gear 33, and ten straight grooves 310 are equidistantly arranged around the center of the positioning circular plate 39.

[0053] A further embodiment: Please refer to Figures 7 to 9 As shown:

[0054] The third component includes: an annular groove 41 formed on the end face of the Venturi end 24 away from the Venturi center 23. The annular groove 41 is circular. A ring body 42 is fixedly connected to the side of the driven gear 33 provided on the Venturi end 24 near the Venturi end 24. The ring body 42 is slidably connected in the annular groove 41.

[0055] The fourth component is used to adapt and adjust the Venturi middle section 23, which has a different diameter than the Venturi end 24.

[0056] The fourth component includes: a cover 51 fixedly connected to the bottom of the positioning circular plate 39; one set of the second component is disposed in the middle part 23 of the venturi, and a long triangle 52 is rotatably connected to the sliding column 35 therein, the length of the long triangle 52 being greater than that of the short triangle 36.

[0057] Among them, the straight groove 310 is used to adapt to the guide post 38 and guide the short triangular body 36 with the arc groove 37 to move towards the inner and outer rings of the driven gear 33.

[0058] The straight groove 310 is set at an angle, with one end close to the center of the positioning circular plate 39 and the other end extending obliquely to the outer ring of the positioning circular plate 39 in a clockwise direction.

[0059] The arc-shaped groove 34 is set at an angle, with one end close to the center of the driven gear 33 and the other end extending obliquely towards the outer ring of the driven gear 33 in a counterclockwise direction.

[0060] The ring 42 is used to slide within the ring groove 41 to limit the rotation of the driven gear 33.

[0061] Multiple short triangular bodies 36 are used to adjust the diameter of the circular hole 311.

[0062] The length of the long triangle 52 is adapted to the length of the Venturi end 24, so that the diameter of the inner cavity in the middle changes synchronously.

[0063] The diameter of the connecting pipe 21 is larger than that of the Venturi middle section 23, and the Venturi end 24 is tapered. The connecting pipe 21, the Venturi middle section 23 and the Venturi end 24 work together to form the Venturi effect.

[0064] Multiple circular grooves 37 are spliced ​​together to form a circular hole.

[0065] The working principle of all the content in the above embodiments is as follows:

[0066] In the initial state, multiple short triangular bodies 36 cause the circular hole 311 to be in its maximum open range.

[0067] The following describes the working process of each component:

[0068] During use, external industrial exhaust steam is connected to the connecting flange 25 through a pipe and initially converged through the Venturi end 24. The flow diameters of the connecting pipe 21, the middle part of the Venturi 23 and the Venturi end 24 are different, which together form the Venturi effect. The negative pressure is generated by the change of cross-section to actively draw in the exhaust steam and prevent the exhaust steam from escaping.

[0069] Furthermore, based on changes in exhaust steam parameters, an external drive source drives the drive gear 32 to rotate. The drive gear 32 meshes with the driven gear 33, causing the drive gear 32 to slide within the annular groove 41 via the ring body 42. The engagement between the annular groove 41 and the ring body 42 limits the movement trajectory of the driven gear 33, preventing misalignment between the drive gear 32 and the driven gear 33, and preventing the short triangular body 36 from jamming, ensuring the stability of flow regulation. At this time, the sliding column 35 slides within the arc-shaped groove 34 of the driven gear 33, driving the short triangular body 36 to move along the straight groove 310 on the positioning circular plate 39. When the exhaust steam flow increases, such as when the load increases, the drive gear 32 rotates in the reverse direction, driving the driven gear 33 to rotate in the forward direction. The sliding column 35 moves along the arc-shaped groove 34 towards the driven gear 33. As the outer ring of the 3rd ring moves, the end of the short triangular body 36 connected to the sliding column 35 moves synchronously to the outer ring. Further, under the constraint of the straight groove 310, the guide column 38 moves from the end near the center of the positioning circular plate 39 to the outer ring of the positioning circular plate 39 within the straight groove 310. This drives the end of the short triangular body 36 with the arc groove 37 to deflect towards the outer ring of the driven gear 33. The deflection of multiple short triangular bodies 36 cooperates to expand the flow diameter of the circular hole 311. When the exhaust steam flow decreases, such as in intermittent production conditions, the drive gear 32 rotates in the forward direction, and conversely, the driven gear 33 and other components rotate in the reverse direction, driving the end of the short triangular body 36 to deflect towards the middle of the driven gear 33, reducing the flow diameter of the circular hole 311, maintaining the negative pressure intensity of the Venturi effect, and ensuring efficient introduction of exhaust steam.

[0070] If the exhaust steam parameter is adjusted significantly and the flow diameter of the Venturi center 23 needs to be adjusted, the working process of multiple components inside the cover 51 is the same as above. Furthermore, due to the length setting of the long triangle 52, it can cover a longer flow area of ​​the Venturi center 23, maintaining a stable flow path. The adjustment of the Venturi center 23 and the Venturi end 24 can adapt to the exhaust steam flow requirements under different working conditions.

[0071] The diameter adjustment of the Venturi end 24 is mainly aimed at the initial convergence stage of exhaust steam entering the Venturi tube. By adjusting the exhaust steam inlet of the Venturi end 24, the balance between negative pressure intensity and flow area is optimized. The Venturi middle section 23, as the throat of the Venturi tube and the transition zone of the diffuser section, has its diameter changed to adjust the cross-sectional gradient of the transition zone, balance the flow rate and pressure of the exhaust steam, ensure the stability of the exhaust steam parameters entering the heat exchanger shell 11, and adapt to the use of Venturi end 24 and connecting pipe 21 with different diameters.

[0072] By coordinating the connecting pipe 21, the Venturi middle section 23, and the Venturi end 24, a Venturi tube effect is formed due to their different diameters. The negative pressure is generated by the change in the cross-section of the flow channel from the Venturi end 24 to the Venturi middle section 23 and then to the connecting pipe 21. This breaks through the limitations of the traditional passive collection method, actively and efficiently adsorbs low-pressure industrial exhaust steam, avoids the waste of heat energy caused by insufficient pressure in low-pressure exhaust steam, and improves the exhaust steam capture rate.

[0073] Through the coordinated use of multiple components such as the drive gear 32, the flow diameter of the circular hole 311 is adjusted under the deflection state of the short triangular body 36. When the exhaust steam flow rate increases, the short triangular body 36 and the long triangular body 52 deflect outward to expand the flow diameter of the circular hole 311 as needed, reducing inlet resistance and preventing high-pressure exhaust steam from accumulating and blocking. When the flow rate decreases, the diameter of the circular hole 311 is reduced to maintain the negative pressure intensity and the flow channel cross-sectional gradient is stable, avoiding the exhaust steam from generating eddies due to abrupt changes in the flow channel, which would reduce heat exchange efficiency. Moreover, the adjustable flow channel ensures that intermittent exhaust steam can be efficiently introduced, avoiding the situation where a fixed flow channel cannot adapt to flow fluctuations.

[0074] With the ring body 42 and the ring groove 41 configured, the rotation trajectory of the driven gear 33 is limited, so that the driven gear 33 always slides in the ring groove 41, avoiding misalignment between the drive gear 32 and the driven gear 33, which would cause the adjustment to jam. At the same time, it prevents the short triangular body 36 from deviating from the straight groove 310 when it moves, thereby reducing the failure rate of the flow channel adjustment process and maintaining the long-term stable flow of the flow channel. Meanwhile, the entire adjustment process is realized through mechanical transmission, without the need for complex sensors and control programs. Under harsh working conditions, it reduces the failure rate of the mechanism and improves the industrial environment adaptability of the equipment.

[0075] Please refer to the above work process. Figures 1 to 9 .

[0076] 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. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0077] 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 alterations 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 waste steam recovery and energy-saving device, comprising: The heat exchanger shell (11) and the first component mounted thereon are characterized in that: the first component includes: a connecting pipe (21) for installing and connecting the exhaust steam and the cold water supply, wherein the lower end of the middle of the connecting pipe (21) is fixedly connected to a tube outlet (22), the tube outlet (22) is connected to a cold water supply pipe communicating with the heat exchanger shell (11), the upper end of the middle of the connecting pipe (21) is fixedly connected to a venturi middle section (23), the end of the venturi middle section (23) away from the connecting pipe (21) is fixedly connected to a venturi end (24), and the end of the venturi end (24) away from the venturi middle section (23) is equipped with a connecting flange (25), the connecting flange (25) being used to connect the venturi end (24) and the external exhaust steam conveying pipe; The second component is used to: adapt and adjust the diameter of the Venturi middle part (23) and the Venturi end (24) in the first component, and the second component is provided with two sets located at the end of the Venturi end (24) away from the Venturi middle part (23) and the middle part of the Venturi middle part (23).

2. The waste steam recovery energy-saving device according to claim 1, characterized in that: A left end cover (12) is fixedly connected to one end of the heat exchanger shell (11), a right end cover (13) is fixedly connected to the end of the heat exchanger shell (11) away from the left end cover (12), a flange connection end (14) is fixedly connected to the end of the right end cover (13) away from the heat exchanger shell (11), and the end of the flange connection end (14) away from the right end cover (13) is fixedly connected to one end of the connecting pipe (21).

3. The waste steam recovery and energy-saving device according to claim 1, characterized in that: The heat exchanger shell (11) is cylindrical. The heat exchanger shell (11) contains a heat transfer tube bundle and a baffle plate for limiting the tube bundle and heat transfer. A hot water flow pipe is provided on the heat exchanger shell (11). A partition is provided between the heat exchanger shell (11) and the right end cover (13) to separate the heat exchanger shell (11) and the right end cover (13) into a shell side and a tube side.

4. The waste steam recovery energy-saving device according to claim 2, characterized in that: The second component includes: a device housing (31) fixedly connected to the middle of the Venturi middle part (23) and the top of the Venturi end (24), a drive gear (32) is rotatably connected to the inner side of the device housing (31) on the Venturi end (24), a driven gear (33) is meshed on one side of the drive gear (32), an arc groove (34) is provided on the driven gear (33), and a sliding column (35) is slidably connected inside the driven gear (33); The third component is used to assist the driven gear (33) in the second component to move stably.

5. The waste steam recovery and energy-saving device according to claim 4, characterized in that: The device housing (31) has two parts of different sizes. The drive gear (32) is connected to an external drive source. The driven gear (33) is composed of a circular plate and a tooth block. The arc groove (34) has ten parts equidistantly arranged around the center of the driven gear (33).

6. The waste steam recovery energy-saving device according to claim 5, characterized in that: The second component also includes: a short triangular body (36) fixedly connected to the sliding column (35), the front end of the short triangular body (36) is provided with an arc groove (37), a guide post (38) is fixedly connected to the upper surface of the short triangular body (36), a positioning circular plate (39) is provided above the driven gear (33), a straight groove (310) is provided on the positioning circular plate (39), and a circular hole (311) is provided in the middle of both the positioning circular plate (39) and the driven gear (33).

7. The waste steam recovery energy-saving device according to claim 6, characterized in that: The arc groove (37) is located near the center of the driven gear (33), and ten straight grooves (310) are equidistantly arranged around the center of the positioning circular plate (39).

8. The waste steam recovery energy-saving device according to claim 4, characterized in that: The third component includes: an annular groove (41) formed on the end face of the Venturi end (24) away from the middle part (23) of the Venturi, the annular groove (41) being circular, and a ring body (42) fixedly connected to the side of the driven gear (33) provided on the Venturi end (24) near the Venturi end (24), the ring body (42) being slidably connected in the annular groove (41); The fourth component is used to adapt and adjust the Venturi middle section (23) which has a different diameter than the Venturi end (24).

9. The waste steam recovery energy-saving device according to claim 8, characterized in that: The fourth component includes: a cover (51) fixedly connected to the bottom of the positioning circular plate (39), one of the second components is disposed in the middle (23) of the venturi, and a long triangle (52) is rotatably connected to the sliding column (35) therein, the length of the long triangle (52) being greater than that of the short triangle (36).

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