A system for deep utilization of latent heat of boiler steam

Abstract

The present application relates to the technical field of boiler heat exchange, and in particular to a system for deep utilization of latent heat of boiler steam, which comprises a steam boiler body and a heat exchanger arranged on the steam boiler body, wherein the heat exchanger is provided with an inlet pipe, an outlet pipe and an inlet channel, wherein the inlet pipe and the outlet pipe are provided with a plurality of plugging components, wherein the plugging components comprise a mounting ring fixed on the inner wall of the inlet pipe or the outlet pipe, an elastic ring sheet fixed on the mounting ring, and a plurality of support rods fixed on the inner wall of the elastic ring sheet, wherein the support rods slide in the inlet pipe along the diameter direction of the inlet pipe, when the inlet pipe or the outlet pipe is blocked, the elastic ring sheet is in a stretched state, and the plurality of support rods abut against each other, wherein the inlet pipe, the outlet pipe and the inlet channel are in a series state, and the inlet pipe is provided with a pushing component for driving the support rods to approach each other. The present application has the effect of reducing the mixing of cold water and hot water in the inlet channel.

Description

Technical Field

[0001] The present application relates to the technical field of boiler heat exchange, and in particular to a system for deep utilization of latent heat of boiler steam. Background Art

[0002] A steam boiler is a boiler device that produces steam. Its working principle is mainly based on the principle of thermodynamics. It generates heat through fuel combustion, and heats water to a boiling state to produce steam. When the pressure in the boiler reaches the set value, the steam will be output through the pipeline to the equipment or process that requires steam. It is widely used in the fields of electricity, chemical industry, textile, heating, etc. When the steam boiler is in use, the amount of water inside will decrease as the steam flows out. At this time, a water pump is needed to pass softened water into the steam boiler to keep the water level in the steam boiler at an appropriate position. However, when adding softened water to the steam boiler, the temperature of the steam boiler will drop due to the low temperature of the added water, causing the amount of steam in the boiler to decrease.

[0003] In the prior art, in order to reduce the impact on the amount of steam in the steam boiler, a heat exchanger is usually installed at the exhaust port of the steam boiler, cold water is introduced into the heat exchanger, flue gas with a certain temperature is also introduced into the heat exchanger, and finally the temperature of the softened water flowing out of the heat exchanger is increased, and then the softened water with increased temperature is introduced into the steam boiler.

[0004] The heat exchanger includes a smoke inlet pipe, a smoke exhaust pipe, a water inlet pipe and a water outlet pipe, and then the water inlet pipe, the water outlet pipe and the water inlet channel formed by the heat exchange plate are connected in parallel, such as Figure 1 As shown, when water is injected into the heat exchanger, water is introduced into the heat exchanger through the water inlet pipe, and then the water in the water inlet pipe will enter the water inlet channel at the same time, and then the water passing through the water inlet channel will enter the water outlet pipe, and finally enter the steam boiler through the water outlet pipe, flowing in the direction indicated by the arrow; however, in actual use, when the water level in the steam boiler has not dropped to the specified position, there is no need to add water to the steam boiler. At this time, the water in the heat exchanger cannot flow. When water needs to be added to the steam boiler, cold water is directly added to the heat exchanger, and then the cold water will push the hot water to move, and finally the hot water enters the steam boiler.

[0005] In the above-mentioned related technologies, since the water inlet channel formed by the water inlet pipe, the water outlet pipe and the heat exchange plate is connected in parallel, when adding water to the steam boiler, it is easy for the unheated water and the heated water to mix, thereby causing the temperature of the water added to the steam boiler to drop, affecting the steam generation in the steam boiler. Summary of the invention

[0006] The present application provides a system for deep utilization of latent heat of boiler steam, aiming to solve the problem of temperature drop of water added into the steam boiler in the related art.

[0007] The present application provides a system for deep utilization of latent heat of boiler steam using the following technical solutions:

[0008] A system for deep utilization of latent heat of boiler steam comprises a steam boiler body and a heat exchanger arranged on the steam boiler body, the heat exchanger is provided with an inlet pipe, an outlet pipe and an inlet channel, a plurality of plugging components are arranged in the inlet pipe and the outlet pipe, the plugging components comprise a mounting ring fixed on the inner wall of the inlet pipe or the outlet pipe, an elastic ring sheet fixed on the mounting ring and a plurality of support rods fixed on the inner wall of the elastic ring sheet, the support rods slide in the inlet pipe along the diameter direction of the inlet pipe, when the inlet pipe or the outlet pipe is blocked, the elastic ring sheet is in a stretched state, and the plurality of support rods abut against each other, at which time the inlet pipe, the outlet pipe and the inlet channel are in a series state, and a pushing component for driving the support rods to approach each other is arranged on the inlet pipe.

[0009] By adopting the above technical scheme, when water is added to the steam boiler body, the pushing assembly drives multiple support rods to move simultaneously, and then the support rods drive the elastic ring to move. When the multiple support rods abut against each other, the elastic ring is fully stretched, and then the water inlet pipe and the water outlet pipe are blocked at different positions. After the blocking is completed, cold water enters the water inlet channel from the water inlet pipe, enters the water outlet pipe from the water inlet channel, and then enters the next water inlet channel through the water outlet pipe. By entering multiple water inlet channels in turn, when the hot water in the water inlet channel is pushed to flow, the mixing of cold water and hot water in the water inlet channel can be reduced, and then the water entering the steam boiler body is kept at a higher temperature, and finally the amount of steam generated in the steam boiler body can be reduced.

[0010] Optionally, the pushing assembly includes a sliding rod fixed on a support rod and a pushing ring rotatably connected to a water inlet pipe, the sliding rod slides on the water inlet pipe along the diameter direction of the water inlet pipe, and one end extends out of the water inlet pipe, a pushing groove is provided on the pushing ring, the pushing groove is arranged along the circumference of the pushing ring, and the distance between one end of the pushing groove and the center of the pushing ring is greater than the distance between the other end of the pushing groove and the center of the pushing ring, and the sliding rod is slidably connected in the pushing groove.

[0011] By adopting the above technical solution, since the length between one end of the push groove and the center of the push ring is greater than the length between the other end of the push groove and the center of the push ring, when the push ring rotates, the sliding rod slides from one end of the push groove to the other end, which will push the sliding rod to slide on the water inlet pipe, thereby achieving the purpose of driving the support rod to move.

[0012] Optionally, a plurality of guide parts are fixedly mounted on the inner wall of the water inlet pipe, the plurality of guide parts correspond one to one with the plurality of plugging components, an annular mounting groove is opened on the guide part, and the annular mounting groove on the guide part is used to place the elastic ring sheet in a contracted state.

[0013] By adopting the above technical solution, when the water inlet pipe and the water outlet pipe are in parallel with the water inlet channel, the elastic ring piece is in a contracted state. At this time, the contracted elastic ring piece is in the annular mounting groove, thereby reducing the contracted elastic ring piece from blocking the flow of water.

[0014] Optionally, a circulation mechanism for promoting the circulation of water in the heat exchanger is provided on the water outlet pipe, and the circulation mechanism is arranged between the heat exchanger and the steam boiler body. The circulation mechanism includes a water tank connected to the water outlet pipe and a water pushing assembly arranged on the water tank, and the water pushing assembly is used to push the water in the water tank into the water inlet channel or absorb the water in the water inlet channel into the water tank.

[0015] By adopting the above technical solution, the water pushing component is used to push the water in the water tank into the water inlet channel or absorb the water in the water inlet channel into the water tank. When the steam boiler body does not need to be added with water, the flow of water in the heat exchanger can be increased, thereby accelerating the heat exchange rate of the water in the heat exchanger.

[0016] Optionally, the water pushing assembly includes a water pushing plate slidably connected in the water tank and a pushing cylinder fixed on the water tank, and a piston rod of the pushing cylinder is fixed on the water pushing plate.

[0017] By adopting the above technical solution, when the water in the heat exchanger needs to enter the water tank, the water pushing plate is directly moved to suck the water in the water inlet channel into the water tank. Then, when the water in the water tank needs to enter the water inlet channel, the pushing plate is moved in the opposite direction. The pushing plate pushes the water in the water tank into the water inlet channel. The purpose of water flow in the heat exchanger is achieved through the reciprocating movement of the water pushing plate. At the same time, when the water circulates in the heat exchanger, the elastic ring sheet can be prevented from blocking the water inlet pipe and the water outlet pipe, thereby increasing the fluidity of the water.

[0018] Optionally, both ends of the water inlet pipe are provided with a pushing assembly, and the pushing assembly is used to drive the support rod to slide on the water inlet pipe or the water outlet pipe.

[0019] Optionally, the pushing assembly includes a pushing ring rotatably connected to the water inlet pipe and a sliding rod slidably connected to the pushing ring, one end of the sliding rod is fixed to the support rod, and the other end passes through the water inlet pipe, and the sliding rod can slide on the water inlet pipe, and a pushing groove is provided on the pushing ring, and the pushing groove is configured as a waist-shaped groove, and a pushing shaft is slidably connected in the pushing groove, and the pushing shaft is rotatably connected to the sliding rod.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. The elastic ring is fully stretched, and then different positions of the water inlet pipe and the water outlet pipe are blocked. After the blocking is completed, cold water enters the water inlet channel from the water inlet pipe, enters the water outlet pipe from the water inlet channel, and then enters the next water inlet channel through the water outlet pipe. By entering multiple water inlet channels in sequence, when promoting the flow of hot water in the water inlet channel, the mixing of cold water and hot water in the water inlet channel can be reduced.

[0022] 2. When the steam boiler body does not need to add water, the water pusher assembly can increase the flow of water in the heat exchanger, thereby speeding up the heat exchange rate of the water in the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of water flow in a heat exchanger of prior art.

[0024] Figure 2 It is a schematic diagram of the steam boiler body structure of an embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the heat exchanger structure of an embodiment of the present application.

[0026] Figure 4 It is a schematic diagram of water flow in a heat exchanger according to an embodiment of the present application.

[0027] Figure 5 It is a schematic diagram of the structure of the blocking component of an embodiment of the present application.

[0028] Figure 6 It is a schematic diagram of the structure of the driving component of an embodiment of the present application.

[0029] Figure 7 It is a schematic diagram of the drive assembly and circulation mechanism of an embodiment of the present application.

[0030] : 01, steam boiler body; 02, water inlet pipe; 03, water outlet pipe; 04, smoke inlet pipe; 05, smoke outlet pipe; 1, heat exchanger; 11, heat exchange plate; 12, water inlet channel; 13, smoke inlet channel; 3, plugging assembly; 31, mounting ring; 32, elastic ring plate; 33, support rod; 4, guide part; 41, annular mounting groove; 42, push groove; 43, push shaft; 5, push assembly; 51, push ring; 52, sliding rod; 6, drive assembly; 61, driving wheel; 62, drive belt; 63, drive motor; 7, circulation mechanism; 71, water storage tank; 72, water pushing assembly; 721, water pushing plate; 722, push cylinder; 723, sealing plate. DETAILED DESCRIPTION

[0031] The following combination Figure 2-Figure 7 This application is described in further detail.

[0032] The present application embodiment discloses a system for deep utilization of latent heat of boiler steam. Figures 2 to 7 A system for deep utilization of latent heat of boiler steam includes a steam boiler body 01, on which a heat exchanger 1 is arranged, and the heat exchanger 1 is used to be connected to a smoke outlet 24 on the steam boiler body 01, and then softened cold water is introduced into the heat exchanger 1, and the cold water in the heat exchanger 1 is heated under the action of the flue gas, and then when it is necessary to replenish water in the steam boiler, the heated hot water is directly introduced into the steam boiler body 01, and since the water added into the steam boiler body 01 has a certain temperature, the situation where the steam amount in the steam boiler body 01 decreases can be reduced at this time.

[0033] Reference Figures 2 to 7 The heat exchanger 1 is provided with a water inlet pipe 02 and a water outlet pipe 03, and a plurality of heat exchange plates 11 are passed through the water inlet pipe 02 and the water outlet pipe 03. A channel is formed between two adjacent heat exchange plates 11, one channel is used to pass the flue gas, and the other channel is used to pass the cold water. The channel for passing the cold water is defined as the water inlet channel 12, and the channel for passing the flue gas is positioned as the smoke inlet channel 13. The smoke inlet channel 13 and the water inlet channel 12 are alternately arranged. At the same time, a smoke inlet pipe 04 and a smoke outlet pipe 05 are also provided on the heat exchange plate 11. The flue gas discharged from the steam boiler body 01 enters the smoke inlet channel 13, and the cold water enters the water inlet channel 12 at the same time. Then, under the action of the heat exchange plate 11, the cold water is heated, and finally the heated hot water is passed into the steam boiler body 01.

[0034] Reference Figures 2 to 7 A plurality of plugging components 3 are arranged in the water inlet pipe 02 and the water outlet pipe 03. The plugging components 3 are arranged at positions corresponding to the smoke inlet channel 13. The plugging components 3 are used to plug the water inlet pipe 02 and the water outlet pipe 03, and then make the water inlet pipe 02, the water outlet pipe 03 and the water inlet channel 12 in a series state. When water needs to be added to the steam boiler body 01, cold water is directly introduced into the water inlet pipe 02 through a water pump. The cold water will enter the water inlet channel 12 from the water inlet pipe 02 in turn, enter the water outlet pipe 03 from the water inlet channel 12, and then enter the next water inlet channel 12 through the water outlet pipe 03, and enter the water inlet pipe 02 from the water inlet channel 12. The series connection is achieved by entering multiple water inlet channels 12 in turn, and then when the cold water pushes the hot water to move, the mixing of cold water and hot water can be reduced.

[0035] Reference Figures 2 to 7The plugging assembly 3 includes a mounting ring 31 fixed on the inner wall of the water inlet pipe 02, an elastic ring piece 32 fixed on the mounting ring 31, and a support rod 33 fixed on the elastic ring piece 32. The support rod 33 is arranged along the length direction of the water inlet pipe 02. The elastic ring piece 32 is set to be a rubber material. In this embodiment, the connection position of the elastic ring piece 32 and the mounting ring 31 is defined as the outer wall, and the position connected to the support rod 33 is defined as the inner wall. A plurality of support rods 33 are arranged on the inner wall of the elastic ring piece 32. The support rods 33 are arranged along the circumference of the elastic ring piece 32. When the elastic ring piece 32 is in a stretched state, the plurality of support rods 33 abut against each other. At this time, the plurality of support rods 33 form a rod with a cylindrical structure. The rod with a cylindrical structure is coaxially arranged with the water inlet pipe 02. At this time, multiple positions of the water inlet pipe 02 are in a blocked state. When the water inlet pipe 02 needs to be in an open state, the support rod 33 is abutted against the inner wall of the water inlet pipe 02, and the elastic ring piece 32 is in a contracted state.

[0036] Reference Figures 2 to 7 A plurality of guide parts 4 are fixedly installed on the inner wall of the water inlet pipe 02. The plurality of guide parts 4 correspond to the plurality of plugging components 3 one by one. An annular mounting groove 41 is provided on the guide part 4. The mounting ring 31 is fixed in the annular mounting groove 41. When the elastic ring piece 32 is in a contracted state, the contracted elastic ring piece 32 is in the annular mounting groove 41, thereby reducing the contracted elastic ring piece 32 from blocking the flow of water. Inclined surfaces are provided at both ends of the guide part 4. By providing the inclined surfaces, the water in the water inlet pipe 02 can be easily water flows; since in the present embodiment, the blocking component 3 in the water inlet pipe 02 and the blocking component 3 in the water outlet pipe 03 have the same structure, the structure of the blocking component 3 in the water outlet pipe 03 will not be described in detail; in addition, in the present embodiment, the blocking components 3 in the water inlet pipe 02 and the water outlet pipe 03 are staggered, so as to facilitate the water inlet pipe 02, the water outlet pipe 03 and the water inlet channel 12 to be in a series state. At this time, there is only one channel for cold water to enter the water inlet channel 12, thereby achieving the purpose of reducing the mixing of cold water and hot water.

[0037] Reference Figures 2 to 7, a pushing assembly 5 is provided on the water inlet pipe 02, and the pushing assembly 5 is used to drive multiple support rods 33 to slide along the diameter direction of the water inlet pipe 02, so as to facilitate the control of the opening size of the elastic ring piece 32. The pushing assembly 5 includes a pushing ring 51 rotatably connected to the water inlet pipe 02 and a sliding rod 52 slidably connected to the pushing ring 51. One end of the sliding rod 52 is fixed to the support rod 33, and the other end passes through the water inlet pipe 02, and the sliding rod 52 can slide on the water inlet pipe 02. In this embodiment, multiple sliding rods 52 are provided, and multiple sliding rods 52 correspond to multiple support rods 33 one by one. The sliding rods 52 are driven to move by the rotation of the pushing ring 51, and then the support rods 33 are driven to move by the sliding rods 52. In this embodiment, the pushing assemblies 5 are provided at both ends of the water inlet pipe 02 and the water outlet pipe 03. Through the provision of two pushing assemblies 5, the support rods 33 can be made more stable when sliding.

[0038] Reference Figures 2 to 7 A push groove 42 is provided on the push ring 51, and the push groove 42 is set as a waist-shaped groove, and the length between one end of the push groove 42 and the center of the push ring 51 is greater than the distance between the other end of the push groove 42 and the push distance, and then a push shaft 43 is slidably connected in the push groove 42, and the push shaft 43 is rotatably connected to the sliding rod 52. In the initial state, the push shaft 43 is at the end with the longest length between the push groove 42 and the center of the push ring 51, and the elastic ring piece 32 is in a contracted state. Then, by rotating the push ring 51, the push ring 51 drives the push shaft 43 to slide in the push groove 42, and the sliding rod 52 will be pushed to move during the sliding of the push shaft 43, and the movement of the sliding rod 52 will push the support rods 33 closer to each other, and finally make the multiple support rods 33 in the water inlet pipe 02 abut together, and at this time, multiple positions of the water outlet pipe 03 are in a blocked state. In this embodiment, the push assembly 5 on the water outlet pipe 03 has the same structure as the push assembly 5 on the water inlet pipe 02, and the structure of the push assembly 5 on the water outlet pipe 03 is not described in detail.

[0039] Reference Figures 2 to 7 A driving assembly 6 is provided on the heat exchanger 1, and the driving assembly 6 is used to drive the pushing ring 51 on the water inlet pipe 02 and the pushing ring 51 on the water outlet pipe 03 to rotate simultaneously, so that the blocking assembly 3 on the water inlet pipe 02 and the water outlet pipe 03 can be adjusted simultaneously. The driving assembly 6 includes a driving wheel 61 fixed on the heat exchanger 1 and a driving belt 62 wound around the two pushing rings 51 and the driving wheel 61. A driving motor 63 is provided on the heat exchanger 1, and the output shaft of the driving motor 63 is fixed to the driving wheel 61. In this embodiment, the driving motor 63 is configured as a servo motor, and the driving motor 63 drives the driving wheel 61 to rotate forward and reverse, and then drives the pushing ring 51 to rotate forward or reverse under the action of the driving belt 62. While the pushing ring 51 rotates forward and reverse, the water outlet pipe 03 can be connected or blocked.

[0040] Reference Figures 2 to 7 A circulation mechanism 7 for promoting the circulation of water in the heat exchanger 1 is provided on the water outlet pipe 03. The circulation mechanism 7 is arranged between the heat exchanger 1 and the steam boiler body 01. The circulation mechanism 7 includes a water tank 71 connected to the water outlet pipe 03 and a water pushing component 72 arranged on the water tank 71. The water pushing component 72 is used to push the water in the water tank 71 into the water inlet channel 12 or absorb the water in the water inlet channel 12 into the water tank 71. When the steam boiler body 01 does not need to add water, the flow of water in the heat exchanger 1 can be increased, thereby accelerating the heat exchange rate of the water in the heat exchanger 1. Before the circulation mechanism 7 works, the water inlet pipe 02 and the water outlet pipe 03 need to be set to a blocked state.

[0041] Reference Figures 2 to 7 The water pushing assembly 72 includes a water pushing plate 721 slidably connected to the water tank 71 and a pushing cylinder 722 fixed on the water tank 71. The piston rod of the pushing cylinder 722 is fixed on the water pushing plate 721. A sealing plate 723 is provided on the water pushing plate 721. The sealing plate 723 is provided with an arc surface. When the water pushing plate 721 abuts against the bottom wall of the water tank 71, the sealing plate 723 seals the connection between the water tank 71 and the water outlet pipe 03. In addition, when hot water enters the steam boiler body 01, the connection between the water tank 71 and the water outlet pipe 03 is also in a blocked state.

[0042] Reference Figures 2 to 7 When the steam boiler body 01 does not need to be added with water, the water in the heat exchanger 1 is in a non-flowing state. At this time, the water pushing plate 721 is directly moved to suck the water in the water inlet channel 12 into the water storage tank 71. Then, when the water in the water storage tank 71 needs to enter the water inlet channel 12, the water pushing plate 721 is moved in the opposite direction. The water pushing plate 721 pushes the water in the water storage tank 71 into the water inlet channel 12. The reciprocating movement of the water pushing plate 721 achieves the purpose of water flow in the heat exchanger 1, thereby increasing the water heating rate. At the same time, when the water circulates in the heat exchanger 1, the elastic ring plate 32 can prevent the water inlet pipe 02 and the water outlet pipe 03 from being blocked. At this time, the water inlet channel 12 formed by the water inlet pipe 02, the water outlet pipe 03 and the heat exchange plate 11 are connected in parallel, thereby increasing the fluidity of the water.

[0043] The implementation principle of a system for deep utilization of latent heat of boiler steam in an embodiment of the present application is as follows: when water needs to be added to the steam boiler body 01, the push ring 51 drives the sliding rod 52 and the multiple support rods 33 to move simultaneously, and then the support rod 33 drives the elastic ring sheet 32 ​​to move when it moves. When the multiple support rods 33 abut against each other, the elastic ring sheet 32 ​​is fully stretched, and then the different positions of the water inlet pipe 02 and the water outlet pipe 03 are blocked. After the blocking is completed, cold water enters the water inlet channel 12 from the water inlet pipe 02, enters the water outlet pipe 03 from the water inlet channel 12, and then enters the next water inlet channel 12 through the water outlet pipe 03, and then enters the water inlet pipe 02 from the water inlet channel 12, and then enters other water inlet channels 12 in turn. At this time, when the cold water drives the hot water in the water inlet channel 12 to flow, the mixing of the cold water and the hot water in the water inlet channel 12 can be reduced, and then the water entering the steam boiler body 01 is in a state of higher temperature.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A system for deep utilization of latent heat of boiler steam, comprising a steam boiler body (01) and a heat exchanger (1) arranged on the steam boiler body (01), wherein the heat exchanger (1) is provided with a water inlet pipe (02) and a water outlet pipe (03) located on the same vertical plane and parallel to each other, a plurality of heat exchange fins (11) are passed through the water inlet pipe (02) and the water outlet pipe (03), a smoke inlet pipe (04) and a smoke outlet pipe (05) are arranged on the heat exchange fins (11), and a channel is formed between two adjacent heat exchange fins (11). , one channel is used to introduce flue gas, and the other channel is used to introduce cold water, the channel for introducing cold water is defined as a water inlet channel (12), and the channel for introducing flue gas is positioned as a smoke inlet channel (13), the smoke inlet channel (13) and the water inlet channel (12) are arranged alternately, the heat exchanger (1) is used to be connected to the smoke outlet (24) on the steam boiler body (01), the flue gas heats the cold water introduced into the heat exchanger (1), and the heated hot water is introduced into the steam boiler body (01) to replenish water in the steam boiler, characterized in that: A plurality of blocking components (3) are arranged in the water inlet pipe (02) and the water outlet pipe (03), and the blocking components (3) are arranged at positions corresponding to the smoke inlet passages (13). The blocking components (3) comprise a mounting ring (31) fixed on the inner wall of the water inlet pipe (02) or the water outlet pipe (03), an elastic ring sheet (32) fixed on the mounting ring (31), and a plurality of support rods (33) fixed on the inner wall of the elastic ring sheet (32), wherein the support rods (33) slide on the water inlet pipe (02) along the diameter direction of the water inlet pipe (02). When the blocking component (3) blocks different positions of the water inlet pipe (02) and the water outlet pipe (03), the elastic ring piece (32) is in a stretched state, and the plurality of support rods (33) abut against each other. At this time, the water inlet pipe (02), the water outlet pipe (03) and the water inlet channel (12) are in a series state; both ends of the water inlet pipe (02) are provided with a pushing component (5), and the pushing component (5) is used to drive the plurality of support rods (33) to slide along the diameter direction of the water inlet pipe (02), thereby controlling the opening size of the elastic ring piece (32); The pushing assembly (5) comprises a pushing ring (51) rotatably connected to the water inlet pipe (02) and a sliding rod (52) slidably connected to the pushing ring (51); one end of the sliding rod (52) is fixed to the support rod (33) and the other end passes through the water inlet pipe (02); and the sliding rod (52) can slide on the water inlet pipe (02); a plurality of sliding rods (52) are provided, and the plurality of sliding rods (52) and the plurality of support rods (33) correspond one to one; a pushing groove (42) is provided on the pushing ring (51), and the pushing groove (42) is provided as a waist-shaped groove. The push groove (42) is arranged along the circumference of the push ring (51), and the distance between one end of the push groove (42) and the center of the push ring (51) is greater than the distance between the other end of the push groove (42) and the center of the push ring (51). A push shaft (43) is slidably connected in the push groove (42), and the push shaft (43) is rotatably connected to the sliding rod (52). Push assemblies (5) are arranged at both ends of the water outlet pipe (03), and the push assembly (5) on the water outlet pipe (03) and the push assembly (5) on the water inlet pipe (02) have the same structure.

2. A system for deep utilization of latent heat of boiler steam according to claim 1, characterized in that: A plurality of flow guides (4) are fixedly mounted on the inner wall of the water inlet pipe (02), the plurality of flow guides (4) corresponding to the plurality of blocking components (3) one by one, an annular mounting groove (41) is provided on the flow guide (4), and the annular mounting groove (41) on the flow guide (4) is used to accommodate the elastic ring sheet (32) in a contracted state.

3. A system for deep utilization of latent heat of boiler steam according to claim 2, characterized in that: The water outlet pipe (03) is provided with a circulation mechanism (7) for promoting the circulation of water in the heat exchanger (1); the circulation mechanism (7) is arranged between the heat exchanger (1) and the steam boiler body (01); the circulation mechanism (7) comprises a water storage tank (71) connected to the water outlet pipe (03) and a water pushing component (72) arranged on the water storage tank (71); the water pushing component (72) is used to push the water in the water storage tank (71) into the water inlet channel (12) or to absorb the water in the water inlet channel (12) into the water storage tank (71).

4. A system for deep utilization of latent heat of boiler steam according to claim 3, characterized in that: The water pushing assembly (72) comprises a water pushing plate (721) slidably connected to the water storage tank (71) and a pushing cylinder (722) fixed to the water storage tank (71); a piston rod of the pushing cylinder (722) is fixed to the water pushing plate (721).

5. A system for deep utilization of latent heat of boiler steam according to claim 4, characterized in that: The water push plate (721) is provided with a sealing plate (723), and the sealing plate (723) is used to seal the connection between the water storage tank (71) and the water outlet pipe (03).

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