Direct contact type boiling heat exchanger

Abstract

The invention belongs to the technical field of heat exchangers, and particularly relates to a direct contact type boiling heat exchanger which comprises a body, a heat conduction cylinder is connected in the body, an inner cavity of the body is divided into a low-temperature gas buffer cavity and a high-temperature gas buffer cavity through the heat conduction cylinder, the high-temperature gas buffer cavity is located in the heat conduction cylinder, and the low-temperature gas buffer cavity is located outside the heat conduction cylinder. A waste gas pipe and a gas inlet pipe are arranged at the top of the body, a waste gas discharge pipe and a hot gas discharge pipe are arranged at the bottom of the body, the waste gas pipe and the waste gas discharge pipe communicate with the high-temperature gas buffer cavity, the gas inlet pipe and the hot gas discharge pipe communicate with the low-temperature gas buffer cavity, a reset unit is slidably connected into the waste gas pipe, and a filtering unit is arranged on the reset unit; a piston pushing unit is arranged below the waste gas pipe, and the bottom end of the filtering unit penetrates through the bottom end of the waste gas pipe and is in transmission fit with the output end of the piston pushing unit. The filter is simple in structure and high in reliability, daily cleaning of the filter is facilitated, and working efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchangers, and in particular relates to a direct contact boiling heat exchanger. Background Art

[0002] Direct contact heat exchange refers to the process of heat exchange between high-temperature medium and low-temperature medium in direct contact. The two media can be the same substance or different. During the operation of the direct contact heat exchanger, the gas is usually filtered to ensure the service life of the internal components of the equipment.

[0003] Although the existing direct contact heat exchanger can recover heat and filter exhaust gas during use, the filter element in the existing heat exchanger is not provided with a mechanism that is convenient for users to maintain it. Therefore, users need to frequently disassemble and assemble it for maintenance, which reduces the practicality of the existing heat exchanger. For this reason, we propose a direct contact boiling heat exchanger. Summary of the invention

[0004] The object of the present invention is to provide a direct contact boiling heat exchanger to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned objectives, the present invention provides a direct contact boiling heat exchanger, comprising a main body, a heat-conducting tube connected to the main body, an inner cavity of the main body being divided by the heat-conducting tube into a low-temperature gas buffer cavity and a high-temperature gas buffer cavity, the high-temperature gas buffer cavity being located inside the heat-conducting tube, and the low-temperature gas buffer cavity being located outside the heat-conducting tube, an exhaust pipe and an air intake pipe being provided on the top of the main body, an exhaust pipe and a hot gas exhaust pipe being provided on the bottom of the main body, the exhaust pipe and the exhaust pipe being communicated with the high-temperature gas buffer cavity, the air intake pipe and the hot gas exhaust pipe being communicated with the low-temperature gas buffer cavity, a reset unit being slidably connected in the exhaust pipe, a filter unit being provided on the reset unit, a piston pushing unit being provided below the exhaust pipe, the bottom end of the filter unit passing through the bottom end of the exhaust pipe and being transmission-coordinated with the output end of the piston pushing unit.

[0006] Preferably, the reset unit includes a second piston which is slidingly sealed and arranged in the exhaust pipe, both ends of the exhaust pipe are connected with annular plugging plates, a plurality of straight rods are connected between the two annular plugging plates, the straight rods pass through the edge of the second piston, and the second piston and the straight rods are slidingly sealed together, a spring is provided on the sliding sleeve of the straight rod, the top end of the spring abuts against the annular plugging plate located at the top end of the exhaust pipe, and the bottom end of the spring abuts against the top surface of the second piston, and the filter unit is arranged on the second piston.

[0007] Preferably, the filter unit includes a straight pipe, the piston is fixedly sleeved on the straight pipe, the top end of the straight pipe is connected to a filter element, the bottom end of the straight pipe passes through the annular blocking plate located at the bottom end of the exhaust pipe, and the bottom end of the straight pipe is connected to the telescopic end of the piston pushing unit; a plurality of air outlet holes are opened on the outer wall of the straight pipe, the air outlet holes are located below the exhaust pipe, and the straight pipe is connected to the high-temperature gas buffer chamber through the air outlet holes.

[0008] Preferably, the piston pushing unit includes a piston cylinder, the exhaust pipe and the main body are coaxially arranged with the piston cylinder, a piston rod is slidably connected in the piston cylinder, a piston one is fixedly sleeved on the piston rod, the piston one is slidably and sealingly matched with the inner wall of the piston cylinder, the top end of the piston rod passes through the inner top wall of the piston cylinder and is connected to the bottom end of the straight tube, a plurality of exhaust holes are opened on the top wall of the piston cylinder, the bottom end of the piston cylinder is connected to a plurality of connecting pipes, the ends of the connecting pipes pass through the bottom wall of the main body and are connected to the low-temperature gas buffer chamber, and solenoid valves are provided on the connecting pipes and the piston one.

[0009] Preferably, the bottom wall of the main body is connected with a plurality of circular tubes, the circular tubes are connected with the low-temperature gas buffer chamber, the bottom ends of the circular tubes are connected with an end of the connecting tube away from the piston cylinder, and the solenoid valve is arranged at the connection between the circular tube and the connecting tube.

[0010] Preferably, a heat-conducting member is sleeved on the piston cylinder, the heat-conducting member is arranged in the heat-conducting cylinder, a water storage cavity is arranged in the heat-conducting member, and the water storage cavity is connected to a circulating water component.

[0011] Preferably, the heat conducting element is a spiral heat pipe.

[0012] Preferably, the circulating water assembly includes a water tank, the top end of the water tank is connected to the upper end of the spiral heat pipe through an upper water pipe, the bottom end of the water tank is connected to the lower end of the spiral heat pipe through a lower water pipe, and a circulating water pump is provided on the upper water pipe.

[0013] Preferably, an electromagnetic valve is provided on the air intake pipe.

[0014] Compared with the prior art, the present invention has the following advantages and technical effects:

[0015] The present invention provides a direct contact boiling heat exchanger, which introduces high-temperature exhaust gas through an exhaust pipe and filters it through a lifting filter mechanism, and then enters a high-temperature gas buffer cavity separated by a heat-conducting tube, and simultaneously exchanges heat with the low-temperature gas entering the low-temperature gas buffer cavity in the main body through an air inlet pipe. The exhaust gas that completes the heat exchange is discharged through an exhaust pipe for subsequent purification treatment, and the heated low-temperature gas is discharged through a hot gas exhaust pipe for utilization.

[0016] When the filter unit needs to be cleaned, gas only needs to be introduced into the piston push unit. The output end of the piston push unit will push the filter unit out of the exhaust pipe, which is convenient for workers to clean and maintain daily. After the maintenance is completed, the gas in the piston push unit is discharged and the filter unit is reset under the action of the reset unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0018] Figure 1 A schematic diagram of the structure of a direct contact boiling heat exchanger proposed by the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the body of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the present invention after the heat-conducting tube is removed;

[0021] Figure 4 It is a structural schematic diagram of the liftable filtering mechanism in the present invention;

[0022] Among them: 1. Main body; 2. Water tank; 3. Air inlet pipe; 5. Connecting pipe; 6. Round pipe; 7. Exhaust pipe; 8. Air outlet; 9. Lower water pipe; 10. Upper water pipe; 11. Solenoid valve; 12. Spiral heat pipe; 13. Heat transfer tube; 16. Annular plugging plate; 17. Piston cylinder; 18. Piston one; 19. Straight pipe; 20. Circulating water pump; 22. Straight rod; 23. Spring; 24. Piston two; 25. Filter element; 27. Hot air exhaust pipe; 28. Exhaust gas exhaust pipe; 29. ​​Exhaust hole; 30. Piston rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Reference Figures 1 to 4 As shown, the present invention provides a direct contact boiling heat exchanger, including a main body 1, a heat conducting tube 13 is connected inside the main body 1, the inner cavity of the main body 1 is divided by the heat conducting tube 13 to form a low-temperature gas buffer cavity and a high-temperature gas buffer cavity, the high-temperature gas buffer cavity is located inside the heat conducting tube 13, and the low-temperature gas buffer cavity is located outside the heat conducting tube 13, an exhaust pipe 7 and an air inlet pipe 3 are provided on the top of the main body 1, an exhaust pipe 28 and a hot gas exhaust pipe 27 are provided on the bottom of the main body 1, the exhaust pipe 7 and the exhaust pipe 28 are both connected to the high-temperature gas buffer cavity, the air inlet pipe 3 and the hot gas exhaust pipe 27 are both connected to the low-temperature gas buffer cavity, a reset unit is slidably connected inside the exhaust pipe 7, a filter unit is provided on the reset unit, a piston push unit is provided below the exhaust pipe 7, the bottom end of the filter unit passes through the bottom end of the exhaust pipe 7 and is transmission-coordinated with the output end of the piston push unit.

[0026] The high-temperature exhaust gas is introduced through the exhaust pipe 7 and filtered through the lifting filter mechanism, and then enters the high-temperature gas buffer chamber separated by the heat-conducting tube 13, and at the same time exchanges heat with the low-temperature gas entering the low-temperature gas buffer chamber in the main body 1 through the air inlet pipe 3. The exhaust gas that completes the heat exchange is discharged through the exhaust pipe 28 for subsequent purification treatment, and the heated low-temperature gas is discharged through the hot gas exhaust pipe 27 for utilization.

[0027] When the filter unit needs to be cleaned, gas only needs to be introduced into the piston push unit, and the output end of the piston push unit will push the filter unit out of the exhaust pipe 7, which is convenient for workers to clean and maintain daily. After the maintenance is completed, the gas in the piston push unit is discharged, and the filter unit is reset under the action of the reset unit.

[0028] The invention has a simple structure and high reliability, is convenient for daily cleaning of the filter, and improves work efficiency.

[0029] Furthermore, the reset unit includes a piston 24 that is slidingly sealed and arranged in the exhaust pipe 7. Both ends of the exhaust pipe 7 are connected with an annular plugging plate 16. A plurality of straight rods 22 are connected between the two annular plugging plates 16. The straight rod 22 passes through the edge of the piston 24, and the piston 24 and the straight rod 22 are slidingly sealed. A spring 23 is provided on the sliding sleeve of the straight rod 22. The top end of the spring 23 abuts against the annular plugging plate 16 located at the top end of the exhaust pipe 7, and the bottom end of the spring 23 abuts against the top surface of the piston 24. The filter unit is arranged on the piston 24.

[0030] The upper and lower annular plugging plates 16 are provided to facilitate the passage of the filter unit on the one hand, and to form a sealed shell with the exhaust pipe 7 on the other hand, so that the high-temperature exhaust gas introduced can be fully filtered through the filter unit. When the piston push unit is depressurized, the spring 23 reacts on the piston 24 and pushes the piston 24 downward until the bottom surface of the piston 24 abuts against the annular plugging plate 16 located below the exhaust pipe 7, completing the reset. The movement path of the piston 24 is controlled by the provided straight rod 22. It should be noted that the piston 24 is made of galvanized iron metal, and an O-ring is sleeved on the edge of the piston 24 to achieve sliding sealing cooperation with the inside of the exhaust pipe 7. When the piston push unit is working, the gas pressure in the exhaust pipe 7 and the compression force of the spring 23 are less than the gas pressure inside the piston push unit.

[0031] Furthermore, the filter unit includes a straight pipe 19, a piston 24 is fixedly sleeved on the straight pipe 19, the top end of the straight pipe 19 is connected to the filter element 25, the bottom end of the straight pipe 19 passes through the annular plugging plate 16 located at the bottom end of the exhaust pipe 7, and the bottom end of the straight pipe 19 is connected to the telescopic end of the piston pushing unit; a plurality of air outlet holes 8 are opened on the outer wall of the straight pipe 19, the air outlet holes 8 are located below the exhaust pipe 7, and the straight pipe 19 is connected to the high-temperature gas buffer chamber through the air outlet holes 8.

[0032] The straight pipe 19 is provided so that the gas filtered by the filter element 25 can flow downward along the inner wall of the straight pipe 19 and enter the high-temperature gas buffer chamber through a plurality of gas outlet holes 8 to filter the high-temperature exhaust gas.

[0033] Furthermore, the piston pushing unit includes a piston cylinder 17, and the exhaust pipe 7 and the main body 1 are coaxially arranged with the piston cylinder 17. A piston rod 30 is slidably connected in the piston cylinder 17, and a piston 18 is fixedly sleeved on the piston rod 30. The piston 18 is slidably sealed with the inner wall of the piston cylinder 17. The top end of the piston rod 30 passes through the inner top wall of the piston cylinder 17 and is connected to the bottom end of the straight tube 19. A plurality of exhaust holes 29 are opened on the top wall of the piston cylinder 17. The bottom end of the piston cylinder 17 is connected to a plurality of connecting pipes 5. The ends of the connecting pipes 5 pass through the bottom wall of the main body 1 and are connected to the low-temperature gas buffer chamber. Solenoid valves are provided on the connecting pipes 5 and the piston 18.

[0034] The electromagnetic valve on the connecting pipe 5 is opened to allow the heated low-temperature gas to enter the piston cylinder 17 and gather in a limited space to increase the pressure in the piston cylinder 17. At this time, the electromagnetic valve on the piston 18 is in a closed state. The piston 18 moves upward along the inner wall of the piston cylinder 17 under the push of the gas and drives the piston rod 30 to overcome the elastic force of the spring 23 and the gas pressure in the exhaust pipe 7 so that the straight pipe 19 drives the filter element 25 to extend out of the exhaust pipe 7, completing the lifting of the filter element 25. When the filter element 25 needs to be lowered, the electromagnetic valve on the piston 18 is opened to release the pressure. The gas in the lower space of the piston 18 instantly passes through the electromagnetic valve on the piston 18 and is discharged from the piston cylinder 17 through the exhaust hole 29. At this time, the spring 23 reacts on the piston 24 and pushes the piston 24 downward until the bottom surface of the piston 24 abuts against the annular plugging plate 16 located below the exhaust pipe 7, and the filter element 25 is retracted into the exhaust pipe 7 to complete the reset. It should be noted that the material and structure of the piston 18 are the same as those of the piston 24.

[0035] Furthermore, the bottom wall of the main body 1 is connected to a plurality of circular tubes 6 , which are connected to the low-temperature gas buffer chamber. The bottom end of the circular tube 6 is connected to an end of the connecting tube 5 away from the piston cylinder 17 , and the solenoid valve is arranged at the connection between the circular tube 6 and the connecting tube 5 .

[0036] Furthermore, a heat-conducting member is sleeved on the piston cylinder 17, and the heat-conducting member is arranged in the heat-conducting cylinder 13. A water storage cavity is arranged in the heat-conducting member, and the water storage cavity is connected to a circulating water component.

[0037] Furthermore, the heat conducting member is a spiral heat pipe 12 .

[0038] Furthermore, the circulating water assembly includes a water tank 2, the top of the water tank 2 is connected to the upper end of the spiral heat pipe 12 through an upper water pipe 10, the bottom of the water tank 2 is connected to the lower end of the spiral heat pipe 12 through a lower water pipe 9, and a circulating water pump 20 is provided on the upper water pipe 10.

[0039] The high-temperature gas entering the heat-conducting tube 13 is heat-conducted by the spiral heat pipe 12 to achieve heat exchange with the water in the spiral heat pipe 12. At the same time, the circulation of the water in the water tank 2 is accelerated by the circulating water pump 20, further improving the heat exchange efficiency, so that the water is heated and utilized.

[0040] Furthermore, in order to control the amount of low-temperature gas introduced and ensure the heat exchange effect, an electromagnetic valve 11 is provided on the air inlet pipe 3 .

[0041] The direct contact boiling heat exchanger provided by the present invention has the following working principle: when in use, high-temperature exhaust gas is introduced into the exhaust pipe 7, the high-temperature exhaust gas is filtered by the filter element 25, and then the gas goes down along the inner wall of the straight pipe 19, and enters the high-temperature gas buffer chamber through a plurality of air outlet holes 8 to filter the high-temperature exhaust gas, and transfers the heat to the spiral heat pipe 12 and the heat-conducting tube 13. At this time, the circulating water pump 20 is started to circulate the water in the water tank 2 in the spiral heat pipe 12 to achieve heat exchange and temperature rise; the solenoid valve 11 is controlled to open the low-temperature gas to enter the high-temperature gas buffer chamber through the air inlet pipe 3, and the low-temperature gas is in direct contact with the heat-conducting tube 13 to achieve heat exchange and heat up the low-temperature gas. When it is necessary to clean the filter element 25, the solenoid valve on the circular tube 6 is opened, and the heated gas is introduced into the piston cylinder 17, and the gas is gathered in a limited space to increase the pressure in the piston cylinder 17. At this time, the solenoid valve on the piston 18 is in a closed state, and the piston 18 is in a closed state. The filter element 25 is then retracted into the exhaust pipe 7 and the exhaust gas is retracted.

[0042] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A direct contact boiling heat exchanger, characterized in that: The invention comprises a body (1), wherein a heat-conducting tube (13) is connected to the body (1), and the inner cavity of the body (1) is divided by the heat-conducting tube (13) to form a low-temperature gas buffer cavity and a high-temperature gas buffer cavity, wherein the high-temperature gas buffer cavity is located inside the heat-conducting tube (13), and the low-temperature gas buffer cavity is located outside the heat-conducting tube (13). An exhaust pipe (7) and an air intake pipe (3) are provided at the top of the body (1), and an exhaust pipe (28) and a hot air pipe (27) are provided at the bottom of the body (1). The exhaust pipe (7) and the exhaust pipe (28) are both in communication with the high-temperature gas buffer cavity, and the air intake pipe (3) and the hot air pipe (27) are both in communication with the low-temperature gas buffer cavity. A reset unit is slidably connected inside the exhaust pipe (7), and a filter unit is provided on the reset unit. A piston push unit is provided below the exhaust pipe (7), and the bottom end of the filter unit passes through the bottom end of the exhaust pipe (7) and is in transmission cooperation with the output end of the piston push unit.

2. The direct contact boiling heat exchanger according to claim 1, characterized in that: The reset unit comprises a second piston (24) which is slidingly and sealably arranged in the exhaust pipe (7), both ends of the exhaust pipe (7) are connected with an annular plugging plate (16), a plurality of straight rods (22) are connected between the two annular plugging plates (16), the straight rods (22) pass through the second piston (24), and the second piston (24) and the straight rods (22) are slidingly and sealably matched, a spring (23) is slidingly sleeved on the straight rod (22), the top end of the spring (23) abuts against the annular plugging plate (16) located at the top end of the exhaust pipe (7), and the bottom end of the spring (23) abuts against the top surface of the second piston (24), and the filter unit is arranged on the second piston (24).

3. The direct contact boiling heat exchanger according to claim 2, characterized in that: The filter unit comprises a straight tube (19), the second piston (24) is fixedly sleeved on the straight tube (19), the top end of the straight tube (19) is connected to a filter element (25), the bottom end of the straight tube (19) passes through the annular plugging plate (16) located at the bottom end of the exhaust pipe (7), and the bottom end of the straight tube (19) is connected to the telescopic end of the piston pushing unit; a plurality of air outlet holes (8) are opened on the outer wall of the straight tube (19), the air outlet holes (8) are located below the exhaust pipe (7), and the straight tube (19) is connected to the high-temperature gas buffer chamber through the air outlet holes (8).

4. The direct contact boiling heat exchanger according to claim 3, characterized in that: The piston pushing unit comprises a piston cylinder (17), the exhaust pipe (7) and the body (1) are coaxially arranged with the piston cylinder (17), a piston rod (30) is slidably connected inside the piston cylinder (17), a piston one (18) is fixedly sleeved on the piston rod (30), the piston one (18) is slidably sealed with the inner wall of the piston cylinder (17), the top end of the piston rod (30) passes through the inner top wall of the piston cylinder (17) and is connected to the bottom end of the straight tube (19), a plurality of exhaust holes (29) are opened on the top wall of the piston cylinder (17), the bottom end of the piston cylinder (17) is connected to a plurality of connecting pipes (5), the ends of the connecting pipes (5) pass through the bottom wall of the body (1) and are connected to the low-temperature gas buffer chamber, and solenoid valves are arranged on the connecting pipes (5) and the piston one (18).

5. The direct contact boiling heat exchanger according to claim 4, characterized in that: The bottom wall of the body (1) is connected to a plurality of circular tubes (6), the circular tubes (6) are connected to the low-temperature gas buffer chamber, the bottom end of the circular tube (6) is connected to an end of the connecting tube (5) away from the piston cylinder (17), and the solenoid valve is arranged at the connection between the circular tube (6) and the connecting tube (5).

6. The direct contact boiling heat exchanger according to claim 5, characterized in that: The piston cylinder (17) is sleeved with a heat-conducting component, which is arranged in the heat-conducting cylinder (13). A water storage cavity is arranged in the heat-conducting component, and the water storage cavity is connected to a circulating water component.

7. The direct contact boiling heat exchanger according to claim 6, characterized in that: The heat conducting element is a spiral heat pipe (12).

8. The direct contact boiling heat exchanger according to claim 7, characterized in that: The circulating water assembly comprises a water tank (2), the top end of the water tank (2) being connected to the upper end of the spiral heat pipe (12) via an upper water pipe (10), the bottom end of the water tank (2) being connected to the lower end of the spiral heat pipe (12) via a lower water pipe (9), and a circulating water pump (20) being provided on the upper water pipe (10).

9. The direct contact boiling heat exchanger according to claim 1, characterized in that: The air intake pipe (3) is provided with an electromagnetic valve (11).

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