Evaporation structure of vertical steam generator

Abstract

The utility model relates to the technical field of steam generators, in particular to an evaporation structure of a vertical steam generator, which comprises an inner evaporation frame, a steam collecting box and two outer evaporation frames, the number of the outer evaporation frames is two, the two outer evaporation frames are respectively and fixedly arranged at the front end and the rear end of the inner evaporation frame, and the outer evaporation frames are communicated with the inner evaporation frame. The evaporation inner frame comprises two energy-saving outer frames located on the outer side and a plurality of energy-saving inner frames arranged between the two energy-saving outer frames. Compared with the prior art, the energy-saving outer frame and the energy-saving inner frame in the evaporation inner frame are utilized, so that a good smoke flow channel can be formed, waste heat of high-temperature smoke generated after combustion can be effectively utilized, the temperature of exhausted smoke is effectively reduced, fuel energy is saved, the evaporation capacity of steam is greatly improved in a limited space, and the energy-saving effect is good. The steam output efficiency is improved, and the problem that the size of the steam generator is too large and too high due to the fact that the height of a traditional vertical steam generator needs to be increased can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam generators, in particular to an evaporation structure of a vertical steam generator. Background Technique

[0002] A steam generator is a heat energy conversion device that heats the water flowing in the pipe into steam and quickly outputs steam externally. As the steam volume increases, its volume and water capacity also need to increase. When the water capacity exceeds 30L, it belongs to the category of boilers, which are special equipment that needs to be included in the national quality and technical supervision and management. Therefore, to ensure the safety of use, its water capacity is generally set within 30L, which results in limited evaporation (steam production) capacity.

[0003] Currently, in the prior art, the utility model person found that there are certain drawbacks in the use of traditional steam generators. For example, traditional heated water pipes are generally only arranged on both sides of the combustion chamber (or combustion cavity), and the heat generated by combustion in the combustion chamber is used to heat the water pipes, while the high-temperature flue gas (or hot gas) generated after heating is discharged. In order to increase the evaporation capacity, it is necessary to increase the length or height of the combustion chamber, resulting in an overly large volume and size. Generally, only a cooling water tank is used to recover heat and cool the excessively high flue gas temperature, but the effect is not good. For this reason, the utility model proposes an evaporation structure of a vertical steam generator. Content of the Utility Model

[0004] The purpose of the utility model is to provide an evaporation structure of a vertical steam generator to solve the problems proposed in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An evaporation structure of a vertical steam generator, including an evaporation inner frame, a steam collecting box, and an evaporation outer frame. The number of evaporation outer frames is two, and the two evaporation outer frames are respectively fixedly installed at the front and rear ends of the evaporation inner frame, and the evaporation outer frame is communicated with the evaporation inner frame. The evaporation inner frame includes two energy-saving outer frames located on the outside and a plurality of energy-saving inner frames arranged between the two energy-saving outer frames. Heat exchange cavities are provided between adjacent energy-saving inner frames and between the energy-saving outer frame and the energy-saving inner frame. A plurality of the heat exchange cavities form a smoke exhaust duct, and the upper end of the smoke exhaust duct is communicated with a smoke pipe. One end of the smoke exhaust duct away from the smoke pipe is communicated with a combustion chamber. The upper ends of the evaporation outer frame and the evaporation inner frame are both connected to the steam collecting box through steam pipes, and an exhaust pipe is installed at the upper end of the steam collecting box.

[0006] As a preferred technical solution of the utility model, the evaporation outer frame includes a plurality of water-cooled pipes, and connecting water pipes are fixedly connected to the top and bottom of the water-cooled pipes. An inlet water pipe is provided on the connecting water pipe located at the bottom.

[0007] As a preferred technical solution of the utility model, the energy-saving outer frame includes a plurality of energy-saving outer tubes, the top and bottom of the energy-saving outer tubes are fixedly connected with connecting outer tubes, and the connecting outer tubes are connected to the connecting water pipes.

[0008] As a preferred technical solution of the utility model, the energy-saving inner frame includes a plurality of energy-saving inner tubes, the top and bottom of the energy-saving inner tubes are fixedly connected with connecting inner tubes, and the connecting inner tubes are connected to the connecting water pipes.

[0009] As a preferred technical solution of the utility model, a first water-cooled outer wall is fixedly installed on the energy-saving outer frame, and the first water-cooled outer wall is arranged on the outer surfaces of multiple energy-saving outer tubes, and a water-cooled inner wall is fixedly installed on each of the energy-saving inner frames, and a smoke outlet is opened on each of the water-cooled inner walls. The multiple smoke outlets are staggered so that the smoke exhaust duct is arranged in a circuitous and return form.

[0010] As a preferred technical solution of the utility model, the outer surface of the connecting water pipe is fixedly connected to a second water-cooled outer wall, a sealing cover is fixedly connected between the two evaporation outer frames, and a pipe hole for accommodating a flue gas pipe is opened on the top of the sealing cover.

[0011] As a preferred technical solution of the utility model, it also includes a heat exchange water tank, which is arranged above the evaporator inner frame and the evaporator outer frame. The flue gas pipe runs through the interior of the heat exchange water tank and extends to the outside of the heat exchange water tank. A return pipe, an overflow pipe and a water filling pipe are installed on the heat exchange water tank. The return pipe is connected to the water inlet pipe through a water supply pipe.

[0012] As a preferred technical solution of the utility model, a combustion base is fixedly installed at the bottom of the evaporation inner frame and the evaporation outer frame, and the combustion chamber is arranged inside the combustion base.

[0013] As a preferred technical solution of the utility model, it also includes a liquid level gauge, the upper end of the liquid level gauge is connected to the bottom of the steam collecting box, and the lower end of the liquid level gauge is connected to the bottom of the evaporation outer frame.

[0014] As a preferred technical solution of the utility model, a safety valve connecting pipe and a pressure controller connecting pipe are also installed on the steam collecting box, and a downwardly inclined downpipe is fixedly installed at the lower end of the steam collecting box, and the lower end of the downpipe is connected to the bottom of the evaporation outer frame.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The evaporation structure of a vertical steam generator of the present utility model can heat the water inside by setting an inner evaporation frame and an outer evaporation frame. The heated water can form steam and be collected into a steam collecting box, and finally discharged through an exhaust pipe. By using the energy-saving outer frame and energy-saving inner frame inside the inner evaporation frame, a good flue gas passage can be formed, so that the waste heat of the high-temperature flue gas generated after combustion can be effectively utilized. This not only effectively reduces the temperature of the discharged flue gas, saves fuel energy, but also greatly improves the evaporation amount of steam within a limited space, enhances the steam production efficiency, and at the same time can solve the problem that the traditional vertical steam generator needs to increase its height, resulting in an overly large and high volume of the steam generator.

[0017] Other features and advantages of the present utility model will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic cross-sectional structure diagram at the outer evaporation frame of the present utility model;

[0020] Figure 3 is a schematic structure diagram of the energy-saving inner frame of the present utility model;

[0021] Figure 4 is a schematic structure diagram of the energy-saving outer frame of the present utility model;

[0022] Figure 5 is a schematic structure diagram of the sealing cover of the present utility model;

[0023] In the figure: 1. Inner evaporation frame; 11. Energy-saving outer frame; 111. Connecting outer pipe; 112. Energy-saving outer pipe; 113. First water-cooled outer wall; 12. Energy-saving inner frame; 121. Connecting inner pipe; 122. Energy-saving inner pipe; 123. Water-cooled inner wall; 124. Flue gas port; 2. Outer evaporation frame; 21. Connecting water pipe; 22. Water-cooled pipe; 23. Second water-cooled outer wall; 24. Water inlet pipe; 3. Steam collecting box; 31. Steam pipe; 32. Exhaust pipe; 33. Safety valve connecting pipe; 34. Pressure controller connecting pipe; 35. Downcomer; 4. Heat exchange water tank; 41. Flue gas pipe; 42. Return water pipe; 43. Overflow pipe; 44. Water adding pipe; 5. Liquid level gauge; 6. Combustion base; 60. Smoke exhaust duct; 61. Combustion chamber; 62. Heat exchange chamber; 7. Sealing cover; 70. Pipe hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0026] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Please refer to Figures 1-5, in this embodiment, an evaporation structure of a vertical steam generator is provided, which includes an evaporation inner frame 1, a steam collecting box 3, and two evaporation outer frames 2. The two evaporation outer frames 2 are respectively fixedly installed at the front and rear ends of the evaporation inner frame 1, and the evaporation outer frame 2 is communicated with the evaporation inner frame 1. The evaporation inner frame 1 includes two energy-saving outer frames 11 on the outside and a plurality of energy-saving inner frames 12 arranged between the two energy-saving outer frames 11. Heat exchange chambers 62 are provided between adjacent energy-saving inner frames 12 and between the energy-saving outer frame 11 and the energy-saving inner frame 12. The plurality of heat exchange chambers 62 form a smoke exhaust duct 60, and a smoke pipe 41 is connected to the upper end of the smoke exhaust duct 60. One end of the smoke exhaust duct 60 away from the smoke pipe 41 is communicated with a combustion chamber 61. The upper ends of the evaporation outer frame 2 and the evaporation inner frame 1 are both connected to the steam collecting box 3 through a steam pipe 31. An exhaust pipe 32 is installed at the upper end of the steam collecting box 3. The evaporation outer frame 2 includes a plurality of water-cooling pipes 22. Connecting water pipes 21 are fixedly connected to the top and bottom of the water-cooling pipes 22. A water inlet pipe 24 is provided on the connecting water pipe 21 at the bottom. The energy-saving outer frame 11 includes a plurality of energy-saving outer pipes 112. Connecting outer pipes 111 are fixedly connected to the top and bottom of the energy-saving outer pipes 112, and the connecting outer pipes 111 are communicated with the connecting water pipes 21. The energy-saving inner frame 12 includes a plurality of energy-saving inner pipes 122. Connecting inner pipes 121 are fixedly connected to the top and bottom of the energy-saving inner pipes 122, and the connecting inner pipes 121 are communicated with the connecting water pipes 21. A first water-cooling outer wall 113 is fixedly installed on the energy-saving outer frame 11, and the first water-cooling outer wall 113 is arranged on the outer surface of the plurality of energy-saving outer pipes 112. A water-cooling inner wall 123 is fixedly installed on each energy-saving inner frame 12. A smoke port 124 is opened on each water-cooling inner wall 123. The plurality of smoke ports 124 are arranged in a staggered manner, so that the smoke exhaust duct 60 is arranged in a circuitous and folded shape. A combustion base 6 is fixedly installed at the bottom of the evaporation inner frame 1 and the evaporation outer frame 2, and the combustion chamber 61 is arranged inside the combustion base 6. By providing the evaporation inner frame 1 and the evaporation outer frame 2, the water inside can be heated by combustion. The heated water can form steam and be collected into the steam collecting box 3, and finally discharged through the exhaust pipe. By using the energy-saving outer frame 11 and the energy-saving inner frame 12 in the evaporation inner frame 1, a good smoke flow path can be formed, so that the waste heat of the high-temperature flue gas generated after combustion can be effectively utilized. Not only the temperature of the discharged flue gas is effectively reduced, fuel energy is saved, but also the evaporation amount of steam can be greatly increased in a limited space, the steam output efficiency is improved, and at the same time, the problem that the traditional vertical steam generator needs to increase the height, resulting in the steam generator being too large and too high, can be solved.

[0028] When water is introduced into the evaporation outer frame 2 through the water inlet pipe 24, the water will quickly enter the connecting water pipe 21 and the water cooling pipe 22, and at the same time enter the energy-saving outer frame 11 and the energy-saving inner frame 12 of the evaporation inner frame 1. Igniting the fuel in the combustion chamber 61 of the combustion base 6 can heat the water in the energy-saving outer pipe 112 and the energy-saving inner pipe 122, as well as heat the water cooling pipe 22 in the area near the combustion chamber 61. The evaporated water vapor is collected into the steam collecting box 3 through the steam pipe 31 and finally discharged through the exhaust pipe 32. And the high-temperature flue gas generated after heating will enter the heat exchange chamber 62 on the side close to the combustion chamber 61 through the flue gas port 124 on the energy-saving inner frame 12, so that the high-temperature flue gas can exchange heat well with the surrounding energy-saving inner pipe 122 and the water cooling pipe 22, so that the water inside can also be well evaporated. This not only effectively reduces the temperature of the discharged flue gas, saves fuel energy, but also greatly improves the evaporation amount of steam in a limited space, improves the steam production efficiency, and finally the cooled high-temperature flue gas enters the heat exchange water tank 4 through the flue gas pipe 41.

[0029] In this embodiment, it further includes a heat exchange water tank 4. The heat exchange water tank 4 is arranged above the evaporation inner frame 1 and the evaporation outer frame 2. The flue gas pipe 41 penetrates through the inside of the heat exchange water tank 4 and extends to the outside of the heat exchange water tank 4. A return water pipe 42, an overflow pipe 43 and a water filling pipe 44 are installed on the heat exchange water tank 4. The return water pipe 42 is connected to the water inlet pipe 24 through a water supply pipeline. When the high-temperature flue gas enters the heat exchange water tank 4, it can exchange heat further with the cold water in the heat exchange water tank 4, so as to further reduce the temperature of the flue gas, and can preheat the water in the heat exchange water tank 4 well, effectively reducing the heat required for evaporation work and improving its energy-saving and evaporation effects.

[0030] In this embodiment, a second water cooling outer wall 23 is fixedly connected to the outer surface of the connecting water pipe 21. A sealing cover 7 is fixedly connected between the two evaporation outer frames 2, and a pipe hole 70 for accommodating the flue gas pipe 41 is opened at the top of the sealing cover 7. By using the sealing cover 7, the heat inside the steam generator can be sealed.

[0031] In this embodiment, it further includes a liquid level gauge 5. The upper end of the liquid level gauge 5 is communicated with the bottom of the steam collecting box 3, and the lower end of the liquid level gauge 5 is communicated with the bottom of the evaporation outer frame 2. Through the liquid level gauge 5, the water level in the energy-saving outer pipe 112, the energy-saving inner pipe 122 and the water cooling pipe 22 can be monitored in real time, so as to realize timely water replenishment.

[0032] In this embodiment, a safety valve connecting pipe 33 and a pressure controller connecting pipe 34 are further installed on the steam collecting box 3. A downcomer 35 arranged obliquely downward is fixedly installed at the lower end of the steam collecting box 3, and the lower end of the downcomer 35 is communicated with the bottom of the evaporation outer frame 2. Among them, the safety valve connecting pipe 33 is used for installing the safety valve, and the pressure controller connecting pipe 34 is used for installing the pressure controller. The pressure in the water-vapor space of the steam generator can be well controlled and regulated by using the safety valve and the pressure controller. By using the downcomer 34, the water generated during condensation can flow back into the evaporation outer frame 2.

[0033] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The evaporation structure of a vertical steam generator, characterized in that, The invention comprises an evaporation inner frame (1), a steam collecting box (3) and an evaporation outer frame (2), wherein the number of the evaporation outer frames (2) is two, the two evaporation outer frames (2) are respectively fixedly mounted at the front and rear ends of the evaporation inner frame (1), and the evaporation outer frame (2) is connected to the evaporation inner frame (1), and the evaporation inner frame (1) comprises two energy-saving outer frames (11) located at the outside and a plurality of energy-saving inner frames (12) arranged between the two energy-saving outer frames (11), and the energy-saving inner frames (12) are arranged between adjacent energy-saving inner frames (12) and between adjacent energy-saving outer frames (11). A heat exchange chamber (62) is provided between the frame (11) and the energy-saving inner frame (12); a plurality of the heat exchange chambers (62) form a smoke exhaust duct (60); and the upper end of the smoke exhaust duct (60) is connected to a smoke pipe (41); the end of the smoke exhaust duct (60) away from the smoke pipe (41) is connected to a combustion chamber (61); the upper ends of the evaporation outer frame (2) and the evaporation inner frame (1) are connected to the steam collecting box (3) through a steam pipe (31); and the upper end of the steam collecting box (3) is installed with a steam exhaust pipe (32).

2. The evaporation structure of a vertical steam generator according to claim 1, characterized in that, The evaporation outer frame (2) comprises a plurality of water cooling pipes (22), the top and bottom of each of the water cooling pipes (22) are fixedly connected to a connecting water pipe (21), and a water inlet pipe (24) is provided on the connecting water pipe (21) at the bottom.

3. The evaporation structure of a vertical steam generator according to claim 2, characterized in that, The energy-saving outer frame (11) comprises a plurality of energy-saving outer tubes (112), the top and bottom of each of the energy-saving outer tubes (112) are fixedly connected to a connecting outer tube (111), and the connecting outer tube (111) is in communication with a connecting water pipe (21).

4. The evaporation structure of a vertical steam generator according to claim 3, characterized in that, The energy-saving inner frame (12) comprises a plurality of energy-saving inner tubes (122), the top and bottom of each of the energy-saving inner tubes (122) are fixedly connected to a connecting inner tube (121), and the connecting inner tube (121) is in communication with a connecting water pipe (21).

5. The evaporation structure of a vertical steam generator according to claim 4, characterized in that, A first water-cooled outer wall (113) is fixedly mounted on the energy-saving outer frame (11), and the first water-cooled outer wall (113) is arranged on the outer surfaces of a plurality of energy-saving outer tubes (112). A water-cooled inner wall (123) is fixedly mounted on each of the energy-saving inner frames (12), and a smoke outlet (124) is provided on each of the water-cooled inner walls (123). The plurality of smoke outlets (124) are arranged in a staggered manner, so that the smoke exhaust duct (60) is arranged in a circuitous and return form.

6. The evaporation structure of a vertical steam generator according to claim 2, characterized in that, The outer surface of the connecting water pipe (21) is fixedly connected to a second water-cooled outer wall (23), a sealing cover (7) is fixedly connected between the two evaporation outer frames (2), and a pipe hole (70) for accommodating a smoke pipe (41) is provided at the top of the sealing cover (7).

7. The evaporation structure of a vertical steam generator according to claim 2, wherein, The invention also comprises a heat exchange water tank (4), wherein the heat exchange water tank (4) is arranged above the evaporation inner frame (1) and the evaporation outer frame (2), wherein the flue gas pipe (41) passes through the interior of the heat exchange water tank (4) and extends to the exterior of the heat exchange water tank (4), and a return water pipe (42), an overflow pipe (43) and a water supply pipe (44) are installed on the heat exchange water tank (4), and the return water pipe (42) is connected to the water inlet pipe (24) through a water supply pipe.

8. The evaporation structure of a vertical steam generator according to claim 1, characterized in that, The bottom of the inner evaporation rack (1) and the outer evaporation rack (2) is fixedly installed with a combustion base (6), and a combustion chamber (61) is arranged inside the combustion base (6).

9. The evaporation structure of a vertical steam generator according to claim 1, characterized in that, It further includes a liquid level gauge (5). The upper end of the liquid level gauge (5) is communicated with the bottom of the steam collecting box (3), and the lower end of the liquid level gauge (5) is communicated with the bottom of the outer evaporation rack (2).

10. The evaporation structure of a vertical steam generator according to claim 1, characterized in that, The steam collecting box (3) is further installed with a safety valve connecting pipe (33) and a pressure controller connecting pipe (34). The lower end of the steam collecting box (3) is fixedly installed with a downwards inclined drain pipe (35), and the lower end of the drain pipe (35) is communicated with the bottom of the outer evaporation rack (2).

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