A gas-fired high-efficiency steam generator

Abstract

The present invention relates to the technical field of steam generators, and specifically to a gas-fired high-efficiency steam generator, comprising: a furnace body, which comprises a furnace, a first reheat box, a second reheat box and a water tank, wherein the first reheat box is fixed on one side of the furnace, the second reheat box is fixed on the other side of the furnace, the water tank is fixed on the upper end of the second reheat box, and a bracket is provided on the lower surface of the furnace; a burner connecting pipe, which passes through the second reheat box and extends into the furnace, and is provided with a flame nozzle inside the furnace; wherein the furnace comprises a plurality of water pipes, adjacent water pipes are fixed to each other by external heat conducting plates, and an internal heat conducting plate is provided on one side of the external heat conducting plate; compared with the prior art, the present invention can increase the channel length of the space for recycling waste heat after combustion, so that the heat after combustion can be fully utilized, the time for subsequent steam production can be shortened, and the steam production per unit time can be increased.

Description

Technical Field

[0001] The invention relates to the technical field of steam generators, in particular to a gas-fired high-efficiency steam generator. Background Art

[0002] A steam generator is a heat energy conversion device that heats the water flowing in the pipe into steam and quickly outputs the steam to the outside. As the amount of steam increases, its volume and water capacity also need to increase. Therefore, in order to ensure the safety of use, its water capacity is generally set within 30L, which leads to a limit on its evaporation capacity (steam production).

[0003] In the prior art, in order to better improve the steam production efficiency of the steam generator, the Chinese patent with publication number CN110410766A discloses a new type of combined energy-saving steam generator below 30L, including a furnace body, a chimney is provided on the top of the furnace body, a furnace leg is connected to the bottom of the furnace body, the furnace body includes an outer protective shell and an inner stainless steel protective shell, a fixing frame is connected inside the inner stainless steel protective shell, 304 stainless steel fin copper coil and 304 stainless steel coil are installed on the fixing frame from top to bottom, the 304 stainless steel fin copper coil and the 304 stainless steel coil are connected by a stainless steel ferrule joint, and a gas fire grate is connected to the bottom of the inner stainless steel protective shell. Compared with the prior art, the advantages of the present invention are energy saving and environmental protection, fast conversion speed, high steam pressure and high temperature after conversion.

[0004] However, the inventors have found that the above patent still has certain drawbacks in actual use. For example, it utilizes 304 stainless steel fin copper coils to add in the path of rising heat to achieve waste heat recycling. However, the rising path is too short, resulting in a short contact time between the rising heat and the 304 stainless steel fin copper coils, poor heat exchange effect, and thus unsatisfactory waste heat utilization effect. Therefore, the present invention proposes a gas-fired high-efficiency steam generator that can solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a gas-fired high-efficiency steam generator to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a gas-fired high-efficiency steam generator, comprising:

[0007] A furnace body, comprising a furnace, a first reheat box, a second reheat box and a water tank, wherein the first reheat box is fixed to one side of the furnace, the second reheat box is fixed to the other side of the furnace, the water tank is fixed to the upper end of the second reheat box, and a bracket is provided on the lower surface of the furnace;

[0008] A burner connecting pipe, which passes through the second reheat box and extends into the furnace, and is provided with a flame-spraying port inside the furnace;

[0009] Among them, the furnace includes a plurality of water pipes, adjacent water pipes are fixed by external heat conducting plates, and an internal heat conducting plate is provided on one side of the external heat conducting plate, the internal heat conducting plate is fixedly connected to the water pipe, a first water containing cavity is provided between the external heat conducting plate and the internal heat conducting plate, a fire pipe is provided inside each of the water pipes, a second water containing cavity is provided between the fire pipe and the water pipe, and the first water containing cavity is connected to the second water containing cavity by a water through hole, and a heat return channel is provided inside the fire pipe.

[0010] As a preferred technical solution of the present invention, a burner is fixedly installed on one end of the burner connecting pipe.

[0011] As a preferred technical solution of the present invention, both ends between the fire tube and the water tube are provided with seals, and the seals are in the shape of a circular ring structure, and the sum of the capacities of the second water chamber and the first water chamber is less than 30L.

[0012] As a preferred technical solution of the present invention, an exhaust pipe is installed on the top inner wall of the second heat recovery box, and the exhaust pipe is connected to the heat recovery channel in the fire tube through the second heat recovery box, and the upper end of the exhaust pipe passes through a side wall of the water tank.

[0013] As a preferred technical solution of the present invention, a steam drum is fixedly mounted on the upper end of the furnace through a steam pipe, and a steam pipe and a safety valve are provided on the upper end of the steam drum.

[0014] As a preferred technical solution of the present invention, a base is provided on the lower surface of the furnace body, an outer box is provided on the upper surface of the base, and the furnace body is arranged inside the outer box.

[0015] As a preferred technical solution of the present invention, a water level gauge is provided outside the outer box, and the water level gauge is connected to the furnace and the steam drum.

[0016] As a preferred technical solution of the present invention, a sewage pipe and a water inlet pipe are provided at the bottom of the furnace, and a water inlet and a sewage outlet are provided on one side of the outside of the furnace, the sewage pipe is connected to the sewage outlet, the water inlet pipe is connected to the water inlet, and a cold water inlet pipe and a cold water outlet pipe are provided on one side of the water tank, and the cold water outlet pipe is connected to the water inlet through a connecting water pipe.

[0017] As a preferred technical solution of the present invention, the cross-section of the furnace is an arc-shaped structure, and a plurality of the water pipes are evenly distributed on the furnace at equal distances.

[0018] As a preferred technical solution of the present invention, the cross-sectional shape of the furnace is an inverted "V"-shaped structure, and a plurality of the water pipes are distributed on the furnace in a dense upper and sparse lower structure. A lifting plate is provided at the bottom of the furnace, and the lower end of the lifting plate is fixed on a bracket.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] A gas-fired high-efficiency steam generator of the present invention can increase the channel length of the space for recycling waste heat after combustion by providing a furnace with an inner heat conducting plate, an outer heat conducting plate, a first water chamber, a fire tube, a second water chamber, a water through hole, and a heat recovery channel, so that the heat after combustion can be fully utilized, and by providing a second heat recovery box and an exhaust pipe on the water tank, the effect of recycling the waste heat of hot gas can be further improved, and the water in the water tank before heating can be preheated in advance, thereby shortening the time for subsequent steam production and increasing the steam production per unit time.

[0021] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the furnace body of the present invention;

[0023] Figure 2 A schematic diagram of the structure of a furnace body from another perspective of the present invention;

[0024] Figure 3 is a cross-sectional view of the present invention;

[0025] Figure 4 It is a partial structural schematic diagram of the furnace of the present invention;

[0026] Figure 5 It is a schematic diagram of the connection structure of the second regenerator, the water tank and the burner connecting pipe of the present invention;

[0027] Figure 6 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 7 It is a front view of the furnace of the first embodiment of the present invention;

[0029] Figure 8 It is a front view of the furnace of the second embodiment of the present invention;

[0030] In the figure: 1. furnace body; 2. furnace; 3. first reheat box; 4. second reheat box; 5. water tank; 6. steam drum; 7. burner connecting pipe; 8. steam pipe; 9. bracket; 10. water pipe; 11. inner heat conducting plate; 12. outer heat conducting plate; 13. first water chamber; 14. fire pipe; 15. second water chamber; 16. water hole; 17. heat return channel; 18. exhaust pipe; 19. flame nozzle; 20. base; 21. outer box; 22. insulation layer; 23. steam pipe; 24. safety valve; 25. cold water inlet pipe; 26. cold water outlet pipe; 27. water inlet; 28. sewage outlet; 29. ​​sewage pipe; 30. water inlet pipe; 31. water level gauge; 32 lifting plate. DETAILED DESCRIPTION

[0031] 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.

[0032] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiment 1:

[0035] See also Figure 1-7 The present invention provides a technical solution: a gas-fired high-efficiency steam generator, comprising:

[0036] The furnace body 1 includes a furnace 2, a first reheat box 3, a second reheat box 4 and a water tank 5. The first reheat box 3 is fixed to one side of the furnace 2, the second reheat box 4 is fixed to the other side of the furnace 2, the water tank 5 is fixed to the upper end of the second reheat box 4, and a bracket 9 is provided on the lower surface of the furnace 2;

[0037] The burner connecting pipe 7 passes through the second regenerator box 4 and extends into the furnace 2. A flame injection port 19 is provided inside the furnace 2.

[0038] Among them, the furnace 2 includes a plurality of water pipes 10, and adjacent water pipes 10 are fixed by external heat conducting plates 12, and an internal heat conducting plate 11 is provided on one side of the external heat conducting plate 12, and the internal heat conducting plate 11 is fixedly connected to the water pipe 10, and a first water containing cavity 13 is provided between the external heat conducting plate 12 and the internal heat conducting plate 11, and a fire tube 14 is provided inside each water pipe 10, and a second water containing cavity 15 is provided between the fire tube 14 and the water pipe 10, and the first water containing cavity 13 and the second water containing cavity 15 are connected by a water hole 16, and a heat return channel 17 is provided inside the fire tube 14, and a burner is fixedly installed at one end of the burner connecting pipe 7, and the burner is installed on the burner connecting pipe 7. When the burner is turned on, a high-temperature flame can appear at the flame outlet 19, so as to heat the furnace 2.

[0039] In the present invention, both ends between the fire tube 14 and the water tube 10 are provided with seals, and the seals are in a circular ring structure, so that the fire tube 14 and the water tube 10 are not connected, thereby preventing hot air and water from interfering with each other.

[0040] In the present invention, the sum of the capacities of the second water holding chamber 15 and the first water holding chamber 13 is less than 30L.

[0041] In the present invention, an exhaust pipe 18 is installed on the top inner wall of the second reheat box 4 , and the exhaust pipe 18 communicates with the heat recovery channel 17 in the fire tube 14 through the second reheat box 4 , and the upper end of the exhaust pipe 18 passes through a side wall of the water tank 5 .

[0042] In the present invention, a steam drum 6 is fixedly installed at the upper end of the furnace 2 through a steam pipe 8, a steam pipe 23 and a safety valve 24 are provided at the upper end of the steam drum 6, and an insulation layer 22 is provided on the outer surface of the furnace 2. The insulation layer 22 can effectively prevent the heat of the furnace 2 from overflowing, thereby achieving a good energy-saving effect.

[0043] In the present invention, a base 20 is provided on the lower surface of the furnace body 1 , an outer box 21 is provided on the upper surface of the base 20 , and the furnace body 1 is disposed inside the outer box 21 .

[0044] In the present invention, a water level gauge 31 is provided outside the outer box 21, and the water level gauge 31 is connected to the furnace 2 and the steam drum 6. The water level condition inside the steam generator can be monitored by the water level gauge 31.

[0045] In the present invention, a sewage pipe 29 and a water inlet pipe 30 are provided at the bottom of the furnace 2, and a water inlet 27 and a sewage outlet 28 are provided on one side of the outside of the furnace 2, the sewage pipe 29 is connected to the sewage outlet 28, the water inlet pipe 30 is connected to the water inlet 27, a cold water inlet pipe 25 and a cold water outlet pipe 26 are provided on one side of the water tank 5, and the cold water outlet pipe 26 is connected to the water inlet 27 through a connecting water pipe. By using the sewage pipe 29 and the sewage outlet 28, the sewage remaining in the furnace 2 for a long time can be discharged when not in use, and the water in the water tank 5 can be transported to the furnace 2 through the water inlet pipe 30 and the water inlet 27.

[0046] The present invention, when in use, installs the burner on the burner connecting pipe 7, turns on the burner, and a high-temperature flame appears at the fire port 19, which can heat the water in the first water chamber 13 and the second water chamber 15 in the furnace 2. The hot gas after combustion enters the first reheat box 3 and enters the fire tube 14 through the port of the fire tube 14. The high-temperature hot gas flowing in the fire tube 14 can heat the water in the second water chamber 15 in the water pipe 10. The relatively long and multiple evenly distributed fire tubes 14 can respectively perform good heating treatment on each second water chamber 15, thereby greatly improving the effect of hot gas waste heat reuse and greatly improving the steam production of the steam generator. Then the hot gas enters the second reheat box 4 again, and can heat the bottom of the upper water tank 5. Then, when the hot gas is discharged through the exhaust pipe 18, it will also pass through the inside of the water tank 5, and can further heat the water in the water tank 5, thereby achieving the purpose of preheating the water in advance, effectively shortening the time required for subsequent heating of the water, thereby increasing the steam production per unit time of the steam generator.

[0047] In this embodiment, the cross-sectional shape of the furnace 2 is an arc-shaped structure, and a plurality of water pipes 10 are evenly distributed on the furnace 2 at equal distances, so that the high-temperature hot gas can be fully reused, thereby increasing the steam production of the steam generator per unit time.

[0048] Embodiment 2:

[0049] See also Figure 1-6 and Figure 8 The present invention provides a technical solution: on the basis of embodiment 1, the shape of the furnace 2 in the original embodiment 1 is changed, specifically: the cross-sectional shape of the furnace 2 is an inverted "V"-shaped structure, a plurality of water pipes 10 are distributed on the furnace 2 in a dense upper and sparse lower structure, a lifting plate 32 is provided at the bottom of the furnace 2, and the lower end of the lifting plate 32 is fixed on the bracket 9.

[0050] In this embodiment, the cross-sectional shape of the furnace 2 is an inverted "V"-shaped structure, so that the distance between the furnace 2 and the burning flame below can be set more reasonably, and a plurality of water pipes 10 are distributed on the furnace 2 in a dense upper and sparse lower structure. A lifting plate 32 is provided at the bottom of the furnace 2, and the lower end of the lifting plate 32 is fixed on the bracket 9. More water pipes 10 are provided in the upper high-temperature area, so that the heat in the upper higher temperature area can be well absorbed, and the heat in the lower lower temperature area is absorbed by the water pipes containing less water, thereby achieving a reasonable distribution of heat conduction, further enhancing the evaporation effect of water, and increasing the steam production of the steam generator per unit time. Through the setting of the lifting plate 32, it is also possible to prevent the water pipes 10 in the upper area from being too low and causing a dangerous situation of being burned through, and the use safety is high.

[0051] It is worth noting that the entire device is controlled by a main control button. Since the device matched with the control button is a common device and belongs to the existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas-fired high-efficiency steam generator, characterized in that: include: A furnace body (1), comprising a furnace (2), a first reheat box (3), a second reheat box (4) and a water tank (5), wherein the first reheat box (3) is fixed to one side of the furnace (2), the second reheat box (4) is fixed to the other side of the furnace (2), the water tank (5) is fixed to the upper end of the second reheat box (4), and a bracket (9) is provided on the lower surface of the furnace (2); A burner connecting pipe (7), which passes through the second reheat box (4) and extends into the furnace (2), and is provided with a flame injection port (19) inside the furnace (2); The furnace (2) comprises a plurality of water pipes (10), adjacent water pipes (10) are fixed to each other via external heat conducting plates (12), an internal heat conducting plate (11) is provided on one side of the external heat conducting plate (12), the internal heat conducting plate (11) is fixedly connected to the water pipe (10), a first water containing cavity (13) is provided between the external heat conducting plate (12) and the internal heat conducting plate (11), each water pipe (10) is provided with a fire pipe (14) inside, a second water containing cavity (15) is provided between the fire pipe (14) and the water pipe (10), the first water containing cavity (13) and the second water containing cavity (15) are connected via a water through hole (16), and a heat return channel (17) is provided inside the fire pipe (14); A burner is fixedly mounted on one end of the burner connecting pipe (7); An exhaust pipe (18) is installed on the top inner wall of the second reheat box (4), and the exhaust pipe (18) is connected to the reheat channel (17) in the fire tube (14) through the second reheat box (4), and the upper end of the exhaust pipe (18) passes through a side wall of the water tank (5); The cross-sectional shape of the furnace (2) is an arc-shaped structure, and the plurality of water pipes (10) are evenly and equidistantly distributed on the furnace (2); or the cross-sectional shape of the furnace (2) is an inverted "V"-shaped structure, and the plurality of water pipes (10) are distributed on the furnace (2) in a dense upper and sparse lower structure, and a lifting plate (32) is provided at the bottom of the furnace (2), and the lower end of the lifting plate (32) is fixed to the bracket (9).

2. A gas-fired high-efficiency steam generator according to claim 1, characterized in that: Both ends between the fire tube (14) and the water tube (10) are provided with seals, and the seals are in the shape of a circular ring structure, and the sum of the capacities of the second water containing chamber (15) and the first water containing chamber (13) is less than 30L.

3. A gas-fired high-efficiency steam generator according to claim 1, characterized in that: A steam drum (6) is fixedly mounted on the upper end of the furnace (2) via a steam pipe (8), and a steam pipe (23) and a safety valve (24) are provided on the upper end of the steam drum (6).

4. A gas-fired high-efficiency steam generator according to claim 3, characterized in that: A base (20) is provided on the lower surface of the furnace body (1), an outer box (21) is provided on the upper surface of the base (20), and the furnace body (1) is arranged inside the outer box (21).

5. A gas-fired high-efficiency steam generator according to claim 4, characterized in that: A water level gauge (31) is provided outside the outer box (21), and the water level gauge (31) is connected to the furnace (2) and the steam drum (6).

6. A gas-fired high-efficiency steam generator according to claim 1, characterized in that: A sewage discharge pipe (29) and a water inlet pipe (30) are provided at the bottom of the furnace (2), and a water inlet (27) and a sewage discharge port (28) are provided on one side of the outside of the furnace (2), the sewage discharge pipe (29) is connected to the sewage discharge port (28), the water inlet pipe (30) is connected to the water inlet (27), and a cold water inlet pipe (25) and a cold water outlet pipe (26) are provided on one side of the water tank (5), and the cold water outlet pipe (26) is connected to the water inlet (27) via a connecting water pipe.

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