CN113375141A

CN113375141A - Energy-efficient steam boiler

Info

Publication number: CN113375141A
Application number: CN202110765398.8A
Authority: CN
Inventors: 文昌龙; 吕建波
Original assignee: Sichuan Zhuoyi Environmental Protection And Energy Saving Equipment Co ltd
Current assignee: Sichuan Zhuoyi Environmental Protection And Energy Saving Equipment Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2021-09-10

Abstract

The invention discloses an efficient energy-saving steam boiler which comprises an inner heating chamber and an annular outer heating chamber positioned outside the inner heating chamber, wherein a burner is arranged in the inner heating chamber, inner spiral tubes are arranged outside the burner, a plurality of groups of outer spiral tubes distributed in an annular array are arranged in the outer heating chamber, an upper water chamber is arranged above the outer heating chamber, a lower water chamber is arranged below the outer heating chamber, a heat insulation disc is arranged at the bottom of the inner heating chamber, the inner heating chamber is communicated with the inner space of the outer heating chamber, the outer heating chamber is communicated with the outer space, the inner spiral tubes are in a double-spiral shape, the outer spiral tubes are in a single-spiral shape, a plurality of annular sheets distributed at equal intervals are sleeved on the tubular parts of the inner spiral tubes and the outer spiral tubes, and the inner heating chamber is the inner space of a combustion furnace. This energy-efficient steam boiler can reduce the energy loss that the boiler heat radiation caused, is fit for generally using widely.

Description

Energy-efficient steam boiler

Technical Field

The invention belongs to the technical field of steam boilers, and particularly relates to an efficient and energy-saving steam boiler.

Background

The steam boiler refers to a boiler device for producing steam, and the steam boiler can be divided into an electric steam boiler, an oil steam boiler, a gas steam boiler and the like according to fuel, can be divided into a manual combustion steam boiler and a full-automatic chain combustion steam boiler according to a fuel supply mode, and can be divided into a vertical steam boiler and a horizontal steam boiler according to the structure, wherein the small steam boiler is mainly of a single-return-stroke and double-return-stroke vertical structure, and the large steam boiler is mainly of a three-return-stroke horizontal structure.

The hearth of the existing boiler industry adopts heat insulation materials to carry out heat insulation treatment on the hearth so as to reduce the heat loss in the fuel combustion process, thereby achieving the purpose of improving the overall heat efficiency of the boiler, the lower the heat insulation coefficient of the heat insulation materials is, the higher the material cost is, even if the heat insulation materials with higher cost performance are adopted, the heat loss exists, the outer surface of the heat insulation layer after heat insulation usually maintains the high temperature of more than 100 ℃, in addition, the construction process is complex, and the complete sealing of high-temperature smoke is difficult to realize, therefore, in the existing market, certain air leakage coefficient exists, the heat loss is inevitable, and the smoke after the hearth of the traveling boiler is subjected to convection heat exchange is discharged into the air at the high temperature of not less than 250 ℃, so that the great heat loss is caused; in the face of heat loss of flue gas, a part of products are separately provided with a tube type heat exchanger at a flue gas discharge port, waste heat recovery is carried out, the temperature discharged into the atmosphere is greatly reduced, and the exhaust gas of the existing boiler adopting the waste heat recovery technology is above 150 ℃.

Disclosure of Invention

The present invention is directed to a high-efficiency and energy-saving steam boiler, which solves the above problems of the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an energy-efficient steam boiler, includes interior heating chamber and the annular outer heating chamber that is located its outside, the inside built-in combustor of interior heating chamber, the combustor outside is equipped with interior screwed pipe, the inside outer screwed pipe of a plurality of groups that is equipped with annular array and distributes of outer heating chamber, outer heating chamber top is equipped with the hydroecium, outer heating chamber below is equipped with down the hydroecium, the interior heating chamber bottom is provided with thermal-insulated disc, the inner space intercommunication of interior heating chamber and outer heating chamber, outer heating chamber and outer space intercommunication, the profile of interior screwed pipe is two heliciform, the profile of outer screwed pipe is single spiral, all overlap on the tubulose part of interior screwed pipe and outer screwed pipe and be equipped with the annular piece that a plurality of equidistance distribute.

Preferably, the inner heating chamber is an inner space of the combustion furnace, the outline of the combustion furnace is in a circular cup shape, an inner air port is formed in the outer circle of the lower side of the combustion furnace, a flange with a threaded hole is arranged at the upper edge of the combustion furnace, two annular plates are sleeved on the outer circle of the lower side of the combustion furnace and are welded and fixed on the outer circle of the combustion furnace above and below the inner air port respectively, a bobbin plate is welded on the outer circle of the bottom of the combustion furnace, and the inner heating chamber is communicated with the outer heating chamber through the inner air port.

Preferably, the outer cylinder is sleeved outside the ring plate and the cylinder plate, the joint of the combustion furnace, the ring plate, the outer cylinder and the cylinder plate is subjected to welding and sealing treatment, and the vertical parts of the upper end and the lower end of the outer spiral pipe penetrate through the through holes in the adjacent ring plates and are welded and fixed.

Preferably, the outer heating chamber is a space between two annular plates, the upper water chamber is a space between the combustion furnace and the outer cylinder above the upper annular plate, the lower water chamber is a space between the lower annular plate and the cylindrical plate, the lower water chamber is as high as a heat insulation disc in the combustion furnace, an outer air opening is formed in the outer circle of the outer cylinder, and the outer heating chamber is communicated with the outer space through the outer air opening.

Preferably, the top end of the combustion furnace is fixed with a top cover and a sealing piece through screws, three vertical disc bolts are arranged in the heat insulation disc, and the upper ends of the disc bolts are fixed with the top cover and the sealing piece through nuts.

Preferably, two vertical end parts of the inner spiral pipe penetrate through the top cover and the sealing piece and are fixed with the top cover and the sealing piece through nuts, a water inlet pipe and a gas outlet pipe are respectively fixed at two ends of the inner spiral pipe penetrating through the top cover and the sealing piece, the inner spiral pipe is composed of an inner layer and an outer layer, the outer layer of the inner spiral pipe is formed by clockwise spiral arrangement and serves as an inlet of cold fluid, the inner layer of the inner spiral pipe is formed by anticlockwise spiral arrangement and serves as an outlet of hot fluid after heat exchange is carried out on the cold fluid.

Preferably, the edge of the opening of the center of the circle in the middle of the sealing element is provided with through holes distributed in an annular array, screws screwed into threaded holes of the flange part of the burner are arranged in the through holes, and the axial lead of the burner is overlapped with the axial lead of the inner spiral pipe.

Preferably, the outer heating chamber is connected with a water inlet pipe of the water pump through a pipeline, and a water outlet pipe of the water pump is connected with a water inlet pipe through a pipeline.

Preferably, the top cover and the sealing piece are fixed with the combustion furnace through bolts passing through holes on the edges of the top cover and the sealing piece into threaded holes in a flange plate at the upper end of the combustion furnace.

As a further proposal of the invention, the inner air port and the outer air port are staggered, and the connecting line of the inner air port and the outer air port passes through the axial lead of the combustion furnace.

The invention has the technical effects and advantages that: the high-efficiency energy-saving steam boiler adopts a laser welding spiral finned tube as a raw material of a heat exchange tube to carry out an inner spiral tube and an outer spiral tube which are formed by spirally winding structures, the inner spiral tube in a hearth consists of an inner layer and an outer layer, wherein the outer layer of the inner layer of the outer layer is formed by adopting a clockwise spiral arrangement and is used as an inlet of a cold fluid, the inner layer of the outer layer of the inner layer of the outer layer of the inner layer of the outer layer of the inner layer of the outer layer of the inner layer of the outer layer of the inner layer of the outer layer, high-temperature flue gas generated after combustion is diffused around to flush the inner spiral pipe and the outer spiral pipe for convective heat transfer, and compared with the traditional radiant heat transfer pipe and convective heat transfer pipe which are separately and independently arranged, the heat transfer pipe absorbs radiant heat energy and convective heat energy simultaneously, so that the total heat transfer coefficient of the hearth is improved;

the higher temperature flue gas from the inner heating chamber washes the outer spiral pipes which are uniformly arranged along the central circle along an omega channel, simultaneously, a water pump is adopted to pump water from the lower water chamber to the upper water chamber, the flow speed in the outer spiral pipes is accelerated, the Reynolds number in the pipes is improved, and the heat transfer coefficient in the pipes is increased, the inner spiral pipes are of a double-layer spiral pipe structure, so the total heat transfer coefficient is high, the number of the groups of the outer spiral pipes in the pipes can be reduced, the larger the total heat transfer coefficient is, the smaller the required heat exchange area is, the length required by the inner spiral pipes and the outer spiral pipes is reduced, the heat exchange area per unit length is increased by the annular flaky part outside the spiral pipes, the length of the heat exchange pipes is further reduced, the volume of the product and the materials of other accessories of the product are reduced after reasonable arrangement, the manufacturing difficulty is reduced, the production efficiency is improved, the floor occupation cost of a user is greatly reduced, and the heat exchange efficiency is greatly improved, The material and labor cost in the manufacturing process, and the temperature of the discharged smoke can be reduced to below 150 ℃;

set up outer coil pipe around furnace, the heat loss heat of interior heating chamber combustion process carries out the convection current with the normal atmospheric temperature demineralized water in the outer coil pipe and conducts heat transfer, the heat that originally should lose is almost absorbed the back by normal atmospheric temperature water completely, the normal atmospheric temperature water that the temperature risees carries out the heat exchange through the interior coil pipe in the water pump entering interior heating chamber, whole process is equivalent to the twice heat transfer process that does not need any extra energy, and the lateral wall that interior heating chamber had been avoided completely to this structure uses heat-insulating material, the construction process that the insulating layer is complicated has been reduced, when reducing raw and other materials cost, the human cost is greatly reduced also.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the structure of the present invention in a separated state;

FIG. 3 is a schematic illustration of the position of various components of the present invention;

FIG. 4 is a schematic view of the position of the various chambers of the present invention;

FIG. 5 is a schematic view of the venting position of the present invention;

fig. 6 is a schematic view of a water pump connection structure according to the present invention.

In the figure: 1. a water inlet pipe; 2. an air outlet pipe; 3. a top cover; 4. a seal member; 5. a burner; 6. an inner spiral tube; 7. an outer spiral tube; 8. a thermally insulating disk; 801. a disc bolt; 9. a combustion furnace; 901. an inner air port; 10. a ring plate; 11. an outer cylinder; 1101. an outer air port; 12. a bobbin plate; 13. an inner heating chamber; 14. An outer heating chamber; 15. a water feeding chamber; 16. and a water outlet chamber.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-4, a high-efficiency energy-saving steam boiler comprises an inner heating chamber 13 and an annular outer heating chamber 14 located outside the inner heating chamber 13, a burner 5 is arranged inside the inner heating chamber 13, inner spiral pipes 6 are arranged outside the burner 5, a plurality of groups of outer spiral pipes 7 distributed in an annular array are arranged inside the outer heating chamber 14, an upper water chamber 15 is arranged above the outer heating chamber 14, a lower water chamber 16 is arranged below the outer heating chamber 14, a heat insulation disc 8 is arranged at the bottom of the inner heating chamber 13, the inner heating chamber 13 is communicated with the inner space of the outer heating chamber 14, the outer heating chamber 14 is communicated with the outer space, the inner spiral pipe 6 is double-spiral in profile, the outer spiral pipe 7 is single-spiral in profile, a plurality of annular sheets distributed at equal intervals are sleeved on the tubular parts of the inner spiral pipe 6 and the outer spiral pipe 7, and the specific structure of the burner 5 is the prior art and is a heating device or assembly adopting gas combustion;

the inner heating chamber 13 is an inner space of the combustion furnace 9, the outline of the combustion furnace 9 is in a circular cup shape, an inner air port 901 is formed in the excircle of the lower side of the combustion furnace 9, a flange with a threaded hole is arranged at the upper edge of the combustion furnace 9, two ring plates 10 are sleeved on the excircle of the lower side of the combustion furnace 9, the two ring plates 10 form a closed cavity, the two ring plates 10 are respectively welded and fixed on the excircle of the combustion furnace 9 above and below the inner air port 901, a bobbin plate 12 is welded on the excircle of the bottom of the combustion furnace 9, the inner heating chamber 13 is communicated with the outer heating chamber 14 through the inner air port 901, and the.

Referring to fig. 2-4, an outer cylinder 11 is sleeved outside a ring plate 10 and a bobbin plate 12, a joint where a combustion furnace 9, the ring plate 10, the outer cylinder 11 and the bobbin plate 12 are connected is subjected to welding and sealing treatment, vertical parts of the upper end and the lower end of an outer coil 7 penetrate through holes in the adjacent ring plates 10 and are welded and fixed, an outer heating chamber 14 is a space between the two ring plates 10, an upper water chamber 15 is a space between the combustion furnace 9 and the outer cylinder 11 above the upper ring plate 10, a lower water chamber 16 is a space between the combustion furnace 10 and the bobbin plate 12, the lower water chamber 16 is as high as an insulating disc 8 inside the combustion furnace 9, an outer air port 1101 is formed in an outer circle of the outer cylinder 11, the outer heating chamber 14 is communicated with the outer space through the air port 1101, and the insulating disc 8 can enable the inner heating chamber 13 and the lower water chamber 16 to be staggered.

Referring to fig. 2-4, a top cover 3 and a sealing element 4 are fixed at the top end of a combustion furnace 9 through screws, three vertical disc bolts 801 are arranged in a heat insulation disc 8, the upper ends of the disc bolts 801 are fixed with the top cover 3 and the sealing element 4 through nuts, two vertical end parts of an inner spiral pipe 6 penetrate through the top cover 3 and the sealing element 4 and are fixed with the top cover 3 and the sealing element 4 through nuts, a water inlet pipe 1 and a gas outlet pipe 2 are respectively fixed at two ends of the inner spiral pipe 6 penetrating through the top cover 3 and the sealing element 4, through holes distributed in an annular array are formed in the edge of a circle center opening in the middle of the sealing element 4, screws screwed into threaded holes of a flange part of a combustor 5 are arranged in the through holes, the axial leads of the combustor 5 and the inner spiral pipe 6 coincide, the sealing element 4 is used for connecting the combustor 5, and the combustor 5 is not fixed with the top cover 3.

Referring to fig. 2-6, the external heating chamber 14 is connected to the water inlet pipe of the water pump through a pipe, the water outlet pipe of the water pump is connected to the water inlet pipe 1 through a pipe, the internal spiral pipe 6 is composed of an inner layer and an outer layer, wherein the outer layer is formed by clockwise spiral arrangement as the inlet of cold fluid, the inner layer is formed by counterclockwise spiral arrangement as the outlet of hot fluid after heat exchange of cold fluid, the top cover 3 and the sealing element 4 pass through the through hole on the edge of the top cover and enter the threaded hole in the flange plate at the upper end of the combustion furnace 9 through the bolt to be fixed with the combustion furnace 9, the inner air port 901 and the outer air port 1101 are staggered with each other, and the connecting line of the inner air port 901 and the outer air port 1101 passes through the axial lead of the combustion furnace 9.

The working principle of the high-efficiency energy-saving steam boiler is that water is injected into an upper water chamber 15, water flows into a lower water chamber 16 through an outer spiral pipe 7, then the water is input into a water inlet pipe 1 by a water pump, then the water enters into an inner spiral pipe 6, along with the heating of a burner 5, the flame of the burner 5 burns and heats the water in the inner spiral pipe 6 to change the water into water vapor, the water vapor is output from an air outlet pipe 2 for external equipment, the burnt high-temperature fuel gas heats the inner spiral pipe 6 in an inner heating chamber 13, then the high-temperature fuel gas passes through an inner air port 901 to enter into an outer heating chamber 14, a plurality of outer spiral pipes 7 distributed in an annular array form pass through an omega-shaped flow passage, the hot air passes through the outer spiral pipes 7 to heat the water in the outer spiral pipes 7, the hot air flows out from the inner part of an opening 1101, the hot air can contact with the side wall of a combustion furnace 9, and the side wall of the combustion furnace 9 can contact the upper water chamber 15 and the lower water chamber 16 to absorb a part of heat, the outer spiral pipe 7 is added to absorb heat, so that the radiant heat emitted by the combustion of the combustor 5 can be absorbed to the maximum extent, and the good heat utilization rate is achieved;

the inner spiral pipe 6 in the hearth is composed of an inner layer and an outer layer, wherein the outer layer of the tubular part is formed by clockwise spiral arrangement, the tubular part is used as an inlet of a cold fluid, the inner layer of the tubular part is formed by anticlockwise spiral arrangement, the tubular part is used as a cold fluid to be converted into an outlet of a hot fluid after heat exchange, the inner layer and the outer layer are connected in a series connection mode, and therefore the cold fluid flows in a single pipe.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the inventive concept of the present invention should be covered by the scope of the present invention.

Claims

1. An energy efficient steam boiler comprising an inner heating chamber (13) and an annular outer heating chamber (14) located outside thereof, characterized in that: the utility model discloses a heat insulation heating chamber, including interior heating chamber (13), combustor (5) outside is equipped with interior screwed pipe (6), the inside outer screwed pipe (7) of a plurality of groups that are equipped with annular array and distribute of outer heating chamber (14), outer heating chamber (14) top is equipped with upper water chamber (15), outer heating chamber (14) below is equipped with down hydroecium (16), interior heating chamber (13) bottom is provided with thermal-insulated disc (8), the inner space intercommunication of interior heating chamber (13) and outer heating chamber (14), outer heating chamber (14) and exterior space intercommunication, the profile of interior screwed pipe (6) is two heliciform, the profile of outer screwed pipe (7) is single spiral, all the cover is equipped with the annular sheet of a plurality of equidistance distributions on the tubulose part of interior screwed pipe (6) and outer screwed pipe (7).

2. An energy efficient steam boiler according to claim 1, wherein: the inner heating chamber (13) is an inner space of the combustion furnace (9), the outline of the combustion furnace (9) is in a circular cup shape, an inner air port (901) is formed in the excircle of the lower side of the combustion furnace (9), a flange with a threaded hole is arranged at the upper edge of the combustion furnace (9), two annular plates (10) are sleeved on the excircle of the lower side of the combustion furnace (9), the two annular plates (10) are respectively welded and fixed on the excircle of the combustion furnace (9) above and below the inner air port (901), a cylindrical plate (12) is welded on the excircle of the bottom of the combustion furnace (9), and the inner heating chamber (13) is communicated with the outer heating chamber (14) through the inner air port (901).

3. An energy efficient steam boiler according to claim 2, wherein: the outer cylinder (11) is sleeved outside the ring plate (10) and the cylinder plate (12), welding and sealing treatment is carried out on the connection positions of the combustion furnace (9), the ring plate (10), the outer cylinder (11) and the cylinder plate (12), and the vertical parts of the upper end and the lower end of the outer spiral pipe (7) penetrate through the through holes in the adjacent ring plates (10) and are fixed in a welding mode.

4. A high efficiency energy saving steam boiler according to claim 3, characterized in that: the outer heating chamber (14) is a space between two annular plates (10), the upper water chamber (15) is a space between the combustion furnace (9) above the upper annular plate (10) and the outer cylinder (11), the lower water chamber (16) is a space between the lower annular plate (10) and the cylindrical plate (12), the lower water chamber (16) is as high as a heat insulation disc (8) in the combustion furnace (9), an outer air opening (1101) is formed in the outer circle of the outer cylinder (11), and the outer heating chamber (14) is communicated with an external space through the outer air opening (1101).

5. An energy efficient steam boiler according to claim 1, wherein: the top end of the combustion furnace (9) is fixed with a top cover (3) and a sealing element (4) through screws, three vertical disc bolts (801) are arranged in the heat insulation disc (8), and the upper ends of the disc bolts (801) are fixed with the top cover (3) and the sealing element (4) through nuts.

6. An energy efficient steam boiler according to claim 5, wherein: two perpendicular tip of interior spiral pipe (6) all pass top cap (3) and sealing member (4) and are fixed with top cap (3) and sealing member (4) through the nut, the both ends of passing interior spiral pipe (6) of top cap (3) and sealing member (4) are fixed with inlet tube (1) and outlet duct (2) respectively, interior spiral pipe (6) are by inside and outside two-layer constitution, wherein outer tubulose part adopts clockwise spiral to arrange and forms, as the import of cold fluid, the tubulose part of inlayer adopts anticlockwise spiral to arrange and forms, convert into the export of hot-fluid after carrying out the heat exchange as cold fluid.

7. An energy efficient steam boiler according to claim 6, wherein: the edge of a circle center opening in the middle of the sealing element (4) is provided with through holes distributed in an annular array, screws screwed into threaded holes of a flange part of the combustor (5) are arranged in the through holes, and the axial lead of the combustor (5) is overlapped with the axial lead of the inner spiral pipe (6).

8. An energy efficient steam boiler according to claim 1, wherein: the outer heating chamber (14) is connected with a water inlet pipe of the water pump through a pipeline, and a water outlet pipe of the water pump is connected with the water inlet pipe (1) through a pipeline.

9. An energy efficient steam boiler according to claim 6, wherein: the top cover (3) and the sealing element (4) pass through holes on the edges of the top cover and the sealing element through bolts to enter threaded holes in a flange plate at the upper end of the combustion furnace (9) to be fixed with the combustion furnace (9).

10. A high efficiency energy saving steam boiler according to claim 3, characterized in that: the inner air port (901) and the outer air port (1101) are staggered, and a connecting line of the inner air port (901) and the outer air port (1101) passes through the axial lead of the combustion furnace (9).