Multi-loop water heating energy-saving steam boiler

Abstract

The invention belongs to the technical field of steam boilers, and discloses a multi-loop water heating energy-saving steam boiler which comprises a boiler shell and a boiler core, the boiler core is connected with a water inlet pipe and a gas collecting pipe, and the boiler shell is provided with a burner installation opening used for being connected with a burner to heat the boiler core; a first furnace core cavity is defined by the right membrane type wall and the middle membrane type wall, and a second furnace core cavity is defined by the middle membrane type wall and the left membrane type wall. A flue is defined by the furnace wall and the furnace core, and the flue is divided into a first flue and a second flue by the partition plate. Smoke generated by the combustor in the first furnace core cavity flows along a smoke channel formed by communicating the first furnace core cavity, the second furnace core cavity, the first flue and the second flue to heat the furnace core. The energy-saving stove has the beneficial effects that smoke generated by the combustor in the first stove core cavity flows along the smoke channel formed by communicating the first stove core cavity, the second stove core cavity, the first flue and the second flue, the stove core is heated from the two sides of the stove core at the same time, heat energy is fully utilized, and the purpose of saving energy is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of steam boilers, and in particular relates to an energy-saving steam boiler for heating water with multiple circuits. Background Art

[0002] In a D-type boiler, high-temperature steam or superheated steam can be obtained by heating the membrane wall with a burner. For example, Chinese invention patent CN202010900869.7 discloses a water-cooled corrugated flue natural gas-fired boiler, comprising an upper drum, a lower drum, a burner, a convection edge membrane wall, a left membrane wall, a convection tube bundle, a front end straight membrane wall, a rear end straight membrane wall, a top membrane wall, a bottom membrane wall, a right membrane wall, and a corrugated furnace. An installation duct is fixedly provided on the front end straight membrane wall, and the burner is arranged in the installation duct to spray flame into the corrugated furnace. An airflow turning channel entering the interior of the convection tube bundle is provided between the rear side of the left membrane wall and the rear end straight membrane wall, and a smoke exhaust port is provided on the front side of the convection edge membrane wall. The present invention makes full use of the existing furnace space and arranges a corrugated furnace, which significantly reduces the volume of the boiler, facilitates the large-scale boiler, and reduces the overall transportation cost; the corrugated structure can destroy the boundary layer of the flue gas, play a role in enhancing heat transfer, absorb more heat to reduce the heat of the high-temperature flue gas coming out of the furnace, increase the operating time of the boiler, and reduce the maintenance cost of the boiler.

[0003] However, in the above scheme, only one side of the membrane wall on both sides can be heated, and the side facing away from the flue cannot be directly heated, so the utilization of thermal energy is not sufficient; at the same time, part of the heat is not fully used to heat water to obtain high-temperature steam or superheated steam; The Chinese utility model CN200720039182.9 relates to a two-pass full-membrane wall structure integrated water tube boiler, which is divided into a boiler body and an economizer. The overall structure of the boiler body adopts a double-drum longitudinal "D" type layout structure, including a furnace (1), an upper drum (2), a lower drum (3), a convection tube bundle (4), a superheater (5), an upper header (11) and a lower header (12). A convection tube bundle (12) is arranged between the upper drum (2) and the lower drum (3). 4) and superheater (5), the right side of the drum is a furnace (1) composed of a full membrane wall, and the economizer (6) is arranged on the left side of the boiler body; the furnace (1) is composed of a left membrane wall (7), a right membrane wall (8), a front membrane wall (9) and a rear membrane wall (10), the left and right membrane walls are directly connected to the upper and lower drums, the front membrane wall and the rear membrane wall are collected by an upper header and a lower header, the upper header (11) is connected to the upper drum (2), and the lower header (12) is connected to the lower drum (3). The boiler body adopts a full membrane wall seal to achieve micro-positive pressure combustion, high efficiency, and realize the complete delivery of the oil-fired gas water tube boiler with an extremely compact structure. In this patent scheme, "the superheater is built in the front part of the convection tube bundle flue, mainly using convection heat exchange, small thermal fluctuation, and small steam temperature deviation"; that is, the convection tube bundle flue is used to heat the superheater to obtain high-temperature steam, and further use the heat energy after gas combustion.

[0004] However, there is still a situation where the membrane walls on both sides are only heated on one side, and the heat energy after the gas combustion is not fully utilized. Summary of the invention

[0005] The objective of the present invention is to solve the technical problem that the membrane walls on both sides of the D-type gas steam boiler in the prior art are only heated on one side, and the heat energy after the gas combustion is not fully utilized.

[0006] In order to achieve the above objectives, the present invention provides an energy-saving steam boiler for heating water with multiple circuits.

[0007] The specific technical solution adopted by the present invention is: An energy-saving steam boiler for heating water in multiple circuits comprises a furnace shell and a furnace core, the furnace core is connected with a water inlet pipe and a gas collecting pipe, the furnace shell is provided with a burner installation port for connecting a burner to heat the furnace core; the right membrane wall, the middle membrane wall and the left membrane wall are collected at a first water pipe at the top of the furnace wall, and the right membrane wall, the middle membrane wall and the left membrane wall are collected at a second water pipe at the bottom of the furnace wall; the furnace core comprises a right membrane wall, a middle membrane wall and a left membrane wall, the right membrane wall and the middle membrane wall form a first furnace core cavity, and the middle membrane wall and the left membrane wall form a second furnace core cavity; The furnace core comprises a right membrane wall, a middle membrane wall and a left membrane wall, wherein the right membrane wall and the middle membrane wall form a first furnace core cavity, and the middle membrane wall and the left membrane wall form a second furnace core cavity; The furnace shell includes a furnace wall sleeved on the outside of the furnace core and a partition connected to the furnace core; the furnace wall and the furnace core form a flue, and the partition divides the flue into a first flue and a second flue; The flue gas generated by the burner in the first furnace core cavity flows along a flue gas channel formed by the first furnace core cavity, the second furnace core cavity, the first flue and the second flue to heat the furnace core.

[0008] Furthermore, the first furnace core cavity, the second furnace core cavity, the first flue and the second flue are connected in sequence and their volumes decrease in sequence.

[0009] Furthermore, the smoke channel is U-shaped.

[0010] Furthermore, taking the common vertical plane of the first water pipe and the second water pipe as a reference, the right membrane wall, the middle membrane wall and the left membrane wall are connected to the first water pipe and the second water pipe at an angle M in the vertical plane, 0°<A<90°.

[0011] Furthermore, the first water pipe is connected to a gas collecting pipe for collecting superheated steam.

[0012] Furthermore, a water inlet pipe and a scale discharge pipe are connected to the bottom of the second water pipe.

[0013] Furthermore, the end of the furnace shell is tightly connected to the left membrane wall and the right membrane wall through a first connecting partition to form a connecting channel between the first furnace core cavity and the second furnace core cavity.

[0014] Furthermore, one end of the middle membrane wall is connected to the end of the furnace shell through a second connecting partition plate to seal and separate the ends of the first furnace core cavity and the second furnace core cavity.

[0015] Furthermore, a partition is provided between the furnace core and the furnace shell, the partition furnace core and the furnace shell are tightly connected, and a gap is provided between the partition and one end of the furnace shell for connecting the first flue and the second flue.

[0016] The positive effect of the present invention is that the flue gas generated by the burner in the first furnace core cavity flows along the flue gas channel formed by the first furnace core cavity, the second furnace core cavity, the first flue and the second flue, and heats the furnace core from both sides of the furnace core at the same time, thereby achieving full utilization of thermal energy and playing a role in energy saving, and solving the technical problem in the prior art that the membrane walls on both sides of the D-type gas steam boiler are only heated on one side, and the thermal energy after the gas combustion is not fully utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of an energy-saving steam boiler for heating water with multiple circuits according to the present invention; Figure 2 yes Figure 1A side view of an energy-saving steam boiler for heating water with multiple circuits according to the present invention is shown in FIG. Figure 3 yes Figure 2 The three-dimensional structure of the AA-direction cross-sectional view of an energy-saving steam boiler with multiple circuits for heating water according to the present invention is shown in the figure; Figure 4 yes Figure 3 Enlarged view of point F in the middle; Figure 5 yes Figure 3 Enlarged view of point E in the middle; Figure 6 yes Figure 2 The three-dimensional structure of the CC-direction cross-sectional view of an energy-saving steam boiler for heating water with multiple circuits of the present invention is shown in FIG. Figure 7 yes Figure 2 The three-dimensional structure of the DD-direction cross-sectional view of an energy-saving steam boiler for heating water with multiple circuits of the present invention is shown in FIG. Figure 8 yes Figure 2 The three-dimensional structure of the EE-direction cross-sectional view of an energy-saving steam boiler with multiple circuits for heating water according to the present invention is shown in FIG. Fig. 9 yes Figure 2 The three-dimensional structure of the FF-direction cross-sectional view of an energy-saving steam boiler for heating water with multiple circuits of the present invention is shown in FIG. Fig.10 yes Figure 2 A right side view of an energy-saving steam boiler for heating water with multiple circuits according to the present invention is shown in FIG. Fig.11 yes Fig.10 The present invention is shown in a three-dimensional structure of a multi-circuit energy-saving steam boiler for heating water BB to a cross-sectional view; Fig.12 yes Figure 3 The second structural form, Legend: 1—furnace shell, 2—leg, 3—first connecting flange, 4—second connecting flange, 5—water inlet pipe, 6—second water pipe, 7—burner installation port, 8—first water pipe, 9—gas collecting pipe, 10—scaling pipe, 11—smoke exhaust hole, 12—right membrane wall, 13—first smoke channel, 14—second smoke channel, 15—upper ring smoke channel, 16—first furnace core cavity, 17—front end wall insulation layer, 18—front end wall, 19—front end wall connecting plate, 20—first connecting partition , 21—lower ring smoke passage, 22—middle membrane wall, 23—left membrane wall, 24—first flue, 25—furnace shell side wall, 26—second furnace core cavity, 27—third smoke passage, 28—second smoke passage, 29—rear end wall, 30—furnace core, 31—second connecting partition, 32—rear end wall insulation layer, 33—fourth smoke passage, 34—heating water pipe, 35—connecting plate, 36—partition, 37—bottom channel, 38—front end wall flue. DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments: In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, 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 limiting the present invention.

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0021] like Figures 1 to 11 As shown, it is a structural diagram of an energy-saving steam boiler for heating water with multiple circuits provided in an embodiment of the present invention, comprising a furnace shell and a furnace core, the furnace core is connected with a water inlet pipe and a gas collecting pipe, and the furnace shell is provided with a burner installation port for connecting a burner to heat the furnace core; The furnace core comprises a right membrane wall, a middle membrane wall and a left membrane wall, wherein the right membrane wall and the middle membrane wall form a first furnace core cavity, and the middle membrane wall and the left membrane wall form a second furnace core cavity; The furnace shell includes a furnace wall sleeved on the outside of the furnace core and a partition connected to the furnace core; the furnace wall and the furnace core form a flue, and the partition divides the flue into a first flue and a second flue; The flue gas generated by the burner in the first furnace core cavity flows along a flue gas channel formed by the first furnace core cavity, the second furnace core cavity, the first flue and the second flue to heat the furnace core.

[0022] In a specific embodiment of the present invention, the flue gas generated by the burner in the first furnace core cavity flows along the flue gas channel formed by the first furnace core cavity, the second furnace core cavity, the first flue and the second flue, and heats the furnace core from both sides of the furnace core at the same time, thereby achieving full utilization of thermal energy and playing a role in energy saving, and solving the technical problem in the prior art that the membrane walls on both sides of the D-type gas steam boiler are only heated on one side, and the thermal energy after the gas combustion is not fully utilized.

[0023] Specifically, Figures 1 to 11 As shown, an energy-saving steam boiler for heating water in multiple circuits comprises a furnace shell 1 and a furnace core 30, the furnace core 30 is connected with a water inlet pipe 5 and a gas collecting pipe 9, and the furnace shell 1 is provided with a burner installation port 7 for connecting a burner to heat the furnace core 30; The furnace core 30 includes a right membrane wall 12, a middle membrane wall 22 and a left membrane wall 23, the right membrane wall 12 and the middle membrane wall 22 form a first furnace core cavity 16, and the middle membrane wall 22 and the left membrane wall 23 form a second furnace core cavity 26; wherein the right membrane wall 12, the middle membrane wall 22 and the left membrane wall 23 all include heating water pipes 34 and connecting plates 35, and the connecting plates 35 are welded between adjacent heating water pipes 34, so that a plurality of heating water pipes 34 and a plurality of connecting plates 35 form an integrally closed and airtight membrane wall; in addition to the different installation positions, the right membrane wall 12, the middle membrane wall 22 and the left membrane wall 23 also have different shapes. In the present invention, the right membrane wall 12 and the left membrane wall 23 are similar in shape to the membrane walls of the prior art, both of which are D-shaped, except that, Fig. 9As shown, by controlling the angle N, the angle M and the angle P, the right membrane wall 12, the middle membrane wall 22 and the left membrane wall 23 are tightly connected to the walls of the first water pipe 8 and the second water pipe 6 in a manner that they maintain a certain angle with the vertical plane, and are kept connected with the first water pipe 8 and the second water pipe 6; at the same time, there is no vertical section of the water pipe in the middle part of the middle membrane wall 22 that is parallel to the vertical plane, that is, the end face shape of the middle membrane wall 22 is V-shaped, and an arc transition is used at the vertex of the V-shape instead of a straight water pipe transition; the advantage of such a setting is that the length of the heating water pipe in the middle membrane wall 22 that is connected at an angle to the first water pipe 8 or the second water pipe 6 is extended; in the heating water pipe 34 connected at an angle, when the heated water evaporates in the closed heating water pipe 34 in a limited space, the water molecules enter the space above through the water surface and become steam molecules. Since the steam molecules are in a disordered thermal motion, they collide with each other, the wall of the heating water pipe 34 and the water surface. When colliding with the water surface, some molecules are attracted by the liquid molecules and return to the water to become liquid molecules. When evaporation begins, the number of water molecules entering the space is greater than the number of water molecules returning to the liquid water. As evaporation continues, the density of the steam molecules in the space continues to increase, and thus the number of molecules returning to the liquid water also increases.When the number of water molecules entering the space per unit time is equal to the number of molecules returning to the liquid water, evaporation and condensation are in dynamic equilibrium. Although evaporation and condensation are still in progress, the density of steam molecules in the space no longer increases, and the state at this time is called saturated state; water in a saturated state is called saturated liquid water, and its corresponding steam is saturated water vapor, but initially it is only wet saturated water vapor, and it becomes dry saturated steam only after the water in the water vapor is completely evaporated; the temperature of steam does not increase during the process from unsaturated to wet saturated and then to dry saturated, but it needs to absorb heat for drying. If it continues to be heated after dry saturation, the temperature will rise and become superheated steam; in the present invention, the angled connection In the connected heating water pipe, water vapor is generated and rises from the liquid water in the form of bubbles. Due to the effect of gravity during the rising process of the bubbles, the bubbles will rise along the upper side of the wall of the heating water pipe 34 connected at an angle in the liquid water and above the surface of the liquid water. In this way, the bubbles or the water vapor after the bubbles burst will always rise along the wall of the heating water pipe 34, so that the water vapor will always contact the wall of the heating water pipe 34 during the process from generation to saturated steam and then to dry saturated steam, and will be directly heated. The end face shape of the middle membrane wall 22 provided by the present invention is V-shaped, and an arc transition is adopted at the apex of the V-shape. This structural form prolongs the distance between the heating water pipe and the first water pipe in the middle membrane wall 22. 8 or the length of the heating water pipe connected at an angle to the second water pipe 6, that is, the time during which the water vapor is directly heated by the wall of the heating water pipe 34 from the generation to the saturated steam and then to the dry saturated steam is extended. Compared with the prior art, it replaces the role of the superheater in the prior art. In the prior art, the superheater heats the saturated steam by absorbing the heat of the high-temperature flue gas to increase its temperature. This process is mainly achieved by convection heat transfer and radiation heat transfer. In the present invention, it can be achieved by direct heating of the wall of the heating water pipe 34 connected at an angle. Compared with the prior art, it delays the steam rising, prolongs the heating time, is conducive to the generation of superheated steam, multi-circuit flue heating, and increases The heating area is reduced, and the process of steam passing through the superheater is reduced, thereby providing thermal energy utilization, realizing energy conservation, and achieving the effect of simplifying the equipment structure; in addition, the end face shape of the middle membrane wall 22 is V-shaped, and when the middle membrane wall 22 is heated, it can absorb the force and deformation generated by the thermal expansion of the middle membrane wall 22, and eliminate the force generated by the thermal expansion through the V-shaped deformation, thereby avoiding absorption of the force generated by the thermal expansion of the middle membrane wall 22 at the welding point between the middle membrane wall 22 and the first water pipe 8 and the second water pipe 6, thereby avoiding welding and fracture at the welding point between the middle membrane wall 22 and the first water pipe 8 and the second water pipe 6, thereby improving the safety and service life of the welding between the middle membrane wall 22 and the first water pipe 8 and the second water pipe 6.

[0024] The right membrane wall 12 and the middle membrane wall 22 enclose the first furnace core cavity 16. The right membrane wall 12 and the middle membrane wall 22 are fixedly connected to a rear end wall 29 at one end located at the burner installation port 7. The rear end wall 29 is sealed and connected to the middle membrane wall 22 through a second connecting partition 31. The rear end wall 29 is also provided with a rear end wall insulation layer 32. The rear end wall 29 is sealed and connected to the right membrane wall 12 through the insulation layer 32. The burner installation port 7 penetrates the rear end wall insulation layer 32 and is connected to the first furnace core cavity 16. The right membrane wall 12 and the left membrane wall 23 are away from the burner installation port 7. One end of the opening 7 is fixedly connected to a front end wall 18, and the front end wall 18 is respectively sealedly connected to the right membrane wall 12 and the left membrane wall 23 through a first connecting partition 20. A first gap is provided between the front end wall 18 and the middle membrane wall 22, and the first gap connects the first furnace core cavity 16 and the second furnace core cavity 26; the middle membrane wall 22 and the left membrane wall 23 form a second furnace core cavity 26; the left membrane wall 23 is located at one end of the burner mounting opening 7, and a second gap is provided between the left membrane wall 23 and the rear end wall 29, and the second gap connects the second furnace core cavity 26 and the first flue 24.

[0025] The furnace shell 1 includes a furnace wall sleeved on the outside of the furnace core and a partition 36 connected to the furnace core; the furnace wall and the furnace core form a flue, and the partition divides the flue into a first flue 24 and a second flue 14; The furnace wall includes a cylindrical furnace shell side wall 25, a front end wall 18 and a rear end wall 29 fixed at both ends of the furnace shell side wall 25, the front end wall 18 is fixedly connected to the furnace shell side wall 25 through a front end wall connecting plate 19, and the front end wall 18 is provided with a front end wall insulation layer 17 for heat preservation of the furnace wall; similarly, the rear end wall 29 is provided with a rear end wall insulation layer 32 for heat preservation of the furnace wall; the bottom of the furnace shell side wall 25 is also penetrated by a support leg 2 fixed on the outside of the right membrane wall 12 and the left membrane wall 23, and a plurality of support legs 2 are provided for supporting and fixing an energy-saving steam boiler for heating water in multiple circuits.

[0026] Preferably, Figure 6 or Fig. 9 As shown, the partition 36 can be set at the top of the furnace core 30, in which case the flue gas passes through the upper ring smoke path 15; it can also be set at the bottom of the furnace core 30, in which case the flue gas passes through the lower ring smoke path 21; it can also be set at the top and bottom of the furnace core 30, in which case the flue gas passes through the upper ring smoke path 15 and the lower ring smoke path 21.

[0027] Preferably, Fig.11As shown, the partition 36 can be tightly connected to the rear end wall 29, and a third gap is set between it and the front end wall 18. At this time, the burner is fixed at the burner installation port 7, and the flue gas generated by the burner in the first furnace core cavity 16 flows along the first flue 13 in the first furnace core cavity 16, enters the second flue 28 in the second furnace core cavity 26 after passing through the first gap, and then enters the third flue 27 in the first flue 24 after passing through the second gap, and then enters the second flue 14 along the upper ring flue 15 or the lower ring flue 21, or the upper ring flue 15 and the lower ring flue 21, and finally enters the subsequent equipment from the smoke exhaust hole 11; the partition 36 can also be tightly connected to the front end wall 18, and a third gap is set between it and the rear end wall 29. Gap, at this time, the rear end wall 29 is tightly connected with the left membrane wall 23, the burner is fixed at the burner installation port 7, the flue gas generated by the burner in the first furnace core cavity 16 flows along the first smoke path 13 in the first furnace core cavity 16, enters the second smoke path 28 in the second furnace core cavity 26 after passing through the first gap, and then passes through the third gap along the upper ring smoke path 15 or the lower ring smoke path 21, or the upper ring smoke path 15 and the lower ring smoke path 21, enters the second flue 14, the front end wall 18 is provided with a front end wall channel to connect the smoke to the first flue 24, and the smoke exhaust hole 11 is arranged on the side close to the left membrane wall 23; the third gap is used to pass through the upper ring smoke path 15 or the lower ring smoke path 21, as well as the upper ring smoke path 15 and the lower ring smoke path 21.

[0028] Preferably, the partition 36 is tightly connected to the rear end wall 29 and the rear end wall 29, and the front end wall 18 is provided with a front end wall flue 38. At this time, the burner is fixed at the burner mounting port 7, and the flue gas generated by the burner in the first furnace core cavity 16 flows along the first flue 13 in the first furnace core cavity 16, enters the second flue 28 in the second furnace core cavity 26 after passing through the first gap, and then enters the third flue 27 in the first flue 24 after passing through the second gap, and then enters the second flue 14 along the front end wall flue 38, and finally enters the subsequent equipment from the smoke exhaust hole 11.

[0029] Preferably, the first furnace core cavity, the second furnace core cavity, the first flue and the second flue are connected in sequence and their volumes decrease in sequence, or the first furnace core cavity, the second furnace core cavity, the second flue and the first flue are connected in sequence and their volumes decrease in sequence.

[0030] Furthermore, the smoke channel is U-shaped.

[0031] Furthermore, the right membrane wall, the middle membrane wall and the left membrane wall are collected in a first water pipe at the top of the furnace wall, and the right membrane wall, the middle membrane wall and the left membrane wall are collected in a second water pipe at the bottom of the furnace wall.

[0032] Furthermore, taking the common vertical plane of the first water pipe and the second water pipe as a reference, the right membrane wall, the middle membrane wall and the left membrane wall are connected to the first water pipe and the second water pipe at an angle M in the vertical plane, 0°<A<90°; preferably, 10°≤A≤45°; preferably, 12°≤A≤30°.

[0033] Furthermore, the first water pipe is connected to a gas collecting pipe for collecting superheated steam.

[0034] Furthermore, a water inlet pipe and a scale discharge pipe are connected to the bottom of the second water pipe.

[0035] Furthermore, the end of the furnace shell is tightly connected to the left membrane wall and the right membrane wall through a first connecting partition to form a connecting channel between the first furnace core cavity and the second furnace core cavity.

[0036] Furthermore, one end of the middle membrane wall is connected to the end of the furnace shell through a second connecting partition plate to seal and separate the ends of the first furnace core cavity and the second furnace core cavity.

[0037] Furthermore, a partition is provided between the furnace core and the furnace shell, the partition furnace core and the furnace shell are tightly connected, and a gap is provided between the partition and one end of the furnace shell for connecting the first flue and the second flue, and the gap is the third gap mentioned above.

[0038] The foregoing has broadly outlined some aspects and features of various embodiments, which should be construed as merely illustrative of various potential applications. Other beneficial results may be obtained by applying the disclosed information in different ways or by combining various aspects of the disclosed embodiments. Other aspects and a more comprehensive understanding may be obtained by reference to the detailed description of the exemplary embodiments in conjunction with the accompanying drawings, within the scope defined by the claims.

[0039] The above embodiments provide a detailed description of the present invention. Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, reductions, and substitutions made by relevant technicians within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims

1. An energy-saving steam boiler for heating water in multiple circuits, comprising a furnace shell and a furnace core, the furnace core is connected to a water inlet pipe and a gas collecting pipe, the furnace shell is provided with a burner installation port for connecting a burner to heat the furnace core; the right membrane wall, the middle membrane wall and the left membrane wall are collected in a first water pipe at the top of the furnace wall, and the right membrane wall, the middle membrane wall and the left membrane wall are collected in a second water pipe at the bottom of the furnace wall; the furnace core comprises a right membrane wall, a middle membrane wall and a left membrane wall, the right membrane wall and the middle membrane wall form a first furnace core cavity, and the middle membrane wall and the left membrane wall form a second furnace core cavity, characterized in that: The furnace core comprises a right membrane wall, a middle membrane wall and a left membrane wall, wherein the right membrane wall and the middle membrane wall form a first furnace core cavity, and the middle membrane wall and the left membrane wall form a second furnace core cavity; The furnace shell includes a furnace wall sleeved on the outside of the furnace core and a partition connected to the furnace core; The furnace wall and the furnace core form a flue, and the partition divides the flue into a first flue and a second flue; The flue gas generated by the burner in the first furnace core cavity flows along a flue gas channel formed by the first furnace core cavity, the second furnace core cavity, the first flue and the second flue to heat the furnace core.

2. The energy-saving steam boiler with multiple circuits for heating water according to claim 1, characterized in that: The first furnace core cavity, the second furnace core cavity, the first flue and the second flue are connected in sequence and their volumes decrease in sequence.

3. The energy-saving steam boiler with multiple circuits for heating water according to claim 2, characterized in that: The smoke channel is U-shaped.

4. An energy-saving steam boiler with multiple circuits for heating water according to any one of claims 1 to 3, characterized in that: Taking the common vertical plane of the first water pipe and the second water pipe as a reference, the right membrane wall, the middle membrane wall and the left membrane wall are connected to the first water pipe and the second water pipe at an angle M in the vertical plane, 0°<A<90°.

5. The energy-saving steam boiler with multiple circuits for heating water according to claim 4, characterized in that: The first water pipe is connected to a gas collecting pipe for collecting superheated steam.

6. The energy-saving steam boiler with multiple circuits for heating water according to claim 5, characterized in that: The bottom of the second water pipe is connected with a water inlet pipe and a scale discharge pipe.

7. The energy-saving steam boiler with multiple circuits for heating water according to claim 6, characterized in that: The end of the furnace shell is tightly connected to the left membrane wall and the right membrane wall through a first connecting partition plate to form a connecting channel between the first furnace core cavity and the second furnace core cavity.

8. The energy-saving steam boiler with multiple circuits for heating water according to claim 7, characterized in that: One end of the middle membrane wall is connected to the end of the furnace shell through a second connecting partition plate to seal and separate the ends of the first furnace core cavity and the second furnace core cavity.

9. The energy-saving steam boiler with multiple circuits for heating water according to claim 8, characterized in that: A partition is arranged between the furnace core and the furnace shell, the partition furnace core and the furnace shell are tightly connected, and a gap is arranged between the partition and one end of the furnace shell for connecting the first flue and the second flue.

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