Energy-saving device of gas-steam boiler

Abstract

The utility model discloses an energy-saving device of a gas-steam boiler, which relates to the technical field of boilers and comprises a boiler body, an inner container is fixedly arranged in the boiler body, a plurality of overflow grooves are arranged at the top end of the inner side wall of the inner container in a penetrating manner, and one end of each overflow groove extends into the boiler body. The inner container is arranged in the boiler body, the flue gas pipe is arranged in the inner container, the overflow grooves are formed in the top end of the inner container, cold water enters the inner container firstly after being injected into the boiler and is heated in the inner container, the heated water enters the space between the boiler body and the inner container through the overflow grooves to be stored, and in the process, the water is stored in the inner container through the overflow grooves. The high-temperature flue gas firstly heats cold water in the inner container and then carries out heating and heat preservation on hot water between the boiler body and the inner container, efficient utilization of the flue gas is achieved, and meanwhile the situation that the temperature in the boiler is not uniform after the flue gas is cooled is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to an energy-saving device for a gas steam boiler. Background Art

[0002] A steam boiler is an energy conversion device. The energy input into the boiler is in the form of chemical energy in the fuel, electrical energy, thermal energy of high-temperature flue gas, etc. After conversion by the boiler, steam, high-temperature water or organic heat carrier with a certain amount of thermal energy is output to the outside.

[0003] For example, a Chinese patent application, application number [201220342300.4], discloses a gas-fired steam boiler comprising an upper tube sheet, a lower tube sheet, and a cylinder. The boiler body comprises a first inner liner and a second inner liner, with a water inlet. The first inner liner is connected to a burner pipe, while the second inner liner is divided into an upper smoke zone and a lower smoke zone by a flame baffle. The upper and lower smoke chambers are connected to the exterior of the lower tube sheet via a second-pass smoke pipe and a third-pass smoke pipe, respectively. In this scheme, after the burner flame enters the first inner liner, it ascends into the second-pass smoke pipe, then descends through the second-pass smoke pipe to the lower smoke chamber below the lower tube sheet (this is a single return heat exchange). It then ascends through the third-pass smoke pipe to the second inner liner (this is a second return heat exchange). This increases the number of return heat exchanges and improves thermal energy utilization efficiency. The smoke pipe is also resistant to flue gas corrosion, resulting in a longer service life.

[0004] However, the above technical solution has some problems in practical application. Since the heat of the flue gas continues to decrease during the circulation process, its heating efficiency for the water in the boiler gradually decreases. The multi-stage circulating flue gas exchanges heat with the water in the boiler at the same time, which easily leads to the problem of unbalanced heat exchange.

[0005] Therefore, it is necessary to invent a gas steam boiler energy-saving device to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a gas steam boiler energy-saving device to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gas steam boiler energy-saving device, comprising a furnace body, an inner tank fixedly arranged inside the furnace body, a plurality of overflow grooves penetrating the top end of the inner side wall of the inner tank, and one end of the overflow groove extends to the interior of the furnace body, a flue gas pipe fixedly arranged in the middle of the inner tank, a heat conduction plate with a spiral structure is arranged around the outside of the flue gas pipe, a fixed cover fixedly arranged on the top end of the flue gas pipe, a plurality of air guide pipes are arranged around the outer side wall of the fixed cover, a smoke exhaust hood fixedly arranged in the middle of the top end of the furnace body, a plurality of smoke exhaust pipes are arranged around the outer side wall of the smoke exhaust hood, and the plurality of smoke exhaust pipes correspond to the plurality of air guide pipes, a duct is fixedly arranged between the smoke exhaust pipe and the air guide pipe, the duct is arranged in a "U"-shaped structure, and the duct is arranged between the inner tank and the furnace body.

[0008] Preferably, a plurality of heat exchange plates are fixedly provided on the outer side of the conduit, and the heat exchange plates are arranged in an arc-shaped structure.

[0009] Preferably, a fixing block is fixedly provided inside the fixing cover, and the fixing block is provided as an inverted conical structure.

[0010] Preferably, a guide block is fixedly provided at the inner bottom end of the smoke exhaust hood, and the guide block is configured as a conical structure, and a smoke exhaust hole is provided through the middle of the top end of the smoke exhaust hood.

[0011] Preferably, a drainage pipe is provided through the bottom end of the furnace body, and a water inlet pipe is provided through the bottom end of the inner container.

[0012] Preferably, a fixing box is fixedly provided at the bottom end of the flue gas pipe, an air inlet pipe is fixedly provided on one side of the fixing box, and a plurality of supporting legs distributed in a circular array are provided at the bottom end of the outer wall of the furnace body.

[0013] The technical effects and advantages of this utility model are:

[0014] 1. The utility model sets an inner tank inside the furnace body, a flue gas pipe is set inside the inner tank, and a plurality of overflow grooves are set on the top of the inner tank. After the cold water is injected into the boiler, it first enters the inner tank and is heated in the inner tank. The heated water passes through the overflow groove and enters the space between the furnace body and the inner tank for storage. In this process, the high-temperature flue gas first heats the cold water in the inner tank, and then heats and keeps the hot water between the furnace body and the inner tank warm. This realizes the efficient utilization of the flue gas while avoiding the uneven temperature inside the boiler caused by the flue gas cooling.

[0015] 2. The utility model sets a fixed cover at the top of the flue pipe, sets a smoke exhaust cover at the top of the furnace body, sets a plurality of conduits between the fixed cover and the smoke exhaust cover, and sets a heat exchange plate on the outside of the conduit. The conduit can realize heat exchange and heat preservation of hot water through the heat exchange plate to control the temperature inside the boiler. At the same time, the hot water can undergo a certain degree of heat exchange with the cold water through the inner tank, thereby improving the heating efficiency of the cold water. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a schematic cross-sectional view of the overall structure of the utility model.

[0018] Figure 3 This is a schematic diagram of the catheter structure of the present utility model.

[0019] In the figure: 1. Furnace body; 2. Inner tank; 3. Overflow trough; 4. Smoke pipe; 5. Heat conduction plate; 6. Fixed cover; 7. Air guide pipe; 8. Exhaust hood; 9. Exhaust pipe; 10. Conduit; 11. Heat exchange plate; 12. Fixed block; 13. Guide block; 14. Exhaust hole; 15. Drain pipe; 16. Water inlet pipe; 17. Fixed box; 18. Inlet pipe; 19. Support leg. DETAILED DESCRIPTION

[0020] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0021] The utility model provides Figure 1-3 The energy-saving device for a gas-fired steam boiler shown in the figure comprises a furnace body 1, an inner liner 2 being fixedly disposed within the furnace body 1, a plurality of overflow grooves 3 being provided through the top of the inner sidewall of the inner liner 2, and one end of the overflow groove 3 extending into the interior of the furnace body 1, a flue gas pipe 4 being fixedly disposed in the middle of the inner liner 2, and a spiral heat conducting plate 5 being provided around the outside of the flue gas pipe 4;

[0022] Specifically, a fixed cover 6 is fixedly provided at the top of the smoke pipe 4, and a plurality of air guide pipes 7 are arranged around the outer wall of the fixed cover 6. A smoke exhaust cover 8 is fixedly provided at the middle of the top of the furnace body 1, and a plurality of smoke exhaust pipes 9 are arranged around the outer wall of the smoke exhaust cover 8, and the plurality of smoke exhaust pipes 9 correspond to the plurality of air guide pipes 7. A guide pipe 10 is fixedly provided between the smoke exhaust pipe 9 and the air guide pipe 7, and the guide pipe 10 is arranged in a "U"-shaped structure, and the guide pipe 10 is arranged between the inner tank 2 and the furnace body 1;

[0023] More specifically, a plurality of heat exchange plates 11 are fixedly mounted on the outside of the conduit 10, and the heat exchange plates 11 are configured as an arc-shaped structure. The arc-shaped structure can increase the contact area between the heat exchange plates 11 and the water, thereby achieving the purpose of improving the heat exchange efficiency.

[0024] At the same time, a fixing block 12 is fixedly provided inside the fixed cover 6, and the fixing block 12 is set to an inverted conical structure. A guide block 13 is fixedly provided at the bottom end of the exhaust cover 8, and the guide block 13 is set to a conical structure. A smoke exhaust hole 14 is opened through the middle of the top of the exhaust cover 8. The smoke exhaust hole 14 can realize the discharge of smoke, and the design of the conical structure of the fixing block 12 and the guide block 13 can realize the guidance of the smoke;

[0025] In addition, a drainage pipe 15 is provided through the bottom end of the furnace body 1, a water inlet pipe 16 is provided through the bottom end of the inner tank 2, a fixed box 17 is fixedly provided at the bottom end of the flue gas pipe 4, and an air inlet pipe 18 is fixedly provided on one side of the fixed box 17. The bottom end of the outer wall of the furnace body 1 is provided with a plurality of support legs 19 distributed in a circular array, and the support legs 19 can support the boiler.

[0026] Working principle of this utility model:

[0027] When the device is in use, cold water is injected into the inner tank 2 through the water inlet pipe 16, and the high-temperature flue gas enters the flue pipe 4 through the air inlet pipe 18 and the fixed box 17. At this time, the high-temperature flue gas heats the cold water in the inner tank 2 through the flue pipe 4 and the heat conduction plate 5. As the cold water is continuously injected, the cold water at the top of the inner tank 2 enters between the furnace body 1 and the inner tank 2 through the overflow groove 3, and the temperature of the water at the top of the inner tank 2 rises after heat exchange through the heat conduction plate 5. Therefore, the water between the furnace body 1 and the inner tank 2 is hot water. At the same time, the high-temperature flue gas enters the fixed cover 6 after passing through the flue pipe 4, and then enters the conduit 10 through the air guide pipe 7, and exchanges heat with the water between the furnace body 1 and the inner tank 2 through the heat exchange plate 11 to achieve heat preservation of the hot water. After the heat exchange is completed, the flue gas is discharged through the exhaust pipe 9 and the exhaust hole 14.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gas steam boiler energy-saving device, comprising a furnace body (1), characterized in that: An inner container (2) is fixedly provided inside the furnace body (1), a plurality of overflow grooves (3) are provided through the top of the inner side wall of the inner container (2), and one end of the overflow groove (3) extends to the inside of the furnace body (1), a smoke pipe (4) is fixedly provided in the middle of the inner container (2), a heat conducting plate (5) with a spiral structure is provided around the outside of the smoke pipe (4), a fixed cover (6) is fixedly provided at the top of the smoke pipe (4), and the outer wall of the fixed cover (6) is surrounded by a spiral structure. A plurality of air guide pipes (7) are arranged around the furnace body (1); a smoke exhaust hood (8) is fixedly arranged at the middle of the top end of the furnace body (1); a plurality of smoke exhaust pipes (9) are arranged around the outer wall of the smoke exhaust hood (8); and the plurality of smoke exhaust pipes (9) correspond to the plurality of air guide pipes (7); a guide pipe (10) is fixedly arranged between the smoke exhaust pipes (9) and the air guide pipes (7); the guide pipe (10) is arranged in a "U"-shaped structure, and the guide pipe (10) is arranged between the inner container (2) and the furnace body (1).

2. A gas steam boiler energy-saving device according to claim 1, characterized in that: A plurality of heat exchange plates (11) are fixedly arranged on the outer side of the conduit (10), and the heat exchange plates (11) are arranged in an arc-shaped structure.

3. The energy-saving device for a gas-fired steam boiler according to claim 2, characterized in that: A fixing block (12) is fixedly provided inside the fixing cover (6), and the fixing block (12) is configured as an inverted conical structure.

4. A gas steam boiler energy-saving device according to claim 3, characterized in that: A guide block (13) is fixedly provided at the inner bottom end of the smoke exhaust hood (8), and the guide block (13) is configured as a conical structure. A smoke exhaust hole (14) is provided through the middle of the top end of the smoke exhaust hood (8).

5. The energy-saving device for a gas-fired steam boiler according to claim 4, characterized in that: A drainage pipe (15) is provided through the bottom end of the furnace body (1), and a water inlet pipe (16) is provided through the bottom end of the inner container (2).

6. The energy-saving device for a gas-fired steam boiler according to claim 5, characterized in that: A fixed box (17) is fixedly provided at the bottom end of the smoke pipe (4), an air inlet pipe (18) is fixedly provided on one side of the fixed box (17), and a plurality of supporting legs (19) distributed in a circular array are provided at the bottom end of the outer wall of the furnace body (1).

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