Efficient energy-saving steam boiler

Abstract

The efficient energy-saving steam boiler comprises an air inlet device, a combustion mechanism and an exhaust mechanism, and the combustion mechanism comprises a water inlet bin, a combustion layer and a steam storage bin which are sequentially arranged from bottom to top; the combustion layer comprises a combustion bin and an isolation bin; a plurality of steam guide pipes which vertically communicate with the water inlet bin and the steam storage bin and are arranged at intervals are arranged in the combustion bin; two membrane walls for separating the isolation bin from the combustion bin are arranged in the combustion layer; the membrane wall guides high-temperature airflow to flow to the exhaust mechanism; the exhaust mechanism comprises a vertically-arranged flue, and a multi-layer preheating device communicated with the water inlet bin through a pipeline is arranged in the flue. According to the utility model, the structure design is reasonable, the isolation cabin with the inner part and the outer wall is formed through the isolation of the mode wall, the combustion cabin is isolated and protected, the diffusion of high temperature to the outside is reduced, the temperature in the combustion cabin is ensured, the full utilization of equipment energy is realized, the full heating of water vapor is further realized, and the heat exchange efficiency of the equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of steam equipment, and in particular to a high-efficiency and energy-saving steam boiler. Background Technology

[0002] A steam boiler is a mechanical device that uses the heat energy of fuel or other energy sources to heat water into hot water or steam. Currently, most of the boilers in use are gas-fired steam boilers. Chinese patent document CN221839686U discloses a water-tube waste heat steam boiler, including a boiler body, an exhaust pipe, and a waste heat recovery assembly. The waste heat recovery assembly includes heat exchange tubes, an inlet pipe, an outlet pipe, an outer shell, a flue pipe, an exhaust pipe, an upper plate, and a lower plate. The boiler body has a combustion chamber and a furnace shell. The combustion flue gas is discharged through the exhaust pipe and enters the outer shell. The flue gas is then diverted through the flue pipe on the lower plate. A heat exchange tube is installed on the outside of each flue pipe. Water is introduced through the inlet pipe to absorb heat, and then the water that has absorbed heat is discharged and stored through the outlet pipe. Multiple heat exchange tubes are interconnected. The flue gas is gathered together through the gap between the upper plate and the outer shell and discharged through the exhaust pipe. The heat exchange tubes do not directly contact the flue gas, extending their service life. This solves the problem in existing devices where impurities in the flue gas adhere to the filter plate, causing blockage and resulting in low heating efficiency during long-term use. However, existing steam boilers suffer from incomplete combustion and uneven heating, resulting in high energy consumption. Utility Model Content

[0003] The purpose of this utility model is to provide a high-efficiency and energy-saving steam boiler to solve the problems of incomplete combustion, uneven heating, and high energy consumption in existing steam boilers.

[0004] To address the aforementioned problems, this utility model provides a high-efficiency and energy-saving steam boiler, comprising an air intake device, a combustion mechanism, and an exhaust mechanism. The combustion mechanism includes a water inlet chamber, a combustion layer, and a steam storage chamber arranged sequentially from bottom to top. The combustion layer includes a combustion chamber connecting the air intake device and the exhaust mechanism, and an isolation chamber separating the combustion chamber from an outer wall. The combustion chamber contains multiple vertically arranged steam guide pipes connecting the water inlet chamber and the steam storage chamber, spaced apart from each other. The combustion layer contains two membrane walls separating the isolation chamber and the combustion chamber. The membrane walls guide high-temperature airflow towards the exhaust mechanism. The exhaust mechanism includes a vertically arranged flue, and the flue contains a multi-layer preheating device connected to the water inlet chamber via a pipeline.

[0005] The high-efficiency and energy-saving steam boiler provided by this utility model also has the following technical features:

[0006] Furthermore, the combustion chamber is provided with a convex inner cavity; the combustion chamber is sequentially composed of a combustion section, a gap section, and a tail heat section along the direction close to the exhaust mechanism; the distance between adjacent steam pipes increases sequentially along the direction of the combustion section, the gap section, and the tail heat section.

[0007] Furthermore, the membrane wall consists of the steam pipe placed on the side and a sealing plate connecting two adjacent steam pipes.

[0008] Furthermore, the outer wall of the steam guide pipe in the combustion section and the gap section is a smooth wall; the outer wall of the steam guide pipe in the tail heat section is provided with spiral fins.

[0009] Furthermore, an isolation chamber is provided on each side of the combustion chamber; each isolation chamber is provided with at least one settling pipe that vertically connects the steam storage chamber and the water inlet chamber.

[0010] Furthermore, the top of the steam storage chamber is connected to a steam-water separator via a vertical vent pipe; the steam-water separator is equipped with an inverted V-shaped flow-gathering plate fixed to its top wall by a hanger; the flow-gathering plate is inclined upward along the direction close to the exhaust mechanism; the bottom of the steam-water separator is equipped with a guide pipe connected to the water inlet chamber on the side close to the air inlet device.

[0011] Furthermore, the air intake device includes a premixed fan connected to the combustion chamber via a pipeline; the air inlet of the premixed fan is connected to the air intake pipe; the air intake pipe is provided with an air inlet connected to the gas pipeline and controlled by a valve; and the air intake pipe is provided with a filter that connects to the external airflow.

[0012] Furthermore, the bottom of the flue is provided with a bend connecting to the inner cavity of the combustion chamber; the preheating device includes multiple layers of preheating finned tubes connected end to end and spaced apart, a water inlet pipe connecting multiple inlets of the preheating finned tubes, and a water outlet pipe connecting multiple outlets of the preheating finned tubes; the water inlet pipe is provided with a water inlet connected to an external water source; the water inlet pipe is located on the upper part of the side wall of the flue; the water outlet pipe is connected to the water inlet chamber through a pipeline.

[0013] Furthermore, the top of the gas storage chamber is provided with an arc-shaped dome.

[0014] This utility model has the following beneficial effects: The structure is reasonable and simple. Through finned tubes connected end-to-end within the flue, heat exchange occurs between the water flow within the finned tubes and the airflow within the flue, rapidly cooling the flue gas and treating high-temperature gases, thus reducing the equipment's environmental impact. Furthermore, the water flow within the finned tubes undergoes rapid preheating after heat exchange, increasing the water temperature in the inlet chamber without increasing energy consumption, reducing the heat required for the airflow entering the combustion chamber, lowering equipment energy consumption, and improving equipment efficiency. An isolation chamber with a partition wall further isolates the combustion chamber, reducing the diffusion of high temperatures and ensuring the temperature within the combustion chamber. A preheating device connected to the inlet chamber in the flue preheats the water flow entering the inlet chamber through heat exchange, simultaneously cooling the exhaust gas from the combustion chamber, reducing the environmental impact of high-temperature exhaust gas, fully utilizing the equipment's energy, and further achieving sufficient heating of water vapor, thus improving the equipment's heat exchange efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 3 This is a schematic cross-sectional view of an embodiment of the present utility model;

[0018] Figure 4 This is an internal schematic diagram of the exhaust mechanism according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the internal structure of the combustion mechanism in an embodiment of the present invention;

[0020] Figure 6 This is a cross-sectional schematic diagram of the combustion layer in an embodiment of the present invention;

[0021] In the diagram: 1-combustion mechanism, 11-water inlet chamber, 12-combustion layer, 121-combustion chamber, 1211-combustion section, 1212-gap section, 1213-tail heat section, 122-isolation chamber, 1221-settling pipe, 123-steam guide pipe, 124-membrane wall, 1241-sealing plate, 13-steam storage chamber, 131-vent pipe, 2-air intake device, 21-premixed fan, 22-air intake pipe, 23-air inlet, 24-filter, 3-exhaust mechanism, 31-flue, 32-bend, 4-steam-water separator, 41-flow concentrator, 42-hanger, 43-flow guide pipe, 5-preheating device, 51-preheating finned tube, 52-water inlet pipe, 53-water outlet pipe, 54-water inlet. Detailed Implementation

[0022] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0023] like Figures 1 to 6 In one embodiment of the high-efficiency and energy-saving steam boiler of this utility model, as shown,

[0024] A high-efficiency and energy-saving steam boiler includes an air intake device 2, a combustion mechanism 1, and an exhaust mechanism 3. The combustion mechanism 1 includes a water inlet chamber 11, a combustion layer 12, and a steam storage chamber 13 arranged sequentially from bottom to top. The combustion layer 12 includes a combustion chamber 121 connecting the air intake device 2 and the exhaust mechanism 3, and an isolation chamber 122 separating the combustion chamber 121 from the outer wall. The combustion chamber 121 is provided with multiple vertically arranged steam guide pipes 123 that connect the water inlet chamber 11 and the steam storage chamber 13 and are spaced apart. The combustion layer 12 is provided with two membrane walls 124 that separate the isolation chamber 122 from the combustion chamber 121. The membrane walls 124 guide the high-temperature airflow to the exhaust mechanism 3. The exhaust mechanism 3 includes a vertically arranged flue 31, and a multi-layer preheating device 5 connected to the water inlet chamber 11 through a pipeline is provided in the flue 31. The combustion chamber is further isolated by an isolation chamber with a mode wall separating the inner and outer walls, reducing the diffusion of high temperature to the outside and ensuring the temperature inside the combustion chamber. Furthermore, a preheating device connected to the water inlet chamber is installed on the flue to exchange heat and preheat the water entering the water inlet chamber, while simultaneously cooling the exhaust gas discharged from the combustion chamber, reducing the impact of high-temperature exhaust gas on the environment, realizing full utilization of equipment energy, and further achieving sufficient heating of water vapor.

[0025] Specifically, the combustion chamber 121 has a convex inner cavity; the combustion chamber 121, along the direction near the exhaust mechanism 3, consists of a combustion section 1211, a gap section 1212, and a tail heat section 1213; the spacing between adjacent steam guide pipes 123 increases sequentially along the directions of the combustion section 1211, the gap section 1212, and the tail heat section 1213. By setting three spaces with progressively increasing gaps in the steam guide pipes, a convex inner cavity is formed. In the combustion section near the ignition port, the high-temperature airflow directly contacts the steam guide pipes for rapid heating. In the gap section, the gaps in the steam guide pipes widen, increasing the airflow space and ensuring smooth airflow. After the airflow temperature decreases, it enters the tail heat section. In this section, by increasing the space and coordinating with the airflow being moved away from the vent, the airflow speed is slowed down, ensuring sufficient contact between the steam guide pipes and the high-temperature airflow, achieving sufficient heat exchange time, and ensuring the efficiency of steam generation.

[0026] Specifically, the membrane wall 124 consists of a steam pipe 123 placed on the side and a sealing plate 1241 connecting two adjacent steam pipes 123.

[0027] Specifically, the outer walls of the steam guide pipes 123 in the combustion section 1211 and the gap section 1212 are smooth; the outer walls of the steam guide pipes 123 in the tail section 1213 are equipped with spiral fins. By setting the steam guide pipes with smooth walls in the combustion section, a short-term contact of high-temperature airflow is formed, ensuring sufficient heating of the water flow in the steam guide pipes, and at the same time ensuring that the high-temperature airflow is rapidly transmitted backward, reducing the risk of high-temperature airflow accumulating at the ignition port and causing local high temperatures.

[0028] Specifically, an isolation chamber 122 is provided on each side of the combustion chamber 121; each isolation chamber 122 is equipped with at least one settling pipe 1221 that vertically connects the steam storage chamber 13 and the water inlet chamber 11. By setting up isolation chambers with settling pipes to isolate the combustion chamber from the outer wall of the equipment, the risk of high temperature in the combustion chamber directly spreading outward is effectively reduced, heat loss caused by contact between the high temperature airflow and the outside is prevented, and the thermal efficiency of the equipment is guaranteed. The water droplets condensed in the steam storage chamber are guided to the lower water inlet chamber through the settling pipes for preliminary water-vapor separation, realizing the recycling of water flow.

[0029] Specifically, the top of the steam storage chamber 13 is connected to the steam-water separator 4 via a vertical vent pipe 131; the steam-water separator 4 is equipped with an inverted V-shaped concentrator 41 fixed to its top wall by a hanger 42; the concentrator 41 is inclined upwards along the direction close to the exhaust mechanism 3; the bottom of the steam-water separator 4 is provided with a guide pipe 43 connected to the water inlet chamber 11 on the side close to the air inlet device 2. By designing the inverted V-shaped concentrator to block the steam in the vent pipe, water vapor condenses on the concentrator and is guided to the side of the guide pipe for recovery. This simple structure quickly reduces the water vapor in the airflow, achieving full utilization of water vapor.

[0030] Specifically, the air intake device 2 includes a premixed fan 21 connected to the combustion chamber 121 via a pipeline; the air inlet of the premixed fan 21 is connected to an air intake pipe 22; the air intake pipe 22 is provided with an air inlet 23 connected to the gas pipeline and controlled by a valve; and the air intake pipe 22 is provided with a filter 24 connected to the external airflow.

[0031] Specifically, the bottom of the flue 31 is provided with a bend 32 connecting to the inner cavity of the combustion chamber 121; the preheating device 5 includes multiple layers of preheating finned tubes 51 connected end to end and spaced apart, a water inlet pipe 52 connecting the inlets of multiple preheating finned tubes 51, and a water outlet pipe 53 connecting the lower ends of multiple preheating finned tubes 51; the water inlet pipe 52 is provided with a water inlet 54 connecting to an external water source; the water inlet pipe 52 is located on the upper part of the side wall of the flue 31; the water outlet pipe 53 is connected to the water inlet chamber 11 through a pipeline. Through the finned tubes connected end to end in the flue, the water flow in the finned tubes exchanges heat with the air flow in the flue, rapidly cooling the flue gas discharged from the flue, realizing the treatment of high-temperature gas, reducing the environmental impact of the equipment, and the water flow in the finned tubes is rapidly heated after heat exchange, increasing the water temperature in the water inlet chamber without increasing energy consumption, reducing the heat required for the air flow entering the combustion layer to heat up, reducing equipment energy consumption, and improving equipment efficiency.

[0032] Specifically, the top of the steam storage chamber 13 is equipped with an arc-shaped roof.

[0033] The combustion chamber 121 inlet uses a common ignition method in the prior art, such as using a combustion rod and an ignition needle for ignition; the steam pipe 123 inside the tail heat section 1213 is a finned tube.

[0034] The water inlet chamber 11 is located at the bottom of the combustion layer 12 and is connected to the bottom end of the steam pipe 123. The water inlet chamber 11 is connected to the water outlet pipe 53 through a pipeline. The sewage pipe assembly with a control valve in the prior art is used for sewage discharge inside the water inlet chamber 11. The steam storage chamber 13 is located at the top of the combustion layer 12. The top surface of the arc-shaped steam storage chamber 13 forms a good pressure bearing effect to meet the steam storage requirements. At the same time, the steam-water separator 4 separates the moisture in the steam at the top of the steam storage chamber 13.

[0035] Working principle: When the equipment is in use, external clean water enters the inlet pipe 52 through the inlet 54, passes through the preheated finned tube 51 connected end to end, and then enters the inlet chamber 11 through the pipeline. The liquid level gauge and control valve in the existing technology control the opening and closing of the loop according to the liquid level in the inlet chamber 11. After the water level in the inlet chamber 11 reaches the preset position, the equipment is ignited. The premixed blower 21 blows the gas mixed with the outside air into the combustion chamber 121, directly igniting the steam guide pipe 123 in the combustion section 121. Heating is performed in the combustion chamber 121, which has a sealed top and bottom. The internal inlet of the combustion chamber 121 uses a common combustion rod and ignition needle for ignition. The combustion chamber 121 contains multiple vertically connected steam pipes 123 linking the water inlet chamber 11 and the steam storage chamber 13. The outer walls of the steam pipes 123 within the combustion chamber 1211 are smooth and evenly distributed, with gaps between them for air circulation. This ensures good contact between the steam pipes 123 and the air, resulting in high temperatures after ignition. The airflow converts the water inside the steam pipe 123 into steam through heat exchange. In the gap section 1212, the gaps in the steam pipe 123 widen, increasing the airflow space and reducing the resistance to airflow from the dense steam pipes 123, ensuring smooth airflow. The airflow temperature decreases as it enters the tail section 1213. In this section, the airflow velocity is slowed down by the airflow stagnation space. Furthermore, the spiral fins on the outer wall of the steam pipe 123 ensure sufficient contact between the steam pipe 123 and the high-temperature airflow, achieving a sufficient duration of heat exchange. The process ensures efficient steam generation. After the high-temperature airflow enters the steam storage chamber 13 with an arc-shaped dome, the airflow initially condenses and falls from the cooler settling pipe 1221 into the water inlet chamber 12. Most of the airflow enters the steam-water separator 4 through the vent pipe 131. Guided and gathered by the inverted V-shaped concentrator 41, the water vapor in the airflow gathers and falls into the guide pipe 43 and re-enters the water inlet chamber 11 for reuse. The steam after separating the water vapor is discharged from the outlet at the top of the steam-water separator 4 for use.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-efficiency and energy-saving steam boiler, comprising an air intake device (2), a combustion mechanism (1), and an exhaust mechanism (3), characterized in that: The combustion mechanism (1) includes a water inlet chamber (11), a combustion layer (12), and a steam storage chamber (13) arranged sequentially from bottom to top; the combustion layer (12) includes a combustion chamber (121) connecting the air intake device (2) and the exhaust mechanism (3), and an isolation chamber (122) separating the combustion chamber (121) from the outer wall; the combustion chamber (121) is provided with a plurality of vertically connected and spaced-apart steam guide pipes (123) connecting the water inlet chamber (11) and the steam storage chamber (13); the combustion layer (12) is provided with two membrane walls (124) separating the isolation chamber (122) and the combustion chamber (121); the membrane walls (124) guide the high-temperature airflow to flow to the exhaust mechanism (3); the exhaust mechanism (3) includes a vertically arranged flue (31), and the flue (31) is provided with a multi-layer preheating device (5) connected to the water inlet chamber (11) through a pipeline.

2. The high-efficiency energy-saving steam boiler according to claim 1, characterized in that: The combustion chamber (121) is provided with a convex inner cavity; the combustion chamber (121) is arranged in sequence as a combustion section (1211), a gap section (1212), and a tail heat section (1213) along the direction close to the exhaust mechanism (3); the spacing between adjacent steam pipes (123) increases sequentially along the direction of the combustion section (1211), the gap section (1212), and the tail heat section (1213).

3. The high-efficiency energy-saving steam boiler according to claim 1, characterized in that: The membrane wall (124) consists of the steam pipe (123) placed on the side and the sealing plate (1241) connecting two adjacent steam pipes (123).

4. The high-efficiency energy-saving steam boiler according to claim 2, characterized in that: The outer wall of the steam pipe (123) in the combustion section (1211) and the gap section (1212) is a smooth wall; the outer wall of the steam pipe (123) in the tail heat section (1213) is provided with spiral fins.

5. The high-efficiency energy-saving steam boiler according to claim 1, characterized in that: An isolation chamber (122) is provided on each side of the combustion chamber (121); each isolation chamber (122) is provided with at least one settling pipe (1221) that vertically connects the steam storage chamber (13) and the water inlet chamber (11).

6. The high-efficiency energy-saving steam boiler according to claim 1, characterized in that: The top of the steam storage chamber (13) is connected to the steam-water separator (4) through a vertical vent pipe (131); the steam-water separator (4) is provided with an inverted V-shaped flow-gathering plate (41) fixed to its top wall by a hanger (42); the flow-gathering plate (41) is inclined upward along the direction close to the exhaust mechanism (3); the bottom of the steam-water separator (4) is provided with a guide pipe (43) connected to the water inlet chamber (11) on the side close to the air inlet device (2).

7. The high-efficiency energy-saving steam boiler according to claim 1, characterized in that: The air intake device (2) includes a premixed fan (21) connected to the combustion chamber (121) via a pipeline; the air inlet of the premixed fan (21) is connected to an air intake pipe (22); the air intake pipe (22) is provided with an air inlet (23) connected to the gas pipeline and controlled by a valve; the air intake pipe (22) is provided with a filter (24) connected to the external airflow.

8. The high-efficiency energy-saving steam boiler according to claim 1, characterized in that: The bottom of the flue (31) is provided with a bend (32) that connects to the inner cavity of the combustion chamber (121); the preheating device (5) includes multiple layers of preheating finned tubes (51) that are connected end to end and spaced apart, a water inlet pipe (52) that connects to the inlets of multiple preheating finned tubes (51), and a water outlet pipe (53) that connects to the lower ends of multiple preheating finned tubes (51); the water inlet pipe (52) is provided with a water inlet (54) that connects to an external water source; the water inlet pipe (52) is located on the upper part of the side wall of the flue (31); the water outlet pipe (53) is connected to the water inlet chamber (11) through a pipeline.

9. The high-efficiency energy-saving steam boiler according to claim 1, characterized in that: The top of the gas storage compartment (13) is provided with an arc-shaped top.

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