Biomass water tube boiler facilitating ash removal

Abstract

The utility model relates to the technical field of boilers, in particular to a biomass water tube boiler convenient for ash removal, which comprises a boiler body, a chain base mounted at the bottom of the boiler body, a feeding hopper mounted at one end of the boiler body, a flue gas duct connected to the other end of the boiler body, a hearth arranged in the boiler body and close to the feeding hopper, and an upper boiler barrel mounted at the upper part in the boiler body, a lower boiler barrel is arranged on the lower portion of the upper boiler barrel, a heat exchange bin is arranged on the upper portion in the boiler body, and a plurality of heat exchange pipes are vertically arranged in the heat exchange bin. According to the biomass water tube boiler facilitating ash removal, the ash blower is arranged in the boiler, ash blowing is conducted on the heat exchange tubes in the heat exchange bin through the air supply pipe and the air jet opening, accumulated ash and slag on the heated surface are effectively removed, the heated surface is kept clean, and the heat transfer efficiency of the boiler is improved. And the ash discharge port and the ash cleaning port are formed in the bottom of the boiler body, so that ash at the hearth and the chain base can be conveniently and timely discharged, accumulation and blockage of the ash are avoided, and stable operation of the boiler is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, and more specifically, to a biomass water tube boiler that is easy to clean. Background Technology

[0002] Biomass energy, as the fourth largest energy source, is characterized by its low sulfur and nitrogen content, resulting in very low NOx and SO2 levels after combustion, as well as generally low ash content and extremely low soot content after complete combustion. It also boasts zero CO2 emissions, earning it the title of "zero-carbon" green energy and placing it in a crucial position within the energy system. Given the current global energy shortage, the development and utilization of biomass energy holds immense promise.

[0003] In the field of boiler technology, biomass water tube boilers, as devices that utilize biomass energy to generate steam, have always attracted attention for their performance characteristics and technological optimization. Traditional biomass water tube boilers, due to the characteristics of biomass fuel, are prone to ash and slag accumulation during combustion. This not only affects the boiler's heat transfer efficiency but may also lead to unstable boiler operation and even safety accidents. Therefore, how to effectively remove ash and slag from the boiler's heating surfaces and maintain their cleanliness has become a crucial issue that needs to be addressed in the technological development of biomass water tube boilers.

[0004] Furthermore, as a commonly used combustion device in biomass water tube boilers, the slag removal and ash cleaning efficiency of chain grate stokers directly affects the boiler's operating efficiency and safety. Traditional chain grate stokers may suffer from complex operation and incomplete ash cleaning during the slag removal and ash cleaning process, requiring further improvement and optimization. Utility Model Content

[0005] The purpose of this invention is to provide a biomass water tube boiler that is easy to clean, in order to solve the problem mentioned in the background art that traditional biomass water tube boilers are prone to ash accumulation and slag formation during combustion due to the characteristics of biomass fuel. This not only affects the heat transfer efficiency of the boiler, but may also lead to unstable boiler operation and even safety accidents.

[0006] To achieve the above objectives, this utility model provides a biomass water tube boiler that is easy to clean, comprising a furnace body, a chain base installed at the bottom of the furnace body, a feeding hopper installed at one end of the furnace body, a flue gas duct connected to the other end of the furnace body, a furnace chamber located inside the furnace body near the feeding hopper, an upper boiler drum installed at the top inside the furnace body, a lower boiler drum located below the upper boiler drum, a heat exchange chamber located at the top inside the furnace body, a plurality of heat exchange tubes vertically arranged inside the heat exchange chamber, the upper and lower ends of the heat exchange tubes being connected to the upper boiler drum and the lower boiler drum respectively, an energy-saving device installed at the outer end of the flue gas duct, and a furnace wall located between the furnace chamber and the heat exchange chamber, with an opening on one side of the furnace wall.

[0007] Preferably, an ash discharge port is provided at one end of the bottom of the furnace body near the chain base, and an ash cleaning port is provided on one side of the bottom of the furnace body.

[0008] Preferably, the inner wall of the furnace body is equipped with a water-cooled wall.

[0009] Preferably, an observation port and a fire-starting door are provided on one side of the furnace.

[0010] Preferably, a front arch is installed on one side of the upper part of the furnace, and a rear arch is installed on the other side of the upper part of the furnace.

[0011] Preferably, one end of the lower boiler drum is connected to a drain pipe, one end of the upper boiler drum is equipped with a water level gauge, the top of the upper boiler drum is equipped with a main steam valve, and a steam-water separator is installed inside the upper boiler drum near the main steam valve.

[0012] Preferably, a soot blower is installed inside the heat exchange chamber. The soot blower includes a horizontal air supply pipe with several air jets installed at the bottom of the air supply pipe.

[0013] Preferably, a platform ladder is installed on the top of the furnace body, and an ash discharge pipe is provided at the bottom of the heat exchange chamber, with an ash discharge port at the bottom of the ash discharge pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This biomass water tube boiler, designed for easy ash removal, is equipped with an internal soot blower. Through the air supply pipe and jet nozzle, soot is blown from the heat exchange tubes in the heat exchange chamber, effectively removing accumulated ash and slag from the heating surfaces, maintaining their cleanliness, and improving the boiler's heat transfer efficiency. Ash discharge and cleaning ports are located at the bottom of the boiler body, facilitating timely removal of ash and slag from the furnace and chain grate base, preventing ash and slag accumulation and blockage, and ensuring stable boiler operation.

[0016] By optimizing the furnace structure and incorporating front and rear arches, combustion conditions were improved, combustion efficiency was increased, and incomplete combustion losses were reduced. Water-cooled walls were installed on the inner wall of the furnace, enhancing the boiler's cooling effect, protecting the boiler body from the corrosive effects of high-temperature flue gas, and extending the boiler's service life. The design of the upper and lower drums and the heat exchange chamber resulted in a rational layout of the heating surfaces and flue gas flow channels, improving the boiler's thermal efficiency and economy.

[0017] An observation port and a flame-dispensing door are installed on one side of the furnace, allowing operators to easily observe the combustion process and adjust the combustion status accordingly. A platform and ladder are installed on the top of the furnace for easy access and maintenance. Ash discharge pipes and ash discharge ports are located at the bottom of the heat exchange chamber, working in conjunction with the ash removal port to enable rapid discharge and cleaning of ash and slag. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a side view of the structure of this utility model;

[0020] Figure 3 This is a top view of the structure of this utility model;

[0021] The meanings of the labels in the diagram are as follows:

[0022] 1. Furnace body; 11. Ash discharge port; 12. Ash cleaning port; 13. Water-cooled wall; 14. Furnace wall; 15. Ash drop pipe; 16. Ash drop port; 2. Chain base; 3. Feed hopper; 4. Furnace chamber; 41. Observation port; 42. Flame gate; 43. Front arch; 44. Rear arch; 5. Lower drum; 51. Sewage pipe; 6. Upper drum; 61. Water level gauge; 62. Main steam valve; 63. Steam-water separator; 7. Heat exchange chamber; 71. Soot blower; 8. Flue gas duct; 9. Eco-friendly device; 10. Platform ladder. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides a biomass water tube boiler that is easy to clean, such as... Figures 1-3As shown, the boiler includes a furnace body 1, a chain base 2 installed at the bottom of the furnace body 1, a feeding hopper 3 installed at one end of the furnace body 1, and a flue duct 8 connected to the other end of the furnace body 1. A furnace chamber 4 is located inside the furnace body 1 near the feeding hopper 3. An upper boiler drum 6 is installed above the inside of the furnace body 1, and a lower boiler drum 5 is located below the upper boiler drum 6. A heat exchange chamber 7 is located above the inside of the furnace body 1, containing several vertically arranged heat exchange tubes. The upper and lower ends of the heat exchange tubes are connected to the upper boiler drum 6 and the lower boiler drum 5, respectively. An economizer 9 is installed at the outer end of the flue duct 8. A furnace wall 14 is located between the furnace chamber 4 and the heat exchange chamber 7, with an opening on one side. The furnace body 1, as the main structure of the boiler, provides stable support for the entire boiler. The chain base 2 installed at the bottom of the furnace body 1 allows the boiler to adapt to the combustion characteristics of biomass fuel, facilitating fuel feeding and ash discharge, thus improving the boiler's operational stability. The feeding hopper 3 installed at one end of the furnace body 1 facilitates the addition of biomass fuel, improves the boiler's feeding efficiency, and reduces the labor intensity of operators. The flue gas duct 8 connected to the other end of the furnace body 1 provides an exhaust channel for the flue gas generated during combustion, ensuring the normal operation of the boiler. The economizer 9 installed at the outer end of the flue gas duct 8 can recover and utilize the waste heat in the flue gas, improving the boiler's thermal efficiency. The furnace chamber 4, located inside the furnace body 1 near the feeding hopper 3, is the main combustion site for fuel; its reasonable design ensures sufficient fuel combustion efficiency. The upper boiler drum 6 installed at the top and the lower boiler drum 5 installed at the bottom inside the furnace body 1 are connected to several heat exchange tubes in the heat exchange chamber 7, forming the boiler's heating surface system. This structural design gives the boiler a large heating area, improving the boiler's heat transfer efficiency. Several vertically arranged heat exchange tubes in the heat exchange chamber 7 are connected at their upper and lower ends to the upper boiler drum 6 and the lower boiler drum 5 respectively, forming an effective heat transfer path and ensuring the boiler's steam generation efficiency. The furnace wall 14, located between the furnace chamber 4 and the heat exchange chamber 7, serves as insulation and support, ensuring the normal operation of all boiler components. The opening on one side of the furnace wall 14 facilitates boiler inspection and maintenance.

[0025] In this embodiment, an ash discharge port 11 is provided at the bottom of the furnace body 1 near the chain base 2, and an ash cleaning port 12 is provided on one side of the bottom of the furnace body 1. This design facilitates the timely discharge of ash and slag from the furnace chamber 4 and the chain base 2, effectively preventing ash and slag accumulation and blockage, ensuring stable boiler operation and convenient ash cleaning.

[0026] Specifically, the inner wall of the furnace body 1 is equipped with a water-cooled wall 13. The water-cooled wall 13 can absorb the high-temperature radiant heat in the furnace 4, protect the furnace body 1 from the corrosion of high-temperature flue gas, and at the same time increase the heating area of ​​the boiler and improve the thermal efficiency of the boiler.

[0027] Furthermore, an observation port 41 and a flame-stirring door 42 are provided on one side of the furnace 4. The observation port 41 allows operators to observe the combustion situation inside the furnace 4 and adjust the combustion status in a timely manner; the flame-stirring door 42 allows operators to stir the fuel inside the furnace 4 to ensure complete combustion.

[0028] Furthermore, a front arch 43 is installed on one side of the upper part of the furnace 4, and a rear arch 44 is installed on the other side of the upper part of the furnace 4. The design of the front arch 43 and the rear arch 44 can improve combustion conditions, allowing the fuel to form a better combustion vortex in the furnace 4, improving combustion efficiency and reducing incomplete combustion losses.

[0029] Furthermore, a drain pipe 51 is connected to one end of the lower drum 5 to facilitate the periodic removal of dirt and sediment from the drum, keeping it clean. A water level gauge 61 is installed at one end of the upper drum 6 to monitor the water level in the drum in real time, ensuring the safe operation of the boiler. A main steam valve 62 is installed at the top of the upper drum 6 to control the steam output. A steam-water separator 63 is installed inside the upper drum 6 near the main steam valve 62 to separate steam and water droplets, improving the quality of the steam.

[0030] Furthermore, a soot blower 71 is installed inside the heat exchange chamber 7. The soot blower 71 includes a horizontal air supply pipe with several air jets installed at the bottom. The soot blower 71 can periodically blow away the accumulated dust on the surface of the heat exchange tubes, keeping the heat exchange tubes clean and improving heat exchange efficiency.

[0031] Furthermore, a platform ladder 10 is installed on the top of the furnace body 1 to facilitate the operation and maintenance of the boiler. An ash discharge pipe 15 is installed at the bottom of the heat exchange chamber 7, and an ash discharge port 16 is installed at the bottom of the ash discharge pipe 15. This design allows the ash and slag in the heat exchange chamber 7 to be discharged smoothly, keeping the heat exchange chamber 7 clean and operating efficiently.

[0032] In operation, the biomass water tube boiler of this invention, which facilitates ash removal, first feeds biomass fuel into the furnace 4 through the feeding hopper 3. The furnace 4, as the main combustion site, is rationally designed to ensure efficient combustion. The observation port 41 allows operators to easily observe the combustion process within the furnace 4 and adjust the combustion status promptly; the flame-dispensing door 42 facilitates the operator to move the fuel within the furnace 4, ensuring complete combustion. The design of the front arch 43 and rear arch 44 improves combustion conditions, allowing the fuel to form a better combustion vortex within the furnace 4, increasing combustion efficiency and reducing incomplete combustion losses.

[0033] The high-temperature flue gas generated by combustion in the furnace 4 enters the heat exchange chamber 7 through an opening on one side of the furnace wall 14. Several vertically arranged heat exchange tubes in the heat exchange chamber 7 are connected at their upper and lower ends to the upper boiler drum 6 and lower boiler drum 5, respectively, forming an effective heat transfer path. The high-temperature flue gas exchanges heat with the heat exchange tubes in the heat exchange chamber 7, transferring heat to the water inside the tubes, causing the water to evaporate and produce steam. The water-cooled wall 13 is installed on the inner wall of the furnace body 1, absorbing the high-temperature radiant heat from the furnace 4, protecting the furnace body 1 from the corrosion of the high-temperature flue gas, and simultaneously increasing the boiler's heating area and improving its thermal efficiency.

[0034] The steam generated inside the upper drum 6 is controlled by the main steam valve 62 for output. A water level gauge 61 is installed at one end of the upper drum 6 to monitor the water level in the drum in real time, ensuring the safe operation of the boiler. A steam-water separator 63 is installed inside the upper drum 6 near the main steam valve 62 to separate steam and water droplets, improving steam quality.

[0035] The flue gas after heat exchange is discharged from the boiler through flue gas duct 8. The economizer 9 installed at the outer end of flue gas duct 8 can recover and utilize the waste heat in the flue gas, thereby improving the thermal efficiency of the boiler.

[0036] An ash discharge port 11 is provided at the bottom of the furnace body 1 near the chain base 2, and an ash cleaning port 12 is provided on one side of the bottom of the furnace body 1. This facilitates the timely discharge of ash and slag from the furnace chamber 4 and the chain base 2, effectively preventing ash and slag accumulation and blockage. A soot blower 71 is installed inside the heat exchange chamber 7, including a horizontal air supply pipe and several air jets, which can periodically blow away the accumulated ash on the surface of the heat exchange tubes, keeping the heat exchange tubes clean and improving heat exchange efficiency. A drain pipe 51 is connected to one end of the lower boiler drum 5, facilitating the periodic discharge of dirt and sediment inside the drum and keeping the drum clean.

[0037] A platform ladder 10 is installed on the top of the furnace body 1 to facilitate the operation and maintenance of the boiler. The bottom of the heat exchange chamber 7 is equipped with an ash discharge pipe 15 and an ash discharge port 16, which allows the ash and slag in the heat exchange chamber 7 to be discharged smoothly, keeping the heat exchange chamber 7 clean and operating efficiently.

[0038] Finally, it should be noted that the electronic components in the energy-saving device 9 and other components in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order of each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A biomass water tube boiler that is easy to clean, comprising a boiler body (1), characterized in that: A chain base (2) is installed at the bottom of the furnace body (1). A feeding hopper (3) is installed at one end of the furnace body (1). A flue gas duct (8) is connected to the other end of the furnace body (1). A furnace chamber (4) is provided inside the furnace body (1) near the feeding hopper (3). An upper boiler drum (6) is installed above the inside of the furnace body (1). A lower boiler drum (5) is provided below the upper boiler drum (6). A heat exchange chamber (7) is provided above the inside of the furnace body (1). Several heat exchange tubes are vertically arranged inside the heat exchange chamber (7). The upper and lower ends of the heat exchange tubes are connected to the upper boiler drum (6) and the lower boiler drum (5) respectively. An energy saver (9) is installed at the outer end of the flue gas duct (8). A furnace wall (14) is provided between the furnace chamber (4) and the heat exchange chamber (7). One side of the furnace wall (14) is open.

2. The biomass water tube boiler with easy ash removal according to claim 1, characterized in that: The bottom of the furnace body (1) is provided with an ash discharge port (11) near the chain base (2), and a cleaning port (12) is provided on one side of the bottom of the furnace body (1).

3. The biomass water tube boiler with easy ash removal according to claim 1, characterized in that: The inner wall of the furnace body (1) is equipped with a water-cooled wall (13).

4. The biomass water tube boiler with easy ash removal according to claim 1, characterized in that: The furnace (4) is provided with a fire observation port (41) and a fire-starting door (42) on one side.

5. The biomass water tube boiler with easy ash removal according to claim 1, characterized in that: A front arch (43) is installed on one side of the upper part of the furnace (4), and a rear arch (44) is installed on the other side of the upper part of the furnace (4).

6. The biomass water tube boiler with easy ash removal according to claim 1, characterized in that: One end of the lower boiler drum (5) is connected to a drain pipe (51), one end of the upper boiler drum (6) is equipped with a water level gauge (61), the top of the upper boiler drum (6) is equipped with a main steam valve (62), and the interior of the upper boiler drum (6) near the main steam valve (62) is equipped with a steam-water separator (63).

7. The biomass water tube boiler with easy ash removal according to claim 1, characterized in that: The heat exchange chamber (7) is equipped with a soot blower (71), which includes a horizontal air supply pipe and several air jets installed at the bottom of the air supply pipe.

8. The biomass water tube boiler with easy ash removal according to claim 1, characterized in that: The furnace body (1) is equipped with a platform ladder (10) at the top, and the heat exchange chamber (7) is provided with an ash discharge pipe (15) at the bottom, and the ash discharge pipe (15) is provided with an ash discharge port (16) at the bottom.

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