Biomass hot water boiler facilitating sufficient heat exchange

Abstract

The utility model relates to the technical field of boilers, in particular to a biomass hot water boiler convenient for sufficient heat exchange, which comprises a boiler body, a boiler barrel mounted on the upper portion of the boiler body, a feeding hopper mounted at one end of the boiler body, a hearth arranged inside the boiler body, a front smoke box mounted outside one end of the boiler barrel, and flues arranged on the outer walls of two sides of the boiler barrel inside the boiler body. One end of the flue is communicated with the hearth, the other end of the flue is communicated with the front smoke box, a threaded smoke pipe is transversely installed in the boiler barrel, one end of the threaded smoke pipe is communicated with the front smoke box, and a smoke outlet is formed in the other end of the threaded smoke pipe. According to the biomass hot water boiler convenient for sufficient heat exchange, the boiler is efficient, energy-saving and safe in operation, a single-return-stroke threaded smoke pipe is arranged, light pipe water cooling walls are arranged on the left side and the right side of a hearth, and two symmetrical convection flues are arranged below the two sides of a boiler barrel; the problems of water circulation, tube plate cracks, drum lower part bulge, water cooling wall tube explosion, low heat efficiency, insufficient output, poor fuel adaptability and the like of a shell type boiler are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a biomass hot water boiler which is convenient for sufficient heat exchange. Background Art

[0002] Biomass hot water boiler is a thermal energy equipment that uses biomass energy as fuel. It is often used in the fields of heating and hot water. The hot water boiler and the entire heat network system are filled with water under normal circumstances and flow in one direction. When vaporization occurs, the gas is entrained by the water and flows together to form bubbles or steam columns. The gas contains CO2, O2, N2 and other gases that escape after being dissolved in water and heated, as well as water vapor generated by water vaporization. Due to the continuous vaporization and condensation, expansion and compression processes and the different directions of gas and water movement, gas plugs may form, or water hammer and vibration may be continuously caused, resulting in pipeline damage, leakage, abnormal operation of water pumps and water circulation failures, which will damage the normal operation of the boiler and the pipe network. In addition, there are problems such as the boiler heat exchange effect is not ideal, and there are problems such as incomplete fuel combustion and unsmooth flue gas emission. Utility Model Content

[0003] The purpose of the utility model is to provide a biomass hot water boiler that is easy to fully exchange heat, so as to solve the problems mentioned in the above background technology that due to the continuous vaporization and condensation, expansion and compression and the different directions of gas and water movement, gas plugs may be formed, or water hammer and vibration may be continuously caused, resulting in pipeline damage, leakage, abnormal operation of water pumps and water circulation failures, which will destroy the normal operation of boilers and pipe networks. In addition, there are still problems such as unsatisfactory boiler heat exchange effect, incomplete fuel combustion, and unsmooth flue gas emission.

[0004] To achieve the above-mentioned purpose, the utility model provides a biomass hot water boiler which is convenient for sufficient heat exchange, including a furnace body, a boiler drum is installed on the upper part of the furnace body, an upper hopper is installed at one end of the furnace body, a furnace is arranged inside the furnace body, a front smoke box is installed outside one end of the boiler drum, flues are arranged on the outer walls on both sides of the boiler drum inside the furnace body, one end of the flue is connected to the furnace, and the other end of the flue is connected to the front smoke box, a threaded smoke pipe is installed horizontally inside the boiler drum, one end of the threaded smoke pipe is connected to the front smoke box, and the other end is provided with a smoke outlet.

[0005] Preferably, one end of the furnace body is connected to a water return pipe, the water return pipe is connected to the boiler drum through a pipeline, and the inner wall of the furnace body is installed with a water-cooling pipe wall.

[0006] Preferably, a maintenance platform is installed on the top of one side of the furnace body, and an escalator is installed on the bottom of one side of the maintenance platform.

[0007] Preferably, a slag discharger is installed on one side outer wall of the furnace body.

[0008] Preferably, a sewage pipe is connected to the bottom of one end of the boiler drum, and arched tube sheets are provided at both ends of the boiler drum, and the arched tube sheets are tightly welded and fixed to the boiler drum.

[0009] Preferably, the top of the boiler drum is connected to a steam collecting tank, and one side of the steam collecting tank is connected to a hot water outlet pipe.

[0010] Preferably, a front arch is provided at one end of the furnace, a rear arch is provided at the other end inside the furnace, an opening is provided between the front arch and the rear arch, and a grate is installed at the bottom of the furnace.

[0011] Preferably, a fire door is installed on one side outer wall of the grate.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The biomass hot water boiler, which is convenient for full heat exchange, makes the boiler efficient, energy-saving and safe to operate. It adopts a single-drum longitudinal layout with an arched tube sheet, and a single-return threaded smoke pipe is arranged in the drum. The left and right sides of the furnace are equipped with smooth tube water-cooled walls, and there are two symmetrical convection flues under the two sides of the drum. The problems of water circulation in shell boilers, tube sheet cracks, bulging at the bottom of the drum, bursting of water-cooled walls, low thermal efficiency, insufficient output, and poor fuel adaptability are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a side view structural schematic diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of the top structure of the utility model.

[0017] The meaning of each number in the figure is:

[0018] 1. Furnace body; 11. Return water pipe; 12. Water-cooled tube wall; 13. Flue; 2. Boiler drum; 21. Drain pipe; 22. Arched tube plate; 23. Steam collecting tank; 24. Hot water outlet pipe; 25. Threaded smoke pipe; 251. Smoke outlet; 3. Furnace; 31. Front arch; 32. Rear arch; 33. Grate; 34. Fire door; 4. Upper hopper; 5. Front smoke box; 6. Slag discharger; 7. Maintenance platform. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The utility model provides a biomass hot water boiler which is convenient for sufficient heat exchange, such as Figure 1-Figure 3 As shown, it includes a furnace body 1, a boiler drum 2 is installed on the upper part of the furnace body 1, and an upper hopper 4 is installed at one end of the furnace body 1 to facilitate the addition of biomass fuel. A furnace 3 is arranged inside the furnace body 1 for burning fuel. A front smoke box 5 is installed outside one end of the boiler drum 2, so that the flue gas can be better discharged from the flue 13, avoiding the accumulation of flue gas inside the boiler, and improving the heat exchange efficiency of the boiler. Flue ducts 13 are arranged on the outer walls of both sides of the boiler drum 2 inside the furnace body 1, one end of the flue 13 is connected with the furnace 3, so that the flue gas can be better discharged from the flue 13, avoiding the accumulation of flue gas inside the boiler, and improving the heat exchange efficiency of the boiler. The other end of the flue 13 is connected with the front smoke box 5, and a threaded smoke pipe 25 is installed laterally inside the boiler drum 2 for heat exchange with water in the boiler drum 2 to heat the water. One end of the threaded smoke pipe 25 is connected with the front smoke box 5, and the other end is provided with a smoke outlet 251 for discharging the smoke after heat exchange.

[0021] In this embodiment, a return pipe 11 is connected to one end of the furnace body 1 , and the return pipe 11 is connected to the boiler drum 2 through a pipeline. A water-cooled pipe wall 12 is installed on the inner wall of the furnace body 1 for returning heated water into the furnace body 1 .

[0022] Specifically, a maintenance platform 7 is installed on the top of one side of the furnace body 1, and an escalator is installed on the bottom of one side of the maintenance platform 7 to facilitate maintenance operations.

[0023] Furthermore, a slag discharger 6 is installed on one side outer wall of the furnace body 1 for discharging waste slag.

[0024] Furthermore, a sewage pipe 21 is connected to the bottom of one end of the drum 2, and an arched tube sheet 22 is provided at both ends of the drum 2. The arched tube sheet 22 is tightly welded and fixed to the drum 2, so that the drum 2 is changed from a quasi-rigid body to a quasi-elastic body structure, and the tensioning parts in the tube sheet area are eliminated, reducing stress. The smoke pipe in the tube sheet is changed from two returns to a single return, solving the problem of tube sheet cracks.

[0025] Furthermore, a steam collecting tank 23 is connected to the top of the boiler drum 2, and a hot water outlet pipe 24 is connected to one side of the steam collecting tank 23 for discharging hot water.

[0026] Furthermore, a front arch 31 is provided at one end of the furnace 3, a rear arch 32 is provided at the other end of the furnace 3, an opening is provided between the front arch 31 and the rear arch 32, and a grate 33 is installed at the bottom of the furnace 3 for combustion.

[0027] Furthermore, a fire-stirring door 34 is installed on one side outer wall of the grate 33 for opening to perform a fire-stirring operation.

[0028] When the utility model is used, the biomass hot water boiler that is convenient for sufficient heat exchange can first be added to the furnace 3 by the operator through the upper hopper 4. In the furnace 3, the biomass fuel is burned, and the heat generated is transferred to the front smoke box 5 through the flue 13, and then heat is exchanged through the threaded smoke pipe 25. In the threaded smoke pipe 25, the heat is transferred to the water in the boiler drum 2 to heat the water. The flue gas after heat exchange is discharged from the smoke outlet 251. The heated water is discharged through the hot water outlet pipe 24 on one side of the steam collecting tank 23 for use, and the used water enters the boiler drum 2 through the return water pipe 11 for reheating. The waste slag of the furnace body 1 is discharged through the slag discharger 6. On the maintenance platform 7, the operator can inspect and maintain the equipment.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A biomass hot water boiler that facilitates sufficient heat exchange, comprising a furnace body (1), characterized in that: A boiler drum (2) is installed on the upper part of the furnace body (1), an upper hopper (4) is installed at one end of the furnace body (1), a furnace (3) is arranged inside the furnace body (1), a front smoke box (5) is installed outside one end of the boiler drum (2), flues (13) are arranged on the outer walls of both sides of the boiler drum (2) inside the furnace body (1), one end of the flue (13) is connected to the furnace (3), and the other end of the flue (13) is connected to the front smoke box (5), a threaded smoke pipe (25) is installed transversely inside the boiler drum (2), one end of the threaded smoke pipe (25) is connected to the front smoke box (5), and the other end is provided with a smoke outlet (251).

2. The biomass hot water boiler for sufficient heat exchange according to claim 1 is characterized in that: One end of the furnace body (1) is connected to a water return pipe (11), the water return pipe (11) is connected to the boiler drum (2) through a pipeline, and a water cooling pipe wall (12) is installed on the inner wall of the furnace body (1).

3. The biomass hot water boiler for sufficient heat exchange according to claim 1 is characterized in that: A maintenance platform (7) is installed on the top of one side of the furnace body (1), and an escalator is installed on the bottom of one side of the maintenance platform (7).

4. The biomass hot water boiler for sufficient heat exchange according to claim 1 is characterized in that: A slag discharger (6) is installed on one side outer wall of the furnace body (1).

5. The biomass hot water boiler for sufficient heat exchange according to claim 1 is characterized in that: A sewage pipe (21) is connected to the bottom of one end of the boiler drum (2), and arched tube sheets (22) are provided at both ends of the boiler drum (2), and the arched tube sheets (22) are tightly welded and fixed to the boiler drum (2).

6. The biomass hot water boiler for sufficient heat exchange according to claim 1 is characterized in that: The top of the boiler drum (2) is connected to a steam collecting tank (23), and one side of the steam collecting tank (23) is connected to a hot water outlet pipe (24).

7. The biomass hot water boiler for sufficient heat exchange according to claim 1 is characterized in that: A front arch (31) is provided at one end of the furnace (3), a rear arch (32) is provided at the other end inside the furnace (3), an opening is provided between the front arch (31) and the rear arch (32), and a grate (33) is installed at the bottom of the furnace (3).

8. The biomass hot water boiler for sufficient heat exchange according to claim 7 is characterized in that: A fire door (34) is installed on one side outer wall of the grate (33).

Images