Spiral tubular waste heat boiler

Abstract

The utility model discloses a spiral through-flow type waste heat boiler which comprises a boiler body and a spiral heat exchange assembly, a smoke inlet is formed in one side of the side face of the boiler body, and a smoke outlet is formed in the other side of the side face of the boiler body. The spiral heat exchange assembly is installed in the boiler body, a high-temperature steam outlet is formed in the top of the spiral heat exchange assembly, a water inlet is formed in the bottom of the spiral heat exchange assembly, the spiral heat exchange assembly and the boiler body are matched to form a spiral flue gas channel for flue gas circulation, and the spiral flue gas channel is communicated with the flue gas inlet and the flue gas outlet. According to the utility model, high-temperature flue gas waste heat discharged by the biomass burner is effectively converted into available steam, so that the energy waste is reduced, the energy utilization efficiency is improved, and meanwhile, the operation cost is reduced; the compact design is suitable for small wood processing factories with limited space, excessive production areas are not occupied, and it is ensured that the steam supply amount is flexibly adjusted according to production requirements through quick starting and response capacity; and in addition, the internal structure is simplified due to the spiral tubular structure, so that the equipment is easy to maintain, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of through-flow boilers, in particular to a spiral through-flow waste heat boiler. Background Art

[0002] Among them, biomass burners are a type of boiler, which generates heat by burning biomass fuel and converts the heat for use; when wood processing plants process wood, boilers are used for heating in steam heating or hot pressing processes. Steam heating is a method of using steam heating to improve the drying efficiency and quality of wood. In this case, steam needs to be generated by biomass burners; and the hot pressing process is when making artificial boards, which usually requires bonding multiple layers of materials together and curing them under high temperature and high pressure conditions. In this process, steam or hot water provided by biomass burners is often used as a heating medium.

[0003] Because only some of the processing procedures in the wood mill use boilers, small biomass burners are usually used. When the small biomass burners are working, the high-temperature flue gas generated is directly discharged into the atmosphere after filtering, and the residual heat of the high-temperature flue gas is wasted. However, the existing waste heat boilers used for biomass burners have the problems of high cost and slow heat exchange rate. Utility Model Content

[0004] In view of the shortcomings of existing waste heat boilers, such as high cost and slow heat exchange rate for biomass burners, the utility model provides a spiral cross-flow waste heat boiler with low manufacturing cost and high and rapid heat exchange efficiency.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A spiral cross-flow waste heat boiler comprises a furnace body and a spiral heat exchange component, wherein a flue gas inlet is provided on one side of two opposite sides of the furnace body, and a flue gas outlet is provided on the other side; the spiral heat exchange component is installed in the furnace body, and a high-temperature steam outlet connected to the outside of the furnace body is provided on the top of the spiral heat exchange component, and a water inlet connected to the outside of the furnace body is provided on the bottom, and the spiral heat exchange component cooperates with the furnace body to form a spiral flue gas channel for flue gas circulation, wherein one end of the spiral flue gas channel is connected to the flue gas inlet, and the other end of the spiral flue gas channel is connected to the flue gas outlet.

[0007] Furthermore, a filter screen can be detachably mounted on the flue gas inlet of the furnace body. The detachable filter screen can preliminarily filter large dust particles in the flue gas, thereby reducing pollution inside the furnace body and further reducing the thermal resistance of the heating surface inside the furnace body.

[0008] Furthermore, the spiral heat exchange assembly includes an upper header, a lower header and a plurality of heated water pipes, the lower header is an annular box structure, wherein the upper end of each heated water pipe is connected to the upper header and the lower end is connected to the lower header; the upper header is fixedly installed above the inside of the furnace body, and the lower header is fixedly installed below the inside of the furnace body, wherein the high-temperature steam outlet is arranged on the upper header, and the water inlet is arranged on the side of the lower header. During operation, water enters the lower header through the water inlet on its side and is then distributed to the various heat exchange pipes connected to it. As it flows through the heated water pipes, the water medium exchanges heat with the high-temperature flue gas within the furnace, heating and vaporizing it. This heat is then gathered to form high-temperature steam, which flows out of the high-temperature steam outlet of the upper header. The lower header adopts an annular structure, which makes the entire heat exchange assembly more compact and occupies less space. This makes the spiral cross-flow waste heat boiler suitable for boiler rooms with limited space, saving initial investment. The upper header is located above the furnace body, while the lower header is located below. This layout promotes natural water circulation in the boiler, ensuring reliable cooling of the heat exchange system even without an external pump. The upper header consists of two centrally symmetrical curved boxes that intersect at their centers to form an annular channel.

[0009] Furthermore, a water level gauge is connected between the upper and lower headers. The water level gauge allows workers to visually observe the water level fluctuation between the upper and lower water tanks, thereby preventing dry heating due to lack of water in the heated pipes. This facilitates use and extends the service life of the device.

[0010] Furthermore, fins are connected between each pair of heated water pipes. The fins increase the heat exchange area and transfer heat to the heated water pipes after heat exchange, increasing the heating speed of the heated water pipes, allowing the water inside to evaporate quickly and improving the heat exchange effect of the furnace body.

[0011] Furthermore, a water pump is installed at the end of the water inlet, and the water inlet of the water pump is connected to the water outlet pipe of the factory water treatment equipment. The water pump can ensure that water flows into the spiral heat exchange component at a stable flow rate and pressure, thereby continuously and stably supplying water to the spiral heat exchange component.

[0012] Furthermore, an external steam separator is installed at the high-temperature steam outlet. The separator's air inlet is connected to the high-temperature steam outlet, while its air outlet is connected to the factory's steam equipment pipelines. The separator separates the discharged high-temperature steam, separating the steam-water mixture. High-temperature saturated steam enters the factory's steam equipment pipelines, while water flows back into the lower header. The separator effectively removes moisture from the steam, increasing its dryness and providing high-quality saturated steam to the factory's steam equipment.

[0013] Furthermore, a pipe connected to the spiral flue gas passage inside the furnace body is provided at the outlet of the steam-water separator, and a switch is provided on the pipe. The pipe is connected to an exhaust fan or a high-pressure air line. When in use, the switch is turned on, and gas enters the spiral passage, blowing away dust in the heated water pipe inside the spiral passage, thereby removing dust adsorbed inside the spiral passage. By regularly blowing away dust accumulated inside the spiral passage with gas, the problem of reduced heat conduction efficiency caused by dust accumulation can be reduced, helping to maintain the optimal heat transfer state of the equipment, thereby improving heat energy utilization efficiency and overall production efficiency. At the same time, removing dust adsorbed inside the spiral passage can avoid problems such as poor heat transfer caused by long-term dust accumulation, helping to extend the service life of the furnace body and its related components.

[0014] Directions:

[0015] The high-temperature flue gas outlet emitted by the biomass burner is connected to the flue gas inlet of the furnace body, the high-temperature steam outlet of the spiral heat exchange component is connected to the steam equipment pipeline of the factory, and the water inlet is connected to the water outlet pipeline of the water treatment device of the factory; when the spiral cross-flow waste heat boiler is used, water is first added to the spiral heat exchange pipe through the water inlet pipeline, and the high-temperature flue gas emitted by the biomass burner flows along the spiral flue gas channel, and finally the flue gas flows to the smoke outlet pipe and is discharged outward. During the flow of the high-temperature flue gas, the spiral heat exchange component contacts the high-temperature flue gas and exchanges heat, while heating the water in the heat exchange component. In the spiral heat exchange component, the water is heated and evaporated to form high-temperature steam. The high-temperature steam leaves the boiler along the high-temperature steam outlet and enters the steam equipment pipeline of the factory, which is convenient for the use of the steam equipment.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] 1. This utility model effectively converts the waste heat of high-temperature flue gas emitted by the biomass burner into usable steam, reducing energy waste, significantly improving energy utilization efficiency, and reducing operating costs. Its compact design is particularly suitable for small wood processing plants with limited space, and it does not occupy too much production area. Its rapid start-up and response capabilities ensure that the steam supply can be flexibly adjusted according to production needs. In addition, the spiral cross-flow structure simplifies the internal structure, making the equipment easy to maintain and extending its service life.

[0018] 2. The spiral heat exchange component of the utility model adopts a spiral structure, which not only increases the contact area with the high-temperature flue gas, but also saves equipment space and is easy to install and use; at the same time, the upper header is located above the inside of the furnace body, and the lower header is located below. This layout helps to form a natural water circulation of the boiler; the water level gauge allows the staff to intuitively observe the water level fluctuation between the upper water tank and the lower water tank, which can avoid dry burning due to lack of water in the heated pipe; the fins increase the heat exchange area, increase the heating speed of the hot water exchange pipe, and realize the rapid heating and evaporation of the internal water, thereby improving the heat exchange effect of the furnace body.

[0019] 3. The detachable filter of the utility model can preliminarily filter the large particles of dust in the flue gas, which can reduce the thermal resistance inside the furnace body; the water pump installed at the end of the water inlet can ensure that the water flows into the spiral heat exchange component at a stable flow rate and pressure, and can continuously and stably supply water to the spiral heat exchange component; the steam-water separator can effectively remove moisture from the steam and improve the dryness of the steam, thereby providing high-quality saturated steam to the factory's steam-using equipment; the pipeline can be connected to an exhaust fan or a high-pressure air pipeline to blow away the dust in the heated water pipe inside the spiral channel, which can remove the dust adsorbed inside the spiral pipe and reduce internal dust accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main structure of a spiral cross-flow waste heat boiler.

[0021] Figure 2 The diagram is a cross-sectional structural diagram of a spiral cross-flow waste heat boiler from the main viewing angle.

[0022] Figure 3 It is a left-side structural diagram of a spiral cross-flow waste heat boiler.

[0023] Figure 4 It is a schematic diagram of the top view of the spiral cross-flow waste heat boiler.

[0024] Figure ID:

[0025] Furnace body—1, flue gas inlet—11, flue gas outlet—12, filter—13, heat exchange component—2, high-temperature steam outlet—21, water inlet—22, upper header—23, lower header—24, heated water pipe—25, water level gauge—3, water pump—4, steam-water separator—5, pipeline—6. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Example 1: A spiral cross-flow waste heat boiler includes a furnace body 1 and a spiral heat exchange component 2, wherein a flue gas inlet 11 is provided on one side of two opposite sides of the furnace body 1, and a flue gas outlet 12 is provided on the other side; the spiral heat exchange component 2 is installed in the furnace body 1, and a high-temperature steam outlet 21 connected to the outside of the furnace body 1 is provided on the top of the spiral heat exchange component 2, and a water inlet 22 connected to the outside of the furnace body 1 is provided on the bottom, and the spiral heat exchange component 2 cooperates with the furnace body 1 to form a spiral flue gas channel for flue gas circulation, wherein one end of the spiral flue gas channel is connected to the flue gas inlet 11, and the other end of the spiral flue gas channel is connected to the flue gas outlet 12.

[0028] The high-temperature flue gas outlet 12 emitted by the biomass burner is connected to the flue gas inlet 11 of the furnace body 1, the high-temperature steam outlet 21 of the spiral heat exchange component 2 is connected to the steam equipment pipeline of the factory, and the water inlet 22 is connected to the water outlet pipeline of the water treatment device of the factory; when the spiral cross-flow waste heat boiler is in use, water is first added to the spiral heat exchange pipe through the water inlet pipeline, and the high-temperature flue gas emitted by the biomass burner flows along the spiral flue gas channel, and finally the flue gas flows to the smoke outlet pipe and is discharged outward. During the flow of the high-temperature flue gas, the spiral heat exchange component 2 contacts the high-temperature flue gas and exchanges heat, and at the same time heats the water in the heat exchange component 2. In the spiral heat exchange component 2, the water is heated and evaporated to form high-temperature steam. The high-temperature steam leaves the boiler along the high-temperature steam outlet 21 and enters the steam equipment pipeline of the factory, which is convenient for the use of the steam equipment.

[0029] Example 2: The difference from Example 1 is that a filter 13 is detachably mounted on the flue gas inlet 11 of the furnace body 1. The detachable filter 13 can initially filter large dust particles in the flue gas, thereby reducing pollution inside the furnace body 1 and further reducing the thermal resistance of the heating surface inside the furnace body 1.

[0030] The spiral heat exchange assembly 2 includes an upper header 23, a lower header 24 and a plurality of heated water pipes 25. The lower header 24 is an annular box structure, wherein the upper end of each heated water pipe 25 is connected to the upper header 23 and the lower end is connected to the lower header 24; the upper header 23 is fixedly installed above the interior of the furnace body 1, and the lower header 24 is fixedly installed below the interior of the furnace body 1, wherein the high-temperature steam outlet 21 is arranged on the upper header 23, and the water inlet 22 is arranged on the side of the lower header 24. During use, water enters the lower header 24 from the water inlet 22 on the side of the lower header 24, and the entered water is then distributed to the various hot water exchange pipes connected to the lower header 24. In the process of flowing in the hot water pipes 25, the water medium exchanges heat with the high-temperature flue gas in the furnace body 1, thereby being heated and vaporized, and gathered to form high-temperature steam, which flows out from the high-temperature steam outlet 21 of the upper header 23; the lower header 24 adopts an annular structure. This design makes the entire heat exchange component 2 more compact and occupies less space, making the spiral cross-flow waste heat boiler suitable for boiler rooms in limited spaces, saving initial investment; at the same time, the upper header 23 is located above the inside of the furnace body 1, and the lower header 24 is located below. This layout helps to form a natural water circulation in the boiler, and can ensure reliable cooling of the heat exchange system even in the absence of an external pump.

[0031] The upper header 23 includes two centrally symmetrical arc-shaped boxes, which intersect at their centers to form an annular channel.

[0032] A water pump 4 is also installed at the end of the water inlet 22. The water inlet end of the water pump 4 is connected to the water outlet pipe of the factory water treatment equipment. The water pump 4 ensures that water flows into the spiral heat exchange component 2 at a stable flow rate and pressure, thereby continuously and stably supplying water to the spiral heat exchange component 2.

[0033] Example 3: This differs from Example 2 in that a water level gauge 3 is connected between the upper header 23 and the lower header 24. This gauge allows operators to visually observe water level fluctuations between the upper and lower water tanks, preventing dry heating due to a lack of water in the heated tubes. This facilitates use and extends the life of the device.

[0034] Fins are also connected between the two heated water pipes 25. The fins increase the heat exchange area, transfer heat to the heated water pipe after heat exchange, increase the heating speed of the heated water pipe, and realize rapid evaporation of the water inside, thereby improving the heat exchange effect of the furnace body 1.

[0035] An external steam separator 5 is also installed at the high-temperature steam outlet 21. The inlet end of the separator 5 is connected to the high-temperature steam outlet 21, and the outlet end is connected to the factory's steam equipment pipelines. The separator 5 separates the discharged high-temperature steam, separating the steam-water mixture. The high-temperature saturated steam enters the factory's steam equipment pipelines, while the water flows back to the lower header 24. The separator 5 effectively removes moisture from the steam, improving the steam dryness and providing high-quality saturated steam to the factory's steam equipment.

[0036] A pipe 6 is also provided at the outlet of the steam-water separator 5, communicating with the spiral flue gas passage within the furnace body 1. A switch is provided on the pipe 6. Pipe 6 is connected to an exhaust fan or high-pressure air line. When the switch is turned on, gas enters the spiral passage, sweeping away dust from the heated water pipe 25 within the spiral passage, thereby removing dust adsorbed within the spiral pipe 6. Regularly sweeping away dust accumulated within the spiral passage can reduce the decline in heat conduction efficiency caused by dust accumulation, helping to maintain the optimal heat transfer state of the equipment, thereby improving thermal energy utilization efficiency and overall production efficiency. Furthermore, removing dust adsorbed within the spiral pipe 6 can avoid problems such as poor heat transfer caused by long-term dust accumulation, thereby extending the service life of the furnace body 1 and its related components.

[0037] In the specification of the present invention, a large number of specific details are described. However, it is understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A spiral tubular waste heat boiler, characterized by: The invention comprises a furnace body (1) and a spiral heat exchange component (2), wherein one side of two opposite sides of the furnace body (1) is provided with a smoke inlet (11), and the other side is provided with a smoke outlet (12); the spiral heat exchange component (2) is installed in the furnace body (1), the top of the spiral heat exchange component (2) is provided with a high-temperature steam outlet (21) connected to the outside of the furnace body (1), and the bottom is provided with a water inlet (22) connected to the outside of the furnace body (1), and the spiral heat exchange component (2) and the furnace body (1) cooperate to form a spiral smoke channel for smoke circulation, wherein one end of the spiral smoke channel is connected to the smoke inlet (11), and the other end of the spiral smoke channel is connected to the smoke outlet (12).

2. The spiral cross-flow waste heat boiler according to claim 1, characterized in that: A filter screen (13) is detachably mounted on the flue gas inlet (11) of the furnace body (1).

3. The spiral tubular waste heat boiler according to any one of claims 1 or 2, characterized in that: The spiral heat exchange assembly (2) comprises an upper header (23), a lower header (24) and a plurality of heated water pipes (25), wherein the lower header (24) is an annular box structure, wherein the upper end of each heated water pipe (25) is connected to the upper header (23), and the lower end is connected to the lower header (24); the upper header (23) is fixedly installed above the interior of the furnace body (1), and the lower header (24) is fixedly installed below the interior of the furnace body (1), wherein the high-temperature steam outlet (21) is arranged on the upper header (23), and the water inlet (22) is arranged on the side of the lower header (24).

4. The spiral through-flow waste heat boiler according to claim 3, characterized in that: A water level gauge (3) is connected between the upper header (23) and the lower header (24).

5. The spiral cross-flow waste heat boiler according to claim 3, characterized in that: Fins are also connected between the two heated water pipes (25).

6. The spiral through-flow waste heat boiler according to claim 1, characterized in that: A water pump (4) is also installed at the end of the water inlet (22), and the water inlet end of the water pump (4) is connected to the water outlet pipeline of the factory water treatment equipment.

7. The spiral cross-flow waste heat boiler according to claim 1, characterized in that: An external steam-water separator (5) is also installed at the high-temperature steam outlet (21), and the air inlet end of the steam-water separator (5) is connected to the high-temperature steam outlet (21), and the air outlet end is connected to the steam equipment pipeline of the factory.

8. The spiral cross-flow waste heat boiler according to claim 7, characterized in that: A pipe (6) communicating with the spiral flue gas passage inside the furnace body (1) is further provided at the outlet of the steam-water separator (5), and a switch is provided on the pipe (6).

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