Flue gas waste heat recovery device of biomass furnace

Abstract

The utility model relates to the technical field of waste heat recovery devices, and provides a biomass furnace flue gas waste heat recovery device which comprises a flue gas heat exchanger, a partition plate is installed at the bottom of an inner cavity of the flue gas heat exchanger and divides the inner cavity of the flue gas heat exchanger into a high-temperature cavity and a low-temperature cavity, and the high-temperature cavity is communicated with a biomass furnace through a high-temperature flue gas pipe. Heat pipes are arranged in the high-temperature cavity and the low-temperature cavity, one ends of the heat pipes are arranged in the high-temperature cavity and the low-temperature cavity, the other ends of the heat pipes extend to a high-temperature water tank and a low-temperature water tank, the high-temperature water tank is communicated with a heating water inlet pipeline through a high-temperature pipeline, and the low-temperature water tank is communicated with a heating water return pipe through a low-temperature pipeline; the high-temperature water tank communicates with the low-temperature water tank through an overflow pipe, and the bottom of the flue gas heat exchanger further communicates with a condensate water waste discharge assembly. According to the flue gas heat exchanger, secondary heat exchange of flue gas can be achieved, the heat exchange efficiency is improved, meanwhile, smoke dust accumulation can be reduced, and long-time efficient operation of equipment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery devices, in particular to a biomass furnace flue gas waste heat recovery device. Background Art

[0002] Flue gas is the main way for general energy-consuming equipment to waste energy. For example, boiler exhaust consumes about 15% of energy, while other equipment such as setting machines, dryers and kilns in the printing and dyeing industry mainly consume energy through flue gas emissions. Flue gas waste heat recovery mainly converts the heat carried by the flue gas into usable heat through some kind of heat exchange method.

[0003] There are many types of flue gas waste heat recovery devices at present, for example, patent number CN200620052188.5, patent name is a Chinese utility model patent for a flue gas waste heat recovery device, which includes a heat pipe, a heat exchange chamber, the heat exchange chamber is arranged at the upper part of the flue, the heat exchange chamber is filled with heat transfer oil, one end of the heat pipe is inserted in the flue, and the other end is inserted in the heat exchange chamber, the heat pipe is filled with high-temperature or low-temperature medium, a plurality of steam serpentine heat exchangers are arranged in the heat exchange chamber, the water inlet ends of the plurality of steam serpentine heat exchangers are connected to a water distributor, and the steam outlet ends are connected to a steam collector, and the heat pipes inserted in the heat exchange chamber are arranged on both sides of the steam serpentine heat exchanger. At a certain distance, the serpentine tube is several times longer than the straight tube. The water is heated for a long time inside and the steam generation efficiency is high. The middle section of the serpentine tube is a straight tube. The distance between the heat pipe and the steam straight tube is uniform, the heat exchange is good, the straight tube pressure is uniform, the tube body will not deform or crack, the pressure will not be lost, and the heat exchange capacity is large; the elbows at both ends of the tube body have small curvature, and the pressure loss is much smaller than the coil. Although the above structure can realize flue gas waste heat recovery, the structure of the steam serpentine tube heat exchanger is prone to serious dust accumulation, reduced heat exchange efficiency, and easy corrosion when used for a long time, and cannot work for a long time. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a biomass furnace flue gas waste heat recovery device, which can realize secondary heat exchange of flue gas and improve the heat exchange efficiency. At the same time, it can reduce smoke accumulation and ensure long-term efficient operation of the equipment.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A biomass stove flue gas waste heat recovery device comprises a flue gas heat exchanger, a partition is installed at the bottom of the inner cavity of the flue gas heat exchanger, the partition divides the inner cavity of the flue gas heat exchanger into a high-temperature cavity and a low-temperature cavity, the high-temperature cavity is connected to the smoke exhaust port of the biomass stove through a high-temperature smoke pipe, and the low-temperature cavity is connected to the smoke external exhaust port through a low-temperature smoke pipe. A plurality of heat pipes are arranged and installed in the high-temperature cavity and the low-temperature cavity, one end of the heat pipe is arranged in the high-temperature cavity and the low-temperature cavity, and the other end passes through the side wall of the flue gas heat exchanger and extends to a high-temperature water tank and a low-temperature water tank respectively, the high-temperature water tank is connected to a heating water inlet pipe through a high-temperature pipe, and the low-temperature water tank is connected to a heating water return pipe through a low-temperature pipe, the high-temperature water tank and the low-temperature water tank are connected through an overflow pipe, and the bottom of the flue gas heat exchanger is also connected to a condensate discharge component.

[0007] As an improved technical solution, the partition is arranged in the middle position of the inner cavity of the flue gas heat exchanger, the bottom of the partition is fixedly connected to the bottom of the inner cavity of the flue gas heat exchanger, and a flow gap is provided between the top of the partition and the top of the inner cavity of the flue gas heat exchanger, the flow gap connects the high-temperature cavity and the low-temperature cavity, and the high-temperature cavity, the flow gap and the low-temperature cavity together form a U-shaped cavity structure.

[0008] As an improved technical solution, a circulating water pump and a water inlet valve are installed on the low-temperature pipeline, and a water outlet valve is installed on the high-temperature pipeline.

[0009] As an improved technical solution, the condensate discharge assembly includes a condensate discharge pipe, which has a Y-shaped structure and has two input ends and one output end. The two input ends of the condensate discharge pipe are respectively connected to the bottom of the high-temperature chamber and the low-temperature chamber, and a condensate discharge valve is installed on the output end of the condensate discharge pipe.

[0010] As an improved technical solution, an observation port is also installed on the flue gas heat exchanger, and the observation port is arranged on the top of the flue gas heat exchanger.

[0011] As an improved technical solution, the heat pipe adopts a high-temperature resistant glass tube, the heat pipe is installed obliquely on the side wall of the flue gas heat exchanger, and the angle between the heat pipe and the side wall of the flue gas heat exchanger is 75°-85°, and the medium in the heat pipe is water or ethanol.

[0012] As an improved technical solution, the inner cavity side wall of the flue gas heat exchanger and the surface of the partition are covered with an anti-corrosion layer.

[0013] As an improved technical solution, the heating water inlet pipe is connected to the input end of the heating device in the biomass furnace, the output end of the heating device in the biomass furnace is connected to the heating water outlet pipe, the heating water outlet pipe is connected to the input end of the heating carrier, and the output end of the heating carrier is connected to the heating return pipe and the heating water inlet pipe.

[0014] After adopting the above technical solution, the beneficial effects of the utility model are:

[0015] A partition is installed at the bottom of the inner cavity of the flue gas heat exchanger, and the partition divides the inner cavity of the flue gas heat exchanger into a high-temperature cavity and a low-temperature cavity. The high-temperature cavity is connected to the exhaust port of the biomass furnace through a high-temperature flue gas pipe, and the low-temperature cavity is connected to the flue gas exhaust port through a low-temperature flue gas pipe. A number of heat pipes are arranged and installed in the high-temperature cavity and the low-temperature cavity. One end of the heat pipe is arranged in the high-temperature cavity and the low-temperature cavity, and the other end passes through the side wall of the flue gas heat exchanger and extends to the high-temperature water tank and the low-temperature water tank respectively. The high-temperature water tank is connected to the heating water inlet pipe through a high-temperature pipe, and the low-temperature water tank is connected to the heating water return pipe through a low-temperature pipe. The high-temperature water tank and the low-temperature water tank are connected through an overflow pipe. The inner cavity of the flue gas heat exchanger can be divided into a high-temperature cavity and a low-temperature cavity by a partition. By arranging heat pipes in the high-temperature cavity and the low-temperature cavity, when the flue gas discharged from the biomass furnace passes through the high-temperature cavity and the low-temperature cavity, the heat pipes will absorb the heat of the flue gas and transfer it to the high-temperature water tank and the low-temperature water tank, thereby realizing secondary heat exchange of the flue gas and improving the heat exchange efficiency of the flue gas. The bottom of the flue gas heat exchanger is also connected to a condensed water discharge component. The condensed water generated during the flue gas heat exchange will accumulate at the bottom of the flue gas heat exchanger with the smoke dust. The condensed water can be discharged together with the smoke dust through the condensed water discharge component, thereby reducing the accumulation of smoke dust and ensuring that the equipment can operate for a long time.

[0016] A flow gap is provided between the top of the partition and the top of the inner cavity of the flue gas heat exchanger. The flow gap connects the high temperature cavity and the low temperature cavity. The high temperature cavity, the flow gap and the low temperature cavity together form a U-shaped cavity structure. Through the design of the U-shaped cavity structure, the length and time of flue gas heat exchange in the flue gas heat exchanger are extended, so that the flue gas can fully exchange heat with the heat pipe, improve the flue gas waste heat recovery rate, and reduce the heat loss of biomass furnace exhaust smoke;

[0017] The heat pipe adopts high temperature resistant glass tube. By adopting glass material, the heat pipe is not easy to be corroded without reducing the heat exchange efficiency, and dust is not easy to adhere to the surface, so that the biomass furnace flue gas waste heat recovery device can work for a long time, effectively improving the heat exchange efficiency. By installing the heat pipe obliquely on the side wall of the flue gas heat exchanger, it is beneficial to fully exchange heat between the flue gas and the medium in the heat pipe, thereby improving the heat exchange efficiency.

[0018] The inner cavity side walls of the flue gas heat exchanger and the surface of the partition are covered with an anti-corrosion layer. The anti-corrosion layer is used to enhance the corrosion resistance of the flue gas heat exchanger and the partition and extend the service life. At the same time, the anti-corrosion layer covered on the partition can also increase the flue gas flow rate.

[0019] In summary, the utility model provides a biomass furnace flue gas waste heat recovery device, which can realize secondary heat exchange of flue gas and improve the heat exchange efficiency. At the same time, it can reduce smoke accumulation and ensure long-term and efficient operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In addition, in the drawings, the components or parts are not necessarily drawn according to the actual scale.

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the flue gas heat exchanger in the utility model;

[0023] Reference numerals:

[0024] 1. Flue gas heat exchanger, 2. Partition, 3. High temperature cavity, 4. Low temperature cavity, 5. High temperature flue gas pipe, 6. Biomass furnace, 7. Low temperature flue gas pipe, 8. Heat pipe, 9. High temperature water tank, 10. Low temperature water tank, 11. High temperature pipeline, 12. Heating water inlet pipeline, 13. Low temperature pipeline, 14. Heating return pipe, 15. Overflow pipe, 16. Condensate discharge assembly, 1601, Condensate discharge pipe, 1602, Condensate discharge valve, 17. Flow gap, 18. Circulating water pump, 19. Water inlet valve, 20. Water outlet valve, 21. Observation port, 22. Heating water outlet pipe, 23. Heating carrier. DETAILED DESCRIPTION

[0025] 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 of 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.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0028] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] like Figure 1-Figure 2As shown, a biomass stove flue gas waste heat recovery device includes a flue gas heat exchanger 1. A partition 2 is installed at the bottom of the inner cavity of the flue gas heat exchanger 1. The partition 2 divides the inner cavity of the flue gas heat exchanger 1 into a high-temperature cavity 3 and a low-temperature cavity 4. The high-temperature cavity 3 is connected to the exhaust port of the biomass stove 6 through a high-temperature flue gas pipe 5. The low-temperature cavity 4 is connected to the flue gas external exhaust port through a low-temperature flue gas pipe 7. The flue gas discharged from the exhaust port of the biomass stove 6 first enters the high-temperature cavity 3 through the high-temperature flue gas pipe 5. Under the obstruction of the partition 2, the flue gas moves upward. , and enters the low-temperature chamber 4, and is finally discharged into the atmosphere by the low-temperature flue gas pipe 7 and the flue gas outlet. A plurality of heat pipes 8 are arranged and installed in the high-temperature chamber 3 and the low-temperature chamber 4. One end of the heat pipe 8 is arranged in the high-temperature chamber 3 and the low-temperature chamber 4, and the other end penetrates the side wall of the flue gas heat exchanger 1 and extends to the high-temperature water tank 9 and the low-temperature water tank 10 respectively. The heat pipe 8 is provided to realize the heat exchange with the flue gas, and the heat is transferred to the high-temperature water tank 9 and the low-temperature water tank 10 respectively, so as to heat the high-temperature water tank 9 and the low-temperature water tank 10. The high-temperature water tank 9 is connected to the heating water inlet pipe 12 through the high-temperature pipe 11, and the low-temperature water tank 10 is connected to the heating water return pipe 14 through the low-temperature pipe 13. The high-temperature water tank 9 and the low-temperature water tank 10 are connected through the overflow pipe 15. The bottom of the flue gas heat exchanger 1 is also connected to a condensed water discharge component 16. The inner cavity of the flue gas heat exchanger 1 can be divided into a high-temperature cavity 3 and a low-temperature cavity 4 by the partition 2. By arranging heat pipes 8 in the high-temperature cavity 3 and the low-temperature cavity 4, the flue gas discharged from the biomass furnace 6 passes through When the high-temperature chamber 3 and the low-temperature chamber 4 are connected, the heat pipe 8 absorbs the heat of the flue gas and transfers it to the high-temperature water tank 9 and the low-temperature water tank 10, thereby realizing secondary heat exchange of the flue gas and improving the heat exchange efficiency of the flue gas. The bottom of the flue gas heat exchanger 1 is also connected to a condensed water discharge component 16. The condensed water generated during the flue gas heat exchange will accumulate at the bottom of the flue gas heat exchanger 1 along with the smoke. The condensed water can be discharged together with the smoke through the condensed water discharge component 16, reducing the accumulation of smoke and ensuring that the equipment can operate for a long time.

[0030] like Figure 1-Figure 2 As shown, the partition 2 is arranged in the middle position of the inner cavity of the flue gas heat exchanger 1, and the bottom of the partition 2 is fixedly connected to the bottom of the inner cavity of the flue gas heat exchanger 1. The inner cavity of the flue gas heat exchanger 1 is divided into a high-temperature cavity 3 and a low-temperature cavity 4 by the partition 2. A flow gap 17 is provided between the top of the partition 2 and the top of the inner cavity of the flue gas heat exchanger 1. The flow gap 17 connects the high-temperature cavity 3 and the low-temperature cavity 4. The high-temperature cavity 3, the flow gap 17 and the low-temperature cavity 4 together form a U-shaped cavity structure. Through the design of the U-shaped cavity structure, the length and time of flue gas heat exchange in the flue gas heat exchanger 1 are extended, so that the flue gas can fully exchange heat with the heat pipe 8, thereby improving the flue gas waste heat recovery rate and reducing the heat loss of the biomass furnace 6.

[0031] like Figure 1-Figure 2As shown, a circulating water pump 18 and a water inlet valve 19 are installed on the low-temperature pipeline 13, and a water outlet valve 20 is installed on the high-temperature pipeline 11. The circulating water pump 18 is provided to provide power for the flow of water in each pipeline, the water inlet valve 19 is provided to control the entry of water into the low-temperature pipeline 13, and the water outlet valve 20 is provided to control the outflow of water from the high-temperature pipeline 11.

[0032] like Figure 1-Figure 2 As shown, the condensate discharge assembly 16 includes a condensate discharge pipe 1601, which is in a Y-shaped structure and has two input ends and one output end. The two input ends of the condensate discharge pipe 1601 are respectively connected to the bottom of the high-temperature chamber 3 and the bottom of the low-temperature chamber 4, and a condensate discharge valve 1602 is installed on the output end of the condensate discharge pipe 1601. During the flue gas heat exchange, the water vapor in the flue gas will condense into water. The condensate will take away part of the smoke attached to the heat pipe 8 during the dripping process and accumulate at the bottom of the flue gas heat exchanger 1. The condensate and dust at the bottom of the flue gas heat exchanger 1 can be discharged in time through the condensate discharge pipe 1601, thereby reducing the accumulation of smoke and dust and ensuring that the equipment can operate for a long time.

[0033] like Figure 1-Figure 2 As shown, an observation port 21 is also installed on the flue gas heat exchanger 1. The observation port 21 is arranged on the top of the flue gas heat exchanger 1. The observation port 21 is arranged to facilitate observation of the operating status of the inner cavity of the flue gas heat exchanger 1.

[0034] like Figure 1-Figure 2 As shown, the heat pipe 8 adopts a high-temperature resistant glass tube. The heat pipe 8 is installed obliquely on the side wall of the flue gas heat exchanger 1, and the angle between the heat pipe 8 and the side wall of the flue gas heat exchanger 1 is 75°-85°. The medium in the heat pipe 8 is water or ethanol. By adopting glass material, the heat pipe 8 is not easily corroded without reducing the heat exchange efficiency, and dust is not easily attached to the surface, so that the flue gas waste heat recovery device of the biomass furnace 6 can work for a long time and effectively improve the heat exchange efficiency. By installing the heat pipe 8 obliquely on the side wall of the flue gas heat exchanger 1, it is beneficial to fully exchange heat between the flue gas and the medium in the heat pipe 8, thereby improving the heat exchange efficiency.

[0035] like Figure 1-Figure 2 As shown, the inner cavity side wall of the flue gas heat exchanger 1 and the surface of the partition 2 are covered with an anti-corrosion layer. The anti-corrosion layer is used to enhance the corrosion resistance of the flue gas heat exchanger 1 and the partition 2 and extend the service life. At the same time, the anti-corrosion layer covered on the partition 2 can also increase the flue gas flow rate.

[0036] like Figure 1-Figure 2As shown, the heating water inlet pipe 12 is connected to the input end of the heating device in the biomass furnace 6, the output end of the heating device in the biomass furnace 6 is connected to the heating water outlet pipe 22, the heating water outlet pipe 22 is connected to the input end of the heating carrier 23, and the output end of the heating carrier 23 is connected to the heating return pipe 14 and the heating water inlet pipe 12. Therefore, the water in the heating water inlet pipe 12 can be heated by the biomass furnace 6 and transported to the heating carrier 23 through the heating water outlet pipe 22. Part of the cooled water enters the heating return pipe 14 and is heated by the flue gas waste heat recovery device of the biomass furnace 6. The remaining part directly enters the biomass furnace 6 through the heating water inlet pipe 12 for heating. While realizing circulating heating, it can also make full use of the waste heat in the flue gas of the biomass furnace 6 to improve resource utilization.

[0037] For ease of understanding, the working process of this embodiment is given below:

[0038] like Figure 1-Figure 2 As shown, the flue gas generated by the combustion of the biomass furnace 6 enters the high-temperature chamber 3 of the flue gas heat exchanger 1 through the high-temperature flue gas pipe 5, and exchanges heat with the heat pipe 8 in the high-temperature chamber 3. The heat pipe 8 absorbs the heat in the flue gas and transfers it to the high-temperature water tank 9 to heat the water in the high-temperature water tank 9. Afterwards, under the obstruction of the partition 2, the flue gas enters the low-temperature chamber 4 through the flow gap 17, and performs a secondary heat exchange with the heat pipe 8 in the low-temperature chamber 4. The heat pipe 8 absorbs the heat in the flue gas again and transfers it to the low-temperature water tank 10 to heat the water in the low-temperature water tank 10. The low-temperature water tank 10 is connected to the heating return pipe 14 through the low-temperature pipe 13, and the heating The return pipe 14 transports the water after the heat loss to the low-temperature water tank 10 for initial heating, and then enters the high-temperature water tank 9 through the overflow pipe 15 for reheating. The heated water is connected to the heating water inlet pipe 12 through the high-temperature pipe 11, and flows into the biomass furnace 6 through the heating water inlet pipe 12. After being heated in the biomass furnace 6, it is heated to the heating carrier 23 through the heating water outlet pipe 22. After the heat in the heating carrier 23 is lost, it flows back into the heating return pipe 14 and the heating water inlet pipe 12, thereby realizing the heating cycle, and recycling the waste heat in the flue gas during the cycle, thereby improving resource utilization;

[0039] During flue gas heat exchange, water vapor in the flue gas will condense into water. The condensed water will take away part of the smoke attached to the heat pipe 8 during the dripping process and accumulate at the bottom of the flue gas heat exchanger 1. It will be discharged in time through the condensed water discharge pipe 1601, reducing the accumulation of smoke and ensuring that the equipment can operate for a long time.

[0040] In summary, the utility model provides a biomass furnace flue gas waste heat recovery device, which can realize secondary heat exchange of flue gas and improve the heat exchange efficiency. At the same time, it can reduce smoke accumulation and ensure long-term and efficient operation of the equipment.

[0041] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A biomass furnace flue gas waste heat recovery device, characterized in that: It includes a flue gas heat exchanger, a partition is installed at the bottom of the inner cavity of the flue gas heat exchanger, the partition divides the inner cavity of the flue gas heat exchanger into a high-temperature cavity and a low-temperature cavity, the high-temperature cavity is connected to the smoke exhaust port of the biomass furnace through a high-temperature smoke pipe, and the low-temperature cavity is connected to the smoke exhaust port through a low-temperature smoke pipe. A plurality of heat pipes are arranged and installed in the high-temperature cavity and the low-temperature cavity, one end of the heat pipe is arranged in the high-temperature cavity and the low-temperature cavity, and the other end passes through the side wall of the flue gas heat exchanger and extends to the high-temperature water tank and the low-temperature water tank respectively, the high-temperature water tank is connected to the heating water inlet pipe through a high-temperature pipe, and the low-temperature water tank is connected to the heating water return pipe through a low-temperature pipe, the high-temperature water tank and the low-temperature water tank are connected through an overflow pipe, and the bottom of the flue gas heat exchanger is also connected to a condensate discharge component.

2. The biomass furnace flue gas waste heat recovery device according to claim 1, characterized in that: The partition is arranged in the middle position of the inner cavity of the flue gas heat exchanger, the bottom of the partition is fixedly connected to the bottom of the inner cavity of the flue gas heat exchanger, and a flow gap is provided between the top of the partition and the top of the inner cavity of the flue gas heat exchanger, the flow gap connects the high-temperature cavity and the low-temperature cavity, and the high-temperature cavity, the flow gap and the low-temperature cavity together form a U-shaped cavity structure.

3. The biomass furnace flue gas waste heat recovery device according to claim 1, characterized in that: A circulating water pump and a water inlet valve are installed on the low-temperature pipeline, and a water outlet valve is installed on the high-temperature pipeline.

4. The biomass furnace flue gas waste heat recovery device according to claim 1, characterized in that: The condensate discharge assembly includes a condensate discharge pipe, which is in a Y-shaped structure and has two input ends and one output end. The two input ends of the condensate discharge pipe are respectively connected to the bottom of the high-temperature chamber and the low-temperature chamber, and a condensate discharge valve is installed on the output end of the condensate discharge pipe.

5. The biomass furnace flue gas waste heat recovery device according to claim 1, characterized in that: The flue gas heat exchanger is also provided with an observation port, which is arranged at the top of the flue gas heat exchanger.

6. The biomass furnace flue gas waste heat recovery device according to claim 1, characterized in that: The heat pipe is a high temperature resistant glass tube, and is obliquely installed on the side wall of the flue gas heat exchanger. The angle between the heat pipe and the side wall of the flue gas heat exchanger is 75°-85°. The medium in the heat pipe is water or ethanol.

7. The biomass furnace flue gas waste heat recovery device according to claim 1, characterized in that: The inner cavity side wall of the flue gas heat exchanger and the surface of the partition are covered with an anti-corrosion layer.

8. The biomass furnace flue gas waste heat recovery device according to claim 1, characterized in that: The heating water inlet pipe is connected to the input end of the heating device in the biomass furnace, the output end of the heating device in the biomass furnace is connected to the heating water outlet pipe, the heating water outlet pipe is connected to the input end of the heating carrier, and the output end of the heating carrier is connected to the heating return pipe and the heating water inlet pipe.

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