Flue gas waste heat recovery heat supply device of gas-fired boiler
By designing a gas boiler flue gas waste heat recovery and heating device including a flue gas box body, a filter plate, a hot water outlet joint box, a cold water inlet box, a condensate collection bucket, a heat pump unit and a waste heat circulation pump, the problem of poor coupling effect of the gas boiler flue gas waste heat recovery device in the urban heating system and poor adaptation of the equipment to the harsh flue gas environment is solved, and efficient flue gas waste heat recovery and utilization are achieved.
Patent Information
- Application Number
- CN202421482096.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The coupling effect of the gas boiler flue gas waste heat recovery device in urban heating systems is poor, the equipment has poor adaptation to the harsh flue gas environment, and has failed to effectively recover the moisture in the flue gas, and the lower limit of the flue gas temperature is not ideal.
A gas boiler flue gas waste heat recovery and heating device is designed, including a flue gas box body, a filter plate, a hot water outlet connecting box, a cold water inlet box, a condensate collection bucket, a heat pump unit and a waste heat circulation pump. Through the coordinated work of these components, the flue gas waste heat is recovered and utilized.
The device can effectively reduce the flue gas temperature, improve the utilization rate of flue gas waste heat, save fuel consumption of gas boiler and water resource consumption of heating system, and also have the advantages of simple structure and easy installation and use.
Smart Images
Figure CN222760912U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas boilers, in particular to a gas boiler flue gas waste heat recovery heating device. Background Art
[0002] Gas boilers are the core equipment for energy conversion in urban heating enterprises. The boiler uses its own equipment to reduce the flue gas temperature to 45°C, but it still contains a large amount of heat energy, which is directly discharged into the atmosphere, resulting in energy waste. Using circulating water to continue to recover the heat energy in the flue gas and use it in the heating system saves energy consumption for heating enterprises; at the same time, it recovers the water in the flue gas and saves water resource consumption for heating enterprises. There have been many reports on the recovery and utilization of flue gas waste heat;
[0003] However, its coupling effect with the urban heating system is poor, the equipment is poorly adapted to the harsh flue gas environment, the moisture in the flue gas is not recycled, and the lower limit of the flue gas temperature reduction is not ideal. Therefore, it has become an urgent problem to be solved to perfect and improve the above problems. Summary of the invention
[0004] The purpose of the utility model is to provide a gas boiler flue gas waste heat recovery heating device to solve the problems raised in the above background technology, such as poor coupling effect with the urban heating system, poor adaptation of the equipment to the harsh flue gas environment, failure to recycle the water in the flue gas, and unsatisfactory lower limit of the flue gas temperature reduction.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas boiler flue gas waste heat recovery heating device, comprising a flue gas box body, a flue gas inlet pipe is arranged on the left surface of the flue gas box body, a flue gas outlet pipe is arranged on the right surface of the flue gas box body, a filter plate is arranged on the left surface of the flue gas inlet pipe, and a hot water outlet manifold and a cold water inlet manifold are arranged on the top surface of the flue gas box body from left to right in sequence;
[0006] A condensate collecting bucket is installed on the lower surface of the flue gas box body, a condensate discharge pipe is arranged on the lower surface of the condensate collecting bucket, a condensate tank is arranged at one end of the condensate discharge pipe away from the condensate collecting bucket, a first connecting pipe is arranged on the right side surface of the hot water outlet manifold, and a heat pump unit is arranged at one end of the first connecting pipe away from the hot water outlet manifold.
[0007] Preferably, a third connecting pipe is provided on the right side surface of the cold water inlet box, and a waste heat circulation pump is provided on the outer surface of the third connecting pipe.
[0008] Preferably, a pressure-stabilizing water pump body and a pressure relief solenoid valve are sequentially arranged on the lower surface of the waste heat circulation pump from left to right, and a pressure-stabilizing water tank is arranged at one end of the pressure-stabilizing water pump body and the pressure relief solenoid valve away from the third connecting pipe.
[0009] Preferably, a second connecting pipe is provided on the right side surface of the heat pump unit, and a heating circulation pump is provided at one end of the second connecting pipe away from the heat pump unit.
[0010] Preferably, the top surface of the heat pump unit is connected to an air outlet pipe via a pipeline, and the air outlet pipe is connected to the gas boiler.
[0011] Preferably, a stabilizing ring is provided inside the filter disc, a filter body is provided inside the stabilizing ring, a connecting hose is provided on the right side surface of the heat pump unit, and one end of the connecting hose away from the heat pump unit is installed on the top surface of the third connecting pipe.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] The gas boiler flue gas waste heat recovery heating device is provided with a flue gas box body, a smoke outlet pipe, a smoke inlet pipe, a filter plate, a hot water outlet manifold, a cold water inlet box, a condensate collection bucket, a condensate discharge pipe, a condensate tank, a first connecting pipe, a heat pump unit, a third connecting pipe and a waste heat circulation pump. When in use, the flue gas at 45 degrees enters the flue gas box body from the smoke inlet pipe and is discharged from the smoke outlet pipe. The flue gas temperature drops to 35 degrees, and then the flue gas is discharged into the chimney through the smoke outlet pipe. The flue gas contacts the heat exchange pipe in the flue gas box body, transfers the heat to the waste heat circulating water and collects it in the hot water outlet manifold. The waste heat circulating water is transported to the heat pump unit by the third connecting pipe and the waste heat circulation pump to heat the heating circulating water. The cooled waste heat circulating water returns to the cold water inlet box through the waste heat circulation pump, and is distributed by the cold water inlet box to the heat exchange pipe for further Absorb heat and save fuel consumption of gas boilers. After the flue gas is cooled and releases heat in the flue gas box body, the water vapor in the flue gas condenses into water and gathers inside the condensate collection bucket. It is then discharged to the condensate tank through the condensate discharge pipe for use in the heating system, saving water resource consumption in the heating system. The utility model uses corrosion-resistant equipment to reduce the flue gas temperature to below the acid dew point temperature to recover more flue gas waste heat, and also recovers the condensed water in the flue gas. It also includes a pressure-stabilizing water pump body and a pressure relief solenoid valve, so that the waste heat circulating water enters the air-water heat exchanger through the waste heat circulating pump and then returns to the heat pump unit. The device can operate continuously, stably and safely, can save boiler fuel consumption, and reduce water resource consumption in the heating system. In addition, the device has the advantages of simple structure, high flue gas waste heat utilization rate, and easy installation and use.
[0014] The gas boiler flue gas waste heat recovery heating device, through the smoke inlet pipe, filter plate, stabilizing ring and filter body, when in use, the flue gas is transported from the gas boiler to the inside of the filter plate, and the impurities in the flue gas can be filtered through the stabilizing ring and the filter body inside the filter plate, and the overall impurity removal effect is good, avoiding a large amount of impurities inside the subsequent flue gas waste heat recovery, which makes the subsequent heating effect poor. This design adopts mature heat exchange technology and equipment, has low manufacturing cost, and is easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;
[0016] Figure 2 It is a schematic diagram of the structure of the air outlet pipe and the heating circulation pump of the utility model;
[0017] Figure 3 It is a three-dimensional schematic diagram of the structure of the third connecting pipe and the pressure-stabilizing water tank of the utility model;
[0018] Figure 4 This is a schematic diagram of the disassembly of the filter disc and the stabilizing ring structure of the utility model.
[0019] In the figure: 1. flue gas box body; 2. smoke outlet pipe; 3. smoke inlet pipe; 4. filter plate; 5. hot water outlet manifold; 6. cold water inlet box; 7. condensate collection bucket; 8. condensate discharge pipe; 9. condensate tank; 10. first connecting pipe; 11. heat pump unit; 12. third connecting pipe; 13. waste heat circulation pump; 14. pressure-stabilizing water pump body; 15. pressure relief solenoid valve; 16. pressure-stabilizing water tank; 17. second connecting pipe; 18. heating circulation pump; 19. outlet pipe; 20. stabilizing ring; 21. filter body; 22. connecting hose. DETAILED DESCRIPTION
[0020] 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.
[0021] See also Figure 1-4 , an embodiment provided by the utility model:
[0022] A gas boiler flue gas waste heat recovery heating device, the hot water outlet manifold 5, cold water inlet box 6, heat pump unit 11, waste heat circulation pump 13, pressure-stabilizing water pump body 14, pressure relief solenoid valve 15 and heating circulation pump 18 used in this application are all products that can be directly purchased on the market, and their principles and connection methods are all existing technologies well known to those skilled in the art, so they will not be repeated here, including a flue gas box body 1, a smoke inlet pipe 3 is arranged on the left surface of the flue gas box body 1, a smoke outlet pipe 2 is arranged on the right surface of the flue gas box body 1, a filter plate 4 is arranged on the left surface of the smoke inlet pipe 3, a hot water outlet manifold 5 and a cold water inlet box 6 are arranged on the top surface of the flue gas box body 1 from left to right, a third connecting pipe 12 is arranged on the right surface of the cold water inlet box 6, a waste heat circulation pump 13 is arranged on the outer surface of the third connecting pipe 12, and a pressure-stabilizing water pump body 14 and a pressure relief solenoid valve 15 are arranged on the lower surface of the waste heat circulation pump 13 from left to right. A pressure stabilizing water tank 16 is provided at one end of the pressure pump body 14 and the pressure relief solenoid valve 15 away from the third connecting pipe 12, a stabilizing ring 20 is provided inside the filter disc 4, a filter screen body 21 is provided inside the stabilizing ring 20, a connecting hose 22 is provided on the right side surface of the heat pump unit 11, and one end of the connecting hose 22 away from the heat pump unit 11 is installed on the top surface of the third connecting pipe 12, and pipes are provided on the outer surfaces of the pressure stabilizing water pump body 14 and the pressure relief solenoid valve 15, and the air outlet pipe 19 is connected to the gas boiler, and the gas boiler is also connected to the heating circulation pump 18, and the flue gas is transported from the gas boiler to the inside of the filter disc 4, and the impurities in the flue gas can be filtered through the stabilizing ring 20 and the filter screen body 21 inside the filter disc 4, and the overall impurity removal effect is good, which avoids a large amount of impurities in the subsequent flue gas waste heat recovery, which makes the subsequent heating effect poor. The design adopts mature heat exchange technology and equipment, and has low manufacturing cost;
[0023] A condensate collecting bucket 7 is installed on the lower surface of the smoke box body 1. A condensate discharge pipe 8 is arranged on the lower surface of the condensate collecting bucket 7. A condensate tank 9 is arranged at one end of the condensate discharge pipe 8 away from the condensate collecting bucket 7. A first connecting pipe 10 is arranged on the right side surface of the hot water outlet header 5. A heat pump unit 11 is arranged at one end of the first connecting pipe 10 away from the hot water outlet header 5. A second connecting pipe 17 is arranged on the right side surface of the heat pump unit 11. The second connecting pipe 17 is away from the heat pump unit 11. A heat supply circulation pump 18 is arranged at one end of the heat pump unit 11. The top surface of the heat pump unit 11 is connected to an exhaust pipe 19 through a pipeline. The exhaust pipe 19 is connected to the gas boiler. The flue gas at 45 degrees enters the flue gas box body 1 from the smoke inlet pipe 3 and is discharged from the smoke outlet pipe 2. The flue gas temperature drops to 35 degrees. Then, the flue gas is discharged into the chimney through the smoke outlet pipe 2. The flue gas contacts the heat exchange pipe in the flue gas box body 1, transfers the heat to the waste heat circulating water and collects it in the hot water outlet manifold 5. The waste heat circulating water is connected to the waste heat circulating water by the third connecting pipe 12 and the waste heat circulating water. The ring pump 13 transfers heat to the heat pump unit 11 to heat the heating circulating water. The cooled waste heat circulating water returns to the cold water inlet box 6 through the waste heat circulating pump 13, and is distributed to the heat exchange tube by the cold water inlet box 6 to continue to absorb heat, saving fuel consumption of the gas boiler. After the flue gas is cooled and releases heat in the flue gas box body 1, the water vapor in the flue gas condenses into water and collects in the condensate collecting bucket 7. Then, it is discharged to the condensate tank 9 through the condensate discharge pipe 8 for use in the heating system, saving water consumption of the heating system. The utility model utilizes corrosion-resistant equipment to reduce the flue gas temperature to below the acid dew point temperature to achieve recovery of more flue gas waste heat, and also recovers the water condensed in the flue gas. It also includes a pressure-stabilizing water pump body 14 and a pressure relief solenoid valve 15, so that the waste heat circulating water enters the air-water heat exchanger through the waste heat circulating pump 13 and then returns to the heat pump unit 11. The device can operate continuously, stably and safely, can save boiler fuel consumption, and reduce water resource consumption in the heating system. In addition, the device has a simple structure and a high utilization rate of flue gas waste heat.
[0024] Working principle: When the staff uses this device, first connect the device to an external power supply to provide power support for the device. The 45-degree flue gas enters the flue gas box body 1 from the flue gas inlet pipe 3 and is discharged from the flue gas outlet pipe 2. The flue gas temperature drops to 35 degrees. Then the flue gas is discharged into the chimney through the flue gas outlet pipe 2. The flue gas contacts the heat exchange pipe in the flue gas box body 1, transfers the heat to the waste heat circulating water and collects it in the hot water outlet manifold 5. The waste heat circulating water is transported to the heat pump unit 11 by the third connecting pipe 12 and the waste heat circulating pump 13 to heat the heating circulating water. The cooled waste heat circulating water is returned to the cold water through the waste heat circulating pump 13. The inlet box 6 is allocated by the cold water inlet box 6 to the heat exchange tube to continue to absorb heat, saving the fuel consumption of the gas boiler. After the flue gas is cooled in the flue gas box body 1 to release heat, the water vapor in the flue gas condenses into water and collects inside the condensate collecting bucket 7, and then is discharged to the condensate tank 9 through the condensate discharge pipe 8. The flue gas is transported from the gas boiler to the inside of the filter disc 4. The impurities in the flue gas can be filtered through the stabilizing ring 20 and the filter body 21 inside the filter disc 4. The overall impurity removal effect is good, avoiding a large amount of impurities inside the subsequent flue gas waste heat recovery. The above is all the working principles of the present invention.
[0025] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.
Claims
1. A gas boiler flue gas waste heat recovery heating device, comprising a flue gas box body (1), a flue gas inlet pipe (3) being arranged on the left side surface of the flue gas box body (1), and a flue gas outlet pipe (2) being arranged on the right side surface of the flue gas box body (1), characterized in that: A filter plate (4) is provided on the left side surface of the smoke inlet pipe (3), and a hot water outlet manifold (5) and a cold water inlet manifold (6) are provided on the top surface of the smoke box body (1) in sequence from left to right; A condensate collecting hopper (7), the condensate collecting hopper (7) being mounted on the lower surface of the flue gas box body (1), a condensate discharge pipe (8) being provided on the lower surface of the condensate collecting hopper (7), a condensate tank (9) being provided at one end of the condensate discharge pipe (8) away from the condensate collecting hopper (7), a first connecting pipe (10) being provided on the right side surface of the hot water outlet manifold (5), and a heat pump unit (11) being provided at one end of the first connecting pipe (10) away from the hot water outlet manifold (5).
2. The gas boiler flue gas waste heat recovery and heating device according to claim 1 is characterized in that: A third connecting pipe (12) is provided on the right side surface of the cold water inlet box (6), and a waste heat circulation pump (13) is provided on the outer surface of the third connecting pipe (12).
3. The gas boiler flue gas waste heat recovery and heating device according to claim 2 is characterized in that: A pressure-stabilizing water pump body (14) and a pressure-relief solenoid valve (15) are arranged in sequence from left to right on the lower surface of the waste heat circulation pump (13); a pressure-stabilizing water tank (16) is arranged at one end of the pressure-stabilizing water pump body (14) and the pressure-relief solenoid valve (15) away from the third connecting pipe (12).
4. The gas boiler flue gas waste heat recovery and heating device according to claim 1 is characterized in that: A second connecting pipe (17) is provided on the right side surface of the heat pump unit (11), and a heating circulation pump (18) is provided at one end of the second connecting pipe (17) away from the heat pump unit (11).
5. The gas boiler flue gas waste heat recovery and heating device according to claim 1 is characterized in that: The top surface of the heat pump unit (11) is connected to an air outlet pipe (19) via a pipeline, and the air outlet pipe (19) is connected to a gas boiler.
6. The gas boiler flue gas waste heat recovery and heating device according to claim 1 is characterized in that: A stabilizing ring (20) is arranged inside the filter disc (4), a filter screen body (21) is arranged inside the stabilizing ring (20), a connecting hose (22) is arranged on the right side surface of the heat pump unit (11), and an end of the connecting hose (22) away from the heat pump unit (11) is mounted on the top surface of the third connecting pipe (12).