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CN-224215384-U - Enclosed type dining air blast gas stove capable of recovering flue gas waste heat

CN224215384UCN 224215384 UCN224215384 UCN 224215384UCN-224215384-U

Abstract

The utility model belongs to the technical field of gas stove design, in particular to a closed type dining air blast gas stove for recovering flue gas waste heat, wherein a pot body is arranged at the top of a stove body, a smoke exhaust pipeline is connected at the bottom of the stove body, the smoke exhaust pipeline is internally provided with a gas pipeline and an air pipeline, the air pipeline comprises a bottom air inlet cavity, a top air outlet cavity and a plurality of air guide pipes connected between the bottom air inlet cavity and the top air outlet cavity, and the air guide pipes are arranged at intervals. The gas pipeline is coaxially arranged in the air pipeline, the outer wall of the gas pipeline is connected with the bottom air inlet cavity and the top air outlet cavity into a whole, and the gas guide pipe and the gas pipeline are arranged at intervals. The bottom of the smoke exhaust pipeline is provided with a waste heat recovery pipeline, and a heat exchanger is arranged in the waste heat recovery pipeline. The gas stove can preheat gas and air by utilizing the waste heat of the flue gas, has larger preheating area, longer preheating stroke and higher preheating efficiency, and can further realize the recovery of the waste heat of the flue gas through the heat exchanger.

Inventors

  • YIN YANSHAN
  • PENG ZEPING
  • LI XINZHUO
  • LI SHIJIN
  • FU ZHUO
  • CHEN GUO
  • Xi Ruiying

Assignees

  • 长沙理工大学

Dates

Publication Date
20260508
Application Date
20250509

Claims (9)

  1. 1. A closed type dining blast gas stove capable of recovering waste heat of flue gas is characterized by comprising a horn-shaped stove body (1), wherein a pot body (2) is arranged at the horn mouth at the top of the stove body (1), a combustion cavity with a closed structure is surrounded by the stove body (1) and the pot body (2), a smoke exhaust pipeline (3) is connected to the bottom of the stove body (1), the combustion cavity is communicated with the smoke exhaust pipeline (3), a gas pipeline (4) and an air pipeline (5) are arranged in the smoke exhaust pipeline (3), the air pipeline (5) further comprises a bottom air inlet cavity (51), a top air outlet cavity (52) and a plurality of air guide pipes (53) connected between the bottom air inlet cavity (51) and the top air outlet cavity (52), the air guide pipes (53) are arranged at intervals, the gas pipeline (4) is coaxially arranged in the air pipeline (5), the outer wall of the gas pipeline (4) is communicated with the bottom air inlet cavity (51) and the top air outlet cavity (52) as a whole, the air guide pipes (53) are connected with the air guide pipes (522) and the air guide pipes (53) are arranged at intervals between the top air inlet cavity (52) and the top air outlet cavity (52), the gas-fired boiler is characterized in that a mixing chamber (523) is formed between the mixing plate (521) and the combustion plate (522), a plurality of first gas outlets (41) communicated with the mixing chamber (523) are formed in the side wall of the gas pipeline (4), a plurality of second gas outlets (42) communicated with the combustion cavity are formed in the side wall of the gas pipeline (4), the bottom of the smoke exhaust pipeline (3) and the bottom of the air pipeline (5) are both connected to a stove base, the bottom air inlet cavity (51) is connected with a blower, the bottom end of the gas pipeline (4) is communicated with an external air source, a waste heat recovery pipeline (7) communicated with the smoke exhaust pipeline (3) is arranged on the side wall of the bottom of the smoke exhaust pipeline (3), a heat exchanger (71) is arranged in the waste heat recovery pipeline (7), a cold water inlet of the heat exchanger (71) is connected with tap water, and hot water of the heat exchanger (71) is connected with an external load.
  2. 2. The closed type dining air blast gas stove for recovering flue gas waste heat according to claim 1, wherein a horn-shaped guide plate (6) is arranged in the combustion cavity, the bottom of the guide plate (6) is connected with a top air outlet cavity (52) of the air pipeline (5) into a whole, the guide plate (6) divides the combustion cavity into a combustion chamber (61) and a smoke exhaust chamber (62) which are communicated with each other at the top, the combustion chamber (61) is communicated with the mixing chamber (523), and the smoke exhaust chamber (62) is communicated with the smoke exhaust pipeline (3).
  3. 3. The closed type dining air blast gas stove for recovering flue gas waste heat according to claim 1, wherein the air duct (53) is a thin-walled tube, the wall thickness of the thin-walled tube is 2.5mm, and the wall thickness of the gas pipeline (4) is 5mm.
  4. 4. A closed type dining air blast gas stove for recovering flue gas waste heat according to claim 3, wherein an air duct (53) is welded and connected with the bottom air inlet cavity (51) and the top air outlet cavity (52) into a whole.
  5. 5. The enclosed type dining air blast gas stove for recovering flue gas waste heat according to claim 1, wherein the mixing plate (521) comprises a conical connecting part (521 a) and a porous plate (521 b), the bottom end of the conical connecting part (521 a) is connected with the outer wall of the gas pipeline (4), the porous plate (521 b) is connected with the top end outer wall of the conical connecting part (521 a), and the first gas outlet (41) is arranged at the same height position of the top surface of the porous plate (521 b).
  6. 6. The enclosed type dining air-blast gas stove for recovering flue gas waste heat according to claim 1, wherein the longitudinal section of the mixing chamber (523) has a structure with a narrow middle and wide two ends.
  7. 7. The closed type dining air blast gas stove for recovering flue gas waste heat according to claim 1, wherein the top end of the gas pipeline (4) is provided with a thin pipe section, the second gas outlet (42) is arranged on the outer wall of the thin pipe section, and the second gas outlet (42) is arranged close to the combustion disc (522).
  8. 8. The closed type dining air blast gas stove for recovering flue gas waste heat according to claim 1, wherein the heat exchanger (71) is a spiral tube heat exchanger or a metal plate heat exchanger.
  9. 9. The enclosed type dining air-blast gas stove for recovering flue gas waste heat according to any one of claims 1 to 8, wherein the load is a steam device.

Description

Enclosed type dining air blast gas stove capable of recovering flue gas waste heat Technical Field The utility model belongs to the technical field of gas stove design, and particularly relates to a closed type dining blast gas stove capable of recovering waste heat of flue gas. Background The traditional blast gas stove directly burns after gas and air are premixed, and the combustion temperature is not enough with air, and thermal efficiency is low, and in addition, traditional blast gas stove is through complicated pipe line system recovery waste heat, if adopts traditional heat exchanger to retrieve waste heat, and this kind of structure is with high costs, maintains difficultly, is difficult to popularize. The prior patent proposal with publication number CN102829495B discloses a structure for preheating fuel gas and air by utilizing flue gas, but the proposal is to pre-mix the fuel gas and the air firstly, and the flue gas pre-heats the pre-mixed gas, thus the structure for pre-heating only the mixed gas has small pre-heating area, shorter pre-heating stroke and limited pre-heating effect. Disclosure of utility model The utility model provides a closed type dining blast gas stove for recovering flue gas waste heat, which comprises a horn-shaped stove body, wherein a pot body is arranged at a horn mouth at the top of the stove body, a combustion cavity with a closed structure is enclosed by the stove body and the pot body, a smoke exhaust pipeline is connected to the bottom of the stove body, and the combustion cavity is communicated with the smoke exhaust pipeline; the exhaust gas pipeline is internally provided with a gas pipeline and an air pipeline, the air pipeline further comprises a bottom gas inlet cavity, a top gas outlet cavity and a plurality of gas guide pipes connected between the bottom gas inlet cavity and the top gas outlet cavity, the gas pipelines are arranged at intervals, the gas pipeline is coaxially arranged in the air pipeline, the outer wall of the gas pipeline is connected with the bottom gas inlet cavity and the top gas outlet cavity into a whole, the gas guide pipes and the gas pipeline are arranged at intervals, a mixing disc and a combustion disc are arranged in the top gas outlet cavity from bottom to top, a mixing chamber is formed between the mixing disc and the combustion disc, a plurality of first gas outlets communicated with the mixing chamber are arranged on the side wall of the gas pipeline, a plurality of second gas outlets communicated with the combustion cavity are arranged on the side wall of the gas pipeline, the bottom of the exhaust gas pipeline and the bottom of the air pipeline are both connected to a stove base, the bottom gas inlet cavity is connected with a blower, the bottom end of the gas pipeline is communicated with the outside air source, a waste heat recovery device is arranged on the side wall of the exhaust gas pipeline, the waste heat recovery device is connected with a tap water recovery device is arranged in the side wall of the exhaust gas pipeline, the hot water outlet of the heat exchanger is connected with an external load. In a specific embodiment, a horn-shaped guide plate is arranged in the combustion cavity, the bottom of the guide plate is connected with the top air outlet cavity of the air pipeline into a whole, the guide plate divides the combustion cavity into a combustion chamber and a smoke exhaust chamber, the top of the combustion chamber is communicated with the combustion chamber, the combustion chamber is communicated with the mixing chamber, and the smoke exhaust chamber is communicated with the smoke exhaust pipeline. In a specific embodiment, the air duct is a thin-walled tube, the wall thickness of the thin-walled tube is 2.5mm, and the wall thickness of the gas pipeline is 5mm. In a specific embodiment, the air duct, the bottom air inlet cavity and the top air outlet cavity are all welded together. In a specific embodiment, the mixing disk comprises a conical connecting portion and a porous disk, wherein the bottom end of the conical connecting portion is connected with the outer wall of the gas pipeline, the porous disk is connected with the outer wall of the top end of the conical connecting portion, and the first gas outlet is arranged at the same height of the top surface of the porous disk. In a specific embodiment, the longitudinal section of the mixing chamber has a structure with a narrow middle and wide two ends. In a specific embodiment, the top end of the gas pipeline is provided as a thin pipe section, the second gas outlet is provided on the outer wall of the thin pipe section, and the second gas outlet is provided close to the combustion disc. In a specific embodiment, the heat exchanger is a spiral tube heat exchanger or a metal plate heat exchanger. In a specific embodiment, the load is a steam appliance. The utility model has the advantages that the combustion cavity with a closed structure is enclosed