WO2019042266A1

WO2019042266A1 - Waste-heat recovery efficient energy-saving cooktop system

Info

Publication number: WO2019042266A1
Application number: PCT/CN2018/102588
Authority: WO
Inventors: 白洪华
Original assignee: 杭州超导科技有限公司
Priority date: 2017-08-27
Filing date: 2018-08-27
Publication date: 2019-03-07
Also published as: CN107345671A

Abstract

A waste-heat recovery efficient energy-saving cooktop system. A combustion chamber 13 is mounted on a support 16 in an embedded manner. An ignition assembly 14 is mounted in match with the combustion chamber 13. The combustion chamber 13 is provided with an air inlet. The air inlet matching the ignition assembly 14 is disposed and is used for providing oxygenating air to the ignition assembly 14. A gas ventilation hole is formed in the upper end of the combustion chamber 13 and is in communication with a flue-gas heat exchange assembly 15. The flue-gas heat exchange assembly 15 comprises a housing 3 for discharging flue gas. A heat conduction pipe 4 is disposed in the housing 3. The heat conduction pipe 4 is led in from a flue-gas outlet of the housing 3 and is led out from a flue-gas inlet of the housing 3. A heat conduction medium is disposed in the heat conduction pipe 4, and is introduced from the upper end of the heat conduction pipe 4. An air introduction port 2 is formed in the upper end of the combustion chamber 13. The lower end of the housing 3 is in communication with the air introduction port 2 to introduce glue gas discharged from the combustion chamber 13. An annular heat exchange loop 5 is disposed, and the annular heat exchange loop 5 is arranged around a supporting port 1. The annular heat exchange loop 5 introduces the heat conduction medium discharged from the heat conduction pipe 4 to exchange heat. A water tank 6 is disposed, and the housing 3 is mounted in the water tank, and the water tank 6 is in communication with the annular heat exchange loop 5 to introduce the heat conduction medium.

Description

Waste heat recovery high-efficiency energy-saving cooker system

Technical field

The invention relates to a kitchen stove, in particular to a waste heat recovery high-efficiency energy-saving cooker system.

Background technique

The existing cooker is provided with a cooker, a combustion chamber, an air inlet pipe and an intake pipe communicating with the combustion chamber, the air enters the combustion chamber through the air inlet pipe, the gas enters the combustion chamber through the intake pipe, and the combustion chamber is provided with an ignition system, and the ignition The system ignites to generate heat, and the flame produced by the combustion contacts the bottom of the pot to transfer heat to the pot. The cooker of this structure is mature in technology and simple in structure, and thus has been widely used. However, the temperature of the flame is the highest outside flame, and the flue gas with higher temperature after the heat exchange between the flame and the bottom of the pot is directly discharged, and is not directly discharged to the outside through the flue through secondary use, and the heat utilization rate is relatively low. The obvious characterization is that the kitchen chef in the summer canteen or restaurant is in the "sauna" every day. It can be seen that the cooker of this structure not only has serious heat loss, but also is not conducive to the maintenance of the kitchen environment. At the same time, the gas stove of this structure has a large gas consumption, and the direct combustion air is low in combustion efficiency and insufficient in combustion.

At the same time, in large kitchens such as cafeterias or restaurants, the demand for hot water for cleaning and cooking is very high, and existing canteens or restaurant kitchens usually need to prepare hot water for use. How to design the stove body can make full use of the hot gas generated by the combustion chamber, reduce the heat energy loss taken by the flue gas and make full use of the heat in the flue gas to improve the combustion efficiency of the gas, etc., which has become an urgent problem to be solved in the cooker.

technical problem

It can be seen that the cookware of the existing structure, when used, the heat energy generated by the cooker is seriously wasted due to the open structure, the gas loss is large, and the kitchen temperature is too high, which affects the comfort of the kitchen environment.

In addition, in large kitchens such as canteens or restaurants, the amount of hot water that needs to be cleaned and used for cooking is very large. The existing large kitchens usually need to prepare hot water for backup, and generally need to be equipped with an electric or gas water heater. Hot water demand is severely energy intensive.

Technical solution

In order to solve the problems existing in the prior art, the object of the present invention is to provide a heat collecting furnace thermal energy, fully utilizing the heat energy generated by the combustion chamber, and realizing the heat recovery of the flue gas, and the energy-saving cooker system.

In order to achieve the above object, a waste heat recovery high-efficiency energy-saving cooktop system of the present invention includes a cooker including a bracket, a combustion chamber, an ignition assembly, and a flue gas heat exchange assembly, wherein the combustion chamber is embedded in the bracket The ignition assembly is installed at the bottom of the combustion chamber, the combustion chamber is provided with an air inlet, the air inlet is arranged with the ignition assembly and is used for supplying an oxygen supply to the ignition assembly; and the upper end of the combustion chamber is provided with a ventilation hole. The vent hole communicates with the flue gas heat exchange component;

The flue gas heat exchange assembly includes a casing 3 for exhausting flue gas, and a heat pipe disposed in the casing, the heat pipe is inserted from one end of the flue gas outlet of the casing, from the shell The heat exchange tube is provided with a heat-conducting medium, and the heat-conducting medium is provided from the upper end of the heat-conducting tube; the upper end of the combustion chamber is provided with a vent, and the lower end of the shell is connected to the vent Flue gas flowing into the combustion chamber;

An annular heat exchange ring is disposed, the annular heat exchange ring is disposed around the support port, and the annular heat exchange ring is connected to the heat transfer medium passing through the heat pipe for heat exchange;

A water tank is provided, the casing is submerged in the water tank, and the water tank communicates with the annular heat exchange ring to pass into the heat transfer medium.

The combustion chamber is provided with a support port for supporting the pot or the cover body and being blocked by the pot or the cover body.

Preferably, the annular heat exchange ring is connected to the water tank through a cavity.

Preferably, the vent is disposed on the annular heat exchange ring;

Alternatively, a flue gas duct communicating with the vent opening through the cavity into the housing.

Preferably, the support port is formed around the annular heat exchange ring.

Preferably, a pot is also provided; the pot is embedded on the bracket and blocks the support port, and the flue gas or hot gas generated by the combustion chamber is forced into the flue gas heat exchange assembly;

Moreover, a cover body is further disposed, the cover body is closed at an upper end of the combustion chamber and the support port is blocked, and the flue gas or hot air generated by the combustion chamber is forced into the flue gas heat exchange component by the bracket. The cover body is provided with a heat insulation layer.

Preferably, the pot holder comprises an annular heat exchange ring and a support port formed by the annular heat exchange ring, and the annular heat exchange ring is provided with a support surface on a side of the support port, and the pot or cover is fitted Blocking the support port on the support surface;

Alternatively, the support surface includes an annular support surface disposed on the upper surface of the annular heat exchange ring and an annular slope surface on the inner side of the annular support portion for engaging the bottom of the pot body.

Preferably, the air inlet is provided with a blower, and the air blower is connected to an air inlet pipe, and the air inlet pipe passes through the flue gas passage to heat the air and then enters the combustion chamber; and the air inlet port is used to provide an oxygen supply air. It is heated by the flue gas heating element.

Preferably, a second heat exchange tube is further disposed, one end of the second heat exchange tube is connected to the outer wall of the annular heat exchange ring, and the other end is connected to a heating device, and the second heat exchange tube transmits heat of the annular heat exchange ring to The heating device.

Beneficial effect

1. The combustion chamber is embedded on the bracket and the hot gas overflows the combustion chamber by the pot, and the heat of the combustion chamber is gathered to facilitate the full utilization of the heat generated by the combustion; on the other hand, the stove is equipped with an embedded support. The pot or the cover body enables the heat generated by the combustion to be collected and used, thereby avoiding the diffusion loss of heat generated by the open and transparent combustion environment; in order to increase the combustion rate of the combustion chamber, the ignition assembly is provided with an air inlet for providing an oxygen-enriched air. And the inlet duct, the venting port is arranged at the upper end of the combustion chamber, and is used for the discharge of the flue gas, and also provides a unified discharge outlet for the unused hot air of the combustion chamber, which is used for the utilization and combustion of heat in the flue gas. The secondary use of heat provides conditions;

2. The flue gas passage in the flue gas heat exchange assembly is longitudinally arranged, which utilizes the natural phenomenon of air convection, guides the flue gas to pass through and discharges, and also discharges the heat released by the combustion, and the heat transfer tube directly conducts heat from the flue gas passage and transports To the heat-conducting medium in the heat-conducting cavity, the heat energy in the flue gas channel is transmitted through the heat-conducting medium, and the heat-conducting efficiency is high; the heat-conducting pipe is arranged in reverse with the flue gas channel, and the heat-conducting medium flue gas inlet is introduced, and the smoke is heated after being heated. The inlet of the gas passage is opened, and the temperature from the lower end to the upper end is gradually reduced when the flue gas passage is longitudinally arranged, and the heat transfer medium is gradually heated, the heat transfer efficiency of the flue gas passage is improved, the heat conduction efficiency is improved, and the heat transfer efficiency can be increased to a greater extent. Utilizing the secondary use of heat in the flue gas and heat released by the combustion;

3. The cooker system of the present invention can be widely applied to various large-scale kitchen stove systems for commercial use, and a blower is disposed at the air inlet, the air inlet is connected to an air inlet pipe, and the air inlet pipe is used for introducing air into the combustion chamber. The air in the air inlet duct is heated by the flue gas passage and then introduced into the combustion chamber to improve the heating efficiency.

4. The pot bracket is arranged on the bracket for supporting the pot or the lid body, and the pot bracket is provided with an annular inclined surface and an annular supporting surface for supporting various pots of different bottom shapes, when the pot or the lid is covered in the pot After the bracket is relatively closed, the upper end of the combustion chamber is relatively closed, so that the hot air in the combustion chamber is not scattered under the pot and is lost without any reason; an annular heat exchange ring is arranged on the pot bracket, and the annular heat exchange ring is disposed toward the side wall of the combustion chamber. Vent

5. The annular venting ring is connected to the supercatheter, and the supercatheter is connected to another cooking appliance or connected to a second heating device, which increases the form of secondary utilization of flue gas or hot gas, and improves the utilization rate of thermal energy;

6. The outlet of the upper end of the flue gas passage is directly connected to the outdoor design, so that the flue gas passage and the hood passage share an exhaust passage to prevent the black smoke from being generated in the exhaust passage by the flue gas and the soot.

DRAWINGS

Figure 1 is a schematic view 1 of the structure of the present invention;

Figure 2 is a cross-sectional view of the portion A of Figure 1;

Figure 3 is a schematic view 2 of the heat exchange structure of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be further described below in conjunction with the accompanying drawings:

Example 1:

As shown in FIG. 1-3, a waste heat recovery energy-efficient cooktop system includes a cooker 11 including a bracket 16, a combustion chamber 13, an ignition assembly 14, and a flue gas heat exchange assembly 15, and the ignition assembly 14 includes a lower end. a gas inlet pipe for gas, the combustion chamber 13 is embedded on the bracket 16; the ignition assembly 14 is mounted at the bottom of the combustion chamber 13, and the combustion chamber 13 is provided with an air inlet, the The tuyere cooperates with the ignition assembly 14 and is provided for supplying the oxygen supply to the ignition assembly 14. The air inlet is disposed adjacent to the ignition assembly 14; the upper end of the combustion chamber 13 is provided with a ventilation hole 2, and the ventilation hole 2 is connected to the flue gas heat exchange assembly 15 for reservation. The hot gas and flue gas of the combustion chamber pass into the heat exchange assembly 5;

a flue gas heat exchange assembly is provided, the flue gas heat exchange assembly includes a casing 3 for exhausting flue gas, and a heat pipe 4 is disposed in the casing 3, and the heat pipe 4 is from the casing An end of the flue gas outlet of the gas passage 3 is opened, and is exhausted from the inlet end of the flue gas inlet of the casing 3, wherein the heat transfer pipe 4 is provided with a heat-conducting medium, and the heat-conducting medium is introduced from the inlet end of the heat-conducting pipe 4, that is, from the The flue gas outlet of the casing 3 is open at one end; the upper end of the combustion chamber is provided with a vent 2, and the lower end of the casing 3 is connected to the vent 2;

An annular heat exchange ring 5 is arranged, the annular heat exchange ring 5 is arranged around the support port 1, and the annular heat exchange ring 5 is connected to the heat transfer medium passing through the heat pipe 4, and is heated by the hot gas at the upper end of the combustion chamber. Heat exchange, further increasing the temperature of the heat transfer medium flowing out of the heat pipe 4;

A water tank 6 is provided, and the casing 3 is submersedly installed in the water tank 6. The flue gas passage of the casing 3 extends out of the water tank 6 to discharge flue gas, thereby realizing heat exchange in the water tank 6. The heat transfer medium exchanges heat with the flue gas, and the water tank 6 communicates with the annular heat exchange ring 5 to pass into the heat transfer medium.

Wherein, the casing 3 extends out of the water tank 6 and has a flue gas outlet reserved.

In the flue gas heat exchange designed by the invention, the heat transfer pipe 4 in the casing 3 through which the flue gas flows has realized one heat exchange in the flue gas, and the casing 3 is sunk in the water tank 6 to realize the outside of the flue gas. In one heat exchange, the combined heat exchange between the inside of the flue gas and the outside of the flue gas makes the heat exchange of the flue gas very sufficient.

At the same time, the heat pipe 4 is opened from one end of the flue gas outlet of the casing, and is exhausted from one end of the flue gas port of the casing 3, and the heat transfer medium is introduced from the upper end of the heat pipe 4, that is, from the casing. The flue gas outlet of the 3 is opened at one end, and is taken out from the inlet end of the flue gas outlet, and the temperature of one end of the flue gas outlet is lower than the temperature of the end of the flue gas inlet, so that the heat transfer medium is gradually heated, and then the annular heat exchange ring 5 is passed, the ring The heat exchange ring 5 is located around the support port 1 at the upper end of the combustion chamber, and is the place with the highest temperature. In the present invention, the pot and the cover body provided by the support port 1 are combined to form a closed space, and the heat is concentrated in the combustion chamber. However, it can not be dissipated, and the heat energy is not wasted, and the heat transfer of the heat transfer medium can be effectively realized, and the heat energy can be effectively utilized.

The annular heat exchange ring 5 and the water tank 6 are connected through a cavity 51, and the annular heat exchange ring 5 has a high heat temperature, which improves the circulation of the heat conductive medium between the annular heat exchange ring 5 and the water tank 6, and can further The heat exchange of the annular heat exchange ring 5 is sufficiently performed. At the same time, the vent 2 is disposed on the annular heat exchange ring 5, and the flue gas passage 21 communicated by the vent 2 communicates with the housing 3 through the cavity 51, and the cavity 51 is effectively utilized on the one hand. The space prevents the vent 2 from being exposed outside the cooker, causing accidental injury, etc. On the other hand, the flue gas passage 21 communicating with the vent 2 can exchange heat with the heat transfer medium, so that the flue gas passage 21 communicating with the vent 2 can be used ordinary. The metal material can be selected from a wide range of materials, and the high temperature resistant material can be used without being burnt by high temperature, which saves cost and is safer, and can improve heat exchange efficiency and improve heat utilization.

The support port 1 is formed around the annular heat exchange ring 5, and can be directly installed on the existing stove body, which has small modifications to the existing stove body and is convenient to install.

The heat pipe 4 is made of a coil, which can improve heat exchange efficiency.

The present invention is further provided with a pot, the pot is embedded and sealed on the support port, and the flue gas or hot gas generated by the combustion chamber is forced into the flue gas heat exchange assembly;

At the same time, a cover body is also provided, the cover body is closed at the upper end of the combustion chamber and the support port 1 is blocked, and the flue gas or hot gas generated by the combustion chamber is forced into the flue gas heat exchange component with the support port. The cover body is provided with a heat insulation layer, and is directly heated when hot water is needed without using a stove. This design can be extended to the heating supply to the north, thus reducing the burden of electricity.

The water tank 6 is connected to the hot water storage tank 7 through a temperature-controlled intelligent water pump to realize storage of thermal energy.

In this embodiment, the flue gas heat exchange assembly 15 includes a casing 3, a flue gas passage communicating with the combustion chamber 13 and a heat transfer pipe 4, the flue gas passage being vertically disposed vertically in the casing 3 and vertically vertical The direction is heat conduction to the heat pipe 4, and the heat conductive medium passes through the water inlet 8 of the upper end of the heat pipe 4 through the flue gas outlet of the casing 3 into the heat pipe 4, and flows through the heat pipe 4 heated by the flue gas passage from top to bottom. Heating, the temperature of the heat-conducting medium is heated step by step, and after the heat exchange is completed from the position where the temperature of the upper end of the upper end of the combustion chamber is completed through the annular heat exchange ring 5, it flows into the water tank 6. The heat transfer medium in this embodiment selects liquid water.

In this embodiment, a pot is also provided; the pot is embedded on the bracket 16 and blocks the support port 1, and the flue gas or hot gas generated by the combustion chamber 13 is forced into the flue gas heat exchange. The assembly 15, which is configured to serve as a heated cookware, also functions as a barrier for the flue gas and hot gases in the combustion chamber, i.e., blocks the flue gas and hot gases from being freely dissipated from the combustion chamber 13 into the atmosphere.

An annular heat exchange ring 5 is disposed on the bracket 16, and the annular heat exchange ring 5 is disposed around the support port 1. In other words, the hollow portion of the annular heat exchange ring 5 constitutes a support port 1, and the annular heat exchange ring 5 is sealed and installed. As shown in the bracket 16, it can be seen that the combustion chamber 13 is embedded in the interior of the bracket 16, and it is difficult to communicate with the air except for the support port 1, the vent hole 2 and the air inlet; the annular heat exchange ring 5 faces the combustion chamber 13 A vent hole 2 is disposed on the side wall through which the combustion chamber 13 passes through the vent hole 7 and the cavity 51 to communicate with the flue gas passage.

In this embodiment, the bracket 16 is provided with a pot bracket for supporting a pot or a cover. The pot bracket includes a support port 1 and an annular heat exchange ring 5 disposed around the support port 1 for directly utilizing annular heat exchange. The ring 5 serves as a support member for supporting the pot or the cover body, and the support port 1 is disposed at an upper end of the combustion chamber 13, and the annular heat exchange ring 5 is provided with a support surface for supporting the pot or the cover body 20, The pot or cover 20 is attached to the support surface and blocks the support opening 1.

The support surface includes an annular support surface 153 disposed on the upper surface of the annular heat exchange ring 5, and an annular slope 152 on the inner side of the annular support surface 153 for engaging the bottom of the pot body 2. The annular support surface 153 may be an annular plane or an annular groove, and the annular support surface 153 or the annular slope 152 is disposed at the upper end of the vent hole 2.

The air inlet is provided with a blower 19, and the air blower 19 is connected to an air inlet pipe 12, and the air inlet pipe 12 is heated by the flue gas passage to the combustion chamber 13; the air inlet is provided for providing The oxygen wind is heated and exchanged by the flue gas heating unit 5. In the configuration of the embodiment, after the preheating of the oxygen-enhanced air through the flue gas passage and then into the combustion chamber 13, the gas combustion efficiency can be improved, the energy can be saved, and the energy is not increased by heating the oxygen-enriched wind.

A second heat exchange tube 16 is also provided. In order to improve the heat conduction efficiency, the second heat exchange tube 16 may be a heat transfer tube of a superconducting material. One end of the second heat exchange tube 16 is connected to the annular heat exchange ring 5, and the other end is connected to a heating device B, and the second heat exchange tube 16 conducts heat of the annular heat exchange ring 5 to the heating device B. The heating device B may be another cooking appliance for cooking, and is also a heating water tank, which is provided as needed.

In this embodiment, the flue gas passage is provided with a vent pipe 511 that is separately connected to the outdoor, and the black smoke is mixed with the flue gas and the oil fume; the heat transfer pipe 4 is connected to the hot water storage tank 7 through a temperature-controlled smart water pump 22.

In the waste heat recovery high-efficiency energy-saving cooker system of the embodiment, the temperature of the combustion chamber reaches 900 ° C, which is 200 ° C higher than the temperature of the open cooktop, and the temperature of the flue gas exiting the combustion chamber 13 reaches 600 ° C, and is exchanged by the flue gas heat exchange component 15 The temperature of the last exhausted flue gas is 50 degrees Celsius, which makes the heat energy utilization rate reach about 85%, which greatly improves the heat utilization rate.

In this embodiment, a cover body may be further disposed, the cover body is closed at the upper end of the combustion chamber 13 and the support port 1 is blocked, and the flue gas or hot air generated by the combustion chamber 13 is forced by the bracket 16 Into the flue gas heat exchange assembly 15, the cover body is provided with a heat insulation layer, and when the cookware is not needed, the cover cover seals the support port 1 on the support port 1 and is insulated by the heat insulation layer, so that the heat is burned The heat conduction is directly achieved by the hot gas and the flue gas, and the cooker system of the present embodiment is used as a boiler.

The embodiments described above are only for explaining the technical idea and the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the patent and implement it, and the present invention cannot be limited only by the embodiment. The scope of protection, that is, the equivalent changes or modifications made by the spirit of this patent, still fall within the protection scope of this patent.

Embodiments of the invention

Example 1:

The heat pipe 4 is made of a coil, which can improve heat exchange efficiency.

Industrial applicability

The invention provides a cooker system which gathers the heat energy of the combustion chamber, fully utilizes the heat energy generated by the combustion combustion chamber, and realizes the heat recovery of the flue gas, is energy-efficient and suitable for practical use.

Sequence table free content

Type the sequence table free content description paragraph here.

Claims

A waste heat recovery high-efficiency energy-saving cooker system, comprising: a cooker comprising a bracket, a combustion chamber, an ignition assembly and a flue gas heat exchange assembly, wherein the combustion chamber is embedded on the bracket; An ignition assembly is installed in cooperation with the combustion chamber, the combustion chamber is provided with an air inlet, the air inlet is arranged with the ignition assembly and is used for supplying an oxygen supply to the ignition assembly; and the upper end of the combustion chamber is provided with a ventilation hole, the ventilation hole Connecting the flue gas heat exchange component;

The flue gas heat exchange assembly includes a casing for exhausting flue gas, and a heat pipe is disposed in the casing, the heat pipe is open from one end of the flue gas outlet of the casing, from the casing The heat exchange tube is provided with a heat-conducting medium, and the heat-conducting medium is provided from the upper end of the heat-conducting tube; the upper end of the combustion chamber is provided with a vent, and the lower end of the shell is connected to the vent to pass Flue gas flowing into the combustion chamber;

An annular heat exchange ring is disposed, the annular heat exchange ring is disposed around the support port, and the annular heat exchange ring is connected to the heat transfer medium passing through the heat pipe for heat exchange;

a water tank is provided, the casing is submerged and installed in the water tank, and the water tank is connected to the annular heat exchange ring to pass into the heat transfer medium;

The combustion chamber is provided with a support port for supporting the pot or the cover body and being blocked by the pot or the cover body.
A waste heat recovery high-efficiency energy-saving cooker system according to claim 1, wherein the annular heat exchange ring and the water tank are connected through a cavity.
A waste heat recovery high-efficiency energy-saving cooktop system according to claim, wherein the vent is disposed on the annular heat exchange ring;

Alternatively, a flue gas duct communicating with the vent opening through the cavity into the housing.
The invention relates to a waste heat recovery high-efficiency energy-saving cooker system according to any one of claims 1 to 3, wherein the support port is formed around the annular heat exchange ring.
A waste heat recovery high-efficiency energy-saving cooker system according to any one of claims 1 to 3, characterized in that: a pot is further provided; the pot is embedded on the bracket and blocks the The support port, the flue gas or hot gas generated by the combustion chamber is forced into the flue gas heat exchange component;

Moreover, a cover body is further disposed, the cover body is closed at an upper end of the combustion chamber and the support port is blocked, and the flue gas or hot air generated by the combustion chamber is forced into the flue gas heat exchange component by the bracket. The cover body is provided with a heat insulation layer.
A waste heat recovery high-efficiency energy-saving cooker system according to claim 5, wherein the pot holder comprises an annular heat exchange ring and a support port formed by the annular heat exchange ring, the annular heat exchange ring is oriented a support surface is disposed on one side of the support port, and the pot or cover is attached to the support surface and the support port is blocked;

Alternatively, the support surface includes an annular support surface disposed on the upper surface of the annular heat exchange ring and an annular slope surface on the inner side of the annular support portion for engaging the bottom of the pot body.
The waste heat recovery high-efficiency energy-saving cooker system according to any one of claims 1, 2, 3 and 6, wherein the air inlet is provided with a blower, and the blower is connected to an air inlet pipe, the air inlet pipe After the air is heated through the flue gas passage, the air is introduced into the combustion chamber; and the air inlet is provided for supplying the oxygen-compensating air to be heated by the flue gas heating assembly.
A waste heat recovery high-efficiency energy-saving cooker system according to any one of claims 1, 2, 3 and 6, characterized in that: a second heat exchange tube is further provided, and one end of the second heat exchange tube is connected to the The outer wall of the annular heat exchange ring is connected to the heating device at the other end, and the second heat exchange tube conducts heat of the annular heat exchange ring to the heating device.