Waste heat recovery integrated heat exchanger equipment

Abstract

The invention discloses waste heat recovery integrated heat exchanger equipment, and relates to the technical field of condensers, the waste heat recovery integrated heat exchanger equipment comprises a condensation box body, the condensation box body is provided with an air inlet end, a pumping circulation pipeline and an exhaust end, the air inlet end is communicated with a flue, the air inlet end is cylindrical, and the air inlet end is provided with an auxiliary combustion section, an explosion removal section, a pre-collection section and a controller. The auxiliary combustion section conducts secondary combustion on combustible components in smoke, the gas detector monitors the smoke components in real time, and the controller dynamically adjusts the working state of the gas nozzle and the working state of the electric igniter. Energy gradient utilization, active safety protection and system integrated design are achieved, combustion optimization, detonation inhibition of dynamic pressure relief and flexible buffering and integrated innovation of residue management are carried out through secondary combustion, combustible impurities which are not fully combusted in flue gas and tail gas are greatly reduced, and the combustion efficiency is improved. The problems of ash deposition, detonation, low efficiency and maintenance of a traditional condenser are systematically solved.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas utilization. Background Art

[0002] During the operation of traditional coal-fired boilers, the direct emission of high-temperature flue gas (usually 120 - 500 °C) will cause a large amount of heat loss. For example, the flue gas discharge temperature of coal-fired power plants can reach above 150 °C, resulting in a 15% - 20% reduction in thermal efficiency, and accompanied by high carbon emissions and pollutant diffusion. The requirements for energy utilization efficiency in the industrial field have increased significantly. According to statistics, the annual energy consumption of boilers in China is about 2 billion tons of standard coal, and the carbon emissions account for 40% of the national total. It is urgent to break through the traditional energy consumption bottleneck through waste heat recovery technology to reduce resource waste and environmental pollution. For common waste heat recovery equipment, after the waste heat of high-temperature flue gas (usually 200 - 500 °C) is recovered through a heat exchanger or a waste heat boiler, it can be directly converted into steam or hot water to replace traditional coal / gas heating, improving the energy-saving rate. Waste heat power generation can improve energy utilization efficiency, and has the value of reducing costs, increasing efficiency and reducing carbon.

[0003] From the aspect of technical application, the waste heat recovery of boilers needs to match the characteristics of the scenario. Wide-channel plate heat exchangers or waste heat boilers with corrosion resistance are suitable for high-temperature flue gas, and the medium and low-temperature waste heat can be utilized in a cascade manner combined with heat pumps.

[0004] However, in the existing technology, especially in coal-fired or fly ash boilers, when the combustion is incomplete, a large amount of flue gas containing combustible gases is easily generated, resulting in a decrease in the flue gas temperature. At the same time, in order to increase the flue gas contact area, traditional heat exchangers need to adopt serpentine or complex heat exchange pipelines. The supplementary flue gas for combustion contains a large amount of pulverized coal particles, resulting in the adsorption, accumulation and agglomeration of dust in the flue gas, further reducing the flue gas flow rate, reducing the heat exchange efficiency, and bringing certain safety hazards. The residues of incomplete combustion accumulate in the heat exchange pipelines, and there are sparks in the flue gas of incomplete combustion, which is easy to cause deflagration, not conducive to the full recovery of waste heat, nor conducive to safe production. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated heat exchanger device for waste heat recovery in order to solve the above technical problems.

[0006] The present invention specifically adopts the following technical solutions to achieve the above purpose: An integrated heat exchanger device for waste heat recovery, including a condensation box body, an air inlet end, a pumping circulation pipeline and an exhaust end are provided on the condensation box body. The air inlet end is communicated with a flue. The air inlet end is in a cylindrical shape, and an auxiliary combustion section, an explosion relief section, a pre-collection section and a controller are provided on the air inlet end; The auxiliary combustion section includes a gas detector provided on the side where the intake end is connected to the flue. A mixed intake assembly and an auxiliary combustion assembly are also provided in the auxiliary combustion section. The mixed intake assembly includes a pumping intake pipe and a one-way valve provided on the outer periphery of the combustion section. The auxiliary combustion assembly includes a gas nozzle provided in the combustion section. There are several gas nozzles, which are annularly distributed on the inner wall of the combustion section. An electric igniter is provided at the end of the gas nozzle. The gas nozzle, the electric igniter, and the gas detector are all electrically connected to the controller. A fire seed collection assembly and an explosion deflagration pressure relief assembly are provided in the explosion relief section. Reinforcing ribs are distributed on the outer periphery of the explosion relief section. The fire seed collection assembly includes heating wires provided at the intake end of the explosion relief section. There are several heating wires, which are evenly distributed in the explosion relief section. The heating wires are electrically connected to the controller. The explosion deflagration pressure relief assembly includes a pressure relief mechanism and a buffer chamber that are sequentially connected on the outer periphery of the explosion relief section. An explosion shock isolation partition is provided in the explosion relief section. The buffer chamber is woven with heat-resistant materials. A slag discharge mechanism is provided in the pre-collection section. Through the above scheme, the auxiliary combustion section performs secondary combustion on the combustible components in the flue gas. The gas detector monitors the flue gas components in real time, and the controller dynamically adjusts the working states of the gas nozzle and the electric igniter. The explosion relief section adopts a multi-layer protection mechanism, and the explosion shock isolation partition and the buffer chamber cooperate to absorb the impact energy. At the same time, the pre-collection section separates the particulate matter in advance, reducing the load of the subsequent condenser. Energy cascade utilization, active safety protection, and system integration design are realized. This equipment integrates innovation in combustion optimization through secondary combustion, explosion deflagration suppression with dynamic pressure relief and flexible buffering, and residue management, greatly reducing the unburned combustibles mixed in the flue gas and tail gas, and systematically solving the problems of ash accumulation, explosion deflagration, low efficiency, and maintenance of traditional condensers.

[0007] Further, the opening of the gas nozzle is in the shape of a trapezoidal chamber. The gas nozzle is inclined towards the flue gas outflow direction. Fitting blocks are provided between adjacent gas nozzles. An annular converging ring is formed between the fitting blocks and the gas nozzle. Through the above scheme, the gas nozzle with a trapezoidal chamber structure forms a Venturi effect, and a swirling effect is generated in combination with the inclined installation angle. The annular converging ring enhances the turbulent mixing of the gas and the flue gas. The special layout of the fitting blocks forms an annular constrained flame structure, making the combustion more concentrated and stable. The technical effects are improved combustion efficiency, enhanced flame stability, and reduced residual amount of unburned gas.

[0008] Further, the fitting blocks and the gas nozzle are spliced by interference fitting with heating using a mortise and tenon structure. The fitting blocks and the gas nozzle are fixed to the inner wall of the auxiliary combustion section by riveting. Through the above solution, the fitting block and the gas nozzle are spliced by mortise and tenon structure with heating interference fit. The mortise and tenon structure cooperates with the thermal interference fit to form a self-locking effect, improving the vibration tolerance, extending the equipment life, and prolonging the maintenance cycle.

[0009] Furthermore, a preheating section that coils from the auxiliary combustion section is provided on the pumping intake pipe. The pumping intake pipe is a metal pipe, and the intake end of the pumping intake pipe is communicated with the outside and is equipped with a one-way valve. Through the above solution, the coiled preheating section preheats the gas using the waste heat of the flue gas at 200 - 300 °C, increasing the intake temperature. The metal pipe has a high thermal conductivity, improving the utilization rate of the combustion calorific value and further increasing the intake temperature, thereby raising the tail gas temperature of the secondary combustion.

[0010] Furthermore, there are 2 detonation resistance partitions, which are arranged oppositely. The 2 detonation resistance partitions are fixed at both ends of the inner cavity of the explosion venting section through sliding rods. The sliding rods are slidably embedded in the inner cavity of the explosion venting section, and a return spring is provided at the end. The return spring has a tendency to urge the detonation resistance partitions to move towards the inner cavity of the explosion venting section and away from the port of the explosion venting section. Through the above solution, the sliding rod is equipped with a return spring, which quickly completes the closing action after detecting the pressure wave. The detonation resistance partitions close the explosion venting section, guiding the detonation shock into the buffer chamber. At the same time, after the explosion pressure is relieved, the return spring drives the sliding rod to extend, urging the detonation resistance partitions to reset.

[0011] Furthermore, a high-temperature resistant rubber layer is laid on the periphery of the buffer chamber, and several tightening springs are wound around the periphery of the buffer chamber. The tightening springs have a tendency to maintain the buffer chamber in a contracted state. Through the above solution, the buffer chamber is made of heat-resistant woven material, and tightening springs are wound around the periphery to maintain the contracted state. When the pressure-relieving gas enters, the chamber expands to absorb the impact energy. The high-temperature resistant rubber outer layer resists the instantaneous high temperature, and the tightening springs force the chamber to return to its original state after the pressure is relieved. The combination of the flexible material and the elastic structure enables the buffer chamber to not only efficiently dissipate the explosion energy but also be reusable, reducing the maintenance cost.

[0012] Furthermore, the pressure relief mechanism includes a pressure relief pipe provided on the periphery of the explosion venting section. The end of the pressure relief pipe is communicated with the buffer chamber. An impact diaphragm is detachably connected to the pressure relief pipe, and the critical value of the breaking pressure of the impact diaphragm > 1.5 atm. Through the above solution, the diaphragm remains sealed under normal working conditions; when the explosion overpressure occurs, the diaphragm breaks to release the gas to the buffer chamber. After the overpressure is relieved, a new diaphragm can be quickly replaced. The use of a detachable impact diaphragm shortens the replacement operation time. At the same time, the impact diaphragm is broken by the impact, facilitating the pressure relief and buffering of the buffer chamber. After the pressure is relieved, the high-temperature resistant rubber layer and the tightening springs cooperate to urge the buffer chamber to retract and reset.

[0013] Furthermore, the slag discharging mechanism includes an installation through groove provided in the pre-collection section. A number of metal meshes are arranged in the installation through groove. The surface of the metal mesh is distributed with folds. The laying direction of the metal mesh is the same as the flue gas flow direction. Both ends of the installation through groove are connected to the collection section through flanges.

[0014] Through the above solution, multiple layers of corrugated metal meshes are laid in the installation through groove in the pre-collection section, and the mesh surface unfolds along the flue gas flow direction. The corrugated structure increases the filtration area and forms turbulence. Mesh holes at different levels intercept residue particles from thick to fine; flange connection facilitates the disassembly and cleaning of the metal mesh. This design reduces the blockage of the heat exchange pipeline through hierarchical filtration, the corrugated shape prolongs the service life of the filter screen, and reduces the slag cleaning frequency.

[0015] Furthermore, a slag receiving portion protruding downward is provided in the middle of the installation through groove.

[0016] Through the above solution, a slag receiving portion is formed by protruding downward in the middle of the installation through groove, which is convenient for collecting the dropped residues.

[0017] Furthermore, heat-insulating and fire-proof cotton is laid on the outer periphery of the air inlet end.

[0018] Through the above solution, the outer wall of the air inlet end is wrapped with heat-insulating and fire-proof cotton to block the transfer of internal high temperature to the external environment. The fire-proof cotton reduces heat loss to improve the waste heat recovery efficiency.

[0019] The beneficial effects of the present invention are as follows: 1. The structure of the present invention is simple. The auxiliary combustion section performs secondary combustion on the combustible components in the flue gas. The gas detector monitors the flue gas components in real time, and the controller dynamically adjusts the working states of the gas nozzle and the electric igniter. The explosion relief section adopts a multi-layer protection mechanism, and the detonation resistance baffle and the buffer chamber cooperate to absorb the impact energy. At the same time, the pre-collection section separates the particulate matter in advance, reducing the load of the subsequent condenser. Realize the cascade utilization of energy, active safety protection and system integration design. This equipment integrates innovation in combustion optimization through secondary combustion, deflagration suppression with dynamic pressure relief and flexible buffering, and residue management, greatly reducing the unburned combustibles mixed in the flue gas tail gas, and systematically solving the problems of ash accumulation, deflagration, low efficiency and maintenance of traditional condensers; 2. Under normal working conditions, the diaphragm remains sealed; when the deflagration overpressure occurs, the diaphragm ruptures and releases gas to the buffer chamber. After the overpressure is released, a new diaphragm can be quickly replaced. The impact diaphragm with detachable connection shortens the replacement operation time. At the same time, the impact diaphragm is broken by the impact, which is convenient for the buffer chamber to relieve pressure and buffer. After the pressure is relieved, the high-temperature resistant rubber layer and the tightening spring cooperate to cause the buffer chamber to retract and reset, improving the pressure relief and buffering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic cross-sectional structure diagram of the present invention; Figure 2 It is a schematic cross-sectional structure diagram of the intake end part of the present invention; Figure 3 is Figure 2 the enlarged structure diagram of part A in Figure 4 is Figure 2 the enlarged structure diagram of part B in

[0021] Reference numerals: 11, condensation box body; 12, intake end; 13, pumping circulation pipeline; 14, exhaust end; 15, auxiliary combustion section; 16, explosion relief section; 17, pre-collection section; 18, gas detector; 19, pumping intake pipe; 20, gas nozzle; 21, electric igniter; 22, heating wire; 23, buffer chamber; 24, detonation resistance partition board; 25, fitting block; 26, preheating section; 27, sliding rod; 28, return spring; 29, pressure relief pipe; 30, impact diaphragm; 31, tightening spring; 32, installation through groove; 33, wire mesh; 34, slag receiving part. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0024] Embodiment 1 As Figures 1 to 4 shown, this embodiment provides a waste heat recovery integrated heat exchanger device, including a condensation box body 11. An intake end 12, a pumping circulation pipeline 13, and an exhaust end 14 are provided on the condensation box body 11. The intake end 12 is communicated with a flue. The pumping circulation pipeline 13 is a coiled pipe and is connected to an external cold source through a pipeline. The intake end 12 is in a cylindrical shape. An auxiliary combustion section 15, an explosion relief section 16, a pre-collection section 17, and a controller are provided on the intake end 12. The device provides hot water and low-temperature tail gas, and the hot water is convenient for subsequent reuse; The auxiliary combustion section 15 includes a gas detector 18 disposed on the side where the intake end 12 is connected to the flue, for detecting the content of combustible gas. A mixed intake component and an auxiliary combustion component are also provided in the auxiliary combustion section 15. The mixed intake component includes a pumping intake pipe 19 and a one-way valve disposed on the outer periphery of the combustion section. The auxiliary combustion component includes a gas nozzle 20 disposed in the combustion section. A plurality of gas nozzles 20 are provided and are annularly distributed on the inner wall of the combustion section. An electric igniter 21 is disposed at the end of the gas nozzle 20; the gas nozzle 20, the electric igniter 21, and the gas detector 18 are all electrically connected to the controller; A fire seed collection component and an explosion combustion pressure relief component are provided in the explosion venting section 16. Reinforcing ribs are distributed on the outer periphery of the explosion venting section 16. The fire seed collection component includes heating wires 22 disposed at the intake end 12 of the explosion venting section 16. A plurality of heating wires 22 are provided and are evenly distributed in the explosion venting section 16. The heating wires 22 are electrically connected to the controller. The explosion combustion pressure relief component includes a pressure relief mechanism and a buffer chamber 23 connected in sequence on the outer periphery of the explosion venting section 16. An explosion shock isolation partition 24 is provided in the explosion venting section 16. The explosion shock isolation partition 24 is in the shape of a porous plate. The buffer chamber 23 is woven from heat-resistant materials; A slag discharge mechanism is provided in the pre-collection section 17.

[0025] Therefore, the auxiliary combustion section 15 performs secondary combustion on the combustible components in the flue gas. The gas detector 18 monitors the flue gas components in real time, and the controller dynamically adjusts the working states of the gas nozzle 20 and the electric igniter 21. The explosion venting section 16 adopts a multi-layer protection mechanism, and the explosion shock isolation partition 24 and the buffer chamber 23 cooperate to absorb the impact energy. At the same time, the pre-collection section 17 separates particulate matters in advance, reducing the load of the subsequent condenser. By realizing cascaded energy utilization, active safety protection, and system integration design, this equipment integrates innovation in combustion optimization through secondary combustion, explosion combustion suppression with dynamic pressure relief and flexible buffering, and residue management, greatly reducing the inclusion of unburned combustibles in the flue gas and tail gas, and systematically solving the problems of ash accumulation, explosion combustion, low efficiency, and maintenance of traditional condensers.

[0026] Such as Figures 1 to 4As shown, the gas nozzle 20 has an opening in the shape of a trapezoidal chamber. The gas nozzle 20 is inclined towards the direction of flue gas outflow. There are fitting blocks 25 between adjacent gas nozzles 20. An annular converging ring is formed between the fitting blocks 25 and the gas nozzle 20. The fitting blocks 25 and the gas nozzle 20 are assembled by mortise and tenon structure with thermal interference fit. The fitting blocks 25 and the gas nozzle 20 are fixed to the inner wall of the auxiliary combustion section 15 by riveting. The gas nozzle 20 with a trapezoidal chamber structure forms a Venturi effect, and a swirling effect is generated in combination with the inclined installation angle. The annular converging ring enhances the turbulent mixing of gas and flue gas. The special layout of the fitting blocks 25 forms an annular constrained flame structure, making the combustion more concentrated and stable. The technical effects are improved combustion efficiency, enhanced flame stability, reduced residual amount of unburned gas, the mortise and tenon structure combined with thermal interference fit forms a self-locking effect, improved vibration tolerance, extended equipment life, and extended maintenance cycle.

[0027] As Figures 1 to 4 shown, a preheating section 26 that starts to coil from the auxiliary combustion section 15 is provided on the pumping inlet pipe 19. The preheating section 26 on the pumping inlet pipe 19 is densely coiled on the inner cavity wall of the auxiliary combustion section 15. At the same time, a plurality of circular air inlet openings are distributed on the preheating section 26. The pumping inlet pipe 19 is a metal pipe. The air inlet end 12 of the pumping inlet pipe 19 is communicated with the outside and is equipped with a one-way valve. The coiled preheating section 26 preheats the gas by using the waste heat of the flue gas at 200 - 300 °C, increasing the inlet air temperature. The metal pipe has a high thermal conductivity, improving the utilization rate of combustion calorific value and further increasing the inlet air temperature, thereby increasing the tail gas temperature of secondary combustion.

[0028] As Figures 1 to 4 shown, there are 2 detonation resistance partitions 24, which are arranged oppositely. The 2 detonation resistance partitions 24 are fixed to both ends of the inner cavity of the explosion exhaust section 16 by sliding rods 27. The sliding rods 27 are slidably embedded in the inner cavity of the explosion exhaust section 16 and are provided with return springs 28 at their ends. The return springs 28 have a tendency to move the detonation resistance partitions 24 towards the inner cavity of the explosion exhaust section 16 and away from the port of the explosion exhaust section 16. The sliding rods 27 are equipped with return springs 28 and quickly complete the closing action after detecting the pressure wave. The detonation resistance partitions 24 close the explosion exhaust section 16, guiding the detonation shock into the buffer chamber 23. At the same time, after the explosion pressure is released, the return springs 28 drive the sliding rods 27 to extend, prompting the detonation resistance partitions 24 to reset.

[0029] As Figures 1 to 4As shown in the figure, the pressure relief mechanism includes a pressure relief pipe 29 arranged on the outer periphery of the explosion venting section 16. The end of the pressure relief pipe 29 is communicated with the buffer chamber 23. An impact diaphragm 30 is detachably connected to the pressure relief pipe 29. The critical value of the breaking pressure of the impact diaphragm 30 is >1.5 atm. A high-temperature resistant rubber layer is arranged on the outer periphery of the buffer chamber 23. A number of tightening springs 31 are wound around the outer periphery of the buffer chamber 23. The tightening springs 31 tend to maintain the buffer chamber 23 in a contracted state. Therefore, the diaphragm remains sealed under normal working conditions; when there is deflagration overpressure, the diaphragm ruptures to release gas into the buffer chamber 23. After the overpressure is relieved, a new diaphragm can be quickly replaced. By using the detachably connected impact diaphragm 30, the replacement operation time is shortened. At the same time, the impact diaphragm 30 is broken by the impact, which is convenient for the buffer chamber 23 to relieve pressure and buffer. After the pressure relief is completed, the high-temperature resistant rubber layer cooperates with the tightening springs 31 to prompt the buffer chamber 23 to retract and reset. The buffer chamber 23 is made of heat-resistant woven material, and the tightening springs 31 are wound around the outer periphery to maintain the contracted state. When the pressure relief gas enters, the chamber expands to absorb the impact energy, and the high-temperature resistant rubber outer layer resists the instantaneous high temperature. The tightening springs 31 force the chamber to return to its original state after the pressure relief. The combination of the flexible material and the elastic structure enables the buffer chamber 23 to not only efficiently dissipate the explosion energy but also be reused, reducing the maintenance cost.

[0030] As Figures 1 to 4 shown, the slag discharging mechanism includes an installation through groove 32 arranged in the pre-collection section 17. A number of metal meshes 33 are arrayed in the installation through groove 32. The mesh surface of the metal meshes 33 is distributed with wrinkles. The laying direction of the metal meshes 33 is the same as the flue gas flow direction. Both ends of the installation through groove 32 are connected to the collection section through flanges. A slag receiving portion 34 protruding downward is arranged in the middle of the installation through groove 32. Multiple layers of wrinkled metal meshes 33 are laid in the installation through groove 32 in the pre-collection section 17, and the mesh surface unfolds along the flue gas flow direction. The wrinkled structure increases the filtration area and forms turbulence. The mesh holes of different levels intercept residue particles from thick to fine; the flange connection facilitates the disassembly and cleaning of the metal meshes 33. This design reduces the blockage of the heat exchange pipeline through hierarchical filtration, and the wrinkled shape prolongs the service life of the filter screen, reducing the slag cleaning frequency. The slag receiving portion 34 protruding downward in the middle of the installation through groove 32 facilitates the collection of the fallen residues.

[0031] The outer periphery of the air inlet end 12 is provided with heat insulation and fireproof cotton, and the outer wall of the air inlet end 12 is wrapped with heat insulation and fireproof cotton to block the transfer of internal high temperature to the external environment. The fireproof cotton reduces heat loss to improve the waste heat recovery efficiency.

[0032] Example 2 Example 2 has basically the same structure as Example 1. The difference is that in Example 2, the buffer chamber 23 is a porous bag-like structure, aiming to reduce the damage of the buffer chamber 23 after a violent deflagration.

[0033] Example 3 Embodiment 3: Its structure is basically the same as that of Embodiment 1, except that in Embodiment 3, an elastic metal sheet is provided at the end of the sliding rod 27, and the sliding rod 27 is driven to extend through the elastic metal sheet. At the same time, in order to improve the service life of the device, the elastic metal sheet is made of a high-temperature resistant alloy.

[0034] Implementation principle: This application discloses a waste heat recovery integrated heat exchanger device. The auxiliary combustion section 15 performs secondary combustion on the combustible components in the flue gas. The gas detector 18 monitors the flue gas components in real time, and the controller dynamically adjusts the working states of the gas nozzle 20 and the electric igniter 21. The explosion relief section 16 adopts a multi-layer protection mechanism, and the shock wave resistance partition plate 24 and the buffer chamber 23 cooperate to absorb the impact energy. At the same time, the pre-collection section 17 separates the particulate matter in advance to reduce the load of the subsequent condenser. By realizing the cascade utilization of energy, active safety protection and system integration design, this device integrates and innovates combustion optimization through secondary combustion, dynamic pressure relief and flexible buffer deflagration suppression, and residue management, greatly reducing the inclusion of unburned combustibles in the flue gas and tail gas, and systematically solving the problems of ash accumulation, deflagration, low efficiency and maintenance of traditional condensers.

[0035] It should be noted that the connection relationships of the components not specifically mentioned in this application are default to adopt the existing technologies. Since they do not involve the inventive points and are widely used in the existing technologies, the structural connection relationships are not described in detail.

Claims

1. An integrated heat recovery heat exchanger device, comprising a condensation box body (11), an air inlet end (12), a pumping circulation pipeline (13), and an exhaust end (14) are arranged on the condensation box body (11), the air inlet end (12) is communicated with a flue, and it is characterized in that, The intake end (12) is cylindrical, and an auxiliary combustion section (15), an explosion relief section (16), a pre-collection section (17), and a controller are provided on the intake end (12). The auxiliary combustion section (15) includes a gas detector (18) provided on the side of the intake end (12) connected to the flue. A mixed intake component and an auxiliary combustion component are also provided in the auxiliary combustion section (15). The mixed intake component includes a pumping intake pipe (19) provided on the outer periphery of the combustion section and a one-way valve. The auxiliary combustion component includes a gas nozzle (20) provided in the combustion section. A plurality of the gas nozzles (20) are provided and are annularly distributed on the inner wall of the combustion section. An electric igniter (21) is provided at the end of the gas nozzle (20). The gas nozzle (20), the electric igniter (21), and the gas detector (18) are all electrically connected to the controller. A fire collection component and an explosion deflagration pressure relief component are provided in the explosion relief section (16). Reinforcing ribs are distributed on the outer periphery of the explosion relief section (16). The fire collection component includes a heating wire (22) provided at the intake end (12) of the explosion relief section (16). A plurality of the heating wires (22) are provided and are evenly distributed on the explosion relief section (16). The heating wire (22) is electrically connected to the controller. The explosion deflagration pressure relief component includes a pressure relief mechanism and a buffer chamber (23) that are sequentially connected on the outer periphery of the explosion relief section (16). An explosion shock isolation plate (24) is provided in the explosion relief section (16). The buffer chamber (23) is woven with heat-resistant materials. A slag discharge mechanism is provided in the pre-collection section (17).

2. The integrated heat recovery heat exchanger device according to claim 1, characterized in that, The opening of the gas nozzle (20) is in the shape of a trapezoidal chamber. The gas nozzle (20) is inclined toward the direction of flue gas outflow. A fitting block (25) is provided between adjacent gas nozzles (20). An annular converging ring is formed between the fitting block (25) and the gas nozzle (20).

3. The integrated heat recovery heat exchanger device according to claim 2, characterized in that, The fitting block (25) and the gas nozzle (20) are spliced by a mortise and tenon structure with heat shrinkage interference fit, and the fitting block (25) and the gas nozzle (20) are fixed to the inner wall of the auxiliary combustion section (15) by riveting.

4. The integrated heat recovery heat exchanger device according to claim 2, wherein, A preheating section (26) that starts to coil from the auxiliary combustion section (15) is provided on the pumping intake pipe (19). The pumping intake pipe (19) is a metal pipe. The intake end (12) of the pumping intake pipe (19) is communicated with the outside and is equipped with a one-way valve.

5. The integrated heat recovery heat exchanger device according to claim 1, characterized in that, Two explosion shock isolation plates (24) are provided and are arranged oppositely. The two explosion shock isolation plates (24) are fixed to both ends of the inner cavity of the explosion relief section (16) by a sliding rod (27). The sliding rod (27) is slidably inserted into the inner cavity of the explosion relief section (16) and a return spring (28) is provided at the end. The return spring (28) has a tendency to move the explosion shock isolation plate (24) toward the inner cavity of the explosion relief section (16) and away from the port of the explosion relief section (16).

6. The integrated heat recovery heat exchanger device according to claim 5, characterized in that, A high-temperature resistant rubber layer is laid on the outer periphery of the buffer chamber (23). A plurality of tightening springs (31) are wound around the outer periphery of the buffer chamber (23). The tightening springs (31) have a tendency to maintain the buffer chamber (23) in a contracted state.

7. The integrated heat recovery heat exchanger device according to claim 6, characterized in that, The pressure relief mechanism includes a pressure relief pipe (29) provided on the outer periphery of the explosion-proof section (16). The end of the pressure relief pipe (29) is communicated with the buffer chamber (23). An impact diaphragm (30) is detachably connected to the pressure relief pipe (29), and the critical value of the breaking pressure of the impact diaphragm (30) > 1.5 atm.

8. A waste heat recovery integrated heat exchanger device according to claim 1, characterized in that, The slag discharge mechanism includes an installation through groove (32) provided in the pre-collection section (17). A plurality of metal meshes (33) are arrayed in the installation through groove (32). The surface of the metal mesh (33) is distributed with wrinkles. The laying direction of the metal mesh (33) is the same as the flue gas flow direction. Both ends of the installation through groove (32) are connected to the collection section through flanges.

9. The integrated heat recovery heat exchanger device according to claim 8, characterized in that, A slag receiving portion (34) protruding downward is provided in the middle of the installation through groove (32).

10. The integrated heat recovery heat exchanger device according to claim 1, characterized in that, Heat-insulating and fire-proof cotton is laid on the outer periphery of the air inlet end (12).

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