Reciprocating spiral mixed-flow type efficient hot blast stove

Abstract

The utility model provides a reciprocating spiral mixed flow type efficient hot blast stove, which comprises a stove body and a heat exchanger used for being installed on the stove body, the stove body comprises a first combustion chamber, a flow guide cover and a second combustion chamber which are connected in sequence, and a combustion-supporting mechanism used for inputting combustion-supporting gas into the first combustion chamber and the second combustion chamber is installed on the stove body; the heat exchanger is of a spiral structure, and a spiral fresh air flow channel is arranged in the heat exchanger. A hot air gap of a double-helix structure is formed between the adjacent outer walls of the heat exchanger, wherein the hot air gap and the fresh air flow channel jointly form a stacked and wound hot air gap of a double-helix structure. The hot air gaps are separated to form a plurality of hot air cavities; the adjacent hot air cavities are communicated end to end to form a continuous S-shaped hot air flow channel; the hot blast stove can solve the problems that carbonized particles are left in combustion tail gas generated in the hot blast stove in the prior art, and the carbonized particles are accumulated in the heat exchanger and the ash collecting bin in the process of flowing along with the tail gas and are inconvenient to clean.

Description

Technical Field

[0001] The utility model and the technical field of heating equipment particularly relate to a reciprocating spiral mixed flow type high-efficiency hot blast furnace. Background Art

[0002] Hot air stoves are widely used in people's production and life. Their working method is to use the heat released by fuel combustion to heat the air through high-temperature flue gas, so that the air temperature reaches the use standard. They are used in domestic heating, industrial production, thermal curing, grain drying and other fields. The overall structure of the hot air stove can be divided into two parts. One part is the combustion chamber, which is the heat generating part of fuel combustion, and the other part is the heat exchanger, which is a structural device that exchanges the heat carried by the high-temperature gas generated in the combustion chamber with the fresh air from the outside. The fresh air with a lower temperature from the outside exchanges heat with the high-temperature flue gas generated in the combustion chamber in the heat exchanger, and is heated to form hot air.

[0003] The high-temperature gas generated in the combustion chamber of the existing hot blast furnace flows in the form of an air flow beam in the smoke pipe, dissipating heat through the outer surface of the smoke pipe; while the fresh air flows through the surface of the smoke pipe to absorb heat, and its heat dissipation area is small. The heat exchange smoke pipe of the heat exchange structure is perpendicular to the wind direction of the fresh air, and turbulence is easily generated on the leeward side of the smoke pipe and the part that obstructs the airflow, resulting in a large wind resistance of the fresh air, resulting in low efficiency of heat exchange and thermal energy utilization. In order to solve the problems existing in the prior art, the utility model with publication number CN112050468A discloses a spiral plate type internal combustion high-efficiency hot blast furnace (hereinafter referred to as prior art 1), which includes The hot blast furnace includes a furnace body, in which a combustion chamber and a spiral plate heat exchanger are arranged. The combustion chamber is arranged in the middle of the lower part of the furnace body, and the spiral plate heat exchanger is arranged on the upper periphery of the combustion chamber. The spiral plate heat exchanger is a plate structure with a spiral layer distribution around the central axis of the furnace body. The heat exchanger is provided with a fresh cold air inlet and a combustion exhaust gas outlet. The plate structure includes a hot air gap and a fresh air cavity. The fresh air cavity and the fresh air cavity are connected with the fresh hot air outlet. The fresh hot air outlet is arranged on the side wall of the furnace body, and an ash collecting bin is provided at the bottom of the hot air gap.

[0004] The hot blast furnace in the prior art 1 is capable of exchanging heat with the combustion exhaust gas by setting a plate structure with spiral layered distribution; however, carbonized particles will remain in the combustion exhaust gas generated in the hot blast furnace in the prior art 1, and the carbonized particles will accumulate in the heat exchanger and the ash collecting bin during the flow of the exhaust gas. The ash collecting bin in the prior art has many units and a small volume, which is not easy to clean. Utility Model Content

[0005] The purpose of the utility model is to provide a reciprocating spiral mixed flow high-efficiency hot blast furnace, which, during actual use, can solve the problem in the prior art that carbonized particles will remain in the combustion exhaust gas generated in the hot blast furnace, and the carbonized particles will accumulate in the heat exchanger and ash collection bin during the flow of the exhaust gas, making it difficult to clean.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A reciprocating spiral mixed flow high-efficiency hot blast furnace, comprising a furnace body and a heat exchanger mounted on the furnace body, wherein the furnace body comprises a first combustion chamber, a flow guide cover, and a second combustion chamber connected in sequence, and a combustion-supporting mechanism is mounted on the furnace body for inputting combustion-supporting gas into the first combustion chamber and the second combustion chamber;

[0008] The heat exchanger has a spiral structure, and a spiral fresh air flow channel is provided inside the heat exchanger; a hot air gap is formed between adjacent outer walls of the heat exchanger, and together with the fresh air flow channel, it forms a double helical structure of stacked and intertwined hot air gaps; the hot air gaps are divided to form a plurality of hot air cavities; adjacent hot air cavities are interconnected end to end to form a continuous S-shaped hot air flow channel;

[0009] A plurality of ash collecting bins communicated with the outside are provided at the lower end of the hot air cavity, and adjacent hot air cavities share one ash collecting bin.

[0010] Preferably, the combustion-supporting mechanism includes a first combustion-supporting system and a second combustion-supporting system connected to the first combustion-supporting system, the first combustion-supporting system includes a first air inlet pipe and a first bellows, the first bellows is arranged at the bottom end of the first combustion chamber and is connected to the first combustion chamber, the first air inlet pipe is connected to the first bellows, and the end of the first air inlet pipe away from the first bellows extends outside the furnace body, a blower is installed at the end of the first air inlet pipe away from the first bellows, and a furnace bridge is installed between the first combustion chamber and the first bellows.

[0011] Preferably, the second combustion-supporting system includes a second air inlet pipe and a second wind box, the second wind box is installed on the second combustion chamber and communicates with the second combustion chamber, and the second wind box is connected to the first wind box through the second air inlet pipe.

[0012] Preferably, a feeding mechanism is installed on the furnace body, and the feeding mechanism includes a driving device, a spiral feeding pipe, a spiral feeding blade and a throwing inclined pipe; the spiral feeding pipe is installed on the furnace body, and the spiral feeding blade is rotatably installed on the spiral feeding pipe; the feeding end of the throwing inclined pipe is connected to the discharging end of the spiral feeding pipe located inside the furnace body, and the discharging end of the throwing inclined pipe is connected to the first combustion chamber, and the driving device is used to drive the spiral feeding blade to rotate, and a feeding port is provided at one end of the spiral feeding pipe located outside the furnace body.

[0013] Preferably, a slag cleaning port is provided on the furnace body, and a slag cleaning channel is provided in the furnace body; the slag cleaning port is connected to the first combustion chamber through the slag cleaning channel.

[0014] Preferably, a cleaning port cover is installed at the top of the hot air cavity.

[0015] Preferably, an inspection cover is coaxially arranged on the heat exchanger.

[0016] Preferably, a first heat dissipation fin is provided in the fresh air flow channel.

[0017] Preferably, second heat dissipation fins are connected to outer surfaces of the first combustion chamber and the second combustion chamber.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, combustion-supporting air is input into the second combustion chamber through the combustion-supporting mechanism, and a secondary combustion section is added, which can perform secondary combustion on the carbonized particles remaining in the exhaust gas. The method of enlarging the upper cavity of the combustion chamber can reduce the flow rate of the high-temperature exhaust gas in the second combustion chamber, thereby further gasifying and burning the fuel.

[0020] By arranging the fresh air flow channel in a spiral shape, the path of the fresh air moving in the heat exchanger can be increased, further increasing the heat exchange time and heat exchange area between the fresh air moving inward in a spiral and the combustion exhaust gas moving from inward to outward, thereby achieving a better heat exchange effect and further improving the thermal energy utilization efficiency;

[0021] By changing the flow direction of the exhaust gas generated by the combustion, the number of the ash collecting bins is reduced, the volume of the ash collecting bins is increased, and the path of the ash cleaning port is widened, thereby achieving the purpose of faster and simpler ash cleaning and reducing the frequency of ash cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a perspective view of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the present invention.

[0025] Figure 3It is a structural schematic diagram of the ash collecting bin in the present invention.

[0026] Figure 4 Schematic diagram of the connection relationship between the heat exchanger and the first combustion chamber in the present invention.

[0027] Figure 5 It is a top view of the present invention.

[0028] Figure 6 It is a structural schematic diagram of the driving device in the present invention.

[0029] Figure 7 It is a structural schematic diagram of the fresh air inlet in the present invention.

[0030] Figure 8 For the present invention Figure 3 Cross-section of AA.

[0031] Figure 9 For the present invention Figure 4 Cross-section of the BB.

[0032] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0033] 101-furnace body, 102-heat exchanger, 103-first combustion chamber, 104-air deflector, 105-second combustion chamber, 106-combustion support mechanism, 107-fresh air flow channel, 108-hot air cavity, 109-hot air flow channel, 110-ash collection bin, 111-exhaust air outlet, 112-fresh air inlet, 113-combustion exhaust gas flow direction, 114-fresh air flow direction, 115-ash cleaning port, 116-cleaning port cover, 117-sealing cover, 118-emergency heat exhaust port, 119-fresh air outlet, 120-first heat dissipation fin, 121-combustion exhaust gas flow path, 122-fresh air flow path, 123- Bending part, 124-first combustion-supporting system, 125-second combustion-supporting system, 126-first air inlet pipe, 127-first bellows, 128-second air inlet pipe, 129-second bellows, 130-slag cleaning port, 131-slag cleaning channel, 132-unloading mechanism, 133-driving device, 134-spiral feeding pipe, 135-spiral feeding blade, 136-throwing inclined pipe, 137-driving gear, 138-driven gear, 139-driving motor, 140-chain, 141-fire viewing furnace door, 142-igniter, 143-second heat dissipation fin, 144-inspection top cover, 145-fuel funnel, 146-furnace bridge. DETAILED DESCRIPTION

[0034] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0035] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0037] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0038] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0040] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0041] See Figures 1-9 This embodiment discloses a hot blast furnace, specifically a reciprocating spiral mixed flow high-efficiency hot blast furnace, comprising a furnace body 101 and a heat exchanger 102 for mounting on the furnace body 101. The furnace body 101 comprises a first combustion chamber 103, a flow guide hood 104, and a second combustion chamber 105 connected in sequence. A combustion-supporting mechanism 106 for inputting combustion-supporting gas into the first combustion chamber 103 and the second combustion chamber 105 is mounted on the furnace body 101.

[0042] The heat exchanger 102 has a spiral structure, and a spiral fresh air flow channel 107 is provided in the heat exchanger 102. A hot air gap is formed between adjacent outer walls of the heat exchanger 102, and together with the fresh air flow channel 107, it forms a stacked and wound double helical structure. The hot air gap is divided into a plurality of hot air cavities 108. Adjacent hot air cavities 108 are interconnected end to end to form a continuous S-shaped hot air flow channel 109.

[0043] A plurality of ash collecting bins 110 communicating with the outside are provided at the lower end of the hot air cavity 108 , and adjacent hot air cavities 108 share one ash collecting bin 110 .

[0044] In this example, the heat exchanger 102 is coaxially mounted on the furnace body 101 and seamlessly connected to the furnace body 101. The spiral fresh air flow channel 107 formed inside the heat exchanger 102 and the spiral hot air gap formed between the adjacent outer walls of the heat exchanger 102 together constitute a double helix structure arranged in a stacked and winding manner; the hot air flow channel 109 and the fresh air flow channel 107 form two independent channel units; the fresh air flow channel 107 is provided with a fresh air inlet 112 and a fresh air outlet 119 for communicating with the outside world, and the hot air flow channel 109 is provided with an exhaust gas inlet for communicating with the second combustion chamber 105 arranged in the furnace body 101 and an exhaust gas outlet 111 for communicating with the outside world; a blower for inputting fresh air flow into the fresh air flow channel 107 is installed at the fresh air inlet 112, and an exhaust fan for extracting combustion exhaust gas is installed at the exhaust gas outlet 111.

[0045] The deflector 104 is a truncated cone-shaped structure with a small bottom and a large top. The deflector 104 is provided with an air outlet, and the combustion-supporting mechanism 106 is connected to the second combustion chamber 105 through the air outlet; the furnace body 101 is equipped with an igniter 142 extending into the first combustion chamber 103. After adding fuel to the first combustion chamber 103, the fuel can be ignited by the igniter 142, so that high-temperature combustion exhaust gas is generated after the fuel burns; combustion-supporting air can be introduced into the first combustion chamber 103 and the second combustion chamber 105 through the combustion-supporting mechanism 106, so as to further improve the combustion effect and combustion efficiency of the fuel; the first combustion chamber 103, the deflector 104 and the second combustion chamber 105 are seamlessly connected as one, and the cavity formed in the second combustion chamber 105 is larger than the cavity formed in the first combustion chamber 103; the high-temperature exhaust gas generated in the first combustion chamber 103 and the semi-burned carbon particles in the exhaust gas rise to the first combustion chamber 103. When the combustion chamber 103 and the second combustion chamber 105 are connected, the combustion-supporting mechanism 106 inputs combustion-supporting air into the second combustion chamber 105 through the air outlet, which can supplement combustion oxygen for the half-burned carbonized particles for a second time; since the cavity formed in the second combustion chamber 105 is larger than the cavity formed in the first combustion chamber 103, the flow velocity of the half-burned carbonized particles in the combustion exhaust gas in the second combustion chamber 105 is reduced and tumbles up and down to completely burn, and the guide cover 104 can guide the combustion exhaust gas; when the combustion-supporting mechanism 106 inputs combustion-supporting gas into the second combustion chamber 105 through the air outlet, the carbonized particles remaining in the combustion gas in the second combustion chamber 105 after being guided by the guide cover 104 can be burned and gasified again under the action of the combustion-supporting gas, further reducing the content of carbonized particles in the combustion exhaust gas; by setting the guide cover 104, the secondary combustion time of the combustion gas can be increased, thereby achieving a better combustion effect.

[0046] After the blower inputs fresh air into the fresh air channel, a spiral fresh air flow is formed, and the fresh air flow flows from the outside to the inside toward the axial direction of the heat exchanger 102 to the channel formed between the outer wall of the first combustion chamber 103 and the outer wall of the second combustion chamber 105 and the heat exchanger 102, and then is discharged through the fresh air outlet 119 arranged on the furnace body 101; while the fresh air flow moves from the outside to the inside in the fresh air flow channel 107, the combustion exhaust gas generated when the fuel in the first combustion chamber 103 and the second combustion chamber 105 is burned is discharged from the inside to the outside and from the top to the bottom from the second combustion chamber 103 under the action of the exhaust fan. After turning back and moving downward from the top of the combustion chamber 105 into the hot air cavity, the combustion exhaust gas moves from bottom to top along the S-shaped hot air flow channel 109 to the top of any hot air cavity 108 under the action of the exhaust fan, and then crosses into the adjacent hot air cavity 108 and flows downward, repeating the movement several times to reach the outermost space of the heat exchanger 102 and then being discharged through the exhaust gas outlet 111; by making the fresh air channel spirally arranged, the path of the fresh air moving in the heat exchanger 102 can be increased, further increasing the heat exchange time and heat exchange between the fresh air moving from the outside to the inside and the combustion exhaust gas moving from the inside to the outside. The heat area can achieve better heat exchange effect and further improve the thermal energy utilization efficiency; after the fresh air is heated by heat exchange with the combustion exhaust gas, the hot air is blown out from the fresh air outlet 119 to the heat-using equipment, and the combustion exhaust gas is discharged to the external environment at a lower temperature after heat exchange; by changing the flow direction of the exhaust gas generated by the combustion, the one hot air cavity 108 corresponding to one ash collecting bin 110 for each spiral circle of the fresh air flow channel 107 in the prior art can be changed to one ash collecting bin 110 for every two spiral circles of the fresh air flow channel 107, which shares one ash collecting bin 110 with two hot air cavities 108, thereby reducing the number of ash collecting bins 110 and simplifying the manufacturing process. The operation process is improved, material consumption is reduced, and the cleaning operation is convenient; the particulate matter carried by the combustion exhaust gas is deposited in the ash collecting bin 110 under the action of gravity as the combustion exhaust gas moves, and can be centrally cleaned through the ash collecting bin 110; by making the blower supply air into the fresh air channel at positive pressure and the exhaust fan exhaust air at negative pressure, the heat exchanger 102 can operate under negative pressure and the fresh air system can operate under positive pressure, thereby eliminating the fire hazard caused by the overflow of combustion sparks under special circumstances and the possibility of material being contaminated by exhaust gas, ensuring the safety of operation, and having strong practicality.

[0047] In some embodiments, the heat exchanger 102 is connected to a plurality of partition plates, which are used to divide the hot air gap to form the hot air cavity 108. The partition plates can separate the hot air gap into the hot air cavity 108, and adjacent hot air cavities 108 are connected to each other through the partition plates to form an S-shaped hot air flow channel 109.

[0048] In some embodiments, the heat exchanger 102 is provided with a bent portion 123. Adjacent bent portions 123 are closely contacted or connected to separate the hot air gap to form the hot air cavity 108. In this embodiment, there are multiple bent portions 123. When adjacent bent portions 123 are closely contacted, they can separate the hot air gap into the hot air cavity 108. Adjacent hot air cavities 108 are connected to each other end to end through the partition plate to form an S-shaped hot air flow channel 109.

[0049] In some embodiments, the ash collecting bins 110 are arranged in layers from top to bottom. There are several ash collecting bins 110, and the ash collecting bins 110 are arranged in layers from bottom to bottom. The particulate matter carried by the combustion exhaust gas is deposited in the ash collecting bins 110 by gravity during the movement of the combustion exhaust gas, and can be cleaned in a centralized manner through the ash collecting bins 110.

[0050] In some embodiments, the ash bin 110 is provided with an ash cleaning port 115 for communicating with the interior of the ash bin 110. A sealing cover plate 117 is mounted on the ash cleaning port 115. When the heat exchanger 102 is in operation, the ash cleaning port 115 can be sealed by the sealing cover plate 117. When the heat exchanger 102 completes heat exchange and particulate matter accumulated in the ash bin 110 needs to be cleaned, the sealing cover plate 117 is opened to remove the particulate matter in the ash bin 110 through the ash cleaning port 115 and clean the ash bin 110.

[0051] In some embodiments, the ash cleaning ports 115 are arranged at equal intervals along the circumference of the ash collecting bin 110. In this embodiment, each ash collecting bin 110 is provided with a ash cleaning port 115 for communicating with the ash collecting bin 110. There are three ash cleaning ports 115, which are arranged at equal intervals along the circumference of the ash collecting bin 110. This allows the user to simultaneously clean particulate matter accumulated in the ash collecting bin 110 through the three ash cleaning ports 115, further improving cleaning efficiency and cleaning effect.

[0052] In some embodiments, the heat exchanger 102 is provided with an emergency heat exhaust port 118. The emergency heat exhaust port 118 is provided at the front end of the exhaust outlet 111. During the operation of the heat exchanger 102, if an emergency such as excessive temperature or abnormal pressure in the furnace body 101 occurs, the emergency heat exhaust port 118 can be quickly opened to release the high-temperature gas and heat in the furnace in time, thereby reducing the temperature and pressure in the furnace, thereby avoiding damage to the heat exchanger 102 due to overheating, or even causing safety accidents such as explosions.

[0053] In some embodiments, the combustion-supporting mechanism 106 includes a first combustion-supporting system 124 and a second combustion-supporting system 125 connected to the first combustion-supporting system 124. The first combustion-supporting system 124 includes a first air inlet pipe 126 and a first wind box 127. The first wind box 127 is arranged at the bottom end of the first combustion chamber 103 and is connected to the first combustion chamber 103. The first air inlet pipe 126 is connected to the first wind box 127, and the end of the first air inlet pipe 126 away from the first wind box 127 extends to the outside of the furnace body 101. A blower is installed at the end of the first air inlet pipe 126 away from the first wind box 127, and a furnace bridge 146 is installed between the first combustion chamber 103 and the first wind box 127. In this embodiment, the furnace bridge 146 is a conventional grille structure used for ash leakage in the prior art, and the fuel is placed on the furnace bridge 146; the first wind box 127 is a conventional equalizing pressure wind box in the prior art; after the blower box inputs combustion-supporting air into the first wind box 127, a part of the combustion-supporting air passes through the furnace bridge 146 and is input into the first combustion chamber 103, thereby improving the combustion effect and combustion efficiency of the fuel in the first combustion chamber 103; the other part of the combustion-supporting air is input into the second combustion chamber 105 through the second combustion-supporting system 125, so that the carbonized particles remaining in the combustion gas in the second combustion chamber 105 can be burned and gasified again under the action of the combustion-supporting gas, thereby further reducing the content of carbonized particles in the combustion exhaust gas.

[0054] In some embodiments, the second combustion-supporting system 125 includes a second air inlet pipe 128 and a second wind box 129. The second wind box 129 is installed on the second combustion chamber 105 and communicates with the second combustion chamber 105. The second wind box 129 is connected to the first wind box 127 through the second air inlet pipe 128. The second wind box 129 is communicated with the second combustion chamber 105 through the air outlet. The second wind box 129 is a conventional pressure-equalizing wind box in the prior art. The combustion exhaust in the first combustion box passes through the second air inlet pipe 128, the second wind box 129 and the air outlet in sequence and then enters the second combustion chamber 105, so that the carbonized particles remaining in the combustion gas in the second combustion chamber 105 can be burned and gasified again under the action of the combustion-supporting gas.

[0055] In some embodiments, a unloading mechanism 132 is installed on the furnace body 101, and the unloading mechanism 132 includes a driving device 133, a spiral feeding tube 134, a spiral feeding blade 135 and a throwing inclined tube 136; the spiral feeding tube 134 is installed on the furnace body 101, and the spiral feeding blade 135 is rotatably installed on the spiral feeding tube 134; the feeding end of the throwing inclined tube 136 is connected to the discharging end of the spiral feeding tube 134 located in the furnace body 101, and the discharging end of the throwing inclined tube 136 is connected to the first combustion chamber 103, and the driving device 133 is used to drive the spiral feeding blade 135 to rotate, and a feeding port is provided at one end of the spiral feeding tube 134 located outside the furnace body 101. After granular fuel is added to the spiral feed pipe 134 through the feed port, the spiral feed blade 135 rotates under the drive of the first drive device 133, so that the granular fuel entering the spiral feed pipe 134 can be pushed by the spiral feed blade 135 and guided by the throwing inclined pipe 136 to be discharged onto the furnace bridge 146. The igniter 142 ignites the fuel discharged onto the furnace bridge 146 to generate high-temperature combustion exhaust gas. In this embodiment, the igniter 142 is a conventional adjustable igniter in the prior art, and its structure and function will not be elaborated on here. After the driving motor 139 drives the driving gear 137 to rotate, the driven gear 138 rotates together with the driving gear 137 under the drive of the chain 140, so that the spiral feeding blade 135 fixedly connected to the driven gear 138 rotates to realize feeding; in this embodiment, the driving motor 139 is a speed-regulating motor with adjustable speed in the prior art; by adjusting the speed of the driving motor 139, the unloading amount of the unloading mechanism 132 can be adjusted according to actual needs.

[0056] In some embodiments, a fuel funnel 145 is installed at the feed port of the spiral feeding tube 134. The provision of the fuel funnel 145 facilitates the addition of fuel into the spiral feeding tube 134.

[0057] In some embodiments, a fire observation door 141 is provided on the furnace body 101. Through the fire observation door 141, the fire in the first combustion chamber 103 can be observed in real time.

[0058] In some embodiments, the furnace body 101 is provided with a slag removal port 130, and a slag removal channel 131 is provided within the furnace body 101. The slag removal channel 131 is inclined toward the slag removal port 130, and the slag removal port 130 is connected to the first combustion chamber 103 through the slag removal channel 131. After the combustion-supporting gas enters the first wind box 109 through the first air inlet pipe 108 and moves upward into the first combustion chamber 102, it passes through the combustion material layer placed on the furnace bridge 125. The combustion-supporting air can increase the oxygen supply, making the fuel layer burn more fully, thereby improving the efficiency and speed of combustion.

[0059] In some embodiments, a cleaning port cover 116 is installed at the top of the hot air cavity 108. The cleaning port cover 116 is arranged corresponding to the combustion exhaust return point and is detachably connected to the hot air cavity 108 via bolts. During the heat exchange between the combustion exhaust gas and the fresh air, the cleaning port cover 116 seals the hot air cavity 108 to prevent the combustion exhaust gas from escaping. After the fresh air and the combustion exhaust gas have completed the heat exchange, the cleaning port can be removed to facilitate the user to clean impurities accumulated on the outer wall of the heat exchanger 102.

[0060] In some embodiments, an inspection cover 144 is coaxially provided on the heat exchanger 102. A conical return port is provided on the top of the second combustion chamber 105 for directing the combustion exhaust gas in the second combustion chamber 105 into the hot air cavity 108. The inspection cover 144 is detachably mounted on the heat exchanger 102 at a position corresponding to the conical return port by bolts. During the heat exchange between the combustion exhaust gas and the fresh air, the inspection cover 144 seals the heat exchanger 102 and the furnace body 101 to prevent the combustion exhaust gas from escaping. After the fresh air and the combustion exhaust gas have completed the heat exchange, the inspection cover 144 can be removed to facilitate the user to inspect and clean the first combustion chamber 103 and the second combustion chamber 105.

[0061] In some embodiments, a first heat dissipation fin 120 is provided in the fresh air flow channel 107. The first heat dissipation fin 120 is arranged horizontally and fixedly connected to the inner wall of the fresh air flow channel 107. The provision of the first heat dissipation fin 120 can further improve the heat exchange effect between the fresh air in the fresh air flow channel 107 and the combustion exhaust gas.

[0062] In some embodiments, second heat dissipation fins 143 are connected to the outer surfaces of the first combustion chamber 103 and the second combustion chamber 105. The second heat dissipation fins 143 are vertically arranged and fixedly connected to the outer walls of the first combustion chamber 103 and the second combustion chamber 105. By providing the second heat dissipation fins 143, when the exhaust gas, which has been heated after heat exchange with the combustion exhaust gas, passes through the gap between the heat exchanger 102 and the furnace body 101, the second heat dissipation fins 143 can exchange heat with the furnace body 101 through the gap between the heat exchanger 102 and the furnace body 101, further improving the heating effect of the fresh air.

[0063] In some embodiments, a heat insulating material is provided at the bottom of the inspection cover 144. The provision of the heat insulating material can prevent burns to the user when removing the cover, thereby improving safety.

[0064] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A reciprocating spiral mixed flow high efficiency hot blast stove, characterized by: The invention comprises a furnace body (101) and a heat exchanger (102) for being mounted on the furnace body (101); the furnace body (101) comprises a first combustion chamber (103), a flow guide cover (104), and a second combustion chamber (105) connected in sequence; and a combustion-supporting mechanism (106) for inputting combustion-supporting gas into the first combustion chamber (103) and the second combustion chamber (105) is mounted on the furnace body (101); The heat exchanger (102) is a spiral structure, and a spiral fresh air flow channel (107) is provided in the heat exchanger (102); a hot air gap is formed between adjacent outer walls of the heat exchanger (102), and together with the fresh air flow channel (107), a double helical structure is formed in a stacked and wound arrangement; the hot air gap is divided to form a plurality of hot air cavities (108); adjacent hot air cavities (108) are interconnected end to end to form a continuous S-shaped hot air flow channel (109); A plurality of ash collecting bins (110) communicating with the outside are provided at the lower end of the hot air cavity (108), and adjacent hot air cavities (108) share one ash collecting bin (110).

2. The reciprocating spiral mixed flow high-efficiency hot blast stove according to claim 1, characterized in that: The combustion-supporting mechanism (106) includes a first combustion-supporting system (124) and a second combustion-supporting system (125) connected to the first combustion-supporting system (124), the first combustion-supporting system (124) includes a first air inlet pipe (126) and a first wind box (127), the first wind box (127) is arranged at the bottom end of the first combustion chamber (103) and is connected to the first combustion chamber (103), the first air inlet pipe (126) is connected to the first wind box (127), and the end of the first air inlet pipe (126) away from the first wind box (127) extends to the outside of the furnace body (101), the end of the first air inlet pipe (126) away from the first wind box (127) is installed with a blower, and a furnace bridge (146) is installed between the first combustion chamber (103) and the first wind box (127).

3. The reciprocating spiral mixed flow high-efficiency hot blast stove according to claim 2, characterized in that: The second combustion-supporting system (125) includes a second air inlet pipe (128) and a second wind box (129). The second wind box (129) is installed on the second combustion chamber (105) and communicates with the second combustion chamber (105). The second wind box (129) is connected to the first wind box (127) through the second air inlet pipe (128).

4. The reciprocating spiral mixed flow high-efficiency hot blast stove according to claim 1, characterized in that: A feeding mechanism (132) is installed on the furnace body (101), and the feeding mechanism (132) includes a driving device (133), a spiral feeding pipe (134), a spiral feeding blade (135) and a throwing inclined pipe (136); the spiral feeding pipe (134) is installed on the furnace body (101), and the spiral feeding blade (135) is rotatably installed on the spiral feeding pipe (134); the feeding end of the throwing inclined pipe (136) is connected to the discharging end of the spiral feeding pipe (134) located in the furnace body (101), and the discharging end of the throwing inclined pipe (136) is connected to the first combustion chamber (103); the driving device (133) is used to drive the spiral feeding blade (135) to rotate, and a feeding port is provided at one end of the spiral feeding pipe (134) located outside the furnace body (101).

5. The reciprocating spiral mixed flow high-efficiency hot blast stove according to claim 1, characterized in that: A slag cleaning port (130) is provided on the furnace body (101), and a slag cleaning channel (131) is provided in the furnace body (101); the slag cleaning port (130) is communicated with the first combustion chamber (103) through the slag cleaning channel (131).

6. The reciprocating spiral mixed flow high-efficiency hot blast stove according to claim 1, characterized in that: A cleaning port cover (116) is installed at the top of the hot air cavity (108).

7. The reciprocating spiral mixed flow high-efficiency hot blast stove according to claim 1, characterized in that: An inspection cover (144) is coaxially arranged on the heat exchanger (102).

8. The reciprocating spiral mixed flow high-efficiency hot blast stove according to claim 1, characterized in that: A first heat dissipation fin (120) is provided in the fresh air flow channel (107).

9. The reciprocating spiral mixed flow high-efficiency hot blast stove according to claim 1, characterized in that: Second heat dissipation fins (143) are connected to the outer surfaces of the first combustion chamber (103) and the second combustion chamber (105).

10. The reciprocating spiral mixed flow high-efficiency hot blast stove according to claim 7, characterized in that: The bottom end of the inspection cover (144) is provided with heat insulation material.

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