Hot blast stove with waste heat recovery function

Abstract

The utility model discloses a hot blast stove with a waste heat recovery function, which comprises a bottom plate, a material box fixedly mounted at the top of the bottom plate, a combustion box fixedly mounted at the top of the material box, a main exhaust pipe fixedly mounted at the top of the combustion box, and a recovery mechanism arranged at the top of the bottom plate and used for recovering heat of the combustion box. The recycling mechanism comprises a water tank, a coil pipe, a drainage pipe and a drainage valve. The water tank is fixedly installed on the top of the bottom plate and located on the right side of the material box. The energy-saving and environment-friendly boiler is reasonable in design, clean water in the coil pipe can be used for recycling heat of the combustion box, hot water enters the water tank through the drainage pipe to preheat airflow blown by the fan, combustion is promoted, the combustion efficiency is improved, waste gas generated by combustion is extracted to enter the first spiral pipe, then the clean water in the water tank is heated, and the energy-saving and environment-friendly effects are achieved. And the preheating effect on the inlet air is further improved, hot water in the water tank can be conveyed to a needed place to be utilized, and the utilization rate of the recycled heat is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery of hot blast stoves, in particular to a hot blast stove with waste heat recovery function. Background Technique

[0002] The hot blast stove is a thermal power machine, which began to be widely used in China at the end of the 1970s. It has become a replacement product for electric heat sources and traditional steam power heat sources in many industries. There are many varieties and complete series of hot blast stoves. They are divided into two types: hand-fired and machine-fired according to the coal feeding method, and are divided into coal, oil, gas stoves, etc. according to the fuel type.

[0003] After retrieval, a hot blast stove for a grain dryer with waste heat recovery function announced in the Chinese patent announcement with the announcement number of CN220708011U has the following technical key points: including a furnace body assembly, the furnace body assembly includes a drying furnace body and a heat recovery box. One side top of the front surface of the heat recovery box is provided with a water outlet, and the other side bottom of the front surface of the heat recovery box is provided with a water inlet. A flue gas pipeline is arranged on the top of the heat recovery box. It also includes a lifting structure and an ash cleaning structure. The lifting structure is installed at the bottom of the drying furnace body, and the ash cleaning structure is arranged inside the heat recovery box.

[0004] The above solution is found to still have at least the following defects in actual operation: when the hot blast stove burns to generate heat, a large amount of heat energy radiates and is lost outward through the furnace body itself, resulting in poor heat recovery and utilization rate. For this reason, we propose a hot blast stove with waste heat recovery function to solve the above problems. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a hot blast stove with waste heat recovery function, which solves the problem that when the hot blast stove burns to generate heat, a large amount of heat energy radiates and is lost outward through the furnace body itself, resulting in poor heat recovery and utilization rate.

[0007] (2) Technical Solutions

[0008] To achieve the above purpose, the utility model provides the following technical solution: a hot blast stove with waste heat recovery function, including a bottom plate. A material box is fixedly installed on the top of the bottom plate. A combustion box is fixedly installed on the top of the material box. A main exhaust pipe is fixedly installed on the top of the combustion box. A recovery mechanism for recovering heat from the combustion box is arranged on the top of the bottom plate.

[0009] Preferably, the recovery mechanism includes a water tank, a coil pipe, a drain pipe and a drain valve. The water tank is fixedly installed at the top of the bottom plate and on the right side of the material box. The water tank is filled with clean water. The coil pipe is fixedly installed on the combustion box. The drain pipe is fixedly installed at the outlet end of the coil pipe. One end of the drain pipe away from the coil pipe extends into the water tank. The drain valve is fixedly installed on the drain pipe.

[0010] Preferably, the recovery mechanism further includes a secondary exhaust pipe, a first spiral pipe, an exhaust gas collection box, an air extraction pump and an air extraction pipe. The secondary exhaust pipe is fixedly installed on the top of the combustion box. The first spiral pipe is fixedly installed at one end of the secondary exhaust pipe away from the combustion box and is located in the water tank. The exhaust gas collection box is movably installed at the top of the bottom plate and on the right side of the water tank. The air extraction pump is fixedly installed on the top of the exhaust gas collection box. The air extraction pipe is fixedly installed at the input end of the air extraction pump. One end of the air extraction pipe away from the air extraction pump is fixedly connected to the first spiral pipe.

[0011] Preferably, a heat insulation protection layer is fixedly installed on the coil pipe. A water inlet pipe is fixedly installed on the top of the coil pipe. A water inlet valve is fixedly installed on the water inlet pipe.

[0012] Preferably, a blower is fixedly installed at the top of the bottom plate on the right side of the water tank. An air blowing pipe is fixedly installed at the output end of the blower. The left end of the air blowing pipe extends into the water tank and is fixedly installed with a second spiral pipe. An air supply pipe is fixedly installed on the right side of the material box. The right end of the air supply pipe is fixedly connected to the second spiral pipe.

[0013] Preferably, a water pump is fixedly installed at the top of the water tank. A water suction pipe is fixedly installed at the suction end of the water pump. One end of the water suction pipe away from the water pump extends into the water tank and is below the liquid level. A water delivery pipe is fixedly installed at the discharge end of the water pump.

[0014] Preferably, a thermometer is fixedly installed on the front side of the water tank.

[0015] (III) Beneficial effects

[0016] The utility model provides a hot blast stove with a waste heat recovery function, which has the following beneficial effects:

[0017] (1). For the hot blast stove with a waste heat recovery function, by utilizing the combined action of the water tank, the coil pipe, the drain pipe and the drain valve, the heat of the combustion box can be recovered by using the clean water in the coil pipe. The hot water enters the water tank through the drain pipe and preheats the air flow blown by the blower, which helps to promote combustion and improve the combustion efficiency.

[0018] (2). For the hot blast stove with a waste heat recovery function, by utilizing the combined action of the secondary exhaust pipe, the first spiral pipe, the exhaust gas collection box, the air extraction pump and the air extraction pipe, the exhaust gas generated by combustion can be extracted into the first spiral pipe, and then the clean water in the water tank can be heated, improving the preheating effect on the intake air.

[0019] (3) The hot blast stove with waste heat recovery function can transport the hot water in the water tank to the required place for utilization by the combined action of a water pump, a water suction pipe and a water delivery pipe, improving the utilization rate of the recovered heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structure schematic diagram of the present utility model;

[0021] Figure 2 It is a sectional structure schematic diagram of the front view of the present utility model;

[0022] Figure 3 It is a sectional three-dimensional structure schematic diagram of the present utility model.

[0023] In the figure: 1, bottom plate; 2, material box; 3, combustion box; 4, main exhaust pipe; 5, water tank; 6, coil pipe; 7, drain pipe; 8, drain valve; 9, auxiliary exhaust pipe; 10, first spiral pipe; 11, waste gas collection box; 12, air extraction pump; 13, air extraction pipe; 14, heat insulation protection layer; 15, water inlet pipe; 16, water inlet valve; 17, fan; 18, air blowing pipe; 19, second spiral pipe; 20, air supply pipe; 21, water pump; 22, water suction pipe; 23, water delivery pipe; 24, thermometer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] As Figures 1-3 shown, the present utility model provides a technical solution: a hot blast stove with waste heat recovery function, including a bottom plate 1, a material box 2 is fixedly installed on the top of the bottom plate 1, a combustion box 3 is fixedly installed on the top of the material box 2, a main exhaust pipe 4 is fixedly installed on the top of the combustion box 3, and a recovery mechanism for recovering the heat of the combustion box 3 is arranged on the top of the bottom plate 1.

[0026] In this embodiment, a fan 17 is fixedly installed on the top of the bottom plate 1 on the right side of the water tank 5, a blowing pipe 18 is fixedly installed at the output end of the fan 17, the left end of the blowing pipe 18 extends into the water tank 5 and is fixedly installed with a second spiral pipe 19, a air supply pipe 20 is fixedly installed on the right side of the material box 2, and the right end of the air supply pipe 20 is fixedly connected with the second spiral pipe 19.

[0027] In this embodiment, a water pump 21 is fixedly installed at the top of the above-mentioned water tank 5. A water suction pipe 22 is fixedly installed at the suction end of the water pump 21. One end of the water suction pipe 22 away from the water pump 21 extends into the water tank 5 and is located below the liquid level. A water delivery pipe 23 is fixedly installed at the discharge end of the water pump 21. A thermometer 24 is fixedly installed on the front side of the water tank 5.

[0028] In this embodiment, the above-mentioned recovery mechanism includes a water tank 5, a coil pipe 6, a drain pipe 7 and a drain valve 8. The water tank 5 is fixedly installed at the top of the bottom plate 1 and is located on the right side of the material box 2. The water tank 5 is filled with clear water. The coil pipe 6 is fixedly installed on the combustion box 3 and is filled with clear water. A heat insulation protective layer 14 is fixedly installed on the coil pipe 6. A water inlet pipe 15 is fixedly installed at the top of the coil pipe 6. A water inlet valve 16 is fixedly installed on the water inlet pipe 15. Clear water can be supplemented into the coil pipe 6 through the water inlet valve 16. The drain pipe 7 is fixedly installed at the outlet end of the coil pipe 6. One end of the drain pipe 7 away from the coil pipe 6 extends into the water tank 5. The drain valve 8 is fixedly installed on the drain pipe 7. The recovery mechanism further includes a secondary exhaust pipe 9, a first spiral pipe 10, an exhaust gas collection box 11, an air extraction pump 12 and an air extraction pipe 13. The secondary exhaust pipe 9 is fixedly installed at the top of the combustion box 3. The first spiral pipe 10 is fixedly installed at one end of the secondary exhaust pipe 9 away from the combustion box 3 and is located in the water tank 5. The exhaust gas collection box 11 is movably installed at the top of the bottom plate 1 and is located on the right side of the water tank 5. The air extraction pump 12 is fixedly installed at the top of the exhaust gas collection box 11. The exhaust gas in the combustion box 3 can be extracted through the first spiral pipe 10 into the exhaust gas collection box 11 by the air extraction pump 12. The air extraction pipe 13 is fixedly installed at the input end of the air extraction pump 12. One end of the air extraction pipe 13 away from the air extraction pump 12 is fixedly connected to the first spiral pipe 10.

[0029] In this embodiment, it should be noted that a control switch is provided at a suitable position on or beside the bottom plate 1. The air extraction pump 12, the fan 17, the water pump 21, the thermometer 24 and the control switch are electrically connected through wires. The control switch can be used to respectively control the power-on operation of the air extraction pump 12, the fan 17, the water pump 21 and the thermometer 24.

[0030] With the above structure, the hot blast stove with waste heat recovery function provided by the utility model can recover the heat of the combustion chamber 3 by using the clean water in the coil pipe 6. The hot water enters the water tank 5 through the drain pipe 7 to preheat the air flow blown by the fan 17, improving the combustion efficiency. It also extracts the waste gas generated by combustion into the first spiral pipe 10, thereby heating the clean water in the water tank 5 to further improve the preheating effect on the intake air. It can also transport the hot water in the water tank 5 to the places where it is needed for utilization, improving the utilization rate of the recovered heat. During specific use, open the water inlet valve 16 to add clean water into the coil pipe 6, control the combustion of the materials in the material box 2, and the heat generated by combustion raises the temperature of the combustion chamber 3, and then transfers the heat to the clean water in the coil pipe 6. When the temperature of the clean water is relatively high, open the drain valve 8 to introduce the hot water into the water tank 5, control the operation of the fan 17, and supply air to the material box 2. The air flow is preheated by the hot water in the water tank 5 when passing through the second spiral pipe 19. Hot air is lighter than cold air, so it will rise. The rising of hot air helps to promote combustion and increase the combustion temperature. Control the operation of the air extraction pump 12. The air extraction pump 12 extracts the waste gas above the combustion chamber 3 into the first spiral pipe 10 to heat the clean water in the water tank 5 and further improve the preheating effect on the air flow. Control the operation of the water pump 21. The water pump 21 extracts the hot water in the water tank 5 and transports it to the places where it is needed, improving the utilization rate of the recovered heat.

[0031] The above is only the specific implementation manner of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope recorded in the utility model can easily think of changes or substitutions, which should all be covered by the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A hot blast stove with waste heat recovery function, characterized in that: It includes a bottom plate (1). A material box (2) is fixedly installed on the top of the bottom plate (1). A combustion box (3) is fixedly installed on the top of the material box (2). A main exhaust pipe (4) is fixedly installed on the top of the combustion box (3). A recovery mechanism for recovering heat from the combustion box (3) is arranged on the top of the bottom plate (1).

2. The hot blast stove with waste heat recovery function according to claim 1, characterized in that: The recovery mechanism includes a water tank (5), a coiled pipe (6), a drain pipe (7) and a drain valve (8). The water tank (5) is fixedly installed on the top of the bottom plate (1) and is located on the right side of the material box (2). The water tank (5) is filled with clean water. The coiled pipe (6) is fixedly installed on the combustion box (3). The drain pipe (7) is fixedly installed at the outlet end of the coiled pipe (6). One end of the drain pipe (7) far from the coiled pipe (6) extends into the water tank (5). The drain valve (8) is fixedly installed on the drain pipe (7).

3. The hot blast stove with waste heat recovery function according to claim 2, characterized in that: The recovery mechanism further includes a secondary exhaust pipe (9), a first spiral pipe (10), an exhaust gas collection box (11), an air extraction pump (12) and an air extraction pipe (13). The secondary exhaust pipe (9) is fixedly installed on the top of the combustion box (3). The first spiral pipe (10) is fixedly installed at the end of the secondary exhaust pipe (9) far from the combustion box (3) and is located in the water tank (5). The exhaust gas collection box (11) is movably installed on the top of the bottom plate (1) and is located on the right side of the water tank (5). The air extraction pump (12) is fixedly installed on the top of the exhaust gas collection box (11). The air extraction pipe (13) is fixedly installed at the input end of the air extraction pump (12). One end of the air extraction pipe (13) far from the air extraction pump (12) is fixedly connected to the first spiral pipe (10).

4. The hot blast stove with waste heat recovery function according to claim 2, characterized in that: A heat insulation protective layer (14) is fixedly installed on the coiled pipe (6). A water inlet pipe (15) is fixedly installed on the top of the coiled pipe (6). A water inlet valve (16) is fixedly installed on the water inlet pipe (15).

5. The hot blast stove with waste heat recovery function according to claim 2, characterized in that: A blower (17) is fixedly installed on the top of the bottom plate (1) and is located on the right side of the water tank (5). The output end of the blower (17) is fixedly installed with a blowing air pipe (18). The left end of the blowing air pipe (18) extends into the water tank (5) and is fixedly installed with a second spiral pipe (19). An air supply pipe (20) is fixedly installed on the right side of the material box (2). The right end of the air supply pipe (20) is fixedly connected to the second spiral pipe (19).

6. The hot blast stove with waste heat recovery function according to claim 2, characterized in that: A water pump (21) is fixedly installed on the top of the water tank (5). The suction end of the water pump (21) is fixedly installed with a suction pipe (22). One end of the suction pipe (22) far from the water pump (21) extends into the water tank (5) and is located below the liquid level. The discharge end of the water pump (21) is fixedly installed with a water delivery pipe (23).

7. The hot blast stove with waste heat recovery function according to claim 2, characterized in that: A thermometer (24) is fixedly installed on the front side of the water tank (5).

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