Waste heat recovery hot water stove

Abstract

The utility model discloses a waste heat recovery hot water stove which comprises a stove body (2) and a hearth (3) arranged in the stove body, and is characterized in that a closed water storage space (6) is formed between the outer wall of the stove body and the inner wall of the stove body (3-2), a stove flue (5) is arranged in the middle of the hearth and is communicated with the outside, smoke holes (3-1) are arranged on the periphery above the hearth, and the hearth is communicated with a smoke chamber (7) below the hearth through smoke pipes (4) on the smoke holes. The smoke chamber is located at the bottom of the boiler body, a smoke outlet (7-1) is formed in the smoke chamber, a smoke ventilator (13) is arranged on the smoke outlet, a blast nozzle (2-2) is formed in the outer wall of the boiler body and communicated with the hearth through a blast pipe, an air blower (11) is arranged at the blast nozzle, and a water outlet and a water inlet are formed in the upper portion and the lower portion of the outer wall of the boiler body respectively. A furnace bridge is fixed below the hearth, an ash chamber (8) is arranged at the bottom of the hearth, and a drawer-shaped ash hopper (20) is arranged in the ash chamber. The smoke chamber is a flat rectangular body, the furnace body is located on one side above the smoke chamber, and the smoke outlet is located on the other side above the smoke chamber.

Description

Technical Field

[0001] The technical solution relates to a stove, in particular to a waste heat recovery hot water stove. Background Art

[0002] As we all know, a stove is a device for making fire and cooking. A traditional stove cooks rice and dishes in the pot by burning and heating. During the combustion of fuel, part of the heat energy is used to work on the pot body, and the remaining large amount of heat energy is dissipated through the stove body or exhaust gas, resulting in waste. In order to improve thermal efficiency, existing technicians have invented stoves that recycle waste heat from exhaust gas. For example, Chinese patent 202320044873.7 discloses an energy-saving coal stove for heating in rural areas in the north. A heat exchange chamber (flue and smoke chamber) is arranged next to the furnace of the stove. The high-temperature exhaust gas is used to heat water through heat exchange tubes, thereby realizing waste heat recovery and utilization, and achieving the technical effect of energy saving and environmental protection. However, it is found in practice that the scheme has the following shortcomings: 1. It is difficult to clean smoke and ashes: the exhaust smoke after combustion contains a large amount of solid particles. These smoke and ashes will accumulate in the flue and smoke chamber, which will not only cause blockage and poor smoke exhaust, but also adhere to the heat exchange tubes and affect the heat exchange efficiency; 2. Insufficient air circulation: Fuel combustion requires sufficient oxygen. Insufficient air circulation will lead to incomplete combustion, reduce combustion efficiency and produce harmful gases. Insufficient circulation will also increase smoke precipitation, accelerate the corrosion of the inner wall of the flue, cause damage to the flue, and reduce the service life of the equipment. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a waste heat recovery hot water stove that recovers and utilizes tail gas to heat water. It also has the characteristics of convenient smoke and ash cleaning and high thermal efficiency, thereby avoiding smoke duct blockage, reducing the generation of harmful gases, and extending the life of the equipment. The specific scheme is as follows.

[0004] The waste heat recovery hot water stove comprises a furnace body, which comprises a furnace chamber. The furnace body is characterized in that a closed water storage space is formed between the outer wall of the furnace body and the inner wall of the furnace, a furnace channel is opened in the middle of the furnace chamber and is connected to the outside, smoke holes are opened around the upper part of the furnace chamber and are connected to the smoke chamber below through smoke pipes on the smoke holes, the smoke chamber is located at the bottom of the furnace body, a smoke outlet is opened on the smoke chamber and a smoke exhaust fan is arranged on the smoke outlet, an air blast port is opened on the outer wall of the furnace body and is connected to the furnace chamber through an air blast pipe, a blower is arranged at the air blast port, and a water outlet and a water inlet are respectively arranged on the upper and lower parts of the outer wall of the furnace body.

[0005] A furnace bridge is fixed under the furnace, and an ash chamber is arranged at the bottom of the furnace. A drawer-shaped ash hopper is arranged in the ash chamber.

[0006] The smoke chamber is a flat rectangular body, the furnace body is located on one side above the smoke chamber, and the smoke outlet is located on the other side above the smoke chamber. A detachable sealing plate is provided at the bottom of the smoke chamber.

[0007] The smoke outlet is connected to the smoke exhaust machine through a smoke exhaust pipe.

[0008] A temperature sensor is arranged above the furnace body.

[0009] A stove body (stove shell) is arranged outside the stove body, and the stove body wraps the stove body, the smoke chamber, the smoke exhaust fan and the blower.

[0010] The front plate of the stove body is provided with a furnace opening which matches the furnace, and the furnace opening is provided with a stove door which is locked by a lock.

[0011] The front plate of the stove body is provided with an ash hopper opening for matching with the ash hopper.

[0012] The front plate of the stove body is provided with a control panel, and control switches of the smoke exhaust fan and the blower are arranged on the control panel through wires.

[0013] A ventilation hole is provided on one side of the stove body close to the smoke exhaust fan and the blower.

[0014] The water outlet is connected to a water outlet pipe, the other end of which is arranged on the back plate of the stove body and has a water outlet joint. The water inlet is connected to the back plate of the stove body through a water inlet pipe and has a water inlet joint.

[0015] The water inlet pipe is composed of water inlet pipe I and water inlet pipe II. The smoke exhaust pipe is provided with a water storage interlayer. Water pipe I connects the water inlet joint and the upper part of the water storage interlayer, and water pipe II connects the water inlet and the lower part of the water storage interlayer.

[0016] The smoke exhaust port of the smoke exhaust machine is arranged on the back plate of the stove body.

[0017] Compared with the prior art, this technical solution achieves the following technical effects:

[0018] 1. In this solution, the blower can deliver air to the furnace to ensure that there is sufficient oxygen in the furnace to fully burn the fuel, thereby improving the combustion efficiency and reducing the generation of harmful gases. The blower blowing and the smoke exhauster exhausting can enhance the gas flow, clean the furnace and smoke pipe, reduce the adhesion of smoke and dust, reduce the corrosion of smoke and dust to the equipment, and extend the service life of the equipment;

[0019] 2. In this scheme, the ash produced after the fuel in the furnace is burned falls into the ash hopper, and the staff can remove the ash hopper to clean it;

[0020] 3. In this solution, the ash in the smoke pipe will usually settle in the smoke chamber. Since a detachable sealing plate is provided at the bottom of the smoke chamber, the smoke chamber can be cleaned by removing the sealing plate. The advantages of setting the smoke chamber at the bottom also include: (1) Because the residual smoke in the smoke pipe flows from top to bottom, under the combined effects of gravity, blast port, smoke exhaust pipe, and inertia, the particles in the residual smoke can easily collide and settle at the bottom of the smoke chamber, which is conducive to the collection of ash particles; (2) The sealing plate is provided at the bottom of the smoke chamber, and the sealing plate can be removed to clean the ash without removing the outer shell of the stove body. Therefore, the problem of difficulty in cleaning smoke and ash in the prior art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of Example 1 of the utility model Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of Example 1 of the utility model Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the positional relationship between the furnace body and the smoke exhauster of Example 1 of the utility model. Figure 1 ;

[0024] Figure 4 This is a schematic diagram of the positional relationship between the furnace body and the smoke exhauster of Example 1 of the utility model. Figure 2 ;

[0025] Figure 5 It is a schematic structural diagram of the positional relationship between the furnace body and the smoke chamber of Example 1 of the utility model;

[0026] Figure 6 It is a schematic diagram of the diagonal cross-sectional structure of the furnace body of Example 1 of the utility model.

[0027] Explanation of the accompanying drawings: 1 stove body, 2 furnace body, 2-1 water outlet, 2-2 blast outlet, 2-3 water inlet, 3 furnace, 3-1 smoke hole, 3-2 furnace inner wall, 4 smoke pipe, 5 furnace channel, 6 water storage space, 7 smoke chamber, 7-1 smoke outlet, 8 ash chamber, 9 water inlet pipe, 9-1 water pipe I, 9-2 water pipe II, 10 smoke exhaust pipe, 11 blower, 12 temperature sensor, 13 smoke exhaust fan, 13-1 smoke exhaust outlet, 14 water outlet pipe, 15 water outlet joint, 16 water inlet joint, 17 furnace bridge, 18 stove door, 19 lock, 20 ash hopper, 21 through hole, 22 control panel. DETAILED DESCRIPTION

[0028] Example 1, see attached Figure 1-6The waste heat recovery hot water stove comprises a furnace body 2, which comprises a furnace chamber 3, wherein a closed water storage space 6 is formed between the outer wall of the furnace body and the inner wall 3-2 of the furnace, a furnace channel 5 is provided in the middle of the furnace chamber and is connected to the outside, smoke holes 3-1 are provided around the upper part of the furnace chamber and are connected to the smoke chamber 7 below through smoke pipes 4 on the smoke holes, the smoke chamber is located at the bottom of the furnace body, a smoke outlet 7-1 is provided on the smoke chamber and a smoke exhaust fan 13 is provided on the smoke outlet, an air blast port 2-2 is provided on the outer wall of the furnace body and is connected to the furnace chamber through an air blast pipe, a blower 11 is provided at the air blast port, and a water outlet 2-1 and a water inlet 2-3 are provided at the upper and lower parts of the outer wall of the furnace body, respectively.

[0029] A furnace bridge 17 is fixed under the furnace, and an ash chamber 8 is provided at the bottom of the furnace. A drawer-shaped ash hopper 20 is provided in the ash chamber. When natural gas is burned, the gas stove can be directly placed in the furnace. When solid fuels such as coal, wood, briquettes, compressed particles, etc. are burned, they are placed on the furnace bridge, and the ash after burning will fall into the ash hopper.

[0030] The smoke chamber is a flat rectangular body, the furnace body is located on one side above the smoke chamber, and the smoke outlet is located on the other side above the smoke chamber, so as to facilitate the space layout and installation of the smoke exhauster. A detachable sealing plate is provided at the bottom of the smoke chamber, and the sealing plate is screwed to seal the bottom of the smoke chamber. After removing the sealing plate, the smoke chamber can be cleaned.

[0031] The smoke outlet is connected to the smoke exhaust machine via a smoke exhaust pipe 10 .

[0032] A temperature sensor 12 is provided above the furnace body.

[0033] The stove body (stove shell) is provided outside the stove body, and the stove body 1 wraps the stove body, smoke chamber, smoke exhaust fan and blower. The stove body and the stove body can be fixed by screws, or they can be integrally formed. The stove body and the stove body can have a common panel, such as the left panel of the stove body can be the left panel of the stove body, and the front and rear panels of the stove body can also be part of the front and rear panels of the stove body. The stove body can not only protect the internal structure, but also have an aesthetic effect.

[0034] The front plate of the stove body is provided with a furnace opening for matching the furnace, and the furnace opening is provided with a stove door 18, which is locked by a lock 19. A technician can add fuel or observe the situation in the furnace through the furnace.

[0035] The front plate of the stove body is provided with an ash hopper opening for matching with the ash hopper.

[0036] The front panel of the stove body is provided with a control panel 22, and the control switches of the smoke exhaust fan and the blower are arranged on the control panel through wires.

[0037] The stove body is provided with ventilation holes 21 near the smoke exhaust fan and the blower. The ventilation holes can not only play the role of heat dissipation of the blower, the exhaust fan and the control panel, but also facilitate the blower to absorb air.

[0038] The water outlet is connected with a water outlet pipe, the other end of which is arranged on the back plate of the stove body and has a water outlet joint 15. The water inlet is connected to the back plate of the stove body through a water inlet pipe 9 and has a water inlet joint 16.

[0039] The water inlet pipe 9 is composed of water inlet pipe I 9-1 and water inlet pipe II 9-2. The smoke exhaust pipe is provided with a water storage interlayer. Water pipe I connects the water inlet joint and the upper part of the water storage interlayer, and water pipe II connects the water inlet and the lower part of the water storage interlayer.

[0040] The smoke exhaust port of the smoke exhaust machine is arranged on the back plate of the stove body.

[0041] The working principle of this embodiment is as follows:

[0042] Connect the water inlet to the tap water source and fill the water storage space with cold water. Connect the water outlet to water-using equipment or water storage equipment (such as hot water floor heating or thermal insulation water tank, etc.);

[0043] Fuel is injected through the furnace channel and burned in the furnace. On the one hand, it heats the pot to cook the food, and the high-temperature residual smoke generated enters the smoke pipe through the smoke hole. Since the smoke pipe is located in the water storage space, the high-temperature residual smoke will exchange heat with the cold water in the water storage space, heating the cold water into hot water. After the hot water temperature reaches the specified temperature (usually 40-50°), it is output through the water outlet. The residual smoke after consuming the heat enters the bottom smoke chamber and settles, and is discharged through the smoke outlet, smoke exhaust pipe, smoke exhaust fan, and smoke exhaust outlet in turn.

[0044] Further explanation of the technical effect of this technical solution:

[0045] In this solution, the blower can deliver air to the furnace to ensure that there is sufficient oxygen in the furnace to fully burn the fuel, thereby improving the combustion efficiency and reducing the generation of harmful gases. The blower blowing and the smoke exhauster exhausting can enhance the gas flow, clean the furnace and smoke pipe, reduce the adhesion of smoke and dust, reduce the corrosion of smoke and dust to the equipment, and extend the service life of the equipment;

[0046] In this solution, the ash produced after the fuel in the furnace is burned falls into the ash hopper, and the staff can clean the ash by pulling out the ash hopper. The ash in the smoke pipe will usually settle in the smoke chamber. Since a removable sealing plate is provided at the bottom of the smoke chamber, the smoke chamber can be cleaned by removing the sealing plate. The benefits of setting the smoke chamber at the bottom also include: (1) Because the residual smoke in the smoke pipe moves from top to bottom, under the combined effects of gravity, air blast, smoke exhaust pipe, and inertia, the particles in the residual smoke can easily collide and settle to the bottom of the smoke chamber, which is conducive to the collection of ash particles; (2) The sealing plate is provided at the bottom of the smoke chamber, and the sealing plate can be removed to clean the ash without removing the outer shell of the stove body. Therefore, the problem of difficulty in cleaning smoke and ash in the prior art is solved;

[0047] The water in the furnace is heated to a state where the temperature gradually rises from bottom to top. Since cold water has a greater density than hot water, the state of the furnace being hot at the top and cold at the bottom will tend to be stable. This solution sets the water inlet at the bottom of the furnace and the water outlet at the top of the furnace, which is opposite to the flow direction of the smoke pipe and the same as the direction of temperature rise. New cold water is continuously injected at the bottom and heated hot water is continuously released at the top. The temperature difference in the furnace will tend to be stable, the water flow in the stove is directional and orderly, and the temperature of the released hot water will be more stable.

[0048] The advantage of having a water storage interlayer in the smoke exhaust pipe is that cold water enters the water storage interlayer through the water inlet joint and the water inlet pipe I. Since the residual smoke in the smoke exhaust pipe has residual heat, heat exchange occurs in the water storage interlayer, the cold water is heated, and the residual smoke dissipates heat. The heated water then enters the water inlet (that is, the water storage space) through the water inlet pipe II, which can further improve the thermal efficiency and reduce the impact of the residual smoke on the environment.

[0049] In addition to setting the switches of the smoke exhaust pipe and blower, the control panel of this device can also be provided with a display panel to display the readings of the temperature sensor. Solenoid valves can also be set at the water outlet and the water inlet to read the water temperature through the temperature sensor. When the temperature reaches the specified temperature, the valve will automatically open to release water. If the temperature does not reach the specified temperature, the valve will be closed to boil water. The specific details will be determined by the technical staff according to the actual situation.

Claims

1. A waste heat recovery hot water stove, comprising a furnace body (2), wherein the furnace body comprises a furnace chamber (3), wherein: A closed water storage space (6) is formed between the outer wall of the furnace body and the inner wall (3-2) of the furnace. A furnace channel (5) is provided in the middle of the furnace and is connected to the outside. Smoke holes (3-1) are provided around the upper part of the furnace and are connected to a smoke chamber (7) below through a smoke pipe (4) on the smoke hole. The smoke chamber is located at the bottom of the furnace body. A smoke outlet (7-1) is provided on the smoke chamber and a smoke exhaust fan (13) is provided on the smoke outlet. An air blast port (2-2) is provided on the outer wall of the furnace body and is connected to the furnace through an air blast pipe. A blower (11) is provided at the air blast port. A water outlet (2-1) and a water inlet (2-3) are also provided on the outer wall of the furnace body.

2. The waste heat recovery hot water stove according to claim 1, characterized in that: A furnace bridge (17) is fixed below the furnace, an ash chamber (8) is provided at the bottom of the furnace, and a drawer-shaped ash hopper (20) is provided in the ash chamber.

3. The waste heat recovery hot water stove according to claim 1, characterized in that: The smoke chamber is rectangular, the furnace body is located on one side above the smoke chamber, the smoke outlet is located on the other side above the smoke chamber, and a detachable sealing plate is provided at the bottom of the smoke chamber.

4. The waste heat recovery hot water stove according to claim 1, characterized in that: The smoke outlet is connected to the smoke exhaust machine via a smoke exhaust pipe (10).

5. The waste heat recovery hot water stove according to claim 1, characterized in that: A stove body is arranged outside the furnace body, and the stove body (1) wraps the furnace body, smoke chamber, smoke exhaust fan and blower. The stove body is provided with air holes (21) near the smoke exhaust fan and the blower.

6. The waste heat recovery hot water stove according to claim 5, characterized in that: The stove body front plate is provided with a furnace opening matching the furnace, and the furnace opening is provided with a stove door (18) which is locked by a lock buckle (19).

7. The waste heat recovery hot water stove according to claim 2, characterized in that: A stove body is arranged outside the furnace body, and the stove body (1) wraps the furnace body, smoke chamber, smoke exhaust fan and blower. An ash hopper opening for matching with the ash hopper is reserved on the front plate of the stove body.

8. The waste heat recovery hot water stove according to claim 5, characterized in that: The front panel of the stove body is provided with a control panel (22), and control switches of the smoke exhaust fan and the blower are arranged on the control panel through wires.

9. The waste heat recovery hot water stove according to claim 5, characterized in that: The water outlet is connected to a water outlet pipe, the other end of which is arranged on the back plate of the stove body and has a water outlet joint (15). The water inlet is connected to the back plate of the stove body through a water inlet pipe (9) and has a water inlet joint (16).

10. The waste heat recovery hot water stove according to claim 9, characterized in that: The water inlet pipe (9) is composed of a water inlet pipe I (9-1) and a water inlet pipe II (9-2). The smoke outlet is connected to the smoke exhaust machine via a smoke exhaust pipe (10). The smoke exhaust pipe is provided with a water storage interlayer. The water pipe I is connected to the water inlet joint and the upper part of the water storage interlayer, and the water pipe II is connected to the water inlet and the lower part of the water storage interlayer.

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