Waste heat recycling device of natural gas heating furnace

Abstract

The utility model belongs to the technical field of natural gas heating furnace waste heat utilization, and particularly relates to a natural gas heating furnace waste heat recycling device which comprises a natural gas heating furnace body, a furnace body waste heat recycling assembly is arranged on the outer wall of the natural gas heating furnace body, and a smoke direction adjusting assembly is installed at the top of the natural gas heating furnace body. A heating furnace smoke recycling assembly is arranged at the end of the smoke direction adjusting assembly, and the furnace body waste heat recycling assembly comprises a water inlet pipeline, a water inlet valve, a water flow circulation pipeline, a water pipe outer wall, a heat insulation layer, a heating layer, a water outlet pipeline and a water outlet valve. The end part of the water inlet pipeline is communicated with a water flow circulation pipeline; the waste heat recycling device can recycle heat on the outer wall of the natural gas heating furnace and heat in exhausted smoke at the same time, and the utilization efficiency of waste heat of the natural gas heating furnace can be improved conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat utilization of natural gas heating furnaces, in particular to a waste heat recycling device for natural gas heating furnaces. Background Art

[0002] Natural gas releases a lot of heat after combustion, but currently gas boilers cannot utilize all of this heat, and a large part of the heat is discharged. If we can utilize this part of the heat, we can achieve the goal of energy conservation, emission reduction and cost reduction.

[0003] In Chinese Patent No. 201721570372.3, the utility model relates to a natural gas kiln waste heat recycling furnace, comprising an outer shell, the outer shell and the inner side of the high-temperature refractory layer lining are connected to the grate, the upper side of the grate is connected to the grate, the lower side of the grate is connected to the combustion chamber, the combustion chamber is connected to the fire wall, the combustion chamber is connected to the igniter, the combustion chamber is connected to the gas inlet, the upper side of the grate is connected to the tube sheet connection plate, the tube sheet connection plate is connected to the heat exchange tube, the right side of the heat exchange tube is connected to the cold water inlet, the left side of the heat exchange tube is connected to the hot water outlet, the upper side of the outer shell is connected to the smoke exhaust port, and the bottom of the outer shell is connected to the base; the utility model utilizes heat exchange tubes to realize the recycling function of the waste heat of the natural gas kiln and improve the utilization efficiency of natural gas energy.

[0004] Most of the existing waste heat recycling devices for natural gas heating furnaces arrange heat exchange pipes for recycling waste heat at the chimney outlet to recycle the waste heat at the chimney of the natural gas heating furnace. However, during the operation of the natural gas heating furnace, a lot of heat is discharged from the outer wall of the furnace body. If it is not recycled, the waste heat dissipated from the outer wall of the furnace body will be wasted. In addition, when the hot smoke discharged from the natural gas heating furnace is used to dry other objects, due to the thin pipe opening of the air guide pipe, it is easy to cause the objects to be dried inside the flue gas recycling box to be unevenly heated, and the time required for drying the objects varies.

[0005] Therefore, in order to solve the above problems, a waste heat recycling device for a natural gas heating furnace is proposed. Utility Model Content

[0006] In order to make up for the shortcomings of the existing technology, the present invention solves the problem that most of the existing waste heat recycling devices of natural gas heating furnaces arrange the heat exchange pipes for recycling the waste heat at the chimney outlet, so as to recycle the waste heat at the chimney of the natural gas heating furnace. However, during the operation of the natural gas heating furnace, a lot of heat is discharged from the outer wall of the furnace body. If it is not recycled, the waste heat dissipated from the outer wall of the furnace body will be wasted. In addition, when the hot smoke discharged from the natural gas heating furnace is used to dry other objects, due to the thin pipe opening of the air guide pipe, it is easy to cause the inside of the flue gas recycling box, and the objects to be dried are subjected to uneven hot air, and there are differences in the time required for drying the objects.

[0007] The technical solution adopted by the utility model to solve its technical problems is: the utility model describes a natural gas heating furnace waste heat recycling device, comprising a natural gas heating furnace body, the outer wall of the natural gas heating furnace body is provided with a furnace body waste heat recycling component, and the top of the natural gas heating furnace body is installed with a flue gas redirection component, and the end of the flue gas redirection component is provided with a heating furnace flue gas recycling component, the furnace body waste heat recycling component comprises an inlet pipe, a water inlet valve, a water flow pipe, an outer wall of the water pipe, a temperature insulation layer, a heating layer, a water outlet pipe, and a water outlet valve, the top of the water inlet pipe is installed with a water inlet valve, and the end of the water inlet pipe is connected with a water flow pipe, the outer wall of the water flow pipe is integrally connected with the outer wall of the water pipe, and the outer wall of the outer wall of the water pipe is tightly fitted with the temperature insulation layer, and the side of the water flow pipe is integrally connected with the heating layer, the bottom end of the water flow pipe is connected with a water outlet pipe, and the side of the water outlet pipe is installed with a water outlet valve.

[0008] Preferably, the water inlet pipe forms a connecting structure with the water outlet pipe through the water flow circulation pipe, and the shape of the water flow circulation pipe is set to be semicircular, the material of the heating layer is set to be metal aluminum material, and the inner wall of the heating layer is tightly fitted with the outer wall of the natural gas heating furnace body, and the material of the thermal insulation layer is set to be glass wool material, and the inner wall of the thermal insulation layer is tightly fitted with the outer wall of the water pipe.

[0009] Preferably, the flue gas recycling component of the heating furnace includes a smoke inlet, a smoke separating circular block, a smoke inlet plate, smoke inlet holes, a smoke recycling box, a support rod, a supporting corner block, an object placement plate, an exhaust hole, a rotating shaft, and a sealed door panel. A smoke separating circular block is arranged on the side of the smoke inlet, and the other side of the smoke separating circular block is fixedly connected to the smoke inlet plate, and the inner wall of the smoke inlet plate is provided with smoke inlet holes, the outer wall of the smoke inlet hole is fixedly connected to the smoke recycling box, and the interior of the smoke recycling box is fixedly connected to the support rod, and the bottom wall of the support rod is fixedly connected to the supporting corner block, the outer wall of the smoke recycling box is provided with exhaust holes, and the side of the smoke recycling box is fixedly connected to the rotating shaft, and the outer side of the rotating shaft is rotatably connected to the sealed door panel.

[0010] Preferably, the smoke inlet forms a connecting structure with the inner cavity of the smoke recycling box through the smoke inlet hole, and the inner cavity of the smoke recycling box forms a connecting structure with the outer cavity of the smoke recycling box through the exhaust hole, the shape of the smoke dividing circular block is semicircular, and the horizontal central axis of the smoke dividing circular block coincides with the horizontal central axis of the smoke circulation duct.

[0011] Preferably, the longitudinal section of the supporting corner block is in the shape of a right triangle, and the supporting corner block is fixedly connected to the flue gas recycling box, and the supporting rods are arranged at equal intervals inside the flue gas recycling box.

[0012] Preferably, the flue gas direction adjustment component includes a natural gas heating furnace chimney, a connecting ball, an adjusting knob, an adjusting ball, a first air vent, a second air vent, a smoke exhaust pipe, and a smoke circulation pipe. The top of the natural gas heating furnace chimney is connected to a connecting ball, and the inside of the connecting ball is rotatably connected to the adjusting knob, and the end of the adjusting knob is fixedly connected to the adjusting ball, the inside of the adjusting ball is provided with a first air vent, and the bottom end of the first air vent is connected to the second air vent, one side of the connecting ball is connected to the smoke exhaust pipe, and the other side of the connecting ball is connected to the smoke circulation pipe.

[0013] Preferably, the natural gas heating furnace chimney forms a connecting structure with the smoke exhaust pipe through a connecting ball, and the natural gas heating furnace chimney forms a connecting structure with the smoke circulation pipe through a connecting ball, the first air vent and the second air vent are vertically arranged, the leading adjustment ball forms a rotating structure with the connecting ball through an adjusting knob, and the material of the leading adjustment ball is set to graphene material.

[0014] The utility model is beneficial in that:

[0015] 1. The utility model is provided with a furnace body waste heat recycling component, and a water flow circulation pipe wound around the outer wall of the natural gas heating furnace body is convenient for the water flow to exchange heat with the outer wall of the natural gas heating furnace body when flowing through the water flow circulation pipe, and the waste heat discharged from the outer wall of the natural gas heating furnace body is used to heat the water flow, so as to recycle the waste heat of the natural gas heating furnace body and reduce waste. Moreover, the outside of the water flow circulation pipe is wrapped with a thermal insulation layer, so as to keep the heated water flow inside the water flow circulation pipe warm and reduce its heat loss.

[0016] 2. The utility model is provided with a heating furnace flue gas recycling component, which leads the flue gas generated by the natural gas heating furnace body to the inside of the flue gas recycling box, so that the hot gas can be used to dry the objects to be dried, and the waste heat in the flue gas discharged from the natural gas heating furnace is recycled, so as to reduce the waste of waste heat of the natural gas heating furnace, and a smoke separation round block is provided at the port of the smoke circulation pipeline, so that the smoke transmitted from the smoke circulation pipeline can be dispersed, so that the smoke entering the inside of the flue gas recycling box can be dispersed, so that the objects inside can be heated and the wind speed they are subjected to is relatively uniform, so that objects at different positions can be dried relatively uniformly;

[0017] 3. The utility model is provided with a flue gas direction adjusting component, which can control the flow direction of the smoke discharged from the chimney of the natural gas heating furnace by rotating the direction adjusting ball. When the flue gas recycling box needs to work, the smoke can be guided to the flue gas recycling box. When the flue gas recycling box does not need to work, the smoke can be directly discharged from the smoke exhaust pipe by rotating the direction adjusting ball. The utility model has a simple structure and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model in an overall opened state;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model in an overall closed state;

[0021] Figure 3 It is a three-dimensional structural diagram of the waste heat recycling component of the furnace body of the utility model;

[0022] Figure 4 It is a structural schematic diagram of a partial cross section of a water flow pipeline of the utility model;

[0023] Figure 5 This is a schematic diagram of the explosion structure of the smoke recycling component of the heating furnace of the utility model;

[0024] Figure 6 The figure is a schematic diagram of the explosion structure of the smoke redirecting component of the utility model.

[0025] In the figure: 1. Natural gas heating furnace body; 2. Furnace body waste heat recycling component; 3. Flue gas diversion component; 4. Heating furnace flue gas recycling component; 201. Water inlet pipe; 202. Water inlet valve; 203. Water flow pipe; 204. Water pipe outer wall; 205. Insulation layer; 206. Heating layer; 207. Water outlet pipe; 208. Water outlet valve; 301. Natural gas heating furnace chimney; 302. Connecting ball; 303. Adjustment Knob; 304, leading to the adjustment ball; 305, the first air vent; 306, the second air vent; 307, the smoke exhaust duct; 308, the smoke circulation duct; 401, the smoke inlet; 402, the smoke separation round block; 403, the smoke inlet plate; 404, the smoke inlet hole; 405, the smoke recycling box; 406, the support rod; 407, the supporting corner block; 408, the object placement board; 409, the exhaust hole; 410, the rotating shaft; 411, the sealing door panel. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] See also Figure 1 As shown, a natural gas heating furnace waste heat recycling device includes a natural gas heating furnace body 1, the outer wall of the natural gas heating furnace body 1 is provided with a furnace body waste heat recycling component 2, and the top of the natural gas heating furnace body 1 is installed with a flue gas redirecting component 3, and the end of the flue gas redirecting component 3 is provided with a heating furnace flue gas recycling component 4.

[0029] See also Figure 3 and Figure 4As shown, a waste heat recycling device for a natural gas heating furnace is provided. The furnace body waste heat recycling component 2 is used to heat water by utilizing the waste heat of the outer wall of the furnace body. The water inlet pipe 201 is connected to the water outlet pipe 207 through the water flow pipe 203. The shape of the water flow pipe 203 is set to be semicircular. The material of the heating layer 206 is set to be a metal aluminum material. The inner wall of the heating layer 206 is tightly fitted with the outer wall of the natural gas heating furnace body 1. The material of the insulation layer 205 is set to be a glass wool material. The inner wall of the insulation layer 205 is tightly fitted with the outer wall of the water pipe 207. 4 is a water flow pipe 203 which is tightly fitted and wound around the outer wall of the natural gas heating furnace body 1, so that when the water flows through the water flow pipe 203, it exchanges heat with the outer wall of the natural gas heating furnace body 1, and uses the waste heat discharged from the outer wall of the natural gas heating furnace body 1 to heat the water, so as to recycle the waste heat of the natural gas heating furnace body 1 and reduce waste. The water flow pipe 203 is wrapped with a thermal insulation layer 205 on the outside, so as to keep the heated water in the water flow pipe 203 warm and reduce its heat loss.

[0030] See also Figure 5 As shown, a natural gas heating furnace waste heat recycling device, the heating furnace flue gas recycling component 4 is used to use the hot smoke exhausted from the chimney of the heating furnace to dry objects, the smoke inlet 401 is connected to the inner cavity of the smoke recycling box 405 through the smoke inlet hole 404, and the inner cavity of the smoke recycling box 405 is connected to the outer cavity of the smoke recycling box 405 through the exhaust hole 409, the shape of the smoke dividing circular block 402 is semicircular, and the horizontal center axis of the smoke dividing circular block 402 is coincident with the horizontal center axis of the smoke flow pipe 308, the longitudinal section shape of the support angle block 407 is a right triangle, and the support angle block 407 is fixedly connected to the smoke recycling box 405, and the support rod 40 6 The flue gas recycling box 405 is evenly spaced, and the flue gas generated by the natural gas heating furnace body 1 is led to the inside of the flue gas recycling box 405, so that the hot gas can be used to dry the objects to be dried, and the waste heat in the flue gas discharged from the natural gas heating furnace is recycled, so as to reduce the waste of waste heat of the natural gas heating furnace. A smoke separation round block 402 is provided at the end of the smoke circulation pipe 308, so that the smoke transmitted from the smoke circulation pipe 308 can be dispersed, so that the smoke entering the flue gas recycling box 405 can be dispersed, so that the objects inside can be heated and the wind speed they are subjected to is relatively uniform, so that objects at different positions can be dried relatively uniformly.

[0031] See also Figure 6As shown, a waste heat recycling device for a natural gas heating furnace, the flue gas direction adjustment component 3 is used to control the flow direction of the exhaust smoke, the natural gas heating furnace chimney 301 is connected to the smoke exhaust pipe 307 through a connecting ball 302, and the natural gas heating furnace chimney 301 is connected to the smoke flow pipe 308 through a connecting ball 302, the first air vent 305 and the second air vent 306 are vertically arranged, the direction adjustment ball 304 is connected to the connecting ball 302 through an adjusting knob 303 to form a rotating structure, and the material of the direction adjustment ball 304 is set to graphene material, by rotating the direction adjustment ball 304, it is convenient to control the flow direction of the smoke discharged from the chimney 301 of the natural gas heating furnace, when the smoke recycling box 405 needs to work, the smoke can be guided to the smoke recycling box 405, when the smoke recycling box 405 does not need to work, the smoke can be directly discharged from the smoke exhaust pipe 307 by rotating the direction adjustment ball 304, the structure is simple and the operation is convenient.

[0032] Working principle: During the operation of the natural gas heating furnace body 1, part of the heat generated by combustion in the internal combustion chamber will be dissipated from the outer wall of the furnace body. At this time, the water inlet valve 202 and the water outlet valve 208 are opened, and cold water enters the water flow pipe 203 from the water inlet pipe 201. In the process of flowing downward along the water flow pipe 203 around the outer wall of the natural gas heating furnace body 1, the water will contact the heating layer 206. The heating layer 206 made of metal aluminum has excellent thermal conductivity, which can transfer the waste heat discharged from the outer wall of the natural gas heating furnace body 1 to the water flowing through the water flow pipe 203 to heat the water. In the process of flowing downward, the water continues to exchange heat with the outer wall of the natural gas heating furnace body 1. Finally, the hot water after heating is discharged from the water outlet pipe 207 and can be led to the place where it is needed through the water pipe for use;

[0033] At the same time, the smoke generated by the natural gas heating furnace body 1 during operation will be discharged from the natural gas heating furnace chimney 301. If there is no object that needs to be dried and heated, the adjusting knob 303 is rotated, and the adjusting knob 303 rotates together with the leading adjusting ball 304 at its end, so that the first air vent 305 is aligned with the smoke exhaust pipe 307, and the second air vent 306 is aligned with the natural gas heating furnace chimney 301. At this time, the side of the leading adjusting ball 304 that is blocked just tightly blocks the port of the smoke flow pipe 308. The smoke generated by the natural gas heating furnace body 1 during operation will pass through the second air vent 306 and the first air vent 305 from the natural gas heating furnace chimney 301 in sequence, and finally be discharged from the smoke exhaust pipe 307. Since the outer wall of the leading adjusting ball 304 is tightly fitted with the inner wall of the connecting ball 302, the connecting ball 302 will not rotate without the action of external force.

[0034] If there are objects that need to be dried, the objects are placed on the object placement plate 408, and then the object placement plate 408 is slid from the support rod 406 and pushed into the interior of the smoke recycling box 405. Then the sealing door plate 411 is turned to close, and the adjustment knob 303 is turned at the same time to align the first vent 305 with the natural gas heating furnace chimney 301, and the second vent 306 with the smoke circulation pipe 308. At this time, the smoke inside the natural gas heating furnace chimney 301 will pass through the first vent 305, the second vent 306 in turn. The smoke enters the smoke circulation duct 308 and is guided to the smoke inlet 401 through the smoke circulation duct 308. The smoke discharged from the end of the smoke circulation duct 308 is aligned with the smoke separator block 402. After being blocked by the smoke separator block 402, the smoke will disperse to the surroundings and finally enter the interior of the smoke recycling box 405 through the smoke inlet holes 404. The smoke will then be discharged to the outside through the exhaust holes 409, forming a hot air flow inside the smoke recycling box 405 to dry the objects that need to be dried inside the smoke recycling box 405.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A waste heat recycling device for a natural gas heating furnace, characterized in that: The invention comprises a natural gas heating furnace body (1), wherein the outer wall of the natural gas heating furnace body (1) is provided with a furnace body waste heat recycling component (2), and a flue gas direction adjustment component (3) is installed on the top of the natural gas heating furnace body (1), and a heating furnace flue gas recycling component (4) is provided at the end of the flue gas direction adjustment component (3); The furnace body waste heat recycling component (2) comprises a water inlet pipe (201), a water inlet valve (202), a water flow pipe (203), a water pipe outer wall (204), a thermal insulation layer (205), a heating layer (206), a water outlet pipe (207), and a water outlet valve (208); the top of the water inlet pipe (201) is provided with a water inlet valve (202), and the end of the water inlet pipe (201) is connected with the water flow pipe (203); the outer wall of the water flow pipe (203) is integrally connected with the water pipe outer wall (204), and the outer wall of the water pipe outer wall (204) is tightly fitted with the thermal insulation layer (205); the side of the water flow pipe (203) is integrally connected with the heating layer (206); the bottom of the water flow pipe (203) is connected with the water outlet pipe (207), and the side of the water outlet pipe (207) is provided with a water outlet valve (208).

2. The waste heat recycling device for a natural gas heating furnace according to claim 1 is characterized in that: The water inlet pipe (201) forms a connecting structure with the water outlet pipe (207) through the water flow pipe (203), and the shape of the water flow pipe (203) is set to be semicircular. The material of the heating layer (206) is set to be a metal aluminum material, and the inner wall of the heating layer (206) is tightly fitted with the outer wall of the natural gas heating furnace body (1). The material of the thermal insulation layer (205) is set to be a glass wool material, and the inner wall of the thermal insulation layer (205) is tightly fitted with the outer wall (204) of the water pipe.

3. The waste heat recycling device for a natural gas heating furnace according to claim 1 is characterized in that: The heating furnace flue gas recycling component (4) comprises a smoke inlet (401), a smoke separation round block (402), a smoke inlet plate (403), a smoke inlet hole (404), a smoke recycling box (405), a support rod (406), a support corner block (407), an object placement plate (408), an exhaust hole (409), a rotating shaft (410), and a sealing door plate (411). The side of the smoke inlet (401) is provided with a smoke separation round block (402), and the other side of the smoke separation round block (402) is fixedly connected to the smoke inlet plate (403), and the smoke inlet plate (403) The inner wall of the smoke inlet hole (404) is provided with a smoke inlet hole (404), the outer wall of the smoke inlet hole (404) is fixedly connected to a smoke recycling box (405), the interior of the smoke recycling box (405) is fixedly connected to a support rod (406), and the bottom wall of the support rod (406) is fixedly connected to a support corner block (407), the outer wall of the smoke recycling box (405) is provided with an exhaust hole (409), and the side of the smoke recycling box (405) is fixedly connected to a rotating shaft (410), and the outside of the rotating shaft (410) is rotatably connected to a sealing door panel (411).

4. The waste heat recycling device for a natural gas heating furnace according to claim 3 is characterized in that: The smoke inlet (401) forms a communication structure with the inner cavity of the smoke recycling box (405) through the smoke inlet hole (404), and the inner cavity of the smoke recycling box (405) forms a communication structure with the outer cavity of the smoke recycling box (405) through the exhaust hole (409). The shape of the smoke separating circular block (402) is semicircular, and the horizontal center axis of the smoke separating circular block (402) and the horizontal center axis of the smoke circulation duct (308) are arranged to coincide.

5. The waste heat recycling device for a natural gas heating furnace according to claim 3 is characterized in that: The longitudinal section of the support angle block (407) is in the shape of a right triangle, and the support angle block (407) is fixedly connected to the flue gas recycling box (405), and the support rods (406) are arranged at equal intervals inside the flue gas recycling box (405).

6. The waste heat recycling device for a natural gas heating furnace according to claim 1 is characterized in that: The smoke direction adjustment component (3) comprises a natural gas heating furnace chimney (301), a connecting ball (302), an adjusting knob (303), a direction adjusting ball (304), a first vent (305), a second vent (306), a smoke exhaust pipe (307), and a smoke circulation pipe (308). The top of the natural gas heating furnace chimney (301) is connected to the connecting ball (302), and the connecting ball (302) is rotatably connected to the inside of the connecting ball (302), and the end of the adjusting knob (303) is fixedly connected to the direction adjusting ball (304), the inside of the direction adjusting ball (304) is provided with a first vent (305), and the bottom end of the first vent (305) is connected to the second vent (306), one side of the connecting ball (302) is connected to the smoke exhaust pipe (307), and the other side of the connecting ball (302) is connected to the smoke circulation pipe (308).

7. The waste heat recycling device for a natural gas heating furnace according to claim 6, characterized in that: The natural gas heating furnace chimney (301) forms a connecting structure with the smoke exhaust pipe (307) through the connecting ball (302), and the natural gas heating furnace chimney (301) forms a connecting structure with the smoke circulation pipe (308) through the connecting ball (302), the first air vent (305) and the second air vent (306) are vertically arranged, the leading adjustment ball (304) forms a rotating structure with the connecting ball (302) through the adjusting knob (303), and the material of the leading adjustment ball (304) is set to be graphene material.

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