Flue gas waste heat recycling mechanism for drying curing oven

Abstract

The flue gas waste heat recycling mechanism comprises a furnace body, one side of the top face of the furnace body is fixedly connected and communicated with a smoke exhaust port, and one side of the bottom face of the furnace body is fixedly connected and communicated with a heat return port. A heat pump system is formed through the arranged waste heat recovery component, cyclic utilization of flue gas heat energy is achieved, the heat energy utilization rate is high, the waste heat recovery component is additionally provided with a moisture separation assembly, flue gas discharged by the curing oven can be treated, during treatment, flue gas with high moisture content forms a spiral cyclone flow channel through a spiral baffle plate, and the heat energy utilization rate is high. Under the influence of gravity, moisture which is greatly influenced by the gravity can be settled and separated, so that the moisture content in hot air exhausted from the exhaust port is greatly reduced, the hot air is recycled into the curing oven through the heat pump system to realize heat source recycling, and due to the low moisture content, the lower humidity is kept; therefore, the phenomenon that the humidity is increased too much due to heat regeneration in the curing oven is avoided, and the drying and curing efficiency is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of curing furnace equipment, in particular to a fume waste heat circulation recovery mechanism for a drying and curing furnace. Background Art

[0002] Curing refers to the production process of heating parts, curing resin and drying in the electronics industry and other industries in order to enhance the stress of material bonding. The equipment for implementing this curing process is a drying curing furnace. After the curing is completed, the smoke in the current curing furnace is led out by the fan and discharged from the exhaust port, or the furnace is directly opened for discharge, so the heat energy of the smoke is directly wasted; in this regard, the Chinese utility model patent with the authorization announcement number CN208653224U discloses a waste heat utilization mechanism for a curing furnace used in SMT production, which includes a rectangular furnace body, one side of the furnace body in the length direction A movable door slot is provided in the middle, a partition door is movably installed in the movable door slot, a partition door guide rail is provided above the movable door slot, and a slider is movably installed on the partition door guide rail; the inner cavity of the furnace body is divided into a preheating chamber and a curing chamber by a partition door, and preheating pipes are fixed on the side walls of the furnace body on both sides of the preheating chamber, and hot air outlets are distributed on the preheating pipes. The top of the preheating pipe is connected to the heat supply branch pipe, and the bottom of the preheating pipe is connected to the return heat branch pipe. A return heat port is provided on the side wall of the furnace body at the lower part of the curing chamber, and the return heat port is connected to the return heat main pipe; it uses a circulating heat recovery method to connect the exhausted hot air back to the furnace through the return heat branch pipe to improve the thermal energy utilization rate, but it still has the following defects:

[0003] The hot air generated by the curing furnace during curing contains a lot of moisture. If this hot air is directly returned for use, the humidity in the curing furnace will further increase, which is not conducive to the drying and curing process and will prolong the drying time.

[0004] To this end, we propose a flue gas waste heat recycling recovery mechanism for a drying and curing furnace to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a fume waste heat recycling mechanism for a drying and curing furnace to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flue gas waste heat circulation recovery mechanism for a drying and curing furnace, comprising a furnace body, one side of the furnace body top surface is fixedly connected to and connected to a smoke exhaust port, one side of the furnace body bottom surface is fixedly connected to and connected to a heat recovery port, and waste heat recovery components are arranged on the smoke exhaust port and the heat recovery port;

[0007] The waste heat recovery components include an induced draft fan, a moisture separation component, a heat pump unit, and a heat exchange chamber;

[0008] The moisture separation component includes a warehouse body and a water tank, the water tank is located below the warehouse body, a top cover is provided on the top surface of the warehouse body, the bottom surface of the warehouse body is fixedly connected to and connected to the conical bottom shell, the two sides of the top surface of the warehouse body are horizontally fixed with an air inlet and an exhaust port, the exhaust port is connected to the interior of the warehouse body, the air inlet is located inside the warehouse body and one end is fixedly connected to a bent pipe, the bottom surface of the top cover is vertically fixed to a hollow vertical pipe, the hollow vertical pipe is located inside the warehouse body and is fixedly sleeved on a spiral baffle, and the bottom end of the bent pipe is located above the spiral baffle.

[0009] Preferably, the induced draft fan is fixedly connected to the side wall of the furnace body, one end of the induced draft fan is fixedly connected to and connected to the first smoke pipe, the other end of the induced draft fan is fixedly connected to the second smoke pipe, the free end of the first smoke pipe is fixedly connected to and connected to the cover body, the cover body is fixedly connected to and connected to the smoke exhaust port, and the free end of the second smoke pipe is fixedly connected to and connected to the end of the air inlet.

[0010] Preferably, the heat pump unit is fixedly connected to the exhaust port and communicated with an air pipe, the heat pump unit is fixedly connected to the heat exchange chamber and communicated with a refrigerant medium pipe, and the heat exchange chamber and the heat recovery port are fixedly connected to the heat recovery pipe.

[0011] Preferably, the side wall of the bin body is fixedly embedded with a plate-shaped shell, the plate-shaped shell is located on one side inside the bin body and is fixedly connected to a sensing plate, a through groove is provided on the plate-shaped shell, a slider is vertically slidably connected in the through groove, and a non-contact liquid level sensor is fixedly connected to one side of the slider close to the sensing plate.

[0012] Preferably, the through groove is vertically rotatably connected to the screw rod, the slider is fixedly connected to the threaded sleeve, the screw rod is threadedly connected to the threaded sleeve, a bottom cavity is opened inside the bottom surface of the plate-shaped shell, the bottom end of the screw rod is located in the bottom cavity and fixedly connected to the driven bevel gear, one side of the bottom cavity is rotatably connected to the active bevel gear, the active bevel gear is meshed and connected to the driven bevel gear, the rotating shaft end of the active bevel gear is horizontally fixedly connected to the damping shaft rod, the side of the bottom of the plate-shaped shell away from the warehouse body is rotatably connected to the knob, the knob is fixedly connected to the end of the damping shaft rod, and the damping shaft rod is rotatably sleeved in the plate-shaped shell.

[0013] Preferably, the bottom surface of the conical bottom shell is fixedly connected to and connected to a drain pipe, the bottom end of the drain pipe is fixedly connected to and connected to a drain pump, the drain pump is fixedly connected to and connected to the top surface of the water tank, a plurality of supporting legs are fixedly connected to the periphery of the warehouse body, a pressure relief port is vertically fixedly connected to the center of the top surface of the top cover, the pressure relief port is connected to the inside of the hollow vertical pipe, the top end of the pressure relief port is fixedly connected to and connected to a protective valve, an upper flange is fixedly connected to the periphery of the bottom surface of the top cover, a lower flange is fixedly connected to the periphery of the top surface of the warehouse body, a plurality of bolts are vertically inserted into the upper flange and the lower flange, and the bottom ends of the bolts are threadedly connected to hexagonal nuts.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model forms a heat pump system through the waste heat recovery component, realizes the recycling of flue gas thermal energy, and has a high thermal energy utilization rate. The waste heat recovery component is additionally provided with a moisture separation component, which can process the flue gas discharged from the curing furnace. During the processing, the flue gas with a relatively high water content forms a spiral cyclone flow channel through the spiral baffle, and under the influence of gravity, the moisture that is greatly affected by gravity will settle and separate, so that the moisture content in the hot air discharged from the exhaust port is greatly reduced, and the hot air is recycled into the curing furnace through the heat pump system to realize the reuse of the heat source, and due to the low moisture content, a relatively low humidity is maintained, so that the humidity in the curing furnace will not increase excessively due to heat recovery, and the efficiency of drying and curing will not be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure in the first and second embodiments of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the moisture separation component in the first and second embodiments of the utility model;

[0018] Figure 3 It is a schematic diagram of the cutaway structure of the moisture separation component in the first and second embodiments of the utility model;

[0019] Figure 4 This is a structural schematic diagram of a non-contact liquid level sensor in the second embodiment of the present utility model.

[0020] In the figure: 1, furnace body; 2, waste heat recovery component; 11, smoke exhaust port; 12, heat recovery port; 21, induced draft fan; 22, moisture separation component; 23, heat pump unit; 24, heat exchange chamber; 25, first smoke pipe; 26, cover body; 27, second smoke pipe; 28, air pipe; 29, refrigerant medium pipe; 210, heat recovery pipe; 221, chamber body; 222, water tank; 223, top cover; 224, air inlet; 225, exhaust port; 226, hollow vertical pipe; 227, spiral baffle; 228, elbow; 229, pressure relief port; 2210, protection valve ; 2211, upper flange; 2212, lower flange; 2213, bolt; 2214, hexagonal nut; 2215, conical bottom shell; 2216, drain pipe; 2217, drain pump; 2218, support leg; 2219, plate shell; 2220, through groove; 2221, induction plate; 2222, slider; 2223, non-contact liquid level sensor; 2224, screw; 2225, threaded sleeve; 2226, bottom cavity; 2227, driven bevel gear; 2228, driving bevel gear; 2229, damping shaft; 2230, knob. DETAILED DESCRIPTION

[0021] 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.

[0022] Embodiment 1:

[0023] See also Figure 1-3 The utility model provides a technical solution: a flue gas waste heat recycling and recovery mechanism for a drying and curing furnace, comprising a furnace body 1, one side of the top surface of the furnace body 1 is fixedly connected to and connected with a smoke exhaust port 11, one side of the bottom surface of the furnace body 1 is fixedly connected to and connected with a heat recovery port 12, and a waste heat recovery component 2 is arranged on the smoke exhaust port 11 and the heat recovery port 12;

[0024] The waste heat recovery component 2 includes an induced draft fan 21, a moisture separation component 22, a heat pump unit 23, and a heat exchange chamber 24;

[0025] The moisture separation component 22 includes a silo 221 and a water tank 222. The water tank 222 is located below the silo 221. A top cover 223 is provided on the top surface of the silo 221. The bottom surface of the silo 221 is fixedly connected to and communicated with a conical bottom shell 2215. The two sides of the top surface of the silo 221 are horizontally fixedly connected with an air inlet 224 and an exhaust port 225. The exhaust port 225 is connected to the interior of the silo 221. The air inlet 224 is located inside the silo 221 and one end is fixedly connected to a bend 228. The bottom surface of the top cover 223 is vertically fixedly connected to a hollow vertical pipe 226. The hollow vertical pipe 226 is located inside the silo 221 and is fixedly sleeved with a spiral baffle 227. The bottom of the bend 228 The end is located above the spiral baffle 227, and the smoke discharged from the curing furnace is treated by the moisture separation component 22. During the treatment, the smoke with a higher water content passes through the spiral baffle 227 to form a spiral cyclone flow channel. Under the influence of gravity, the moisture that is greatly affected by gravity will settle and separate, so that the moisture content in the hot air discharged from the exhaust port 225 is greatly reduced. The hot air is recycled into the curing furnace through the heat pump system to realize the reuse of heat source, and due to the low moisture content, a low humidity is maintained, so that the humidity in the curing furnace will not increase excessively due to heat recovery, and the efficiency of drying and curing will not be affected.

[0026] Embodiment 2:

[0027] See also Figure 1-4, which is the second embodiment of the utility model. This embodiment is based on the previous embodiment. The induced draft fan 21 is fixedly connected to the side wall of the furnace body 1, one end of the induced draft fan 21 is fixedly connected to and connected to the first smoke pipe 25, the other end of the induced draft fan 21 is fixedly connected to the second smoke pipe 27, the free end of the first smoke pipe 25 is fixedly connected to and connected to the cover body 26, the cover body 26 is fixedly connected to and connected to the smoke exhaust port 11, and the free end of the second smoke pipe 27 is fixedly connected to and connected to the end of the air inlet 224.

[0028] The heat pump unit 23 and the exhaust port 225 are fixedly connected and connected to the air pipe 28, the heat pump unit 23 and the heat exchange chamber 24 are fixedly connected and connected to the refrigerant medium pipe 29, and the heat exchange chamber 24 and the heat recovery port 12 are fixedly connected and connected to the heat recovery pipe 210, forming a heat pump system to recycle heat energy.

[0029] The side wall of the bin body 221 is fixedly embedded with a plate-shaped shell 2219, which is located on one side of the interior of the bin body 221 and is fixedly connected to a sensing plate 2221. A through groove 2220 is provided on the plate-shaped shell 2219, and a slider 2222 is vertically slidably connected in the through groove 2220. A non-contact liquid level sensor 2223 is fixedly connected to one side of the slider 2222 close to the sensing plate 2221. The non-contact liquid level sensor 2223 is directly used to control the drain pump 2217. When the water level reaches the position of the non-contact liquid level sensor 2223, the accumulated water is discharged to avoid excessive accumulation of water.

[0030] The through slot 2220 is vertically rotated to connect the screw rod 2224, the slider 2222 is fixedly connected to the threaded sleeve 2225, the screw rod 2224 is threadedly connected to the threaded sleeve 2225, a bottom cavity 2226 is provided inside the bottom surface of the plate shell 2219, the bottom end of the screw rod 2224 is located in the bottom cavity 2226 and is fixedly connected to the driven bevel gear 2227, one side of the bottom cavity 2226 is rotatably connected to the active bevel gear 2228, and the active bevel gear 2228 is meshedly connected to the driven bevel gear 222 7. The rotating shaft end of the active bevel gear 2228 is horizontally fixedly connected to the damping shaft rod 2229. The bottom of the plate shell 2219 is rotatably connected to the side of the bin body 221 through the knob 2230. The knob 2230 is fixedly connected to the end of the damping shaft rod 2229. The damping shaft rod 2229 is rotatably sleeved in the plate shell 2219. The height of the non-contact liquid level sensor 2223 is changed by rotating the knob 2230, thereby adjusting the amount of water accumulated in the bin body 221 in a disguised manner, which is convenient for use.

[0031] The bottom surface of the conical bottom shell 2215 is fixedly connected to and connected with the drain pipe 2216, the bottom end of the drain pipe 2216 is fixedly connected to and connected with the drain pump 2217, the drain pump 2217 is fixedly connected to and connected with the top surface of the water tank 222, a plurality of supporting legs 2218 are fixedly connected to the periphery of the warehouse body 221, the center of the top surface of the top cover 223 is vertically fixedly connected to the pressure relief port 229, the pressure relief port 229 is connected to the inside of the hollow vertical pipe 226, the top end of the pressure relief port 229 is fixedly connected to and connected with the protection valve 2210, the bottom surface of the top cover 223 is fixedly connected to the upper flange 2211, the top surface of the warehouse body 221 is fixedly connected to the lower flange 2212, a plurality of bolts 2213 are vertically inserted on the upper flange 2211 and the lower flange 2212, the bottom ends of the bolts 2213 are threadedly connected to the hexagonal nuts 2214, the top cover 223 and the warehouse body 221 are connected by flanges, which makes it convenient to remove the top cover 223, and the spiral baffle 227 can be taken out to facilitate subsequent cleaning.

[0032] Embodiment 3:

[0033] See also Figure 1-4 , which is the second embodiment of the utility model. This embodiment is based on the previous embodiment. The utility model forms a heat pump system through the waste heat recovery component 2, thereby realizing the recycling of flue gas heat energy, and the thermal energy utilization rate is high. The waste heat recovery component 2 is additionally provided with a moisture separation component 22, which can process the flue gas discharged from the curing furnace. During the treatment, the flue gas with a high water content passes through the spiral baffle 227 to form a spiral cyclone flow channel. Under the influence of gravity, the moisture that is greatly affected by gravity will settle and separate, so that the moisture content in the hot air discharged from the exhaust port 225 is greatly reduced. The hot air is recycled into the curing furnace through the heat pump system to realize the reuse of the heat source, and due to the low moisture content, a low humidity is maintained, so that the humidity in the curing furnace will not increase excessively due to heat recovery, and the efficiency of drying and curing will not be affected.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas waste heat recycling mechanism for a drying and curing furnace, comprising a furnace body (1), characterized in that: One side of the top surface of the furnace body (1) is fixedly connected to and communicated with a smoke exhaust port (11), and one side of the bottom surface of the furnace body (1) is fixedly connected to and communicated with a heat recovery port (12), and waste heat recovery components (2) are provided on the smoke exhaust port (11) and the heat recovery port (12); The waste heat recovery component (2) comprises an induced draft fan (21), a moisture separation component (22), a heat pump unit (23), and a heat exchange chamber (24); The moisture separation component (22) comprises a warehouse body (221) and a water tank (222), wherein the water tank (222) is located below the warehouse body (221), a top cover (223) is provided on the top surface of the warehouse body (221), the bottom surface of the warehouse body (221) is fixedly connected to and communicates with a conical bottom shell (2215), and an air inlet (224) and an air outlet (225) are horizontally fixedly connected to both sides of the top surface of the warehouse body (221), and the air outlet (224) and the air outlet (225) are fixedly connected to the top surface of the warehouse body (221). 225) is connected to the interior of the warehouse body (221), the air inlet (224) is located inside the warehouse body (221) and is fixedly connected to a bent pipe (228) at one end, the bottom surface of the top cover (223) is vertically fixedly connected to a hollow vertical pipe (226), the hollow vertical pipe (226) is located inside the warehouse body (221) and is fixedly sleeved with a spiral baffle (227), and the bottom end of the bent pipe (228) is located above the spiral baffle (227).

2. The flue gas waste heat recycling mechanism for a drying and curing furnace according to claim 1, characterized in that: The induced draft fan (21) is fixedly connected to the side wall of the furnace body (1); one end of the induced draft fan (21) is fixedly connected to and connected to a first smoke pipe (25); the other end of the induced draft fan (21) is fixedly connected to a second smoke pipe (27); the free end of the first smoke pipe (25) is fixedly connected to and connected to a cover body (26); the cover body (26) is fixedly connected to and connected to a smoke exhaust port (11); and the free end of the second smoke pipe (27) is fixedly connected to and connected to an end of an air inlet (224).

3. The flue gas waste heat recycling mechanism for a drying and curing furnace according to claim 2, characterized in that: The heat pump unit (23) and the exhaust port (225) are fixedly connected and communicated with an air pipe (28), the heat pump unit (23) and the heat exchange chamber (24) are fixedly connected and communicated with a refrigerant medium pipe (29), and the heat exchange chamber (24) and the heat recovery port (12) are fixedly connected and communicated with a heat recovery pipe (210).

4. The flue gas waste heat recycling mechanism for a drying and curing furnace according to claim 1, characterized in that: The side wall of the bin body (221) is fixedly embedded with a plate-shaped shell (2219); the plate-shaped shell (2219) is located on one side inside the bin body (221) and is fixedly connected to a sensing plate (2221); a through groove (2220) is provided on the plate-shaped shell (2219); a sliding block (2222) is vertically slidably connected in the through groove (2220); and a non-contact liquid level sensor (2223) is fixedly connected to one side of the sliding block (2222) close to the sensing plate (2221).

5. The flue gas waste heat recycling mechanism for a drying and curing furnace according to claim 4, characterized in that: The through groove (2220) is vertically rotatably connected to a screw rod (2224); a threaded sleeve (2225) is fixedly connected to the slider (2222); the screw rod (2224) is threadedly connected to the threaded sleeve (2225); a bottom cavity (2226) is provided inside the bottom surface of the plate shell (2219); the bottom end of the screw rod (2224) is located in the bottom cavity (2226) and is fixedly connected to a driven bevel gear (2227); one side of the bottom cavity (2226) is rotatably connected to the active bevel gear The driving bevel gear (2228) is meshedly connected to the driven bevel gear (2227), the rotating shaft end of the driving bevel gear (2228) is horizontally fixedly connected to the damping shaft rod (2229), the bottom of the plate shell (2219) is rotatably connected to a knob (2230) on the side away from the bin body (221), the knob (2230) is fixedly connected to the end of the damping shaft rod (2229), and the damping shaft rod (2229) is rotatably sleeved in the plate shell (2219).

6. The flue gas waste heat recycling mechanism for a drying and curing furnace according to claim 1, characterized in that: The bottom surface of the conical bottom shell (2215) is fixedly connected to and communicated with a drainage pipe (2216); the bottom end of the drainage pipe (2216) is fixedly connected to and communicated with a drainage pump (2217); the drainage pump (2217) is fixedly connected to and communicated with the top surface of the water tank (222); a plurality of supporting legs (2218) are fixedly connected to the periphery of the storage body (221); the center of the top surface of the top cover (223) is vertically fixedly connected to a pressure relief port (229); the pressure relief port (229) is connected to a hollow vertical Inside the tube (226), the top end of the pressure relief port (229) is fixedly connected to and communicates with the protection valve (2210), the bottom surface of the top cover (223) is fixedly connected to the upper flange (2211), and the top surface of the bin body (221) is fixedly connected to the lower flange (2212). A plurality of bolts (2213) are vertically inserted on the upper flange (2211) and the lower flange (2212), and the bottom ends of the bolts (2213) are threadedly connected to the hexagonal nuts (2214).

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