CN105841502B - Utilize the cooking stove of waste heat for generating steam - Google Patents

Abstract

A stove that uses waste heat to generate steam, including a furnace body, a furnace head, and a water tank. The furnace body is composed of an inner furnace wall and an outer furnace wall. The hollow area surrounded by the inner furnace wall is the furnace. The furnace body is provided with a plurality of tubular furnace bars evenly spaced below the furnace. The furnace head includes an outer furnace ring, an inner furnace ring and a pot support ring. The lower end of the inner furnace ring is connected with the inner furnace wall. The lower end of the body supporting ring is connected with the outer furnace wall, and the cavity formed between the inner furnace wall, the outer furnace wall and the furnace head is a heating chamber, and the coil pipe surrounding the furnace is arranged in the heating chamber, and the upper part of the water tank is provided with a heating chamber. The steam pipe connected to the top of the chamber, the lower part of the water tank is provided with an outlet pipe connected to the bottom of the heating chamber, the top of the water tank is provided with an outlet pipe, and the water tank is provided with a water inlet between the steam pipe and the water outlet pipe, and a floating ball is arranged on the water inlet Inlet valve. The invention realizes efficient recovery of flue gas heat and automatic control of water inflow during the use of the cooker.

Description

Stoves that use waste heat to generate steam

technical field

The invention relates to kitchen utensils, in particular to a stove for generating steam by using waste heat.

Background technique

The heating principle of traditional stoves is to heat the bottom of the pot by directly burning fuel through the atmosphere. Although such a heating method can also achieve the purpose of heating the cooker, the heat generated by the flame and the high-temperature flue gas will overflow from the gap between the bottom of the pot and the stove, and the heat will not be fully utilized, resulting in a waste of energy. In the existing market, some stoves have been improved, and the waste heat of the flue gas of the stove can be used to generate hot water or steam, etc., but the heat transfer efficiency is low, and the utilization rate of waste heat is not high, resulting in the speed of steam generation. Slow, the effect is not obvious; and the existing steam energy-saving stoves need to manually add water regularly, otherwise the phenomenon of dry burning is easy to occur, causing the promotion of this type of product to be limited.

Contents of the invention

In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a stove that utilizes waste heat to generate steam, which can make full use of the waste heat of flue gas and quickly generate steam.

In order to solve the above problems, the technical scheme adopted in the present invention is as follows:

A stove that uses waste heat to generate steam, including a furnace body, a furnace head arranged above the furnace body, and a water tank for supplying water to the furnace body, the furnace body is composed of an inner furnace wall and an outer furnace wall, the The hollow area surrounded by the inner furnace wall is the furnace. The furnace body is evenly spaced with a plurality of tubular furnace bars under the furnace. The furnace ring, the inner furnace ring and the supporting ring of the pot body are circular rings arranged concentrically. The inner furnace ring is arranged inside the outer furnace ring. The bottom of the inner furnace ring is connected and closed with the bottom of the outer furnace ring. The gap between them is the flue gas channel, the support ring of the pot body is attached to the outside of the outer furnace ring, and forms a smoke inlet hole connected with the flue gas channel between the inner furnace ring, and the outer furnace ring is provided with a The air duct opening where the flue gas passage is connected, the lower end of the inner furnace ring is connected to the inner furnace wall, the lower end of the pan body support ring is connected to the outer furnace wall, and the inner furnace wall, the outer furnace wall and the furnace head form a The cavity is a heating chamber, the furnace bar communicates with the heating chamber, the heating chamber is provided with a coil around the furnace, one end of the coil is connected to the air duct, and the other end passes through the outer furnace wall to Extending outward, the bottom of the heating chamber is provided with a water inlet, the top is provided with a steam port, the upper part of the water tank is provided with a steam pipe connected to the steam port of the heating chamber, and the lower part of the water tank is provided with an outlet connected to the water inlet of the heating chamber. Water pipe, the top of the water tank is provided with an air outlet pipe, the water tank is also provided with a water inlet, and the water inlet is provided with a float water inlet valve.

Further, a suction fan is also provided, and the outwardly extending end of the coil pipe communicates with the suction fan.

Further, the grate is arranged obliquely, and the coil is a bellows.

Further, the angle between the grate and the horizontal plane is α, where 5°≤α≤10°.

Further, the inner hoop is provided with an air inlet on a side away from the air duct opening, and the width of the air inlet is not smaller than the diameter of the air duct opening.

Further, the space formed in the inner hoop is an inverted truncated conical cavity.

Further, the longitudinal section of the pot support ring is an outwardly convex arc.

Further, a safety valve is provided on the top of the water tank.

Further, the floating ball water inlet valve includes a connecting pipe, a diversion groove and a hollow floating ball arranged in sequence along the water flow direction, a sealing plug is movable in the connecting pipe, and the lower part of the diversion groove near one end of the connecting pipe is fixed on the connecting pipe. The rotating shaft on the pipe is pivotally connected with the connecting pipe, the upper part of the diversion groove close to the end of the connecting pipe is connected with the sealing plug, the hollow floating ball is arranged at the end of the diversion groove far away from the connecting pipe, and the diversion groove is provided with a guide vane to guide the flow The groove is provided with a diversion opening at the guide vane, and the distance L between the guide vane and the connection between the hollow floating ball and the guide tank is 1.5 times the diameter of the hollow float ball.

Further, the section of the diversion groove is U-shaped, and the width of the diversion groove is greater than the inner diameter of the connecting pipe.

Compared with the prior art, the beneficial effect of the present invention lies in that the stove using waste heat to generate steam according to the present invention adopts automatic water supply to realize unattended operation, and realizes the use of the stove through the setting of the internal coil and heating chamber. The efficient recovery of flue gas heat in the process has good promotion prospects; the bellows-shaped coil can provide a larger contact area and achieve more efficient heat exchange; the use of exhaust fans can better ensure the recovery of flue gas , to reduce the loss of flue gas from other positions; by setting the air inlet on the inner furnace ring of the burner, the fire is evenly distributed, ensuring the uniform heating of the cooker by the fire; the setting of the diversion port of the floating ball inlet valve avoids The influence of the water flow on the hollow floating ball when the water enters is eliminated, so as to realize the automatic control of the water intake; the safety valve can effectively prevent the steam pressure in the furnace from being too high when the outlet pipe is blocked, and avoid accidents.

Description of drawings

Fig. 1 shows a schematic structural view of a cooking stove utilizing waste heat to generate steam according to the present invention;

Fig. 2 shows a schematic structural view of the furnace head shown in Fig. 1;

Fig. 3 shows a perspective view of the inner furnace ring and the outer furnace ring shown in Fig. 1;

Fig. 4 shows a schematic structural view of the float water inlet valve shown in Fig. 1 .

Among them, 1 is the furnace body, 11 is the inner furnace wall, 12 is the outer furnace wall, 13 is the furnace, 14 is the heating chamber, 15 is the furnace bar, 16 is the coil pipe, 2 is the furnace head, 21 is the outer furnace ring, 22 221 is the air inlet, 23 is the pot body support ring, 24 is the flue gas passage, 25 is the smoke inlet, 26 is the air duct opening, 27 is the support block, 3 is the cooker, 4 is the suction fan, 5 is the Water tank, 51 is an air outlet pipe, 52 is a water outlet pipe, 53 is a steam pipe, 54 is a float water inlet valve, 541 is a sealing ring, 542 is a connecting pipe, 543 is a diversion groove, 544 is a hollow float ball, and 545 is a seal Plug, 546 is a rotating shaft, 547 is a guide vane, and 548 is a guide port.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1, the cooker that uses waste heat to generate steam according to the present invention includes a furnace body 1, which is arranged above the furnace body 1, and is used to support a burner 2 for cooking utensils 3, and a water tank 5 for adding water 1 to the furnace body , and a suction fan 4 for exhausting smoke. The furnace body 1 is composed of an inner furnace wall 11 and an outer furnace wall 12. The hollow area surrounded by the inner furnace wall 11 is a furnace hearth 13. The furnace head 2 includes an outer furnace ring 21 and an inner furnace ring 22. And the pot support ring 23, the bottom end of the inner furnace ring 22 is connected with the inner furnace wall 11, the bottom end of the pot support ring 23 is connected with the outer furnace wall 12, the inner furnace wall 11, the outer furnace wall The cavity formed between the furnace wall 12 and the furnace head 2 is a heating chamber 14 . The furnace body 1 is provided with a plurality of mutually parallel tubular furnace bars 15 evenly spaced below the furnace chamber 13, and the furnace bars 15 are made of seamless steel pipes. The furnace bar 15 communicates with the heating chamber 14, and the furnace bar 15 is arranged obliquely, and the angle between it and the horizontal plane is α, wherein 5°≤α≤10°.

A coil pipe 16 surrounding the furnace 13 is arranged in the heating chamber 14 . One end of the coil pipe 16 extends outward through the outer furnace wall 12 and is connected with the suction fan 4 . The coil pipe 16 is a corrugated pipe, which increases the contact area with the water in the heating chamber 14 and improves the heat transfer efficiency. The bottom of the heating chamber 14 is provided with a water inlet, and the top is provided with a steam port.

As shown in Figure 1-3, the outer furnace ring 21, the inner furnace ring 22 and the pot support ring 23 are concentric rings, the lower end of the inner furnace ring 22 is connected with the inner furnace wall 11, and the inner furnace The ring 22 is arranged inside the outer furnace ring 21 , the bottom of the inner furnace ring 22 is connected and closed with the bottom of the outer furnace ring 21 , and the gap between the inner furnace ring 22 and the outer furnace ring 21 is a flue gas channel 24 . The lower end of the pot support ring 23 is connected to the outer furnace wall 22, and the pot support ring 23 is attached to the outside of the outer furnace ring 21, and forms a smoke inlet hole communicating with the flue gas channel 24 between the inner furnace ring 22 25. The outer hoop 21 is provided with an air duct opening 26 communicating with the flue gas passage 24 , and the flue gas passage 24 communicates with the coil pipe 16 through the air duct opening 26 .

The space formed in the inner furnace ring 22 is an inverted truncated conical cavity connected with the furnace 13 , which matches the shape of the bottom of the cooker 3 , so that the fire is evenly distributed at the bottom of the cooker 3 . The inner hoop 22 is provided with an air inlet 221 on the side away from the air duct opening 26, the width of the air inlet 221 is not less than the diameter of the air duct opening 26, and the air inlet 221 increases the smoke inlet 25 at the air inlet 221. The area of the air inlet. The flue gas channel 24 is provided with support blocks 27 on both sides of the air inlet 221 for fixing the inner furnace ring 22 and the outer furnace ring 21 .

The longitudinal section of the pot support ring 23 is an outwardly convex arc, and the gap between the pot support ring 23 and the outer furnace ring 21 is a steam channel 28 , and the steam channel 28 communicates with the heating chamber 14 .

The upper part of the water tank 5 is provided with a steam pipe 53 communicating with the steam outlet at the top of the heating chamber 14 , and the lower part is provided with a water outlet pipe 52 communicating with the water inlet at the bottom of the heating chamber 14 . The top of the water tank 5 is provided with an air outlet pipe 51 for delivering the steam in the water tank 5 through the steam pipe 53 and outputting it to external steam using equipment. Described water tank 5 is provided with water inlet between steam pipe 53 and water outlet pipe 52, and described water inlet is provided with float water inlet valve 54, and float ball water inlet valve 54 can control the water level in water tank 5, thereby realizes to The furnace body 1 is automatically filled with water.

A sealing ring 541 is provided at the joint between the float water inlet valve 54 and the water tank 5 to ensure the sealing of the water inlet.

The top of water tank 5 is also provided with safety valve 55, when preventing outlet pipe 51 from clogging, steam pressure is too high in water tank 5, avoids the generation of accident.

As shown in Figure 4, the floating ball water inlet valve 54 includes a connecting pipe 542, a diversion groove 543 and a hollow floating ball 544 arranged in sequence along the direction of water flow. The lower part of one end of the pipe 542 is pivotally connected with the connecting pipe 542 through the rotating shaft 546 fixed on the connecting pipe 542, and the upper part of the diversion groove 543 close to one end of the connecting pipe 542 is connected with the sealing plug 545, and the hollow floating ball 544 is arranged in the diversion groove 543 One end away from the connecting pipe 542 is provided with a deflector 547 on the deflector 543 , and the deflector 543 is provided with a deflector 548 at the deflector 547 , the deflector 547 is connected with the hollow floating ball 544 and the deflector 543 The distance L between the joints is 1.5 times the diameter of the hollow floating ball 544; the setting of the position of the diversion port 548 avoids the influence of the water flow on the hollow floating ball 544 during water intake, so that the automatic control of water intake can be realized more finely .

The hollow floating ball 544 is made of stainless steel, the stainless steel ball has a long service life, and the ball is not easy to cause pollution.

The diversion groove 543 section is U-shaped, and the diversion groove 543 width is greater than the inner diameter of the connecting pipe 542, and the water entering at the connecting pipe 542 can enter the water tank 5 by the diversion groove 543 through the diversion port 548, so as to reduce the impact of the water flow when entering the water. The effect of the hollow float 544.

The cooking range of the present invention utilizes waste heat to generate steam, and its working process is as follows:

Inject an appropriate amount of water into the heating chamber 14 through the water tank 5, the water level in the water tank 5 is lower than the height of the steam pipe 53, ignite the fuel arranged in the furnace 13, and the generated fire heats the cooker 3; start the suction fan 4 , so that the high-temperature exhaust gas generated by combustion enters the flue gas passage 24 through the smoke inlet hole 25, and the exhaust gas enters the coil 16 from the air duct opening 26 through the flue gas passage 24; The exhaust gas flow rate is relatively large, and the distribution of the fire produces a certain deviation with the movement of the exhaust gas; due to the setting of the air inlet 221, the area of the smoke inlet hole 25 is larger on the side away from the air duct opening 26, which increases the exhaust gas flow in the air inlet. The flow at the tuyere 221 is balanced with the waste gas flow at the air inlet 26 near the air duct opening 26, so that the fire distribution in the inner furnace ring 22 is relatively uniform, thereby ensuring the even heating of the cooker 3 by the fire; at the same time, The furnace fire burns to heat the grate 15, and the water in the grate 15 and the water in the heating chamber 14 form a convection flow, so that the water in the heating chamber 14 is continuously heated to boiling to generate steam, and the grate 15 arranged obliquely ensures that the grate 5. The effective heat convection between the inner water and the heating chamber 14 can discharge the steam generated in the furnace bar 15 at the same time; after the high-temperature flue gas enters the coil 16, the coil 16 has a higher temperature, and the water in the heating chamber 14 and the coil 16 and the outer wall of the furnace 13 perform heat exchange, fully utilize the residual heat of the flue gas, and accelerate the steam generation speed, and the steam produced is output to the external steam using equipment through the outlet pipe 51.

The cooking stove using waste heat to generate steam according to the present invention adopts automatic water supply to realize unattended operation, and through the setting of internal coils and heating chambers, the efficient recovery of flue gas heat during the use of the cooking stove is realized, which has good promotion Prospect; the bellows-shaped coil can provide a larger contact area and achieve more efficient heat exchange; the use of the exhaust fan can better ensure the recovery of flue gas and reduce the loss of flue gas from other locations; The air inlet is set on the inner furnace ring of the head, so that the fire is distributed evenly, which ensures the uniform heating of the cooker by the fire; Realize the automatic control of water inlet; the safety valve can effectively prevent the steam pressure in the furnace body from being too high when the outlet pipe is blocked, and avoid accidents.

Those skilled in the art can make various other corresponding changes and deformations according to the above-described technical solutions and concepts, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims (8)

1. A kind of 1. cooking stove using waste heat for generating steam, it is characterised in that：Including furnace body (1), the stove being arranged on above furnace body (1) Head (2), and the water tank (5) for supplying water to furnace body (1), the furnace body (1) combined by internal protecting wall (11) and outer furnace wall (12) and Into the internal protecting wall (11) is burner hearth (13) around the hollow area formed, between the furnace body (1) is uniform in burner hearth (13) lower section Every being provided with multiple tubulose fire bars (15), the burner (2) includes outer furnace ring (21), interior stove circle (22) and pot body support ring (23), the outer furnace ring (21), interior stove circle (22) and pot body support ring (23) are the annulus that is arranged concentrically, the interior stove circle (22) Be arranged on the inside of outer furnace ring (21), interior stove circle (22) bottom is connected closure with outer furnace ring (21) bottom, the interior stove circle (22) and Gap between outer furnace ring (21) is exhaust gases passes (24), and the pot body support ring (23) is fitted on the outside of outer furnace ring (21), and The smoke intaking hole (25) that is connected with exhaust gases passes (24) is formed between interior stove circle (22), be provided with the outer furnace ring (21) and The wind passage mouth (26) of exhaust gases passes (24) connection, the lower end of the interior stove circle (22) are connected with internal protecting wall (11), the pot body branch The lower end of pushing out ring (23) is connected with outer furnace wall (12), is formed between the internal protecting wall (11), outer furnace wall (12) and burner (2) Cavity is heating chamber (14), and the fire bars (15) is connected with heating chamber (14), is provided with the heating chamber (14) around stove The coil pipe (16) of thorax (13), one end of the coil pipe (16) are connected with wind passage mouth (26), the other end through outer furnace wall (12) to Outer extension, heating chamber (14) bottom are provided with water inlet, and top is provided with steam port, and water tank (5) top is provided with The steam pipe (53) connected with heating chamber (14) steam port, water tank (5) lower part are provided with and heating chamber (14) water inlet phase The outlet pipe (52) of connection, water tank (5) top are provided with air outlet pipe (51), water inlet are additionally provided with the water tank (5), Float ball inlet valve (54) is provided with the water inlet；The fire bars (15) is obliquely installed, and the coil pipe (16) is bellows；Institute State connecting tube (542), diversion trench (543) and hollow float that float ball inlet valve (54) includes setting gradually along water (flow) direction (544), sealing-plug (545) is movably set with connecting tube (542), diversion trench (543) is under connecting tube (542) one end Portion, is pivotally connected, diversion trench (543) is close to connecting tube by the shaft (546) and connecting tube (542) that are fixed in connecting tube (542) (542) top of one end is connected with sealing-plug (545), and hollow float (544) is arranged on diversion trench (543) away from connecting tube (542) one end, is provided with flow deflector (547) on diversion trench (543), diversion trench (543) is provided with flow deflector (547) place and leads Head piece (548), flow deflector (547) are hollow floating with the distance between the junction of hollow float (544) and diversion trench (543) L 1.5 times of ball (544) diameter.
2. 2. the cooking stove according to claim 1 using waste heat for generating steam, it is characterised in that：Suction ventilator (4) is additionally provided with, The outwardly extending one end of the coil pipe (16) is connected with suction ventilator (4).
3. 3. the cooking stove according to claim 1 using waste heat for generating steam, it is characterised in that：The fire bars (15) and level The angle in face is α, wherein 5 °≤α≤10 °.
4. 4. the cooking stove according to claim 1 using waste heat for generating steam, it is characterised in that：The interior stove circle (22) is remote Side from wind passage mouth (26) is provided with air inlet (221), and the width of the air inlet (221) is straight not less than wind passage mouth (26) Footpath.
5. 5. the cooking stove according to claim 1 using waste heat for generating steam, it is characterised in that：The interior shape of the interior stove circle (22) Into space be rounding taper type cavity.
6. 6. the cooking stove according to claim 1 using waste heat for generating steam, it is characterised in that：The pot body support ring (23) Longitudinal section be evagination arc.
7. 7. the cooking stove according to claim 1 using waste heat for generating steam, it is characterised in that：The top of the water tank (5) It is provided with safety valve (55).
8. 8. the cooking stove according to claim 1 using waste heat for generating steam, it is characterised in that：The diversion trench (543) is cut Face is U-shaped, and diversion trench (543) width is more than the internal diameter of connecting tube (542).