阅读说明：本技术 一种炊用大锅灶 (Cooking large-pot stove ) 是由 夏光超 于 2021-07-22 设计创作，主要内容包括：本发明属于炉灶余热利用技术领域,具体涉及一种炊用大锅灶。本发明包括机架以及炉膛；炉膛包括炉膛壁以及炉膛底；炉膛之外套设有一层外形与炉膛外形适配的外壳体,外壳体与炉膛之间存有可供保温材料容纳的保温空间；该炊用大锅灶还包括热反射盘,所述热反射盘包括外形呈口径上大下小的喇叭口状的锥板,锥板的小口径端构成可供炉头伸入的配合端,锥板的大口径端由上而下的搭在炉膛壁的内壁处,从而将炉膛划分为上腔及下腔；锥板盘面处贯穿开设有进烟口,与进烟口连通的排烟管依序贯穿炉膛及外壳体。本发明可有效提升炉灶的燃烧热效率,并大大延长炉膛的实际使用寿命,且同步具备节能、长寿命和易维修维护的特点。(The invention belongs to the technical field of waste heat utilization of cooking ranges, and particularly relates to a large cooking range for cooking. The invention comprises a frame and a hearth; the hearth comprises a hearth wall and a hearth bottom; the outer of the hearth is sleeved with an outer shell with the shape matched with that of the hearth, and a heat insulation space for accommodating heat insulation materials is reserved between the outer shell and the hearth; the large cooking stove for cooking also comprises a heat reflection disc, wherein the heat reflection disc comprises a conical plate which is in a bell mouth shape with the caliber being large at the top and small at the bottom, the small-caliber end of the conical plate forms a matching end for the furnace end to extend into, and the large-caliber end of the conical plate is lapped on the inner wall of the hearth from top to bottom, so that the hearth is divided into an upper cavity and a lower cavity; the conical plate disk surface is provided with a smoke inlet in a penetrating way, and a smoke exhaust pipe communicated with the smoke inlet penetrates through the hearth and the outer shell in sequence. The invention can effectively improve the combustion heat efficiency of the stove, greatly prolongs the actual service life of the hearth, and has the characteristics of energy conservation, long service life and easy maintenance.)

1. A big cooking stove for cooking comprises a frame (20) and a hearth which is arranged on the frame (20) and used for heating a pot; the method is characterized in that: the hearth comprises a funnel-shaped hearth wall (31) with the caliber being large at the top and small at the bottom, and a cylindrical hearth bottom (32) which is arranged at the bottom end of the hearth wall (31) and has the inner diameter matched with the diameter of the small-caliber end of the hearth wall (31), wherein a matching hole for the furnace end to be plugged in from bottom to top is arranged on the bottom surface of the hearth bottom (32) in a penetrating manner; an outer shell (21) with the shape matched with that of the hearth is sleeved outside the hearth, and a heat insulation space for accommodating heat insulation materials is reserved between the outer shell (21) and the hearth; the large cooking stove for cooking also comprises a heat reflection disc (10), wherein the heat reflection disc (10) comprises a conical plate (11) with the shape of a bell-mouthed shape with a large caliber at the top and a small caliber at the bottom, a small caliber end of the conical plate (11) forms a matching end for a burner to extend into, and a large caliber end of the conical plate (11) is lapped at the inner wall of the hearth wall (31) from top to bottom so as to divide the hearth into an upper cavity and a lower cavity; the disk surface of the conical plate (11) is provided with a smoke inlet (11a) in a penetrating way, and a smoke exhaust pipe (13) communicated with the smoke inlet (11a) sequentially penetrates through the hearth and the outer shell (21).

2. The cooking pot and stove of claim 1, wherein: a heat exchange winding (40) is coaxially arranged in the heat insulation space; the heat exchange furnace ring (50) capable of holding cookware is arranged around a circle at the top hearth opening of the hearth wall (31), and the heat exchange furnace ring (50) and the heat exchange winding (40) are both connected with a water replenishing tank (61).

3. The cooking pot and stove of claim 1, wherein: the heat reflection disc (10) also comprises a cylindrical disc bottom (12) with an upward opening, the bottom caliber of the conical plate (11) is smaller than the inner diameter of the disc bottom (12), and the top caliber is larger than the inner diameter of the disc bottom (12); the tray bottom (12) is also provided with a hole path for the furnace end to pass through; the tray bottom (12) and an annular cavity channel formed by enclosing the conical plate (11) form a flue through which flue gas can pass, a smoke outlet (12a) is arranged at the tray bottom (12), and a smoke exhaust pipe (13) communicated with the flue extends outwards from the smoke outlet (12a) and penetrates through a hearth to form the flue.

4. A cooking pot as claimed in claim 1, 2 or 3, wherein: the cooking large cooking stove also comprises a waste heat utilization assembly used for carrying out heat exchange operation on the smoke at the smoke outlet (12), wherein the waste heat utilization assembly comprises a heat exchange water tank (63), an inlet pipe (62a), a heat exchange sleeve (62b), a heat exchange coil (62c) and a waste gas discharge pipe (62d) which are sequentially arranged along the smoke advancing path; the heat exchange sleeve (62b) is positioned in the cavity of the heat exchange water tank (63), one end of the inlet pipe (62a) is communicated with the smoke exhaust pipe (13), and the other end of the inlet pipe penetrates through the heat exchange water tank (63) and is communicated with the inlet of the heat exchange sleeve (62 b); the heat exchange sleeve (62b) and the heat exchange coil (62c) are coaxially arranged, and the outlet of the heat exchange sleeve (62b) is communicated with the inlet of the heat exchange coil (62 c); the outlet of the heat exchange coil (62c) is communicated with an exhaust gas outlet pipe (62 d).

5. The cooking pot and stove of claim 4, wherein: the heat exchange sleeve (62b) is in a cup shape with an upward opening, and a through hole (62g) with the aperture smaller than that of the cup opening of the heat exchange sleeve (62b) penetrates through the cup bottom of the heat exchange sleeve (62b), so that the top cup opening and the through hole (62g) at the bottom of the heat exchange sleeve (62b) are combined together to form a through flow guide cavity for the circulation and the passage of water in the heat exchange water tank (63).

6. The cooking pot and stove of claim 5, wherein: the outer wall of the heat exchange water tank (63) is in a two-section stepped shaft shape with a thick upper part and a thin lower part, a heat exchange coil (62c) is coaxially wound in a tank cavity where a large-diameter section of the heat exchange water tank (63) is located, a small-diameter section of the heat exchange water tank (63) radially extends out of a water bag pipe (63a) communicated with the tank cavity of the heat exchange water tank, and the inlet pipe (62a) is coaxially arranged in the water bag pipe (63 a); the outer wall of the top end of the heat exchange sleeve (62b) is provided with a cigarette gathering box (62f), the box cavity of the cigarette gathering box (62f) is communicated with the sleeve cavity of the heat exchange sleeve (62b), and the cigarette gathering box (62f) forms an outlet of the heat exchange sleeve (62 b).

7. The cooking pot and stove of claim 6, wherein: the waste heat utilization assembly also comprises a steam discharge pipe (64) communicated with an outlet at the top of the heat exchange water tank (63); the waste gas discharge pipe (62d) coaxially extends vertically upwards through a pipe cavity of the steam discharge pipe (64), then horizontally penetrates through the pipe wall of the steam discharge pipe (64) and penetrates into a box cavity of the water replenishing tank (61) located on the side, then penetrates out of the water replenishing tank (61) to form a waste discharge port (62e), and the water replenishing tank (61) and the water drum pipe (63a) are communicated with each other through a water replenishing pipeline (67).

8. The cooking pot as claimed in claim 7, wherein: set up steam box (65) above heat exchange water tank (63), through wet return (66) between the bottom surface of steam box (65) and the top surface of heat exchange water tank (63) with steam discharge pipe (64) intercommunication each other, steam discharge pipe (64) are used for drawing forth steam and leading-in steam box (65) in heat exchange water tank (63), and the steam outlet via steam box (65) discharges to external equipment again, and wet return (66) are used for flowing back to heat exchange water tank (63) with the condensate water in steam box (65) in.

9. The cooking pot and stove of claim 8, wherein: a water-vapor separation baffle plate (65a) is arranged on a communication hole which is arranged in the steam box (65) and through which the top end of the steam discharge pipe (64) can penetrate; the water-vapor separation baffle (65a) is fixed on one side of the communicating hole, and the water-vapor separation baffle (65a) firstly vertically extends upwards and then transversely extends to the position right above the communicating hole; the steam outlet (65b) is positioned above or behind the water-steam separation baffle (65 a); in the vertical direction, the communication hole is positioned in the projection range of the water-vapor separation baffle (65 a).

10. The cooking pot and stove of claim 4, wherein: the waste heat utilization assembly also comprises an explosion-proof pipe which runs through the heat exchange water tank (63) from bottom to top and then is communicated with the jacket cavity of the heat exchange jacket (62b), and an explosion-proof valve (68) is arranged at the explosion-proof pipe; the explosion-proof valve (68) comprises a horizontal rotating shaft (68a) arranged at one side wall of the explosion-proof pipe orifice, and a port closing plate (68b) is hinged on the horizontal rotating shaft (68 a); one end of the port sealing plate (68b) which seals the opening of the explosion-proof pipe from bottom to top under the hinging action of the horizontal rotating shaft is a closed end, the other end of the port sealing plate is a counterweight end, and a counterweight block (68c) is arranged at the counterweight end of the port sealing plate (68 b).

Technical Field

The invention belongs to the technical field of waste heat utilization of cooking ranges, and particularly relates to a large cooking range for cooking.

Background

A large number of cooking stoves are available in the Chinese market and are widely applied to canteens of institutions, enterprises, schools and the like. At present, most of large cooking stoves for cooking in the market adopt a traditional single-layer hearth structure, and the hearth is built by refractory bricks; although the manufacturing cost of the firebrick hearth is low, the firebrick hearth has the defects of easy cracking, poor heat reflection characteristic, high maintenance rate, low residual heat utilization rate and even no residual heat utilization, and needs to be solved urgently.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides the large cooking stove for cooking, which can effectively improve the combustion heat efficiency of the cooking stove, greatly prolongs the actual service life of a hearth, and synchronously has the characteristics of energy conservation, long service life and easy maintenance.

In order to achieve the purpose, the invention adopts the following technical scheme:

a big cooking stove for cooking comprises a frame and a hearth which is arranged on the frame and used for heating a pot; the method is characterized in that: the hearth comprises a funnel-shaped hearth wall with a large caliber at the top and a small caliber at the bottom, and a barrel-shaped hearth bottom which is arranged at the bottom end of the hearth wall and has the inner diameter matched with the diameter of the small caliber end of the hearth wall, wherein a matching hole for the furnace end to be plugged in from bottom to top is arranged on the bottom surface of the hearth bottom in a penetrating manner; the outer of the hearth is sleeved with an outer shell with the shape matched with that of the hearth, and a heat insulation space for accommodating heat insulation materials is reserved between the outer shell and the hearth; the large cooking stove for cooking also comprises a heat reflection disc, wherein the heat reflection disc comprises a conical plate which is in a bell mouth shape with the caliber being large at the top and small at the bottom, the small-caliber end of the conical plate forms a matching end for the furnace end to extend into, and the large-caliber end of the conical plate is lapped on the inner wall of the hearth from top to bottom, so that the hearth is divided into an upper cavity and a lower cavity; the conical plate disk surface is provided with a smoke inlet in a penetrating way, and a smoke exhaust pipe communicated with the smoke inlet penetrates through the hearth and the outer shell in sequence.

Preferably, a heat exchange winding is coaxially arranged in the heat insulation space; the heat exchange furnace ring capable of being used for placing cookware is arranged at the top hearth opening of the hearth wall in a circle, and the heat exchange furnace ring and the heat exchange winding are both connected with the water replenishing tank.

Preferably, the heat reflection disc also comprises a cylindrical disc bottom with an upward opening, the caliber of the bottom of the conical plate is smaller than the inner diameter of the disc bottom, and the caliber of the top of the conical plate is larger than the inner diameter of the disc bottom; the bottom of the plate is also provided with a hole path for the furnace end to pass through; the tray bottom and the annular cavity channel formed by enclosing the conical plates form a flue through which flue gas can pass, a smoke outlet is arranged at the tray bottom, and a smoke exhaust pipe communicated with the flue extends outwards from the smoke outlet and penetrates through the hearth to form the flue.

Preferably, the large cooking stove for cooking also comprises a waste heat utilization assembly for performing heat exchange operation on the smoke at the smoke outlet, wherein the waste heat utilization assembly comprises a heat exchange water tank, an inlet pipe, a heat exchange sleeve, a heat exchange coil and a waste gas outlet pipe which are sequentially arranged along the smoke advancing path; the heat exchange sleeve is positioned in the cavity of the heat exchange water tank, one end of the inlet pipe is communicated with the smoke exhaust pipe, and the other end of the inlet pipe penetrates through the heat exchange water tank and is communicated with the inlet of the heat exchange sleeve; the heat exchange sleeve and the heat exchange coil are coaxially arranged, and an outlet of the heat exchange sleeve is communicated with an inlet of the heat exchange coil; the outlet of the heat exchange coil is communicated with a waste gas discharge pipe.

Preferably, the heat exchange sleeve is in a cup shape with an upward opening, and a through hole with a diameter smaller than the caliber of the cup opening of the heat exchange sleeve penetrates through the cup bottom of the heat exchange sleeve, so that the top cup opening and the bottom through hole of the heat exchange sleeve are combined together to form a through flow guide cavity for water and liquid in the heat exchange water tank to flow circularly.

Preferably, the outer wall of the heat exchange water tank is in a two-section stepped shaft shape with a thick upper part and a thin lower part, the heat exchange coil is coaxially wound in a tank cavity where the large-diameter section of the heat exchange water tank is located, the small-diameter section of the heat exchange water tank radially extends out of a water drum pipe communicated with the tank cavity of the heat exchange water tank, and the inlet pipe is coaxially arranged in the water drum pipe; the outer wall of the top end of the heat exchange sleeve is provided with a cigarette gathering box, the box cavity of the cigarette gathering box is communicated with the sleeve cavity of the heat exchange sleeve, and the cigarette gathering box forms an outlet of the heat exchange sleeve.

Preferably, the waste heat utilization assembly further comprises a steam discharge pipe communicated with an outlet at the top of the heat exchange water tank; the waste gas discharge pipe is coaxially vertically and upwardly extended through a pipe cavity of the steam discharge pipe, then horizontally penetrates through the pipe wall of the steam discharge pipe and penetrates into a water replenishing tank cavity located beside, then penetrates out of the water replenishing tank and forms a waste discharge port, and the water replenishing tank and the water drum pipe are communicated with each other through a water replenishing pipeline.

Preferably, a steam box is arranged above the heat exchange water tank, the bottom surface of the steam box and the top surface of the heat exchange water tank are communicated with each other through a water return pipe and a steam discharge pipe, the steam discharge pipe is used for leading steam out of the heat exchange water tank and into the steam box, then the steam is discharged to external equipment through a steam outlet of the steam box, and the water return pipe is used for returning condensed water in the steam box to the heat exchange water tank.

Preferably, a water-vapor separation baffle is arranged on a communication hole which is arranged in the steam box and through which the top end of the steam discharge pipe can penetrate; the water-vapor separation baffle is fixed on one side of the communicating hole, vertically and upwardly extends, and then transversely extends to a position right above the communicating hole; the steam outlet is positioned above or behind the water-steam separation baffle; in the vertical direction, the communicating hole is positioned in the projection range of the water-vapor separation baffle.

Preferably, the waste heat utilization assembly further comprises an explosion-proof pipe which penetrates through the heat exchange water tank from bottom to top and is communicated to the heat exchange jacket cavity, and an explosion-proof valve is arranged at the explosion-proof pipe; the explosion-proof valve comprises a horizontal rotating shaft arranged on one side wall of the pipe orifice of the explosion-proof pipe, and a port sealing plate is hinged on the horizontal rotating shaft; the end of the opening of the explosion-proof pipe is closed from bottom to top under the hinging action of the horizontal rotating shaft by the port sealing plate, the closed end is the other end of the opening of the explosion-proof pipe, and the counterweight block is arranged at the counterweight end of the port sealing plate.

The invention has the beneficial effects that:

1) by the scheme, on the one hand, the design of the heat preservation space effectively reduces the surface temperature of the cooking stove, and when higher waste heat utilization efficiency is obtained, the heat emission of the cooking stove is reduced, the service life of cooking stove equipment is effectively prolonged, and a chef can be prevented from being scalded by high temperature. Compared with the traditional stove which needs to flow tap water over the stove top for a long time to cool down during the operation of the stove, the stove generally consumes 0.3-0.5 ton of tap water per hour, and the design of the invention can also avoid wasting a large amount of tap water, thereby leading the invention to have the characteristics of energy conservation and emission reduction. On the other hand, the heat reflecting disks are naturally overlapped from top to bottom by means of gravity, so that the hearth wall is isolated to form an upper cavity dividing structure and a lower cavity dividing structure; during operation, heat energy is gathered in the upper chamber, and the flue gas is guided out through advancing the mouth afterwards, and this not only further promotes the combustion thermal efficiency of kitchen range through the heat reflection of heat reflecting disc, also through the natural overlap joint formula assembly of heat reflecting disc simultaneously to realize its function of easy maintenance, kill many birds with one stone.

2) During actual design, the heat exchange furnace ring is arranged at the top hearth opening of the whole hearth, so that the function of sealing the hearth by matching with a pot can be achieved; the heat exchange winding is buried in the heat insulation material, so that the effect of further collecting and utilizing heat energy is realized.

3) During actual design, the plate bottom and the conical plate are matched to form the heat reflection plate with a combined structure, so that the formation of a flue is guaranteed, the surrounding type heating effect of high-heat smoke is realized, the manufacturing cost is reduced, and the cost performance of the heat reflection plate can be effectively improved. In addition, the conical plate can be regarded as a part of the cylinder cavity of the heat reflecting disc and the top surface of the heat reflecting disc, so that when the conical plate extends outwards along the self conical surface and goes over the barrel mouth of the disc bottom, the conical plate can be naturally lapped at the hearth wall, and the maximization of the heat efficiency is ensured, and meanwhile, the simple and convenient assembly effect is realized.

4) The design purpose of the waste heat utilization assembly is naturally completely to maximize waste heat utilization, namely theoretically, the lower the smoke heat when the smoke heat is exhausted to the external environment by the waste gas exhaust pipe is, the better the heat absorption design of the large cooking stove for cooking is important, and the heat absorption design is also the root cause that the heat exchange effects generated by different heat exchange assemblies are different greatly.

The invention abandons the traditional simple and low-efficiency 'gas-in-water' or 'water-in-gas' type heat exchange structure, and forms a traveling path of flue gas by adopting a line layout mode of an inlet pipe, a heat exchange sleeve, a heat exchange coil and a waste gas discharge pipe, and arranges a heat exchange water tank and the heat exchange coil on the traveling path in sequence from near to far, thereby utilizing a multi-stage 'gas-in-water' mode with higher heat exchange efficiency, meeting the normal heating requirement of the stove, maximally realizing the purpose of high-efficiency utilization of waste heat in the stove, and finally heating water between the heat exchange sleeve and the heat exchange water tank to form hot water. After heat absorption is carried out in the mode of gas-in-water, the temperature of the outlet of the waste gas exhaust pipe is enough to meet the actual emission requirement. Through the structure, the high-temperature waste heat of the flue gas exhausted from the hearth can be absorbed by the water in the hot water tank to a great extent to generate hot water or steam, and the generated hot water or steam is led out through the water supply and drainage pipe or the steam outlet, so that the waste heat utilization efficiency of the existing stove is obviously and effectively improved.

5) The heat exchange sleeve can be of a conventional hollow pipe structure, and can also be of a 'water-in-air' structure such as a radiating fin or a coil pipe, and when the heat exchange sleeve is actually operated, water liquid is filled in the heat exchange water tank. The invention preferably adopts a cup-shaped structure with a hole at the bottom end, so that when high-temperature flue gas in the heat exchange sleeve passes through, water in the heat exchange water tank can be driven to generate rapid temperature rise change, heated hot water can surround the outer wall of the heat exchange sleeve to generate a circulation effect under the restraint of the heat exchange sleeve, and the efficiency of water liquid temperature rise can be greatly improved. In addition, the aperture of the through hole should be smaller than the caliber of the cup opening of the heat exchange sleeve, so that when water liquid passes through the through hole from bottom to top, the current limiting phenomenon can be generated, the cup cavity of the heat exchange sleeve forms a water boiling structure similar to a pot to a certain extent, the contact area is larger, the high-temperature smoke forms a ring-wrapping type heating effect on water in the cup structure, the heat exchange efficiency is further improved, and meanwhile, the water liquid flowing through the through hole from bottom to top at a lower part and at a lower temperature can automatically supplement water into the cup structure.

6) And the heat exchange water tank is also extended with a water bag pipe, so that when the flue gas is just led out from the hearth wall, the flue gas is further coated by a water bag gas structure of the water bag pipe for heat exchange. On the other hand, even if the water in the hot water tank is boiled, the flue gas is cooled by the heat exchange sleeve and the heat exchange coil in sequence, and then is absorbed by the steam-water mixture sprayed upwards in the flue gas when passing through the waste gas discharge pipe at the vertical section. And the flue gas enters the heat exchange structure in the water replenishing tank from the vertical section of the waste gas discharge pipe and then is absorbed by cold water in the water replenishing tank again, and finally, the low-temperature exhaust effect is realized. The water replenishing tank has the function of replenishing water into the tank body, and the water replenishing tank can directly provide hot water after primary heating through the waste gas discharge pipe.

In addition, it should be noted that the water outlet path at the water replenishing tank is a water inlet ladle pipe, and then enters the corresponding heat exchange water tank or even the steam discharge pipe in sequence, that is, the water replenishing path of the water replenishing tank just forms a hot-to-cold passing cooling path for the flue gas, and simultaneously ensures that the hottest flue gas is just matched with the water with the lowest relative temperature, so that the purpose of maximum heat exchange in the flue gas is ensured, and the effect is very obvious.

7) The invention has the water heating function under the utilization of waste heat under the condition of independently using the heat exchange water tank, thereby being capable of supplying corresponding hot water. Under the condition of adding a steam discharge pipe and a steam box, the invention can also realize an additional steam collection function. When using the steam chest, both guaranteed that steam can discharge to external equipment along steam outlet, can guarantee again through the effect of wet return and steam separation baffle that steam-water separation is guaranteed, in the separated hot water flows back to heat transfer water tank through the wet return.

8) The explosion-proof valve can form a seesaw-like balance torque system at the opening of the explosion-proof pipe. When the stove is not used and is in normal combustion, the resistance moment formed by the counterweight end of the port sealing plate can keep the port sealing plate closed; however, when the furnace wall deflagration takes place, the flue gas pressure that increases suddenly will conduct to heat transfer water tank to push open the port shrouding, thereby release away in the twinkling of an eye high pressure through "green passageway", in order to play the safety protection function. And after the pressure relief is finished, the port sealing plate is closed, so that the explosion-proof effect is achieved. Another use of this design is for blowdown: when the temperature of the flue gas in the heat exchange sleeve is lower than the dew point temperature, condensation and condensation can occur, and a small amount of acidic substances such as: NO_x、CO₂And the condensate water is weakly acidic, and the design of the invention is convenient for the acidic condensate water to slide to the port sealing plate under the action of gravity. A small amount of water leaks from a gap between the port and the sealing plate, when more condensed water is accumulated in a vertical pipeline at the upper end of the port, and when the height of the sealing plate reaches a sufficient height, the acting torque generated by the pressure can overcome the resisting torque of a torque system to push the sealing plate open, so that the effect of sewage discharge is achieved.

Drawings

FIG. 1 is a schematic structural diagram of the waste heat utilization assembly of the present invention after removal;

FIG. 2 is an assembly view of the structure of the present invention;

FIGS. 3 and 4 are schematic structural views of a waste heat utilization assembly of a hot water type embodiment;

fig. 5 and 6 are schematic structural views of a waste heat utilization assembly of the steam type embodiment.

The actual correspondence between each label and the part name of the invention is as follows:

10-Heat reflecting disc

11-conical plate 11 a-smoke inlet 12-tray bottom 12 a-smoke outlet 13-smoke exhaust pipe

20-frame 21-outer shell 31-hearth wall 32-hearth bottom

40-heat exchange winding 50-heat exchange furnace ring

61-water replenishing tank 62 a-inlet pipe 62 b-heat exchange sleeve 62 c-heat exchange coil

62 d-exhaust gas discharge pipe 62 e-exhaust port 62 f-smoke gathering box 62 g-through hole

63-Heat exchange Water tank 63 a-Water bag pipe

64-steam outlet pipe 65-steam box 65 a-steam separation baffle 65 b-steam outlet

66-water return pipe 67-water supplementing pipeline

68-explosion-proof valve 68 a-horizontal rotating shaft 68 b-port sealing plate 68 c-balancing weight

Detailed Description

For ease of understanding, the specific construction and operation of the present invention is further described herein with reference to FIGS. 1-6:

the waste heat utilization assembly of the invention has two specific implementation categories of a hot water type heat exchanger shown in figures 1-4 and a steam type heat exchanger shown in figures 5-6 according to the difference of field application objects. As the name suggests, the hot water type heat exchanger is used for realizing the design function of converting waste heat into hot water, and the steam type heat exchanger further realizes the design purpose of converting waste heat into steam. The steam type heat exchanger is relatively more complicated in structure than the hot water type heat exchanger because the steam discharge pipe 64, the water return pipe 66, the steam separation baffle 65a, and the like are additionally provided.

Specific embodiments of the present invention are described below with reference to fig. 1-4, using a hot water type heat exchanger:

the structure of the specific embodiment of the invention is shown in fig. 5-6, and the main structure of the invention is formed by matching a heat exchange furnace ring 50, a heat reflection disc 10, a hearth, an outer shell 21, a heat exchange winding 40 and a corresponding waste heat utilization assembly. As shown in fig. 1-2, the hearth and the outer shell 21 are both made of high-temperature resistant metal materials and both present inverted conical shapes; and a fit clearance is formed by matching the heat exchange winding and the heat insulation material, and the fit clearance forms a heat insulation space which can be filled with the heat exchange winding 40 and the heat insulation material. The furnace can be seen as being formed by the connection of the furnace walls 31, which constitute the upper furnace, and the furnace floor 32, which constitutes the lower furnace. The upper hearth and the lower hearth are separated by a concave-structure conical high-temperature-resistant heat reflection disc 10, the upper edge of the heat reflection disc 10 is lapped on the inner wall of the upper hearth, so that high-temperature flue gas is reduced to the greatest extent and directly permeates into the lower hearth from the lapping gap; the lower part is connected with the outer side wall of the furnace end. The concave surface of the conical plate 11 at the position of the heat reflecting disc 10 is provided with a plurality of through holes for hot smoke to pass through, so that a smoke inlet 11a is formed; the lower hearth is surrounded by a barrel-shaped hearth bottom 32, the upper edge of the hearth bottom 32 extends upwards to be connected with the lower edge of the conical inner wall of the upper hearth, and the furnace end penetrates from top to bottom and is fixed on the hearth bottom 32 through threads or bolts. In addition, the upper furnace chamber, i.e. the furnace chamber wall 31, can be provided with a hole at the six o' clock position in an inclined manner, which is convenient for installing the fire observation cylinder.

Obviously, the invention has the characteristics of ingenious structure, easy manufacture, high waste heat utilization efficiency, small heat loss and convenient maintenance, and can effectively improve the heat efficiency of the large cooking stove. The part bearing high temperature in the hearth is a heat reflection disc 10, the part is made of high temperature resistant and corrosion resistant metal materials, and is easy to disassemble and assemble, and the use and the maintenance are very convenient.

Further, the heat reflection plate 10 may further include a plate bottom 12, that is, the plate bottom 12 and the conical plate 11 are formed in cooperation. More specifically, during operation, the heat reflection plate 10, the burner, the heat exchange ring 50 and the pot form a relatively closed combustion area cavity, and the conical plate 11 is further provided with a plurality of smoke inlets 11a for passing hot smoke. The upper edge of the heat reflection plate 10 naturally depends on gravity to lean against the hearth wall 31; or the positional relationship with respect to the furnace wall 31 is maintained by the supporting force applied by the tray bottom 12. The bottom surface of the tray bottom 12 of the heat reflection tray 10 is provided with a large smoke outlet 12a for extending outwards to form a smoke exhaust pipe 13 for guiding high-temperature smoke into a corresponding structure at the rear part of the stove.

Therefore, the design of the hearth can ensure that when the pot is flatly placed on the heat exchange furnace ring 50, flame generated by combustion at the furnace end is just upwards sprayed and spread along the central position of the bottom of the pot, so that the effects of no deflection and uniform firepower are achieved; the design can effectively reduce the space of the cavity of the high-temperature combustion area of the hearth and reduce the heat loss, and meanwhile, the concave reflecting surface, namely the conical plate 11, can better reflect the heat to the lower part of the cooker in an infrared mode after being burnt red. When hot flue gas enters the annular flue in the heat reflection disc 10 from the cavity of the high-temperature combustion area through the flue gas inlet 11a formed in the conical plate 11, the disc bottom 12 and the conical plate 11 can be heated, and heat in the hearth can be transferred to the heat exchange winding 40 wrapped in the heat insulation material in a heat radiation mode. The design of heat preservation space has effectively reduced the apparent temperature of kitchen range to when obtaining higher waste heat utilization efficiency, reduced the heat emission of kitchen range, effectively prolonged the life of kitchen range equipment, still can avoid the cook to be scalded by high temperature. Compared with the traditional stove which needs to flow tap water over the stove top for a long time to cool down during the operation of the stove, the stove generally consumes 0.3 to 0.5 ton of tap water per hour, and the design of the invention can avoid the waste of a large amount of tap water. The independent heat reflecting disc 10 can also effectively avoid the defect that the hearth is not easy to maintain after being burnt out, and the heat reflecting disc 10 is more convenient to replace.

Further, for a hot water type heat exchanger, the heat exchanger consists of a heat exchange assembly and a water replenishing tank 61; of course, when the cooling water system of the heat exchanger is pumped by an external water pump, the makeup tank 61 may not be specially designed. The heat exchange assembly comprises an internal smoke cavity and an external water cavity which are made of corrosion-resistant and high-temperature-resistant metal materials. The inner flue gas chamber comprises an inlet pipe 62a, a heat exchange jacket 62b, a heat exchange coil 62c and an exhaust gas outlet pipe 62 d; as shown in fig. 3-4, the inlet pipe 62a communicates with the smoke exhaust pipe 13 at the heat reflection plate 10 to receive the high temperature smoke. To increase the heat exchange surface area, the heat exchange jacket 62b may form a long cylindrical cup structure extending downward. The bottom of the cylindrical water cup structure is arranged below and close to the bottom of the heat exchange water tank 63, the upper edge of the cup opening is fixedly connected with the top plate of the heat exchange water tank 63 through a fixing piece, water filled in the cup is communicated with water in an external water cavity, and the bottom of the cup is provided with a through hole 62g in a penetrating mode; the external water chamber includes a water-in-water pipe 63a, a heat exchange water tank 63, and the like.

In operation, as shown in fig. 3-6, high temperature flue gas is input into the heat exchange sleeve 62b from the flue gas outlet 12a at the furnace chamber via the inlet pipe 62a, heat carried by the high temperature flue gas exchanges heat with water in the water drum pipe 63a, the primarily cooled hot flue gas enters the lower portion of the heat exchange water tank 63, and exchanges heat with water outside the heat exchange water tank 63 and inside the heat exchange sleeve 62b when flowing through a gap formed by the heat exchange water tank 63 and the cylindrical cup-shaped heat exchange sleeve 62 b. The further reduced temperature hot flue gas then enters the heat exchange coil 62 c. The heat exchange coil 62c is a plurality of high temperature resistant and corrosion resistant metal coils with multi-turn spiral structures, the inlet of the heat exchange coil is arranged on a small cigarette collecting boss protruding outwards in the middle of the heat exchange water tank 63, and the outlet of the heat exchange coil is arranged on the side wall of the cigarette collecting box 62f positioned above the heat exchange water tank 63. The cigarette converging box 62f is a flat cavity structure, and the water replenishing level of the whole heat exchange water tank 63 is slightly higher than that of the cigarette converging box 62 f. The upper part of the smoke gathering box 62f is provided with a first vertical pipe section of an exhaust gas discharge pipe 62d, and the exhaust gas discharge pipe 62d passes through the top plate of the heat exchange water tank 63 and then enters the steam discharge pipe 64. The low-temperature flue gas flows from the smoke trap box 62f into the steam discharge pipe 64 and flows laterally at a certain height into the horizontal section of the exhaust gas discharge pipe 62d installed in the water replenishment tank 61. The water inlet of the water replenishing tank 61 is connected with tap water, and the water outlet is connected with a water drum pipe 63a through a water replenishing pipeline 67.

The makeup water tank 61 is composed of a level meter for controlling water level and inflow, and a second vertical pipe section of an exhaust gas discharge pipe 62d in the makeup water tank 61, and a metal float ball at the level meter is used for controlling the final water level of the equipment. The structure of the exhaust gas discharge pipe 62d in the makeup tank 61 is a thin-walled metal pipe or a thin-walled metal tube bundle resistant to high temperature and corrosion. After entering the exhaust gas discharge pipe 62d in the water replenishing tank 61, the flue gas further exchanges heat with low-temperature tap water in the water replenishing tank 61, and is finally discharged to the atmosphere from the waste discharge port 62 e.

In addition, the invention is also provided with an explosion-proof pipe with an explosion-proof valve or a sewage draining outlet as shown in figures 3-6. The specific principle is as follows: the heat exchange water tank 63 and the heat exchange sleeve 62b are penetrated through by high temperature resistant and corrosion resistant metal pipes and extend to the outside atmosphere, and a horizontal rotating shaft 68a, a port closing plate 68b and a balancing weight 68c are fixedly arranged on one side of a port of the heat exchange water tank. By rotating shaft 68a horizontally, weight 68c and port seal plate 68b cooperate to form a "see-saw" type balanced torque system. When the stove is not used and the stove is in normal combustion, the resistance moment formed by the counterweight end of the port sealing plate 68b can keep the port sealing plate 68b closed; however, when the furnace chamber is deflagrated, the suddenly increased pressure of the flue gas is conducted to the heat exchange water tank 63 and pushes the port closing plate 68b open, so that the pressure relief effect is realized. When the pressure relief is finished, the port closing plate 68b is closed, thereby playing the role of explosion prevention. Another use of this design is for blowdown: when the temperature of the flue gas in the heat exchange sleeve 62b is lower than the dew point temperature thereof, condensation and condensation can occur, because there are a small amount of acidic substances in the flue gas, such as: NO_x、CO₂And the condensate water is weakly acidic, and the design of the invention is convenient for the acidic condensate water to slide to the port sealing plate 68b under the action of gravity. A small amount of water leaks from the gap between the port and the sealing plate 68b, when more condensate water is accumulated in the vertical pipeline at the upper end of the port, and when the height of the water reaches a sufficient level, the acting torque generated by the pressure can overcome the resisting torque of the torque system to push the sealing plate 68b away, so that the effect of draining sewage is achieved.

And as a steam type heat exchanger with a more complicated structure, the steam type heat exchanger consists of a heat exchange assembly, a steam box 65 and a water replenishing box 61. The heat exchange assembly comprises an inner smoke cavity and an outer water cavity which are made of corrosion-resistant and high-temperature-resistant metal materials. Similarly, the inner flue gas chamber includes an inlet tube 62a, a heat exchange jacket 62b, a heat exchange coil 62c, and an exhaust gas outlet tube 62 d; as shown in fig. 5-6, the inlet pipe 62a communicates with the smoke exhaust pipe 13 at the heat reflection plate to receive the high temperature smoke. Similarly, to increase the heat exchange surface area, the heat exchange jacket 62b may form a long cylindrical cup structure extending downward; the bottom of the cylindrical cup structure is arranged below and close to the bottom of the heat exchange water tank 63, the upper edge of the cup opening is fixedly connected with the top plate of the heat exchange water tank 63 through a fixing piece, water filled in the cup is communicated with water in an external water cavity, and the bottom of the cup is provided with a through hole 62g in a penetrating mode. The external water chamber includes a water-in-water pipe 63a, a heat exchange water tank 63, a steam discharge pipe 64, and the like. When a steam type heat exchanger is used, the upper end of the steam discharge pipe 64 needs to be connected with a steam box 65, and the steam box 65 comprises a water-steam separation baffle plate 65a, a water return pipe 66 and a steam outlet 65 b. The steam-water mixture generated in the outer water chamber is sprayed upward into the steam box 65 through the gap between the steam discharge pipe 64 and the exhaust gas discharge pipe 62d, and the sprayed steam-water mixture is blocked by the steam-water separation baffle 65 a. As shown in fig. 5 to 6, the moisture separation baffle 65a is in the form of an inverted "L" shaped arrangement, with the baffle of the upper transverse section being located directly above the steam discharge pipe 64 and the projected dimension being greater than the pipe diameter of the steam discharge pipe 64. After the steam-water mixture hits the steam separation baffle 65a, the kinetic energy of the water is absorbed and bounces off and falls back and converges to a return pipe 66 installed in the steam box 65 away from the steam outlet 65 b. As can be seen in FIG. 6, the water return pipe 66 is connected with the steam box 65 at a low position and is connected with the heat exchange water tank 63 at a lower position. The top of the steam box 65 is provided with a steam outlet 65b, a pressure release valve, a pressure gauge and the like.

It will, of course, be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.