Waste heat recycling system of hotel integrated kitchen

Abstract

The waste heat recycling system comprises a cooking bench, a smoke exhaust ventilator and a plurality of stove cores, a cold water pipe and a hot water pipe are arranged on the inner side of the cooking bench, a heat absorption water tank is concentrically arranged on the cooking bench around each stove core, a partition plate is arranged in the heat absorption water tank, and the partition plate is arranged in the cooking bench. A plurality of heat absorption pipes arranged in rows are arranged in an exhaust fume collecting hood of the range hood, strip-shaped scrapers sleeve the heat absorption pipes, and a driving mechanism for driving the strip-shaped scrapers to move back and forth in the length direction of the heat absorption pipes is mounted on the exhaust fume collecting hood. A water inlet of the water inlet header pipe is connected with a tap water pipe, the water outlet header pipe is communicated with the cold water pipe through a down pipe, and a water outlet of the hot water pipe is sequentially connected with a temperature adjusting water tank and a heat preservation water tank. In conclusion, the waste heat recovery device has the advantages of being high in waste heat recovery rate, convenient to use hot water and capable of reducing environmental pollution.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen waste heat recovery, in particular to a waste heat recovery and utilization system for an integrated hotel kitchen. Background Art

[0002] In my country's eating habits, a large number of ingredients are fried, stir-fried, and deep-fried at high temperatures during cooking, which will produce a lot of oil smoke. These oil smoke have high temperature and humidity and are a good waste heat source. The hotel kitchen is an integrated structure of cabinets, kitchen utensils, and kitchen appliances. Its stoves are used every day to provide hotel customers with rich food. During the cooking process of these foods, only a part of the flame of the gas burning in the stove is sprayed on the bottom of the wok for cooking. The wok actually absorbs less than 50% of the heat. The remaining part will be discharged from the kitchen by the range hood along with the oil smoke, which will undoubtedly cause a lot of heat resources Waste, and it will also increase the temperature of the atmospheric environment. In order to reduce the waste of heat, it is necessary to recycle the waste heat in these oil fumes.

[0003] At present, cold water is mostly used to absorb the waste heat in the oil fume. When running, cold water flows in the water pipe, and the waste heat passes through the water pipe wall to the cold water, but there are often the following problems: First, due to the high oil content in the oil fume, a thick layer of oil will adhere to the water pipe after a period of use. These oils will hinder the transfer of heat and reduce the efficiency of heat transfer, resulting in a large amount of heat being discharged with the oil fume, thereby reducing the recovery rate of the waste heat in the oil fume; second, due to the characteristics of fluctuating and random oil fume, the temperature of the hot water generated is unstable, and there is a problem of inconvenience in using hot water, which cannot meet the demand for hot water. Therefore, it is an objective need to develop a waste heat recovery system for the hotel's integrated kitchen that has a high waste heat recovery rate, is convenient to use hot water, and can reduce environmental pollution. Utility Model Content

[0004] The utility model aims to provide a waste heat recovery and utilization system for an integrated hotel kitchen, which has high waste heat recovery rate, is convenient for using hot water and can reduce environmental pollution.

[0005] The purpose of the utility model is achieved in this way, including a stove, a range hood and a plurality of stove cores, a cold water pipe and a hot water pipe are arranged on the inner side of the stove, an annular hot water absorption tank is concentrically arranged on the stove around each stove core, a partition is arranged in the hot water absorption tank, the hot water absorption tanks on both sides of the partition are connected with the cold water pipe and the hot water pipe respectively through connecting pipes, a plurality of heat absorption tubes arranged in rows are arranged in the smoke collecting hood of the range hood, a strip scraper is sleeved on the heat absorption tube, a driving mechanism for driving the strip scraper to move back and forth along the length direction of the heat absorption tube is installed on the smoke collecting hood, a water inlet main pipe and a water outlet main pipe are respectively arranged at both ends of the heat absorption tube, the water inlet of the water inlet main pipe is connected with a tap water pipe, the water outlet main pipe is connected with the cold water pipe through a downcomer, and the water outlet of the hot water pipe is connected with a thermostatic water tank and an insulation water tank in sequence.

[0006] Furthermore, the driving mechanism includes a motor and a screw. The motor is installed on the smoke hood. The screw is arranged parallel to the heat absorption tube. The screw passes through the strip scraper and is threadedly connected to the strip scraper. One end of the screw is drivingly connected to the output shaft of the motor, and the other end is rotationally connected to the side wall of the smoke hood.

[0007] Furthermore, an oil collecting trough with an open upper end is arranged below the strip scraper.

[0008] Furthermore, grooves are symmetrically processed on two side surfaces of the lower part of the strip scraper, and bolts are screwed into the side walls of the oil collecting tank opposite to the grooves, with the ends of the bolts resting against the bottom of the grooves.

[0009] Furthermore, a plurality of heat dissipation plates are arranged on the inner wall of the heat absorption tank facing the stove core.

[0010] Furthermore, an agitator is arranged in the temperature-adjusting water tank, and the temperature-adjusting water tank is connected to the tap water pipe.

[0011] Furthermore, a thermometer, a circulation pipe and a choke valve are sequentially arranged at the water outlet of the hot water pipe along the water flow direction, the end of the circulation pipe is connected to the water inlet of the water inlet main pipe, and a circulation valve is arranged on the circulation pipe.

[0012] The utility model is used for waste heat recovery and utilization of the hotel's integrated kitchen. When cooking in the integrated kitchen, the pot is placed on the annular heat-absorbing water tank, the stove core sprays gas for combustion to provide the heat required for cooking, the tap water is introduced into the water inlet main pipe through the tap water pipe, and then divided into various heat-absorbing pipes, merged into the water outlet main pipe, introduced into the cold water pipe inside the stove through the downcomer, and then introduced into the heat-absorbing water tank through the connecting pipe, flows along the heat-absorbing water tank in an annular shape, flows into the hot water pipe through another connecting pipe, and merges into the temperature-adjusting water tank, the hot water after absorbing heat is mixed in the temperature-adjusting water tank to achieve temperature adjustment, and finally introduced into the heat-insulating water tank for storage and standby use. In the above process, part of the heat generated by the combustion of gas is absorbed by the pot for cooking dishes, and part of it is absorbed by the water in the heat-absorbing tank around the flame. The grease in the pot and the dishes are heated to generate oil smoke, which floats upward and contacts the heat-absorbing tube after entering the smoke collecting hood. The water in the heat-absorbing tube can absorb the heat in the oil smoke. The tap water first enters the heat-absorbing tube for the first heat absorption, and then enters the heat-absorbing tank for the second heat absorption. Through the two heat absorption processes, the waste heat dissipated during cooking in the hotel's overall kitchen is absorbed as much as possible, the heat content in the exhaust oil smoke is reduced, the heat loss and waste are reduced, the environmental pollution is reduced, and the waste heat is used to generate hot water for washing vegetables, washing dishes, cleaning kitchen utensils, etc.; secondly, a strip scraper is provided on the heat-absorbing tube, and a through hole is processed on the strip scraper. The strip scraper is mounted on the heat-absorbing tube through the through hole. When the heat-absorbing tube After a certain amount of grease adheres to the heat pipe, the driving mechanism is started, and the driving mechanism drives the strip scraper to move back and forth along the length direction of the heat absorption tube. During the movement, the through holes of the strip scraper scrape off the grease on the heat absorption tube to avoid the grease from hindering the heat transfer, ensuring the heat transfer efficiency and improving the recovery rate of waste heat in the oil fume; in addition, considering that the generation of oil fume will have the characteristics of fluctuating and randomness according to the cooking needs of the dishes, and the flame of the stove core will also fluctuate according to the cooking needs of the dishes, the amount of heat absorbed by the water is also unstable, which causes the problem of unstable water temperature after heat absorption. It is passed into the thermostatic water tank for uniform mixing, and the water temperature is relatively stable and easy to use after adjustment, and then it is collected into the thermal insulation water tank for storage and standby. In this way, the convenience of using hot water is improved, and the use needs of hot water can be better met. In summary, the utility model has the advantages of high waste heat recovery rate, convenient use of hot water, and reduced environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the midpoint A;

[0015] Figure 3 It is a schematic diagram of the top view of the structure of the heat absorption water tank 6 in the utility model;

[0016] Figure 4 It is a schematic diagram of the structure of the heat absorbing tube 9 and the driving mechanism in the utility model;

[0017] Figure 5 It is a schematic diagram of the structure of the heat absorbing tube 9 and the strip scraper 10 in the utility model;

[0018] In the figure: 1-stove, 2-range hood, 3-stove core, 4-cold water pipe, 5-hot water pipe, 6-heat absorption tank, 7-partition, 8-smoke hood, 9-heat absorption pipe, 10-strip scraper, 11-water inlet main pipe, 12-water outlet main pipe, 13-tap water pipe, 14-temperature regulating water tank, 15-insulating water tank, 16-motor, 17-screw, 18-oil collecting tank, 19-groove, 20-bolt, 21-heat sink, 22-mixer, 23-thermometer, 24-circulation pipe, 25-choke valve, 26-circulation valve, 27-down pipe. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the present invention belong to the protection scope of the present invention.

[0020] like Figures 1 to 5 As shown, the utility model comprises a stove 1, a range hood 2 and a plurality of stove cores 3, the stove 1, the range hood 2 and the plurality of stove cores 3 are all prior art, the stove core 3 is installed on the stove 1, the range hood 2 is used to extract the oil smoke in the kitchen, a cold water pipe 4 and a hot water pipe 5 are arranged on the inner side of the stove 1, an annular heat absorbing tank 6 is concentrically arranged on the stove 1 around each stove core 3, a partition 7 is arranged in the heat absorbing tank 6, the heat absorbing tank 6 on both sides of the partition 7 are connected with the cold water pipe 4 and the hot water pipe 5 through connecting pipes, a plurality of heat absorbing tubes 9 arranged in rows are arranged in the smoke collecting hood 8 of the range hood 2, a strip scraper 10 is mounted on the heat absorbing tube 9, and a drive hood 8 is installed. A driving mechanism is provided for the movable strip scraper 10 to reciprocate back and forth along the length direction of the heat absorbing tube 9. The driving mechanism is prior art and can drive the strip scraper 10 to move back and forth. A water inlet main pipe 11 and a water outlet main pipe 12 are respectively provided at both ends of the heat absorbing tube 9. The water inlet of the water inlet main pipe 11 is connected to a tap water pipe 13. The water outlet main pipe 12 is connected to the cold water pipe 4 through a downcomer 27. The water outlet of the hot water pipe 5 is connected to a thermostatic water tank 14 and an insulating water tank 15 in sequence. The thermostatic water tank 14 and the insulating water tank 15 are both prior art. The thermostatic water tank 14 is used to adjust the hot water temperature and average the hot water temperature. The insulating water tank 15 is used to store and keep the hot water warm so that the hot water can be taken at any time.

[0021] The utility model is used for waste heat recovery and utilization of the hotel's integrated kitchen. When cooking in the integrated kitchen, the pot is placed on the annular heat-absorbing water tank 6, the stove core 3 sprays gas for combustion to provide the heat required for cooking, the tap water is introduced into the water inlet main pipe 11 through the tap water pipe 13, and then the tap water is divided and flows into each heat-absorbing pipe 9, merged into the water outlet main pipe 12, and then introduced into the cold water pipe 4 inside the stove 1 through the downcomer 27, and then flows into the heat-absorbing water tank 6 through the connecting pipe, flows along the heat-absorbing water tank 6 in an annular shape, flows into the hot water pipe 5 through another connecting pipe, and merges into the temperature-adjusting water tank 14. The hot water after absorbing heat is mixed in the temperature-adjusting water tank 14 to achieve temperature adjustment, and finally introduced into the heat-insulating water tank 15 for storage and standby use. In the above process, part of the heat generated by the combustion of gas is absorbed by the pot for cooking dishes, and part of it is absorbed by the water in the heat-absorbing tank 6 around the flame. The grease in the pot and the dishes are heated to generate oil smoke, which floats upward and contacts the heat-absorbing tube 9 after entering the smoke collecting hood 8. The water in the heat-absorbing tube 9 can absorb the heat in the oil smoke. The tap water first enters the heat-absorbing tube 9 for the first heat absorption, and then enters the heat-absorbing tank 6 for the second heat absorption. Through the two heat absorption processes, the waste heat dissipated during cooking in the hotel's overall kitchen is absorbed as much as possible, the heat content in the exhaust oil smoke is reduced, the heat loss and waste are reduced, the environmental pollution is reduced, and the waste heat is used to generate hot water for washing vegetables, washing dishes, cleaning kitchen utensils, etc.; secondly, a strip scraper 10 is provided on the heat-absorbing tube 9, and a through hole is processed on the strip scraper 10. The strip scraper 10 is sleeved on the heat-absorbing tube 9 through the through hole. When the heat absorption tube 9 After a certain amount of grease adheres to the tube 9, the driving mechanism is started, and the driving mechanism drives the strip scraper 10 to move back and forth along the length direction of the heat absorbing tube 9. During the movement, the through holes of the strip scraper 10 scrape off the grease on the heat absorbing tube 9 to avoid the grease from hindering the heat transfer, ensuring the heat transfer efficiency and improving the recovery rate of waste heat in the oil fume; in addition, considering that the generation of oil fume will have the characteristics of fluctuating and randomness according to the cooking needs of the dishes, and the flame burning in the stove core 3 will also fluctuate according to the cooking needs of the dishes, the amount of heat absorbed by the water is also unstable, which causes the problem of unstable water temperature after heat absorption. It is passed into the thermostatic water tank 14 for uniform mixing. After adjustment, the water temperature is relatively stable and easy to use, and then it is collected in the thermal insulation water tank 15 for storage and standby. In this way, the convenience of using hot water is improved and the demand for hot water can be better met.

[0022] The driving mechanism includes a motor 16 and a screw 17. The motor 16 is an existing device and can be purchased according to parameters such as power. The motor 16 is installed on the smoke hood 8. The screw 17 is arranged in parallel with the heat absorbing tube 9. The screw 17 passes through the strip scraper 10 and is threadedly connected to the strip scraper 10. One end of the screw 17 is connected to the output shaft of the motor 16, and the other end is connected to the side wall of the smoke hood 8. During operation, the motor 16 drives the screw 17 to rotate, and the screw 17 drives the strip scraper 10 to translate when it rotates, so that the oil stains on the heat absorbing tube 9 can be scraped off during the translation process.

[0023] An oil collecting trough 18 with an open upper end is provided below the strip scraper 10. The strip scraper 10 is used to scrape off the oil stains adhering to the heat absorbing tube 9. After being scraped off, the oil stains will flow downward along the strip scraper 10 and then drip downward, causing pollution to the stove 1 below. It may also drip into the dishes being cooked, reducing the quality and taste of the dishes, and even causing the dishes to be scrapped. In order to avoid the above problems, an oil collecting trough 18 is provided. When the oil stains fall, they will fall into the oil collecting trough 18, and only need to be cleaned regularly.

[0024] Grooves 19 are symmetrically processed on the two side surfaces of the lower part of the strip scraper 10, and bolts 20 are screwed into the side walls of the oil collecting tank 18 opposite to the grooves 19, and the ends of the bolts 20 are against the bottom of the grooves 19. The oil collecting tank 18 is installed below the strip scraper 10 to receive oil stains, but with the extension of cooking time and the increase of oil stains, the oil stains in the oil collecting tank 18 need to be cleaned. In order to facilitate the disassembly and cleaning of the oil collecting tank 18, the strip scraper 10 is fixed with bolts 20. When disassembling and assembling, it is only necessary to loosen and tighten the bolts 20, and the disassembly of the oil collecting tank 18 is relatively convenient.

[0025] A plurality of heat sinks 21 are provided on the inner wall of the heat absorption tank 6 facing the stove core 3. Gas is ejected through the stove core 3 and burned. Part of the heat is absorbed by the pot for cooking food, and part of the heat is absorbed by the cold water in the heat absorption tank 6. The heat sink 21 is provided on the inner wall of the heat absorption tank 6 to expand the heat dissipation area, thereby improving the heat absorption efficiency and reducing heat loss and waste.

[0026] A stirrer 22 is provided in the thermostatic water tank 14, and the thermostatic water tank 14 is connected to the tap water pipe 13. The thermostatic water tank 14 is used to adjust the temperature of hot water. The stirrer 22 is a prior art. The hot water in the thermostatic water tank 14 is stirred by the stirrer 22 to average the temperature of hot water of various temperatures for subsequent use. When the temperature of the hot water is too high, cold water is introduced into the thermostatic water tank 14 through the tap water pipe 13, and the temperature of the hot water is lowered after being stirred by the stirrer 22.

[0027] The water outlet end of the hot water pipe 5 is provided with a thermometer 23, a circulation pipe 24 and a choke valve 25 in sequence along the water flow direction. The end of the circulation pipe 24 is connected to the water inlet of the water inlet main pipe 11. A circulation valve 26 is provided on the circulation pipe 24. The choke valve 25 and the circulation valve 26 are both existing valves, which can adjust the amount of circulating water or close it. The cold water first absorbs the heat in the oil smoke, and then absorbs the heat absorbed by the combustion of the gas through the heat absorption tank 6. The temperature of the cold water rises to form hot water. However, due to the requirements of cooking on the heat, the flame is sometimes large and sometimes small, the oil smoke generated is sometimes more and sometimes less, and the heat absorbed by the heat absorption tank 6 is also sometimes more and sometimes less. As a result, the temperature of the hot water is sometimes high and sometimes low. If the temperature of the hot water is too low, it is not conducive to subsequent use. In order to avoid this problem, before the hot water is passed into the temperature regulating water tank 14, the temperature of the hot water is monitored by a thermometer 23. When the monitored hot water temperature is too low, the choke valve 25 is closed and the circulation valve 26 is opened. The hot water with a low temperature returns to the cold water pipe 4 through the circulation pipe 24, absorbs the waste heat again to raise the water temperature. Until the hot water temperature reaches the requirement, the choke valve 25 is opened, the circulation valve 26 is closed, and the hot water enters the temperature regulating water tank 14. After temperature adjustment, it is convenient for subsequent use.

Claims

1. A waste heat recovery system for a hotel kitchen, comprising a stove (1), a range hood (2) and a plurality of stove cores (3), characterized in that A cold water pipe (4) and a hot water pipe (5) are arranged on the inner side of the stove (1); an annular heat absorbing tank (6) is concentrically arranged on the stove (1) around each stove core (3); a partition (7) is arranged inside the heat absorbing tank (6); the heat absorbing tanks (6) on both sides of the partition (7) are connected to the cold water pipe (4) and the hot water pipe (5) respectively through connecting pipes; a plurality of heat absorbing pipes (9) arranged in a row are arranged inside the smoke collecting hood (8) of the range hood (2); and strip scrapers are mounted on the heat absorbing pipes (9). The fume collecting hood (8) is provided with a driving mechanism for driving the strip scraper (10) to move back and forth along the length direction of the heat absorbing tube (9). A water inlet main pipe (11) and a water outlet main pipe (12) are respectively provided at both ends of the heat absorbing tube (9). The water inlet of the water inlet main pipe (11) is connected to a tap water pipe (13). The water outlet main pipe (12) is connected to a cold water pipe (4) through a downcomer (27). The water outlet of the hot water pipe (5) is connected to a temperature regulating water tank (14) and a heat preservation water tank (15) in sequence.

2. The waste heat recovery system for a hotel kitchen according to claim 1 is characterized in that The driving mechanism comprises a motor (16) and a screw (17), wherein the motor (16) is mounted on the smoke hood (8), the screw (17) is arranged in parallel with the heat absorbing tube (9), the screw (17) passes through the strip scraper (10) and is threadedly connected to the strip scraper (10), one end of the screw (17) is drivingly connected to the output shaft of the motor (16), and the other end is rotationally connected to the side wall of the smoke hood (8).

3. The waste heat recovery system for a hotel kitchen according to claim 1 is characterized in that An oil collecting trough (18) with an open upper end is provided below the strip scraper (10).

4. The waste heat recovery system for a hotel kitchen according to claim 3 is characterized in that Grooves (19) are symmetrically processed on two side surfaces of the lower part of the strip scraper (10), and bolts (20) are screwed into the side walls of the oil collecting tank (18) opposite to the grooves (19), with the ends of the bolts (20) resting against the bottom of the grooves (19).

5. The waste heat recovery system for a hotel kitchen according to claim 1 is characterized in that A plurality of heat dissipation plates (21) are arranged on the inner wall of the heat absorption tank (6) facing the stove core (3).

6. The waste heat recovery system for a hotel kitchen according to claim 1 is characterized in that The temperature-adjusting water tank (14) is provided with an agitator (22), and the temperature-adjusting water tank (14) is connected to the tap water pipe (13).

7. The waste heat recovery system for a hotel kitchen according to claim 1 is characterized in that The water outlet end of the hot water pipe (5) is provided with a thermometer (23), a circulation pipe (24) and a flow control valve (25) in sequence along the water flow direction; the end of the circulation pipe (24) is connected to the water inlet of the water inlet main pipe (11); and the circulation pipe (24) is provided with a circulation valve (26).

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