Silent and energy-saving steam generator

Abstract

The utility model discloses a silent energy-saving steam generator which comprises a steam cabinet, the steam cabinet is composed of a steam chamber on the upper portion and a drawer type combustion chamber on the lower portion, a water container is arranged in the steam chamber, a combustion cavity is arranged on the lower portion of the water container, a fire tube assembly is arranged in the steam chamber, a heating opening is formed in the bottom of the water container, and the drawer type combustion chamber is arranged on the lower portion of the water container. The heating opening is communicated with the interior of the combustion cavity, the liquid fuel combustion device is erected on the drawer frame, and a circle of heat insulation plate is arranged at a fire outlet of the liquid fuel combustion device. Compared with the prior art, the combustion cavity is designed in the water container, heat energy generated by liquid fuel is directly sprayed into the combustion cavity to heat a water body, the heat energy utilization rate is greatly improved through the fire tube assembly, the drawer type combustion chamber is adopted, maintenance and use can be achieved through push and pull, and the heat insulation effect is achieved through the heat insulation plate. Butt joint of the liquid fuel combustion device and the bottom of the water container is achieved, heat loss is reduced, and waste heat utilization of flue gas tail gas can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of steam generators, in particular to a silent and energy-saving steam generator. Background Art

[0002] Steam generator cabinets are heat source equipment in large commercial kitchens. They generate high-temperature steam and serve as a heating source for cooking equipment. Steam generator cabinets centrally generate high-temperature steam, which is then transported to the required cooking equipment using steam pipes to provide the required high-temperature steam for the cooking equipment. Traditional steam generator cabinets use natural gas as raw material to heat the tube array, evaporating the water in the tube tray to generate steam. Since natural gas combustion requires oxygen, this method can only heat the tube array from the outside through flames. The fuel heat conversion efficiency is not high, the heat loss is large, and the steam generated is less efficient. In addition, liquefied natural gas tanks have certain safety issues. Currently, many places have banned the commercial use of liquefied natural gas.

[0003] Liquid fuel is the best choice to replace the existing natural gas liquefied fuel. However, the current application of liquid fuel in commercial stoves is mainly used in kitchen stoves, such as the common electric fuel injection stoves. The principle of its combustion device is to use a pulse oil pump with an atomizing nozzle to spray liquid fuel at high speed, and then atomize it to reach the liquid fuel vaporization and combustion standard. Only then can the liquid fuel be ignited and burned to generate heat. The current electric fuel injection stove must first pressurize the liquid fuel to 12 kg pressure to ensure that the liquid fuel sprayed from the atomizing nozzle is in a mist form and can be mixed with the air injected by the fan to burn. Since high pressure is required to ensure atomization, the flame is sprayed at high speed, and it is impossible to design a furnace basin for the tube row to burn like a stove. If the tube row is heated, the high-temperature airflow will quickly flow through the tube row, and the heat utilization rate is extremely low. In addition, the high-speed airflow will cause great damage to the tube row and make a lot of noise. Therefore, liquid fuel cannot be used on steam generators.

[0004] Our company has developed the first generation of liquid fuel stoves, see CN202410224133.0 A multi-stage energy-saving combustion device for liquid fuel. This device essentially changes the atomization combustion mode of the original electric fuel injection stove through the structural design of the ion combustion body, and changes the original open combustion mode of the electric fuel injection stove into a closed multi-stage combustion mode. It does not need to be atomized by a high-pressure atomizing nozzle, but only uses the temperature generated by the primary combustion of the first-stage combustion chamber in the ion combustion body, combined with the air intake of the cyclone air intake cylinder, to achieve true high-temperature vaporization of the liquid fuel. Its combustion mode is no longer to directly heat the pot through flames, but to heat the fuel through thermal radiation after full combustion. Compared with direct flame heating, the heating effect is better, the heat utilization rate is greatly improved, and the heat energy loss is greatly reduced. Compared with the electric fuel injection stove, the heat utilization rate is nearly doubled, and the energy consumption such as oil and electricity is only half of the original, and it is safer, more independent, and more applicable, which provides possibilities for liquid fuel in the field of steam generators. However, there are currently no corresponding steam generator products on the market. Due to changes in the combustion device and its combustion method, a completely new structural design of the steam generator is urgently needed. Summary of the invention

[0005] The utility model aims to provide a steam generator which uses liquid fuel as fuel, has high heat utilization rate, is silent and energy-saving.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a silent and energy-saving steam generator, including a steam cabinet, the steam cabinet consists of an upper steam chamber and a lower drawer-type combustion chamber, the steam chamber is provided with a water bladder, the lower part of the water bladder is provided with a combustion chamber, the upper part of the water bladder is an evaporation chamber, the top of the water bladder is provided with a smoke exhaust port, the evaporation chamber is provided with a fire tube assembly, the smoke exhaust port is connected with the combustion chamber through the fire tube assembly, the bottom of the water bladder is provided with a heating port, the heating port is connected with the inside of the combustion chamber, the drawer-type combustion chamber consists of a drawer frame, a drawer panel and a liquid fuel combustion device, the liquid fuel combustion device is mounted on the drawer frame, a circle of heat insulation board is provided at the fire outlet of the liquid fuel combustion device, the heat insulation board is located between the drawer frame and the heating port of the water bladder, and is fixed on the drawer frame.

[0007] Preferably, the fire tube assembly is composed of multiple groups of square plate-shaped fire tubes, which are arranged side by side, and multiple smoke inlet joints are provided at the bottom of the plate-shaped fire tubes, and smoke outlet joints are provided at the top of the plate-shaped fire tubes.

[0008] Preferably, a smoke inlet port matching the fire tube assembly is provided at the top of the combustion chamber, and each smoke inlet joint of the fire tube assembly is fixedly connected to the smoke inlet port.

[0009] Preferably, a smoke collecting plate is provided on the smoke exhaust port of the water bladder, the smoke collecting plate is welded and sealed to the water bladder on all sides, a smoke outlet matching the fire tube assembly is opened on the bottom surface of the smoke collecting plate, and each smoke outlet joint of the fire tube assembly is fixedly connected to the smoke outlet.

[0010] Preferably, a steam reheat pipe and a steam output pipe are provided on the top of the water tank, a superheat box is provided on the smoke exhaust port of the water tank, a multi-stage heat exchanger with fins is provided in the superheat box, the steam inlet of the multi-stage heat exchanger is connected with the evaporation chamber of the water tank through the steam reheat pipe, the superheated steam outlet of the multi-stage heat exchanger is connected with the steam output pipe, a strong exhaust fan is provided on the top of the superheat box, and the bottom of the superheat box is connected with the inside of the fire tube assembly through the smoke exhaust port.

[0011] Preferably, the water tank is provided with an automatic water replenishment tank, and the automatic water replenishment tank is connected with the interior of the water tank through a water replenishment pipe.

[0012] Preferably, a liquid level glass tube and a fire viewing tube are provided on the water tank, the liquid level glass tube is connected to the steam chamber, and the fire viewing tube is connected to the combustion chamber.

[0013] Preferably, a cabinet door is provided on the front of the steam chamber, and a window for observing the liquid level and flame is provided on the cabinet door.

[0014] Preferably, a pressure detection tube with a pressure relief valve is provided on the top of the water bladder.

[0015] Preferably, the liquid fuel combustion device consists of an ion combustion body and a silencer combustion tube, the lower end of the silencer combustion tube is fixed on the fire outlet of the ion combustion body, and a ceramic silencer tube is arranged in the silencer combustion tube, and the ceramic silencer tube is made of porous ceramic.

[0016] Preferably, a control box, a switching power supply, a fan and an oil pump are further provided on the drawer frame of the drawer-type combustion chamber. A control panel is provided on the front of the drawer panel. The control box is electrically connected to the fan, the oil pump and the control panel, respectively. The fan is connected to the interior of the ion combustion body to provide it with combustion-supporting air. The oil pump is connected to the interior of the ion combustion body through an oil supply pipe to pump liquid fuel into the ion combustion body for vaporization and combustion. The switching power supply supplies power to the control box, the fan and the oil pump. The user can output switching instructions through the control panel and control the switching of the fan and the oil pump through the control box.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] 1. The utility model improves the structure of the steam cabinet and designs a combustion chamber in the water tank. The heat energy generated by the liquid fuel is directly sprayed into the combustion chamber to heat the water body, which greatly improves the thermal energy utilization rate and reduces the supply of liquid fuel. The generated hot gas further heats the water body in the water tank through the fire tube assembly to generate steam, and the exhaust gas after heat exchange is discharged from the exhaust port.

[0019] 2. It is convenient for the installation and maintenance of the liquid fuel combustion device. The combustion chamber adopts a drawer-type combustion chamber. The combustion chamber can be pushed and pulled as a whole by pushing and pulling. When pulled out, it is convenient to repair the liquid fuel combustion device. When pushed in, the liquid fuel combustion device is directly opposite to the heating port at the bottom of the water tank for heating work.

[0020] 3. A heat insulation board is designed to achieve the connection between the fire outlet of the liquid fuel combustion device and the heating port at the bottom of the water tank, reducing heat loss.

[0021] 4. In order to realize the waste heat utilization of flue gas, a superheater is provided on the smoke exhaust port of the water tank. The steam generated by the water tank is reheated by the superheater to form superheated steam, realizing the waste heat utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the utility model after the left side plate is removed;

[0024] Figure 3 This is a schematic diagram of the structure of the utility model after the right side panel and the cabinet door are removed;

[0025] Figure 4 This is a schematic diagram of the internal structure of the water bladder of the utility model;

[0026] Figure 5 This is a schematic diagram of the bottom structure of the water bladder of the utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the fire tube assembly of the utility model;

[0028] Figure 7 It is a structural schematic diagram of the liquid fuel combustion device of the utility model.

[0029] In the figure: 1. steam chamber; 2. drawer-type combustion chamber; 201. drawer frame; 202. drawer panel; 3. water liner; 4. fire tube assembly; 41. plate-shaped fire tube; 42. flue gas inlet joint; 43. flue gas outlet joint; 5. combustion chamber; 6. heating port; 7. liquid fuel combustion device; 8. heat insulation board; 9. superheat box; 10. multi-stage heat exchanger; 11. strong exhaust fan; 12. pressure detection tube; 13. cabinet door; 14. window; 15. control panel; 16. control box; 17. oil pump; 18. fan; 19. switch power supply; 20. steam reheat pipe; 21. automatic water replenishment tank; 22. liquid level glass tube; 23. fire observation tube; 24. smoke collecting plate; 25. steam output pipe; 26. ion combustion body; 27. silencer combustion tube; 28. ceramic silencer tube. DETAILED DESCRIPTION

[0030] The utility model will be further described below, specifically as follows: a silent and energy-saving steam generator, see Figures 1 to 6 , including a steam cabinet, which consists of a steam chamber 1 at the top and a drawer-type combustion chamber 2 at the bottom. A water bladder 3 is arranged in the steam chamber 1, and a combustion chamber 5 is arranged at the bottom of the water bladder 3. The upper part of the water bladder 3 is an evaporation chamber, and a smoke exhaust port is arranged at the top of the water bladder 3. A fire tube assembly 4 is arranged in the evaporation chamber, and the smoke exhaust port is connected with the combustion chamber 5 through the fire tube assembly 4. A heating port 6 is arranged at the bottom of the water bladder 3, and the heating port 6 is connected with the inside of the combustion chamber 5. The drawer-type combustion chamber 2 consists of a drawer frame 201, a drawer panel 202 and a liquid fuel combustion device 7. The liquid fuel combustion device 7 is mounted on the drawer frame 201. A circle of heat insulation board 8 is arranged at the fire outlet of the liquid fuel combustion device 7, and the heat insulation board 8 is located between the drawer frame 201 and the heating port 6 of the water bladder 3, and is fixed on the drawer frame 201. In order to facilitate the heating and combustion of the liquid fuel combustion device 7, the utility model improves the structure of the steam cabinet, designs a combustion chamber 5 in the water tank 3, and the heat energy generated by the liquid fuel is directly sprayed into the combustion chamber 5 to heat the water body, which greatly improves the thermal energy utilization rate and reduces the supply of liquid fuel. The generated hot gas further heats the water body in the water tank 3 through the fire tube assembly 4 to generate steam, and the exhaust gas after heat exchange is discharged from the smoke exhaust port. In order to facilitate the installation and maintenance of the liquid fuel combustion device 7, the combustion chamber adopts a drawer-type combustion chamber 2, which can be pushed and pulled as a whole by pushing and pulling. When pulled out, it is convenient to inspect the liquid fuel combustion device 7. When pushed in, the liquid fuel combustion device 7 is directly opposite to the heating port 6 at the bottom of the water tank 3 for heating work, and a heat insulation board 8 is designed to achieve the docking of the fire outlet of the liquid fuel combustion device 7 with the heating port 6 at the bottom of the water tank 3 to reduce heat loss.

[0031] In order to improve the heat exchange effect between the high-temperature flue gas and the water body in the water tank 3 and increase the steam generation amount, the fire tube assembly 4 is composed of a plurality of groups of square plate-shaped fire tubes 41. The square plate-shaped fire tubes 41 have a large structural area, which is more conducive to the high-temperature flue gas heating the water body. The plurality of groups of plate-shaped fire tubes 41 are arranged side by side, and the plurality of groups of plate-shaped fire tubes 41 are parallel to improve the heating efficiency. A plurality of flue gas inlet joints 42 are provided at the bottom of the plate-shaped fire tube 41 to facilitate the intake of high-temperature flue gas. A flue gas outlet joint 43 is provided at the top of the plate-shaped fire tube 41 to facilitate the exhaust of high-temperature flue gas after heat exchange. The design of the plate-shaped fire tube 41 can also reduce the influence of wind speed on the fire tube assembly 4 and improve the service life of the fire tube assembly 4.

[0032] A smoke inlet matching the fire tube assembly 4 is provided at the top of the combustion chamber 5, and each smoke inlet joint 42 of the fire tube assembly 4 is fixedly connected to the smoke inlet. Due to the structural arrangement of the plate-like fire tube 41, the smoke inlet is distributed in an array at the top of the combustion chamber 5, so that the top of the combustion chamber 5 can be evenly inlet with air, which is evenly distributed in the plate-like fire tube 41, thereby enabling better heat exchange.

[0033] A smoke collecting plate 24 is provided on the smoke exhaust port of the water bladder 3. The smoke collecting plate 24 is welded and sealed with the water bladder 3 on all sides. A smoke outlet matching the fire tube assembly 4 is provided on the bottom surface of the smoke collecting plate 24. Each smoke outlet joint 43 of the fire tube assembly 4 is fixedly connected to the smoke outlet. Through the designed smoke collecting plate 24, each group of plate-shaped fire tubes 41 can be connected together, and exhaust is uniformly discharged from the smoke exhaust port.

[0034] After the high-temperature flue gas has been heat-exchanged by the water liner 3, it still has a relatively high temperature. In order to utilize the remaining heat, a superheater 9 is provided on the exhaust port of the water liner 3. The steam generated by the water liner 3 is reheated by the superheater 9 to form superheated steam. The remaining heat can be utilized and can be transported to other equipment through the steam output pipe 25 for steam supply. A steam reheating pipe 20 and a steam output pipe 25 are provided on the top of the water liner 3. A multi-stage heat exchanger 10 with fins is provided in the superheater 9. The steam reheating pipe 20 transports the steam generated by the water liner 3 to the multi-stage heat exchanger 10, and the steam is reheated by the multi-stage heat exchanger 10. Then, the steam is output from the steam output pipe 25. 25 outputs the steam inlet of the multi-stage heat exchanger 10 connected to the evaporation chamber of the water tank 3 through the steam reheat pipe 20, and the superheated steam outlet of the multi-stage heat exchanger 10 is connected to the steam output pipe 25. A strong exhaust fan 1811 is provided on the top of the superheat box 9. The strong exhaust fan 1811 performs strong exhaust ventilation to discharge the flue gas and tail gas to the outside. The bottom of the superheat box 9 is connected to the inside of the fire tube assembly 4 through the smoke exhaust port. The high-temperature flue gas after heat exchange enters the superheat box 9 through the smoke exhaust port, heats the steam in the multi-stage heat exchanger 10 to form superheated steam, realizes waste heat utilization, and the tail gas after heat exchange is discharged through the strong exhaust fan 1811.

[0035] The water tank 3 is provided with an automatic water replenishment tank 21, which is connected to the inside of the water tank 3 through a water replenishment pipe. The automatic water replenishment tank 21 is equipped with a float valve. When the water in the water tank 3 is lower than a certain water level due to evaporation, the water tank 3 is replenished through the water replenishment pipe to prevent the water tank 3 from drying out.

[0036] The water liner 3 is provided with a liquid level glass tube 22 and a fire observation tube 23, the front of the steam chamber 1 is provided with a cabinet door 13, the opening position of the window 14 corresponds to the liquid level glass tube 22 and the fire observation tube 23, the liquid level glass tube 22 is connected to the steam chamber 1, the water level in the water liner 3 can be manually observed through the liquid level glass tube 22, the fire observation tube 23 is connected to the combustion chamber 5, the combustion condition of the liquid fuel combustion device 7 in the combustion chamber 5 can be directly observed through the fire observation tube 23. The cabinet door 13 is provided with a window 14 for conveniently observing the liquid level and flame. The top of the water liner 3 is provided with a pressure detection tube 12 with a pressure relief valve.

[0037] The drawer frame 201 of the drawer-type combustion chamber 2 is also provided with a control box 16, a switching power supply 19, a fan 18 and an oil pump 17. A control panel 15 is provided on the front of the drawer panel 202. The control box 16 is electrically connected to the fan 18, the oil pump 17 and the control panel 15 respectively. The fan 18 is connected to the inside of the ion combustion body to provide it with combustion-supporting air. The oil pump 17 is connected to the inside of the ion combustion body through an oil supply pipe to inject liquid fuel into the ion combustion body for vaporization and combustion. The switching power supply 19 supplies power to the control box 16, the fan 18 and the oil pump 17. The user can output switching instructions through the control panel 15 and control the switching of the fan 18 and the oil pump 17 through the control box 16.

[0038] As a preferred solution, the liquid fuel combustion device 7 adopts the second-generation combustion device stove developed by our company, see CN202410633760X, a multi-stage silent and energy-saving combustion device for liquid fuel, the multi-stage liquid fuel combustion device 7 is composed of an ion combustion body 26 and a silencer combustion tube 27, the lower end of the silencer combustion tube 27 is fixed on the fire outlet of the ion combustion body 26, and a ceramic silencer tube 28 is arranged in the silencer combustion tube 27. The ceramic silencer tube 28 adopts porous ceramics. The added ceramic silencer tube 28 can play the role of silencing and reducing noise, and at the same time has a heat gathering effect, which can ensure that the liquid fuel is fully burned. The porous mullite ceramic has the characteristics of high porosity, low density, high temperature resistance and high mechanical strength, and its porous breathable structure has a good sound absorbing and noise reduction effect. The liquid fuel is first vaporized and burned through the ion combustion body 26, and then oxygen-enriched and fully fueled in the silencer combustion tube 27. Finally, the heat energy generated by the combustion is sprayed into the combustion chamber 5 through the silencer combustion tube 27, and the water tank 3 is heated from the inside through the fire tube assembly 4. Since this technology does not require high-pressure oil supply, the gas circulation is slow, the fuel burns fully, and closed combustion is adopted to generate high-temperature heat energy to heat the water tank 3, the heat utilization rate is extremely high, and it is easy to cause wind wear to the fire tube assembly 4.

[0039] The above is a detailed introduction to a silent and energy-saving steam generator provided by the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model; at the same time, for general technical personnel in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope, and changes and improvements to the utility model will be possible without exceeding the concept and scope specified in the attached claims. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A silent and energy-saving steam generator, characterized in that: The invention comprises a steam cabinet, which is composed of a steam chamber at an upper part and a drawer-type combustion chamber at a lower part. A water bladder is arranged in the steam chamber, a combustion chamber is arranged at the lower part of the water bladder, an evaporation chamber is arranged at the upper part of the water bladder, a smoke exhaust port is arranged at the top of the water bladder, a fire tube assembly is arranged in the evaporation chamber, the smoke exhaust port is connected with the combustion chamber through the fire tube assembly, a heating port is arranged at the bottom of the water bladder, the heating port is connected with the inside of the combustion chamber, the drawer-type combustion chamber is composed of a drawer frame, a drawer panel and a liquid fuel combustion device, the liquid fuel combustion device is mounted on the drawer frame, a circle of heat insulation board is arranged at the fire outlet of the liquid fuel combustion device, the heat insulation board is located between the drawer frame and the heating port of the water bladder, and is fixed on the drawer frame.

2. A silent and energy-saving steam generator according to claim 1, characterized in that: The fire tube assembly is composed of multiple groups of square plate-shaped fire tubes, which are arranged side by side. The bottom of the plate-shaped fire tube is provided with multiple smoke inlet joints, and the top of the plate-shaped fire tube is provided with a smoke outlet joint.

3. A silent and energy-saving steam generator according to claim 2, characterized in that: A smoke inlet port matching the fire tube assembly is provided on the top of the combustion chamber, and each smoke inlet joint of the fire tube assembly is fixedly connected to the smoke inlet port.

4. A silent and energy-saving steam generator according to claim 2, characterized in that: A smoke collecting plate is arranged on the smoke outlet of the water bladder, and the smoke collecting plate is welded and sealed with the water bladder on all sides. A smoke outlet matching the fire tube assembly is opened on the bottom of the smoke collecting plate, and each smoke outlet joint of the fire tube assembly is fixedly connected to the smoke outlet.

5. The silent and energy-saving steam generator according to claim 1, characterized in that: A steam reheat pipe and a steam output pipe are provided on the top of the water liner, a superheat box is provided on the smoke exhaust port of the water liner, a multi-stage heat exchanger with fins is provided in the superheat box, the steam inlet of the multi-stage heat exchanger is connected with the evaporation chamber of the water liner through the steam reheat pipe, the superheated steam outlet of the multi-stage heat exchanger is connected with the steam output pipe, a strong exhaust fan is provided on the top of the superheat box, and the bottom of the superheat box is connected with the inside of the fire tube assembly through the smoke exhaust port.

6. The silent and energy-saving steam generator according to claim 1, characterized in that: An automatic water replenishing tank is arranged on the water container, and the automatic water replenishing tank is communicated with the interior of the water container through a water replenishing pipe.

7. The silent and energy-saving steam generator according to claim 1, characterized in that: A liquid level glass tube and a fire observation tube are arranged on the water bladder. The liquid level glass tube is communicated with the steam chamber, and the fire observation tube is communicated with the combustion chamber.

8. The silent and energy-saving steam generator according to claim 1, characterized in that: A cabinet door is arranged on the front of the steam chamber, and a window for observing the liquid level and the flame is opened on the cabinet door.

9. The silent and energy-saving steam generator according to claim 1, characterized in that: A pressure detection tube with a pressure relief valve is arranged on the top of the water bladder.

10. The silent and energy-saving steam generator according to claim 1, characterized in that: The liquid fuel combustion device consists of an ion combustion body and a silencer combustion tube. The lower end of the silencer combustion tube is fixed on the fire outlet of the ion combustion body. A ceramic silencer tube is arranged in the silencer combustion tube. The ceramic silencer tube adopts porous ceramics.

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