Steam generator

Abstract

The steam generator comprises a shell, a combustion rod, a metal combustion net, an igniter and a plurality of smoke tubes, a heating cavity is formed in the shell, a combustion chamber is arranged in the heating cavity, the combustion rod is arranged in the combustion chamber, the combustion rod is of an inner hollow structure with one through end, and a plurality of gas holes are evenly distributed in the side wall of the combustion rod. The metal combustion net is tubular, is arranged on the combustion rod in a sleeving mode and covers the gas hole, the multiple smoke pipes are all arranged in the heating cavity, the lower ends of the smoke pipes are all communicated with the combustion chamber, and the upper ends of the smoke pipes penetrate through the shell to extend to the outside. Flame generated by combustion is limited on the surface of the metal combustion net so that clear water in the heating cavity can be evenly heated, the heat utilization rate can be increased, meanwhile, smoke generated by combustion is exhausted through the smoke pipe, heat of the smoke is conducted to the clear water in the heating cavity through the pipe wall of the smoke pipe, and secondary recovery of the heat is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam generation, in particular to a steam generating device. Background Art

[0002] Steam generators are widely used in the food and clothing processing industries. Existing steam generators mainly heat water through heat energy to make the water evaporate into high-temperature steam, and then guide and utilize the steam. Generally, a steam generator mainly includes a water tank, a heating box built in the water tank, and a combustion rod sleeved in the heating box. Premixed gas flows into the combustion rod through the guidance of a gas pipe, and then flows out through the air holes on the combustion rod and is ignited. Its combustion reaction will increase the temperature of the heating box, and then heat the water in the water tank to make it evaporate and generate steam.

[0003] However, most of the waste gas generated by the combustion of existing steam generators is directly discharged through pipes, and the waste heat is not reasonably utilized. Moreover, the combustion rod lacks means to control the flame, resulting in the flame being prone to swing and uneven distribution, causing uneven heating of the heating box and affecting the heat utilization rate. Summary of the Utility Model

[0004] In view of this, the utility model provides a steam generator, which is used to solve the problems that most of the waste gas generated by the combustion of the existing steam generator is directly discharged through pipes, the waste heat is not reasonably utilized, and the combustion rod lacks means to control the flame, resulting in the flame being prone to swing and uneven distribution, causing uneven heating of the heating box and affecting the heat utilization rate.

[0005] To achieve one or part or all of the above purposes or other purposes, the utility model provides a steam generator, which includes a housing, a combustion rod, a metal combustion net, an igniter and a plurality of smoke pipes. A heating chamber is arranged in the housing, and an exhaust port communicating with the heating chamber is arranged at the upper end of the housing. A sealed combustion chamber is arranged in the heating chamber. The combustion rod is horizontally arranged in the combustion chamber. The combustion rod is a hollow structure with one end penetrated, and its penetrated end penetrates out of the combustion chamber and extends outside the housing. A plurality of gas holes are evenly distributed on the side wall of the combustion rod. The metal combustion net is tubular and sleeved on the combustion rod, covering the gas holes. The igniter is arranged adjacent to the metal combustion net in the combustion chamber. The plurality of smoke pipes are all arranged in the heating chamber and are distributed along the length direction of the combustion rod. The lower ends of the smoke pipes are all communicated with the combustion chamber, and the upper ends of the smoke pipes penetrate through the housing and extend to the outside.

[0006] Preferably, the smoke pipe is bent, and its upper end penetrates through a side wall at the upper end of the housing to the outside, and the plane where the center line of the smoke pipe is located is vertical.

[0007] Preferably, a plurality of the smoke pipes are alternately arranged at different heights along the length direction of the combustion rod, and the center lines of two adjacent smoke pipes do not coincide in the length direction of the combustion rod.

[0008] Preferably, a collecting box is provided on one side of the upper end of the housing. The upper ends of the smoke pipes all pass through the side wall of the housing and are communicated with the collecting box, and a discharge pipe is communicated with the outer side wall of the collecting box.

[0009] Preferably, the steam generator further includes a combustion box. The inner cavity of the combustion box is a combustion chamber. An installation opening is provided on one side wall of the housing. The combustion box is arranged in the heating cavity, and one end of it is nested outwardly in the installation opening. The through end of the combustion rod and the wiring end of the igniter both pass through the nested end of the combustion box to the outside, and a viewing window is further provided on the nested end of the combustion box.

[0010] Preferably, a water tank is provided on one side of the housing. A pressure equalizing pipe is communicated with the upper end of the water tank. One end of the pressure equalizing pipe away from the water tank is communicated with the upper end of the heating cavity. A water inlet pipe is communicated with the side wall of the water tank, and a water outlet pipe is communicated with the lower end of the water tank. One end of the water outlet pipe away from the water tank is communicated with the lower end of the heating cavity.

[0011] Preferably, a float valve is provided at the end where the water inlet pipe is connected to the water tank, and one end of the float valve connected with the floating ball is located inside the water tank.

[0012] Preferably, a liquid level detector is further provided inside the water tank.

[0013] Preferably, an exhaust pipe is communicated with the exhaust port, and an electronically controlled exhaust valve is provided on the exhaust pipe.

[0014] Preferably, a drain pipe communicating with the lower end of the heating cavity is provided at the lower end of the housing, and an electronically controlled drain valve is provided on the drain pipe.

[0015] Implementing the embodiments of the present invention will have the following beneficial effects:

[0016] After adopting the above steam generator, during use, the gas outlet end of the gas premixing device is communicated with the through end of the combustion rod. The premixed gas will be transported into the combustion rod and flow out through the gas holes to the inner side of the metal combustion net. The igniter will ignite this part of the gas, and the generated flame will be restricted on the surface of the metal combustion net without generating actual flames, thus avoiding the occurrence of flame swing and uneven distribution, so as to uniformly heat the metal combustion net, make the heat uniformly diffuse to the inner wall of the combustion chamber to heat the clear water in the heating cavity, improve the heat utilization rate. The steam generated after the clear water boils will be transported and utilized through the exhaust port and the corresponding pipelines. At the same time, the flue gas generated by combustion will be discharged through the smoke pipes. When the flue gas flows through the smoke pipes, its heat will be conducted through the pipe wall of the smoke pipes to the clear water in the heating cavity to realize secondary recovery of heat and make reasonable use of the waste heat of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Wherein:

[0019] Figure 1 is a perspective view of the present invention;

[0020] Figure 2 is an exploded view of the present invention;

[0021] Figure 3 is a side sectional view of the present invention.

[0022] In the figure: 1, housing; 11, heating chamber; 12, installation opening; 13, exhaust pipe; 14, drain pipe; 2, combustion rod; 21, gas holes; 3, metal combustion net; 4, igniter; 5, smoke pipe; 6, collection box; 61, discharge pipe; 7, combustion box; 71, combustion chamber; 72, viewing window; 8, water tank; 81, pressure equalizing pipe; 82, water inlet pipe; 83, float valve; 84, water outlet pipe; 85, liquid level detector; 91, electric control exhaust valve; 92, electric control drain valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above description of the drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present invention or the above drawings are used to distinguish different objects and not to describe a specific order.

[0024] Referring to "embodiments" herein means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0025] To enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

[0026] As Figures 1 - 3 shown, a steam generator includes a housing 1, a combustion rod 2, a metal combustion mesh 3, an igniter 4, and multiple smoke pipes 5. A heating chamber 11 is provided inside the housing 1. An exhaust port communicating with the heating chamber 11 is provided at the upper end of the housing 1. A sealed combustion chamber 71 is provided inside the heating chamber 11. The combustion rod 2 is horizontally arranged inside the combustion chamber 71. The combustion rod 2 has a hollow structure with one end penetrated, and its penetrated end penetrates out of the combustion chamber 71 and extends outside the housing 1. A plurality of gas holes 21 are evenly distributed on the side wall of the combustion rod 2. The metal combustion mesh 3 is made of a polymer material. The metal combustion mesh 3 is tubular and sleeved on the combustion rod 2, covering the gas holes 21. The igniter 4 is arranged adjacent to the metal combustion mesh 3 inside the combustion chamber 71. The multiple smoke pipes 5 are all arranged inside the heating chamber 11 and are distributed along the length direction of the combustion rod 2. The lower ends of the smoke pipes 5 are all communicated with the combustion chamber 71. The upper ends of the smoke pipes 5 penetrate through the housing 1 and extend to the outside. During use, the gas outlet end of the gas premixing device is communicated with the penetrated end of the combustion rod 2. The premixed gas will be transported into the combustion rod 2 and flow out through the gas holes 21 to the inner side of the metal combustion mesh 3. The igniter 4 will ignite this part of the gas, and the generated flame will be restricted on the surface of the metal combustion mesh 3 without generating actual flames, thereby avoiding the occurrence of flame swing and uneven distribution, so as to uniformly heat the metal combustion mesh 3, make the heat evenly diffuse to the inner wall of the combustion chamber 71 to heat the clear water in the heating chamber 11, improve the thermal utilization rate. The steam generated after the clear water boils will be transported and utilized through the exhaust port and the corresponding pipelines. At the same time, the flue gas generated by combustion will be discharged through the smoke pipes 5. While the flue gas flows through the smoke pipes 5, its heat will be conducted through the pipe wall of the smoke pipes 5 to the clear water in the heating chamber 11 to realize the secondary recovery of heat and make reasonable use of the waste heat of the flue gas. The polymer metal combustion mesh 3 can be obtained through market channels and will not be elaborated in this embodiment.

[0027] Specifically, the igniter 4 is an ignition needle.

[0028] Furthermore, the smoke pipe 5 is bent, and its upper end penetrates through one side wall at the upper end of the housing 1 to the outside. The plane where the center line of the smoke pipe 5 is located is vertical, so that the multiple smoke pipes 5 are arranged side by side, improving the space utilization rate of the heating chamber 11. At the same time, the bent smoke pipe 5 can increase its length inside the heating chamber 11, achieving the effects of prolonging the residence time of the flue gas in the heating chamber 11 and increasing the contact area between the smoke pipe 5 and the clear water in the heating chamber 11, and improving the recovery rate of the heat of the flue gas.

[0029] Further, multiple cigarette pipes 5 are alternately arranged at different heights along the length direction of the combustion rod 2, and the center lines of two adjacent cigarette pipes 5 do not coincide in the length direction of the combustion rod 2, so that the cigarette pipes 5 are more evenly distributed in the heating chamber 11, in order to uniformly heat the clear water in the heating chamber 11 and improve the heating efficiency.

[0030] Further, a collecting box 6 is provided on one side of the upper end of the housing 1. The upper ends of the cigarette pipes 5 all pass through the side wall of the housing 1 and are communicated with the collecting box 6. A discharge pipe 61 is communicated with the outer side wall of the collecting box 6. The flue gas flowing through the cigarette pipes 5 will converge in the collecting box 6 and is finally discharged centrally through the discharge pipe 61.

[0031] Further, the steam generator further includes a combustion box 7. The inner cavity of the combustion box 7 is a combustion chamber 71. An installation opening 12 is provided on one side wall of the housing 1. The combustion box 7 is arranged in the heating chamber 11, and one end of it is nested outward in the installation opening 12. The through end of the combustion rod 2 and the connection end of the igniter 4 both pass through the nested end of the combustion box 7 to the outside. A viewing window 72 is also provided on the nested end of the combustion box 7. The heat generated by the combustion of the gas will be conducted to the combustion box 7 and finally conducted to the clear water in the heating chamber 11 through the side wall of the combustion box 7. During assembly, the combustion box 7 can be inserted into the housing 1 through the installation opening 12, reducing the assembly difficulty of the two. At the same time, the user can view the combustion condition of the flame through the viewing window 72.

[0032] Further, a water tank 8 is provided on one side of the housing 1. The upper end of the water tank 8 is communicated with a pressure equalizing pipe 81. The end of the pressure equalizing pipe 81 far from the water tank 8 is communicated with the upper end of the heating chamber 11. A water inlet pipe 82 is communicated with the side wall of the water tank 8. The lower end of the water tank 8 is communicated with a water outlet pipe 84. The end of the water outlet pipe 84 far from the water tank 8 is communicated with the lower end of the heating chamber 11. The outside water source can supplement clear water into the water tank 8 through the water inlet pipe 82. When a part of the clear water in the heating chamber 11 is consumed, the clear water in the water tank 8 will flow into the heating chamber 11 through the water outlet pipe 84 under the action of gravity to ensure that there is always enough clear water in the heating chamber 11 for use and guarantee the orderly progress of production. At the same time, when the clear water in the heating chamber 11 is consumed and the clear water in the water tank 8 flows into the heating chamber 11 through the water outlet pipe 84, the air at the upper end of the water tank 8 and the air at the upper end of the heating chamber 11 will conduct adaptive exchange flow through the pressure equalizing pipe 81 to balance the air pressure in the heating chamber 11 and the water tank 8.

[0033] Further, a float valve 83 is provided at the end of the water inlet pipe 82 connected to the water tank 8. The end of the float valve 83 connected to the float ball is located in the water tank 8. When the water volume in the water tank 8 reaches the preset liquid level line, the float valve 83 will be closed under the lifting action of the float ball to stop adding water to the water tank 8 and limit the water volume in the water tank 8.

[0034] Further, a liquid level detector 85 is also provided in the water tank 8. The liquid level detector 85 is electrically connected to the water pump that pumps water into the water tank 8. When the water level in the water tank 8 drops to the lowest liquid level, the liquid level detector 85 will control the water pump to replenish clean water into the water tank 8 to cooperate with the float valve 83 to keep the clean water in the water tank 8 within a reasonable range of use.

[0035] Further, an exhaust pipe 13 is connected to the exhaust port. An electrically controlled exhaust valve 91 is provided on the exhaust pipe 13. The electrically controlled exhaust valve 91 can control the exhaust of the exhaust pipe 13 in real time according to actual production needs, achieving the purpose of flexible steam supply and improving the utilization rate of steam.

[0036] Further, a drain pipe 14 communicating with the lower end of the heating chamber 11 is provided at the lower end of the housing 1. An electrically controlled drain valve 92 is provided on the drain pipe 14. When the steam generator is idle for a long time or needs to be cleaned or repaired, the electrically controlled drain valve 92 can be controlled to conduct the drain pipe 14 to drain the clean water in the heating chamber 11 for easy operation.

[0037] Obviously, the embodiments described above are only a part of the embodiments of the present invention, rather than all of them. The accompanying drawings show the preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements for some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present invention in other related technical fields is equally within the scope of the patent protection of the present invention.

Claims

1. A steam generator, characterized in that: include: A shell, a combustion rod, a metal combustion mesh, an igniter and a plurality of smoke tubes; A heating chamber is provided in the shell, an exhaust port connected to the heating chamber is provided at the upper end of the shell, and a closed combustion chamber is provided in the heating chamber; The combustion rod is horizontally arranged in the combustion chamber, and is a hollow structure with one end penetrated, and the through end passes through the combustion chamber and extends outside the shell, and a plurality of gas holes are evenly distributed on the side wall of the combustion rod; The metal combustion net is tubular and is sleeved on the combustion rod to cover the gas hole; The igniter is arranged in the combustion chamber adjacent to the metal combustion net; A plurality of the smoke pipes are arranged in the heating cavity and distributed along the length direction of the combustion rod. The lower ends of the smoke pipes are connected to the combustion chamber, and the upper ends of the smoke pipes extend through the shell to the outside.

2. A steam generator according to claim 1, characterized in that: The smoke pipe is bent, and its upper end passes through a side wall of the upper end of the shell to the outside, and the plane where the center line of the smoke pipe is located is vertical.

3. A steam generator according to claim 2, characterized in that: The plurality of smoke tubes are alternately arranged one high and one low along the length direction of the burning rod, and the center lines of two adjacent smoke tubes do not overlap in the length direction of the burning rod.

4. A steam generator according to claim 1, characterized in that: A collecting box is provided on one side of the upper end of the shell, and the upper ends of the smoke pipes are connected to the collecting box through the side wall of the shell, and the outer side wall of the collecting box is connected to a discharge pipe.

5. The steam generator according to claim 1, characterized in that: The steam generator also includes a combustion box, the inner cavity of the combustion box is a combustion chamber, a mounting opening is provided on one side wall of the shell, the combustion box is arranged in the heating chamber, and one end thereof is nested in the mounting opening facing outward, the through end of the combustion rod and the connection end of the igniter both pass through the nested end of the combustion box to the outside, and a fire viewing window is also provided on the nested end of the combustion box.

6. A steam generator according to claim 1, characterized in that: A water tank is provided on one side of the shell, the upper end of the water tank is connected to a equalizing pipe, the end of the equalizing pipe away from the water tank is connected to the upper end of the heating chamber, the side wall of the water tank is connected to a water inlet pipe, the lower end of the water tank is connected to a water outlet pipe, the end of the water outlet pipe away from the water tank is connected to the lower end of the heating chamber.

7. A steam generator according to claim 6, characterized in that: A float valve is arranged at one end of the water inlet pipe connected to the water tank, and one end of the float valve connected to the float ball is located in the water tank.

8. A steam generator according to claim 6, characterized in that: A liquid level detector is also arranged in the water tank.

9. A steam generator according to claim 1, characterized in that: The exhaust port is connected to an exhaust pipe, and the exhaust pipe is provided with an electrically controlled exhaust valve.

10. A steam generator according to claim 6, characterized in that: The lower end of the shell is provided with a drainage pipe communicating with the lower end of the heating chamber, and the drainage pipe is provided with an electric-controlled drainage valve.

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