Submerged combustion furnace

Abstract

The present invention relates to a submerged liquid combustion furnace, comprising a water tank provided with a water inlet and a water outlet, a drum located in the water tank, and a driving device for driving the drum to rotate, wherein a steam exhaust hole is provided on the water tank; a plurality of gas-liquid holes are provided on the side wall of the drum, a main shaft coaxial with the drum is fixedly connected to the sealed end of the drum, and one end of the main shaft extending out of the water tank is drivingly connected to the output shaft of the driving device; a support cylinder is sleeved on the outer circumferential surface of the open end of the drum, and the support cylinder is sealingly and rotatably connected to the drum, and one end of the sealing cylinder extending out of the water tank is fixedly connected to a connecting plate, and a combustion device opposite to the inner cavity of the drum is installed on the connecting plate. The present invention forms a space where flames can exist in the drum by the rotation of the drum and the action of centrifugal force, and the flame and the gas heated by the flame are in direct contact with water, which greatly improves the heating efficiency and heat utilization rate; it can be used for heating and evaporating various non-flammable liquids, and the fuel can be various gas, oil, and solid fuel, and has high versatility.

Description

Technical Field

[0001] The invention relates to the technical field of heating, in particular to the heating of non-flammable liquids, and specifically refers to a submerged liquid combustion furnace. Background Art

[0002] Heating water is a common way for people to use water. Currently, water heating mainly includes flame heating and electric heating. During flame heating, the container containing water is heated by the flame, and the heat is transferred to the water in the container by the container; during electric heating, the water is heated by an electric heating wire placed in the water. Both heating methods have the problem of low heating efficiency, and electric heating consumes a lot of electricity, has high requirements for accessories such as wires, and there is a risk of leakage. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a submerged liquid combustion furnace, in which a flame is arranged in a water tank and water is heated from the inside by the flame, thereby greatly improving the heating efficiency and avoiding the occupation of a large amount of electric energy.

[0004] The present invention is achieved through the following technical scheme, which provides a submerged liquid combustion furnace, including a water tank provided with a water inlet and a water outlet, a drum located in the water tank, and a driving device for driving the drum to rotate, wherein the water tank is provided with a steam exhaust hole located above the liquid level in the water tank; a plurality of gas-liquid holes are provided on the side wall of the drum, one end of the drum is sealed, and the other end is open, and a main shaft coaxial with the drum is fixedly connected to the sealed end of the drum, and one end of the main shaft extending out of the water tank is drivingly connected to the output shaft of the driving device; a supporting cylinder is sleeved on the outer cylindrical surface of the open end of the drum, the supporting cylinder and the drum are sealingly rotatably connected, the supporting cylinder is sealingly fixed to the water tank, one end of the sealing cylinder extending out of the water tank is fixedly connected to a connecting plate, and a combustion device opposite to the inner cavity of the drum is installed on the connecting plate.

[0005] When the present solution is in use, the driving device drives the drum to rotate, and the water in the drum is thrown out through the gas-liquid hole by the action of centrifugal force. The flame generated by the combustion device heats the gas in the drum. The heated gas is also thrown out through the gas-liquid hole under the action of centrifugal force, thereby contacting and exchanging heat with the water in the water tank. The steam exhaust hole is provided to ensure the pressure safety in the water tank. The heated gas contacts the water more fully, and when the drum rotates, the water in the water tank is agitated, thereby further improving the heating efficiency. The sealing arrangement between the drum and the support tube prevents the water in the water tank from entering the support tube, and a sealed bearing can be used between the support tube and the drum to achieve a sealed rotating connection.

[0006] As an optimization, the combustion device includes an air inlet pipe, a gas inlet pipe and an igniter which are passed through the connecting plate. The outlet ends of the air inlet pipe and the gas inlet pipe face the inner cavity of the drum, and the ignition end position of the igniter is adapted to the outlet ends of the air inlet pipe and the gas inlet pipe. The combustion device of this optimization scheme introduces gas through the gas inlet pipe, introduces air through the air inlet pipe, provides oxygen required for combustion, and uses the igniter to ignite the gas, so that the flame and high-temperature smoke heat the air in the inner cavity of the drum. The structure is simple and easy to use.

[0007] As an optimization, it also includes a flame hood with one end fixed to the connecting plate and the other end extending to the inner cavity of the drum through the open end. A gas diffusion net and a mixing net are fixed in sequence in the flame hood along the direction of gas introduction. The side wall of the flame hood is provided with a number of smoke outlets located on the side of the mixing net away from the gas diffusion net; the gas outlet end of the gas inlet pipe is passed between the gas diffusion net and the mixing net, and the gas outlet end of the air inlet pipe and the gas outlet end of the gas inlet pipe are respectively located on both sides of the gas diffusion net. This optimization scheme increases the axial length of the flame by setting up the flame hood, and the flame or heated gas is dispersed through the smoke outlet, which improves the uniformity of hot gas distribution, thereby improving the uniformity of water heating; by setting up the gas diffusion net, the air introduced through the air inlet pipe passes through the gas diffusion net and combines with the gas, and the gas diffusion net is used to disperse the passing air, thereby improving the sufficiency of combining with the gas; by setting up the mixing net, the sufficiency of mixing of gas and air is further improved, thereby making the combustion more complete.

[0008] As an optimization, the combustion device includes a flame tube, a fuel inlet pipe and an igniter which are penetrated on the connecting plate. The front end of the flame tube faces the inner cavity of the drum, and the rear end of the flame tube is provided with an end plate through which the gas inlet pipe and the air inlet pipe are penetrated. A gas dispersion network and a mixing network are fixed in sequence in the flame tube along the gas introduction direction. The gas outlet end of the gas inlet pipe is penetrated between the gas dispersion network and the mixing network, and the gas outlet end of the air inlet pipe and the gas outlet end of the gas inlet pipe are respectively located on both sides of the gas dispersion network; a fuel gasification coil is provided at the oil outlet end of the fuel inlet pipe, and the oil and gas outlet of the fuel gasification coil corresponds to the gas outlet end of the gas inlet pipe; the ignition end of the igniter is located on the front side of the flame tube. This optimization scheme provides a mixing space for gas, air and oil and gas by setting up a flame tube to form a fuel gas mixed burner; by setting up an air dispersion network, the air introduced through the air inlet pipe passes through the air dispersion network and combines with the gas, and the air dispersion network is used to disperse the passing air, thereby improving the completeness of the combination with the gas; by setting up a mixing network, the completeness of the mixing of gas, oil and gas and air is further improved, thereby making the combustion more complete.

[0009] As an optimization, the combustion device includes a flame tube, a fuel inlet pipe and an igniter which are passed through the connecting plate. The front end of the flame tube faces the inner cavity of the drum, and the rear end of the flame tube is provided with an end plate through which a gas inlet pipe and an air inlet pipe are passed. A gas diffuser net, a first mixing net and a second mixing net are fixed in the flame tube in sequence along the direction of gas introduction. The gas outlet end of the gas inlet pipe is passed between the gas diffuser net and the first mixing net, and the gas outlet end of the air inlet pipe and the gas outlet end of the gas inlet pipe are respectively located on both sides of the gas diffuser net; the oil outlet end of the fuel inlet pipe is provided with a fuel gasification coil The oil and gas outlet of the fuel gasification coil is located between the first mixing network and the second mixing network, and faces the second mixing network; the ignition end of the igniter is located at the front side of the flame tube; the inner side surface of the connecting plate is also fixedly connected to a sealing cylinder located at the periphery of the flame tube, and the front end of the sealing cylinder is fixedly provided with a sealing plate extending to the wall of the flame tube, and a buffer air cavity is formed between the connecting plate, the sealing cylinder, the sealing plate and the flame tube, and an auxiliary air hole connecting the buffer air cavity and the inner cavity of the flame tube is opened on the wall of the flame tube, and an auxiliary air inlet pipe connected to the buffer air cavity is passed through the connecting plate. This optimization scheme sets the fuel gasification coil at the front of the flame tube to form a fuel and gas two-stage burner. When burning fuel, air enters the buffer air cavity through the auxiliary air inlet pipe and enters the flame tube through the auxiliary air holes to provide the required oxygen for the combustion of oil and gas; when burning gas, the air inlet pipe provides the required oxygen for combustion; by setting up a gas dispersion network, the air introduced through the air inlet pipe passes through the gas dispersion network and then combines with the gas, and the gas dispersion network is used to disperse the passing air, thereby improving the completeness of the combination with the gas; by setting up a first mixing network, the completeness of the mixing of gas and air is further improved, and by setting up a second mixing network, the oil and gas are fully mixed with the air, thereby making the combustion more complete.

[0010] As an optimization, a drainage hole is provided on the connecting plate, and the position of the drainage hole is lower than the inner cavity of the drum in the vertical direction. This optimization scheme facilitates the drainage of water flowing into the support cylinder by providing a drainage hole. At the same time, it can also be judged whether there is still water in the drum by whether there is water discharged from the drainage hole, so as to control the ignition timing.

[0011] As an optimization, a plurality of water-displacing teeth are fixed on the outer side of the drum and are distributed at intervals along the circumferential direction. A water-displacing groove is formed between adjacent water-displacing teeth. The gas-liquid hole is located in the water-displacing teeth and penetrates the water-displacing teeth in the radial direction. This optimization scheme improves the stirring effect of the heated water in the water tank by arranging water-displacing teeth on the drum, and further improves the heating efficiency.

[0012] As an optimization, the exhaust hole is connected to the steam inlet of the evaporator, and the water inlet of the water tank is connected to the hot water outlet of the evaporator. The setting of this optimization scheme enables the steam flowing out of the water tank to be further utilized, thereby improving the heat utilization rate.

[0013] As an optimization, the water inlet of the water tank is fixedly connected with a water inlet pipe extending into the water tank, and a plurality of water distribution holes are opened on the wall of the water inlet pipe. This optimization scheme increases the distribution area of ​​the water inlet and reduces the influence on the uniformity of the hot and cold water in the water tank by setting the water inlet pipe and the water distribution holes.

[0014] As an optimization, a flame observation hole is provided on the connection plate, and a transparent plate is sealed and fixed in the flame observation hole. This optimization scheme facilitates observation of the flame of the combustion device by providing the flame observation hole, so that corresponding measures can be taken in time.

[0015] The beneficial effects of the present invention are as follows: through the rotation of the drum, the centrifugal force is utilized to form a space in which flames can exist, and the flames and the gas heated by the flames are in direct contact with water, which greatly improves the heating efficiency and heat utilization rate; it can be used for heating and evaporating various non-flammable liquids, and the fuel can be various gases and fuel oils, and it has high versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of a combustion device according to a second embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of a combustion device according to a third embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the process of Embodiment 4 of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the process of Embodiment 5 of the present invention;

[0021] Figure 6 It is a schematic diagram of the drum cross-section structure;

[0022] Figure 7 This is a schematic diagram of the structure of the process of Example 6;

[0023] Figure 8 This is a structural diagram of Embodiment 7;

[0024] Fig. 9 Schematic diagram of liquid-gas pore distribution;

[0025] Fig.10 This is a structural diagram of Embodiment 8;

[0026] As shown in the figure:

[0027] 1. Water tank, 2. Drain port, 3. Flame observation hole, 4. Air inlet pipe, 5. Gas inlet pipe, 6. Diffuser net, 7. Ignitor, 8. Drain hole, 9. Mixing net, 10. Drum, 11. Water inlet pipe, 12. Flame hood, 13. Main shaft, 14. Driving device, 15. Liquid level gauge, 16. Support tube, 17. Connecting plate, 18. Fuel inlet pipe, 19. Auxiliary air inlet pipe, 20. Flame tube, 21. Auxiliary air hole, 22. Fuel gasification coil, 23. Exhaust hole, 24. Gas-liquid hole, 25. Water-displacing tooth, 26. Sealing tube, 27. Water-stop chamber, 28. Spring, 29. Buckle cover, 30. Blocking device, 31. Liquid-gas hole, 32. First partition plate, 33. First guide plate, 34. Separation plate, 35. Concentrate outlet. DETAILED DESCRIPTION

[0028] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0029] Embodiment 1

[0030] like Figure 1 A submerged liquid combustion furnace is shown, comprising a water tank 1, a drum 10 located in the water tank, and a driving device 14 for driving the drum to rotate. The driving device adopts an electric motor. The water tank is used to hold water to be heated. A water inlet and a drain 2 are provided on the side wall of the water tank. The water inlet is fixedly connected to a water inlet pipe 11 extending into the water tank. The water inlet pipe is parallel to the drum and is located below the drum. A plurality of water diversion holes are provided on the wall of the water inlet pipe 11. A steam exhaust hole 23 located above the liquid level in the water tank is provided on the top plate of the water tank. The steam exhaust hole is used to discharge the gas after heat exchange with water to ensure pressure balance in the water tank.

[0031] A plurality of gas-liquid holes 24 are provided on the side wall of the drum. When the drum rotates, the smoke and water in the inner cavity of the drum are thrown out of the drum through the gas-liquid holes under the action of centrifugal force. One end of the drum is sealed and the other end is open. The sealed end of the drum is fixedly connected with a main shaft 13 coaxial with the drum. One end of the main shaft 13 extending out of the water tank is connected to the output shaft of the driving device. The outer cylindrical surface of the open end of the drum is sleeved with a support cylinder 16. The support cylinder 16 and the drum 10 are sealed and rotatably connected, which can be realized by a sealed bearing of the prior art; the support cylinder 16 is sealed and fixedly connected with the water tank 1, which can be realized by full welding; a connecting plate 17 is fixedly connected to one end of the sealing cylinder extending out of the water tank. A drainage cavity is formed between the open end of the drum, the connecting plate and the support cylinder. A drainage hole 8 connected to the drainage cavity is provided on the connecting plate, and the position of the drainage hole is lower than the inner cavity of the drum in the vertical direction. The water that is not thrown out flows out through the drainage hole. At the same time, the staff can judge the water storage situation in the inner cavity of the drum by whether there is water flowing out of the drainage hole to control the ignition timing.

[0032] A combustion device is installed on the connecting plate 17 opposite to the inner cavity of the drum. The combustion device of this embodiment includes an air inlet pipe 4, a gas inlet pipe 5 and an igniter 7 which are penetrated through the connecting plate 17. The air inlet pipe 4 is used to introduce air to provide oxygen required for combustion, the gas inlet pipe is used to introduce gas, and the igniter is used to ignite the gas. The outlet ends of the air inlet pipe 4 and the gas inlet pipe 5 are both facing the inner cavity of the drum, and the ignition end position of the igniter is adapted to the outlet ends of the air inlet pipe and the gas inlet pipe.

[0033] In order to make the flame and high-temperature flue gas more evenly distributed, the combustion device of this embodiment also includes a flame-dividing cover 12 with one end fixed to the connecting plate and the other end extending to the inner cavity of the drum through the open end. The flame-dividing cover is provided with a gas-diffusing net 6 and a mixing net 9 in sequence along the direction of gas introduction. The side wall of the flame-dividing cover is provided with a plurality of smoke outlets located on the side of the mixing net away from the gas-diffusing net. The high-temperature flue gas enters the inner cavity of the drum through the smoke outlets and then enters the water. The gas outlet end of the gas inlet pipe is passed between the gas-diffusing net and the mixing net. The gas outlet end of the air inlet pipe and the gas outlet end of the gas inlet pipe are respectively located on both sides of the gas-diffusing net 6. The gas-diffusing net disperses the incoming air to improve the mixing degree with the gas. The gas and air are further mixed through the mixing net.

[0034] like Figure 6 As shown, the outer side of the drum is fixed with a plurality of water-displacing teeth 25 distributed at intervals along the circumferential direction, and a water-displacing groove is formed between adjacent water-displacing teeth. The gas-liquid hole 24 is located in the water-displacing teeth 25 and penetrates the water-displacing teeth in the radial direction. When the drum rotates, the water in the water tank is stirred by the water-displacing teeth, thereby improving the heating efficiency.

[0035] The connecting plate is also provided with a flame observation hole 3, in which a transparent plate is sealed and fixed, through which the flame condition in the drum can be observed so that timely measures can be taken to ensure the continuity of the heating operation.

[0036] In order to facilitate timely understanding of the water level in the water tank, a liquid level gauge 15 is installed on the outer side wall of the water tank.

[0037] When in use, the drum is driven to rotate by the electric motor, and the water in the drum is thrown out through the gas-liquid hole by the effect of centrifugal force. The flame generated by the combustion device heats the gas in the drum, and the heated gas is also thrown out through the gas-liquid hole under the action of centrifugal force, so as to contact and exchange heat with the water in the water tank. The gas after heat exchange with the water is discharged through the exhaust hole; the heated gas contacts the water more fully, and when the drum rotates, the water in the water tank is stirred, which further improves the heating efficiency.

[0038] Embodiment 2

[0039] The difference between this embodiment and the first embodiment is that Figure 2As shown, the combustion device is a fuel oil and gas mixed burner, which can use oil and gas and gas as fuel at the same time. Specifically, the combustion device includes a flame tube 20, a fuel oil inlet pipe 18 and an igniter which are penetrated on the connecting plate. The front end of the flame tube faces the inner cavity of the drum, and the rear end of the flame tube is fixedly provided with an end plate, on which a gas inlet pipe and an air inlet pipe are fixedly penetrated. A gas dispersion net 6 and a mixing net 9 are sequentially fixed in the flame tube along the gas introduction direction. The gas outlet end of the gas inlet pipe is penetrated between the gas dispersion net and the mixing net, and the gas outlet end of the air inlet pipe and the gas outlet end of the gas inlet pipe are respectively located on both sides of the gas dispersion net.

[0040] A fuel gasification coil 22 is provided at the oil outlet end of the fuel inlet pipe 18, and the fuel gasification coil is located between the gas diffusion network and the mixing network. The oil and gas outlet of the fuel gasification coil corresponds to the gas outlet end of the gas inlet pipe; the ignition end of the igniter is located at the front side of the flame tube.

[0041] The burner of this embodiment uses the oil gas introduced by the oil gasification coil and the gas introduced by the gas inlet pipe as fuel, and introduces air through the air inlet pipe to provide oxygen for combustion, thereby increasing the types of available fuels.

[0042] Embodiment 3

[0043] The difference between this embodiment and the second embodiment is that Figure 3 As shown, the combustion device includes a flame tube, a fuel inlet pipe and an igniter which are penetrated on the connecting plate, the front end of the flame tube faces the inner cavity of the drum, the rear end of the flame tube is fixedly provided with an end plate, a gas inlet pipe and an air inlet pipe are fixedly penetrated on the end plate, a gas diffusion network, a first mixing network and a second mixing network are sequentially fixed in the flame tube along the gas introduction direction, the gas outlet end of the gas inlet pipe is penetrated between the gas diffusion network and the first mixing network, and the gas outlet end of the air inlet pipe and the gas outlet end of the gas inlet pipe are respectively located on both sides of the gas diffusion network.

[0044] A fuel gasification coil 22 is provided at the oil outlet end of the fuel inlet pipe 18, and the oil and gas outlet of the fuel gasification coil is located between the first mixing network and the second mixing network and faces the second mixing network; the ignition end of the igniter is located at the front side of the flame tube.

[0045] The inner side of the connecting plate is also fixedly connected with a sealing cylinder 26 located at the periphery of the flame tube, and the front end of the sealing cylinder is fixedly provided with a sealing plate extending to the wall of the flame tube. A buffer air cavity is formed between the connecting plate, the sealing cylinder, the sealing plate and the flame tube, and an auxiliary air hole 21 connecting the buffer air cavity and the inner cavity of the flame tube is opened on the wall of the flame tube, and an auxiliary air intake pipe 19 connected to the buffer air cavity is penetrated on the connecting plate. Air enters the buffer air cavity through the auxiliary air intake pipe, and then mixes with the oil and gas through the auxiliary air hole to provide oxygen for the combustion of the oil and gas.

[0046] Embodiment 4

[0047] In order to fully utilize the heat, the difference between this embodiment and the first embodiment is that Figure 4 As shown, the steam exhaust hole of the water tank is connected to the steam inlet of the evaporator, and the water inlet of the water tank is connected to the hot water outlet of the evaporator. The water inlet pipe 11 is arranged below the drum, and the drain outlet of the water tank is arranged at the bottom of the water tank, and the concentrated liquid is discharged through the water outlet at the bottom.

[0048] Embodiment 5

[0049] like Figure 5 As shown, the difference between this embodiment and embodiment 4 is that the water inlet pipe 11 is arranged above the drum, and the water inlet pipe is connected to the hot water outlet of the evaporator, the condensed steam outlet, and the system return pipe respectively, which improves the utilization rate of water resources and avoids the waste of water resources.

[0050] Embodiment 6

[0051] like Figure 7 As shown, the difference between this embodiment and the fifth embodiment is that a biomass boiler is used instead of a combustion device, and the high-temperature flue gas output by the biomass boiler is passed into the inner cavity of the drum, and the high-temperature flue gas output by the biomass boiler is thrown into the water tank by the centrifugal force of the rotation of the drum to heat the water. In this embodiment, two drums are arranged, and the two drums are parallel to each other. The water inlet pipe is arranged horizontally and perpendicular to the axes of the two drums to improve the uniformity of water inlet.

[0052] Embodiment 7

[0053] like Figure 8 and 9 As shown, the difference between this embodiment and the first embodiment is that a plurality of centrifugal check valves corresponding to the gas-liquid holes are installed on the drum, specifically, a water-stop chamber 27 connected with the gas-liquid hole is opened at one end of the water-displacing tooth away from the drum, the end of the water-stop chamber away from the drum is an open end, and a buckle cover 29 is fixedly installed on the open end of the water-stop chamber by threads, a plurality of liquid-gas holes 31 connected with the water-stop chamber are opened on the buckle cover 29, a spring 28 opposite to the axial direction of the gas-liquid hole is installed on the inner side surface of the buckle cover, the axial directions of the spring and the gas-liquid hole are consistent with the radial direction of the drum, a sealing device 30 is installed on the end of the spring facing the gas-liquid hole, the sealing device can be a sealing ball, the diameter of the sealing ball is larger than the diameter of the gas-liquid hole, and the gas-liquid hole is blocked by the sealing ball, the sealing device can also be a sealing plate, the outer dimension of the sealing plate is larger than the diameter of the gas-liquid hole, and the gas-liquid hole is blocked by the sealing plate.

[0054] Through the arrangement of this embodiment, the sealing device and the spring form a centrifugal check valve. When the drum is not rotating, the elastic force of the spring is used to push the sealing device to the gas-liquid hole to seal the gas-liquid hole to prevent water in the water tank from entering the inner cavity of the drum. When the drum rotates, the spring is compressed under the action of the centrifugal force of the sealing device, so that the water and smoke in the inner cavity of the drum enter the water-stopping cavity through the gas-liquid hole, and then flow out of the drum through the liquid-gas hole and enter the water tank.

[0055] Embodiment 8

[0056] like Fig.10 As shown, the difference between this embodiment and the first embodiment is that a first partition plate 32 and a second partition plate are sequentially arranged in the water tank, and the height of each partition plate is 1 / 2 to 2 / 3 of the height of the water tank. The interior of the water tank is divided into a primary evaporation chamber, a secondary evaporation chamber and a tertiary evaporation chamber arranged in sequence by the two partition plates, and a roller is provided in the primary evaporation chamber, the secondary evaporation chamber and the tertiary evaporation chamber, a first guide plate 33 is fixedly provided in the secondary evaporation chamber between the first partition plate and the roller, and a first guide chamber is formed between the first partition plate 32 and the first guide plate 33, a second guide plate is fixedly provided in the tertiary evaporation chamber between the second partition plate and the roller, and a second guide chamber is formed between the second partition plate and the second guide plate.

[0057] The water inlet pipe is arranged below the roller in the primary evaporation chamber, a concentrated liquid outlet 35 is arranged on the side wall of the tertiary evaporation chamber, and a separation plate 34 is fixedly arranged in the tertiary evaporation chamber at the upstream side of the concentrated liquid outlet.

[0058] The arrangement of this embodiment forms a submerged liquid multi-stage evaporator. The liquid to be heated enters the primary evaporation chamber through the water inlet pipe, and primary evaporation is performed by the rotation and heating of the drum in the primary evaporation chamber. The liquid after the primary evaporation enters the secondary evaporation chamber through the first guide chamber for secondary evaporation. The liquid after the secondary evaporation enters the tertiary evaporation chamber through the second guide chamber. The concentrated liquid formed after the three-stage evaporation enters the concentrated liquid outlet for discharge.

[0059] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by using existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention, and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A submerged liquid combustion furnace, characterized in that: It comprises a water tank (1) provided with a water inlet and a water outlet, a drum (10) located in the water tank, and a driving device (14) for driving the drum to rotate, and the water tank is provided with a steam exhaust hole (23) located above the liquid level in the water tank; A plurality of gas-liquid holes (24) are provided on the side wall of the drum. One end of the drum is sealed and the other end is open. A main shaft coaxial with the drum is fixedly connected to the sealed end of the drum. One end of the main shaft extending out of the water tank is drivingly connected to an output shaft of a driving device. A support cylinder (16) is sleeved on the outer circumferential surface of the open end of the drum. The support cylinder (16) is sealingly and rotatably connected to the drum (10). The support cylinder (16) is sealingly and fixedly connected to the water tank (1). One end of the sealing cylinder extending out of the water tank is fixedly connected to a connecting plate (17). A combustion device opposite to the inner cavity of the drum is mounted on the connecting plate (17). A plurality of centrifugal check valves corresponding to the gas-liquid holes are installed on the drum.

2. The submerged liquid combustion furnace according to claim 1, characterized in that: A plurality of water-displacing teeth (25) are fixedly arranged on the outer side surface of the drum and are spaced apart in the circumferential direction. Water-displacing grooves are formed between adjacent water-displacing teeth. The gas-liquid hole (24) is located in the water-displacing teeth (25) and penetrates the water-displacing teeth in the radial direction.

3. The submerged liquid combustion furnace according to claim 1, characterized in that: The combustion device comprises an air inlet pipe (4), a gas inlet pipe (5) and an igniter (7) which are arranged on a connecting plate (17); the gas outlet ends of the air inlet pipe (4) and the gas inlet pipe (5) face the inner cavity of the drum; and the ignition end of the igniter is positioned to match the gas outlet ends of the air inlet pipe and the gas outlet ends of the gas inlet pipe.

4. The submerged liquid combustion furnace according to claim 3, characterized in that: It also includes a flame-dividing hood (12) having one end fixedly connected to the connecting plate and the other end extending to the inner cavity of the drum through the open end. A gas diffusing net (6) and a mixing net (9) are fixedly arranged in sequence in the flame-dividing hood along the direction of gas introduction. A plurality of smoke outlets are provided on the side wall of the flame-dividing hood, which are located on the side of the mixing net away from the gas diffusing net. The gas outlet end of the gas inlet pipe is passed through between the gas diffusing net and the mixing net, and the gas outlet end of the air inlet pipe and the gas outlet end of the gas inlet pipe are respectively located on both sides of the gas diffusing net (6).

5. The submerged liquid combustion furnace according to claim 1, characterized in that: The combustion device comprises a flame tube (20) penetrated on the connecting plate, a fuel inlet pipe (18) and an igniter, the front end of the flame tube faces the inner cavity of the drum, the rear end of the flame tube is fixedly provided with an end plate, a gas inlet pipe and an air inlet pipe are penetrated on the end plate, a gas dispersion net (6) and a mixing net (9) are sequentially fixed in the flame tube along the direction of gas introduction, the gas outlet end of the gas inlet pipe is penetrated between the gas dispersion net and the mixing net, and the gas outlet end of the air inlet pipe and the gas outlet end of the gas inlet pipe are respectively located on both sides of the gas dispersion net; The oil outlet end of the fuel inlet pipe (18) is provided with a fuel gasification coil (22), and the oil and gas outlet of the fuel gasification coil corresponds to the gas outlet end of the fuel gas inlet pipe; the ignition end of the igniter is located at the front side of the flame tube.

6. The submerged liquid combustion furnace according to claim 1, characterized in that: The combustion device comprises a flame tube, a fuel inlet pipe and an igniter which are inserted through the connecting plate. The front end of the flame tube faces the inner cavity of the drum. The rear end of the flame tube is fixedly provided with an end plate. A gas inlet pipe and an air inlet pipe are inserted through the end plate. A gas diffuser net, a first mixing net and a second mixing net are fixedly provided in the flame tube in sequence along the direction of gas introduction. The gas outlet end of the gas inlet pipe is inserted between the gas diffuser net and the first mixing net. The gas outlet end of the air inlet pipe and the gas outlet end of the gas inlet pipe are respectively located on both sides of the gas diffuser net. A fuel gasification coil (22) is provided at the oil outlet end of the fuel inlet pipe (18), and the oil and gas outlet of the fuel gasification coil is located between the first mixing network and the second mixing network and faces the second mixing network; the ignition end of the igniter is located at the front side of the flame tube; The inner side surface of the connecting plate is also fixedly connected to a sealing cylinder (26) located at the periphery of the flame tube. The front end of the sealing cylinder is fixedly provided with a sealing plate extending to the wall of the flame tube. A buffer air cavity is formed between the connecting plate, the sealing cylinder, the sealing plate and the flame tube. An auxiliary air hole (21) connecting the buffer air cavity and the inner cavity of the flame tube is opened on the wall of the flame tube. An auxiliary air inlet pipe (19) connected to the buffer air cavity is passed through the connecting plate.

7. The submerged liquid combustion furnace according to claim 1, characterized in that: A drainage hole (8) is provided on the connecting plate, and the position of the drainage hole is lower than the inner cavity of the drum in the vertical direction.

8. The submerged liquid combustion furnace according to claim 1, characterized in that: The steam exhaust hole of the water tank is connected to the steam inlet of the evaporator, and the water inlet of the water tank is connected to the hot water outlet of the evaporator.

9. The submerged liquid combustion furnace according to claim 1, characterized in that: The water inlet of the water tank is fixedly connected to a water inlet pipe (11) extending into the water tank, and a plurality of water distribution holes are provided on the pipe wall of the water inlet pipe.

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