An energy-saving boiler and a method for returning biogas to the furnace in a waste treatment system

Abstract

The present invention relates to the technical field of waste treatment boilers, and discloses an energy-saving boiler and a method for returning biogas to the furnace in a waste treatment system. After the delivery volume of biogas increases, the annular pipe stirs the internal water seal, causing the height of one side of the water seal to decrease intermittently, so that the sealing effect at the corresponding position generated by the lower height of the water seal liquid surface of the surplus biogas disappears, enabling the biogas to be transported into the annular pipe from the corresponding position where the water seal liquid surface decreases in height. The biogas is then transported into the horizontal boiler by the annular pipe, and the waste in the layer combustion is used to ignite the biogas flowing into the horizontal boiler, so that the burning biogas further aids in burning the waste, forming the effect of returning biogas to the furnace to assist in burning the waste. Thus, by controlling the height of the water seal liquid surface, the surplus biogas is controlled to change the delivery position from the chamber combustion position of the biogas to the layer combustion position of the waste, thereby forming the return of biogas to the furnace, avoiding the energy waste caused by the expanded combustion of biogas, and improving the energy-saving effect of the boiler.

Description

Technical Field

[0001] The present invention relates to the technical field of waste treatment boilers, and an energy-saving boiler and a method for returning biogas to the furnace in a waste treatment system. Background Art

[0002] An incinerator is a harmless treatment device commonly used in medical and domestic waste, and the harmless treatment of animals. Its principle is to use the combustion of fuels such as coal, fuel oil, and gas to incinerate and carbonize the objects to be treated at high temperatures to achieve the purpose of disinfection.

[0003] In existing boilers, such as Chinese Patent CN103471103B, by adopting a combustion method combining stoker firing and chamber firing, the combustion efficiency of the boiler is improved. The waste uses a combustion device with a two-stage reciprocating grate, and the biogas from the leachate of the waste enters the furnace for combustion through a biogas burner installed on the side wall above the grate. Among them, the biogas burner is a volute swirl burner. The inner circle of the biogas burner is the biogas from the leachate of the waste, the outer circle is the air supply, and a viewing hole is arranged in the middle to observe the combustion situation of the biogas. The air forms a swirl through the volute, and the biogas is vertically sprayed into the air swirl from many small holes on the central gas pipe, thereby increasing the contact surface of the two airflows and strengthening the mixing.

[0004] However, there are still the following problems: Treating waste in a chamber firing method will cause the waste treatment speed to be too fast, and a large amount of energy is lost through heat dissipation, resulting in the boiler not being energy-saving in waste treatment and a large amount of energy waste. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an energy-saving boiler and a method for returning biogas to the furnace in a waste treatment system, which have the advantages of controlling the height of the water seal liquid level to control the surplus biogas to change the conveying position from the conveying to the chamber firing position of the biogas to the stoker firing position of the waste, thereby forming biogas returning to the furnace, avoiding energy waste caused by the expansion of biogas combustion, and improving the energy-saving effect of the boiler, etc., and solving the problems that treating waste in a chamber firing method will cause the waste treatment speed to be too fast, and a large amount of energy is lost through heat dissipation, resulting in the boiler not being energy-saving in waste treatment and a large amount of energy waste.

[0006] To achieve the above object, the present invention provides the following technical solution: An energy-saving boiler, comprising a horizontal boiler, a waste treatment mechanism arranged in the horizontal boiler, and a biogas treatment mechanism arranged beside the horizontal boiler. The waste treatment mechanism includes a pusher assembly, and the pusher assembly is arranged in the horizontal boiler and is used for pushing waste into the horizontal boiler for stoker firing treatment;

[0007] The biogas treatment mechanism includes a vertical boiler and an annular pipe. The vertical boiler is fixedly arranged beside the horizontal boiler. The vertical boiler is used for burning biogas. An annular pipe is arranged between the vertical boiler and the horizontal boiler. Water is injected at the inner bottom end of the annular pipe. The conveying pressure of biogas in the vertical boiler simultaneously controls the annular pipe to stir the water. When the conveying pressure of biogas increases, the annular pipe stirs the water to deflect to one side, so that the excessive biogas passes through the water seal in the annular pipe and returns to the furnace and is sent into the horizontal boiler to assist in the layer combustion of garbage.

[0008] Preferably, the garbage treatment mechanism further includes fixed brackets. A plurality of fixed brackets are fixedly installed in the horizontal boiler. The fixed brackets are evenly distributed in a straight line and symmetrically distributed on both sides inside the horizontal boiler. Movement support balls are movably arranged on the fixed brackets. The movement support balls roll on the fixed brackets. An activity bracket is slidably fitted inside the horizontal boiler. The size of the activity bracket is adapted to the internal cross-sectional size of the horizontal boiler. The bottom end of the fixed bracket abuts against the movement support ball.

[0009] Preferably, a plurality of first grate plates are rotatably fitted inside the horizontal boiler. The first grate plates are evenly distributed in a straight line and are all located above the activity bracket. A plurality of second grate plates are rotatably fitted on the activity bracket. The second grate plates are evenly distributed in a straight line and are all located between the first grate plates and the activity bracket. The bottom surfaces of the second grate plates are adjacent to the bottom surfaces of the first grate plates. When the activity bracket moves, the second grate plates are driven to extend out from between the adjacent first grate plates. One side of the horizontal boiler is an open end. Garbage is placed on the first grate plates and the second grate plates from one side of the horizontal boiler.

[0010] Preferably, a motor is fixedly arranged beside one side of the horizontal boiler. A turntable is fixedly installed on the shaft of the motor. A linkage rod is arranged on the turntable. One end of the linkage rod is rotatably fitted with the turntable. A rotating rod is arranged at the bottom end of the activity bracket. One end of the rotating rod is rotatably fitted with the activity bracket. The other end of the rotating rod is rotatably fitted with the other end of the linkage rod.

[0011] Preferably, a plurality of ash cleaning ports are arranged at the bottom end of one side of the horizontal boiler. The ash cleaning ports all penetrate through the wall surface of the horizontal boiler. The ash cleaning ports are used for cleaning the combustion ash generated after the layer combustion of garbage in the horizontal boiler. A partition support plate is fixedly installed in the horizontal boiler. The partition support plate is located below the innermost first grate plate inside the horizontal boiler. The partition support plate supports the innermost first grate plate inside the horizontal boiler.

[0012] Preferably, the biogas treatment mechanism further includes a steam furnace. The top of the vertical boiler is an open end, and the steam furnace is fixedly installed at the top of the vertical boiler. The size of the steam furnace is adapted to the size of the top of the vertical boiler, and the vertical boiler is sealed with the steam furnace.

[0013] Preferably, a connecting member is fixedly arranged beside the vertical boiler. One end of the connecting member is connected to the biogas supply system. An impeller is rotatably fitted inside the connecting member. The size of the impeller is adapted to the inside of the connecting member. A valve is fixedly installed at the other end of the connecting member. One end of the valve is communicated with the connecting member. A gas delivery pipe is fixedly installed at the bottom end of the side of the vertical boiler. The gas delivery pipe penetrates through the vertical boiler, and the gas delivery pipe is sealed with the vertical boiler. One end of the gas delivery pipe is communicated with the other end of the valve. The other end of the gas delivery pipe extends to the middle inside the vertical boiler. A biogas nozzle is fixedly installed at the other end of the gas delivery pipe. The biogas nozzle is communicated with the other end of the gas delivery pipe.

[0014] Preferably, a igniter is fixedly installed at the bottom end inside the vertical boiler. The top end of the igniter extends above the biogas nozzle. The igniter is adjacent to the biogas nozzle. The igniter is connected to the power supply system and is used for igniting the biogas. An oxygen pipe is fixedly installed on the vertical boiler. The oxygen pipe penetrates through the vertical boiler, and the oxygen pipe is sealed with the vertical boiler. One end of the oxygen pipe is connected to the oxygen supply system. The other end of the oxygen pipe extends beside the biogas nozzle. An air port is fixedly installed at the other end of the oxygen pipe. The air port is communicated with the oxygen pipe.

[0015] Preferably, the annular pipe is fixedly arranged beside the vertical boiler. A one-way pipe is arranged between the annular pipe and the gas delivery pipe. One end of the one-way pipe is communicated with the lower part of the annular pipe. The other end of the one-way pipe is communicated with the gas delivery pipe. One end of the one-way pipe is of an inverted V-shaped structure. Water is injected into the bottom end inside the annular pipe. The water surface inside the annular pipe is higher than the connection part of the annular pipe and the one-way pipe. The water surface inside the annular pipe is lower than the top end of the inverted V-shaped structure of the one-way pipe. A plurality of baffle plates are slidably fitted inside the annular pipe. The baffle plates are evenly distributed inside the annular pipe. The baffle plates move along the shape of the annular pipe. The baffle plates are driven by a chain. A sprocket is rotatably fitted inside the annular pipe. The sprocket is engaged with the chain. A universal shaft rod is arranged between the annular pipe and the connecting member. One end of the universal shaft rod is power-connected to the sprocket. The other end of the universal shaft rod is power-connected to the impeller. A return pipe is arranged between the annular pipe and the horizontal boiler. One end of the return pipe is communicated with the top end of the annular pipe. The other end of the return pipe is communicated with the horizontal boiler.

[0016] A method for recycling biogas in a garbage disposal system, which uses the above-mentioned energy-saving boiler.

[0017] Compared with the prior art, the present invention provides an energy-saving boiler, which has the following beneficial effects:

[0018] 1. In this energy-saving boiler, after the biogas delivery volume increases, the annular pipe stirs the water seal inside, causing the height of one side of the water seal to decrease intermittently, so that the sealing effect of the corresponding position disappears when the surplus biogas uses the lower height of the water seal liquid level, enabling the biogas to be transported into the annular pipe from the corresponding position where the water seal liquid level decreases. Then, the biogas is transported from the annular pipe into the horizontal boiler, and the layer-burning garbage is used to ignite the biogas flowing into the horizontal boiler, so that the burning biogas further assists in burning the garbage, forming the effect of biogas recycling and assisting in burning the garbage. Thus, by controlling the height of the water seal liquid level, the surplus biogas is controlled to change the delivery position from the chamber combustion position of the biogas to the layer combustion position of the garbage, thereby forming biogas recycling, avoiding energy waste caused by the expanded combustion of biogas, and improving the energy-saving effect of the boiler.

[0019] 2. In this energy-saving boiler, through the setting of the moving support ball, the movement of the movable support in the horizontal boiler is made smoother, the frictional resistance during the movement of the movable support is reduced, and the stability of the equipment operation is improved.

[0020] 3. In this energy-saving boiler, through the design of the inverted V-shaped structure at one end of the one-way pipe, the water in the water seal of the annular pipe will not flow back into the air supply pipe, and the water in the water seal is stirred by the baffle plate, so that the liquid level of the water seal drops to leave the one-way pipe, and the wind force of the biogas transportation is used to judge whether there is surplus biogas that can be utilized. Thus, the utilization of biogas is controlled through the ingenuity of the cooperation between the mechanical structures, and the processing efficiency of the equipment is improved on the premise of ensuring that the equipment will not cause a large amount of energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the energy-saving boiler of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the garbage disposal mechanism of the present invention;

[0023] Figure 3 It is a schematic diagram of the internal structure distribution of the horizontal boiler of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure distribution at the movable support of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the biogas treatment mechanism of the present invention;

[0026] Figure 6Schematic diagram of the internal structure distribution of the vertical boiler of the present invention;

[0027] Figure 7 Schematic diagram of the internal structure distribution of the connecting part of the present invention;

[0028] Figure 8 Schematic diagram of the internal structure distribution of the annular tube of the present invention.

[0029] In the figure: 1, horizontal boiler; 2, garbage treatment mechanism; 2001, pushing component; 21, fixed bracket; 22, moving supporting ball; 23, movable bracket; 24, first grate bar; 25, second grate bar; 26, motor; 27, turntable; 28, linkage rod; 29, rotating rod; 210, ash cleaning port; 211, dividing support plate; 3, biogas treatment mechanism; 31, vertical boiler; 32, steam boiler; 33, connecting part; 34, impeller; 35, valve; 36, air supply pipe; 37, biogas nozzle; 38, ignition head; 39, oxygen pipe; 310, air port; 311, annular tube; 312, one-way tube; 313, baffle; 314, sprocket; 315, universal shaft rod; 316, return furnace pipe. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present application proposes an energy-saving boiler and a method for returning biogas in a garbage treatment system.

[0032] Embodiment 1. In a typical implementation manner of the present application, as Figure 1 shown, an energy-saving boiler and a method for returning biogas in a garbage treatment system include a horizontal boiler 1, a garbage treatment mechanism 2 arranged in the horizontal boiler 1, and a biogas treatment mechanism 3 arranged beside the horizontal boiler 1, and are characterized in that:

[0033] The garbage treatment mechanism 2 includes a pushing component 2001. The pushing component 2001 is arranged in the horizontal boiler 1 and is used to push garbage into the horizontal boiler 1 for traveling grate combustion treatment;

[0034] The biogas treatment mechanism 3 includes a vertical boiler 31 and an annular pipe 311. The vertical boiler 31 is fixedly arranged beside the horizontal boiler 1. The vertical boiler 31 is used for burning biogas. An annular pipe 311 is arranged between the vertical boiler 31 and the horizontal boiler 1. The inner bottom end of the annular pipe 311 is filled with water. The conveying pressure of the biogas in the vertical boiler 31 simultaneously controls the annular pipe 311 to stir the water. When the conveying pressure of the biogas increases, the annular pipe 311 stirs the water to offset to one side, so that the excessive biogas passes through the water seal in the annular pipe 311 and returns to the furnace and is sent into the horizontal boiler 1 to assist the garbage bed combustion.

[0035] When the present invention is used:

[0036] Place the garbage on the pushing component 2001, start the pushing component 2001, and the pushing component 2001 pushes the garbage into the horizontal boiler 1, so that the garbage is subjected to bed combustion treatment in the horizontal boiler 1. At the same time, send the biogas into the vertical boiler 31, so that the biogas burns in the vertical boiler 31. However, when the conveying amount of the biogas becomes larger, in order to maintain the effective recovery of energy, it cannot be directly sent to the vertical boiler 31 for combustion, which will increase the waste of energy. After the conveying amount of the biogas becomes larger, the annular pipe 311 stirs the internal water seal, so that the height of one side of the water seal is intermittently reduced, so that the sealing effect of the corresponding position disappears after the surplus biogas uses the lower height of the water seal liquid level, so that the biogas is transported into the annular pipe 311 from the corresponding position where the water seal liquid level is reduced. The biogas is then transported into the horizontal boiler 1 by the annular pipe 311, and the burning biogas is used to ignite the biogas flowing into the horizontal boiler 1, so that the burning biogas further assists in burning the garbage, forming the effect of the biogas returning to the furnace to assist in burning the garbage. Thus, by controlling the height of the water seal liquid level, the surplus biogas is controlled to change the conveying position from the chamber combustion position of the biogas to the bed combustion position of the garbage, thereby forming the biogas returning to the furnace, avoiding the energy waste caused by the expanded combustion of the biogas, and improving the energy-saving effect of the boiler.

[0037] Embodiment 2, as Figures 2 - 4 shown, the difference from the above embodiment is that the garbage treatment mechanism 2 further includes a fixed support 21. A plurality of fixed supports 21 are fixedly installed in the horizontal boiler 1. The fixed supports 21 are evenly distributed in a straight line. The fixed supports 21 are symmetrically distributed on both sides in the horizontal boiler 1. Movement support balls 22 are movably arranged on the fixed supports 21. The movement support balls 22 roll on the fixed supports 21. An activity support 23 is slidably fitted in the horizontal boiler 1. The size of the activity support 23 is adapted to the internal cross-sectional size of the horizontal boiler 1. The bottom end of the fixed support 21 abuts against the movement support ball 22.

[0038] Further, a plurality of first grate plates 24 are rotatably fitted in the horizontal boiler 1. The first grate plates 24 are evenly distributed in a straight line and are all located above the movable support 23. A plurality of second grate plates 25 are rotatably fitted on the movable support 23. The second grate plates 25 are evenly distributed in a straight line and are all located between the first grate plates 24 and the movable support 23. The bottom surfaces of the respective second grate plates 25 are adjacent to the bottom surfaces of the respective first grate plates 24. When the movable support 23 moves, the second grate plates 25 are driven to extend out from between the adjacent first grate plates 24. One side of the horizontal boiler 1 is an open end, and the garbage is placed on the first grate plates 24 and the second grate plates 25 from one side of the horizontal boiler 1.

[0039] Further, the pusher assembly 2001 includes the first grate plates 24 and the second grate plates 25.

[0040] Further, a motor 26 is fixedly arranged beside one side of the horizontal boiler 1. A turntable 27 is fixedly installed on the shaft of the motor 26. A linkage rod 28 is arranged on the turntable 27. One end of the linkage rod 28 is rotatably fitted with the turntable 27. A rotating rod 29 is arranged at the bottom end of the movable support 23. One end of the rotating rod 29 is rotatably fitted with the movable support 23, and the other end of the rotating rod 29 is rotatably fitted with the other end of the linkage rod 28.

[0041] Among them, when treating the garbage, first place the garbage on the first grate plates 24 at the open end position of the horizontal boiler 1 for stacking. Start the motor 26. The motor 26 drives the turntable 27 to rotate. The turntable 27 drives one end of the linkage rod 28 to rotate, so that the linkage rod 28 drives the rotating rod 29 to move, and the rotating rod 29 drives the movable support 23 to reciprocate in the horizontal boiler 1. At the same time, the movable support 23 is supported by the fixed support 21 and the moving support ball 22, so that the movable support 23 makes use of the rolling friction brought by the moving support ball 22, and the movable support 23 runs smoothly in the horizontal boiler 1. Then, the reciprocating movable support 23 drives the second grate plates 25 to reciprocate, so that the second grate plates 25 reciprocally extend and retract on the first grate plates 24, thereby enabling the garbage to be pushed on the first grate plates 24 and the second grate plates 25 by the reciprocally extending and retracting second grate plates 25. At the same time, the garbage is subjected to overbed combustion treatment on the first grate plates 24 and the second grate plates 25, and the ashes generated by the garbage combustion fall to the bottom end in the horizontal boiler 1.

[0042] Further, a plurality of ash cleaning ports 210 are arranged at the bottom end of one side of the horizontal boiler 1. The ash cleaning ports 210 all penetrate through the wall surface of the horizontal boiler 1. The ash cleaning ports 210 are used for cleaning the combustion ash generated after the overbed combustion of the garbage in the horizontal boiler 1. A partition support plate 211 is fixedly installed in the horizontal boiler 1. The partition support plate 211 is located below the first grate plates 24 at the innermost side in the horizontal boiler 1, and the partition support plate 211 supports the first grate plates 24 at the innermost side in the horizontal boiler 1.

[0043] Furthermore, the overall movement of the garbage on the first grate bar 24 and the second grate bar 25 can complete the layered combustion treatment of the garbage, preventing the garbage from falling into the gap between the partition support plate 211 and the horizontal boiler 1. As for the ash falling on the inner bottom end of the horizontal boiler 1, the ash cleaning port 210 can be opened to clean the ash in the horizontal boiler 1.

[0044] Embodiment 3, as Figures 5 - 8 shown, the difference from the above embodiment is that the biogas treatment mechanism 3 further includes a steam boiler 32. The top end of the vertical boiler 31 is an open end, and a steam boiler 32 is fixedly installed at the top end of the vertical boiler 31. The size of the steam boiler 32 is adapted to the size of the top end of the vertical boiler 31, and the vertical boiler 31 and the steam boiler 32 are sealed.

[0045] Furthermore, the steam boiler 32 is a prior art, specifically for recovering the energy generated by the combustion of biogas by heating water. Specifically, a water inlet pipe is provided on the steam boiler 32 to supply water to the steam boiler 32, a drain pipe is provided on the steam boiler 32, a steam pipe is provided on the steam boiler 32, and a temperature sensor is provided on the steam boiler 32. As for the specific structures included in the rest of the steam boiler 32, they will not be elaborated here.

[0046] Furthermore, a connecting member 33 is fixedly arranged beside the vertical boiler 31. One end of the connecting member 33 is connected to the biogas supply system. An impeller 34 is rotatably fitted inside the connecting member 33. The size of the impeller 34 is adapted to the inside of the connecting member 33. A valve 35 is fixedly installed at the other end of the connecting member 33. One end of the valve 35 is communicated with the connecting member 33. An air supply pipe 36 is fixedly installed at the bottom end of the side of the vertical boiler 31. The air supply pipe 36 penetrates through the vertical boiler 31, and the air supply pipe 36 and the vertical boiler 31 are sealed. One end of the air supply pipe 36 is communicated with the other end of the valve 35. The other end of the air supply pipe 36 extends to the middle inside the vertical boiler 31. A biogas nozzle 37 is fixedly installed at the other end of the air supply pipe 36. The biogas nozzle 37 is communicated with the other end of the air supply pipe 36.

[0047] Among them, when treating biogas, the biogas supply system first transports the biogas into the connecting member 33. In the connecting member 33, the wind force of the biogas drives the impeller 34 to rotate. Then the biogas passes through the connecting member 33 and enters the valve 35. The valve 35 is used to control the on-off of the biogas transportation. The biogas passes through the valve 35 and enters the air supply pipe 36, and then enters the biogas nozzle 37 from the air supply pipe 36. The biogas is sprayed out from the biogas nozzle 37 and enters the vertical boiler 31.

[0048] Furthermore, an ignition head 38 is fixedly installed at the bottom end of the vertical boiler 31, and the top end of the ignition head 38 extends to the top of the biogas nozzle 37. The ignition head 38 is adjacent to the biogas nozzle 37, and the ignition head 38 is connected to the power supply system. The ignition head 38 is used to ignite the biogas. An oxygen pipe 39 is fixedly installed on the vertical boiler 31. The oxygen pipe 39 runs through the vertical boiler 31. The oxygen pipe 39 and the vertical boiler 31 are sealed. One end of the oxygen pipe 39 is connected to the oxygen supply system, and the other end of the oxygen pipe 39 extends to the side of the biogas nozzle 37. An air port 310 is fixedly installed on the other end of the oxygen pipe 39, and the air port 310 is connected to the oxygen pipe 39.

[0049] Among them, oxygen is transported to the oxygen pipe 39 by the oxygen supply system, and oxygen is transported from the oxygen pipe 39 to the air inlet 310, and oxygen is sprayed into the vertical boiler 31 from the air inlet 310, so that the oxygen is mixed with the biogas in the vertical boiler 31, and then the ignition head 38 is used to ignite the vertical boiler 31, so that the biogas is burned in the vertical boiler 31.

[0050] Furthermore, an annular tube 311 is fixedly arranged beside the vertical boiler 31, and a one-way tube 312 is arranged between the annular tube 311 and the air supply pipe 36, one end of the one-way tube 312 is connected to the lower part of the annular tube 311, and the other end of the one-way tube 312 is connected to the air supply pipe 36, one end of the one-way tube 312 is an inverted V-shaped structure, the bottom end of the annular tube 311 is filled with water, the water level in the annular tube 311 is higher than the connection point between the annular tube 311 and the one-way tube 312, and the water level in the annular tube 311 is lower than the top of the inverted V-shaped structure of the one-way tube 312, and a plurality of paddles 313 are slidably matched in the annular tube 311, and the paddles 313 are arranged on the annular tube 311. The ring tube 311 is evenly distributed in the ring tube 311, and the paddle plate 313 moves along the shape of the ring tube 311. The paddle plate 313 is driven by a chain. A sprocket 314 is rotated in the ring tube 311, and the sprocket 314 is meshed with the chain. A universal shaft 315 is arranged between the ring tube 311 and the connecting piece 33, and one end of the universal shaft 315 is connected to the sprocket 314, and the other end of the universal shaft 315 is connected to the impeller 34. A return furnace pipe 316 is arranged between the ring tube 311 and the horizontal boiler 1, and one end of the return furnace pipe 316 is connected to the top of the ring tube 311, and the other end of the return furnace pipe 316 is connected to the horizontal boiler 1.

[0051] Furthermore, the movement speed of the paddle 313 driven by the transportation of biogas in normal low-loss energy is not sufficient to paddle and lower the liquid level on one side of the water seal to below the connection point between the one-way pipe 312 and the annular pipe 311 .

[0052] Among them, when the delivery volume of biogas increases, the wind force generated by biogas delivery increases, causing the rotation speed of the impeller 34 to increase. The impeller 34 drives the universal shaft rod 315 to rotate, and the universal shaft rod 315 drives the sprocket 314 to rotate. The sprocket 314 uses a chain to drive the dial 313 to perform a turnover motion along the shape of the annular pipe 311 in the annular pipe 311, causing the dial 313 to stir the water at the lower end in the annular pipe 311, so that the liquid level on one side of the water seal drops below the connection between the one-way pipe 312 and the annular pipe 311, causing the one-way pipe 312 and the annular pipe 311 to no longer be sealed by the water seal for a long time. After each ventilation between the one-way pipe 312 and the annular pipe 311, biogas enters the one-way pipe 312 from the gas supply pipe 36, then enters the annular pipe 311 from the one-way pipe 312, and then the biogas enters the return furnace pipe 316 from the annular pipe 311, so that the biogas flows into the horizontal boiler 1 from the return furnace pipe 316, thereby enabling the biogas to return to the furnace and enter the horizontal boiler 1 to assist in the grate firing of garbage.

[0053] Working principle of the energy-saving boiler as a whole:

[0054] Place the garbage on the pusher assembly 2001 and start the pusher assembly 2001. The pusher assembly 2001 pushes the garbage into the horizontal boiler 1 to perform grate firing of the garbage in the horizontal boiler 1. At the same time, biogas is delivered into the vertical boiler 31 to burn the biogas in the vertical boiler 31. However, when the delivery volume of biogas increases, in order to maintain effective energy recovery, it cannot be directly sent to the vertical boiler 31 for combustion, which will increase energy waste. After the delivery volume of biogas increases, the annular pipe 311 stirs the internal water seal, causing the height of one side of the water seal to decrease intermittently, so that the sealing effect at the corresponding position disappears due to the lower height of the water seal liquid level for the surplus biogas, enabling the biogas to be delivered into the annular pipe 311 from the corresponding position where the water seal liquid level drops. The biogas is then delivered from the annular pipe 311 into the horizontal boiler 1, and the burning biogas is used to ignite the biogas flowing into the horizontal boiler 1, so that the burning biogas further assists in burning the garbage, forming the effect of biogas returning to the furnace to assist in burning the garbage. Thus, by controlling the height of the water seal liquid level, the delivery of surplus biogas is controlled to change from the chamber combustion position of biogas to the grate firing position of garbage, thereby forming biogas returning to the furnace, avoiding energy waste caused by the expanded combustion of biogas, and improving the energy-saving effect of the boiler;

[0055] Among them, when treating garbage, the garbage is first placed on the first grate 24 at the open end of the horizontal boiler 1 for stacking. Then, the motor 26 is started. The motor 26 drives the turntable 27 to rotate. The turntable 27 drives one end of the linkage rod 28 to rotate, so that the linkage rod 28 drives the rotating rod 29 to move, causing the rotating rod 29 to drive the movable support 23 to reciprocate in the horizontal boiler 1. At the same time, the fixed support 21 and the moving support ball 22 support the movable support 23, enabling the movable support 23 to utilize the rolling friction brought by the moving support ball 22, so that the movable support 23 runs smoothly in the horizontal boiler 1. Then, the reciprocating movable support 23 drives the second grate 25 to reciprocate, causing the second grate 25 to reciprocally expand and contract on the first grate 24. Thus, the garbage is pushed by the reciprocally expanding and contracting second grate 25 on the first grate 24 and the second grate 25. At the same time, the garbage is subjected to overbed combustion treatment on the first grate 24 and the second grate 25. The ashes generated by the garbage combustion fall to the bottom end inside the horizontal boiler 1. The ashes falling on the bottom end inside the horizontal boiler 1 can open the ash cleaning port 210 to clean the ashes in the horizontal boiler 1;

[0056] When treating biogas, the biogas supply system first transports the biogas into the connecting member 33. In the connecting member 33, the wind force of the biogas drives the impeller 34 to rotate. Then, the biogas passes through the connecting member 33 and enters the valve 35. The valve 35 is used to control the on-off of the biogas transportation. The biogas passes through the valve 35 and enters the gas delivery pipe 36, and then enters the biogas nozzle 37 from the gas delivery pipe 36. The biogas is sprayed out from the biogas nozzle 37 and enters the vertical boiler 31;

[0057] Then, the oxygen supply system transports oxygen into the oxygen pipe 39. The oxygen is transported from the oxygen pipe 39 into the air inlet 310, and the oxygen is sprayed into the vertical boiler 31 from the air port 310, so that the oxygen is mixed with the biogas in the vertical boiler 1. Then, the ignition head 38 is used to ignite the vertical boiler 31, so that the biogas burns in the vertical boiler 31;

[0058] When the delivery volume of biogas increases, the wind force generated by biogas delivery increases, causing the rotation speed of the impeller 34 to increase. The impeller 34 drives the universal shaft rod 315 to rotate, and the universal shaft rod 315 drives the sprocket 314 to rotate. The sprocket 314 uses a chain to drive the baffle 313 to perform a turnover motion along the shape of the annular pipe 311 in the annular pipe 311, causing the baffle 313 to stir the water at the lower end in the annular pipe 311, so that the liquid level on one side of the water seal drops below the connection between the one-way pipe 312 and the annular pipe 311, so that the one-way pipe 312 and the annular pipe 311 are no longer sealed by the water seal for a long time. After each ventilation between the one-way pipe 312 and the annular pipe 311, biogas will enter the one-way pipe 312 from the air supply pipe 36, and then the biogas will enter the annular pipe 311 from the one-way pipe 312, and then the biogas will enter the return pipe 316 from the annular pipe 311, so that the biogas flows into the horizontal boiler 1 from the return pipe 316, so that the biogas returns to the furnace and enters the horizontal boiler 1 to assist in the grate combustion treatment of garbage.

[0059] A method for returning biogas to the furnace in a garbage treatment system uses the above energy-saving boiler.

[0060] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving boiler, comprising a horizontal boiler, a garbage treatment mechanism disposed in the horizontal boiler, and a biogas treatment mechanism disposed beside the horizontal boiler, characterized in that: The garbage treatment mechanism includes a feeding assembly disposed in the horizontal boiler, and the feeding assembly is used to push garbage into the horizontal boiler for stratified combustion treatment; The biogas treatment mechanism includes a vertical boiler and an annular pipe. The vertical boiler is fixedly disposed beside the horizontal boiler, and the vertical boiler is used for burning biogas. An annular pipe is disposed between the vertical boiler and the horizontal boiler. Water is injected into the bottom end of the annular pipe. The conveying pressure of biogas in the vertical boiler simultaneously controls the annular pipe to stir the water. When the conveying pressure of biogas increases, the annular pipe stirs the water to deflect to one side, so that the excessive biogas passes through the water seal in the annular pipe and returns to the furnace and is sent into the horizontal boiler to assist the stratified combustion of garbage; A connecting member is fixedly disposed beside the vertical boiler. One end of the connecting member is connected to a biogas supply system. An impeller is rotatably fitted in the connecting member. The annular pipe is fixedly disposed beside the vertical boiler. An air supply pipe is fixedly installed at the bottom end of the side surface of the vertical boiler. A one-way pipe is disposed between the annular pipe and the air supply pipe. One end of the one-way pipe is communicated with the lower part of the annular pipe, and the other end of the one-way pipe is communicated with the air supply pipe. One end of the one-way pipe is of an inverted V-shaped structure. Water is injected into the bottom end of the annular pipe. The water surface in the annular pipe is higher than the connection point of the annular pipe and the one-way pipe, and the water surface in the annular pipe is lower than the top end of the inverted V-shaped structure of the one-way pipe. A plurality of baffle plates are slidably fitted in the annular pipe. The baffle plates are evenly distributed in the annular pipe. The baffle plates move along the shape of the annular pipe. The baffle plates are driven by a chain. A sprocket is rotatably fitted in the annular pipe. The sprocket is engaged with the chain. A universal shaft rod is disposed between the annular pipe and the connecting member. One end of the universal shaft rod is power-connected to the sprocket, and the other end of the universal shaft rod is power-connected to the impeller. A return pipe is disposed between the annular pipe and the horizontal boiler. One end of the return pipe is communicated with the top end of the annular pipe, and the other end of the return pipe is communicated with the horizontal boiler.

2. The energy-saving boiler according to claim 1, characterized in that: The garbage treatment mechanism further includes a fixed support. A plurality of the fixed supports are fixedly installed in the horizontal boiler. The fixed supports are evenly distributed in a straight line and symmetrically distributed on both sides in the horizontal boiler. Moving support balls are movably disposed on the fixed supports. The moving support balls roll on the fixed supports. A movable support is slidably fitted in the horizontal boiler. The size of the movable support is adapted to the internal cross-sectional size of the horizontal boiler. The bottom end of the fixed support abuts against the moving support ball.

3. The energy-saving boiler according to claim 2, characterized in that: A plurality of first grate bars are rotatably fitted in the horizontal boiler. The first grate bars are evenly distributed in a straight line and are all located above the movable support. A plurality of second grate bars are rotatably fitted on the movable support. The second grate bars are evenly distributed in a straight line and are all located between the first grate bars and the movable support. The bottom surfaces of the second grate bars are adjacent to the bottom surfaces of the first grate bars. When the movable support moves, the second grate bars are driven to extend out from between the adjacent first grate bars. One side of the horizontal boiler is an open end, and garbage is placed on the first grate bars and the second grate bars from one side of the horizontal boiler.

4. The energy-saving boiler according to claim 3, wherein: A motor is fixedly arranged beside one side of the horizontal boiler. A turntable is fixedly installed on the shaft of the motor. A linkage rod is arranged on the turntable. One end of the linkage rod is rotatably fitted with the turntable. A rotating rod is arranged at the bottom end of the movable support. One end of the rotating rod is rotatably fitted with the movable support, and the other end of the rotating rod is rotatably fitted with the other end of the linkage rod.

5. The energy-saving boiler according to claim 4, wherein: A plurality of ash cleaning ports are arranged at the bottom end of one side of the horizontal boiler. The ash cleaning ports all penetrate through the wall surface of the horizontal boiler and are used for cleaning the combustion ash generated after the garbage in the horizontal boiler burns in a layer. A partition support plate is fixedly installed in the horizontal boiler. The partition support plate is located below the first grate bar at the innermost side in the horizontal boiler, and the partition support plate supports the first grate bar at the innermost side in the horizontal boiler.

6. The energy-saving boiler according to claim 5, wherein: The biogas treatment mechanism further includes a steam boiler. The top end of the vertical boiler is an open end. The steam boiler is fixedly installed at the top end of the vertical boiler. The size of the steam boiler is adapted to the size of the top end of the vertical boiler, and the vertical boiler and the steam boiler are sealed.

7. The energy-saving boiler according to claim 6, wherein: The size of the impeller is adapted to the inside of the connecting member. A valve is fixedly installed at the other end of the connecting member. One end of the valve is communicated with the connecting member. The air delivery pipe penetrates through the vertical boiler, and the air delivery pipe and the vertical boiler are sealed. One end of the air delivery pipe is communicated with the other end of the valve, and the other end of the air delivery pipe extends to the middle of the inside of the vertical boiler. A biogas spray nozzle is fixedly installed at the other end of the air delivery pipe, and the biogas spray nozzle is communicated with the other end of the air delivery pipe.

8. The energy-saving boiler according to claim 7, wherein: An igniter is fixedly installed at the bottom end inside the vertical boiler. The top end of the igniter extends above the biogas nozzle. The igniter is adjacent to the biogas nozzle and is connected to a power supply system. The igniter is used to ignite biogas. An oxygen pipe is fixedly installed on the vertical boiler. The oxygen pipe penetrates through the vertical boiler and is sealed between the oxygen pipe and the vertical boiler. One end of the oxygen pipe is connected to an oxygen supply system, and the other end of the oxygen pipe extends beside the biogas nozzle. An air port is fixedly installed at the other end of the oxygen pipe, and the air port is communicated with the oxygen pipe.

9. A method for recycling biogas in a waste treatment system, characterized in that, The energy-saving boiler according to any one of claims 1-8 is used.

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