Centralized burning device for returning straw to field

Abstract

A device for returning straw to fields and burning it in a centralized manner comprises an intelligent power supply control box, a straw conveyor, a straw feeding bin, a crushing bin, a grass shredding channel, a high-temperature combustion chamber and a chimney, wherein the straw conveyor is connected to one end of the straw feeding bin, the other end of the straw feeding bin is connected to one end of the crushing bin, the other end of the crushing bin is connected to one end of the grass shredding channel, a spiral crusher is installed in the crushing bin, the crusher comprises a variable frequency high-speed motor, one end of the grass shredding channel is connected to a feed port of a high-temperature combustion chamber, the flue outlet of the high-temperature combustion chamber is connected to the chimney, and a two-stage wet dust removal device is connected to the chimney.

Description

Technical Field

[0001] The invention relates to the technical field of farmland straw burning, in particular to a device for returning straw to fields and performing centralized burning. Background Art

[0002] The way to deal with the straw produced by agricultural production is to bundle the straw into bales and transport it to biomass power plants for power generation. However, after all, there are still few biomass power plants, and it is impossible to consume a large amount of straw. A large amount of straw will remain in the fields and cannot be processed, affecting land preparation and next year's spring farming production. To solve this problem, it can only be burned on the spot in the fields. Burning produces a large amount of smoke and PM2.5 emissions, which will cause serious atmospheric pollution in autumn and spring every year. It is currently a production and environmental protection technical problem that cannot be solved in the agricultural production process. Summary of the invention

[0003] In order to solve the deficiencies of the existing technology, the present invention provides a centralized incineration device for returning straw to the field. The centralized incineration device for returning straw to the field can not only solve the problem that a large amount of straw remaining in the field of the bio-power plant cannot be processed, but also can return a large amount of wood ash generated to the field and increase the fertility of the land, which is equivalent to returning straw to the field and effectively prevents the problem of soil desertification. The carbonized straw becomes wood ash, which is closed and collected in the wood ash collection chamber at the bottom of the high-temperature combustion chamber of the device and filtered by a two-stage wet dust collector. The flue gas that meets the emission standards is discharged into the atmosphere through a chimney, effectively solving the problem of haze pollution of the atmospheric environment caused by scattered burning of straw.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: it includes an intelligent power supply control box, a straw conveyor, a straw feeding bin, a crushing bin, a grass shredding channel, a high-temperature combustion chamber and a chimney, wherein the straw conveyor is connected to one end of the straw feeding bin, the other end of the straw feeding bin is connected to one end of the crushing bin, the other end of the crushing bin is connected to one end of the grass shredding channel, a spiral crusher is installed in the crushing bin, the crusher includes a variable frequency high-speed motor, one end of the grass shredding channel is connected to the feed port of the high-temperature combustion chamber, the flue outlet of the high-temperature combustion chamber is connected to the chimney, and the chimney is connected to a two-stage wet dust removal device;

[0005] The high-temperature combustion chamber comprises a chamber body, wherein the chamber body comprises an upper chamber cavity, a lower chamber cavity and a smoke exhaust duct, an upper grate and a lower grate are arranged between the upper chamber cavity, the lower chamber cavity and the smoke exhaust duct to form a high-temperature combustion chamber, the upper chamber cavity comprises a vent communicated with the upper chamber cavity, the vent, the upper chamber cavity comprises a partition plate connected to the chamber body, the lower chamber cavity comprises a vent communicated with the lower chamber cavity and a diesel combustion-supporting nozzle, the chamber body comprises an upper furnace door and a lower furnace door communicated with the upper chamber cavity and the lower chamber cavity, and a smoke ash cleaning port is arranged at one end of the smoke exhaust duct, a smoke exhaust duct outlet is arranged at one end of the smoke exhaust duct, a combustion chamber temperature probe is arranged on one side of the chamber body, an ash drop port is arranged on the lower side wall of the chamber body, an ash drop chamber is connected to the ash drop port at a relative position, and the chamber body is connected to a floor support leg;

[0006] The chimney comprises a flue pipe, an induced draft buffer, a variable speed induced draft fan, a first section vertical tube, a horizontal tube, a second section vertical tube, a chimney cover, and a first-stage wet dust collector and a second-stage wet dust collector. The flue pipe is connected with an induced draft buffer and a variable speed induced draft fan. The flue pipe is connected with the first section vertical tube. A first-stage wet dust collector is arranged on the first section vertical tube. The first section vertical tube is connected with one end of the horizontal tube. The other end of the horizontal tube is connected with the second section vertical tube. A second-stage wet dust collector is arranged on the second section vertical tube. The upper end of the second section vertical tube is connected with the chimney cover. The lower ends of the first section vertical tube and the second section vertical tube are provided with dust outlets. A sedimentation tank is arranged below the dust outlet.

[0007] The present invention is implemented as follows: first, the power switch in the intelligent power control box is started, and at the same time, the straw conveyor, the variable frequency high-speed motor of the crusher in the crushing bin, the induced draft buffer, the variable speed induced draft fan, the first-stage wet dust collector and the second-stage wet dust collector are in operation, and the temperature probe in the combustion chamber is in operation. At this time, the straw is bundled or picked up and scattered in the field. The straw is transported to the straw feeding bin by the straw conveyor and then pushed into the crushing bin by the straw feeding bin. The spiral crusher in the crushing bin crushes and the crushed straw is evenly distributed through the sliding channel and the partition plate onto the upper grate of the upper chamber in the high-temperature combustion chamber. At this time, the diesel combustion-supporting nozzle in the lower chamber sprays oil to ignite and ignite the straw on the upper grate of the upper chamber. The ignited straw falls into the lower chamber through the upper grate and continues to burn. During the combustion process, the vents of the upper chamber and the lower chamber are connected to the upper chamber and the lower chamber. Air is supplied in the cavity, and the temperature probe feeds back the real-time temperature in the high-temperature combustion chamber to the control valve of the fuel injector in the power control box. The control valve opens the fuel injector to spray fuel to assist combustion. When the temperature in the high-temperature combustion chamber reaches the set temperature, the control valve closes the fuel injector and stops spraying fuel. When the straw in the lower chamber cavity is burned out, the carbonized straw ash falls into the ash falling chamber through the ash falling port of the lower grate of the lower chamber cavity 32, and then is discharged through the dust discharge port of the ash falling chamber and bagged for reuse. The flue gas in the high-temperature combustion chamber enters the first vertical tube, the horizontal tube, and the second vertical tube through the exhaust duct, the induced draft buffer of the flue pipe, and the variable speed induced draft fan. At this time, the flue gas is filtered and dusted by the first-stage wet dust collector and the second-stage wet dust collector. After the flue gas collides with the chimney cover, the remaining particles in the flue gas fall back to the dust falling port at the bottom of the first and second vertical tubes of the chimney and are discharged into the sedimentation tank, and the clean flue gas is discharged into the atmosphere.

[0008] The beneficial effects of the present invention are as follows: the high-temperature combustion chamber structural design can burn the straw to the maximum extent through secondary combustion, and after being closed and cooled in the ash-falling chamber, it is bagged and reused through the dust discharge port, thereby preventing dust leakage from polluting the environment. The setting of the induced draft buffer of the chimney effectively prevents the chimney return air from directly entering the flue and causing wind blockage and obstruction of smoke discharge. The structural design of the chimney flue tube, the first section vertical tube, the horizontal tube, the second section vertical tube, the chimney cover and the two-stage wet dust collector can achieve the effect of effectively separating the flue gas and dust. The chimney cover of the chimney can achieve the effect of sinking the smoke and dust particles contained in the final smoke. The dust-falling ports arranged at the lower parts of the first section vertical tube and the second section vertical tube can discharge the smoke and dust particles separated by the two-stage wet dust collector and the chimney cover into the sedimentation tank for sedimentation and reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 , is a structural view of the invention;

[0010] Figure 2 , is a structural view of the high temperature combustion chamber of the present invention;

[0011] The present invention is further described below in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0012] The specific implementation of the present invention is, comprising an intelligent power supply control box 2, a straw conveyor 1, a straw feeding bin 3, a crushing bin 6, a grass shredding channel 7, a high temperature combustion chamber 9 and a chimney, wherein the straw conveyor 1 is connected to one end of the straw feeding bin 3, the other end of the straw feeding bin 3 is connected to one end of the crushing bin 6, the other end of the crushing bin 6 is connected to one end of the grass shredding channel 7, a spiral crusher 5 is installed in the crushing bin 6, the crusher 5 comprises a variable frequency high speed motor 4, one end of the grass shredding channel 7 is connected to a feed port 28 of a high temperature combustion chamber 9, a flue outlet 35 of the high temperature combustion chamber 8 is connected to a chimney, and a two-stage wet dust removal device 13 and 17 are connected to the chimney;

[0013] The high temperature combustion chamber 8 comprises a chamber body 39, wherein the chamber body 39 has an upper chamber cavity 29, a lower chamber cavity 32, and a smoke exhaust duct 36, wherein an upper grate 31 and a lower grate 37 are arranged between the upper chamber cavity 29, the lower chamber cavity 32, and the smoke exhaust duct 36, forming a high temperature combustion chamber 9, wherein the upper chamber cavity 29 has a vent 30 communicating with the upper chamber cavity 29, the vent 30, the upper chamber cavity 29 has a partition plate 8 connected to the chamber body 39, and the lower chamber cavity 32 has a vent 31 communicating with the lower chamber cavity 32. 3 and a diesel combustion-supporting nozzle 34, the chamber body 39 is provided with an upper furnace door 27 and a lower furnace door 26 communicating with the upper chamber cavity 29 and the lower chamber cavity 32, and one end of the exhaust duct 36 is provided with a flue ash cleaning port 25, one end of the exhaust duct 36 is provided with a flue ash outlet 35, one side of the chamber body 39 is provided with a combustion chamber temperature probe 10, the lower side wall of the chamber body 39 is provided with an ash drop port 38, the relative position of the ash drop port 38 is connected to the ash drop chamber 23, and the chamber body 39 is connected to a landing leg 24;

[0014] The chimney comprises a flue pipe 19, an induced draft buffer 21, a variable speed induced draft fan 20, a first section vertical tube 16, a transverse tube 14, a second section vertical tube 12, a chimney cover 11, and a first-stage wet dust collector 17 and a second-stage wet dust collector 13. The flue pipe 19 is connected with an induced draft buffer 21 and a variable speed induced draft fan 20. The flue pipe 19 is connected with the first section vertical tube 16. The first-stage wet dust collector 17 is arranged on the first section vertical tube 16. The first section vertical tube 16 is connected with one end of the transverse tube 14. The other end of the transverse tube 14 is connected with the second section vertical tube 12. The second section vertical tube 12 is arranged with a second-stage wet dust collector 13. The upper end of the second section vertical tube 12 is connected with the chimney cover 11. The lower ends of the first section vertical tube 16 and the second section vertical tube 12 are provided with dust outlets 40 and 15. A sedimentation tank 18 is arranged below the dust outlets 40 and 15.

[0015] The implementation method of the present invention is as follows: first, the power switch in the intelligent power control box 2 is turned on, and at the same time, the variable frequency high-speed motor 4 of the straw conveyor 1, the crusher 5 in the crushing bin 6, the induced draft buffer 21, the variable speed induced draft fan 20 are in operation, the first-stage wet dust collector 17 and the second-stage wet dust collector 13 are in operation, and the temperature probe 10 in the combustion chamber 9 is in operation. At this time, the straw bundles or the straw scattered in the field are transported by the straw conveyor 1 into the straw feeding bin 3, and then pushed into the crushing bin by the straw feeding bin 3. 6. The crushed straws are crushed by the spiral crusher 5 in the crushing bin 6 and are evenly distributed on the upper grate 31 of the upper chamber 29 in the high-temperature combustion chamber 9 through the sliding channel 7 and the partition plate 8. At this time, the diesel combustion-supporting nozzle 34 in the lower chamber 32 sprays oil to ignite and ignite the straws on the upper grate 31 of the upper chamber 29. The ignited straws fall into the lower chamber 32 through the upper grate 31 and continue to burn. During the combustion process, the vents 30 and 33 of the upper chamber 29 and the lower chamber 32 are ventilated to the upper chamber 29 and the lower chamber 32. The temperature probe 10 feeds back the real-time temperature in the high-temperature combustion chamber 8 to the control valve of the fuel injector 10 in the power control box 2, and the control valve opens the fuel injector 10 to spray fuel to assist combustion. When the temperature in the high-temperature combustion chamber 8 reaches the set temperature, the control valve closes the fuel injector 10 to stop spraying fuel. When the straw in the lower chamber 32 is burned out, the carbonized straw ash falls into the ash falling chamber 23 through the ash falling port 38 of the lower grate 37 of the lower chamber 32, and then is discharged through the dust discharge port 22 of the ash falling chamber 23 for reuse. The flue gas in the combustion chamber 9 enters the first vertical tube 16, the horizontal tube 14 and the second vertical tube 12 through the exhaust duct 36, the induced draft buffer 21 of the flue tube 19 and the variable speed induced draft fan 20. At this time, the flue gas is filtered and dusted by the first-stage wet dust collector 17 and the second-stage wet dust collector 13. After the flue gas collides with the chimney cover 11, the remaining particles in the flue gas fall back to the dust outlets 40 and 15 at the bottom of the first vertical tube 16 and the second vertical tube 12 of the chimney and are discharged into the sedimentation tank 18, and the clean flue gas is discharged into the atmosphere.

Claims

1. A straw return and centralized burning device, comprising an intelligent power supply control box, a straw conveyor, a straw feeding bin, a crushing bin, a straw shredding channel, a high-temperature combustion chamber and a chimney, characterized in that: The conveyor is connected to one end of the straw feeding bin, the other end of the straw feeding bin is connected to one end of the crushing bin, the other end of the crushing bin is connected to one end of the grass shredding channel, a spiral crusher is installed in the crushing bin, the crusher includes a variable frequency high-speed motor, one end of the grass shredding channel is connected to the feed port of the high-temperature combustion chamber, the flue outlet of the high-temperature combustion chamber is connected to the chimney, and the chimney is connected to a two-stage wet dust removal device; the high-temperature combustion chamber includes a chamber body, the chamber body has an upper chamber cavity, a lower chamber cavity, and a smoke exhaust duct, an upper grate and a lower grate are arranged between the upper chamber cavity, the lower chamber cavity and the smoke exhaust duct to form a high-temperature combustion chamber, the upper chamber cavity has a vent communicated with the upper chamber cavity, the vent, the upper chamber cavity has a partition connected to the chamber body, the lower chamber cavity has a vent communicated with the lower chamber cavity and a diesel combustion-supporting nozzle, the chamber body has an upper furnace door, a lower furnace door and the smoke exhaust duct communicated with the upper chamber cavity and the lower chamber cavity One end of the duct is provided with a flue cleaning port, one end of the smoke exhaust duct is provided with a smoke exhaust duct outlet, one side of the chamber body is provided with a combustion chamber temperature probe, a lower side wall of the chamber body is provided with an ash dropping port, the relative position of the ash dropping port is connected with an ash dropping chamber, and the chamber body is connected with a floor-standing leg; the chimney comprises a flue pipe, an induced draft buffer, a variable speed induced draft fan, a first section vertical cylinder, a horizontal cylinder, a second section vertical cylinder, a chimney cover and a first-stage wet dust collector and a second-stage wet dust collector, the flue pipe is connected with an induced draft buffer and a variable speed induced draft fan, the flue pipe is connected to the first section vertical cylinder, a first-stage wet dust collector is arranged on the first section vertical cylinder, the first section vertical cylinder is connected to one end of the horizontal cylinder, the other end of the horizontal cylinder is connected to the second section vertical cylinder, a second-stage wet dust collector is arranged on the second section vertical cylinder, the upper end of the second section vertical cylinder is connected to the chimney cover, the lower ends of the first section vertical cylinder and the second section vertical cylinder have dust dropping ports, and a sedimentation tank is arranged below the dust dropping port.

2. The straw return to field centralized burning device according to claim 1 is characterized in that: The device for centralized burning of straw returning to the field is realized as follows: first, the power switch in the intelligent power control box is started, and at the same time, the variable frequency high-speed motor of the straw conveyor, the crusher in the crushing bin, the induced draft buffer, the variable speed induced draft fan, the first-stage wet dust collector and the second-stage wet dust collector are in operation, and the temperature probe in the combustion chamber is in operation. At this time, the straw bundles or the straw picked up and scattered in the field are transported to the straw feeding bin by the straw conveyor, and then pushed into the crushing bin by the straw feeding bin. The spiral crusher in the crushing bin crushes and the crushed straw is evenly distributed through the sliding channel and the partition plate onto the upper grate of the upper chamber in the high-temperature combustion chamber. At this time, the diesel combustion-supporting nozzle in the lower chamber sprays oil to ignite and ignite the straw on the upper grate of the upper chamber. The ignited straw falls into the lower chamber through the upper grate and continues to burn. During the combustion process, the vents of the upper chamber and the lower chamber are ventilated to the upper chamber. The temperature probe feeds back the real-time temperature in the high-temperature combustion chamber to the control valve of the fuel injector in the power control box, and the control valve opens the fuel injector to inject fuel to assist combustion. When the temperature in the high-temperature combustion chamber reaches the set temperature, the control valve closes the fuel injector to stop injecting fuel. When the straw in the lower chamber is completely burned, the carbonized straw ash falls into the ash falling chamber through the ash falling opening of the lower grate of the lower chamber (32), and then is discharged through the dust discharge opening of the ash falling chamber and bagged for reuse. The flue gas in the high-temperature combustion chamber passes through the flue gas exhaust duct, the induced draft buffer of the flue pipe, and the variable speed induced draft fan and enters the first section vertical tube, the horizontal tube, and the second section vertical tube. At this time, the flue gas is filtered and dusted by the first stage wet dust collector and the second stage wet dust collector. After the flue gas collides with the chimney cover, the remaining particles in the flue gas fall back to the dust discharge opening at the bottom of the first section vertical tube and the second section vertical tube of the chimney and are discharged into the sedimentation tank. The clean flue gas is discharged into the atmosphere.

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