CN111637483A

CN111637483A - Environment-friendly treatment method for agricultural straw

Info

Publication number: CN111637483A
Application number: CN202010546695.9A
Authority: CN
Inventors: 康文平
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2020-09-08

Abstract

The invention discloses an environment-friendly treatment method of agricultural straws, extruded and shaped straw powder falls into a combustion box, then a piston rod of a second air cylinder pushes a sliding block, a baffle plate seals the bottom of a briquetting box, the extruded and shaped straw powder enters a combustion chamber through the guide of a guide cavity, an air blower is started, the air blower blows air into a first air pipe and a second air pipe through an air gathering sleeve, the first air pipe blows air into the guide cavity, the second air pipe blows air into the combustion chamber, an igniter is started, steam of an external steam engine is introduced into the combustion chamber through a steam inlet pipe, waste gas generated in the straw combustion process enters a waste gas treatment box through a waste gas outlet pipe, the extruded and shaped straw conveniently enters the combustion box through the design of the baffle plate capable of being automatically pulled, meanwhile, the bottom of the briquetting box is closed during combustion, and waste gas in the combustion process is prevented from being discharged into the briquetting box, solves the technical problem of low combustion efficiency in the straw combustion process in the prior art.

Description

Environment-friendly treatment method for agricultural straw

Technical Field

The invention relates to the technical field of straw treatment, in particular to an environment-friendly treatment method of agricultural straws.

Background

The straw is a general term of stem leaf (ear) part of mature crops. Typically refers to the remainder of the wheat, rice, corn, potatoes, oilseed rape, cotton, sugar cane and other crops (typically roughages) after harvesting the seed. During summer harvest and autumn and winter each year, a large amount of straws of wheat, corn and the like are produced, according to relevant statistics, as a big agricultural country, China can generate more than 7 hundred million tons of straws every year, and the straws become wastes which are not useful but need to be disposed.

Previously, straw could be directly incinerated or used as a source of energy for rural households. However, the straw is burnt in the field to generate a large amount of dense smoke, which not only becomes a bottleneck problem of rural environment protection, but also even becomes a main cause of compromising the urban environment. With the enhancement of the national environmental protection policy, open-air straw burning is forbidden, the original open-air straw burning mode in the countryside is forbidden in all the places and the countryside, and farmers face the difficult problem of straw treatment year by year. Patent document (CN 201911153764.3) discloses a straw combustion device, which integrally adopts a complete set of combustion device from preheating-conveying-cutting-combustion process flow, is suitable for being used in villages and towns, and solves the problem of large-volume straw conveying. Utilize the flue gas waste heat backward flow of burning, preheat the straw, reduce straw humidity, improved straw combustion efficiency, but the straw quantity that this straw combustion apparatus can burn simultaneously is limited, and is not high to the treatment effeciency of straw, and the device is not ideal to the exhaust gas particle treatment effect that produces in the straw combustion process simultaneously.

Disclosure of Invention

The invention aims to provide an environment-friendly treatment method of agricultural straws, which solves the following technical problems: (1) straw enters the crushing box through entering the box hopper, the first motor is started, the first motor output shaft drives the driving rod to rotate, the two driving rods connected through two gears in a meshed mode drive the crushing pieces on the surface to rotate, the crushing pieces are matched with the fixing pieces to crush the straw, the crushed straw powder enters the fixing box and enters the conveying pipe through the fixing box, the second motor is started, the second motor output shaft is driven by the electric conveying screw to rotate, the conveying screw conveys the straw powder in the conveying pipe, the straw powder is conveyed into the briquetting box, the first cylinder piston rod drives the shaping plate to extrude and shape the straw powder in the briquetting box, through the structural arrangement, the combustion device can crush the straw before the straw is combusted, the crushed straw is prevented from entering the briquetting box through the conveying screw from being blocked, and meanwhile, the straw is briquetted, more straws can be combusted in the subsequent combustion chamber simultaneously, the density of the straws is increased simultaneously, the straw combustion is more sufficient, and the technical problem that the straw treatment efficiency is not high due to the limited number of the straws which can be combusted simultaneously in the combustion chamber in the straw combustion process in the prior art is solved; (2) the sliding block is pulled through the contraction of a second cylinder piston rod, the sliding block is pulled out, the extruded and shaped straw powder falls into the combustion box, then the second cylinder piston rod pushes the sliding block, the bottom of the briquetting box is sealed by the baffle, the extruded and shaped straw powder enters the combustion chamber through the guide of the guide cavity, the air blower is started, the air blower blows air into the first air pipe and the second air pipe through the air gathering sleeve, the air is blown into the guide cavity by the first air pipe, the air is blown into the combustion chamber by the second air pipe, the igniter is started, the steam of an external steam engine is connected into the combustion chamber by the steam inlet pipe, the waste gas generated in the straw combustion process enters the waste gas treatment box through the waste gas outlet pipe, the extruded and shaped straw conveniently enters the combustion box through the design of the baffle capable of automatically pulling, the bottom of the briquetting box is sealed during the combustion, and the waste gas in the combustion process is prevented from being discharged into, the technical problem that the combustion efficiency is low in the straw combustion process in the prior art is solved; (3) powder that produces among the straw combustion process falls into and stores up the ash intracavity, the water of inlet tube in with outside water tank inserts and stores up the ash intracavity, the straw ash is dissolved in the aquatic, waste gas gets into the exhaust-gas treatment incasement and is filtered by the exhaust-gas filter net, simultaneously water pump cooperation circulative cooling pipe condenses the granule that the exhaust-gas filter net is not abundant filterable, the granule falls into the basin, the air pump extracts the waste gas after filtering, and discharge the exhaust-gas treatment incasement again through the U-shaped pipe, open the ooff valve on the outlet duct after filtering repeatedly, discharge the gas of exhaust-gas treatment incasement, through the design of circulative cooling pipe and basin, the granule that does not fully filterable by the exhaust-gas filter net in the waste gas after can the straw burning can cool down the liquefaction, fall into the basin, the treatment effeciency of waste gas is improved, can multiple cycle handle waste gas simultaneously, the treatment effect to waste gas is good, solve among the prior art granule in the And (5) problems are solved.

The purpose of the invention can be realized by the following technical scheme:

an environment-friendly treatment method of agricultural straws adopts the following combustion devices: comprises a crushing box, a conveying pipe, a briquetting box and a combustion box, wherein a box hopper is arranged at the top of the crushing box, two driving rods are arranged in the crushing box, a plurality of crushing sheets are arranged on the driving rods, a fixing box is arranged below the crushing box and is communicated with the conveying pipe, a conveying screw rod is arranged in the conveying pipe, one end of the conveying pipe, away from a second motor, is communicated with the side wall of the briquetting box, four fixing rods are arranged at the top of the briquetting box and are fixed on the lower surface of a top plate, a first air cylinder is arranged on the upper surface of the top plate, a shaping plate is arranged at the end part of a piston rod of the first air cylinder, the shaping plate movably penetrates through the top of the briquetting box, a baffle plate movably penetrates through one side of the briquetting box, a sliding block is arranged at one side of, the piston rod of the second air cylinder penetrates through the fixed plate to be connected with the sliding block, the briquetting box is installed on the combustion box, the top of the inner cavity of the combustion box is provided with a guide cavity, the side wall of the guide cavity is communicated with a first air pipe, the lower part of the guide cavity is provided with a combustion chamber, the side wall of the combustion chamber is communicated with a second air pipe, the side wall of the combustion chamber is communicated with a steam inlet pipe and an exhaust gas outlet pipe, the inner cavity of the combustion chamber is provided with an igniter, one end of the exhaust gas outlet pipe, which is far away from the combustion box, is connected with the side wall of the exhaust gas treatment box, the exhaust gas outlet pipe is communicated with the side wall of the exhaust gas treatment box, the inner cavity of the exhaust gas treatment box is provided with an exhaust gas filter screen, the inner cavity of the exhaust, the air pump exhaust port is communicated with the partition plate through a pipe fitting, a U-shaped pipe is installed on the air pump exhaust port, one end, away from the air pump, of the U-shaped pipe is communicated with the inner wall of the waste gas treatment box, an air outlet pipe is installed on the side wall of the waste gas treatment box, the air outlet pipe is arranged below the waste gas outlet pipe, the air outlet pipe is communicated with the side wall of the waste gas treatment box, an ash storage cavity is formed in the bottom of the combustion box, a water inlet pipe is installed at a position, close;

the inner walls of two sides of the crushing box are provided with a plurality of fixing pieces, the crushing pieces are arranged between two adjacent fixing pieces on the same side, the bottom of the box hopper is communicated with the top of the crushing box, and the crushing pieces are arranged on the driving rod at equal intervals;

the conveying pipe penetrates through the fixing box, four fixing rods are respectively installed at four corner positions of the top of the briquetting box, the same sides of the two driving rods penetrate through the side wall of the crushing box, gears are sleeved on the driving rods and meshed and connected with each other, the two gears are arranged in the side shell, the side shell is fixed on the side wall of the crushing box, a first motor is installed on the side shell, and an output shaft of the first motor is connected with one of the driving rods;

the first air pipe and the second air pipe are both communicated with an air gathering sleeve, the air gathering sleeve is arranged at an air outlet of a blower, and the blower is fixed on the outer side wall of the combustion box;

the working process of the combustion device is as follows:

the method comprises the following steps: putting straws into a crushing box from a box hopper, enabling the straws to enter the crushing box through the box hopper, starting a first motor, enabling an output shaft of the first motor to drive a driving rod to rotate, driving crushing pieces on the surface to rotate through two driving rods of two gears in meshed connection, enabling the crushing pieces to be matched with a fixing piece to crush the straws, enabling crushed straw powder to enter a fixing box, enabling the crushed straw powder to enter a conveying pipe through the fixing box, starting a second motor, enabling an output shaft of the second motor to rotate an electric conveying screw rod, conveying the straw powder in the conveying pipe through the conveying screw rod, and conveying the straw powder into a briquetting box;

step two: the method comprises the following steps that a first air cylinder is started, a piston rod of the first air cylinder drives a shaping plate to extrude and shape straw powder in a briquetting box, then a second air cylinder is started, a piston rod of the second air cylinder contracts to pull a sliding block, the sliding block further pulls a baffle plate out, the extruded and shaped straw powder falls into a combustion box, then a piston rod of the second air cylinder pushes the sliding block, the bottom of the briquetting box is sealed by the baffle plate, the extruded and shaped straw powder enters a combustion chamber through the guide cavity, an air blower is started, the air blower blows air into a first air pipe and a second air pipe through an air gathering sleeve, the air blows air into the guide cavity through the first air pipe, the second air pipe blows air into the combustion chamber, an igniter is started, steam enters an external steam engine into the combustion chamber through a steam inlet pipe, and waste gas generated in the straw combustion process enters;

step three: the powder that produces among the straw combustion process falls into and stores up the ash intracavity, the water of inlet tube in with outside water tank inserts and stores up the ash intracavity, the straw ash is dissolved in the aquatic, waste gas gets into the exhaust-gas treatment incasement and is filtered by the exhaust gas filter screen, water pump cooperation circulative cooling pipe condenses the not abundant filterable granule of exhaust gas filter screen simultaneously, the granule falls into the basin, the air pump extracts the waste gas after filtering, and discharge exhaust-gas treatment incasement again through the U-shaped pipe, open the ooff valve on the outlet duct after filtering repeatedly, with the gaseous discharge of exhaust-gas treatment incasement.

Furthermore, the waste gas outlet pipe is arranged right below the steam inlet pipe, and the igniter is fixed on the inner wall of the combustion chamber.

Further, the two sides of the baffle are symmetrically provided with grooves, the inner walls of the two sides of the pressing block box are symmetrically provided with convex strips, the convex strips are in sliding connection with the grooves, and the bottom of the pressing block box is communicated with the top of the combustion box.

Furthermore, two fixed plates are arranged at two ends of one side of each fixed plate, and the water tank is arranged at the bottom of the inner cavity of the waste gas treatment box.

Furthermore, the circulating cooling pipe is arranged on a cooling water pump, and the cooling water pump is arranged on the top of the inner wall of the waste gas treatment box.

Further, all install the ooff valve on outlet duct, steam inlet pipe, waste gas exit tube, the inlet tube, the external steam engine of steam inlet pipe, the outer water tank that connects of inlet tube.

The invention has the beneficial effects that:

(1) the invention relates to an environment-friendly processing method of agricultural straws, straws enter a crushing box through a box hopper, a first motor is started, an output shaft of the first motor drives a driving rod to rotate, two driving rods of two gears which are meshed and connected drive a crushing sheet on the surface to rotate, the crushing sheet is matched with a fixing sheet to crush the straws, the crushed straw powder enters a fixing box and enters a conveying pipe through the fixing box, a second motor is started, an output shaft of the second motor drives a conveying screw to rotate, the conveying screw conveys the straw powder in the conveying pipe, the straw powder is conveyed into a briquetting box, a first cylinder piston rod drives a shaping plate to extrude and shape the straw powder in the briquetting box, through the structural arrangement, the combustion device carries out crushing processing before the combustion of the straws, the crushed straws are prevented from entering the briquetting box to be blocked through the conveying screw, meanwhile, more straws can be combusted in the subsequent combustion chamber simultaneously by briquetting treatment of the straws, and the density of the straws is increased, so that the straws are combusted more fully;

(2) the sliding block is pulled through the contraction of a second cylinder piston rod, the sliding block is pulled out, the extruded and shaped straw powder falls into the combustion box, then the second cylinder piston rod pushes the sliding block, the bottom of the briquetting box is sealed by the baffle, the extruded and shaped straw powder enters the combustion chamber through the guide of the guide cavity, the air blower is started, the air blower blows air into the first air pipe and the second air pipe through the air gathering sleeve, the air is blown into the guide cavity by the first air pipe, the air is blown into the combustion chamber by the second air pipe, the igniter is started, the steam of an external steam engine is connected into the combustion chamber by the steam inlet pipe, the waste gas generated in the straw combustion process enters the waste gas treatment box through the waste gas outlet pipe, the extruded and shaped straw conveniently enters the combustion box through the design of the baffle capable of automatically pulling, the bottom of the briquetting box is sealed during the combustion, and the waste gas in the combustion process is prevented from being discharged into, meanwhile, the combustion efficiency of the straws is effectively improved through the design of the first air pipe, the second air pipe and the steam inlet pipe;

(3) powder produced in the straw combustion process falls into an ash storage cavity, water in an external water tank is connected into the ash storage cavity by a water inlet pipe, straw ash is dissolved in water, waste gas enters a waste gas treatment box and is filtered by a waste gas filter screen, meanwhile, a water pump is matched with a circulating cooling pipe to condense particles which are not fully filtered by the waste gas filter screen, the particles fall into a water tank, an air pump extracts the filtered waste gas and discharges the waste gas into the waste gas treatment box again through a U-shaped pipe, a switch valve on an air outlet pipe is opened after the waste gas is repeatedly filtered, gas in the waste gas treatment box is discharged, through the design of the circulating cooling pipe and the water tank, the particles which are not fully filtered by the waste gas filter screen in the waste gas after the straw combustion can be cooled and liquefied and fall into the water tank, the treatment efficiency of the waste gas is improved, meanwhile, the waste gas can be treated by multiple, the straw burnt into ash can be collected conveniently.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of a combustion apparatus according to the present invention;

FIG. 2 is an internal structural view of the crushing box of the present invention;

FIG. 3 is an internal structural view of the delivery pipe of the present invention;

FIG. 4 is an installation view of the shredder plate of the present invention;

FIG. 5 is an internal structural view of a briquetting chamber of the present invention;

FIG. 6 is an installation view of the baffle of the present invention;

FIG. 7 is an internal structural view of the combustion case of the present invention;

FIG. 8 is a view showing the internal structure of the exhaust gas treating tank of the present invention.

In the figure: 1. a crushing box; 2. a delivery pipe; 3. a briquetting box; 4. a combustion box; 5. entering a box hopper; 6. crushing the slices; 7. a fixing sheet; 8. a drive rod; 9. a side housing; 10. a first motor; 11. a fixing box; 12. a second motor; 13. a conveying screw; 14. fixing the rod; 15. a top plate; 16. a first cylinder; 17. shaping plates; 18. a baffle plate; 19. a slider; 20. a side plate; 21. a fixing plate; 22. a second cylinder; 23. a convex strip; 25. a guide cavity; 26. a first air duct; 27. a second air duct; 28. a blower; 281. a wind gathering sleeve; 29. a combustion chamber; 30. a steam inlet pipe; 31. an exhaust gas outlet pipe; 32. an igniter; 33. a waste gas treatment tank; 34. an exhaust gas filter screen; 35. a water tank; 36. a circulating cooling pipe; 37. a partition plate; 38. an air pump; 39. a U-shaped tube; 40. an air outlet pipe; 41. a water inlet pipe; 42. an ash storage cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the invention is an environment-friendly processing method of agricultural straw, which adopts a combustion processing mode, the combustion device comprises a crushing box 1, a conveying pipe 2, a briquetting box 3 and a combustion box 4, the top of the crushing box 1 is provided with a box hopper 5, the crushing box 1 is internally provided with two driving rods 8, the driving rods 8 are provided with a plurality of crushing sheets 6, the lower part of the crushing box 1 is provided with a fixed box 11, the fixed box 11 is communicated with the conveying pipe 2, the conveying pipe 2 is internally provided with a conveying screw 13, one end of the conveying pipe 2 far away from a second motor 12 is communicated with the side wall of the briquetting box 3, the top of the briquetting box 3 is provided with four fixed rods 14, the four fixed rods 14 are fixed on the lower surface of a top plate 15, the upper surface of the top plate 15 is provided with a first cylinder 16, the end part of a piston rod of the first cylinder, a sliding block 19 is arranged on one side of the baffle 18, the sliding block 19 is arranged between the two side plates 20 in a sliding manner, the two side plates 20 are fixedly connected with a fixing plate 21, a second air cylinder 22 is arranged on the fixing plate 21, a piston rod of the second air cylinder 22 penetrates through the fixing plate 21 to be connected with the sliding block 19, the briquetting box 3 is arranged on the combustion box 4, a guide cavity 25 is arranged at the top of the inner cavity of the combustion box 4, the side wall of the guide cavity 25 is communicated with a first air pipe 26, a combustion chamber 29 is arranged below the guide cavity 25, the side wall of the combustion chamber 29 is communicated with a second air pipe 27, the side wall of the combustion chamber 29 is communicated with a steam inlet pipe 30 and an exhaust gas outlet pipe 31, an igniter 32 is arranged in the inner cavity of the combustion chamber 29, one end, away from the combustion box 4, of the exhaust gas outlet pipe, be provided with circulative cooling pipe 36 above basin 35, exhaust-gas treatment case 33 inner chamber is provided with air pump 38, air pump 38 is installed in exhaust-gas treatment case 33 inner chamber bottom, be provided with division board 37 between air pump 38 and the basin 35, air pump 38 extraction opening passes through pipe fitting intercommunication division board 37, install U-shaped pipe 39 on the air pump 38 gas vent, U-shaped pipe 39 keeps away from air pump 38 one end intercommunication exhaust-gas treatment case 33 inner wall, outlet duct 40 is installed to exhaust-gas treatment case 33 lateral wall, outlet duct 40 sets up in exhaust-gas outlet pipe 31 below, outlet duct 40 intercommunication exhaust-gas treatment case 33 lateral wall, 4 bottoms of burning box are provided with storage ash cavity 42, inlet tube 41 is installed near the bottom position to burning box 4 lateral.

Specifically, smash 1 both sides inner wall of case and all be provided with a plurality of stationary blades 7, smash piece 6 and set up between two adjacent stationary blades 7 of homonymy, go into the case and fight 5 bottoms intercommunication and smash 1 tops of case, a plurality of crushing pieces 6 equidistant installation on actuating lever 8. Conveyer pipe 2 runs through fixed box 11, and four dead levers 14 are installed respectively in briquetting case 3 top corner position all around, and two actuating levers 8 homonymies run through crushing case 1 lateral wall, and the cover is equipped with the gear on the actuating lever 8, and two gear engagement connect, and two gears set up in side casing 9, and side casing 9 is fixed in crushing case 1 lateral wall, installs first motor 10 on side casing 9, and first motor 10 output shaft is connected one of them actuating lever 8. An exhaust gas outlet pipe 31 is provided directly below the steam inlet pipe 30, and an igniter 32 is fixed to the inner wall of the combustion chamber 29. The first air duct 26 and the second air duct 27 are both communicated with an air collecting sleeve 281, the air collecting sleeve 281 is installed at an air outlet of the blower 28, and the blower 28 is fixed on the outer side wall of the combustion box 4. The recess has been seted up to 18 bilateral symmetry of baffle, and the sand grip 23 is installed to briquetting case 3 both sides inner wall symmetry, and sand grip 23 sliding connection recess, briquetting case 3 bottom intercommunication combustion box 4 tops. The two fixing plates 21 are disposed at two ends of one side of the fixing plate 21, and the water tank 35 is mounted at the bottom of the inner cavity of the exhaust gas treatment tank 33. The circulating cooling pipe 36 is installed on a cooling water pump, and the cooling water pump is installed on the top of the inner wall of the exhaust gas treatment tank 33. Switch valves are arranged on the air outlet pipe 40, the steam inlet pipe 30, the waste gas outlet pipe 31 and the water inlet pipe 41, the steam inlet pipe 30 is externally connected with a steam engine, and the water inlet pipe 41 is externally connected with a water tank.

Referring to fig. 1-8, the working process of the method for environmentally friendly processing of agricultural straw according to the present embodiment is as follows:

the method comprises the following steps: putting straws into a box hopper 5, enabling the straws to enter a crushing box 1 through the box hopper 5, starting a first motor 10, enabling an output shaft of the first motor 10 to drive a driving rod 8 to rotate, driving a crushing sheet 6 on the surface to rotate through two driving rods 8 of two gears which are connected in a meshed mode, enabling the crushing sheet 6 to be matched with a fixing sheet 7 to crush the straws, enabling crushed straw powder to enter a fixing box 11, enabling the crushed straw powder to enter a conveying pipe 2 through the fixing box 11, starting a second motor 12, enabling an output shaft of the second motor 12 to rotate an electric conveying screw 13, conveying the straw powder in the conveying pipe 2 through the conveying screw 13, and conveying the straw powder into a briquetting box 3;

step two: the first cylinder 16 is started, the piston rod of the first cylinder 16 drives the shaping plate 17 to extrude and shape the straw powder in the briquetting box 3, then, the second cylinder 22 is started, the piston rod of the second cylinder 22 retracts to pull the slide block 19, then the slide block 19 pulls out the baffle 18, the extruded and shaped straw powder falls into the combustion box 4, then a piston rod of a second air cylinder 22 pushes a sliding block 19, the bottom of the briquetting box 3 is sealed by a baffle plate 18, extruded and shaped straw powder is guided into a combustion chamber 29 through a guide cavity 25, an air blower 28 is started, the air blower 28 blows air into a first air pipe 26 and a second air pipe 27 through an air gathering sleeve 281, the first air pipe 26 blows air into the guide cavity 25, the second air pipe 27 blows air into the combustion chamber 29, an igniter 32 is started, steam enters a pipe 30 to connect external steam engine steam into the combustion chamber 29, and waste gas generated in the straw combustion process enters a waste gas treatment box 33 through a waste gas outlet pipe 31;

step three: the powder that produces among the straw combustion process falls into storage ash chamber 42, water in inlet tube 41 in with outside water tank inserts in storage ash chamber 42, the straw ash is dissolved in aquatic, waste gas gets into and is filtered by exhaust gas filter screen 34 in the exhaust-gas treatment case 33, water pump cooperation circulative cooling pipe 36 condenses the granule that exhaust gas filter screen 34 is not abundant filterable simultaneously, the granule falls into the basin 35, air pump 38 extracts the waste gas after filtering, and discharge into exhaust-gas treatment case 33 again through U-shaped pipe 39 in, open the ooff valve on the outlet duct 40 after filtering repeatedly, with the gaseous emission in the exhaust-gas treatment case 33.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.

Claims

1. An environment-friendly treatment method of agricultural straws is characterized by adopting the following combustion devices: comprises a crushing box (1), a conveying pipe (2), a briquetting box (3) and a combustion box (4), wherein the top of the crushing box (1) is provided with a box hopper (5), two driving rods (8) are arranged in the crushing box (1), a plurality of crushing sheets (6) are arranged on the driving rods (8), a fixing box (11) is arranged below the crushing box (1), the fixing box (11) is communicated with the conveying pipe (2), a conveying screw rod (13) is arranged in the conveying pipe (2), one end of the conveying pipe (2) far away from a second motor (12) is communicated with the side wall of the briquetting box (3), four fixing rods (14) are arranged at the top of the briquetting box (3), the four fixing rods (14) are fixed on the lower surface of a top plate (15), a first air cylinder (16) is arranged on the upper surface of the top plate (15), and a shaping plate (17) is arranged, it runs through briquetting case (3) top to finalize the design board (17) activity, and briquetting case (3) one side activity runs through has baffle (18), sliding block (19) are installed to baffle (18) one side, sliding block (19) slide to be set up between two curb plates (20), and two curb plates (20) fixed connection fixed plates (21), install second cylinder (22) on fixed plate (21), second cylinder (22) piston rod runs through fixed plate (21) and connects sliding block (19), install on combustion box (4) briquetting case (3), combustion box (4) inner chamber top is provided with direction chamber (25), direction chamber (25) lateral wall intercommunication has first tuber pipe (26), direction chamber (25) below is provided with combustion chamber (29), combustion chamber (29) lateral wall intercommunication has second tuber pipe (27), combustion chamber (29) lateral wall intercommunication has steam to advance pipe (30), An exhaust gas outlet pipe (31), an igniter (32) is arranged in an inner cavity of the combustion chamber (29), the exhaust gas outlet pipe (31) is far away from one end of the combustion chamber (4) and is connected with an exhaust gas treatment chamber (33) side wall, the exhaust gas outlet pipe (31) is communicated with the exhaust gas treatment chamber (33) side wall, an exhaust gas filter screen (34) is installed in the inner cavity of the exhaust gas treatment chamber (33), a water tank (35) is arranged in the inner cavity of the exhaust gas treatment chamber (33), a circulating cooling pipe (36) is arranged above the water tank (35), an air pump (38) is arranged in the inner cavity of the exhaust gas treatment chamber (33), a separation plate (37) is arranged between the air pump (38) and the water tank (35), an air pumping hole of the air pump (38) is communicated with the separation plate (37) through a pipe fitting, and a U-, one end, far away from the air pump (38), of the U-shaped pipe (39) is communicated with the inner wall of the waste gas treatment box (33), an air outlet pipe (40) is installed on the side wall of the waste gas treatment box (33), the air outlet pipe (40) is arranged below the waste gas outlet pipe (31), the air outlet pipe (40) is communicated with the side wall of the waste gas treatment box (33), an ash storage cavity (42) is formed in the bottom of the combustion box (4), a water inlet pipe (41) is installed on the side wall, close to the bottom, of the combustion box (4), and the water inlet pipe (41) is communicated with;

the inner walls of two sides of the crushing box (1) are respectively provided with a plurality of fixing pieces (7), the crushing pieces (6) are arranged between two adjacent fixing pieces (7) on the same side, the bottom of the box entering hopper (5) is communicated with the top of the crushing box (1), and the crushing pieces (6) are arranged on the driving rod (8) at equal intervals;

the conveying pipe (2) penetrates through the fixing box (11), four fixing rods (14) are respectively installed at four corner positions of the top of the pressing block box (3), the two driving rods (8) penetrate through the side wall of the crushing box (1) at the same side, gears are sleeved on the driving rods (8), the two gears are meshed and connected, the two gears are arranged in a side shell (9), the side shell (9) is fixed on the side wall of the crushing box (1), a first motor (10) is installed on the side shell (9), and an output shaft of the first motor (10) is connected with one driving rod (8);

the first air pipe (26) and the second air pipe (27) are both communicated with a wind gathering sleeve (281), the wind gathering sleeve (281) is installed at an air outlet of a blower (28), and the blower (28) is fixed on the outer side wall of the combustion box (4);

the working process of the combustion device is as follows:

the method comprises the following steps: putting straws into a box hopper (5), enabling the straws to enter a crushing box (1) through the box hopper (5), starting a first motor (10), driving a driving rod (8) to rotate by an output shaft of the first motor (10), driving a crushing sheet (6) on the surface to rotate by two driving rods (8) of two gears which are connected in a meshed mode, enabling the crushing sheet (6) to be matched with a fixing sheet (7) to crush the straws, enabling the crushed straw powder to enter a fixing box (11), enabling the crushed straw powder to enter a conveying pipe (2) through the fixing box (11), starting a second motor (12), enabling an output shaft of the second motor (12) to rotate by an electric conveying screw (13), conveying the straw powder in the conveying pipe (2) by the conveying screw (13), and conveying the straw powder to a briquetting box (3);

step two: opening a first air cylinder (16), driving a shaping plate (17) by a piston rod of the first air cylinder (16) to extrude and shape straw powder in a briquetting box (3), then opening a second air cylinder (22), drawing a sliding block (19) by a piston rod of the second air cylinder (22) in a contraction way, further drawing a baffle plate (18) by the sliding block (19), enabling the extruded and shaped straw powder to fall into a combustion box (4), then pushing the sliding block (19) by a piston rod of the second air cylinder (22), sealing the bottom of the briquetting box (3) by the baffle plate (18), leading the extruded and shaped straw powder into a combustion chamber (29) through a guide cavity (25), opening an air blower (28), blowing air into a first air pipe (26) and a second air pipe (27) by the air blower (28) through an air gathering sleeve (281), blowing air into the first air pipe (26) into the guide cavity (25), and blowing air into the second air into the combustion chamber (29) by the second air pipe (27), an igniter (32) is started, steam of an external steam engine is connected into the combustion chamber (29) through a steam inlet pipe (30), and waste gas generated in the straw combustion process enters a waste gas treatment box (33) through a waste gas outlet pipe (31);

step three: powder produced in the straw combustion process falls into an ash storage cavity (42), water in an external water tank is connected into the ash storage cavity (42) through a water inlet pipe (41), straw ash is dissolved in water, waste gas enters a waste gas treatment tank (33) and is filtered by a waste gas filter screen (34), meanwhile, a water pump is matched with a circulating cooling pipe (36) to condense particles which are not fully filtered by the waste gas filter screen (34), the particles fall into a water tank (35), an air pump (38) extracts the filtered waste gas and discharges the waste gas into the waste gas treatment tank (33) again through a U-shaped pipe (39), a switch valve on an air outlet pipe (40) is opened after the waste gas is repeatedly filtered, and the gas in the waste gas treatment tank (33) is discharged

The environment-friendly treatment method for the agricultural straws as claimed in claim 1, wherein grooves are symmetrically formed in two sides of the baffle plate (18), convex strips (23) are symmetrically arranged on the inner walls of two sides of the briquetting tank (3), the convex strips (23) are slidably connected with the grooves, and the bottom of the briquetting tank (3) is communicated with the top of the combustion tank (4).

2. The environment-friendly treatment method for agricultural straws as claimed in claim 1, wherein two fixing plates (21) are arranged at two ends of one side of the fixing plates (21), and the water tank (35) is arranged at the bottom of the inner cavity of the waste gas treatment tank (33).

3. The environment-friendly treatment method for the agricultural straws as claimed in claim 1, wherein the circulating cooling pipe (36) is installed on a cooling water pump, and the cooling water pump is installed on the top of the inner wall of the waste gas treatment box (33).

4. The environment-friendly treatment method for agricultural straws as claimed in claim 1, wherein switch valves are mounted on the air outlet pipe (40), the steam inlet pipe (30), the waste gas outlet pipe (31) and the water inlet pipe (41), the steam inlet pipe (30) is externally connected with a steam engine, and the water inlet pipe (41) is externally connected with a water tank.