A water-cooled reciprocating grate biomass gasification burner

Abstract

The present invention provides a reciprocating grate biomass gasification combustion device, comprising a combustion chamber, a swirl burner head, a reciprocating grate water cooling device, a material discharge assembly, and a cooling and heat exchange device; the swirl burner head is communicated with the combustion chamber; the reciprocating grate water cooling device comprises a reciprocating grate frame; a static grate plate steel frame is provided on the reciprocating grate frame; a moving grate plate steel frame is provided on the reciprocating grate frame; a static grate plate steel frame has static grate plates; a moving grate plate steel frame has moving grate plates; connecting pipes are provided between the static grate plate steel frames; a water inlet joint and a water outlet joint are provided at both ends of the connecting pipe respectively; the cooling conversion device comprises a cold-heat converter and a tertiary air fan, the cold-heat converter is connected to the water inlet joint and the water outlet joint through a water pipe; the cold-heat converter is connected to the air duct through an air pipe; the cold-heat converter is connected to the material discharge assembly through a second air pipe; the tertiary air fan is on the second air pipe, which improves safety and reliability, and the cooling and heat exchange device saves energy.

Description

Technical Field

[0001] The burner provided by the present invention particularly relates to a water-cooled reciprocating grate biomass gasification burner. Background Art

[0002] Conventional reciprocating grate biomass combustion has poor sealing effect, high air leakage coefficient, unconcentrated heat, positive pressure combustion, easy damage of grate, incomplete combustion, difficulty in slagging, substandard emissions, and easy to cause problems such as low thermal efficiency and environmental pollution. This technology provides a water-cooled reciprocating grate biomass gasification burner, which solves the problems of incomplete combustion of biomass fuel, low thermal efficiency, environmental pollution, etc., reduces air leakage coefficient, reduces pollution emissions, extends the service life of the grate, realizes the concentration of combustion heat and centralized clean slagging, and at the same time cooperates with negative pressure combustion, the explosion-proof door set up greatly improves the safety and reliability of the equipment, and the cooling and heat exchange device greatly saves energy. Summary of the invention

[0003] The water-cooled reciprocating grate biomass gasification burner provided by the present invention has a simple structure and is easy to use. It solves the problems of insufficient combustion of biomass fuel, low thermal efficiency, environmental pollution, etc., reduces the air leakage coefficient, reduces pollution emissions, extends the service life of the grate, and realizes the concentration of combustion heat and centralized clean slag discharge. At the same time, in conjunction with negative pressure combustion, the explosion-proof door provided greatly improves the safety and reliability of the equipment, and the cooling and heat exchange device greatly saves energy.

[0004] The invention provides a water-cooled reciprocating grate biomass gasification burner, comprising a combustion chamber, a swirl burner head, a water-cooled reciprocating grate arranged in the combustion chamber, a material discharge assembly, a cooling conversion device, and a spiral flat slag discharger.

[0005] The cooling conversion device is connected to the combustion chamber, the swirl burner head, the feeding assembly, and the water-cooled reciprocating grate through connecting pipes; a retaining wall is fixedly connected to the upper end surface of the interior of the combustion chamber; a supporting ventilation beam is provided on the lower end surface of the retaining wall; a plurality of air ducts are evenly arranged on the supporting ventilation beam; the combustion chamber is divided into a gasification zone and a combustion zone by the retaining wall; and the combustion chamber is fixedly connected to the retaining wall.

[0006] The swirl burner head comprises a central cavity; an intermediate cylinder is sleeved on the outer end surface of the central cavity; an outer cylinder is sleeved on the outer end surface of the intermediate cylinder; an inner cylinder is connected to the end of the central cavity in the outer cylinder; a sleeve is sleeved on the surface of the inner cylinder inside the outer cylinder; an L-shaped ring plate fixedly connected to the central cavity, the inner wall of the outer cylinder and the intermediate cylinder is sleeved on the surface of the sleeve; a flange plate is provided at the end of the outer cylinder; the outer cylinder, the L-shaped ring plate, the central cavity, the sleeve and the flange plate form a swirl chamber; the swirl chamber is connected to the inner cylinder through a swirl tube; the swirl chamber is connected to the central cavity through a second swirl plate; the outer cylinder, the intermediate cylinder and the L-shaped ring plate form a second swirl chamber; a swirl frame is provided between the outer cylinder and the intermediate cylinder; a swirl plate is provided on the swirl frame; an air duct is connected to the outer cylinder; the air duct is divided into a first air duct and a second air duct by a partition; the first air duct is connected to the second swirl chamber; the second air duct is connected to the swirl chamber; the outer cylinder is connected to the combustion zone.

[0007] The water-cooled reciprocating grate comprises a reciprocating grate frame; a plurality of stationary grate plate steel frames are arranged on the reciprocating grate frame; a moving grate plate steel frame is arranged on the reciprocating grate frame and between the stationary grate plate steel frames; stationary grate plates are arranged on the stationary grate plate steel frames; moving grate plates are arranged on the moving grate plate steel frames; connecting pipes are arranged between the stationary grate plate steel frames; water inlet joints and water outlet joints are respectively arranged at both ends of the connecting pipe extending out of the stationary grate plate steel frames.

[0008] The material discharge assembly includes a baffled material discharge pipe connected to the gasification zone; the upper end surface of the baffled material discharge pipe is connected to a sealed double switch valve box; the upper end surface of the sealed double switch valve box is connected to a hopper; a dust hood is provided on the upper end surface of the hopper; an explosion-proof door is provided on the surface of the baffled material discharge pipe; and a rotary level meter and a sealed double switch valve are provided on the surface of the sealed double switch valve box.

[0009] An ignition port and a temperature measuring device are provided at the upper gasification zone of the combustion chamber; a negative pressure detection device and an in-furnace denitration device are provided at the upper combustion zone of the combustion chamber; the outer cylinder is connected to the combustion zone of the combustion chamber through a flange plate; the end of the second air pipe away from the tertiary air fan is arranged in the gasification zone.

[0010] The cooling conversion device includes a heat-cold converter and a tertiary air fan; the heat-cold converter is connected to the water inlet joint and the water outlet joint through water pipes respectively; the heat-cold converter is connected to the air duct through an air pipe; the heat-cold converter is connected to the unloading assembly through a second air pipe; the tertiary air fan is arranged on the second air pipe.

[0011] The water-cooled reciprocating grate is powered by a grate power system disposed on the outer end surface of the combustion chamber; a bellows is disposed in the combustion chamber and at the lower end of the water-cooled reciprocating grate; and the supporting ventilation beam is connected to the bellows via an air duct.

[0012] A spiral horizontal slag discharger is provided at the tail end of the water-cooled reciprocating grate in the combustion chamber; a second explosion-proof door is provided at the tail end of the water-cooled reciprocating grate in the combustion chamber.

[0013] The end of the outer cylinder away from the air duct is fixedly connected with a contraction tube; a plurality of swirl tubes are evenly arranged; and regulating valves are respectively arranged in the first air duct and the second air duct.

[0014] The connecting pipes between the static grate row plate steel frames form a series loop; the static grate row plate steel frames and the static grate row plates are tightly connected by buckles.

[0015] The beneficial effects of the present invention are as follows: when the biomass fuel enters the gasification zone of the combustion chamber through the feeding assembly, part of the combustible gas is separated out through high-temperature cracking. After continuous air supply by the blower and transportation by the reciprocating grate, the combustible gas and solid fuel are burned in the combustion zone. The secondary and tertiary air provided by the supporting ventilation beams arranged inside the combustion chamber and the swirl burner head arranged at the front end of the combustion chamber ensure the full combustion of the fuel and the full release of heat. The spiral flat slag discharger arranged at the tail of the water-cooled reciprocating grate finally discharges the ash and slag in a centralized manner. The sealing measures of the whole set of equipment reduce the air leakage coefficient and avoid the problems of unburned fuel, incomplete combustion, high fuel consumption, etc. Negative pressure combustion is realized in conjunction with the induced draft fan. At the same time, safety and environmental protection measures such as grate cooling heat exchanger, grate water cooling circulation device, explosion-proof door, and furnace denitrification device are arranged to ensure the safety and reliability of the equipment and the low nitrogen emission of flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of a water-cooled reciprocating grate biomass gasification burner of the present invention.

[0017] Figure 2 It is a cross-sectional view of a water-cooled reciprocating grate biomass gasification burner of the present invention.

[0018] Figure 3 This is a structural diagram of a water-cooled reciprocating grate biomass gasification burner of the present invention.

[0019] Figure 4 This is another structural diagram of a water-cooled reciprocating grate biomass gasification burner of the present invention.

[0020] (1. Central cavity; 2. Intermediate tube; 3. Outer tube; 4. Inner tube; 5. Sleeve; 6. L-shaped ring plate; 7. Flange plate; 8. Cyclone chamber; 9. Second cyclone plate; 10. Second cyclone chamber; 11. Cyclone tube; 12. Cyclone plate; 13. Air duct; 14. Partition plate; 15. First air duct; 16. Second air duct; 17. Reciprocating grate frame; 18. Stationary grate steel frame; 19. Moving grate steel frame; 20. Stationary grate; 21. Moving grate; 22. Connecting pipe; 23. Water inlet joint; 24. Water outlet joint; 25. Cooling conversion device; 26. Tertiary air blower; 27. Regulating valve; 28. Air pipe; 29. ​​Second gas pipe; 30, combustion chamber; 31, water-cooled reciprocating grate; 32, swirl burner; 33, feeding assembly; 34, baffle feeding pipe; 35, sealed double switch valve box; 36, hopper; 37, dust cover; 38, explosion-proof door; 39, swirl level meter; 40, sealed double switch valve; 41, retaining wall; 42, supporting ventilation beam; 43, shrinkage duct; 44, gasification zone; 45, combustion zone; 46, ignition port; 47, temperature measuring device; 48, negative pressure detection device; 49, denitration device in the furnace; 50, grate power system; 51, spiral flat slag discharger; 52, second explosion-proof door; 53, bellows; 54, air duct) DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] according to Figure 1 , Figure 2 , Figure 3 , Figure 4The water-cooled reciprocating grate biomass gasification burner shown in the figure comprises a combustion chamber 30, a swirl burner head 32, a water-cooled reciprocating grate 31 arranged in the combustion chamber 30, a material discharge assembly 33, a cooling conversion device 25, and a spiral flat slag discharger 51; the cooling conversion device 25 is respectively connected to the combustion chamber 30, the swirl burner head 32, the material discharge assembly 33, and the water-cooled reciprocating grate 31 through connecting pipes; a retaining wall 41 is fixedly connected to the upper end surface of the combustion chamber 30; a supporting ventilation beam 42 is provided on the lower end surface of the retaining wall 41; a plurality of air ducts 54 are evenly arranged on the supporting ventilation beam 42; the combustion chamber 30 is divided into a gasification zone 44 and a combustion zone 45 by the retaining wall 41; the combustion chamber 30 is fixedly connected to the retaining wall 41; The swirl burner head 32 includes a concentrated cavity 1; an intermediate cylinder 2 is sleeved on the outer end surface of the concentrated cavity 1; an outer cylinder 3 is sleeved on the outer end surface of the intermediate cylinder 2; an inner cylinder 4 is connected to the end of the concentrated cavity 1 in the outer cylinder 3; a sleeve 5 is sleeved on the surface of the inner cylinder 4 inside the outer cylinder 3; an L-shaped ring plate 6 fixedly connected to the concentrated cavity 1, the inner wall of the outer cylinder 3 and the intermediate cylinder 2 is sleeved on the surface of the sleeve 5; a flange plate 7 is provided at the end of the outer cylinder 3; the outer cylinder 3, the L-shaped ring plate 6, the concentrated cavity 1, the sleeve 5, and the flange plate 7 form a swirl chamber 8; the swirl chamber 8 is connected to the inner cylinder 4 through a swirl tube 11; the swirl chamber 8 is connected to the concentrated cavity through a second swirl plate 9; the outer cylinder 3, the intermediate cylinder 2, and the L-shaped ring plate 6 form a second swirl chamber 10; A swirl frame is provided between the outer tube 3 and the intermediate tube 2; a swirl plate 12 is provided on the swirl frame; an air duct 13 is connected to the outer tube 3; the air duct 13 is divided into a first air duct 15 and a second air duct 16 by a partition 14; the first air duct 15 is communicated with the second swirl chamber 10; the second air duct 16 is communicated with the swirl chamber 8; the outer tube 3 is communicated with the combustion zone 45; the water-cooled reciprocating grate 31 includes a reciprocating grate frame 17; a plurality of static grate steel frames 18 are provided on the reciprocating grate frame 17; a moving grate steel frame 19 is provided on the reciprocating grate frame 17 and between the static grate steel frames 18; a static grate steel frame 20 is provided on the static grate steel frame 18; a moving grate steel frame 20 is provided on the moving grate steel frame 19 1; a connecting pipe 22 is provided between the static grate steel frame 18; the two ends of the connecting pipe 22 extending out of the static grate steel frame 18 are respectively provided with a water inlet joint 23 and a water outlet joint 24; the material discharge assembly 33 includes a baffle material discharge pipe 34 connected to the gasification zone 44; the upper end surface of the baffle material discharge pipe 34 is connected to a sealed double switch valve box 35; the upper end surface of the sealed double switch valve box 35 is connected to a hopper 36; the upper end surface of the hopper 36 is provided with a dust cover 37; the surface of the baffle material discharge pipe 34 is provided with an explosion-proof door 38; the surface of the sealed double switch valve box 35 is provided with a rotary level meter 39 and a sealed double switch valve 40; the upper gasification zone 44 of the combustion chamber 30 is provided with an ignition port 46 and a temperature measuring device 47;A negative pressure detection device 48 and an in-furnace denitration device 49 are provided at the combustion zone 45 on the combustion chamber 30; the outer tube 3 is connected to the combustion zone 45 at the combustion chamber 30 through a flange plate 7; the end of the second air pipe 29 away from the tertiary air blower 26 is arranged in the gasification zone 44; the cooling conversion device 25 includes a cold-heat converter and a tertiary air blower 26; the cold-heat converter is connected to the water inlet joint 23 and the water outlet joint 24 respectively through a water pipe; the cold-heat converter is connected to the air duct 13 through the air pipe 28; the cold-heat converter is connected to the unloading assembly 33 through the second air pipe 29; the tertiary air blower 26 is arranged on the second air pipe 29; the water-cooled reciprocating grate 31 is moved by the grate movement arranged on the outer end surface of the combustion chamber 30 The power system 50 provides power; a bellows 53 is provided at the lower end of the water-cooled reciprocating grate 31 in the combustion chamber 30; the supporting ventilation beam 42 is connected to the bellows 53 through an air duct 54; a spiral flat slag discharger 51 is provided at the tail end of the water-cooled reciprocating grate 31 in the combustion chamber 30; a second explosion-proof door 52 is provided at the tail end of the water-cooled reciprocating grate 31 on the combustion chamber 30; a contraction duct 43 is fixedly connected to the end of the outer tube 3 away from the air duct; a plurality of swirl tubes 11 are evenly provided; regulating valves 27 are respectively provided in the first air duct 15 and the second air duct 16; the connecting pipes 22 between the static grate steel frames 18 form a series loop; the static grate steel frames 18 and the static grate 20 are tightly connected by buckles. ;

[0023] Principle of the present invention: The combustion of a water-cooled reciprocating grate biomass gasification burner provided by the present invention is negative pressure combustion. The biomass fuel enters the gasification zone 44 through the unloading assembly 33, and part of the combustible gas is separated out through high-temperature cracking. The combustible gas and solid fuel are burned in the combustion zone 45 through continuous air supply from the wind box 53 and transportation from the water-cooled reciprocating grate 31. The ash is finally discharged through the spiral flat slag discharger 51 arranged on the water-cooled reciprocating grate 31. The tertiary air fan 26 is started, and the smoke inside the combustion chamber 30 is absorbed through the second air pipe 29. The resulting cold air enters the cold-heat converter. The converter is connected to the water inlet joint 23 and the water outlet joint 24 through a water pipe, and water circulates between the static grate steel frame 18 and the cold-heat converter. When the water in the static grate steel frame 18 becomes hot, it circulates into the cold-heat converter. The hot water of the cold-heat converter is cooled by the cold air in the cold-heat converter and circulates into the static grate steel frame 18 for cooling. The cold air in the cold-heat converter is heated by the hot water and flows into the air duct 13. When in use, the wind enters from the first air duct 15 and the second air duct 16, and the wind enters from the first air duct 15 and the second air duct 16. The first air duct 15 enters the second cyclone chamber 10, and a cyclone plate 12 is provided in the second cyclone chamber 10. The wind entering the second cyclone chamber 10 passes through the cyclone plate 12 to form a primary cyclone wind. When the primary cyclone wind passes through the air contraction tube 43 on the outer cylinder 3, the primary cyclone wind gathers toward the center point to achieve flame concentration. The wind enters the cyclone chamber 8 through the second air duct 16. The wind entering the cyclone chamber 8 passes through the second cyclone plate 9 to form a secondary cyclone wind. The secondary cyclone wind enters the combustion zone 45 to assist combustion. The cyclone chamber 8 Another part of the wind inside passes through the swirl tube 11 to form a tertiary swirl wind, which passes through the inner tube 4 and enters the combustion zone 45 to assist combustion. The tertiary swirl wind is concentrated in the combustion zone 45. The mutual cooperation of the primary swirl wind, the secondary swirl wind and the tertiary swirl wind ensures the combustion effect, reduces the ash content, and greatly improves the combustion effect of biomass fuels. There are regulating valves 27 in the first air duct 15 and the second air duct 16 respectively, which realize the function of adjusting the wind force respectively, and the refractory layer prevents heat dissipation.

[0024] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A water-cooled reciprocating grate biomass gasification burner, characterized in that: The invention comprises a combustion chamber (30), a swirl burner (32), a water-cooled reciprocating grate (31) arranged in the combustion chamber (30), a material discharge assembly (33), a cooling conversion device (25), and a spiral flat slag discharger (51); the cooling conversion device (25) is respectively connected to the combustion chamber (30), the swirl burner (32), the material discharge assembly (33), and the water-cooled reciprocating grate (31) through connecting pipes; a retaining wall (41) is fixedly connected to the upper end surface of the combustion chamber (30); a supporting ventilation beam (42) is provided on the lower end surface of the retaining wall (41); a plurality of air ducts (54) are evenly arranged on the supporting ventilation beam (42); the combustion chamber (30) is divided into a gasification zone ( 44), a combustion zone (45); the combustion chamber (30) is fixedly connected to the retaining wall (41); the swirl burner head (32) comprises a central cavity (1); an intermediate cylinder (2) is sleeved on the outer end surface of the central cavity (1); an outer cylinder (3) is sleeved on the outer end surface of the intermediate cylinder (2); an inner cylinder (4) is connected to the end of the central cavity (1) in the outer cylinder (3); a sleeve (5) is sleeved on the surface of the inner cylinder (4) inside the outer cylinder (3); an L-shaped ring plate (6) is sleeved on the surface of the sleeve (5) and is fixedly connected to the central cavity (1), the inner wall of the outer cylinder (3) and the intermediate cylinder (2); a flange plate (7) is provided at the end of the outer cylinder (3); the outer cylinder (3), the L-shaped ring plate (6), the central cavity (1), the sleeve The cylinder (5) and the flange plate (7) form a cyclone chamber (8); the cyclone chamber (8) is connected to the inner cylinder (4) via a cyclone tube (11); the cyclone chamber (8) is connected to the central cavity via a second cyclone plate (9); the outer cylinder (3), the middle cylinder (2) and the L-shaped ring plate (6) form a second cyclone chamber (10); a cyclone frame is provided between the outer cylinder (3) and the middle cylinder (2); a cyclone plate (12) is provided on the cyclone frame; an air duct (13) is connected to the outer cylinder (3); the air duct (13) is divided into a first air duct (15) and a second air duct (16) by a partition plate (14); the first air duct (15) is connected to the second cyclone chamber (10); the second air duct (16) is connected to the cyclone chamber (1 ... 8); the outer cylinder (3) is in communication with the combustion zone (45); the water-cooled reciprocating grate (31) comprises a reciprocating grate frame (17); a plurality of stationary grate steel frames (18) are provided on the reciprocating grate frame (17); a moving grate steel frame (19) is provided on the reciprocating grate frame (17) and between the stationary grate steel frames (18); a stationary grate steel frame (20) is provided on the stationary grate steel frame (18); a moving grate steel frame (21) is provided on the moving grate steel frame (19); connecting pipes (22) are provided between the stationary grate steel frames (18); water inlet joints (23) and water outlet joints (24) are provided at both ends of the connecting pipe (22) extending out of the stationary grate steel frame (18); The material discharge assembly (33) comprises a baffled material discharge pipe (34) connected to the gasification zone (44); the upper end surface of the baffled material discharge pipe (34) is connected to a sealed double-on / off valve housing (35); the upper end surface of the sealed double-on / off valve housing (35) is connected to a hopper (36); a dust cover (37) is provided on the upper end surface of the hopper (36); an explosion-proof door (38) is provided on the surface of the baffled material discharge pipe (34); a rotary level meter (39) and a sealed double-on / off valve (40) are provided on the surface of the sealed double-on / off valve housing (35); An ignition port (46) and a temperature measuring device (47) are provided at the upper gasification zone (44) of the combustion chamber (30); a negative pressure detection device (48) and an in-furnace denitration device (49) are provided at the upper combustion zone (45) of the combustion chamber (30); the outer cylinder (3) is in communication with the combustion zone (45) of the combustion chamber (30) via a flange plate (7); an end of the second gas pipe (29) away from the tertiary air blower (26) is provided in the gasification zone (44); The cooling conversion device (25) comprises a cold-heat converter and a tertiary air blower (26); the cold-heat converter is connected to a water inlet joint (23) and a water outlet joint (24) respectively through water pipes; the cold-heat converter is connected to an air duct (13) through an air pipe (28); the cold-heat converter is connected to a material discharge assembly (33) through a second air pipe (29); and the tertiary air blower (26) is arranged on the second air pipe (29).

2. The water-cooled reciprocating grate biomass gasification burner according to claim 1, characterized in that: The water-cooled reciprocating grate (31) is powered by a grate power system (50) disposed on the outer end surface of the combustion chamber (30); a wind box (53) is disposed in the combustion chamber (30) and at the lower end of the water-cooled reciprocating grate (31); and the supporting ventilation beam (42) is connected to the wind box (53) via an air duct (54).

3. The water-cooled reciprocating grate biomass gasification burner according to claim 1, characterized in that: A spiral horizontal slag discharger (51) is provided at the tail end of the water-cooled reciprocating grate (31) in the combustion chamber (30); and a second explosion-proof door (52) is provided at the tail end of the water-cooled reciprocating grate (31) on the combustion chamber (30).

4. The water-cooled reciprocating grate biomass gasification burner according to claim 1, characterized in that: The end of the outer cylinder (3) away from the air duct is fixedly connected to a contraction tube (43); a plurality of swirl tubes (11) are evenly arranged; and regulating valves (27) are respectively arranged in the first air duct (15) and the second air duct (16).

5. The water-cooled reciprocating grate biomass gasification burner according to claim 1, characterized in that: The connecting pipes (22) between the static grate row steel frames (18) form a series loop; the static grate row steel frames (18) and the static grate row plates (20) are tightly connected by buckles.

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