Modularized combustion furnace system with clockwise and anticlockwise pushing combined hearth

Abstract

The modular combustion furnace system comprises a gasification incinerator, the gasification incinerator comprises a furnace shell, a hearth and a hearth, the furnace shell is installed at the top of the hearth, the hearth is detachably installed in the hearth, an assembly window is formed in the stock bin end of the hearth, and the assembly window is installed in the hearth. A vertical rail support is installed at the position of the assembly window, the width of the vertical rail support is larger than that of the hearth, two sliding movable retaining wall plates are installed on the vertical rail support, a transverse rail support is installed at the bottom of the hearth, and moving wheels are arranged at the bottom of the hearth and embedded in the transverse rail support in a sliding mode. By means of the design, a split type modular installation structure of the furnace hearth and the furnace shell is achieved, so that the whole furnace hearth can be rapidly moved, an air supply system and residual garbage in a hearth can be conveniently overhauled, and the furnace hearth can be conveniently overhauled or a clockwise and anticlockwise pushing combined fire grate set on the furnace hearth can be conveniently replaced.

Description

Technical Field

[0001] The invention belongs to the field of garbage treatment equipment, in particular to a modular combustion furnace system with a forward and reverse push combined furnace bed. Background Art

[0002] With the gradual implementation of the classification of domestic domestic waste in cities, the calorific value of the waste entering the waste incinerator is also steadily increasing. At present, the calorific value of large-scale urban waste is in the range of (4.2MJ / Kg-14MJ / Kg). When the calorific value of the waste reaches 8.4MJ / Kg, the following problems are common in the operation of the combustion section grate: (1) The grate combustion area moves forward. In order to keep the furnace from overheating and reduce coking, the waste processing volume is reduced, resulting in a thinning of the waste layer. The temperature of the combustion section grate plate is obvious and prone to burning. (2) High calorific value waste burns quickly, the waste layer thickness is thinned, and the grate plate is easily exposed to the high-temperature corrosive atmosphere, aggravating wear. (3) The high-temperature grate plate expands due to heat, resulting in insufficient compensation of the grate plate absorber, the movable grate plate is easily stuck, and the working pressure of the hydraulic system is easily damaged by increasing the working pressure of the hydraulic system. (4) The replacement cycle of the grate plate is shortened, increasing the operation and maintenance costs.

[0003] Existing waste incinerators include the following invention patents: multi-row segmented drive composite domestic waste incinerator (ZL200710092508.9) and two-stage waste incinerator (ZL201010268376.2), as well as mechanical grate type waste single furnace gasification incineration system and treatment method thereof (CN105444183A). The structural features of these incinerators are that the furnace bed, furnace frame, grate and furnace shell are all assembled and assembled together using related structures. During assembly, each independent module is not distinguished. The furnace bed is fixed on the furnace shell. Once the furnace bed or the grate or furnace shell is damaged, or because the domestic waste incinerator is adapted to high calorific value waste, the high temperature often causes the grate to be burned and stuck by heat. Once these situations occur, most of the parts of the machine have to be disassembled for repair or replacement. No modular structure is formed, resulting in a complicated assembly process of the entire combustion furnace system and high replacement and maintenance costs. Summary of the invention

[0004] The present invention aims to provide a modular combustion furnace system with a forward and reverse combined furnace bed to solve the technical problems of complex assembly process and high replacement and maintenance cost of the combustion furnace system.

[0005] To achieve the above object, the present invention provides a modular combustion furnace system with a forward and reverse combined furnace bed, comprising a gasification incinerator, wherein the gasification incinerator comprises a furnace shell and a furnace bed, wherein a furnace chamber for accommodating the furnace bed is formed inside the furnace shell.

[0006] An assembly window is provided at the silo end of the furnace, and a vertical track bracket is installed at the assembly window. The width of the vertical track bracket is wider than the width of the furnace, and two sliding movable baffle plates are installed on the vertical track bracket.

[0007] A transverse track bracket is installed at the bottom of the furnace, and a moving wheel is provided at the bottom of the furnace bed, and the moving wheel is slidably embedded in the transverse track bracket.

[0008] Preferably, grooves are provided on both the vertical track bracket and the transverse track bracket, and a cross-shaped groove is formed at the intersection of the vertical track bracket and the transverse track bracket, and the movable baffle plate and the movable wheel are slidably embedded in the groove.

[0009] Preferably, the width of the two movable baffle plates is equal to or greater than the width of the assembly window.

[0010] Preferably, at least four moving wheels are provided at the bottom of the furnace bed, and a wheel axle with a brake is installed between two moving wheels at the rear of the furnace bed.

[0011] Preferably, the hearth comprises a hearth frame, a forward and reverse push combined grate group and a grate power mechanism. The hearth frame is inclined, and the forward and reverse push combined grate group is installed in a stepped manner along the inclined surface of the hearth frame. The grate power mechanism is installed at the top tail end of the hearth frame to drive the forward and reverse push combined grate group to perform forward and reverse push alternating operations.

[0012] Preferably, the forward and reverse push combined grate group is divided into a drying section, a combustion section and a burnout section from top to bottom.

[0013] Preferably, the modular combustion furnace system also includes an air supply system, which is mainly composed of an air inlet pipe, a blower, a tee, a drying and combustion air chamber and a burning and ember air chamber. An air duct hole is provided in the middle of the two movable baffle plates. The blower is fixed to the bottom of the furnace bed frame, and the inlet and outlet of the blower are respectively connected to the air inlet pipe and the tee, and the other two pipe openings of the tee are respectively connected to the drying and combustion air chamber and the burning and ember air chamber, wherein the drying and combustion air chamber is covered at the bottom of the drying section and the combustion section, and the burning and ember air chamber is covered at the bottom of the combustion section and the burning and ember section.

[0014] Preferably, a feed chute is provided at the left end of the furnace shell, a silo is provided at the top of the feed chute, a feed inlet is provided at the top of the silo, and a combustion chamber smoke exhaust port and a slag discharge port are also provided on the furnace shell. The combustion chamber smoke exhaust port is arranged at the top of the furnace bed combustion section, and the slag discharge port is arranged at the frontmost bottom of the furnace bed and vertically downward.

[0015] Preferably, the left and right sides of the hearth are clearance-matched with the inner wall of the furnace, and the clearance range is 5 to 10 mm.

[0016] Compared with the prior art, the modular combustion furnace system of the present invention has the following beneficial effects: a movable groove is designed at the bottom of the inner wall of the furnace, so that the entire furnace bed can be pushed into the furnace along the groove, and can be pulled out as a whole along the groove, thereby realizing a split modular installation structure of the furnace bed and furnace shell. In this way, the entire furnace bed can be moved quickly, which is convenient for inspecting the air supply system and residual garbage in the furnace, as well as for inspecting the furnace bed or replacing the forward and reverse push combined grate group on the furnace bed.

[0017] Two movable baffle panels that can be pulled open to the sides are also designed to facilitate the covering of the hearth and the opening and pulling out of the hearth. Without changing the original furnace shell structure, this design makes it easier to install and maintain the hearth system.

[0018] In addition, the structure of the furnace shell has been redesigned so that the entire furnace shell is formed in one piece and connected to the furnace and the hearth inside the furnace, which can ensure the smooth entry of garbage and the timely discharge of smoke and slag. When the hearth is pulled out, the interior of the entire furnace and furnace shell is hollow, which makes it convenient to clean the combustion furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a three-dimensional schematic diagram of the internal structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the exploded three-dimensional structure of the furnace shell, hearth and furnace;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the hearth installed in the furnace;

[0023] Figure 5 It is a schematic diagram of the main structure of the furnace bed;

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the hearth.

[0025] Explanation of the markings in the figure: 1. furnace shell; 11. silo; 12. smoke exhaust port of combustion chamber; 13. slag discharge port; 14. booster; 15. feed chute; 2. hearth; 20. moving wheel; 21. axle; 22. brake pad; 23. grate power mechanism; 24. hearth frame; 25. forward and reverse push combined grate group; 250. forward push grate group; 251. reverse push grate group; 252. isolation wall; 25-1. drying section; 25-2. combustion section; 25-3. burnout section; 3. furnace; 30. assembly window; 31. vertical track bracket; 32. movable baffle plate; 33. horizontal track bracket; 4. air inlet pipe; 5. blower; 6. three-way pipe; 7. drying and combustion air chamber; 8. combustion and burnout air chamber. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0027] like Figure 1 — Figure 6 A modular combustion furnace system with a forward and reverse combined furnace bed includes a gasification incinerator, the gasification incinerator includes a furnace shell 1 and a furnace bed 2, a furnace chamber 3 for accommodating the furnace bed is formed inside the furnace shell 1, and the furnace bed 2 is detachably installed in the furnace chamber 3. The furnace shell 1 covers the furnace bed 2, and the inner cavity of the furnace shell 1 is communicated with the furnace chamber 3.

[0028] An assembly window 30 is provided at the silo end of the furnace 3 , and a vertical track bracket 31 is installed at the assembly window 30 . The width of the vertical track bracket 31 is wider than the width of the furnace 3 , and two sliding movable baffle plates 32 are installed on the vertical track bracket 31 .

[0029] A transverse track bracket 33 is installed at the bottom of the furnace 3, and a moving wheel 20 is provided at the bottom of the furnace bed 2, and the moving wheel 20 is slidably embedded in the transverse track bracket 33. Grooves are provided on the vertical track bracket 31 and the transverse track bracket 33, and a cross-shaped groove (such as Figure 4 As shown), the movable baffle plate 32 and the movable wheel 20 are slidably embedded in the groove, and the horizontal track bracket 33 is installed perpendicular to the vertical track bracket 31, and the horizontal track bracket 33 must exceed the Z-axis position range of the vertical track bracket 31, and extend to the rear of the entire gasification incinerator, so that the furnace bed 2 will not get stuck when it is pulled out, and it is also convenient to push the installation. When the furnace bed 2 is pushed into the furnace 3 along the groove, the gap between the left and right sides of the furnace bed 2 and the inner wall of the furnace 3 is matched, and the gap range is 5 to 10 mm, or it can be other gap widths, which can be determined according to the width of the furnace bed 2 and the thermal expansion coefficient of the material. This gap size can ensure that the furnace bed 2 is fully pulled out, and that the garbage on the furnace bed 2 does not fall down.

[0030] The width of the two movable baffle plates 32 is equal to or greater than the width of the assembly window 30. After the two movable baffle plates 32 are opened to both sides, the hearth 2 is completely exposed, so that the hearth 2 can be smoothly pulled in and out.

[0031] According to the overall length of the furnace bed 2, at least four moving wheels (or 8) are provided at the bottom of the furnace bed 2, and a wheel axle 21 with a brake is installed between the two moving wheels 20 at the tail of the furnace bed 2. The wheel axle 21 and the moving wheel 20 are equivalent to the brake structure of a baby carriage, and a brake pad 22 is installed on the wheel axle 21. The brake pad 22 is turned to lock the moving wheel to ensure that the moving wheel 20 will not continue to move after being pushed into the furnace 3. A cargo box lock (not shown in the figure, this is a conventional locking structure) used on the tail of a truck can also be set between the tail of the furnace bed 2 and the inner wall of the furnace. After the furnace bed 2 is pushed in, it is locked in the furnace using the cargo box lock and the hook, so that after the air supply system is started, the furnace bed will not shake.

[0032] like Figure 5 , Figure 6 As shown, the hearth 2 includes a hearth frame 24, a forward and reverse push combined grate group 25 and a grate power mechanism 23. The hearth frame 24 is inclined, and the forward and reverse push combined grate group 25 is installed in a stepped manner along the inclined surface of the hearth frame 24. The grate power mechanism 23 is installed at the top tail end of the hearth frame 24, and is used to drive the forward and reverse push combined grate group 25 to perform forward and reverse push alternating operations.

[0033] The forward and reverse push combined grate group 25 is arranged alternately on a horizontal concave-convex support system with forward push grate groups 250 and reverse push grate groups 251, with two isolation walls 252 in the middle. The reverse push grate group 251 is in the middle of the isolation wall 252, and the forward push grate groups 250 are on both sides of the isolation wall 252. In this way, when the grate power mechanism 23 is driven, one forward push and one reverse push give the garbage in the furnace a back and forth rubbing action, which can adjust the moving speed difference in the middle of the material and avoid the side wall effect that affects the reaction of the material in the furnace.

[0034] The forward and reverse combined grate group 25 is divided into a drying section 25-1, a combustion section 25-2 and a burnout section 25-3 from top to bottom.

[0035] The modular combustion furnace system also includes an air supply system, which is mainly composed of an air inlet pipe 4, a blower 5, a tee pipe 6, a drying and combustion air chamber 7 and a combustion and ember air chamber 8. An air duct hole is provided in the middle of the two movable baffle plates 32. The blower 5 is fixed to the bottom of the furnace bed frame 24. The inlet and outlet of the blower 5 are respectively connected to the air inlet pipe 4 and the tee pipe 6. The other two pipe openings of the tee pipe 6 are respectively connected to the drying and combustion air chamber 7 and the combustion and ember air chamber 8. The drying and combustion air chamber 7 is covered at the bottom of the drying section 25-1 and the combustion section 25-2, and the combustion and ember air chamber 8 is covered at the bottom of the combustion section 25-2 and the ember section 25-3.

[0036] A feed chute 15 is provided at the left end of the furnace shell 1. The feed chute 15 is located above the highest position of the furnace bed. A silo 11 is provided on the top of the feed chute 15. A feed inlet is provided on the top of the silo 11. A combustion chamber smoke exhaust port 12 and a slag discharge port 13 are also provided on the furnace shell 1. The combustion chamber smoke exhaust port 12 is provided at the top of the furnace bed combustion section 25-2. The slag discharge port 13 is provided at the front of the bottom of the furnace bed 2 and faces vertically downward. The slag discharge port is located below the lowest position of the furnace bed to facilitate slag discharge.

[0037] In addition, a push plate can be set at the front end of the feed chute 15 (or the position of the silo near the top of the furnace bed), and the push plate is connected to a booster 14. When the booster 14 is continuously pushed horizontally, the garbage in the feed chute 15 is quickly pushed onto the furnace bed 2, which can also prevent the garbage from clogging the discharge port of the silo 11.

[0038] When the combustion furnace system is working, it follows the following steps:

[0039] Step A, close the gate of the gasification incinerator and the atmosphere ventilation, start the gasification incinerator, put the garbage raw materials into the feed bin, the booster 14 pushes the materials back and forth for many times, and pushes the garbage raw materials falling from the feed bin into the stacking sealing section between the feed bin and the gasification incinerator, so that the stacking sealing section forms a stacking sealing state, and the excess garbage falls into the moving furnace bed of the gasification incinerator, and the moving furnace bed of the gasification incinerator works until the garbage is piled up on the moving furnace bed of the gasification incinerator to a required thickness, and then stop feeding into the feed bin, and the moving furnace bed of the gasification incinerator stops working, and then, use an ignition burner to extend into the furnace through the ignition and combustion-supporting hole of the gasification incinerator, and under the action of the ignition burner, the gasification incinerator is started and baked, and when this process is stably completed, the furnace of the gasification incinerator reaches a predetermined temperature of 600-700°C;

[0040] Step B, start and adjust the air supply system, adjust the process parameters of the gasification incinerator and the air supply system, feed materials into the feed bin, and the mobile hearth in the furnace works to transport garbage, and the garbage starts to burn in the furnace, so that the combustion state temperature in the furnace is stabilized to above 850°C;

[0041] Step C, adjusting the process parameters of the gasification incinerator, the combustion chamber and the air supply system, so that the heat treatment mode of the garbage on the furnace bed is transitioned from the process of drying → combustion → burning to the process of drying → pyrolysis gasification → burning, the bottom ash is transported to the slag discharge port 13, and the outlet temperature of the combustion chamber exhaust port 12 is stabilized to above 850° C., so as to realize continuous gasification and incineration treatment of the garbage;

[0042] Step D: When maintenance or shutdown is required, stop feeding, adjust the process parameters of the gasification incinerator, combustion chamber and air supply system to gradually restore the gasification incinerator to the combustion state. After the garbage and garbage residue are burned out, turn off the mechanical grate type garbage single furnace gasification incinerator and the air supply system. When cleaning is required, pull out the furnace bed.

[0043] The above is a detailed introduction to a modular combustion furnace system with a forward and reverse combined furnace bed provided by the present application. The description of the specific embodiment is only used to help understand the method and its core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A modular combustion furnace system with a forward and reverse combined furnace bed, comprising a gasification incinerator, the gasification incinerator comprising a furnace shell (1) and a furnace bed (2), a furnace chamber (3) for accommodating the furnace bed (2) being formed inside the furnace shell (1), Features: An assembly window (30) is provided at the silo end of the furnace (3), a vertical track bracket (31) is installed at the assembly window (30), the width of the vertical track bracket (31) is wider than the width of the furnace (3), and two sliding movable baffle plates (32) are installed on the vertical track bracket (31). A transverse track bracket (33) is installed at the bottom of the furnace (3), and a moving wheel (20) is provided at the bottom of the furnace bed (2), wherein the moving wheel (20) is slidably embedded in the transverse track bracket (33).

2. A modular combustion furnace system with a forward and reverse combined furnace bed according to claim 1, characterized in that: The vertical track bracket (31) and the transverse track bracket (33) are both provided with grooves, and a cross-shaped groove is formed at the intersection of the vertical track bracket (31) and the transverse track bracket (33), and the movable baffle plate (32) and the movable wheel (20) are slidably embedded in the groove.

3. A modular combustion furnace system with a forward and reverse combined furnace bed according to claim 1, characterized in that: The width of the two movable baffle plates (32) is equal to or greater than the width of the assembly window (30).

4. A modular combustion furnace system with a forward and reverse combined furnace bed according to claim 1, characterized in that: At least four moving wheels (20) are arranged at the bottom of the furnace bed (2), and a wheel axle (21) with a brake is installed between two moving wheels at the rear of the furnace bed (2).

5. A modular combustion furnace system with a forward and reverse combined furnace bed according to claim 1, characterized in that: The hearth (2) comprises a hearth frame (24), a forward and reverse push combined grate group (25) and a grate power mechanism (23); the hearth frame (24) is inclined; the forward and reverse push combined grate group (25) is installed in a stepped manner along the inclined surface of the hearth frame (24); and the grate power mechanism (23) is installed at the top and rear end of the hearth frame (24) and is used to drive the forward and reverse push combined grate group (25) to perform forward push and reverse push alternating operation actions.

6. A modular combustion furnace system with a forward and reverse combined furnace bed according to claim 5, characterized in that: The forward and reverse push combined grate group (25) is divided into a drying section (25-1), a combustion section (25-2) and a burnout section (25-3) from top to bottom.

7. A modular combustion furnace system with a forward and reverse combined furnace bed according to claim 6, characterized in that: The modular combustion furnace system also includes an air supply system, which is mainly composed of an air inlet pipe (4), a blower (5), a three-way pipe (6), a drying and combustion air chamber (7) and a combustion and ember air chamber (8). An air duct hole is provided in the middle of the two movable baffle plates (321). The blower (5) is fixed to the bottom of the furnace bed frame (24). The inlet and outlet of the blower (5) are respectively connected to the air inlet pipe (4) and the three-way pipe (6). The other two pipe openings of the three-way pipe (6) are respectively connected to the drying and combustion air chamber (7) and the combustion and ember air chamber (8). The drying and combustion air chamber (7) is covered at the bottom of the drying section (25-1) and the combustion section (25-2), and the combustion and ember air chamber (8) is covered at the bottom of the combustion section (25-2) and the ember section (25-3).

8. A modular combustion furnace system with a forward and reverse combined furnace bed according to claim 7, characterized in that: A feed chute (15) is provided at the left end of the furnace shell (1), a silo (11) is provided at the top of the feed chute (15), a feed inlet is provided at the top of the silo (11), and a combustion chamber smoke exhaust port (12) and a slag discharge port (13) are also provided on the furnace shell (1), the combustion chamber smoke exhaust port (12) is provided at the top of the furnace bed combustion section (25-2), and the slag discharge port (13) is provided at the frontmost part of the bottom of the furnace bed (2) and faces vertically downward.

9. A modular combustion furnace system with a forward and reverse combined furnace bed according to claim 5, characterized in that: The left and right sides of the furnace bed (2) are clearance-matched with the inner wall of the furnace chamber (3), and the clearance range is 5 to 10 mm.

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