Waste heat burning-out integrated furnace

Abstract

The utility model discloses a waste heat burning-out integrated furnace, which belongs to the technical field of solid waste burning, and has the technical key points that the furnace comprises a furnace body, the whole furnace body adopts a full-membrane wall structure, a first chamber, a second chamber, a third chamber and a fourth chamber which are mutually communicated one by one are arranged in the furnace body, and natural circulation is adopted in the whole furnace body; the secondary combustion chamber and the waste heat boiler are comprehensively considered, a new product is designed, a heat insulation structure of the secondary combustion chamber is changed into a water cooling structure, a high-amount refractory masonry structure is not adopted any more, the secondary combustion chamber and the waste heat boiler are integrated, meanwhile, the existing technology is optimized, the investment and maintenance cost of the secondary combustion chamber is greatly reduced, and a medical waste project is taken as an example. Compared with an original heat insulation secondary combustion chamber, the investment and maintenance cost can be greatly reduced, meanwhile, the effects of saving energy, reducing consumption and saving the occupied area of a project can be achieved, and the heat insulation secondary combustion chamber has the advantage that the effects of saving energy, reducing consumption and saving the occupied area of the project can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of solid waste incineration, in particular to a combustion and waste heat integrated furnace. Background Art

[0002] The pyrolysis technology route currently used to treat domestic waste, hazardous waste and medical waste is: pyrolysis furnace + adiabatic secondary combustion chamber + waste heat boiler + environmental protection facilities. The pyrolysis furnace is responsible for the pyrolysis and gasification of materials, and the adiabatic secondary combustion chamber is responsible for the combustion of gasified gas. At a certain temperature, the combustion time is more than 2 seconds. The temperature of the secondary combustion chamber is controlled by controlling the air supply volume to ensure the decomposition of dioxins to meet relevant standards. Waste heat boilers generally use membrane wall structures to reduce the flue gas temperature coming out of the secondary combustion chamber and protect the safe and stable operation of environmental protection equipment such as dust collectors and deacidification towers. The steam generated by waste heat boilers can be used for industrial production, three-effect evaporation, power generation, etc.

[0003] At present, the insulated secondary combustion chamber requires a large amount of refractory materials for masonry, and has a short service life. It generally needs to be replaced every 2-3 years, and the maintenance cost is very high. In addition, the insulated secondary combustion chamber uses excessive air temperature control, which increases the smoke exhaust volume and smoke exhaust loss, causing energy waste, while increasing the investment in environmental protection equipment, which cannot meet the actual use needs.

[0004] Therefore, it is necessary to provide an ember burning and waste heat integrated furnace to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the embodiments of the present utility model is to provide an ember burning and waste heat integrated furnace, aiming to solve the technical problems raised in the background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A waste heat integrated furnace with embers includes a furnace body, a support column is arranged on the furnace body for support, the furnace body as a whole adopts a full membrane wall structure, and a first chamber, a second chamber, a third chamber and a fourth chamber which are interconnected one by one are arranged in the furnace body, and the furnace body as a whole adopts natural circulation;

[0008] A steam drum is provided on the top of the furnace body, on which a downcomer for supplying water to each membrane wall is provided, and an air guide pipe for discharging a steam-water mixture is also provided;

[0009] A smoke inlet and a smoke outlet are arranged on the furnace body, and the smoke inlet is arranged close to the first chamber, and the smoke outlet is arranged close to the fourth chamber.

[0010] As a further solution of the utility model, a burner for starting the furnace and a combustion-supporting air system for supplying air to accelerate combustion are arranged at the lower part of the smoke inlet.

[0011] As a further solution of the utility model, an explosion-proof door is provided on the top of the first chamber to ensure the safe operation of the equipment.

[0012] As a further solution of the utility model, the surrounding membrane walls and the top of the first chamber are covered with refractory castables for corrosion protection and stable combustion.

[0013] As a further solution of the utility model, ash hoppers for collecting and discharging smoke and dust are arranged at the bottom of the first chamber, the second chamber, the third chamber and the fourth chamber.

[0014] As a further solution of the utility model, flag-shaped convection tube bundles for ensuring safe operation of the equipment are arranged on the third chamber and the fourth chamber.

[0015] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art:

[0016] The utility model is a new product designed by comprehensively considering the secondary combustion chamber and the waste heat boiler. The secondary combustion chamber is changed from an insulating structure to a water-cooled structure, and the high-cost refractory masonry structure is no longer used. It is integrated with the waste heat boiler and the existing process is optimized at the same time. The existing "pyrolysis furnace + insulated secondary combustion chamber + waste heat boiler + environmental protection facilities" is optimized to a "pyrolysis furnace + ember waste heat integrated furnace + environmental protection facilities" process route.

[0017] The investment and maintenance costs of the secondary combustion chamber are greatly reduced. Taking the medical waste project as an example, the investment and maintenance costs of the original adiabatic secondary combustion chamber are greatly reduced. At the same time, it can achieve the effect of energy saving and consumption reduction, and save project land.

[0018] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0020] Figure numerals: 1. smoke inlet; 2. first chamber; 3. explosion-proof door; 4. burner; 5. combustion-supporting air system; 6. downcomer; 7. ash hopper; 8. steam drum; 9. air guide pipe; 10. flag-shaped convection tube bundle; 11. smoke outlet; 12. refractory castable; 13. second chamber; 14. third chamber; 15. fourth chamber; 16. furnace body; 17. support column. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0023] See also Figure 1 A waste heat integrated furnace for burning embers comprises a furnace body 16, a supporting column 17 for supporting is arranged on the furnace body 16, the furnace body 16 as a whole adopts a full membrane wall structure, and a first chamber 2, a second chamber 13, a third chamber 14 and a fourth chamber 15 which are interconnected one by one are arranged in the furnace body 16, and the furnace body 16 as a whole adopts natural circulation;

[0024] A steam drum 8 is provided on the top of the furnace body 16, and a downcomer 6 for supplying water to each membrane wall is provided on the steam drum 8, and an air guide pipe 9 for discharging a steam-water mixture is also provided on the steam drum 8;

[0025] A smoke inlet 1 and a smoke outlet 11 are provided on the furnace body 16 , and the smoke inlet 1 is provided close to the first chamber 2 , and the smoke outlet 11 is provided close to the fourth chamber 15 .

[0026] Furthermore, ash hoppers 7 for collecting and discharging flue gas and dust are provided at the bottom of the first chamber 2 , the second chamber 13 , the third chamber 14 and the fourth chamber 15 .

[0027] The furnace body 16 adopts a full membrane wall structure and is divided into four chambers in total, namely the first chamber 2, the second chamber 13, the third chamber 14 and the fourth chamber 15. An ash hopper 7 is provided at the bottom of each chamber for collecting and discharging flue gas dust.

[0028] In addition, the furnace body 16 adopts natural circulation as a whole, and a steam drum 8 is provided on the top. Water is supplied to each membrane wall through the downcomer 6. The steam-water mixture is discharged through the air guide pipe 9 and enters the steam drum for steam-water separation, and the steam is supplied externally.

[0029] Furthermore, a burner 4 for starting the furnace and a combustion-supporting air system 5 for supplying air to accelerate combustion are provided at the lower part of the smoke inlet 1 .

[0030] Furthermore, an explosion-proof door 3 is provided on the top of the first chamber 2 to ensure safe operation of the equipment.

[0031] Preferably, the pyrolysis gas generated by the pyrolysis furnace enters the first chamber 2 through the smoke inlet 1, and an explosion-proof door 3 is provided on the top of the first chamber 2 to ensure the safe operation of the equipment;

[0032] In addition, a burner 4 is provided at the lower part of the smoke inlet, which is used when the furnace is started or the temperature of the first chamber 2 is low (medical waste is lower than 850 degrees, hazardous waste is lower than 1100 degrees). A combustion-supporting air system 5 is arranged at the lower part, and air is introduced through the system to ensure complete combustion of the pyrolysis gas.

[0033] Furthermore, the surrounding membrane walls and the top of the first chamber 2 are covered with refractory castables 12 for corrosion protection and stable combustion.

[0034] Preferably, the membrane walls around the first chamber 2 and the top are completely covered with refractory castables 12, which can effectively prevent the water-cooled wall tubes from being corroded and achieve the purpose of stabilizing combustion.

[0035] Furthermore, flag-shaped convection tube bundles 10 are arranged on the third chamber 14 and the fourth chamber 15 to ensure safe operation of the equipment.

[0036] The high-temperature flue gas generated by the combustion of pyrolysis gas in the first chamber 2 enters the second chamber 13, the third chamber 14, and the fourth chamber 15 in sequence for cooling, and the cooled flue gas is discharged through the smoke outlet 11. According to the requirements of the environmental protection facilities connected to the smoke outlet 11 on the inlet temperature, flag-type convection tube bundles 10 are arranged on the third chamber 14 and the fourth chamber 15 through thermal calculation to ensure the safe and stable operation of the connected environmental protection facilities.

[0037] It should also be noted that the arrangement of the flag-shaped convection tube bundle 10 greatly increases the convection heat exchange and reduces the volume of the integrated furnace;

[0038] Through special throttling treatment, the safety of natural circulation is ensured. The flag-shaped convection tube bundle 10 is welded with the membrane wall, which can naturally shrink and absorb thermal expansion, thereby ensuring the stability and safety of the equipment on the basis of improving the heat exchange efficiency.

[0039] In addition, the first group of flag-shaped convection tube bundles 10 in contact with the flue gas are treated with increased spacing to prevent slag from clogging.

[0040] It should be particularly noted that the components in this application are all universal standard parts or components well known to those skilled in the art, which effectively solve the technical problems raised in the background technology.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste heat integrated furnace, comprising a furnace body (16), on which a support column (17) is arranged for support, characterized in that: The furnace body (16) as a whole adopts a full membrane wall structure, and a first chamber (2), a second chamber (13), a third chamber (14) and a fourth chamber (15) which are interconnected one by one are arranged in the furnace body (16), and natural circulation is adopted in the furnace body (16) as a whole; A steam drum (8) is arranged on the top of the furnace body (16), a downcomer (6) for supplying water to each membrane wall is arranged on the steam drum (8), and an air guide pipe (9) for discharging a steam-water mixture is also arranged on the steam drum (8); The furnace body (16) is provided with a smoke inlet (1) and a smoke outlet (11), wherein the smoke inlet (1) is arranged close to the first chamber (2), and the smoke outlet (11) is arranged close to the fourth chamber (15).

2. The ember waste heat integrated furnace according to claim 1, characterized in that: A burner (4) for starting the furnace and a combustion-supporting air system (5) for supplying air to accelerate combustion are arranged at the lower part of the smoke inlet (1).

3. The ember waste heat integrated furnace according to claim 1, characterized in that: An explosion-proof door (3) is provided on the top of the first chamber (2) to ensure safe operation of the equipment.

4. The ember waste heat integrated furnace according to claim 3, characterized in that: The membrane walls around and the top of the first chamber (2) are covered with refractory castables (12) for corrosion protection and stable combustion.

5. The ember waste heat integrated furnace according to claim 1, characterized in that: Ash hoppers (7) for collecting and discharging smoke and dust are provided at the bottom of the first chamber (2), the second chamber (13), the third chamber (14) and the fourth chamber (15).

6. The ember waste heat integrated furnace according to claim 1, characterized in that: The third chamber (14) and the fourth chamber (15) are both provided with flag-shaped convection tube bundles (10) for ensuring the safe operation of the equipment.

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