Vehicle bottom type carbon roasting furnace

Abstract

The invention discloses a car bottom type carbon roasting furnace, which belongs to the technical field of heat treatment furnaces, and comprises a furnace car and a fixed furnace body arranged above the furnace car, the top of the fixed furnace body is provided with a circulating fan, the left side of the circulating fan is provided with a spraying device, and the two sides of the circulating fan are provided with a plurality of combustion nozzles side by side. A smoke exhaust pipeline for exhausting smoke is arranged at the tail part of the fixed furnace body; a heat preservation and insulation module is further arranged in the fixed furnace body. A furnace door and a water-cooling door frame are arranged on the front portion of the fixed furnace body. According to the invention, a smoke combustion mode of saggar-exhaust pipe-storage tank-combustor is completely abandoned, and a mode of discharging smoke volatile matter to the incinerator for direct combustion is adopted, so that the comprehensive energy consumption is below 3.6 * 10 < 6 > kJ, and the energy consumption level of a domestic ring type roasting furnace is completely reached. Meanwhile, the gas leakage amount is extremely small, the temperature distribution in the furnace is uniform, the product homogeneity is good, and operation automation, temperature control precision, fuel utilization maximization and finished product high normalization are achieved.

Description

Technical Field

[0001] The invention relates to a vehicle bottom type carbon roasting furnace, belonging to the technical field of heat treatment furnaces. Background Art

[0002] The heat treatment of carbon products needs to go through four stages: preheating, heating, insulation and cooling. During the heating stage, the products will produce a large amount of volatile asphalt smoke. During this period, the heating rate of the products must be strictly controlled to avoid cracks caused by excessive local stress due to local temperature unevenness. At the same time, the oxygen content in the furnace must be strictly controlled during this period to keep the furnace in a reducing atmosphere to prevent the volatile asphalt smoke from deflagration, causing the temperature in the furnace to get out of control and even endangering production safety.

[0003] At present, my country's graphite electrode material roasting generally adopts a covered ring roasting furnace, which has the characteristics of low energy consumption and large output. However, the temperature difference of the covered ring roasting furnace is above 100°C. The large temperature difference leads to uneven internal stress of the product and cracks, affecting the quality and service life of the product.

[0004] The prior art discloses a vehicle-type roasting furnace and a method of use of the application number 201410274692.9. The roasting furnace disclosed in the invention is a rectangular closed steel structure, wherein a plurality of saggers with exhaust pipes are arranged in the roasting furnace, a volatile matter storage tank is arranged on the top of the furnace and connected to the burner, and the volatile matter generated in the sagger enters the storage tank through the exhaust pipe for secondary combustion utilization to achieve the purpose of saving fuel, but the technology has the problems of complex structure, high difficulty in operation, frequent manual removal of the exhaust pipe, and high labor intensity. Summary of the invention

[0005] The present invention provides a vehicle bottom type carbon roasting furnace to solve the above technical problems.

[0006] The present invention provides a car-bottom carbon roasting furnace, comprising a furnace car and a fixed furnace body installed above the furnace car, a circulating fan is provided on the top of the fixed furnace body, a spray device is provided on the left side of the circulating fan, and a plurality of combustion nozzles are arranged side by side on both sides of the circulating fan, a smoke exhaust pipe for exhausting smoke is provided at the rear of the fixed furnace body; a thermal insulation module is also provided in the fixed furnace body; a furnace door is provided at the front of the fixed furnace body, and a water-cooled door frame is provided at the connection between the furnace door and the fixed furnace body.

[0007] A water seal groove is arranged on the top of the furnace car, and the furnace car is clamped with the fixed furnace body through the water seal groove.

[0008] A clean chimney is also provided on the top of the fixed furnace body.

[0009] The fixed furnace body is also provided with a smoke component detector and a thermocouple.

[0010] The thickness of the thermal insulation module is 150-350 mm.

[0011] A hanging ring is arranged on the top of the furnace door.

[0012] The above technical scheme is adopted, and the advantages of the present invention are: the flue gas combustion mode of sagger-exhaust pipe-storage tank-burner is completely abandoned, and the flue gas volatiles are discharged to the incinerator for direct combustion. The flue gas after combustion is heated by heat transfer oil, combustion-supporting cold air heat exchange and steam production and other multi-stage heat exchange methods to fully recover heat, and its comprehensive energy consumption reaches less than 3.6x106kJ, which fully reaches the energy consumption level of domestic ring roasting furnaces. At the same time, the furnace adopts a closed structure design, and the gas leakage is very small. Under the stirring of the circulating fan, the flue gas in the furnace is forced to convect, and the upper and lower temperature differences can be controlled within the range of ±10℃. The temperature distribution in the furnace is uniform, and the product homogeneity is good, which is difficult to match with other furnace types. The furnace door, water seal, smoke exhaust and spraying devices are all operated automatically, without manual on-site operation. The flue gas composition detector and the thermocouple are linked to the combustion nozzle to ensure that the furnace temperature and the set temperature error is ±0.5°C and the oxygen content in the furnace is less than 3%, thereby realizing automated operation, precise temperature control, maximum fuel utilization and high-standard finished products of the car-bottom carbon roasting furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the main structure diagram of the vehicle bottom type carbon roasting furnace of the present invention; In the figure: 1. Fixed furnace body, 2. Furnace car, 3. Thermal insulation module, 4. Water seal groove, 5. Furnace door, 6. Water-cooled door frame, 7. Smoke exhaust duct, 8. Circulating fan, 9. Spraying device, 10. Clean chimney, 11. Combustion nozzle, 12. Smoke composition detector, 13. Thermocouple. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0015] The terms "first", "second", etc. (if any) in the specification and claims of the present invention are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish before a certain technical feature, it does not necessarily indicate that "first" is present. It should be understood that in the present invention, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that in the present invention, "multiple" refers to two or more. "And / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "Including X, Y and Z", "Including X, Y, Z" means that X, Y, and Z are all included, "Including X, Y or Z" means that one of X, Y, and Z is included, and "Including X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included. Example

[0016] like Figure 1 As shown, the present invention provides a car bottom type carbon roasting furnace, comprising a furnace car 2 and a fixed furnace body 1 installed above the furnace car, characterized in that: a circulating fan 8 is provided on the top of the fixed furnace body 1, a spray device 9 is provided on the left side of the circulating fan 8, and a plurality of combustion nozzles 11 are arranged side by side on both sides of the circulating fan 8, and a smoke exhaust pipe 7 for exhausting smoke is provided at the tail of the fixed furnace body 1. A thermal insulation module 3 is also provided in the fixed furnace body 1. The thermal insulation module 3 is used to better maintain the temperature of the fixed furnace body. The thermal insulation module 3 of the furnace body lining is resistant to 900-1200°C. The temperature during the roasting process is generally not more than 900°C, but under non-steady-state conditions or partial combustion of volatiles, the temperature will exceed 1000°C; the thickness of the thermal insulation module 3 can be 150-350mm. A furnace door 5 is provided at the front of the fixed furnace body 1, and a water-cooled door frame 6 is provided at the connection between the furnace door 5 and the fixed furnace body 1. The furnace door 5 is a steel structure lined with a thermal insulation module. A lifting ring is provided on the top of the furnace door 5, and the vertical lifting of the furnace door 5 is achieved by an electric winch.

[0017] A water seal groove 4 is provided on the top of the furnace car 2 , and the furnace car 2 is clamped with the fixed furnace body 1 through the water seal groove 4 .

[0018] A clean chimney 10 is also provided on the top of the fixed furnace body 1 .

[0019] The fixed furnace body 1 is also provided with a flue gas component detector 12 and a thermocouple 13. The flue gas component detector 12 and the thermocouple 13 are controlled in conjunction with the combustion nozzle, and the combustion nozzle automatically adjusts the ratio of fuel gas to combustion-supporting air to always ensure that the oxygen content in the furnace is below 3%.

[0020] During operation, the furnace car loaded with products enters the fixed furnace body 1, the furnace door 5 is closed and pressed, the water seal groove 4 is lifted to the set height by the lifting device, the exhaust pipe 7 is closed, the bell valve is opened, the circulating fan 8 is started, the circulating water system is turned on, the fuel is injected into the combustion nozzle 11 and ignited, and the product enters the preheating stage; when the furnace temperature reaches 200°C, the bell valve is closed, the exhaust pipe 7 is opened, the combustion nozzle 11 automatically adjusts the combustion power and the air-fuel ratio according to the temperature setting curve and the oxygen content setting value, and the product enters the heating stage; when the furnace temperature reaches 850°C, the product enters the insulation stage, at which time the combustion nozzle 11 power reaches the maximum and the oxygen content is controlled at about 0.1%; after 12 to 24 hours of insulation, the combustion nozzle 11 is closed, the spray device 9 is turned on, the bell valve is opened, and the product enters the cooling stage and is ready to be taken out of the furnace. Example

[0021] like Figure 1 As shown, the present invention provides a car-bottom carbon roasting furnace, comprising a furnace car 2 and a fixed furnace body 1 installed above the furnace car, characterized in that: a circulating fan 8 is provided on the top of the fixed furnace body 1, a spray device 9 is provided on the left side of the circulating fan 8, and a plurality of combustion nozzles 11 are arranged side by side on both sides of the circulating fan 8, and a smoke exhaust duct 7 for exhausting smoke is provided at the rear of the fixed furnace body 1; a thermal insulation module 3 is also provided in the fixed furnace body 1; the thickness of the thermal insulation module 3 is 250 mm.

[0022] A furnace door 5 is provided at the front of the fixed furnace body 1, and a water-cooled door frame 6 is provided at the connection between the furnace door 5 and the fixed furnace body 1. The furnace door 5 is a steel component lined with a thermal insulation module.

[0023] A lifting ring is provided on the top of the furnace door 5, and the vertical lifting of the furnace door 5 is realized by an electric winch.

[0024] A water seal groove 4 is provided on the top of the furnace car 2 , and the furnace car 2 is clamped with the fixed furnace body 1 through the water seal groove 4 .

[0025] A clean chimney 10 is also provided on the top of the fixed furnace body 1 .

[0026] The fixed furnace body 1 is also provided with a flue gas component detector 12 and a thermocouple 13. The flue gas component detector 12 and the thermocouple 13 are controlled in conjunction with the combustion nozzle, and the combustion nozzle automatically adjusts the ratio of fuel gas to combustion-supporting air to always ensure that the oxygen content in the furnace is below 3%.

[0027] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A car bottom type carbon roasting furnace, comprising a furnace car (2) and a fixed furnace body (1) installed above the furnace car, characterized in that: A circulating fan (8) is provided on the top of the fixed furnace body (1), a spray device (9) is provided on the left side of the circulating fan (8), and a plurality of combustion nozzles (11) are arranged side by side on both sides of the circulating fan (8); a smoke exhaust duct (7) for exhausting smoke is provided at the rear of the fixed furnace body (1); a thermal insulation module (3) is also provided inside the fixed furnace body (1); a furnace door (5) is provided at the front of the fixed furnace body (1), and a water-cooled door frame (6) is provided at the connection between the furnace door (5) and the fixed furnace body (1).

2. The vehicle bottom type carbon roasting furnace according to claim 1, characterized in that: A water seal groove (4) is provided on the top of the furnace car (2), and the furnace car (2) is clamped with the fixed furnace body (1) via the water seal groove (4).

3. The vehicle bottom type carbon roasting furnace according to claim 1, characterized in that: A clean chimney (10) is also provided on the top of the fixed furnace body (1).

4. The vehicle bottom type carbon roasting furnace according to claim 1, characterized in that: The fixed furnace body (1) is also provided with a smoke component detector (12) and a thermocouple (13).

5. The vehicle bottom type carbon roasting furnace according to claim 1, characterized in that: The thermal insulation module (3) has a thickness of 150-350 mm.

6. The vehicle bottom type carbon roasting furnace according to claim 1, characterized in that: A hanging ring is provided on the top of the furnace door (5).

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