Composite pyrolyzing furnace

Abstract

The utility model belongs to the technical field of pyrolysis, and particularly relates to a composite pyrolyzing furnace. Comprising a furnace body, a first heating device, a second heating device and a third heating device, and the first heating device, the second heating device and the third heating device sequentially heat the furnace body in the moving direction of materials in the furnace body; the first heating device and the third heating device are heating chambers, the heating chambers are connected with combustors, and the second heating device is an electric heating device. The first heating device and the third heating device are arranged on the furnace body to heat the heating chamber, the second heating device is used for electric heating, substances in the pyrolyzing furnace are heated through the composite heating mode, the critical point temperature in the pyrolyzing process is directly reached through electric heating, and the temperature in other stages is increased through flue gas. And energy consumption is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pyrolysis technical field, especially a composite pyrolysis furnace. BACKGROUND

[0002] The pyrolysis furnace is a kind of pyrolysis material special device using rotary kiln body, kiln body additional temperature, insulating oxygen, generally using high-temperature flue gas heating furnace body and electric heating furnace body, and the equipment of pyrolysis of material.

[0003] The pyrolysis process is that material absorbs heat and heats up, and finally material absorbs radiant heat to critical temperature and starts pyrolysis, then material continues to slowly heat up with kiln body rotation operation and finally pyrolysis is completed.Because the raw material of pyrolysis material is not fixed or the variety of material is many, the critical point of pyrolysis temperature will change, and too high pyrolysis temperature will cause material coking, resulting in that material cannot be pyrolyzed, and kiln needs to be stopped for handling accident, in the prior art, the heating cost of flue gas heating mode is lowest, and the combustible gas after pyrolysis is utilized, but when the critical temperature is adjusted by flue gas temperature, the cycle is long, the reaction speed is slow, and accurate adjustment cannot be realized.Electric heating has the characteristics of high critical point temperature and accurate adjustment, but the power consumption of electric heating is high.It is difficult to accurately control high-temperature flue gas heating temperature and heating speed, and a long time is needed to reach temperature critical point, and a large amount of coking is easily generated in the furnace, and although electric heating can quickly break through temperature critical point, but the energy consumption is high during the whole process, and resources are wasted. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problems, overcome the insufficient of prior art, provide a kind of composite pyrolysis furnace that is heated by combustion chamber, then by electric heating, finally by combustion chamber heat preservation.

[0005] The utility model solves the technical problems and adopts the technical scheme that the composite pyrolysis furnace includes furnace body, first heating device, second heating device and third heating device, first heating device, second heating device and third heating device heat furnace body in the moving direction of material in furnace body in proper order;

[0006] First heating device and third heating device are heating chamber, and heating chamber is connected with burner, and second heating device is electric heating device.

[0007] Preferably, the length ratio of the first heating device and the third heating device to the second heating device is 10:1-10:3.

[0008] Preferably, the second heating device is arranged at the middle part of the length direction of the furnace body.

[0009] Preferably, the second heating device is arranged at the outer side of the furnace body.

[0010] Preferably, the length of the first heating device and the third heating device is selected according to the raw material and the structure of the furnace body.

[0011] Preferably, the burner is arranged inside the heating chamber.

[0012] Preferably, the burner is connected to the gas outlet of the furnace body through a gas supply pipeline.

[0013] Compared with the prior art, the technical scheme has the beneficial effects that:

[0014] The utility model discloses a composite pyrolysis furnace, which comprises a furnace body, a first heating device, a second heating device and a third heating device arranged in sequence along the moving direction of materials in the furnace body. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic view of the composite pyrolysis furnace.

[0016] Wherein: 1, furnace body 2, first heating device 3, second heating device 4, third heating device. DETAILED DESCRIPTION

[0017] Figure 1 is the best embodiment of the utility model, and the following will be combined with the attached Figure 1 The utility model is further explained.

[0018] Reference Figure 1 The composite pyrolysis furnace comprises a furnace body 1, a first heating device 2, a second heating device 3 and a third heating device 4, the first heating device 2, the second heating device 3 and the third heating device 4 are sequentially connected to the furnace body 1 along the moving direction of materials in the furnace body 1, the first heating device 2 and the third heating device 4 are both heating chambers, the heating chambers are connected with burners, and the second heating device 3 is an electric heating device.

[0019] In the embodiment, the length ratio of the first heating device 2 and the third heating device 4 to the second heating device 3 is 10:1-10:3. The second heating device 3 comprises heating resistance wires and is arranged at the middle part of the outer side of the furnace body 1, the first heating device 2 and the third heating device 4 are arranged at the two sides of the second heating device 3 respectively, and the length of the first heating device 2 is equal to that of the third heating device 4.

[0020] The burner is arranged inside the heating chamber, and part of the gas from the furnace body 1 outlet enters the first heating device 2 and the third heating device 4 through the pipeline, and the entering amount is controlled by the valve, and heat is provided to the furnace body 1 after combustion.

[0021] Working process:

[0022] The coal or biomass slowly advances through the material conveying channel in the furnace body 1, the gas in the furnace body 1 enters the first heating device 2 and the third heating device 4 through the pipeline respectively, the burner burns the entering gas to heat the furnace body 1, when the coal or biomass is combusted to a certain temperature, the second heating device 3 is controlled to rapidly heat, the temperature of the pyrolysis furnace is increased, the coal or biomass breaks through the critical point of the pyrolysis temperature, and then the third heating device 4 can maintain the temperature, thereby avoiding the long time required by the separate flue gas heating and the high energy consumption of the separate electric heating.

[0023] In other embodiments, the burner of the first heating device 2 and the third heating device 4 can also be arranged outside the heating chamber, and the high-temperature flue gas generated by combustion is used to heat the furnace body 1.

[0024] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to obtain equivalent embodiments. However, any simple modification, equivalent change and modification of the above embodiments without departing from the technical scheme of the present application, according to the technical essence of the present application, still belongs to the protection scope of the technical scheme of the present application.

Claims

1. A combined pyrolysis furnace, characterized by: It comprises a furnace body (1), a first heating device (2), a second heating device (3) and a third heating device (4), the first heating device (2), the second heating device (3) and the third heating device (4) heat the furnace body (1) in turn along the moving direction of the materials in the furnace body (1). The first heating device (2) and the third heating device (4) are heating chambers, and the heating chambers are connected with burners.

2. The combined pyrolysis furnace according to claim 1, characterized in that: The length ratio of the first heating device (2) and the third heating device (4) to the second heating device (3) is 10:1-10:

3.

3. The combined pyrolysis furnace according to claim 1, characterized in that: The second heating device (3) is arranged at the middle of the length direction of the furnace body (1).

4. The combined pyrolysis furnace according to claim 1, characterized in that: The second heating device (3) is arranged at the outside of the furnace body (1).

5. The combined pyrolysis furnace according to claim 1, characterized in that: The burner is arranged at the inside of the heating chamber.

6. The combined pyrolysis furnace according to claim 1 or 5, characterized in that: The burner is connected with the gas outlet of the furnace body through a gas supply pipeline.

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