JP2002364816A - Heating and transfer apparatus for dry-distillation gas - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dry-distillation gas transfer apparatus which transfers dry-distillation gas from a carbonization furnace to a deodorization furnace without turning the gas into tar. SOLUTION: The apparatus is provided with the carbonization furnace 1 for carbonizing organic wastes and the deodorization furnace 11 for burning the dry-distillation gas generated in the furnace 1. A dry-distillation gas exhaust outlet 8, which is provided with an ejector 9, of the furnace 1 is permitted to communicate with a dry-distillation gas inlet 12 of the furnace 11 through an exhaust gas duct 10. An exhaust gas discharging system 14 of the furnace 11 is provided with a heat exchanger 16. The air heated in the heat exchanger 16 is supplied to the ejector 9 for actuation through an ejector air supply system 18, which is also provided to the apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for heating and transferring dry distillation gas, and relates to organic waste (rice husk, night soil sludge, livestock dung, etc.).
The present invention relates to a technique for transferring dry distillation gas generated when heat-treated pruned branches, garbage, residue, food residues, and the like.

[0002]

2. Description of the Related Art Conventionally, when carbonizing organic waste, a dried product of organic waste dried by a dryer at a preceding stage is put into a carbonization furnace, and the inside of the furnace is heated by indirect heating in the carbonization furnace. And carbonized. In a carbonization furnace, air in the furnace is driven out by steam of an inert gas supplied separately, and dry distillation carbonization is performed under high-temperature steam while maintaining the inside of the furnace in a reducing atmosphere. The dry distillation gas generated from the dried product in the carbonization furnace and the odor gas generated in the dryer are deodorized by burning the gas in the deodorization furnace.

[0003]

However, since the dry distillation gas generated in the carbonization furnace has a temperature of about 350 °, the use of mechanical means such as a fan as a means for blowing air from the carbonization furnace to the deodorization furnace is durable. There is a problem with sex. Further, the dry distillation gas contains various components, and when the temperature is lowered, it is tarified and adheres to the exhaust gas duct, acting as a resistance to the exhaust gas, and in some cases, closing the exhaust gas duct.

The present invention has been made to solve the above-mentioned problems, and has a dry-distilled gas heating and transfer method capable of transferring a dry-distilled gas from a furnace for heat treatment such as a carbonizing furnace to a gas-burning furnace such as a deodorizing furnace without tarring. It is intended to provide a device.

[0005]

In order to solve the above-mentioned problems, a dry distillation gas heating and transferring apparatus according to the present invention comprises a furnace for heat-treating organic waste and a furnace for gas-burning dry distillation gas generated in the furnace for heat treatment. In the system provided with, an ejector is provided at the dry gas outlet of the furnace for heat treatment which communicates with the dry gas inlet of the furnace for gas combustion via the exhaust gas duct, and a heat exchanger is provided for the exhaust gas discharge system of the furnace for gas combustion. And an ejector air supply system for supplying heated air heated by the heat exchanger to the ejector as driving gas.

[0006] With the above structure, the dry distillation gas generated in the furnace for heat treatment is sucked into the ejector along with the driving gas supplied through the ejector air supply system, flows into the furnace for gas combustion through the exhaust gas duct, and performs gas combustion. After being burned in the furnace, the gas is discharged to an exhaust gas discharge system of the furnace where the gas is burned as exhaust gas. Using the exhaust gas as a heat source, the drive gas for the ejector is heated by a heat exchanger and supplied to the ejector through an ejector air supply system.

Therefore, the dry distillation gas flowing from the furnace for heat treatment to the ejector flows into the furnace for gas combustion through the exhaust gas duct without being tarred because it is heated by the driving gas.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a carbonization furnace 1 is of a rotary kiln type, and is used for dry-distilling and carbonizing organic wastes such as rice husks, human waste sludge, livestock dung, pruned branches, garbage, sewage residues, and food residues. Is a dried product 2 by a process in a dryer (not shown) at the preceding stage.

The carbonization furnace 1 has an internal combustion tube 3 disposed therein.
Are connected. The carbonization furnace 1 has an inlet 5 for the dried product 2 at one end, and a carbide outlet 6 and a steam supply port 7 at the other end.

An ejector 9 is provided at a dry gas outlet 8 of the carbonization furnace 1, and the dry gas outlet 8 is connected to the exhaust gas duct 1.
0, it communicates with the dry gas inlet 12 of the deodorizing furnace 11. The deodorizing furnace 11 burns dry distillation gas and has a burner 13 on one side. An exhaust gas discharge system 14 of the deodorizing furnace 11 is provided with a waste heat boiler 15 and a heat exchanger 16 serving as an ejector air heating device, and a steam supply system 17 is provided between the waste heat boiler 15 and the steam supply port 7. Provided. The heat exchanger 16 is provided between the heat exchanger 16 and the ejector 9.
An ejector air supply system 18 is provided for supplying the heated air heated in step 1 to the ejector 9 as a driving gas, and an ejector fan 19 is provided at the base end of the ejector air supply system 18.

The operation of the above configuration will be described below. The organic waste is dried by the dryer at the former stage, and then is introduced into the carbonization furnace 1 from the introduction port 5 as the dried product 2. Carbonization furnace 1
Then, the steam generated in the waste heat boiler 15 is supplied to the steam supply system 1.
7, the air inside the furnace is expelled, the air inside the furnace is expelled, and in a state where the atmosphere is kept in a reducing atmosphere, the dried product 2 in the furnace is heated under high-temperature steam by indirect heating with the combustion gas of the burner 4 through the internal combustion tube 3. To dry carbonize.

The carbonized carbide is taken out of the furnace through the carbide outlet 6, the generated dry distillation gas is sucked into the ejector 9 and discharged from the dry distillation gas outlet 8 to the exhaust gas duct 10, and the deodorizing furnace 11 passes through the dry distillation gas inlet 12. Flows into The air supplied by the ejector fan 19 is heated to a predetermined temperature (about 400 ° C.) by the heat exchanger 16 and supplied to the ejector 9 as a driving gas. For this reason, carbonization furnace 1
Since the dry distillation gas flowing into the ejector 9 is heated by the driving gas, the exhaust gas duct 1 is not tarred.
0 and flows into the deodorizing furnace 11.

After the dry gas is burned in the deodorizing furnace 11, it is discharged as exhaust gas to the exhaust gas discharging system 14 of the deodorizing tower 11. This exhaust gas is passed through the heat exchanger 16 to the ejector 9.
It is used as a heat source for heating the driving gas of the gas.

[0014]

As described above, according to the present invention, the driving fluid of the ejector is heated by using the waste heat generated in the system, and the driving fluid is transported while heating the dry gas to thereby dry the ejector. The gas can be transferred from the furnace for heat treatment to the furnace for gas combustion without tarification, and the tar adhering to the exhaust gas duct can be prevented from becoming resistant and the exhaust gas duct can be prevented from being blocked.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a configuration of a dry gas heating and transferring device according to an embodiment of the present invention.

[Description of Signs] 1 Carbonization furnace 2 Dry material 3 Internal combustion tube 4 Burner 5 Input port 6 Carbide discharge port 7 Steam supply port 8 Drying gas discharge port 9 Ejector 10 Exhaust gas duct 11 Deodorizing furnace 12 Drying gas inlet 13 Burner 14 Exhaust gas discharge System 15 Waste heat boiler 16 Heat exchanger 17 Steam supply system 18 Ejector air supply system 19 Ejector fan

Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat II (reference) F23G 5/46 F23G 5/46 A F term (reference) 3K061 AA07 AB02 AC11 AC17 CA01 FA10 FA12 FA24 3K065 AA07 AA24 AB02 AC11 AC17 GA03 GA07 GA12 GA35 GA43 JA05 JA15 JA18 JA23 3K078 BA03 BA13 CA02 CA07 CA12 CA22 CA27 4H012 HA01 JA06 JA11

Claims (1)

[Claims] In a system comprising a furnace for heat-treating organic waste and a furnace for gas-burning dry gas generated in the furnace for heat-treating, a dry-gas inlet of the furnace for gas-burning through an exhaust gas duct is provided. An ejector is provided at the dry gas outlet of the furnace for communicating heat treatment, a heat exchanger is provided at the exhaust gas discharge system of the furnace for gas combustion, and an ejector air supply system that supplies heated air heated by the heat exchanger to the ejector as driving gas. A dry gas heating / transferring device characterized by comprising: