Internally heated continuous carbonization furnace and ignition method thereof

Abstract

The invention discloses an internal heating continuous carbonization furnace and an ignition and starting method thereof. A discharge pipe and a discharge inlet pipe are respectively fixed on both sides of a furnace body, and the ends of the discharge pipe and the discharge inlet pipe are both welded with a first flange plate. A pipeline is arranged at one end of the furnace body, and second flange plates are welded at both ends of the pipeline, and an exhaust pipe is connected to the end of the pipeline. The invention drives dust to move upward through the airflow inside the furnace body, so that the gas enters the pipeline through the discharge pipe, and the dust is filtered through a dust filter bag. Then the airflow returns to the furnace body through the discharge inlet pipe for reuse. When the pressure inside the furnace body increases, the electromagnetic valve is closed to discharge the airflow through the exhaust pipe. The ignition and starting method of the invention is simple to operate and has high safety performance, reduces the risk during the start-up period, increases the start-up time, saves the start-up cost, accelerates the output time of the carbonization furnace for improving the quality of coal, improves the start-up environment, and improves the economic benefits of the enterprise.

Description

Technical Field

[0001] The invention belongs to the technical field of carbonization furnaces, in particular to an internal heating type continuous carbonization furnace. Background Art

[0002] The continuous carbonization furnace is a highly efficient, energy-saving and environmentally friendly carbonization equipment. The equipment is suitable for carbon-containing wood materials (granular with a volume of less than 15mm) such as sawdust, rice husks, peanut shells, plant straw, bark, etc., which are distilled and carbonized without oxygen under high temperature conditions in the furnace with high carbonization rate.

[0003] In the process of carbonization of existing materials, the dust that generally appears is discharged directly with the rising airflow, and the combustion gas is also discharged. It is not possible to collect dust and recycle gas well, and there is no matching sealing structure, so the use effect is not good. In addition, the carbonization furnace of the current domestic coking plant needs to use soft wood and electric heating wire for heating and ignition. First, bundle the soft wood outside the furnace, put it into the furnace, and spread the soft wood on the blue charcoal with a thickness of about 100mm, and then spray it with diesel; prepare 3000W electric heating wires in advance, a total of 24. The heating wires are divided into 6 groups of 4 and fixed on the 16mm black leather wire, with a joint every 400-500mm, and then thrown out of the furnace from the thermocouple mounting holes on both sides; prepare a 220V power interface and pay attention to insulation; spread the selected flammable firewood on the blue charcoal for about 50mm, connect the prepared heating wire to the 16 square millimeter power line, with 728mm as a joint, and the contact section surface is not more than 10mm. One carbonization chamber requires 4 3000W heating wires. After parallel connection, the two ends are led out of the carbonization furnace from the middle temperature measuring hole, connected to the power line, and turn on the power switch.

[0004] Medium-sized firewood is placed on thin firewood, and large firewood is placed on medium firewood. When laying firewood, each layer is laid perpendicularly to each other with a thickness of about 300mm; there is no gap between the top layer of large firewood to prevent broken coal from falling in. After laying firewood, diesel is sprayed, and 25kg of diesel is required; coal is placed on the wood. This type of furnace ignition method is very primitive, takes a long time to start the furnace, has a high cost of starting the furnace, and takes a long time to carbonize, which cannot meet the requirements of modern production technology. Summary of the invention

[0005] The object of the present invention is to overcome the deficiencies in the prior art and to provide an internally heated continuous carbonization furnace and an ignition method thereof.

[0006] The object of the present invention is achieved as follows: an internal heating continuous carbonization furnace, comprising a carbonization furnace main body and a furnace body, characterized in that: a discharge pipe, a discharge inlet pipe and a plurality of burners are fixed on both sides of the furnace body, the burners are provided with two layers, the ends of the discharge pipe and the discharge inlet pipe are welded with a first flange, one end of the furnace body is provided with a pipeline, and both ends of the pipeline are welded with a second flange, the end of the pipeline is connected to an exhaust pipe, a pressure detector is installed on the outside of the furnace body, an electromagnetic valve is installed on one end of the pipeline, a discharge port and a discharge inlet are respectively provided inside the discharge pipe and the discharge inlet, and a first spring and a second spring are respectively fixed inside the discharge port and the discharge inlet, and pistons are fixed at the ends of the first spring and the second spring.

[0007] The outer sides of the first flange and the second flange are both provided with corresponding mounting holes, and the pipeline is detachably connected with the discharge pipe and the discharge inlet pipe through the first flange and the second flange.

[0008] A dust filter bag is arranged on one side of the interior of the pipeline close to the discharge pipe.

[0009] The electromagnetic valve and the pressure detector are both electrically connected to an external controller.

[0010] The diameter of the piston is larger than the diameters of the discharge port and the discharge port.

[0011] The electromagnetic valve is located on the right side of the exhaust pipe.

[0012] A method for igniting and starting an internal heating continuous carbonization furnace, characterized in that it comprises the following steps: Step 1), opening the gas valve on the burner to input gas into the furnace body, observing the pressure on the pressure detector, and igniting when the pressure is 1 KPa-2 KPa; when the pressure is less than 1 KPa, continuously inputting gas into the furnace body until the pressure reaches 1 KPa-2 KPa, and when the pressure is greater than 2 KPa, closing the electromagnetic valve to discharge the gas in the furnace body from the discharge pipe to reduce the pressure to less than 2 KPa; then igniting;

[0013] Step 2) Use the electronic igniter to go within 1m-1.5m of the burner, start the electronic igniter, observe from the fire viewing hole of the burner that there is an open flame at the burner, then turn off the electronic igniter, pull the electronic igniter out of the furnace body, and turn off the burner;

[0014] Step 3) Use the same steps to ignite all the burners on the lower layer, and then ignite the burners on the upper layer in the same way until ignition is complete.

[0015] The present invention has the following positive effects: Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention drives the dust upward through the airflow inside the furnace body, so that the gas enters the pipeline through the discharge pipe, and the dust is filtered through the dust filter bag, and then the airflow returns to the furnace body through the discharge pipe for repeated use. When the pressure inside the furnace body increases, the electromagnetic valve is closed, and the airflow is discharged through the exhaust pipe;

[0017] 2. The present invention uses the first spring and the second spring to pull the piston, and the piston blocks the discharge port and the discharge port. When no gas enters the pipeline, the inside of the furnace body maintains a sealed structure to assist the carbonization operation.

[0018] 3. The ignition and furnace start-up method of the present invention is simple to operate and has high safety performance, reduces the risks during furnace start-up, increases furnace start-up time, saves furnace start-up costs, speeds up the output time of high-quality coal in the carbonization furnace, improves the furnace start-up environment, and improves the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the present invention; Figure 2 It is a schematic diagram of the local structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the outlet pipe and the discharge inlet pipe of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the pipeline and the dust filter bag of the present invention. DETAILED DESCRIPTION

[0022] Embodiment 1, as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, an internal heating continuous carbonization furnace includes a carbonization furnace body 1 and a furnace body 2. A discharge pipe 3, a discharge pipe 4 and a plurality of burners 17 are fixed on both sides of the furnace body 2. The burners 17 are arranged in two layers. The burners arranged in the two layers can ignite the burner positions from the upper and lower layers, which can greatly improve the carbonization efficiency, and will not cause the material to be stuck due to the unburned wood, saving the furnace start-up time and reducing the production cost. It takes about 168 hours from ignition to qualified quality coal for the electric heating wire wood furnace start-up, while this furnace start-up method can improve the quality of coal after 24 hours, which greatly saves production costs, improves work efficiency, and improves the on-site operating environment. The ends of the discharge pipe 3 and the discharge inlet pipe 4 are both welded with a first flange 5, one end of the furnace body 2 is provided with a pipe 6, and both ends of the pipe 6 are welded with a second flange 7, the end of the pipe 6 is connected to an exhaust pipe 8, a pressure detector 9 is installed on the outside of the furnace body 2, and an electromagnetic valve 10 is installed at one end of the pipe 6, and the inside of the discharge pipe 3 and the discharge inlet pipe 4 are respectively provided with a discharge port 11 and a discharge port 12, and the inside of the discharge port 11 and the discharge port 12 are respectively fixed with a first spring 13 and a second spring 14, and the ends of the first spring 13 and the second spring 14 are both fixed with a piston 15.

[0023] The present invention uses the first spring 13 and the second spring 14 to pull the piston 15, and the piston 15 blocks the discharge port 11 and the discharge port 12. When no gas enters the pipe 6, the inside of the furnace body 2 maintains a sealed structure to assist the carbonization operation. The outer sides of the first flange 5 and the second flange 7 are both provided with corresponding mounting holes, and the pipe 6 is detachably connected to the discharge pipe 3 and the discharge pipe 4 through the first flange 5 and the second flange 7. The internal heating type continuous carbonization furnace passes the bolts through the mounting holes through the provided mounting holes, and is fixed with nuts and bolts, so that the pipe 6 and the furnace body 2 are detachably connected for maintenance and replacement. A dust filter bag 16 is provided on one side of the pipe 6 near the discharge pipe 3. The internal heating type continuous carbonization furnace uses the dust filter bag 16 to block the dust in the airflow by the dust filter bag 16, so that the first flange 5 and the second flange 7 can be removed to treat the dust. The electromagnetic valve 10 and the pressure detector 9 are both electrically connected to the external controller.

[0024] When the pressure detector 9 detects that the pressure inside the furnace body 2 is close to the threshold value, the electromagnetic valve 10 is closed to discharge the gas through the exhaust pipe 8. The diameter of the piston 15 is larger than the diameter of the exhaust port 11 and the exhaust port 12. The internal heating continuous carbonization furnace discharges gas from the exhaust port 11 and the exhaust port 12, so that the piston 15 blocks the position of the exhaust port 11 and the exhaust port 12, and when the pressure inside the furnace body 2 is normal, the inside of the furnace body 2 is fully carbonized. The electromagnetic valve 10 is located on the right side of the exhaust pipe 8.

[0025] This internal heating continuous carbonization furnace closes the electromagnetic valve 10 when the internal pressure of the furnace body 2 reaches the boundary value, allowing the gas to be discharged through the exhaust pipe 8. Under normal pressure, the electromagnetic valve 10 is opened, and the gas returns to the furnace body 2 for full utilization.

[0026] Working principle: insert the dust filter bag 16 into the left side of the pipeline 6, and then make the first flange 5 and the second flange 7 press the dust filter bag 16, the exhaust pipe 8 can be connected to the water spray cooling dust removal equipment, and the connection is carried out according to the carbonization operation to treat the carbonized material, and then start the carbonization furnace body 1. After the carbonization furnace is heated and produces gas, the gas drives the dust inside the furnace body 2 to move and squeeze toward the discharge pipe 3. The gas squeezes the left piston 15, causing the piston 15 to impact the first spring 13 and stretch it, and then the gas and dust pass through the dust filter bag 16, and the dust is collected inside the dust filter bag 16, and then through the discharge pipe 4, the airflow impacts the right piston 15, causing the piston 15 to stretch the second spring 14, so that the airflow enters the furnace again. When the pressure detector 9 detects that the pressure inside the furnace body 2 is close to the limit value, the electromagnetic valve 10 is closed to allow the gas to enter the water spray cooling dust removal equipment through the exhaust pipe 8, and then be discharged.

[0027] A method for igniting and starting an internally heated continuous carbonization furnace, characterized in that it comprises the following steps:

[0028] Step 1), open the gas valve on a burner on the lower furnace body to input gas into the furnace body, observe the pressure on the pressure detector, and ignite when the pressure is 1 KPa-2 KPa; when the pressure is less than 1 KPa, continue to input gas into the furnace body until the pressure reaches 1 KPa-2 KPa, and when the pressure is greater than 2 KPa, close the electromagnetic valve to discharge the gas in the furnace body from the discharge pipe to reduce the pressure to less than 2 KPa; then ignite; during the ignition period, the pressure in the furnace body is between 1 KPa-2 KPa;

[0029] Step 2) Use the electronic igniter to go within 1m-1.5m of the burner, start the electronic igniter, observe from the fire viewing hole of the burner that there is an open flame at the burner, then turn off the electronic igniter, pull the electronic igniter out of the furnace body, and turn off the burner;

[0030] Step 3) Use the same steps to ignite all the burners on the lower layer, and then ignite the burners on the upper layer in the same way until ignition is complete.

Claims

1. An internal heating continuous carbonization furnace, comprising a carbonization furnace body and a furnace body, characterized in that: A discharge pipe, a discharge inlet pipe and a plurality of burners are fixed on both sides of the furnace body, the burners are provided with two layers, the ends of the discharge pipe and the discharge inlet pipe are both welded with a first flange, one end of the furnace body is provided with a pipeline, and both ends of the pipeline are welded with a second flange, the end of the pipeline is connected to an exhaust pipe, a pressure detector is installed on the outside of the furnace body, an electromagnetic valve is installed on one end of the pipeline, a discharge port and a discharge inlet are respectively provided inside the discharge pipe and the discharge inlet, and a first spring and a second spring are respectively fixed inside the discharge port and the discharge inlet, and pistons are fixed at the ends of the first spring and the second spring; The outer sides of the first flange and the second flange are both provided with corresponding mounting holes, and the pipeline is detachably connected with the discharge pipe and the discharge inlet pipe through the first flange and the second flange; A dust filter bag is arranged on one side of the interior of the pipeline close to the discharge pipe.

2. The internal heating continuous carbonization furnace according to claim 1, characterized in that: The electromagnetic valve and the pressure detector are both electrically connected to an external controller.

3. The internal heating continuous carbonization furnace according to claim 1, characterized in that: The diameter of the piston is larger than the diameters of the discharge port and the discharge port.

4. The internal heating continuous carbonization furnace according to claim 1, characterized in that: The electromagnetic valve is located on the right side of the exhaust pipe.

5. A method for igniting and starting the internal heating continuous carbonization furnace according to claim 1, characterized in that: The following steps are involved: Step 1), open the gas valve on a burner on the lower furnace body to input gas into the furnace body, observe the pressure on the pressure detector, and ignite when the pressure is 1 KPa-2 KPa; when the pressure is less than 1 KPa, continue to input gas into the furnace body until the pressure reaches 1 KPa-2 KPa, and when the pressure is greater than 2 KPa, close the electromagnetic valve to discharge the gas in the furnace body from the discharge pipe, so that the pressure drops to less than 2 KPa; then ignite; Step 2) Use the electronic igniter to go within 1m-1.5m of the burner, start the electronic igniter, observe from the fire viewing hole of the burner that there is an open flame at the burner, then turn off the electronic igniter, pull the electronic igniter out of the furnace body, and turn off the burner; Step 3) Use the same steps to ignite all the burners on the lower layer, and then ignite the burners on the upper layer in the same way until ignition is complete.

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