WO2014023210A1

WO2014023210A1 - Flame path arc of coal pyrolysis furnace

Info

Publication number: WO2014023210A1
Application number: PCT/CN2013/080819
Authority: WO
Inventors: 王新民
Original assignee: 山西鑫立能源科技有限公司
Priority date: 2012-08-06
Filing date: 2013-08-05
Publication date: 2014-02-13
Also published as: CN102786954B; CN102786954A

Abstract

A flame path arc of a coal pyrolysis furnace is provided in a furnace cavity under a carbonization chamber, an internal combustion heating device, and a coke modifying device, and mainly comprises arches and a flame arch central ring wall. A high-temperature combustible waste gas channel 653 is formed in the middle of the flame arch central ring wall, one end of each arch is fixed on a flame arch central ring, the other end is fixed on a furnace body, the arches are distributed radially at intervals at a certain angle around the center of the frame arch central ring wall, the number of the arches being the same as the total number of the main and secondary flame paths of the internal combustion heating device, a third gas inlet branch pipe and an extension channel of a third heat storage cavity are spread in the wall of a previous flame arch, and a first air supplement pipe and a secondary air supplement pipe are spread in the wall of the next adjacent flame arch; and the spreading is performed repeatedly like that.

Description

Fire tunnel bow of coal pyrolysis furnace

The invention relates to a fire bow, in particular to a fire tunnel bow in a furnace cavity of a coal pyrolysis furnace.

Background technique

At present, coal pyrolysis furnaces (coking furnaces) on the market mostly use batch coking, and the process steps of proportioning, dewatering, coal feeding, preheating, carbonization, coke upgrading, and dry quenching are relatively independent. Continuous production, low production efficiency; In addition, the waste gas generated in the coal pyrolysis process contains many useful components, such as S, HC1 and other acid gases, ^1 ₃ alkaline gas, tar, benzene, naphthalene, washing oil Organic matter such as the class, the complete process for the utilization of waste gas export, recovery and purification is not completed.

This prompted the inventors to explore and innovate a complete process of continuous coking and recycling of waste gas for export, recovery and purification.

Summary of the invention

The invention provides a fire tunnel bow of a coal pyrolysis furnace, which not only supports the various devices in the furnace cavity of the coal pyrolysis furnace, but also provides a pipeline for each device in the furnace chamber of the coal pyrolysis furnace. layout.

The technical solution adopted to achieve the above objectives is:

A fire tunnel bow of a coal pyrolysis furnace is disposed in a furnace chamber below the carbonization chamber, the internal combustion heating device and the focal reforming device, and mainly comprises a strip bow and a fire bow center ring wall, and the fire bow center ring wall A high-temperature combustible exhaust passage is formed in the middle portion, and one end of the strip is fixed on the center ring of the fire bow, and the other end is fixed on the furnace body, and the strip is arranged around the center of the center wall of the fire bow at a certain angular interval, and the number is The total number of main and auxiliary internal fire passages of the internal combustion heating device is the same, wherein the wall of the upper fire bow is laid with the third gas entering the extension channel of the branch pipe and the third heat storage cavity, and the wall adjacent to the next next fire bow The primary air supply pipe and the secondary air supply pipe laid in the body are repeatedly laid.

The technical scheme of the invention not only provides support for the carbonization indoor ring wall in the furnace cavity of the coal pyrolysis furnace, but also the fire channel partition wall and the central ring wall of the internal combustion heating device, and at the same time, provides various pipelines for the internal combustion heating device.

DRAWINGS

The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

Figure 1 is an enlarged view of the portion F in Figure 15;

Figure 2 is a cross-sectional view taken along line X-X of Figure 1;

Figure 3 is a schematic view of a gas commutator according to the present invention; Figure 4 is a schematic view of the gas commutator of the present invention;

Figure 5 is a schematic cross-sectional view taken at c-c in Figure 14;

Figure 5-1 is a schematic view showing the connection of a gas commutator and a gas heater pipe network according to the present invention;

Figure 6 is a schematic cross-sectional view taken at z-z in Figure 11;

Figure 7 is a schematic cross-sectional view at w-w in Figure 11;

Figure 8 is a schematic cross-sectional view at y-y in Figure 11;

9 is a schematic view of a coke upgrading device of a coal pyrolysis furnace according to the present invention (a cross-sectional view taken along line u-u in FIG. 11); FIG. 10 is a schematic view of a fire tunnel bow of the coal pyrolysis furnace of the present invention (a FIG. 11 Sectional view at t);

Figure 11 is a schematic view showing the assembly of the present invention in a coal pyrolysis carbonization apparatus (enlarged view in Fig. 15);

Figure 12 is a schematic view of a dry quenching apparatus of a coal pyrolysis furnace according to the present invention (an enlarged view of H in Fig. 15);

Figure 13 is a schematic view showing the quenching bridge of the dry quenching device of the coal pyrolysis furnace according to the present invention;

Figure 14 is a schematic view showing the electrical connection of the industrial control center of the coal pyrolysis furnace according to the present invention;

Figure 15 is a general schematic view of a coal pyrolysis furnace according to the present invention.

detailed description

A specific embodiment of the fire tunnel bow of a coal pyrolysis furnace of the present invention is mainly described in the third section of the fourth section (see also the contents of the first section).

The first part of the furnace coal ratio and preparation

If 5 different coals are selected, they are gas coal, fat coal, coking coal, one-third coking coal, lean coal first mixed and then sieved and crushed until the broken particles reach 5mm or less to form coal into the furnace. The furnace is equally applicable to other coal blends of the ratio and particle size, and does not constitute a limitation on the coal powder required for the coal pyrolysis furnace of the present invention.

The second part is dewatering into the furnace

The dewatering of the coal entering the coal pyrolysis furnace is carried out in advance by the furnace coal dehydration device, thereby saving energy and reducing consumption.

The third part enters the coal into the coal, preheating, conditioning, cooling

After the dewatered coal is transported, the temperature generally drops to normal temperature, and the temperature may be lower. Therefore, it is necessary to preheat, adjust, and cool the coal entering the carbonization chamber before entering the carbonization chamber.

The first section enters the coal into the coal. The coal feeding device is used to input the coal into the furnace after dehydration.

Section 2 Preheating of the coal into the furnace The preheating unit is placed below the coal feeding unit and at the top of the coal pyrolysis furnace. The preheating device uses preheating to enter the furnace coal after the temperature has been lowered after delivery.

The third section of the preheated coal into the furnace adjustment chamber is placed in the upper part of the furnace is located in the lower part of the preheating device, and the furnace coal conditioning chamber is used to adjust the amount of furnace coal injected into the carbonization chamber of the coal pyrolysis furnace. . The fourth part is into the furnace coal pyrolysis (carbonization heating, coke modification, CD quenching)

The first section is into the furnace coal pyrolysis carbonization heating

As shown in Fig. 15, the coal pyrolysis carbonization device 6 is disposed in the middle of the furnace body 91, and mainly comprises a carbonization chamber 61, an external gas heating device 64, an internal combustion heating device 67, and a tunnel bow 65; as shown in Fig. 2: carbonization The chamber 61 is composed of a refractory heat conductive material, an inner ring wall 612 and an outer ring wall 611, and an annular space is formed around the outer circumference of the carbonized outdoor ring wall 611. The outer gas heating device 64 is mainly composed of several groups. (Group 9 of this example) The structure is the same as that of the first gas heater 62, the second gas heater 60, and the gas reversing device 66, and, as shown in Fig. 15, because the carbonization chamber 61 has a high height, the external gas heating device 64 is mainly divided into upper, middle and lower three-stage heating, and each section has nine sets of first gas heater 62 and second gas heater 60 having the same structure.

As shown in Fig. 6, the inside of the carbonization indoor ring wall 612 is an internal combustion heating device 67, and the internal combustion heating device 67 is mainly composed of several groups (the third group of this example) having the same structure of the third gas heater 68 and the fourth gas heater. 69 and quenching exhaust gas heater 63.

As shown in FIG. 1 and FIG. 2, the first gas heater 62 mainly includes a first combustion chamber 621, a first gas inlet branch 622, and a first heat storage heat exchanger 624.

As shown in FIG. 2, the first combustion chamber 621 is made of a refractory material, an outer wall of the furnace body 91, and a refractory heat conductive material made of a carbonized outdoor ring wall 611 and an outer fire wall partition 625 to form a relatively closed gas combustion. The fire passage, as shown in FIG. 1, the first gas inlet branch pipe 622 passes through the outer wall of the furnace body 91 to the first combustion chamber 621.

As shown in FIG. 1 and FIG. 2, the first heat storage heat exchanger 624 includes a first heat storage chamber 626, a first heat storage body 623, a first air inlet branch pipe 627, and a first combustion exhaust gas discharge branch pipe 628; The heat chamber 626 is disposed in the outer wall of the furnace body 91. The first heat storage body 623 is disposed in the first heat storage chamber 626. The first heat storage chamber 626 is connected to the bottom of the first combustion chamber 621, and the other end is respectively connected to the first chamber. An air enters the branch pipe 627 and the first combustion exhaust gas discharge branch pipe 628.

As shown in FIG. 2-4, a first one-way air valve 629 is disposed between the first air inlet branch 627 and the first heat storage chamber 626, and the first one-way air valve 629 allows air to enter the branch pipe 627 from the first air. And the first heat storage chamber 626 flows into the first combustion chamber 621; a first one-way exhaust valve 620 is disposed between the first combustion exhaust gas exhaust branch 628 and the first heat storage chamber 626, and the first one-way exhaust valve 620 allows the gas The combustion exhaust gas flows from the first combustion chamber 621 through the first regenerator 626, and finally from the first combustion exhaust gas discharge branch 628 (of course, using the gas reversing device 66 as described below, when the air main pipe 667 is connected to the first air pipe 6671 is turned on, the air main pipe 667 and the second air pipe 6763 are cut off; at the same time, the combustion exhaust gas main pipe 669 is also cut off from the first combustion exhaust gas pipe 6691, and the corresponding combustion exhaust gas main pipe 669 and the second combustion exhaust gas main pipe 6693 are in phase. Turning on, it can function as a substitute for the first one-way air valve 629 and the first one-way exhaust valve 620). Similarly, as shown in FIG. 2: The second gas heater 60 having the same structure mainly includes a second combustion chamber 601, a second gas inlet branch 602 and a second heat storage heat exchanger 604, and the second combustion chamber 601 is made of refractory material. The outer wall of the furnace body 91 and the refractory and heat conductive material are made into a carbonized outdoor ring wall 611 and an outer fire wall partition 625 to form a relatively closed gas combustion fire passage, and the second gas entering branch pipe 602 passes through the furnace body 91. The wall passes into the second combustion chamber 601.

As shown in FIG. 2 and FIG. 3, the second heat storage heat exchanger 604 includes a second heat storage chamber 606, a second heat storage body 603, a second air inlet branch pipe 607, and a second combustion exhaust gas discharge branch pipe 608. The heat chamber 606 is disposed in the outer wall of the furnace body 91, the second heat storage body 603 is disposed in the second heat storage chamber 606, the second heat storage chamber 606 is connected to the bottom of the second combustion chamber 601, and the other end is respectively connected to the first chamber. The second air enters the branch pipe 607 and the second combustion exhaust gas discharge branch pipe 608. A second one-way air valve 609 is disposed between the second air inlet branch pipe 607 and the second heat storage cavity 606, and the second one-way air valve 609 allows air to pass from The second air inlet branch 607 and the second regenerator 606 flow into the second combustion chamber 601; a second one-way exhaust valve 600 is disposed between the second combustion exhaust gas exhaust branch 608 and the second heat storage chamber 606, the second single The exhaust gas valve 600 allows the gas combustion exhaust gas to flow from the second combustion chamber 601 through the second regenerator 606, and finally from the second combustion exhaust gas discharge branch 608 (of course, using the gas reversing device 66 as described below, when the air mains 667 and first The gas pipe 6371 is cut off, the air main pipe 667 is connected to the second air pipe 6673, and at the same time, the combustion exhaust gas main pipe 669 and the first combustion exhaust gas pipe 6691 are also connected, and the corresponding combustion exhaust gas main pipe 669 and the second combustion exhaust gas main pipe are connected. 6693 is also cut off; it can function as a substitute for the second one-way air valve 609 and the second one-way exhaust valve 600).

As shown in FIG. 1 and FIG. 2, a top portion of the outer fire passage partition 625 between the first combustion chamber 621 and the immediately adjacent second combustion chamber 601 is provided with a combustion chamber through hole 6251, and the combustion chamber through hole 6251 will be the first combustion chamber. 621 and the immediately adjacent second combustion chamber 601 are connected to form an associated group. In this example, the external gas heating device 64 has a total of 18 outer fire passage partition walls 625 to form 9 groups of associated combustion groups; in addition, as shown in FIG. Because the carbonization chamber 61 has a high height, the external gas heating device 64 is mainly divided into upper, middle and lower three-stage heating, and each segment has nine sets of the first gas heater 62 and the second gas heater 60 having the same structure.

In summary, the gas heater and the heat storage heat exchange method are;

1. When the gas in the first combustion chamber 621 is burned, the net gas recovered by the waste gas recovery and purification enters the first combustion chamber 621 through the first gas inlet branch 622, and the first one-way air valve 629 is opened to allow air. The first air inlet pipe 627 and the first heat storage chamber 626 flow into the first combustion chamber 621; the first one-way exhaust valve 620 is closed, and the generated hot exhaust gas enters the second combustion chamber 601 through the combustion chamber through hole 6251. When the hot exhaust gas passes through the second regenerator 603 in the second regenerator 606, the second regenerator 603 absorbs and cools the hot exhaust gas, and the hot exhaust gas becomes a relatively low temperature exhaust gas from the second combustion exhaust gas. The discharge branch pipe 608 is discharged;

2. When the gas in the second combustion chamber 601 is burned, the net gas recovered by the waste gas recovery enters the second combustion chamber 601 through the second gas inlet branch 602, and the second one-way air valve 609 is opened, the air From the second air into the branch 607 passes through the second regenerator 606 into the second combustion chamber 601, and the air is heated by the heat released by the second regenerator 603 to become hot air to assist combustion of the gas in the second combustion chamber 601; at the same time, The second one-way exhaust valve 600 is closed, and the hot exhaust gas after the combustion of the gas in the second combustion chamber 601 enters the first combustion chamber 621 through the combustion chamber through hole 6251, and the hot exhaust gas passes through the first heat storage chamber 626. a heat storage body 623, the first heat storage body 623 absorbs heat and cools the hot exhaust gas, and the hot exhaust gas becomes a relatively low temperature low temperature exhaust gas discharged from the first combustion exhaust gas discharge branch pipe 628;

3. In the same way, the first step and the second step are alternately cycled.

As shown in Figure 1: On the outer wall of the furnace body 91 is also provided with a combustion chamber temperature monitoring hole 6201 and a combustion chamber observation hole 6202, the combustion chamber observation hole 6202 allows the technician to visually observe the gas combustion of each combustion chamber, the combustion chamber A combustion chamber temperature table 6203 is provided in the temperature monitoring hole 6201 for temperature monitoring of the combustion chamber to facilitate evaluation of the coal pyrolysis process.

As shown in Figure 14: The combustion chamber temperature table 6203 is connected to the industrial control center 90, and the temperature data of the combustion chamber temperature table 6203 is automatically collected by the industrial control center 90.

As shown in FIG. 3, FIG. 4, FIG. 5-1, the gas reversing device 66 includes an upper disc 661, a lower disc 662, a rotary reversing motor 663, an air blower 664, a gas blower 665, an exhaust fan 666, and a lower disc 662 respectively. Connected with an air main pipe 667 and a first air pipe 6371, a second air pipe 6673, a gas main pipe 668 and a first gas pipe 6681, a second gas pipe 6683, a combustion exhaust gas main pipe 669 and a second combustion exhaust gas pipe 6693, a combustion exhaust pipe 6691, wherein the second combustion exhaust pipe 6693 and the first combustion exhaust pipe 6691 are just opposite to the arrangement of the first air pipe 6671 and the second air pipe 6673 and the first gas pipe 6681 and the second gas pipe 6683 ( Figure 4, Figure 5-1).

As shown in Fig. 3, Fig. 15, Fig. 5-1: The upper plate 661 is attached to the upper plate 662, and the upper plate 661 is respectively provided with an air connecting pipe 6672, a gas connecting pipe 6682, a combustion exhaust pipe connecting pipe 6692, and a rotary commutating motor. The 663 drives the upper plate 661 to reciprocally rotate on the lower plate 662, so that the air main pipe 667 continuously switches on and off with the first air pipe 6671 and the second air pipe 6673, and the gas main pipe 668 continuously communicates with the first gas pipe 6681 and the second gas. The pipe branch 6683 performs the switching on and off, and the combustion exhaust gas main pipe 669 continuously switches on and off with the second combustion exhaust gas pipe 6693 and the first combustion exhaust gas pipe 6691 (with the first air pipe 6371 and the second air pipe 6673 and the first The switching of the gas pipe 6681 and the second gas pipe 6683 is just the opposite).

As shown in FIG. 1 and FIG. 5-1, two sets of surrounding pipes are further disposed on the outer circumference of the furnace body 91, including a first air surrounding pipe 6674, a first gas surrounding pipe 6684, a first combustion exhaust gas surrounding pipe 6694; The air surrounding pipe 6675, the second gas surrounding pipe 6685, and the second combustion exhaust gas surrounding pipe 6695.

As shown in FIG. 5-1, the first air pipe 6764 connects the first air pipe 6671 and the first air inlet pipe 627, and the first air pipe 6371, the first air pipe 6674, and the first air enter the branch pipe 627. The first heat storage chamber 626 and the first combustion chamber 621 form the same passage; at the same time, the first gas enclosure tube 6684 will be the first gas manifold 6681 and the first A gas inlet branch pipe 622 is coupled, and the first gas pipe 6681, the first gas pipe 6684, the first gas inlet pipe 622 and the first combustion chamber 621 form the same passage; at this time, the first combustion exhaust pipe 6694 is The first combustion exhaust gas branch pipe 6691 is coupled with the first combustion exhaust gas discharge branch pipe 628, and the first combustion exhaust gas branch pipe 6691, the first combustion exhaust gas discharge branch pipe 628, the first heat storage cavity 626 and the combustion chamber 621 form the same passage;

Similarly, the second air enclosure 6675 connects the second air branch 6673 and the second air inlet branch 607, and the second air branch 6673, the second air envelope 6675, the second air enters the branch 607, and the second heat storage. The cavity 606 and the second combustion chamber 601 form the same passage; at the same time, the second gas pipe 6685 connects the second gas pipe 6683 and the second gas inlet pipe 602, and the second gas pipe 6683 and the second gas pipe 6685, the second gas entering branch pipe 602 and the second combustion chamber 601 constitute the same passage; at the same time, the second combustion exhaust gas pipe 6695 connects the second combustion gas branch pipe 6693 with the second combustion exhaust gas discharge branch pipe 608, and will be the second The combustion exhaust gas branch 6693, the second combustion exhaust gas discharge branch pipe 608, the second heat storage chamber 606, and the second combustion chamber 601 constitute the same passage.

In addition, as shown in FIG. 14, the example further includes a gas reversing device controller 906 for controlling the rotary commutating motor 663, air fan 664, gas fan 665, and exhaust fan 666, and the reversing device electrical controller 906 is further The upper industrial control center 90 is connected. Of course, from the principle of electrical control, in this example, the rotary commutating motor 663, air fan 664, gas fan 665, and exhaust fan 666 can also be directly controlled by the industrial control center 90, so the gas exchange is set here. The device controller 906 does not constitute a limitation to the scope of protection of this example.

As shown in Fig. 1, Fig. 5-1 and Fig. 2 to Fig. 5, the heating method of the external gas heating device 64 is:

(1) The rotary commutating motor 663 of the gas reversing device 66 drives the upper disc 661 to rotate on the lower disc 662, the air main pipe 667 is connected to the first air branch pipe 6671, and the air main pipe 667 and the second air branch pipe 6673 are cut off; The gas main pipe 668 is also connected to the first gas pipe 6681, and the gas main pipe 668 and the second gas pipe 6668 are cut off; at the same time, the combustion exhaust gas main pipe 669 is cut off from the first combustion exhaust gas pipe 6691, and the corresponding combustion exhaust gas is cut off. The main pipe 669 is in an on state with the second combustion exhaust pipe 6693;

(2) The air fan 664 blows air into the air main pipe 667, and the air sequentially passes through the air connecting pipe 6672, the first air pipe 6371, the first air pipe 6674, and the first air inlet pipe 627 to enter the first heat storage chamber 626. The heat released by the first regenerator 623 heats the air and enters the first combustion chamber 621. At the same time, the gas fan 665 passes the waste gas to the purified gas to obtain the net gas into the gas main pipe 668, and the gas passes through the gas connecting pipe in turn. 6682, the first gas pipe 6681, the first gas pipe 6684, the first gas inlet pipe 622 enters the first combustion chamber 621 for combustion, and at the same time, because the combustion exhaust gas main pipe 669 is disconnected from the first combustion exhaust gas pipe 6691 The state, and the corresponding combustion exhaust gas main pipe 669 and the second combustion exhaust gas branch pipe 6693 are in an on state, so that the exhaust gas in the first combustion chamber 621 can only enter through the combustion chamber through hole 6251 in the upper portion of the outer fire passage partition wall 625. Going to the second combustion chamber 601, and then passing the second storage The second regenerator 603 in the hot chamber 606 is exhausted from the second combustion exhaust gas exhaust pipe 608, the second combustion exhaust gas pipe 6695, the second combustion exhaust gas pipe 6693, and the combustion exhaust gas pipe 669 through the exhaust fan 666;

(3) After a period of combustion, the rotary commutating motor 663 of the gas reversing device 66 drives the upper disc 661 to rotate in the opposite direction on the lower disc 662, and the air main pipe 667 is disconnected from the first air branch 6671, and the air main pipe 667 and the second air are cut. The branch pipe 6673 is in the ON state, and at the same time, the gas main pipe 668 and the first gas pipe branch 6681 are also cut off, the gas main pipe 668 and the second gas pipe branch 6668 are connected, and at the same time, the combustion exhaust gas main pipe 669 and the first combustion exhaust gas branch pipe 6691 Also connected, and the corresponding combustion exhaust gas main pipe 669 and the second combustion exhaust gas branch pipe 6693 are also in a state of being cut off;

(4) The air fan 664 blows air into the air main pipe 667, and the air sequentially passes through the air connecting pipe 6672, the second air pipe 6673, the second air pipe 6675, and the second air inlet pipe 607 to enter the second heat storage chamber 606. The heat released by the second regenerator 603 in the second regenerator 606 heats the air and enters the second combustion chamber 601. At the same time, the gas fan 665 passes the waste gas to the purified gas to obtain the net gas into the gas main pipe. 668, the gas passes through the gas connecting pipe 6682, the second gas pipe 6683, the second gas pipe 6685, and the second gas entering branch pipe 602 enters the second combustion chamber 601 for combustion, at the same time, because the combustion exhaust pipe 669 and the first A combustion exhaust gas branch 6691 is turned on, and the corresponding combustion exhaust gas main pipe 669 and the second combustion exhaust gas main pipe 6693 are in a phase cut state, so that the exhaust gas after the combustion of the gas in the second combustion chamber 601 can only pass through the upper portion of the outer fire passage partition wall 625. The combustion chamber through hole 6251 enters the first combustion chamber 621, and then passes through the first heat storage body 623 in the first heat storage chamber 626 to absorb heat and cool down. Thereafter, the first combustion exhaust gas discharge branch pipe 628, the first combustion exhaust gas pipe 6694, the first combustion exhaust gas branch pipe 6691, and the combustion exhaust gas main pipe 669 are discharged through the exhaust gas blower 666.

Therefore, the combustion principle of the external gas heating device 64 is that the exhaust gas generated after the combustion of the gas in the first combustion chamber 621 enters the second combustion chamber 601 from the combustion chamber through hole 6251, passes through the second combustion chamber 601 and the second thermal storage chamber 606. The second heat accumulator 603 is cooled after the rest of the heat absorption is discharged.

On the contrary, the exhaust gas generated after the combustion of the gas in the second combustion chamber 601 enters the first combustion chamber 621 from the combustion chamber through hole 6251, passes through the first heat storage body 623 in the first combustion chamber 621 and the first heat storage chamber 626, and the rest The heat is absorbed and cooled down.

In summary, the two-in-one operation mode of the gas through the gas reversing device and the heat storage heat exchange operation mode of the regenerative heat exchanger realize the alternate combustion of the two gas heaters, that is, the gas reversing device. Air is supplied to the combustion chamber of the first gas heater 62, and the net gas is combusted, while the hot exhaust gas after combustion is sucked from the combustion chamber of the second gas heater 60, and the hot exhaust gas is passed through the second storage of the second gas heater 60. The second heat storage body 603 in the heat exchanger 604 absorbs heat and cools down to a relatively low temperature exhaust gas discharge; similarly, the gas reversing device sends air and clean gas to the combustion chamber of the second gas heater 60. At the same time, the combusted hot exhaust gas is sucked from the combustion chamber of the first gas heater 62, and the hot exhaust gas is cooled by the first heat accumulator 623 in the first heat storage heat exchanger 624 of the first gas heater 62. It is discharged into a low-temperature exhaust gas having a relatively low temperature; the method of heating the air by utilizing the residual heat of the exhaust gas after the combustion of the gas not only serves to charge the exhaust gas after the combustion of the gas By utilizing, the combustion efficiency of the gas in the combustion chamber is improved, and the exhaust gas after the combustion of the gas is cooled to a certain extent, without consuming external energy, thereby saving energy and reducing consumption, and saving coking costs.

As shown in Figs. 6 and 15, the internal combustion heating device 67 is mainly composed of a plurality of groups (the third group of this example) having the same structure of the third gas heater 68, the fourth gas heater 69, and the quenching exhaust gas heater 63.

As shown in FIG. 11 and FIG. 8, the quenching exhaust gas heater 63 includes an inner fire passage 631, an air supply pipe 632, a primary air supply pipe 6321, a secondary air supply pipe 6322, an air supply ring 633, a center ring wall 634, and an internal fire. A track partition 635, a center passage 638, and an inner fire passage 631 are disposed on the fire tunnel bow 65.

As shown in FIG. 8, the inner fire channel 631 is mainly composed of a carbonized indoor annular wall 612 and a central annular wall 634 located in the carbonization indoor annular wall 612 and at least one inner fire passage partition 635 separated by at least one set of main internal fires. Lane 636 and sub-internal fire passage 637, as shown in Fig. 8, in this example, six main inner fire passages 636 and six sub-internal fire passages 637 are juxtaposed to form a total of six sets of inner fire passages 631.

As shown in FIG. 11, the auxiliary inner passage 637 is provided with an upper blocking partition 6371, and the lower inner partition 637 is divided into upper, middle and lower sections, that is, the upper auxiliary inner passage 6375, The middle section of the inner fire channel 6374 and the lower section of the inner fire channel 6373; the upper section of the inner fire channel 6375 and the main inner fire channel 636 are provided with an exhaust gas stringing hole 6303, and the upper section of the inner fire channel 6375 and A hot exhaust gas exhaust passage 6306 is opened at the top of the main inner fire passage 636, and the hot exhaust gas discharge passage 6306 communicates with the exhaust gas chamber 391 at the upper portion of the furnace body 91.

As shown in FIG. 11 and FIG. 8, a fire channel cross hole 6304 is disposed on the inner fire passage partition 635 between the lower sub-internal fire passage 6373 and the main inner fire passage 636, and the fire train string passage hole 6304 is adjacent to the lower plug partition plate 6372. Below, as shown in FIG. 8, six fire tunneling through holes 6304 respectively connect six lower sub-inside fire passages 6373 and main inner fire passages 636.

As shown in FIG. 11, the center ring wall 634 encloses a central passage 638, and a central partition 638 is provided with a passage partition 6382 at the level of the upper blocking partition 6371, and the central passage 638 is divided into upper and lower portions, that is, The lower portion forms a high temperature combustible exhaust gas into the passage 6383, and the upper portion forms a buffer zone 6381.

As shown in FIG. 9 and FIG. 11, the lower part of the center ring wall 634 is provided with a combustible exhaust gas inlet hole 639 penetrating the high-temperature combustible exhaust gas inlet passage 6383 and the main inner fire passage 636 and the lower sub-internal fire passage 6373. The exhaust buffer 6381 communicates with the main inner fire passage 636 and the exhaust gas inlet hole 6301 of the upper sub-internal fire passage 6375.

As shown in FIG. 11, FIG. 10 and FIG. 9, the air supply ring 633 is disposed on the furnace body 91, and the air supply pipe 632 leads to the air supply ring 633, the primary air supply pipe 6321, the secondary air supply pipe 6322 and the air supply ring. Lane 633 is connected, extending from below the bow 651 of the fireway bow 65 to the interior of the fireway partition 635 between the main and secondary inner fire lanes 636, 637.

As shown in FIG. 11 and FIG. 2, the primary air supply pipe 6321 is disposed inside the fire channel partition 635 between the main and auxiliary inner fire passages 636 and 637, and the outlet 6323 of the primary air supply pipe 6321 is located in the lower sealing partition 6372. Hereinafter, the main inner fire passage 636 and the lower sub-internal fire passage 6373 are respectively connected; as shown in FIG. 11, the secondary air supply duct 6322 is also disposed in the main and auxiliary inner fire passages 636 and 637. The interior of the fire channel partition 635, and the secondary air supply outlet 6234 of the secondary air supply pipe 6322 is located flush with the upper blocking partition 6371 or slightly higher than the upper blocking partition 6371, leading to the main inner fire channel 636.

As shown in FIG. 11 and FIG. 7, the middle sub-internal fire passage 6374 forms a relatively closed independent gas combustion chamber, and the upper middle sub-internal fire passage 6374 is adjacent to the next middle middle sub-inside fire passage 6374 through the combustion chamber passage 6305. One set, the combustion chamber passage 6305 is located below the upper blocking partition 6371 and passes through a main inner fire passage 636 between the upper middle sub-inside fire passage 6374 and the next middle middle sub-inside fire passage 6374, as shown in the figure. As shown in Fig. 7, six middle-stage inner fire passages 6374 pass through three combustion chamber passages 6305 to form three groups.

As shown in FIG. 11, FIG. 6, and FIG. 7, two middle-stage inner fire passages 6374 in the sub-internal fire passage 637 (that is, between the upper and lower blocking partitions 6371 and 6372) are provided with the same correlation of the same group. The three gas heaters 68 and the fourth gas heaters 69 have the same structure and combustion principle as the first combustion heater 62 and the second combustion heater 60 described above, and the third gas heater 68 includes the third. The combustion chamber 681, the third gas inlet branch pipe 682, the third heat storage chamber 686, the third heat storage body 683, the third air inlet branch pipe 687, and the third combustion exhaust gas discharge branch pipe 688.

As shown in FIG. 11 and FIG. 6, it is to be noted that the third combustion chamber 681 of the third combustion heater 68 is the middle sub-internal fire passage 6374, that is, relatively closed between the upper and lower blocking partitions 6371 and 6372. The gas burns the fire.

As shown in FIG. 11, FIG. 10, FIG. 9, the third gas inlet branch pipe 682 extends from the lower side of the bow 651 of the fire tunnel bow 65 and extends upward through the fire passage partition wall 635 to the third combustion chamber 681 (ie, the middle section). The third heat storage chamber 686 is disposed on the furnace body 91 below the strip 651, the third heat storage body 683 is disposed in the third heat storage chamber 686, and the third heat storage chamber 686 is extended at one end. The passage 6861 passes through the underside of the strip 651 of the fireway bow 65, extends upward through the interior of the fire compartment partition 635 to the bottom of the third combustion chamber 681, and the other end of the third regenerator 686 is connected to the third air inlet branch, respectively. 687 and a third combustion exhaust gas exit branch 688.

Similarly, the structure of the fourth gas heater 69 is the same as that of the third gas heater 68, and details are not described herein again, wherein the fourth combustion chamber 691 and the third combustion chamber 681 are connected to each other through the combustion chamber channel 6305 to form a group (Fig. 7)).

As shown in FIG. 5-1, the third gas entering branch pipe 682, the third air entering branch pipe 687, and the third combustion exhaust gas exhausting branch pipe 688 of the third combustion chamber 681 of the third combustion heater 68 respectively pass the first gas wall. The tube 6684, the first air enclosure pipe 6674, and the first combustion exhaust gas enclosure 6694 communicate with the first gas manifold 6681, the first air manifold 6671, and the first combustion exhaust manifold 6691.

As shown in FIG. 5-1, the fourth gas inlet branch 692, the third air inlet branch 697, and the third combustion exhaust gas exhaust branch 698 of the fourth combustion chamber 691 of the fourth combustion heater 69 pass through the second gas enclosure 6685, respectively. The second air enclosure pipe 6675 and the second combustion exhaust gas enclosure 6695 are in communication with the second gas manifold 6683, the second air branch 6673, and the second combustion exhaust pipe 6693. In summary, the third combustion heater 68 and the fourth gas heater 69 have almost the same combustion principle as the first combustion heater 62 and the second combustion heater 60, and are not described herein again.

The method of the internal combustion heating device 67 of the present example is that the upper sub-internal fire passage 6375 and the lower sub-internal fire passage 6373 and the main inner fire passage 636 are high-temperature combustible exhaust gas generated by dry quenching and quenching and combustion heating, and the middle section is internally heated. The fire channel 6374 is a net gas combustion heating which is additionally purified by waste gas recovery.

The method of the internal combustion heating device 67 of this example is: (1), when the high-temperature combustible exhaust gas enters from the high-temperature combustible exhaust gas entering the passage 6383 at the lower portion of the central passage 638, passes through the combustible exhaust gas inlet hole 639 and enters the main inner fire passage 636 and the lower sub-indoor fire. In the 6373, the temperature of the high-temperature combustible exhaust gas that has just entered is generally higher at 1000 °C to 1100 °C, but as the exhaust gas rises in the main inner fire passage 636 and the lower sub-internal fire passage 6373, the temperature is lowered. ;

(2) At this time, the air supplied to the main inner fire passage 636 and the lower sub-internal fire passage 6373 is supplied through the primary air supply pipe 6321, so that the high-temperature combustible exhaust gas obtains oxygen in the air to be burned, after all, the combustible gas in the high-temperature combustible gas The amount is constant and is not sufficient to provide the heat and temperature required for the coal pyrolysis of the carbonization chamber 61;

(3) Therefore, when the high-temperature combustible exhaust gas of the lower inner fire passage 6373 passes through the primary air-burning exhaust gas, it is wound into the main inner fire passage 636 through the fire train string passage hole 6304, and the high temperature in the main inner fire passage 636 The combustible gas and the burned exhaust gas are mixed together and rise in the main fire passage 636, and the mixed high-temperature combustible gas and the burned exhaust gas are supplied to the coal in the carbonization chamber 61 through the carbonization chamber annular wall 612 during the ascending process. Pyrolysis provides heat and works externally, and the temperature gradually decreases;

(4) Therefore, in the middle and upper part of the main inner fire passage 636, it is necessary to enter the supplementary air again through the secondary air supply pipe 6322, so that the mixed high-temperature combustible gas and the burned exhaust gas are further burned, which not only gives the carbonization chamber 61 coal heat. The solution provides the required heat and temperature, and can fully burn the high-temperature combustible gas, thereby improving the work efficiency of the high-temperature combustible gas combustion;

(5) In addition, since there is a buffer 6381 between the main inner fire passage 636 and the upper sub-internal fire passage 6375, the upper portion of the center annular wall 634 is provided with a through buffer buffer 6381 and a main inner fire passage 636 and an upper sub-inside fire passage 6375. The exhaust gas enters the hole 6301, and the exhaust passage hole 6303 is disposed on the fire passage partition 635 between the main inner fire passage 636 and the upper sub-internal fire passage 6375, and each of the main inner fire passages 636 and the upper sub-internal fire passages 6375 The two sides are completely interpenetrated, so that the exhaust gas after the second supplemental combustion can be completely mixed together, and the average temperature equalization between the main inner fire passage 636 and the upper sub-internal fire passage 6375 can be given to the upper portion of the entire carbonization chamber 61. Coal pyrolysis provides balanced heat and temperature;

(6), the exhaust gas after the second qi combustion is discharged into the exhaust chamber 391 of the upper part of the furnace body 91 through the main inner fire passage 636 and the hot exhaust gas discharge passage 6306 at the top of the upper auxiliary inner passage 6375;

(7) At the same time, in order to compensate for the insufficient amount of combustible gas in the high-temperature flammable gas, it is insufficient to provide the heat and temperature defects required for the coal pyrolysis of the carbonization chamber 61, and can be generated during the pyrolysis process of the coal. The full utilization of the waste gas provides the third gas burner 68, the third combustion chamber 681 of the fourth gas heater 69, and the fourth combustion chamber 691 with waste gas to be recovered. The cleaned net gas combustion, that is, the supplementary heating in the middle section of the inner fire channel 637, not only provides sufficient heat and temperature for the coal pyrolysis of the carbonization chamber 61, but also increases the utilization rate of the waste gas and reduces the emission to the atmosphere. Avoid air pollution and protect the environment.

Section 2 Focus Modification

Due to the coke formed after the pyrolysis of coal in the carbonization chamber, there is uneven heating and the size of the coke is not uniform. It is better to provide a certain temperature and time for the coke to make the cokes fully contact and heat transfer to each other. This requires a focal reforming device 610.

As shown in FIG. 12, FIG. 11, FIG. 9, FIG. 15, the reforming device 610 is disposed in the furnace body on the fire tunnel bow 65, and the focal reforming device 610 includes a lower portion of the carbonization chamber 6 to form a focal reforming chamber 6100. The lower part of the main inner fire passage 636 and the lower inner side fire passage 6373, the central annular wall 634 encloses the high-temperature combustible exhaust gas of the central passage 638 into the lower portion of the passage 6383, and the lower part of the central annular wall 634 is provided with a high-temperature combustible exhaust gas entering passage 6383 and the main The combustible exhaust gas of the inner fire passage 636 and the lower sub-internal fire passage 6373 enters the hole 639.

In addition, as shown in Figure 1: The outer wall of the furnace body 91 is provided with a reforming temperature monitoring hole 6101, and a reforming temperature table 6102 is arranged in the hole of the reforming temperature monitoring hole 6101. As shown in Fig. 14, the industrial control center 90 It is electrically connected to the focus modification temperature meter 6102, and the focus reform temperature signal of the autofocus modification temperature table 6102 is monitored.

The modification method of the present coke upgrading device is: externally, the external wall of the furnace is insulated by the refractory material, and the inside is heated from the combustible exhaust gas into the hole 639 to enter the lower part of the main inner fire channel 636 and the lower inner fire channel. In 6373, the residual heat of the high-temperature combustible exhaust gas itself is used to provide the heat and temperature required for the heat preservation, especially the temperature of the high-temperature combustible exhaust gas just entering is between 1000 ° C and 1100 ° C, which is just suitable for the reforming of the coke, so that the coke is in the reforming chamber. It stays for a certain period of time, and the coke bulk particles are in full contact with each other and heat transfer between them to achieve the purpose of uniform size of the coke block.

Section 3 Fire Road Bow

As shown in FIG. 11 and FIG. 10, since the carbonization indoor ring wall 612 and the fire channel partition 635 and the center ring wall 634 of the inner combustion heating device 67 are disposed in the cavity, the fire tunnel bow 65 is required to provide support thereof. Further, the inner combustion heating device 67 is provided with various pipes. As shown in FIG. 11 and FIG. 10, the fire channel bow 65 is disposed in the furnace chamber below the carbonization chamber 61, the internal combustion heating device 67, and the focal reforming device 610. It mainly includes several strips 651, a fire bow center ring wall 652, a high-temperature combustible exhaust passage 653 is formed in the middle of the fire bow center ring wall 652, the strip 651-end is fixed on the fire bow center ring wall 652, and the other end is fixed in the furnace. On the body 91, the strip 651 is arranged radially around the center of the fire ring center ring wall 652 at a certain angular interval. In this example, the fire bow 651 is 12 bows, and the number and the internal combustion heating device 67 are main and auxiliary internal fires. The total number of roads 636 and 637 is the same.

As shown in FIG. 11 and FIG. 10, a third gas inlet branch 682 and an extension passage 6861 of the third regenerator 686 are disposed in the wall of a fire bow 651, and are disposed in the wall of another adjacent fire bow 651. One supplemental gas tube 6321, secondary qi The pipe 6322 provides convenience for the pipeline laying of the internal combustion heating device 67. The six third gas inlet 682 and the third heat storage cavity 686 are respectively arranged in parallel in the wall of the six fire bows 651. The six primary air supply pipes 6321 and the secondary air supply pipes 6322 are arranged side by side in the wall of the fire bow 651, so that the various pipes of the internal combustion heating device 67 are arranged in an orderly manner without interference.

Section 4 CDQ

The modified coke has a higher temperature, generally between 1000 ° C and 1100 ° C. It is necessary to cool the high temperature coke to facilitate transportation and storage. A dry extinction device is required.

As shown in FIG. 12 and FIG. 13, the dry extinguishing device 7 is disposed under the fire tunnel bow 65, and includes a high temperature quenching chamber 71, a low temperature quenching chamber 72, a quenching bridge bow 73, a quenching exhaust fan 75; and a high temperature quenching chamber. 71 is disposed below the fire tunnel bow 65, the top of the high temperature quenching chamber 71 is in communication with the high temperature combustible exhaust passage 653; the quenching bridge bow 73 is disposed between the high temperature quenching chamber 71 and the low temperature quenching chamber 72, and the quenching bridge bow 73 includes a bridge bow 731, a plenum 74, a dry quenching loop 76, and a dry quenching duct 77; the six bridge arches are at a certain angle in the center of the high temperature quenching chamber 71 and the low temperature quenching chamber 72 at the dry quenching ring The passage 76 is arranged in a radial arrangement, and the middle portion of the bridge arch 731 forms a plenum 74. The plenum 74 is an inverted truncated cone-shaped chamber that is straight up and down. The top of the plenum 74 is provided with a hemispherical hood 78. The lower opening 79 of the plenum 74 faces the low temperature quenching chamber 72; the dry quenching duct 77 is disposed in the bridge 731, the dry quenching duct 77 is connected to the plenum 74, and the other end is connected to the dry quenching ring The passage 76, the dry blower ring 76 is connected to the quenching exhaust fan 75 through the air inlet pipe 761; the low temperature quenching chamber 72 At the bottom of the opening 721 is provided with a power valve 70.

As shown in Fig. 12, a quenching temperature monitoring hole 711 leading to the high temperature quenching chamber 71 is provided on the outer wall 91 of the furnace body, and a quenching temperature table 712 is provided in the quenching temperature monitoring hole.

As shown in FIG. 14, the quenching temperature table 712, the quenching exhaust fan 75 and the out-of-focus valve 70 are electrically connected to the industrial control center 90, and the industrial control center 90 automatically controls the quenching exhaust fan 75 and the out-of-focus valve 70 through quenching. The temperature meter 712 monitors the quenching temperature. The quenching temperature table 712, the quenching exhaust fan 75 and the out-of-focus valve 70 are electrically connected to the industrial control center 90 through the quenching device controller 907. Of course, in terms of electrical control principle, the quenching device controller 907 does not constitute in this example. Limitation on the scope of protection of this example.

The dry quenching method using the low-temperature combustion exhaust gas in the dry extinguishing device 7 of this example is:

(1) Introducing the first combustion heater 62 of the external gas heating device 64, the second combustion heater 60, and the third gas heater 68 of the internal combustion heating device 67 and the exhaust gas of the fourth gas heater 69 Quenching the exhaust fan 75, because the exhaust gas after the combustion of the gas naturally becomes a low-temperature exhaust gas having a relatively low temperature after being absorbed by the heat storage body;

(2) using the quenching exhaust fan 75 to sequentially circulate the low temperature exhaust gas through the air inlet pipe 761, the dry quenching air duct 76, and the dry quenching air duct 77 into the chamber of the wind collecting chamber 74, and the low temperature exhaust gas is concentrated in the chamber of the wind collecting chamber 74. Because the plenum 74 has a unique structure, the top hood 78 is hemispherical, and the middle chamber has an inverted truncated cone structure, so the low temperature exhaust gas will blow out from the lower opening 79. And blowing out into the low temperature quenching chamber 72, and then moving up into the high temperature quenching chamber 71, cooling the coke in the high temperature quenching chamber 71 and falling from the high temperature quenching chamber 71 to the low temperature quenching chamber 72, For example, the air-cooled form of coke is used for cooling, so it is called dry quenching.

(3) In addition, in this example, the dry-extinguishing device 7 can also produce a certain amount of high-temperature combustible gas during the dry-extinguishing process, because, first, the low-temperature exhaust gas contains a small amount of water, and the high-temperature coke after the coke reforming occurs. The chemical reaction produces some combustible gas; second, the low-temperature exhaust gas itself still has some partially combustible combustible gas; third, the high-temperature coke after the coke reforming itself still has a part of combustible gas, and the combustible gas enters the center of the flame bow upward. The high temperature combustible exhaust passage 653 in the middle of the wall 652 provides a source of air to the primary and secondary fire passages 636, 637 of the internal combustion heating unit 67 of the coal pyrolysis furnace.

The low-temperature exhaust gas in this example refers to the exhaust gas generated after the waste gas recovered and purified in the coal pyrolysis process is burned by the external gas heating device of the coal pyrolysis furnace and the gas heater in the internal combustion heating device. The exhaust gas is turned into a low-temperature gas after being cooled by the heat storage body in the heat storage chamber, and the dry-extinguishing device is also advantageous in that the incombustibility of the combustion exhaust gas itself is used instead of the existing inert gas for dry quenching, the device is simple, and the cost is low. The economic benefits are significant. Compared with the traditional wet quenching, this example does not cause a large amount of water gas to be discharged into the air because a large amount of water encounters high temperature coke. The air pollution is small, water is saved, and at the same time, the waste generated in the coal pyrolysis process can be generated. The gas is fully utilized.

Section 5 Continuous Coking Unit

In summary, a major advantage of the coal pyrolysis furnace is that it can continuously coke, replacing the traditional batch coking or soil coking, which has incomparable advantages compared with the traditional coking method.

Claims

1. A fire tunnel bow of a coal pyrolysis furnace, disposed in a furnace chamber below a carbonization chamber, an internal combustion heating device, and a coke reforming device, wherein: mainly comprising a strip bow and a fire bow center ring wall, The middle part of the ring wall of the fire bow forms a high-temperature combustible exhaust passage, and one end of the strip is fixed on the center ring of the fire bow, and the other end is fixed on the furnace body, and the strip is radiated at an angular interval around the center of the center wall of the fire bow. Dispersing arrangement, the quantity is consistent with the total number of main and auxiliary internal fire passages of the internal combustion heating device, wherein the wall of the upper fire bow is laid with a third gas entering the extension channel of the branch pipe and the third heat storage cavity, and the adjacent adjacent one is The primary air supply pipe and the secondary air supply pipe laid in the wall of the next fire bow are repeatedly laid.

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