CN112852456A

CN112852456A - Coking furnace for refining waste iron

Info

Publication number: CN112852456A
Application number: CN202110215093.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-05-28

Abstract

The invention discloses a coking furnace for refining waste iron, which comprises a coking furnace body, wherein an air inlet pipe is fixedly arranged on the left side of the coking furnace body, an air blower is fixedly arranged on the left side of the air inlet pipe, a flue gas exhaust pipe is fixedly connected to the top of the coking furnace body, a preheating furnace is fixedly arranged on the right side of the coking furnace body, a support is fixedly arranged at the bottom of the coking furnace body, a connecting pipe is fixedly connected to the right side of the flue gas exhaust pipe, a three-way switching valve is fixedly arranged on the pipe body of the connecting pipe, a flue gas heat exchange device is fixedly connected to the end part of the connecting pipe, and the top of the flue gas heat exchange device is fixedly arranged at. The flue gas calandria at this scheme utilization coking furnace body top conducts the flue gas among the combustion process and discharges, carries out reuse with the waste heat of flue gas through heat transfer device to preheat the preheater, thereby make the waste heat of flue gas can be utilized once more, reduced the consumption of the burning energy.

Description

Coking furnace for refining waste iron

Technical Field

The invention relates to the field of industrial kilns, in particular to a coking furnace for refining waste iron.

Background

Coking is an important part of coal chemical industry, and the main processing methods of coal are three methods of high-temperature coking, medium-temperature coking, low-temperature coking and the like. The metallurgical industry typically employs high temperature coking to obtain coke and recover chemical products. The coke can be used as fuel for blast furnace smelting, casting, non-ferrous metal smelting and water gas production, and can also be used for producing calcium carbide to obtain organic synthetic industrial raw materials.

The tail flue gas of the coking furnace is directly discharged through a chimney after flowing through a tail flue, a large amount of waste heat is carried in the flue gas, meanwhile, a large amount of harmful gases such as dust, sulfuration gas and the like are remained in the flue gas, and if the harmful gases are directly discharged and pollute the environment, energy is wasted.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide the coking furnace for the smelting of the waste iron.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A coking furnace for refining waste iron comprises a coking furnace body, wherein an air inlet pipe is fixedly arranged on the left side of the coking furnace body, an air blower is fixedly arranged on the left side of the air inlet pipe, a flue gas exhaust pipe is fixedly connected to the top of the coking furnace body, a preheating furnace is fixedly arranged on the right side of the coking furnace body, a support is fixedly arranged at the bottom of the coking furnace body, a connecting pipe is fixedly connected to the right side of the flue gas exhaust pipe, a three-way switching valve is fixedly arranged on a pipe body of the connecting pipe, a flue gas heat exchange device is fixedly connected to the end of the connecting pipe, the top of the flue gas heat exchange device is fixedly arranged at the bottom of the preheating furnace, a filtering device is fixedly connected to the back of the flue gas heat exchange device, a steam turbine is fixedly arranged on the right side of the filtering device, a generator set, the gas boiler is fixedly installed at the end of the discharge pipe, the fine filtering tower is fixedly installed on the right side of the gas boiler, and the discharge pipe is fixedly installed at the top of the fine filtering tower. Utilize the flue gas calandria at coking furnace body top to conduct the flue gas among the combustion process and discharge, carry out reuse through heat transfer device with the waste heat of flue gas, thereby preheat the preheater, filter the cigarette ash of big granule through utilizing filter equipment, the damage of flue gas particulate matter to steam turbine has been reduced, the heating through utilizing the potential energy of flue gas and gas boiler drives steam turbine, thereby there is generating set to produce the electric energy through the process, the flue gas has reduced harmful gas's emission through the processing of smart filter tower simultaneously.

Further, flue gas heat transfer device includes flue gas heat exchanger, flue gas heat exchanger's inside fixed mounting has the flue gas to pass through the coil pipe, the flue gas passes through the one end fixed connection of coil pipe at the tip of flue gas calandria, the flue gas passes through the other end fixed connection of coil pipe in filter equipment's front, flue gas heat exchanger's inside fixed mounting has a plurality of heat conduction dishes, the top fixed mounting of heat conduction dish is in the bottom of preheater. When the flue gas passes through the coil pipe, the heat conduction plate conducts the heat energy of the flue gas and transfers the heat energy to the inside of the preheating furnace, so that the heat energy utilization rate of the flue gas is improved, and the consumption of combustion resources is reduced.

Furthermore, the left side of the preheating furnace is fixedly connected with a connecting hopper, the top of the connecting hopper is fixedly provided with a switch valve, and the right side of the preheating furnace is fixedly provided with a sealing door. The connecting hopper is connected with the preheating furnace and the coking furnace body, the switch valve is used for controlling the switch, and the sealing door is used for opening and closing the preheating furnace.

Further, filter equipment includes the filter tower, the inside fixed mounting of filter tower has the card frame, movable mounting has the filter core on the support body of card frame, the bottom fixed mounting of filter tower has the scum discharge fill, the side fixed mounting of scum discharge fill has the scum valve, the left side fixed mounting of filter tower has the let-in pipe, the tip fixed connection that lets in the pipe is at flue gas heat transfer device's the back, the top fixedly connected with of filter tower leads to the exit tube, the tip fixed mounting of the exit tube is in gas boiler's front, the side fixed mounting of filter core has vibrating device, the bottom fixed mounting of filter core has the scrubbing device. Utilize the card frame to install the filter core, the filter core filters the large particulate matter in the flue gas, and the large particulate matter after the filtration falls into row sediment fill department, through control slag extractor valve, regularly clears up the particulate matter in arranging the sediment fill.

Further, the vibrating device comprises a buffer spring and a vibrator, the buffer spring is fixedly installed at the top and the bottom of the filter element, the end part of the buffer spring is fixedly installed in the clamping frame, and the vibrator is fixedly installed on the side surface of the filter element. Utilize buffer spring to cushion, utilize the vibrator to vibrate to make the difficult attached to on the filter core of particulate matter in the flue gas, improved the life of filter core.

Further, the cleaning device comprises a rotating motor, the rotating motor is fixedly installed in the middle of the bottom end of the filter element, a scraper is fixedly installed at the position of the bottom output shaft of the rotating motor, and the scraper is attached to the bottom of the filter element. Utilize the rotating electrical machines to drive the scraper blade and scrape the bottom of filter core to prevented that the flue gas particulate matter from being attached to and being difficult to fall on the filter core, influenced the filter effect.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the flue gas calandria at this scheme utilization coking furnace body top conducts the flue gas among the combustion process and discharges, carries out reuse with the waste heat of flue gas through heat transfer device to preheat the preheater, thereby make the waste heat of flue gas can be utilized once more, reduced the consumption of the burning energy.

(2) The steam turbine is driven by utilizing the potential energy of the flue gas and the combustion heating of the gas boiler, so that electric energy is generated by the generator set, certain electric power supply is provided, the production cost of an enterprise is reduced, the situation of power supply shortage of a power grid is relieved, meanwhile, the flue gas is treated by the fine filtering tower, the emission of harmful gas is reduced, and the pollution to the atmosphere is reduced.

(3) Utilize the card frame to install the filter core, the filter core filters the large particulate matter in the flue gas, and the large particulate matter after the filtration falls into row sediment fill department, through control slag extractor valve, regularly clears up the particulate matter in arranging the sediment fill.

(4) Utilize buffer spring to cushion, utilize the vibrator to vibrate to make the particulate matter in the flue gas be difficult for adhering to on the filter core, improved the life of filter core, utilize the rotating electrical machines to drive the scraper blade and scrape the bottom of filter core, thereby prevented that the flue gas particulate matter from adhering to and being difficult to fall down on the filter core, influence the filter effect, improved the life of filter core.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a right side view of a preheat furnace section of the present invention;

FIG. 3 is a sectional view of a portion of the flue gas heat exchange device of the present invention;

FIG. 4 is a schematic view of the structure of the filter unit according to the present invention;

FIG. 5 is an enlarged view of the structure A of the present invention.

The reference numbers in the figures illustrate:

1. a coking furnace body; 2. an air inlet pipe; 3. a blower; 4. a flue gas calandria; 5. preheating a furnace; 501. a connecting hopper; 502. an on-off valve; 503. a sealing door; 6. a support; 7. a connecting pipe; 8. a three-way switching valve; 9. a flue gas heat exchange device; 901. a flue gas heat exchanger; 902. the flue gas passes through the coil pipe; 903. a heat conducting plate; 10. a filtration device; 1001. a filtration tower; 1002. a clamping frame; 1003. a filter element; 1004. a slag discharge hopper; 1005. introducing a pipe; 1006. an outlet pipe; 1007. a slag discharge valve; 11. a steam turbine; 12. a generator set; 13. a discharge pipe; 14. a fine filtration tower; 15. a discharge pipe; 16. a vibrating device; 1601. a buffer spring; 1602. a vibrator; 17. a brushing device; 1701. a rotating electric machine; 1702. a squeegee; 18. a gas boiler.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1-2, a coking furnace for refining waste iron comprises a coking furnace body 1, an air inlet pipe 2 is fixedly installed on the left side of the coking furnace body 1, an air blower 3 is fixedly installed on the left side of the air inlet pipe 2, a flue gas exhaust pipe 4 is fixedly connected to the top of the coking furnace body 1, a preheating furnace 5 is fixedly installed on the right side of the coking furnace body 1, a support 6 is fixedly installed on the bottom of the coking furnace body 1, a connecting pipe 7 is fixedly connected to the right side of the flue gas exhaust pipe 4, a three-way switching valve 8 is fixedly installed on the pipe body of the connecting pipe 7, a flue gas heat exchange device 9 is fixedly connected to the end of the connecting pipe 7, the top of the flue gas heat exchange device 9 is fixedly installed on the bottom of the preheating furnace 5, a filter device 10 is fixedly connected to the back of the flue gas heat exchange device 9, and a steam, the top fixed mounting of steam turbine 11 has generating set 12, steam turbine 11's right side fixedly connected with discharge pipe 13, the tip fixed mounting of discharge pipe 13 has gas boiler 18, gas boiler 18's right side fixed mounting has fine filtering tower 14, fine filtering tower 14's top fixed mounting has delivery pipe 15. Utilize flue gas calandria 4 at 1 top of coking furnace body to conduct the flue gas among the combustion process and discharge, carry out reuse through heat transfer device with the waste heat of flue gas, thereby preheat preheater 5, filter the cigarette ash of big granule through utilizing filter equipment 10, the damage of flue gas particulate matter to steam turbine 11 has been reduced, potential energy and the 18 heating of gas boiler through utilizing the flue gas drive steam turbine 11, thereby there is generating set 12 to produce the electric energy through having, the flue gas has reduced harmful gas's emission through the processing of smart filter tower 14 simultaneously.

Referring to fig. 3, the flue gas heat exchange device 9 includes a flue gas heat exchanger 901, a flue gas passing coil 902 is fixedly installed inside the flue gas heat exchanger 901, one end of the flue gas passing coil 902 is fixedly connected to the end of the flue gas discharge pipe 4, the other end of the flue gas passing coil 902 is fixedly connected to the front of the filtering device 10, a plurality of heat conducting discs 903 are fixedly installed inside the flue gas heat exchanger 901, and the tops of the heat conducting discs 903 are fixedly installed at the bottom of the preheating furnace 5. When the flue gas passes through the coil pipe 902, the heat conduction plate 903 conducts the heat energy of the flue gas and transfers the heat energy to the inside of the preheating furnace 5, so that the heat energy utilization rate of the flue gas is improved, and the consumption of combustion resources is reduced.

Referring to fig. 1, a connecting hopper 501 is fixedly connected to the left side of the preheating furnace 5, a switch valve 502 is fixedly installed at the top of the connecting hopper 501, and a sealing door 503 is fixedly installed at the right side of the preheating furnace 5. The preheating furnace 5 and the coking furnace main body 1 are connected by a connecting hopper 501, the opening and closing of the preheating furnace 5 are controlled by an opening and closing valve 502, and the preheating furnace 5 is opened and closed by a sealing door 503.

Referring to fig. 4, the filtering device 10 includes a filtering tower 1001, a clamping frame 1002 is fixedly installed inside the filtering tower 1001, a filter element 1003 is movably installed on a frame body of the clamping frame 1002, a slag discharge hopper 1004 is fixedly installed at the bottom of the filtering tower 1001, a slag discharge valve 1007 is fixedly installed on a side surface of the slag discharge hopper 1004, an inlet pipe 1005 is fixedly installed on the left side of the filtering tower 1001, an end portion of the inlet pipe 1005 is fixedly connected to the back surface of the flue gas heat exchange device 9, an outlet pipe 1006 is fixedly connected to the top of the filtering tower 1001, an end portion of the outlet pipe 1006 is fixedly installed on the front surface of the gas boiler 18, a vibrating device 16 is fixedly installed on a side surface of the filter element 1003, and a cleaning device 17 is fixedly installed at the bottom of the filter. Utilize card frame 1002 to install filter core 1003, filter core 1003 filters the large particulate matter in the flue gas, and the large particulate matter after the filtration falls into row sediment fill 1004 department, clears up the particulate matter in arranging sediment fill 1004 regularly through control sediment valve 1007.

Referring to fig. 5, the vibration device 16 includes a buffer spring 1601 and a vibrator 1602, the buffer spring 1601 is fixedly installed at the top and the bottom of the filter element 1003, an end of the buffer spring 1601 is fixedly installed in the card holder 1002, and the vibrator 1602 is fixedly installed at a side of the filter element 1003. Utilize buffer spring 1601 to cushion, utilize vibrator 1602 to vibrate to make the difficult adhesion of particulate matter in the flue gas on filter core 1003, improved the life of filter core 1003.

Referring to fig. 4, the cleaning device 17 includes a rotating electrical machine 1701, the rotating electrical machine 1701 is fixedly installed at the middle of the bottom end of the filter core 1003, a scraper 1702 is fixedly installed at the position of the bottom output shaft of the rotating electrical machine 1701, and the scraper 1702 is attached to the bottom of the filter core 1003. Utilize rotating electrical machines 1701 to drive scraper blade 1702 and scrape the bottom of filter core 1003 to prevented that the flue gas particulate matter from attaching to and being difficult to fall on filter core 1003, influenced the filter effect.

In the invention, flue gas in the combustion process is conducted and discharged by utilizing the flue gas calandria 4 at the top of the coking furnace body 1, the waste heat of the flue gas is reused by the heat exchange device, so that the preheating furnace 5 is preheated, the waste heat of the flue gas can be reused, the consumption of combustion energy is reduced, the steam turbine 11 is driven by utilizing the potential energy of the flue gas and the combustion heating of the gas boiler 18, so that electric energy is generated by the generator set 12, certain electric power supply is provided, the production cost of enterprises is reduced, the situation of power supply shortage of a power grid is relieved, meanwhile, the discharge of harmful gas is reduced by treating the flue gas by the fine filtering tower 14, the pollution to the atmosphere is reduced, the steam turbine 11 is driven by utilizing the potential energy of the flue gas and the combustion heating of the gas boiler 18, so that electric energy is generated by the generator set 12, and certain electric power, the manufacturing cost of enterprise has been reduced, alleviate the nervous situation of electric wire netting power supply, the flue gas has reduced harmful gas's emission through the processing of smart filter tower 14 simultaneously, the pollution to atmosphere has been reduced, utilize card frame 1002 to install filter core 1003, filter core 1003 filters the large granule material in the flue gas, the large granule material after filtering falls into row's sediment fill 1004 department, through control slag discharge valve 1007, regularly clear up the particulate matter in arranging sediment fill 1004, utilize buffer spring 1601 to cushion, utilize vibrator 1602 to vibrate, thereby make the particulate matter in the flue gas be difficult for adhering to on filter core 1003, the life of filter core 1003 has been improved, utilize rotating electrical machines 1701 to drive scraper blade 1702 and scrape the bottom of filter core 1003, thereby it is difficult for falling on filter core 1003 to have prevented that the flue gas particulate matter from adhering to, influence the filter effect, the life of filter core 1003 has been improved.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. A coke oven for refining waste iron, comprising a coke oven body (1), characterized in that: the utility model discloses a coke oven, including coking furnace body (1), air-supply line (2) and air-supply line (2), the left side fixed mounting of air-supply line (2) has air-blower (3), the top fixedly connected with flue gas calandria (4) of coking furnace body (1), the right side fixed mounting of coking furnace body (1) has preheater (5), the bottom fixed mounting of coking furnace body (1) has support (6), the right side fixedly connected with connecting pipe (7) of flue gas calandria (4), fixed mounting has tee bend switching valve (8) on the body of connecting pipe (7), the tip fixedly connected with flue gas heat transfer device (9) of connecting pipe (7), the top fixed mounting of flue gas heat transfer device (9) is in the bottom of preheater (5), the back fixedly connected with filter equipment (10) of flue gas heat transfer device (9), the right side fixed mounting of filter equipment (10) has steam turbine (11), the top fixed mounting of steam turbine (11) has generating set (12), the right side fixedly connected with discharge pipe (13) of steam turbine (11), the tip fixed mounting of discharge pipe (13) has gas boiler (18), the right side fixed mounting of gas boiler (18) has smart filter tower (14), the top fixed mounting of smart filter tower (14) has delivery pipe (15).

2. The coke oven for refining iron scrap according to claim 1, wherein: the flue gas heat exchange device (9) comprises a flue gas heat exchanger (901), flue gas passing coils (902) are fixedly mounted inside the flue gas heat exchanger (901), one end of the flue gas passing coils (902) is fixedly connected to the end of a flue gas exhaust pipe (4), the other end of the flue gas passing coils (902) is fixedly connected to the front of the filtering device (10), a plurality of heat conducting discs (903) are fixedly mounted inside the flue gas heat exchanger (901), and the tops of the heat conducting discs (903) are fixedly mounted at the bottom of the preheating furnace (5).

3. The coke oven for refining iron scrap according to claim 1, wherein: the left side fixedly connected with connecting hopper (501) of preheater (5), the top fixed mounting of connecting hopper (501) has ooff valve (502), the right side fixed mounting of preheater (5) has sealing door (503).

4. The coke oven for refining iron scrap according to claim 1, wherein: the filtering device (10) comprises a filtering tower (1001), a clamping frame (1002) is fixedly arranged in the filtering tower (1001), a filter element (1003) is movably arranged on the frame body of the clamping frame (1002), a slag discharge hopper (1004) is fixedly arranged at the bottom of the filter tower (1001), a slag discharge valve (1007) is fixedly arranged on the side surface of the slag discharge hopper (1004), an inlet pipe (1005) is fixedly arranged on the left side of the filter tower (1001), the end part of the inlet pipe (1005) is fixedly connected with the back surface of the flue gas heat exchange device (9), the top of the filtering tower (1001) is fixedly connected with a through-out pipe (1006), the end part of the through-out pipe (1006) is fixedly arranged on the front surface of the gas boiler (18), the side face of the filter element (1003) is fixedly provided with a vibrating device (16), and the bottom of the filter element (1003) is fixedly provided with a cleaning device (17).

5. The coke oven for refining iron scrap according to claim 4, wherein: the vibration device (16) comprises a buffer spring (1601) and a vibrator (1602), wherein the buffer spring (1601) is fixedly installed at the top and the bottom of the filter element (1003), the end part of the buffer spring (1601) is fixedly installed in the clamping frame (1002), and the vibrator (1602) is fixedly installed on the side surface of the filter element (1003).

6. The coke oven for refining iron scrap according to claim 4, wherein: the cleaning device (17) comprises a rotating motor (1701), wherein the rotating motor (1701) is fixedly installed in the middle of the bottom end of the filter element (1003), a scraper (1702) is fixedly installed at the position of the bottom output shaft of the rotating motor (1701), and the scraper (1702) is attached to the bottom of the filter element (1003).