CN109021991A - Totally-enclosed centralized collection and treatment method for coke oven smoke - Google Patents

Abstract

The invention relates to a coke oven smoke totally-enclosed centralized collecting and processing method, which adopts a totally-enclosed smoke collecting cover to completely enclose a coke oven and accessory facilities thereof, wherein the top of the smoke collecting cover is provided with a smoke collecting pipe network which comprises a furnace top coal-charging smoke collecting pipe, a machine side coke pushing smoke collecting pipe, a coke side coke discharging smoke collecting pipe and a smoke collecting main pipe; the furnace top coal charging smoke collecting pipe is used for collecting smoke discharged during coal charging operation of the carbonization chamber and dissipated smoke in a furnace top area; the coke side coke discharging smoke collecting pipe is used for collecting smoke discharged during coke discharging operation of the coking chamber and coke side escaping smoke; and the smoke dust is sent to a dust removal system for centralized treatment. The invention realizes the centralized collection and treatment of the smoke and dust dissipated by the coke oven and the smoke and dust discharged during operation, and simultaneously, the invention is matched with perfect safety facilities to ensure the safe operation of the totally-enclosed coke oven.

Description

A fully enclosed centralized collection and treatment method for coke oven smoke and dust

technical field

The invention relates to the technical field of coke oven dust removal, in particular to a fully enclosed centralized collection and treatment method for coke oven smoke and dust.

Background technique

The coking industry is an important industry related to the lifeline of the national economy. It has developed rapidly in recent years, but the serious environmental pollution problems caused by coking production have become increasingly prominent. During the coke oven production process, a large amount of intermittent smoke and dust will be emitted into the atmosphere during the production links such as coal charging, coke pushing, and coke discharge; the furnace door, furnace roof coal charging hole, and fire viewing hole will also escape and discharge in an organized manner. soot. The smoke contains gas containing tar and a large amount of dust, which will cause great harm to the surrounding environment.

At present, in coking production, the smoke and dust emitted during coal loading, coke pushing, and coke discharge operations can be collected by coke oven machinery, burner smoke collection devices, etc. in conjunction with the corresponding dust collection dry pipes, and then sent to the corresponding dust removal ground station for processing , but there is no good control method for fugitive smoke and dust. With the continuous improvement of the country's environmental protection requirements, it is difficult for the existing dust removal technology of coke ovens to meet the requirements. Only by continuously developing advanced, energy-saving and high-efficiency environmental protection new processes can we actively promote the sustainable, stable and healthy development of the coking industry.

Contents of the invention

The invention provides a fully enclosed centralized collection and treatment method for coke oven smoke and dust, which realizes the centralized collection of coke oven fugitive smoke and intermittent smoke during operation, realizes the integrated treatment of all coke oven smoke and dust, and is equipped with Perfect safety facilities ensure the safe operation of fully enclosed coke ovens; it provides a practical and effective solution to the coke oven smoke pollution problem that has plagued enterprises for a long time.

In order to achieve the above object, the present invention adopts the following technical solutions to realize:

A fully enclosed centralized collection and treatment method for coke oven smoke and dust, adopting a fully enclosed smoke and dust collection cover to enclose the coke oven and its auxiliary facilities, and setting a smoke and dust collection pipe network on the top of the smoke and dust collection cover, the smoke and dust collection pipe network includes furnace The top-loading coal dust collection pipe, the machine side coke push dust collection pipe, the coke side discharge smoke dust collection pipe and the dust collection main pipe; the top area, the machine side and the coke side of each hole of the coke oven are respectively provided with one-to-one correspondence Furnace top coal charging dust collection pipe, machine side push coke dust collection pipe, coke side coke discharge dust collection pipe; the bottom opening of the furnace top coal charging dust collection pipe is located in the top area of the coke oven, which is used to collect coal during the coal charging operation of the carbonization chamber The exhausted smoke and dust and the fugitive smoke and dust in the top area of the furnace; the bottom opening of the coke pushing smoke collection pipe on the machine side is located on the side of the coke oven machine, which is used to collect the smoke and dust emitted during the coke pushing operation in the carbonization chamber and the fugitive smoke on the machine side. The bottom opening of the coke discharge smoke collection pipe is located on the coke side of the coke oven, which is used to collect the smoke and dust emitted during the coke discharge operation of the carbonization chamber and the fugitive smoke from the coke side; The smoke and dust collection pipe on the coke side collects fugitive smoke and dust from the coke oven and the smoke and dust emitted during coal charging, coke pushing and coke discharge into the main pipe of smoke and dust collection, and then sends it to the dust removal system for centralized treatment through the smoke and dust conveying pipeline.

The dust collection pipe for charging coal on the top of the furnace, the dust collection pipe for pushing coke on the machine side, and the dust collection pipe for coke discharge on the coke side are respectively provided with flap valves; Adjust the opening of the flap valve in each dust collection pipe corresponding to the carbonization chamber to more than 80%, and adjust the opening of the flap valve in the dust collection pipe corresponding to other carbonization chambers within 20% as required.

A plurality of anti-blowing outlets are arranged around the dust collecting hood, which are respectively connected with corresponding blowing blowers, and fresh air is blown into the dust collecting hood regularly.

The top of the dust collection hood is provided with a plurality of top exhaust outlets along the length and width of the coke oven, and self-supporting wind caps are respectively arranged at the top exhaust outlets; A number of self-supporting hoods are used to force the air to be exhausted, and at the same time, fresh air is blown into the dust collection hood through a number of reverse air outlets.

The middle part of the dust collection hood is provided with a trough-shaped structure protruding upwards and retracted. The trough-shaped structure is arranged along the length of the coke oven, and the smoke-dust collection pipe network is arranged below the trough-shaped structure.

The dust removal system is a dust removal ground station, and the dust removal ground station is provided with a suction fan.

The dust collection cover is provided with a plurality of ignition devices; the ignition device is composed of a ignition pipe and an ignition pipe cover/a ignition pipe valve, and the ignition pipes are arranged one by one on the top of the coke oven rising pipe, and the ignition The bottom opening of the fire pipe is set opposite to the top opening of the coke oven ascending pipe, and the top of the fire pipe extends outside the smoke collection cover; the top opening of the fire pipe is provided with a fire pipe cover, or the fire pipe is provided with a fire pipe Valve, squib cover / squib valve and the water seal cover of the coke oven riser are linked to realize synchronous opening and closing; in the coke oven accident state, the flame and high-temperature flue gas generated by the burning of raw gas in the coke oven riser directly enter the guide The fire pipe is led out of the coke oven dust removal hood by the fire guide pipe, which protects the smoke dust collection hood.

The water seal cover of the coke oven riser, the fire pipe cover/fire pipe valve are also provided with a manual opening and closing device; when the power failure is caused by an accident state, the water seal cover of the coke oven riser, The squib cover / squib valve, and the reverse blower is driven by a spare diesel generator, blowing fresh air into the dust collection hood through the reverse blow port.

The dust collection hood is composed of a steel frame and an enclosure system. The steel frame is set on the periphery of the coke oven, and a self-supporting hood is installed on the top of the steel frame; the enclosure system includes a roof panel and a wall panel.

Fire-fighting devices, combustible and toxic gas detection and alarm devices are installed in the dust collection cover.

Compared with prior art, the beneficial effect of the present invention is:

1) A fully enclosed dust collection hood is set up in the coke oven area to centrally collect fugitive fumes generated during coke oven production and burst fumes emitted during operation, realizing the organized emission of all coke oven fume and dust, greatly improving Improve the overall dust removal effect of the coke oven;

2) Collect fugitive smoke and dust and the smoke and dust generated by coal charging, coke pushing and coke discharge, and send them to the dust removal system for centralized treatment, which is conducive to energy saving and consumption reduction, and reduces equipment investment and equipment footprint;

3) After the coke oven is fully closed, the most important thing is to control the concentration of combustible and toxic gases in the dust collection hood, to prevent damage to operators and production facilities, and to eliminate potential safety hazards; Fresh air is blown into the hood to ensure the safe operation of the system after the coke oven is fully closed;

4) After the coke oven is completely closed, the rising pipe of the coke oven is also in the dust collection cover. During the production of the coke oven, when the water cover of the rising pipe is opened, the flame and high-temperature smoke generated by the combustion of raw coal gas have the characteristics of high temperature and long flame. And every coking cycle will occur; in the event of an accident, the water seal cover of the riser may be forced to open. At this time, a large amount of high-temperature smoke and waste gas will escape from the riser of the coke oven and directly burn the inside of the smoke collection hood. cause it to be heated and deformed or even burnt; the present invention solves the above problems by setting a fire guide above the coke oven riser, effectively protecting the dust collection cover;

5) In an accident state, especially in a power failure state, not only the dust removal system cannot operate normally, but all electric equipment is in a state of outage; and the coke oven escaping smoke and dust will not stop; in the present invention, the water seal cover, guide Firepipe cover/pipe pipe valves are equipped with manual opening and closing devices at the same time, and the blower is equipped with diesel generators at the same time. The environment is in a safe state;

6) There are also fire-fighting devices, combustible and toxic gas detection and alarm devices in the smoke and dust collection hood, and the safety facilities are complete, which can further improve safety.

Description of drawings

Fig. 1 is a schematic diagram of the principle of a fully enclosed centralized collection and treatment method for coke oven smoke and dust according to the present invention.

Fig. 2 is a schematic structural diagram of the dust collection pipe network of the present invention.

In the figure: 1. Smoke and dust collection cover 2. Coke oven 3. Machine side coke pushing machine 4. Coke side coke blocking machine 5. Furnace top coal loading car 6. Smoke and dust collection pipe network 61. Furnace top coal and dust collection pipe 62. Coke dust collection pipe on the machine side 63. Coke discharge dust collection pipe on the coke side 64. Dust collection supervisor 7. Dust conveying pipe 8. Dust removal ground station 9. Suction fan 10. Self-operated hood 11. Coke oven rising pipe 12. Guide Fire device 13. Anti-air outlet 14. Anti-air blower 15. Fire-fighting device 16. Flap valve

Detailed ways

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Fig. 1 and Fig. 2, a fully enclosed collection and treatment method of coke oven dust according to the present invention adopts a fully enclosed dust collection cover 1 to completely seal the coke oven 2 and its ancillary facilities. The top of the collection cover 1 is provided with a dust collection pipe network 6, which includes a dust collection pipe 61 for coal loading on the top of the furnace, a dust collection pipe 62 for pushing coke at the machine side, a dust collection pipe 63 for coke discharge at the coke side, and a dust collection supervisor 64; The furnace top area, the machine side and the coke side of each hole of the furnace 2 are respectively provided with a furnace top coal charging soot collection pipe 61, a machine side coke pushing soot collection pipe 62, and a coke side coke discharge soot collecting pipe 63; The bottom opening of the furnace top coal charging dust collection pipe 61 is located in the top area of the coke oven, which is used to collect the smoke and dust emitted during the coal charging operation in the carbonization chamber and the fugitive smoke from the furnace top area; the bottom opening of the coke pushing dust collection pipe 62 Located on the side of the coke oven machine, it is used to collect the smoke and dust emitted during the coke pushing operation in the coking chamber and the fugitive smoke and dust on the machine side. The smoke and dust discharged during operation and the fugitive soot on the coke side; the coal charging soot collection pipe 61 on the furnace top, the coke pushing soot collecting pipe 62 on the machine side and the coke side discharging soot collecting pipe 63 combine the coke oven fugitive soot with coal charging, pushing The smoke and dust discharged during coking and coking are all collected in the smoke and dust collection main pipe 64, and then sent to the dust removal system through the smoke and dust conveying pipeline 7 for centralized treatment.

The dust collection pipe 61 for charging coal on the top of the furnace, the dust collection pipe 62 for pushing coke on the machine side, and the dust collection pipe 63 for coke discharge on the coke side are respectively provided with flap valves 16; The opening of the flap valve 16 in each dust collection pipe 61, 62, 63 corresponding to the carbonization chamber of the industry is adjusted to more than 80%, and the opening of the flap valve 16 in the dust collection pipe 61, 62, 63 corresponding to other carbonization chambers Adjust within 20% as needed.

The surroundings of the dust collection cover 1 are provided with a plurality of blow-back ports 13, which are respectively connected with corresponding blowers 14, and fresh air is blown into the dust collection cover 1 on a regular basis.

The top of the dust collection cover 1 is provided with a plurality of top air outlets along the length and width of the coke oven 2, and self-supporting air caps 10 are respectively arranged at the top air outlets; A plurality of self-supporting hoods 10 on the collection hood 1 forcefully exhaust air, and at the same time blow fresh air into the dust collection hood 1 through a plurality of reverse air outlets 13 .

The middle part of the dust collection cover 1 is provided with a trough-shaped structure protruding upwards and retracted. The trough-shaped structure is arranged along the entire length of the coke oven 2, and the dust-collecting pipe network 6 is arranged below the trough-shaped structure.

The dust removal system is a dust removal ground station 8, and the dust removal ground station 8 is provided with a suction fan 9.

The dust collection cover 1 is provided with a plurality of ignition devices 12; the ignition device 12 is composed of a ignition pipe and an ignition pipe cover/a ignition pipe valve, and the ignition pipes are arranged on the coke oven riser 11 correspondingly. Above, the bottom opening of the fire pipe is set opposite to the top opening of the coke oven riser 11, and the top of the fire pipe extends to the outside of the dust collection cover 1; the top opening of the fire pipe is provided with a fire pipe cover, or The fire pipe is equipped with a squib valve, and the squib cover/pipe valve is linked with the water seal cover of the coke oven riser 11 to realize synchronous opening and closing. Flame and high-temperature flue gas directly enter the fire guide tube and lead out of the coke oven dust removal cover 1 through the fire guide tube to protect the smoke dust collection cover 1 .

The water seal cover of the coke oven riser 11, the fire pipe cover/fire pipe valve are also provided with a manual opening and closing device; when an accident state causes a power outage, the water seal of the coke oven riser 11 is opened and closed by the manual opening and closing device. cover, squib cover/quick valve, and the anti-blowing blower 14 is driven by a spare diesel generator at the same time, and blows fresh air into the dust collection cover 1 through the anti-blowing port 13.

The dust collection hood 1 is composed of a steel frame and an enclosure system. The steel frame is located on the periphery of the coke oven, and a self-supporting hood 10 is installed on the top of the steel frame; the enclosure system includes a roof panel and a wall panel.

Fire-fighting devices, combustible and toxic gas detection and alarm devices are arranged inside the dust collection cover 1 .

The general concept of the present invention is (taking the top-loaded coke oven as an example): a fully enclosed dust collection cover 1 is set, and the coke oven 2 and its auxiliary facilities such as coke oven machinery (including the top coal charging car 5, machine The side pushing coke machine 3 and the coke side coke arresting machine 4) are all placed inside the dust collection cover 1, so that the smoke dust produced during the production process of the coke oven 2 can be collected comprehensively. A dust collection pipe network 6 is set at the high point of the top of the dust collection cover 1, and is connected to the dust removal system (dust removal ground station 8) through the dust conveying pipe 7, and the collected coke oven dust is sent to the dust removal by means of the suction force of the suction fan 9 system; the dust collection pipe network 6 includes a dust collection pipe 61 for coal loading on the furnace top, a dust collection pipe 62 for pushing coke at the machine side, and a dust collection pipe 63 for coke discharge at the coke side. The above three collection pipes 61, 62, and 63 are used to collect corresponding The fugitive smoke and dust in the area, that is, all the smoke and dust generated by the coke oven 2 are finally sent to the dust removal system through the smoke and dust conveying pipeline 7, and the net smoke after centralized purification treatment is discharged up to the standard.

The smoke and dust collection cover 1 is a fully enclosed structure, which adopts a steel structure skeleton and an external enclosure system. The roof panels and wall panels can be made of color steel plates or daylighting panels. Outsourcing refractory ceramic fiber or other high temperature resistant insulation materials.

When the coke oven 2 is in normal production, the smoke and dust collection pipe network 6 is linked with the coke oven control system to realize the automatic adjustment of the flue gas collection, and the smoke and dust collection pipes 61, 62, 63 in the coal charging, coke pushing and coke discharging operation areas are in operation. The opening of the flap valve 16 in the dust collecting pipes 61, 62, 63 in other areas is larger. For example, when the coke pushing operation is performed in the nth hole carbonization chamber, the machine side coke pushing dust collection pipe 62 corresponding to the nth hole carbonization chamber, the coke side discharge dust collection pipe 63 of the nth hole carbonization chamber, and the n-2 hole carbonization The opening of the flap valve 16 in the furnace top coal charging dust collection pipe 61 is adjusted to 80% to 100%, and the machine-side coke pushing dust collection pipe 62 corresponding to the other holes in the carbonization chamber, and the coke-side coke discharge dust collection pipe 63. The opening degree of the flap valve 16 in the dust collection pipe 61 for charging coal on the furnace top can be adjusted to 20% as required. At the same time, the suction fan 9 adopts a frequency conversion control form, and its speed can be adjusted in real time according to the amount of smoke and dust generated, so as to achieve the purpose of saving energy and reducing consumption.

Around the dust collection hood 1 are provided with a plurality of anti-air outlets 13, and the anti-air blower 14 is regularly activated from the anti-air outlets 13 to blow fresh air into the dust collection hood 1, so that the coke oven area maintains a good ventilation condition and improves the coke oven area. Operating environment in the furnace area. In an accident state, the waste gas released from the coke oven area will gather in the coke oven area and cannot be discharged outside, causing a major safety hazard. The air reduces the concentration of combustible components to below the explosive limit; in the event of a power outage, the reverse blower 14 can continue to work driven by the diesel generator. In addition, a plurality of self-supporting hoods 10 are arranged on the top of the dust collection hood 1, which can be opened synchronously with the reverse blower 14 in an accident state, and the auxiliary reverse blower 14 will release the raw coal gas in the smoke collection hood 1 to the outside.

In an accident state, the original raw gas automatic release ignition device of coke oven 2 should be automatically turned on to release the raw gas, but sometimes the ignition device cannot respond in time in actual production, and when the pressure of the raw gas is too high, the coke oven riser 11 will be turned on. When the water seal cover is opened, the flame and high temperature of the raw gas combustion will directly burn the smoke and dust collection cover 1, causing destructive damage to it; for this reason, the present invention adds a fire guide 12 above the coke oven riser 11, The ignition device 12 is set in one-to-one correspondence with the coke oven riser 11, the inlet of the ignition device 12 is located directly above the coke oven riser 11, and the outlet is higher than the top surface of the smoke collection cover 1; when the waste gas is automatically released and the ignition device When malfunctioning, the ignition device 12 can be opened synchronously with the water seal cover of the coke oven riser 11 to lead out the raw coal gas and discharge it into the atmosphere, so as to protect the dust collection cover 1 .

A fire-fighting device is provided in the dust collection cover 1 to quickly extinguish the open flames in the coke oven area under the accident state; in addition, a combustible and toxic gas detection and alarm device is also provided in the smoke collection cover 1, when the combustible and toxic gas in the smoke collection cover 1 When the toxic gas reaches the upper limit of the concentration, the alarm will send out a warning to remind the relevant operators to deal with it or evacuate in time, so as to ensure the personal safety of the operators.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (10)

1. A coke oven smoke fully enclosed centralized collection and processing method is characterized in that a fully enclosed smoke collection hood is used to completely seal the coke oven and its ancillary facilities, and a smoke collection pipe network is arranged on the top of the smoke collection cover. The smoke and dust collection pipe network includes the coal charging smoke and dust collection pipe on the top of the furnace, the machine side coke pushing smoke dust collection pipe, the coke side discharge smoke dust collection pipe and the smoke dust collection supervisor; Correspondingly, there are dust collection pipes for coal charging on the top of the furnace, dust collection pipes for pushing coke on the machine side, and dust collection pipes for coke discharge on the coke side; the bottom opening of the dust collection pipes for coal charging on the furnace top is located above the top of the coke oven for collecting The smoke and dust emitted during the coal charging operation in the carbonization chamber and the fugitive smoke and dust in the furnace top area; the bottom opening of the coke pushing dust collection pipe on the machine side is located above the coke oven machine side, and is used to collect the smoke and dust emitted during the coke pushing operation in the carbonization chamber and the machine side. The fugitive soot from the coke side, the bottom opening of the coke side discharge soot collection pipe is located above the coke side of the coke oven, and is used to collect the fugitive soot emitted during the coke discharge operation of the carbonization chamber and the fugitive soot from the coke side; the furnace top coal loading soot collection pipe, The coke pusher dust collection pipe on the machine side and the coke side discharge dust collection pipe collect all the fugitive dust from the coke oven and the dust emitted during coal charging, coke pushing and coke discharge into the dust collection main pipe, and then send it to the Centralized treatment in the dust removal system. 2. A fully enclosed centralized collection and treatment method for coke oven smoke and dust according to claim 1, characterized in that the dust collection pipe for charging coal on the top of the furnace, the dust collection pipe for pushing coke on the side of the machine, and the dust collection pipe for coke discharge on the coke side The flap valves are respectively set in the pipes; when the coke oven is in normal production, the opening of the flap valves in the dust collection pipes corresponding to the carbonization chambers undergoing coal charging, coke pushing or coke discharge operations are adjusted to more than 80%, and the openings of other carbonization chambers are adjusted to over 80%. The opening degree of the flap valve in the corresponding smoke collection pipe is adjusted within 20% as required. 3. A method for fully enclosed centralized collection and treatment of coke oven smoke and dust according to claim 1, characterized in that a plurality of blow-back outlets are arranged around the smoke-dust collection hood, which are respectively connected with corresponding blow-back blowers, and periodically Blow fresh air into the fume collection hood. 4. A coke oven fume fully enclosed centralized collection and treatment method according to claim 1 or 3, characterized in that the top of the fume collection hood is provided with a plurality of top rows along the length and width of the coke oven. The tuyere and the top air outlet are respectively equipped with self-supporting air caps; when the coke oven is in an accident state, the air is forced to be exhausted through multiple self-supporting air caps arranged on the dust collection hood, and at the same time, it is blown into the dust collection hood through multiple reverse air outlets. Blast in fresh air. 5. A fully enclosed centralized collection and treatment method for coke oven smoke and dust according to claim 1 or 3, characterized in that, the middle part of the smoke dust collection cover is provided with a groove-shaped structure protruding upwards and retracted, and the groove-shaped The structure is arranged along the entire length of the coke oven, and the smoke collection pipe network is arranged under the trough structure. 6. A fully enclosed centralized collection and treatment method for coke oven smoke and dust according to claim 1, characterized in that the dust removal system is a dust removal ground station, and the dust removal ground station is equipped with a suction fan. 7. A kind of coke oven smoke fully enclosed centralized collection and processing method according to claim 1 or 3, characterized in that, said smoke collection cover is provided with a plurality of ignition devices; the ignition devices consist of ignition pipes and Composed of squib cover / squib valve, the squib is arranged one by one on the top of the coke oven rising tube, the bottom opening of the squib is opposite to the top opening of the coke oven rising tube, the top of the squib is Extending to the outside of the smoke collection cover; the top opening of the squib is provided with a squib cover, or the squib valve is installed inside the squib, and the squib cover/quick valve is linked with the water seal cover of the coke oven riser pipe. Synchronous opening and closing; in the state of coke oven accident, the flame and high-temperature flue gas produced by the combustion of raw gas in the coke oven ascending pipe directly enter the fire guide tube and lead out of the coke oven dust removal hood through the fire guide tube, which plays a protective role in the smoke collection cover. 8. A method for fully enclosed centralized collection and treatment of coke oven smoke and dust according to claim 7, characterized in that, the water seal cover of the coke oven riser, the fire pipe cover/fire pipe valve are also provided with a manual Opening and closing device: when a power outage is caused by an accident, the water seal cover of the coke oven ascending pipe, the squib cover / squib valve are opened and closed through the manual opening and closing device, and the reverse blower is driven by the spare diesel generator. Blow fresh air into the dust collection hood from the mouth. 9. A coke oven fume fully enclosed centralized collection and treatment method according to claim 1 or 3, characterized in that the fume collection hood is composed of a steel structure framework and an enclosure system, and the steel structure framework is arranged in the coke oven On the periphery, a self-supporting hood is installed on the top of the steel structure skeleton; the enclosure system includes roof panels and wall panels. 10. A fully enclosed centralized collection and treatment method for coke oven smoke and dust according to claim 1 or 3, characterized in that a fire-fighting device and a combustible and toxic gas detection and alarm device are installed inside the smoke and dust collection hood.