CN114702971A - Waste gas distribution device of coke oven and working method thereof - Google Patents
Waste gas distribution device of coke oven and working method thereof Download PDFInfo
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- CN114702971A CN114702971A CN202210456005.XA CN202210456005A CN114702971A CN 114702971 A CN114702971 A CN 114702971A CN 202210456005 A CN202210456005 A CN 202210456005A CN 114702971 A CN114702971 A CN 114702971A
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- coke oven
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- adjusting
- distribution device
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- 239000002912 waste gas Substances 0.000 title claims abstract description 202
- 239000000571 coke Substances 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 238000005192 partition Methods 0.000 claims abstract description 16
- 238000002485 combustion reaction Methods 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 17
- 238000005338 heat storage Methods 0.000 claims description 11
- 206010022000 influenza Diseases 0.000 claims description 9
- 230000001174 ascending effect Effects 0.000 claims description 8
- 230000001172 regenerating effect Effects 0.000 claims description 5
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 230000005465 channeling Effects 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B29/00—Other details of coke ovens
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention relates to a waste gas distribution device of a coke oven and a working method thereof, wherein the waste gas distribution device comprises a device body and a waste gas distribution mechanism; one end of the device body is connected with the small flue of the coke oven 1, and the other end of the device body is connected with the corresponding waste gas shutter; the bottom of the device body is provided with a return waste gas inlet which is connected with a waste gas return pipeline; the corresponding end of the device body is divided into 2 gas mixing channels by the partition plate; the waste gas distribution mechanism comprises a grating arranged on the partition plate and a grating adjusting device arranged outside the device body. According to the invention, the waste gas distribution mechanism is arranged, so that the flow of waste gas entering the small flue of the coke oven is effectively controlled, the mixing effect of air and waste gas is greatly enhanced, and the long-direction heating uniformity of the coke oven is ensured; meanwhile, the number of the holes in the waste gas distribution device is greatly reduced, the number of the corresponding waste gas return branch pipes and the number of the valves are reduced, the gas channeling occurrence rate is reduced, and the space occupancy rate is reduced.
Description
Technical Field
The invention relates to the technical field of coking by a coke oven, in particular to a waste gas distribution device of the coke oven and a working method thereof.
Background
The waste gas exchange shutter is special exchange equipment for connecting a coke oven heat storage chamber and a coke oven flue and is used for controlling air and heating coal gas to enter the coke oven; when the heat accumulation chamber is in a descending airflow state, the corresponding waste gas shutter is used for discharging the burnt waste gas out of the coke oven.
At present, coke ovens are classified into single-heat ovens and double-heat ovens according to different heating conditions. When the single-heat coke oven is heated by adopting coke oven gas, a waste gas return device is additionally arranged, comprises a fan, a pipeline and a check valve and is connected with a socket device of a waste gas shutter. When the air flow in the coke oven heat storage chamber is ascending air flow, the top air door of the waste gas shutter is opened, meanwhile, the fan sucks out the combustion waste gas from the coke oven flue, and the combustion waste gas passes through the waste gas pipeline and the check valve and then is introduced into the coke oven small flue through the opening at the bottom of the bell and spigot device of the waste gas shutter to be mixed with the air. The mixed gas enters each cellular regenerative chamber through the grate bricks. The waste gas return device is used for mixing combustion waste gas with air and diluting oxygen content, so that oxygen-deficient combustion is realized, and the condition of high-direction heating in the vertical flue is improved.
The conventional waste gas shutter is connected with the small flue of the coke oven by adopting a double-fork structure, and 2 branch pipelines in the double-fork structure are matched and connected with the single small flue of the coke oven. When the waste gas return distribution mode is adopted, the bottoms of the double-fork structures and the small flues of the coke oven are correspondingly provided with holes one by one, namely waste gas inlets; the combustion waste gas enters the waste gas shutter through the waste gas inlet, but because the waste gas inlet is arranged close to the small flue of the coke oven, the distance between the waste gas inlet and the small flue of the coke oven is very small, and the air and the waste gas enter the small flue of the coke oven without being fully mixed, so that the mixing effect is not ideal, the distribution of the oxygen content of the air in the vertical flue of the coke oven is not uniform, and the heating uniformity in the length direction of the coke oven is poor. In addition, the bottom of bifurcate structure trompil volume is more, leads to corresponding waste gas pipeline branch pipe quantity, check valve quantity to increase, and not only construction cost increases, makes the gas blowby point increase to area occupied is many, inconvenient maintenance and operation.
Disclosure of Invention
The invention provides a waste gas distribution device of a coke oven and a working method thereof, wherein the waste gas distribution device is arranged to effectively control the flow of waste gas entering a small flue of the coke oven, so that the mixing effect of air and waste gas is greatly enhanced, and the heating uniformity of the coke oven in the longitudinal direction is ensured; meanwhile, the number of the holes in the waste gas distribution device is greatly reduced, the number of the corresponding waste gas return branch pipes and the number of the valves are reduced, the gas channeling occurrence rate is reduced, and the space occupancy rate is reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
the waste gas distribution device of the coke oven comprises a device body and a waste gas distribution mechanism; one end of the device body is connected with 1 pair of coke oven small flues below the corresponding regenerative chambers, and the other end of the device body is connected with the corresponding waste gas shutter; a returned waste gas inlet is formed in the bottom of the device body close to one end of the small flue of the coke oven, the returned waste gas inlet is connected with a waste gas returning pipeline in a waste gas returning system of the coke oven through a waste gas returning branch pipe, and a valve is arranged on the waste gas returning branch pipe; the device body at the two sides of the returned waste gas inlet is internally provided with a clapboard respectively to divide the corresponding end of the device body into 2 gas mixing channels; the waste gas distribution mechanism comprises a grating arranged on the partition plate and a grating adjusting device arranged outside the device body.
The device body consists of a shell, a partition plate and a sealing plate; the shell consists of a rectangular box body and a quadrangular frustum pyramid-shaped box body which are connected; the outer end of the rectangular box body is connected with the corresponding waste gas shutter, and the outer end of the quadrangular frustum pyramid shaped box body is connected with the corresponding small flue of the coke oven; the outer end of the quadrangular frustum pyramid shaped box body is provided with a sealing plate, and the sealing plate is provided with bell and spigot ports at the positions corresponding to the 2 small flues of the coke oven; the two sides of the back-matching waste gas inlet in the quadrangular frustum pyramid shaped box body are symmetrically arranged by the 2 partition plates, and the quadrangular frustum pyramid shaped box body, the 2 partition plates and the sealing plate jointly form a closed structure with a triangular cross section.
The outer end of the rectangular box body is connected with the corresponding waste gas shutter through a flange; the outer end of the quadrangular frustum pyramid shaped box body is connected with the corresponding small flue of the coke oven in a socket joint mode, and a sealing structure is arranged at the socket joint.
And the returned waste gas inlet is connected with the waste gas returned branch pipe through a flange.
The device body is made of cast iron.
The grating comprises vertical gratings arranged on the left side and the right side and horizontal gratings arranged on the upper side and the lower side; a plurality of strip-shaped fixed ventilation openings are formed in the vertical grating along the vertical direction; the horizontal grate is composed of a plurality of rotatable blades arranged in parallel.
The grid adjusting device consists of an adjusting rod, an adjusting handle, an adjusting bracket, a locking mechanism and an angle ruler; the rotatable blades are strung together by the adjusting rod, and the upper end of the adjusting rod penetrates out of the top of the shell; the adjusting bracket is arranged at the top of the shell, the middle part of the adjusting handle is hinged with the adjusting bracket through a rotating shaft, and one end of the adjusting handle is hinged with the upper end of the adjusting rod; the adjusting bracket is provided with a rotating shaft locking mechanism and an angle ruler.
A working method of a waste gas distribution device of a coke oven is used for realizing the waste gas return distribution of the coke oven; the method comprises the following steps:
1) when the airflow in the vertical flue of the coke oven combustion chamber is reversed to be ascending airflow, the air damper corresponding to the waste gas shutter is opened, and simultaneously, the waste gas in the waste gas return pipeline enters the corresponding waste gas distribution device through the waste gas return branch pipe; the angle of a horizontal grid in the waste gas distribution mechanism is adjusted in advance, waste gas is guided by the grid, enters a gas mixing channel to be mixed with air flowing in through a waste gas shutter in a staggered manner, and finally enters a corresponding small flue of the coke oven;
2) when the airflow in the vertical flue of the coke oven combustion chamber is changed into descending airflow, the valve on the corresponding waste gas return branch pipe is closed, and the waste gas in the small flue of the coke oven directly flows into the corresponding waste gas shutter through the waste gas distribution device.
A working method of a waste gas distribution device of a coke oven is used for realizing the external adjustment of the coke oven; the method comprises the following steps:
1) when the airflow in the vertical flue of a certain coke oven combustion chamber is reversed to be ascending airflow, the air damper corresponding to the waste gas shutter is opened, and simultaneously, waste gas in the waste gas return pipeline enters the corresponding waste gas distribution device through the waste gas return branch pipe;
2) when the mixing amount of the waste gas in the corresponding heat storage chamber needs to be reduced, the adjusting handle drives the adjusting rod to adjust the rotating angle of the horizontal grating, so that the opening degree of the horizontal grating is reduced, and the adjusting amount is controlled by the angle ruler, so that the mixing amount of the waste gas is reduced to a set level;
3) when the waste gas mixing amount in the corresponding heat storage chamber needs to be increased, the adjusting handle is driven to adjust the rotating angle of the horizontal grating, so that the opening degree of the horizontal grating is increased, and the adjusting amount is controlled through the angle ruler, so that the waste gas mixing amount is increased to a set level.
Compared with the prior art, the invention has the beneficial effects that:
1) the number of the openings, the number of the waste gas return branch pipes and the number of the corresponding valves are greatly reduced, the occurrence rate of gas channeling is reduced, the cost is saved, and the overall space occupancy rate of the waste gas return device is reduced;
2) the waste gas distribution device is provided with 2 groups of waste gas distribution mechanisms, the flow guide direction of the waste gas is crossed with the air inflow direction, the mixing effect of the air and the waste gas is enhanced, the air and the waste gas can be fully mixed, and the long-direction heating uniformity of the coke oven is ensured;
3) each group of waste gas distribution mechanisms can control the flow velocity of the airflow entering the small smoke of the coke oven by independently adjusting the opening of the corresponding horizontal grating, thereby controlling the flow of combustion-supporting gas entering a small flue of the coke oven and avoiding the condition of insufficient combustion-supporting air in the vertical flue;
4) the device body of the waste gas distribution device adopts a closed pipe body structure, is connected with 1 pair of corresponding coke oven small flues in a socket fit manner, and is provided with a sealing structure, so that the blowby of a furnace end can be effectively prevented.
Drawings
Fig. 1 is a schematic view of an installation position of the exhaust gas distribution device according to the present invention.
Fig. 2 is a schematic perspective view of the exhaust gas distribution device according to the present invention.
Fig. 3 is a top view of the exhaust gas distribution device of the present invention.
Fig. 4 is a view B-B in fig. 3.
Fig. 5 is a view C-C in fig. 3.
In the figure: 1. waste gas returning device 11, device body 11-1, rectangular box body 11-2, quadrangular frustum-shaped box body 11-3, sealing plate 11-4, bell and spigot 11-5, returned waste gas inlet 12, waste gas distributing mechanism 12-1, horizontal grid 12-2, vertical grid 12-3, adjusting rod 12-4, adjusting handle 12-5, angle scale 2, coke oven small flue 3, waste gas shutter 4, waste gas returning pipeline 5, waste gas returning branch pipe 5
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
as shown in fig. 1 to 5, the waste gas distribution device of the coke oven of the present invention comprises a device body 11 and a waste gas distribution mechanism 12; one end of the device body 11 is connected with 1 pair of coke oven small flues 2 below the corresponding regenerative chambers, and the other end of the device body 11 is connected with the corresponding waste gas shutter 3; the bottom of the device body 11 close to one end of the small flue 2 of the coke oven is provided with a returned waste gas inlet 11-5 which is connected with a waste gas returning pipeline 4 in a waste gas returning system of the coke oven through a waste gas returning branch pipe 5, and the waste gas returning branch pipe 5 is provided with a valve; the device body 11 at the two sides of the returned waste gas inlet 11-5 is internally provided with a clapboard respectively to divide the corresponding end of the device body 11 into 2 gas mixing channels; the exhaust gas distribution mechanism 12 includes a grille disposed on the partition plate and a grille adjustment device disposed outside the device body 11.
The device body 11 consists of a shell, a partition plate and a sealing plate 11-3; the shell consists of a rectangular box body 11-1 and a quadrangular frustum pyramid shaped box body 11-2 which are connected; the outer end of the rectangular box body 11-1 is connected with the corresponding waste gas shutter 3, and the outer end of the quadrangular frustum pyramid shaped box body 11-2 is connected with the corresponding small flue 2 of the coke oven; the outer end of the quadrangular frustum pyramid shaped box body 11-2 is provided with a sealing plate 11-3, and the sealing plate 11-3 is provided with bell and spigot ports at the positions corresponding to the 2 small coke oven flues 2; the 2 partition plates are symmetrically arranged on two sides of a returned waste gas inlet 11-5 in the quadrangular frustum pyramid shaped box body 11-2, and the quadrangular frustum pyramid shaped box body 11-2, the 2 partition plates and the sealing plate 11-3 form a closed structure with a triangular cross section.
The outer end of the rectangular box body 11-1 is connected with the corresponding waste gas shutter 3 through a flange; the outer end of the quadrangular frustum pyramid shaped box body 11-2 is connected with the corresponding small flue 2 of the coke oven in a socket mode, and a sealing structure is arranged at the socket connection position.
The returned exhaust gas inlet 11-5 is connected with the exhaust gas returned branch pipe 5 through a flange.
The device body 11 is made of cast iron.
The grids comprise vertical grids 12-2 arranged on the left side and the right side and horizontal grids 12-1 arranged on the upper side and the lower side; the vertical grille 12-2 is vertically provided with a plurality of strip-shaped fixed ventilation openings; the horizontal grating 12-1 is composed of a plurality of rotatable blades arranged in parallel.
The grating adjusting device consists of an adjusting rod 12-3, an adjusting handle 12-4, an adjusting bracket, a locking mechanism and a bevel protractor 12-5; the rotatable blades are connected in series by the adjusting rod 12-3, and the upper end of the adjusting rod 12-3 penetrates out of the top of the shell; the adjusting bracket is arranged at the top of the shell, the middle part of the adjusting handle 12-4 is hinged with the adjusting bracket through a rotating shaft, and one end of the adjusting handle 12-4 is hinged with the upper end of the adjusting rod 12-3; the adjusting bracket is provided with a rotating shaft locking mechanism and an angle ruler 12-5.
A working method of a waste gas distribution device of a coke oven is used for realizing the waste gas return distribution of the coke oven; the method comprises the following steps:
1) when the airflow in the vertical flue of the coke oven combustion chamber is reversed to be ascending airflow, the air damper corresponding to the waste gas shutter 3 is opened, and simultaneously the waste gas in the waste gas return pipeline 4 enters the corresponding waste gas distribution device 1 through the waste gas return branch pipe 5; the angle of a horizontal grid 12-1 in the waste gas distribution mechanism 12 is adjusted in advance, waste gas is guided by the grid, enters a gas mixing channel to be mixed with air flowing in through a waste gas shutter 3 in a staggered manner, and finally enters a corresponding small flue 2 of the coke oven;
2) when the air flow in the vertical flue of the coke oven combustion chamber is changed into descending air flow, the valve on the corresponding waste gas return branch pipe 5 is closed, and the waste gas in the small flue 2 of the coke oven directly flows into the corresponding waste gas shutter 3 through the waste gas distribution device 1.
A working method of a waste gas distribution device of a coke oven is used for realizing the external adjustment of the coke oven; the method comprises the following steps:
1) when the airflow in the vertical flue of a certain coke oven combustion chamber is reversed to be ascending airflow, the air damper corresponding to the waste gas shutter 3 is opened, and simultaneously, waste gas in the waste gas return distribution pipeline 4 enters the corresponding waste gas distribution device 1 through the waste gas return distribution branch pipe 5;
2) when the mixing amount of the waste gas in the corresponding heat storage chamber needs to be reduced, the adjusting handle 12-4 drives the adjusting rod 12-3 to adjust the rotating angle of the horizontal grating 12-1, so that the opening degree of the horizontal grating 12-1 is reduced, and the adjusting amount is controlled by the angle ruler 12-5 so that the mixing amount of the waste gas is reduced to a set level;
3) when the mixing amount of the waste gas in the corresponding heat storage chamber needs to be increased, the adjusting handle 12-4 drives the adjusting rod 12-3 to adjust the rotating angle of the horizontal grating 12-1, so that the opening of the horizontal grating 12-1 is increased, and the adjusting amount is controlled by the angle ruler 12-5, so that the mixing amount of the waste gas is increased to a set level.
The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation processes are given, but the scope of the invention is not limited to the following examples.
[ example 1 ]
In this embodiment, one end of the exhaust gas distributor 1 is connected to the exhaust gas shutter 3, and the other end is simultaneously connected to the pair of coke oven small flues 2. The bottom of the device body 11 is provided with a return waste gas inlet 11-5 connected with a waste gas return branch pipe 5, and the waste gas return branch pipe 5 is connected with a waste gas return pipeline 4.
1 partition board is respectively arranged in the device body 11 at two sides of the returned exhaust gas inlet 11-5, grids are respectively arranged on the partition boards, each grid comprises a horizontal grid 12-1 at the upper side and a horizontal grid 12-2 at the lower side and a vertical grid 12-2 at the left side and the right side, and the multilayer blades forming the vertical grids 12-2 are fixedly arranged, namely the vertical grids are of a fixed opening structure; the multiple layers of blades forming the horizontal grid 12-1 are rotatable blades, the corresponding ends of the rotatable blades are connected with the same adjusting rod 12-3, and the top end of the adjusting rod 12-3 is connected with an adjusting handle 12-4 at the upper part of the device body 11. The adjusting principle is similar to that of a shutter.
In this embodiment, the device body 11 is made of iron casting. The returned waste gas inlet 11-5 is connected with the waste gas returned branch pipe 5 in a flange fit way. The device body 11 and the exhaust shutter 3 are connected by flange fitting. The refractory brick interface of the corresponding end of the device body 11 and the small flue 2 of the coke oven is installed in a socket joint mode and is sealed by sealing materials.
When the airflow in the vertical flue of the coke oven combustion chamber is reversed to rise, the air damper corresponding to the waste gas shutter 3 is opened, simultaneously, the waste gas enters the waste gas distribution device 1 through the waste gas return branch pipe 5, the waste gas is mixed with the air in a staggered mode after being guided by the waste gas distribution device 12, then enters the corresponding small flue 2 of the coke oven, and finally enters the combustion chamber through the regenerator to realize oxygen-poor combustion, so that the generation of nitrogen oxides is reduced. When the air flow in the vertical flue of the corresponding combustion chamber is changed to descending air flow, the valve on the waste gas return branch pipe 5 is closed, and the waste gas directly flows into the waste gas shutter 3 through the waste gas distribution device 1.
[ example 2 ]
In the embodiment, the coke oven is an externally adjustable coke oven; the exhaust gas distribution device 1 is used for adjusting the mixing amount of the exhaust gas in the single heat storage chamber outside the coke oven.
When the air flow in the vertical flue of a certain combustion chamber is changed to ascending air flow, the air damper corresponding to the waste gas shutter 3 is opened, and simultaneously, waste gas enters the waste gas distribution device 1 through the waste gas return branch pipe 5. When the mixing amount of the waste gas in a certain heat storage chamber needs to be reduced, the adjusting handle 12-4 is pressed downwards to drive the adjusting rod 12-3 to move upwards, the adjusting amount is controlled through the angle ruler 12-5, the adjusting rod 12-3 drives each layer of rotatable blades of the horizontal grating 12-1 to turn over and reduce the opening degree of the rotatable blades simultaneously, the distribution proportion of the waste gas in the waste gas distribution device 1 is changed, and the mixing amount of the waste gas is reduced.
Similarly, when the mixing amount of the waste gas in a certain heat storage chamber needs to be increased, the adjusting handle 12-4 is only lifted up to drive the adjusting rod 12-3 to move downwards, the adjusting amount is controlled by the angle ruler 12-5, the adjusting rod 12-3 drives each layer of rotatable blades of the horizontal grating 12-1 to turn over and increase the opening degree of the rotatable blades simultaneously, and the distribution proportion of the waste gas in the waste gas distribution device 1 is changed, so that the mixing amount of the waste gas is increased.
The waste gas is mixed with air in a staggered way after being guided by the grids, then enters the corresponding small flue 2 of the coke oven, enters the combustion chamber after passing through the regenerator, realizes oxygen-poor combustion, and reduces the generation of nitrogen oxides.
The method is specifically adjusted according to the following steps:
1) the exhaust gas shutter 3 corresponding to the regenerator for the mixing amount of the exhaust gas to be regulated is found, it is checked whether the air damper of the exhaust gas shutter 3 is opened, and it is confirmed whether the valve on the corresponding exhaust gas recirculation branch pipe 5 is normally opened.
2) Recording the angles of angle rulers 12-5 corresponding to adjusting handles 12-4 in 2 exhaust gas distribution mechanisms 11 corresponding to the exhaust gas distribution device 1;
3) the opening degree of the corresponding horizontal grating 12-1 is increased through one adjusting handle 12-4, after the adjusting handle 12-4 is operated in place, the other adjusting handle 12-4 is adjusted reversely, and the adjusting angle value is the same as that of the previous adjusting handle, namely, the opening degree of the other horizontal grating 12-1 is reduced;
4) after the regulation is finished, the specific regulating value of the regulating handle 12-4 in the waste gas distributing device 1 is recorded, so that the waste gas mixing amount of all the regenerative chambers of the coke oven can be conveniently and correspondingly regulated, and finally the combustion condition of each combustion chamber is controlled to reach an ideal state.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The waste gas distribution device of the coke oven is characterized by comprising a device body and a waste gas distribution mechanism; one end of the device body is connected with 1 pair of coke oven small flues below the corresponding regenerative chambers, and the other end of the device body is connected with the corresponding waste gas shutter; a returned waste gas inlet is formed in the bottom of the device body close to one end of the small flue of the coke oven, the returned waste gas inlet is connected with a waste gas returning pipeline in a waste gas returning system of the coke oven through a waste gas returning branch pipe, and a valve is arranged on the waste gas returning branch pipe; the device body at the two sides of the returned waste gas inlet is internally provided with a clapboard respectively to divide the corresponding end of the device body into 2 gas mixing channels; the waste gas distribution mechanism comprises a grating arranged on the partition plate and a grating adjusting device arranged outside the device body.
2. The exhaust gas distribution device of the coke oven as claimed in claim 1, wherein the device body is composed of a casing, a partition plate and a sealing plate; the shell consists of a rectangular box body and a quadrangular frustum pyramid-shaped box body which are connected; the outer end of the rectangular box body is connected with the corresponding waste gas shutter, and the outer end of the quadrangular frustum pyramid shaped box body is connected with the corresponding small flue of the coke oven; the outer end of the quadrangular frustum pyramid shaped box body is provided with a sealing plate, and the sealing plate is provided with bell and spigot ports at the positions corresponding to the 2 small flues of the coke oven; the two sides of the back-matching waste gas inlet in the quadrangular frustum pyramid shaped box body are symmetrically arranged by the 2 partition plates, and the quadrangular frustum pyramid shaped box body, the 2 partition plates and the sealing plate jointly form a closed structure with a triangular cross section.
3. The exhaust gas distribution device of a coke oven according to claim 2, wherein the outer end of the rectangular box is connected with the corresponding exhaust gas shutter through a flange; the outer end of the quadrangular frustum pyramid shaped box body is connected with the corresponding small flue of the coke oven in a socket joint mode, and a sealing structure is arranged at the socket joint.
4. The exhaust gas distribution device of the coke oven of claim 1, wherein the return exhaust gas inlet is connected with the exhaust gas return branch pipe through a flange.
5. The exhaust gas distribution device of the coke oven as set forth in claim 1, wherein the device body is made of cast iron.
6. The exhaust gas distribution device of the coke oven as set forth in claim 1, wherein the grids comprise vertical grids disposed at left and right sides and horizontal grids disposed at upper and lower sides; a plurality of strip-shaped fixed ventilation openings are formed in the vertical grating along the vertical direction; the horizontal grating is composed of a plurality of rotatable blades arranged in parallel.
7. The exhaust gas distribution device of the coke oven as claimed in claim 1, wherein the grille adjusting device is composed of an adjusting rod, an adjusting handle, an adjusting bracket, a locking mechanism and a bevel protractor; the rotatable blades are strung together by the adjusting rod, and the upper end of the adjusting rod penetrates out of the top of the shell; the adjusting bracket is arranged at the top of the shell, the middle part of the adjusting handle is hinged with the adjusting bracket through a rotating shaft, and one end of the adjusting handle is hinged with the upper end of the adjusting rod; the adjusting bracket is provided with a rotating shaft locking mechanism and an angle ruler.
8. The working method of the waste gas distribution device of the coke oven as claimed in any one of claims 1 to 7, characterized in that the device is used for realizing the waste gas return distribution of the coke oven; the method comprises the following steps:
1) when the airflow in the vertical flue of the coke oven combustion chamber is reversed to be ascending airflow, the air damper corresponding to the waste gas shutter is opened, and simultaneously, the waste gas in the waste gas return pipeline enters the corresponding waste gas distribution device through the waste gas return branch pipe; the angle of a horizontal grid in the waste gas distribution mechanism is adjusted in advance, waste gas is guided by the grid, enters a gas mixing channel to be mixed with air flowing in through a waste gas shutter in a staggered manner, and finally enters a corresponding small flue of the coke oven;
2) when the airflow in the vertical flue of the coke oven combustion chamber is changed into descending airflow, the valve on the corresponding waste gas return branch pipe is closed, and the waste gas in the small flue of the coke oven directly flows into the corresponding waste gas shutter through the waste gas distribution device.
9. The operating method of the waste gas distributor of coke oven according to any of claims 1 to 7, characterized in that it is used to realize the external adjustment of coke oven; the method comprises the following steps:
1) when the airflow in the vertical flue of a certain coke oven combustion chamber is reversed to be ascending airflow, the air damper corresponding to the waste gas shutter is opened, and simultaneously, waste gas in the waste gas return pipeline enters the corresponding waste gas distribution device through the waste gas return branch pipe;
2) when the mixing amount of the waste gas in the corresponding heat storage chamber needs to be reduced, the adjusting handle drives the adjusting rod to adjust the rotating angle of the horizontal grating, so that the opening degree of the horizontal grating is reduced, and the adjusting amount is controlled by the angle ruler, so that the mixing amount of the waste gas is reduced to a set level;
3) when the waste gas mixing amount in the corresponding heat storage chamber needs to be increased, the adjusting handle is driven to adjust the rotating angle of the horizontal grating, so that the opening degree of the horizontal grating is increased, and the adjusting amount is controlled through the angle ruler, so that the waste gas mixing amount is increased to a set level.
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