CN214528832U - Heating system of rich gas coke oven - Google Patents
Heating system of rich gas coke oven Download PDFInfo
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- CN214528832U CN214528832U CN202023096868.6U CN202023096868U CN214528832U CN 214528832 U CN214528832 U CN 214528832U CN 202023096868 U CN202023096868 U CN 202023096868U CN 214528832 U CN214528832 U CN 214528832U
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Abstract
The utility model relates to a coke oven technical field especially relates to a rich gas coke oven heating system. Comprises a rich gas pipeline, an exchange shutter, a small flue, a combustion chamber and a heat exchange area; the combustion chamber is provided with a plurality of pairs of fire tunnels, each fire tunnel partition wall is provided with more than one middle combustion-supporting gas outlet, the bottom is provided with a bottom combustion-supporting gas outlet and a rich gas outlet, and the rich gas outlet is connected with a rich gas pipeline; the heat exchange area is divided into a plurality of independent heat exchange areas, and each independent heat exchange area at least corresponds to one pair of vertical flues; the small flues are horizontally arranged and communicated with the plurality of independent heat exchange areas, the small flues are connected with the exchange shutter, when the exchange shutter is opened, the small flues are connected with the combustion-supporting gas inlet, and when the exchange shutter is closed, the small flues are connected with the waste gas system pipeline. The utility model can change the state of the coke oven combustion system at any time according to the production condition of the coke oven, meet the production demand and have simple and safe adjustment mode.
Description
Technical Field
The utility model relates to a coke oven technical field especially relates to a rich gas coke oven heating system.
Background
The capacity of the domestic independent coking plant accounts for more than 50 percent of the total coke capacity, the steel and iron combined enterprise has blast furnace gas as a lean gas heat source, the independent coking plant does not have the blast furnace gas as the lean gas heat source, and only purified coke oven gas or other rich gas in the plant can be used as the heat source.
The adoption of rich gas such as coke oven gas as a heat source has a great number of problems. Firstly, the rich gas has high heat value and short flame, which causes poor uniformity of high-direction heating, causes high emission of nitrogen oxides in the coke oven, and meanwhile, local coke is easy to be overfire, the coke quality is seriously influenced, and even the strength of the coke after reaction is greatly reduced; in addition, the coke oven adjusting parts are all in a medium-high temperature area, so that the coke oven is difficult to adjust and has poor safety.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a rich gas coke oven heating system. The utility model discloses a high-efficient clear adoption rich gas heats the coke oven heating system who is convenient for adjust, can change coke oven combustion system state at any time according to the coke oven production condition, satisfies the production demand, and the adjustment mode is simple safety.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a heating system of a rich gas coke oven comprises a rich gas pipeline, an exchange shutter, a small flue, a combustion chamber and a heat exchange area; the combustion chamber is provided with a plurality of pairs of fire tunnels, each fire tunnel partition wall is provided with more than one middle combustion-supporting gas outlet, the bottom is provided with a bottom combustion-supporting gas outlet and a rich gas outlet, and the rich gas outlet is connected with a rich gas pipeline; the bottom combustion-supporting gas inlet is communicated with the bottom combustion-supporting gas outlet of each vertical flue of the corresponding combustion chamber, and the middle combustion-supporting gas inlet is communicated with the middle combustion-supporting gas outlet of the vertical flue of the corresponding combustion chamber; the heat exchange area is divided into a plurality of independent heat exchange areas, and each independent heat exchange area at least corresponds to one pair of vertical flues; the small flues are horizontally arranged and communicated with the plurality of independent heat exchange areas, the small flues are connected with the exchange shutter, when the exchange shutter is opened, the small flues are connected with the combustion-supporting gas inlet, and when the exchange shutter is closed, the small flues are connected with the waste gas system pipeline.
The rich gas pipeline comprises a rich gas main pipe, a rich gas branch pipe and a rich gas branch pipe; the main rich gas pipe is provided with a plurality of branch rich gas pipes which are connected with the combustion chamber through a rich gas outlet.
The rich gas branch pipe inlet is provided with a rich gas branch pipe adjusting device, and the connection part of the rich gas branch pipe and the rich gas outlet is provided with a rich gas branch pipe adjusting device.
The rich gas branch pipe adjusting device and the rich gas branch pipe adjusting device are adjusted by adopting replaceable pore plates or nozzles with fixed apertures.
The pair of vertical flues comprises an ascending vertical flue and a descending vertical flue, the gas combustion flue is the ascending vertical flue, the flue for descending exhaust of the combusted waste gas is the descending vertical flue, and every time a period passes, the two vertical flues are mutually converted.
And a combustion-supporting gas flow total regulating device is arranged at the inlet of the exchange shutter and the combustion-supporting gas, and an exhaust gas flow regulating device is arranged at the joint of the exchange shutter and the exhaust gas system pipeline. The combustion-supporting gas flow total regulating device and the waste gas flow regulating device both adopt butterfly valves.
The vertical flue partition wall and the bottom outlet of the vertical flue are provided with coarse adjusting devices, and the joint of the small flue and each independent heat exchange area is provided with a fine adjusting device.
The coarse adjusting device adjusts the flow rate by adopting a mode of sliding adjusting bricks or replacing adjusting bricks with different thicknesses.
The fine adjustment device adopts the mode of sliding adjustment brick or changing the adjustment brick with different thickness to adjust the flow, or adopts the mode of different gas circulation interfaces on the adjustment plate to adjust the flow.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a high-efficient clear adoption rich gas heats the coke oven heating system who is convenient for adjust, can change coke oven combustion system state at any time according to the coke oven production condition, satisfies the production demand, and the adjustment mode is simple safety. And the heating system is simple, the emission of nitrogen oxides is reduced, the quality of coke is improved, the heat consumption for coking is reduced, and the additional investment is not increased.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of the structure of a vertical flue of the present invention.
In the figure: 1-exchange shutter, 2-small flue, 3-independent heat exchange zone, 4-combustion chamber, 5-main rich gas pipe, 6-branch rich gas pipe, 7-branch rich gas pipe, 8-waste gas system pipeline, 9-ascending vertical flue, 10-descending vertical flue, 11-middle combustion-supporting gas outlet, 12-bottom combustion-supporting gas outlet, 13-rich gas outlet, 14-combustion-supporting gas inlet, 15-middle combustion-supporting gas inlet adjusting device, 16-bottom combustion-supporting gas inlet adjusting device, 17-middle waste gas discharging adjusting device, 18-bottom waste gas discharging adjusting device, 19-middle combustion-supporting gas rough adjusting device, 20-bottom combustion-supporting gas rough adjusting device, 21-middle combustion-supporting gas fine adjusting device, 22-bottom combustion-supporting gas fine adjusting device, 23-a gas-rich branch pipe adjusting device and 24-a gas-rich branch pipe adjusting device.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
example (b):
as shown in fig. 1 and 2, the heating system of the rich gas coke oven comprises a rich gas pipeline, an exchange shutter 1, a small flue 2, a combustion chamber 4 and a heat exchange zone.
The rich gas pipeline comprises a rich gas main pipe 5, rich gas branch pipes 6 and rich gas branch pipes 7, the rich gas main pipe 5 is provided with a plurality of rich gas branch pipes 6, the rich gas branch pipes 6 are provided with a plurality of rich gas branch pipes 7, and the rich gas branch pipes 7 are connected with the combustion chamber 4.
The combustion chamber 4 is divided into a plurality of vertical flame paths through partition walls, each two vertical flame paths are in a pair, wherein a gas combustion flame path is an ascending vertical flame path 9, a flame path for descending and discharging combusted waste gas is a descending vertical flame path 10, and the two flame paths are mutually exchanged after each period; each vertical flue partition wall is provided with at least one middle combustion-supporting gas outlet 11, and the bottom is provided with a bottom combustion-supporting gas outlet 12 and a rich gas outlet 13. The rich gas outlet 13 is connected with the rich gas branch pipe 7.
The heat exchange area is divided into a plurality of independent heat exchange areas 3, and each independent heat exchange area 3 at least corresponds to one pair of flame paths; the small flue 2 is horizontally arranged and leads to a plurality of independent heat exchange areas 3; the small flue 2 is connected with the exchange shutter 1, the exchange shutter 1 is in an open and closed state, when the exchange shutter 1 is opened, the small flue 2 is connected with the combustion-supporting gas inlet, and when the exchange shutter 1 is closed, the small flue 2 is connected with the exhaust gas system pipeline 8.
The bottom combustion-supporting gas inlet 14 is communicated with the bottom combustion-supporting gas outlet 12 of each vertical flue of the corresponding combustion chamber, and the middle combustion-supporting gas inlet 14 is communicated with the middle combustion-supporting gas outlet 11 of the vertical flue of the corresponding combustion chamber.
The exchange shutter 1 and the combustion-supporting gas inlet are provided with a middle combustion-supporting gas inlet regulating device 15 and a bottom combustion-supporting gas inlet regulating device 16, and the joint of the exchange shutter 1 and the waste gas system pipeline 8 is provided with a middle waste gas discharge regulating device 17 and a bottom waste gas discharge regulating device 18. The middle combustion-supporting gas inlet adjusting device 15 and the bottom combustion-supporting gas inlet adjusting device 16 both adopt metal plates to adjust inlet sections, and the middle waste gas discharge adjusting device 17 and the bottom waste gas discharge adjusting device 18 both adopt butterfly valves.
The combustion-supporting gas is provided with a middle combustion-supporting gas coarse adjusting device 19 and a bottom combustion-supporting gas coarse adjusting device 20 at the outlets of the partition wall of the vertical flue and the bottom of the vertical flue, a middle combustion-supporting gas fine adjusting device 21 and a bottom combustion-supporting gas fine adjusting device 22 are arranged at the joint of the small flue and each independent heat exchange area, a rich gas branch pipe adjusting device 23 is arranged at the joint of each rich gas branch pipe 7 and the brick gas channel, and a rich gas branch pipe adjusting device 24 is arranged at the position of each rich gas branch pipe 6. The rich gas branch pipe adjusting device 23 and the rich gas branch pipe adjusting device 24 are adjusted by replaceable orifice plates or nozzles with fixed apertures. The coarse adjusting device adjusts the flow by adopting a sliding adjusting brick or a mode of changing adjusting bricks with different thicknesses. The fine adjustment device adopts the mode of sliding adjustment brick or changing adjustment brick with different thickness to adjust the flow, or adopts the mode of different gas circulation interfaces on the adjustment plate to adjust the flow.
In the states shown in fig. 1 and fig. 2, when the exchange shutter 1 corresponding to the rising flue 9 is in an open state, the bottom combustion-supporting gas enters the small flue 2 through the combustion-supporting gas inlet 14 and the bottom combustion-supporting gas inlet adjusting device 16, and the heat stored in the independent heat exchange area is transferred to the combustion-supporting gas through the independent heat exchange area 3 and then enters the bottom of the rising flue 9. Similarly, the middle combustion-supporting gas enters the small flue 2 through the combustion-supporting gas inlet 14 and the middle combustion-supporting gas inlet adjusting device 15, and the heat stored in the independent heat exchange area is transferred to the combustion-supporting gas through the independent heat exchange area 3 and then enters the middle part of the ascending vertical flue 9. The adjusting device mainly adjusts the longitudinal uniformity of the vertical flame paths of the combustion chamber, and avoids the condition of poor longitudinal heating uniformity caused by too much or too little combustion-supporting gas in one pair of vertical flame paths.
In the states shown in fig. 1 and fig. 2, the rich gas branch pipe adjusting device 24 corresponding to the ascending vertical flue 9 is in an open state, the rich gas branch pipe adjusting device 24 corresponding to the descending vertical flue 10 is in a closed state, rich gas enters the rich gas branch pipe 6 through the rich gas main pipe 5, passes through the rich gas branch pipe 7 and then enters the bottom of the ascending vertical flue 9 through the rich gas outlet 13, wherein the rich gas amount entering each combustion chamber 4 is adjusted through the rich gas branch pipe adjusting device 24, the long-direction uniformity of the combustion chamber vertical flue is adjusted through the rich gas branch pipe adjusting device 23, and the condition that the long-direction heating uniformity is poor due to too much or too little rich gas in a certain vertical flue is avoided.
In the state shown in fig. 1 and 2, in the ascending vertical flue 9, the rich gas is firstly combusted with the bottom combustion-supporting gas, the rich gas which is not combusted is combusted with the middle combustion-supporting gas, and the gas flow of the bottom combustion-supporting gas and the middle combustion-supporting gas can be directly adjusted by the bottom combustion-supporting gas inlet adjusting device 16 and the middle combustion-supporting gas inlet adjusting device 15 at the cold end, so that the high-direction heating uniformity in the ascending vertical flue 9 is adjusted.
In the state shown in fig. 1 and 2, in the descending vertical flue 10, the exhaust gas generated after combustion enters the independent heat exchange area 3 through the middle combustion-supporting gas outlet 11 and the bottom combustion-supporting gas outlet 12, respectively, the heat of the exhaust gas is transferred to the independent heat exchange area 3, and finally enters the exhaust gas system pipeline 8 through the middle exhaust gas discharge adjusting device 17 and the bottom exhaust gas discharge adjusting device 18 to be discharged outside the combustion system.
After the exchange of the exchange shutter 1, the ascending vertical flue 9 and the descending vertical flue 10 are switched, so that the corresponding bottom combustion-supporting gas fine adjustment device 22 and the middle combustion-supporting gas fine adjustment device 21 and the corresponding bottom combustion-supporting gas coarse adjustment device 20 and the middle combustion-supporting gas coarse adjustment device 19 are changed into fixed settings after being exchanged. The proportion of the discharged waste gas can be adjusted by the opening proportions of the middle waste gas discharge adjusting device 17 and the bottom waste gas discharge adjusting device 18, so that the heat exchange amount of the independent heat exchange area 3 is influenced, and the temperature of the discharged waste gas and the heat exchange amount of the ascending vertical flue 9 corresponding to the independent heat exchange area 3 are influenced.
The middle combustion-supporting gas inlet adjusting device 15, the bottom combustion-supporting gas inlet adjusting device 16 and the rich gas branch adjusting device 24 are in normal temperature positions, and adjustment is most convenient and safe.
The bottom combustion-supporting gas fine-tuning device 22 and the middle combustion-supporting gas fine-tuning device 21 are located at the middle temperature positions of 300-400 ℃, and are difficult to adjust. The flow regulation can be carried out by adopting a mode of sliding the regulating brick or changing and increasing or decreasing the regulating brick with different thicknesses, and a mode of regulating different gas circulation interfaces on the plate can also be adopted.
The bottom combustion-supporting gas coarse adjusting device 20 and the middle combustion-supporting gas coarse adjusting device 19 are located at high-temperature positions above 1300 ℃, the adjustment is the most difficult, and the safety is poor. The high-temperature resistant refractory bricks can be adopted as sliding adjusting bricks or the adjusting bricks with different thicknesses can be replaced to adjust the flow.
The utility model discloses a theory of operation and working process specifically include following step:
A. under the condition that a coarse adjusting device and a fine adjusting device of combustion-supporting gas operate normally, when abnormal production conditions such as abnormal furnace top space temperature, abnormal coke height temperature difference or abnormal NOx emission occur, the normal temperature end outside the furnace controls the total heat supply in the combustion chambers and the distribution proportion of the combustion-supporting gas at the bottom and the middle of the vertical flue by adjusting a middle combustion-supporting gas inlet adjusting device 15, a bottom combustion-supporting gas inlet adjusting device 16 and a rich gas branch pipe adjusting device 24;
B. when a temperature abnormity occurs in a certain vertical flame path of a certain combustion chamber, the distribution of combustion-supporting gas in each vertical flame path is adjusted through the middle-temperature end bottom combustion-supporting gas fine adjusting device 22 and the middle combustion-supporting gas fine adjusting device 21, and the rich gas distribution in each vertical flame path is adjusted by matching with the rich gas branch pipe adjusting device 23, and then the adjusting step A is repeated;
C. when the distribution of the combustion-supporting gas in each vertical flue can not be adjusted uniformly by the fine adjustment device, the adjustment step B is carried out after the adjustment by the bottom combustion-supporting gas coarse adjustment device 20 and the middle combustion-supporting gas coarse adjustment device 19 is needed;
D. when the exhaust gas temperature is too low or too high, the middle exhaust gas discharge regulating device 17 and the bottom exhaust gas discharge regulating device 18 can be properly adjusted, and the exhaust gas temperature can be properly changed;
E. when the NOx emission value is too high, the middle waste gas discharge adjusting device 17 and the bottom waste gas discharge adjusting device 18 can be properly adjusted, and the heat exchange amount of the independent heat exchange zone 3 is adjusted, so that the temperature of combustion-supporting gas entering the bottom and the middle is adjusted, and the NOx emission value is reduced.
The utility model discloses a high-efficient clear adoption rich gas heats the coke oven heating system who is convenient for adjust, can change coke oven combustion system state at any time according to the coke oven production condition, satisfies the production demand, and the adjustment mode is simple safety. And the heating system is simple, the emission of nitrogen oxides is reduced, the quality of coke is improved, the heat consumption for coking is reduced, and the additional investment is not increased.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (9)
1. A rich gas coke oven heating system is characterized by comprising a rich gas pipeline, an exchange shutter, a small flue, a combustion chamber and a heat exchange zone; the combustion chamber is provided with a plurality of pairs of fire tunnels, each fire tunnel partition wall is provided with more than one middle combustion-supporting gas outlet, the bottom is provided with a bottom combustion-supporting gas outlet and a rich gas outlet, and the rich gas outlet is connected with a rich gas pipeline; the bottom combustion-supporting gas inlet is communicated with the bottom combustion-supporting gas outlet of each vertical flue of the corresponding combustion chamber, and the middle combustion-supporting gas inlet is communicated with the middle combustion-supporting gas outlet of the vertical flue of the corresponding combustion chamber; the heat exchange area is divided into a plurality of independent heat exchange areas, and each independent heat exchange area at least corresponds to one pair of vertical flues; the small flues are horizontally arranged and communicated with the plurality of independent heat exchange areas, the small flues are connected with the exchange shutter, when the exchange shutter is opened, the small flues are connected with the combustion-supporting gas inlet, and when the exchange shutter is closed, the small flues are connected with the waste gas system pipeline.
2. The rich gas coke oven heating system of claim 1, wherein the rich gas conduit comprises a main rich gas conduit, a branch rich gas conduit and a branch rich gas conduit; the main rich gas pipe is provided with a plurality of branch rich gas pipes which are connected with the combustion chamber through a rich gas outlet.
3. The heating system of claim 2, wherein the rich gas branch inlet is provided with a rich gas branch adjusting device, and the connection between the rich gas branch and the rich gas outlet is provided with a rich gas branch adjusting device.
4. The heating system of claim 3, wherein the gas-rich branch regulating device and the gas-rich branch regulating device are both regulated by replaceable fixed-bore orifice plates or nozzles.
5. The heating system of claim 1, wherein the pair of vertical flues comprises an ascending vertical flue and a descending vertical flue, the gas combustion flue is the ascending vertical flue, the flue for descending exhaust of combusted waste gas is the descending vertical flue, and the two vertical flues are switched with each other every time a cycle passes.
6. The heating system of the coke oven with rich gas of claim 1, wherein a combustion-supporting gas flow total regulating device is arranged at the inlet of the exchange shutter and the combustion-supporting gas, and an exhaust gas flow regulating device is arranged at the joint of the exchange shutter and the pipeline of the exhaust gas system.
7. The heating system of the gas-rich coke oven as claimed in claim 1, wherein coarse adjusting devices are arranged at outlets of the partition wall of the vertical flue and the bottom of the vertical flue, and fine adjusting devices are arranged at the joints of the small flue and each independent heat exchange area.
8. The heating system of the gas-rich coke oven of claim 7, wherein the coarse adjustment device is used for adjusting the flow rate by sliding the adjusting bricks or changing the adjusting bricks with different thicknesses.
9. The heating system of claim 7, wherein the fine adjustment device is configured to adjust the flow rate by sliding the adjusting bricks or changing the adjusting bricks with different thicknesses, or by using different gas flow interfaces on the adjusting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023096868.6U CN214528832U (en) | 2020-12-21 | 2020-12-21 | Heating system of rich gas coke oven |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023096868.6U CN214528832U (en) | 2020-12-21 | 2020-12-21 | Heating system of rich gas coke oven |
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| Publication Number | Publication Date |
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| CN214528832U true CN214528832U (en) | 2021-10-29 |
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| CN202023096868.6U Active CN214528832U (en) | 2020-12-21 | 2020-12-21 | Heating system of rich gas coke oven |
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- 2020-12-21 CN CN202023096868.6U patent/CN214528832U/en active Active
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