CN110616079B - Coal charging process for reducing emission of sulfur dioxide from source - Google Patents
Coal charging process for reducing emission of sulfur dioxide from source Download PDFInfo
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- CN110616079B CN110616079B CN201910924191.3A CN201910924191A CN110616079B CN 110616079 B CN110616079 B CN 110616079B CN 201910924191 A CN201910924191 A CN 201910924191A CN 110616079 B CN110616079 B CN 110616079B
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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
- C10B31/00—Charging devices
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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
- C10B43/00—Preventing or removing incrustations
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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
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
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Abstract
The invention relates to a coal charging process for reducing emission of sulfur dioxide from a source, which is characterized in that before the top-charging coke oven is subjected to coal charging operation again, combustible substances are introduced into a carbonization chamber to perform combustion reaction with oxygen in the carbonization chamber, oxygen in the carbonization chamber is consumed, an anoxic environment is formed in the carbonization chamber, the coal material is prevented from performing combustion reaction with the oxygen in the carbonization chamber during the coal charging operation again, and the generation and the emission of sulfur dioxide are reduced from the source. After the combustible substances are used for consuming the oxygen in the carbonization chamber, the high-pressure ammonia water injection device corresponding to the carbonization chamber in the gas collection and purification system is started, so that the residual oxygen in the carbonization chamber can be effectively removed on the basis of realizing the sufficient combustion of the combustible substances and the oxygen components in the carbonization chamber.
Description
Technical Field
The invention relates to the technical field of control of atmospheric pollutants in the production process of a coke oven, in particular to a coal charging process for reducing emission of sulfur dioxide from a source.
Background
During the process of charging coal into the top-charging coke oven, a large amount of smoke dust is generated at the moment when the coal enters the carbonization chamber, and due to the coke pushing operation of the carbonization chamber before charging the coal, the carbonization chamber of the coke oven undergoes the processes of door removal, coke pushing and oven door closing, during the period of door removal and oven door closing, the carbonization chamber is communicated with the outside atmosphere, and the air outside the carbonization chamber enters the carbonization chamber. Therefore, when coal is subsequently charged into the carbonization chamber, the coal material is subjected to a combustion reaction with oxygen in the air entering the carbonization chamber during the opening period of the carbonization chamber under a high-temperature environment, and a certain amount of SO is generated during combustion due to sulfur content in the coal material2SO formed2When coal is charged, part of the coal enters the coal charging and dust removing system along with coal charging smoke dust, SO that the SO at the discharge port of the coal charging and dust removing system2Exceeding the relevant environmental standard limits.
SO discharged by a coke oven coal charging dust removal system in the coal charging process2Due to its associated coal-charging smoke dust generationDue to the instantaneous intermittence, the difficulty is caused to the stable and efficient desulfurization of the subsequent smoke dust, and the investment cost of enterprises is greatly increased due to the construction and operation of desulfurization facilities.
Disclosure of Invention
The invention provides a coal charging process for reducing emission of sulfur dioxide from a source, which is characterized in that before coal is charged into a carbonization chamber, combustible substances and oxygen in the carbonization chamber are subjected to combustion reaction to consume oxygen in the carbonization chamber, an anoxic environment is formed in the carbonization chamber, and coal materials enter the carbonization chamber and cannot be subjected to combustion reaction with the oxygen again during coal charging, SO that SO is avoided2To realize the SO of the coal charging process2And (4) emission reduction of the source.
In order to achieve the purpose, the invention adopts the following technical scheme:
before the top-charging coke oven is subjected to secondary coal charging operation, combustible substances are introduced into a carbonization chamber to perform combustion reaction with oxygen in the carbonization chamber, oxygen in the carbonization chamber is consumed, an anoxic environment is formed in the carbonization chamber, the coal material is prevented from performing combustion reaction with the oxygen in the carbonization chamber during secondary coal charging, and the generation and emission of sulfur dioxide are reduced from the source.
After the combustible substances consume the oxygen in the carbonization chamber, a high-pressure ammonia water injection device corresponding to the carbonization chamber in the gas collection and purification system is started, and the flue gas generated after the combustible substances and the oxygen are combusted is guided into the gas collection and purification system.
A coal charging process for reducing emission of sulfur dioxide from a source specifically comprises the following steps:
1) before the operation of charging coal into a carbonization chamber of a top charging coke oven is started, a coal charging smoke dust collecting device at the top of the oven is firstly communicated with a coal charging port at the top of the carbonization chamber;
2) adjusting a fan of a coal-charging dust removal system from a low speed to a medium-high speed, wherein the low speed is 20% -30% of the rated rotating speed of the fan, and the medium-high speed is 60% -100% of the rated rotating speed of the fan; simultaneously starting a high-pressure ammonia water injection device in the coal gas collecting and purifying system, which corresponds to the carbonization chamber;
3) introducing combustible substances into the carbonization chamber, and consuming oxygen in the carbonization chamber by utilizing the combustible substances to perform combustion reaction with oxygen in the carbonization chamber;
4) introducing flue gas generated after combustible substances and oxygen are combusted into a coal gas collecting and purifying system by using a high-pressure ammonia water injection device; simultaneously, the high-speed operation of a fan of the coal charging and dust removing system is kept, and the residual flue gas in the carbonization chamber is sent into a dust removing device through a coal charging and dust removing pipeline and is discharged after being purified;
5) the introduction of combustible material into the carbonization chamber is stopped and the coal charging operation is started.
A coal charging process for reducing emission of sulfur dioxide from a source specifically comprises the following steps:
1) before the operation of charging coal into a carbonization chamber of a top charging coke oven is started, a coal charging smoke dust collecting device at the top of the oven is firstly communicated with a coal charging port at the top of the carbonization chamber;
2) adjusting a fan of the coal charging and dust removing system from a low speed to a medium-high speed;
3) introducing combustible substances into the carbonization chamber, and consuming oxygen in the carbonization chamber by utilizing the combustion reaction of the combustible substances and oxygen in the carbonization chamber;
4) the high-speed operation in a fan of the coal charging and dust removing system is kept, and the flue gas generated after the combustible substances and the oxygen are combusted is sent into a dust removing device through a coal charging and dust removing pipeline and is discharged after being purified;
6) and stopping introducing the combustible substances into the carbonization chamber, starting a high-pressure ammonia water injection facility corresponding to the carbonization chamber in the gas collection and purification system, and starting the coal charging operation.
The carbonization chamber is provided with a combustible substance inlet, and the combustible substance is hydrogen, carbon monoxide, coke oven gas subjected to fine desulfurization treatment, or other solid combustible substances or combustible gases without sulfur.
The furnace doors on the two sides of the carbonization chamber to be charged with coal are closed, and the combustible substances are introduced into the carbonization chamber at the moment before the coal charging operation of the carbonization chamber.
The operation of connecting the coal charging smoke dust collecting device at the top of the furnace with the coal charging port at the top of the carbonization chamber is carried out 1-5 min before the charging operation is started.
The fan of the coal charging and dust removing system is adjusted from low speed to medium-high speed, and the operation is started at least 5s before the operation of introducing combustible substances into the carbonization chamber.
Starting the operation of a high-pressure ammonia water injection device corresponding to the carbonization chamber in the coal gas collection and purification system, and starting to operate at least 5s before the operation of introducing combustible substances into the carbonization chamber.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention can effectively avoid the combustion reaction between the coal material entering the carbonization chamber and oxygen when the coal is charged again, and because the carbonization chamber is in an anoxic environment, the sulfur in the coal material can not be subjected to the combustion reaction with the oxygen to generate sulfur dioxide; thereby realizing source emission reduction in the coal charging process and reducing the generation and emission of sulfur dioxide;
2) when the high-pressure ammonia water injection device in the gas collection and purification system normally operates, part of oxygen in the carbonization chamber can be brought into the gas collection and purification system together, but the oxygen-deficient environment cannot be completely formed in the carbonization chamber; the invention firstly adjusts the fan in the coal-charging dust-removing system from low speed to medium and high speed, consumes the oxygen in the carbonization chamber by using combustible substances, and then starts the high-pressure ammonia water injection device corresponding to the carbonization chamber in the coal gas collection and purification system, thereby effectively removing the residual oxygen in the carbonization chamber on the basis of realizing the full combustion of the combustible substances and the oxygen components in the carbonization chamber.
Drawings
FIG. 1 is a schematic diagram of a coal charging process for reducing sulfur dioxide emission from a source according to the present invention.
In the figure: 1. a carbonization chamber 2, a coal gas collecting and purifying system 3, a combustible material inlet 4, a coal charging and dust removing system
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
as shown in figure 1, before the top-loading coke oven is subjected to the secondary coal loading operation, combustible substances are introduced into the carbonization chamber 1 to perform a combustion reaction with oxygen in the carbonization chamber 1, oxygen in the carbonization chamber 1 is consumed, an oxygen-deficient environment is formed in the carbonization chamber 1, the coal material and the oxygen in the carbonization chamber 1 are prevented from performing the combustion reaction during the secondary coal loading, and the generation and the emission of sulfur dioxide are reduced from the source.
After the combustible materials are used for consuming the oxygen in the carbonization chamber 1, a high-pressure ammonia water injection device corresponding to the carbonization chamber 1 in the gas collection and purification system 2 is started, and the flue gas generated after the combustible materials and the oxygen are combusted is led into the gas collection and purification system 2.
The invention relates to a coal charging process for reducing emission of sulfur dioxide from a source, which specifically comprises the following steps:
1) before the operation of charging coal into a carbonization chamber 1 of a top-charging coke oven is started, a coal-charging smoke dust collecting device at the top of the oven is firstly communicated with a coal charging port at the top of the carbonization chamber 1;
2) adjusting a fan of the coal charging and dust removing system 4 from a low speed to a medium-high speed, wherein the low speed is 20% -30% of the rated rotating speed of the fan, and the medium-high speed is 60% -100% of the rated rotating speed of the fan; simultaneously starting a high-pressure ammonia water injection device in the coal gas collecting and purifying system 2 corresponding to the carbonization chamber 1;
3) combustible materials are introduced into the carbonization chamber 1, and the combustible materials and oxygen in the carbonization chamber 1 are subjected to combustion reaction to consume the oxygen in the carbonization chamber;
4) introducing flue gas generated after combustible substances and oxygen are combusted into a coal gas collecting and purifying system 2 by using a high-pressure ammonia water injection device; meanwhile, the high-speed operation of a fan of the coal charging and dust removing system 4 is kept, and the residual flue gas in the carbonization chamber 1 is sent into a dust removing device through a coal charging and dust removing pipeline and is discharged after being purified;
5) the introduction of the combustible material into the coking chamber 1 is stopped and the coal charging operation is started.
The invention relates to a coal charging process for reducing emission of sulfur dioxide from a source, which specifically comprises the following steps:
1) before the operation of charging coal into a carbonization chamber 1 of a top-charging coke oven is started, a coal-charging smoke dust collecting device at the top of the oven is firstly communicated with a coal charging port at the top of the carbonization chamber 1;
2) adjusting a fan of the coal charging and dust removing system 4 from a low speed to a medium-high speed;
3) combustible materials are introduced into the carbonization chamber 1, and oxygen in the carbonization chamber is consumed by the combustion reaction of the combustible materials and oxygen in the carbonization chamber 1;
4) keeping the high-speed operation in a fan of the coal charging and dust removing system 4, feeding the flue gas generated after the combustible substances and the oxygen are combusted into a dust removing device through a coal charging and dust removing pipeline, and discharging the flue gas after purification;
6) stopping introducing the combustible substances into the carbonization chamber 1, starting a high-pressure ammonia water injection facility corresponding to the carbonization chamber 1 in the coal gas collection and purification system 2, and starting the coal charging operation.
The carbonization chamber 1 is provided with a combustible substance inlet 3, and the combustible substance is hydrogen, carbon monoxide, coke oven gas subjected to fine desulfurization treatment, or other solid combustible substances or combustible gases without sulfur.
The furnace doors on two sides of the carbonization chamber 1 to be charged with coal are closed, and the combustible substances are introduced into the carbonization chamber at the moment before the carbonization chamber 1 is charged with coal.
The operation of connecting the coal charging smoke dust collecting device at the top of the furnace and the coal charging port at the top of the carbonization chamber 1 is carried out 1-5 min before the charging operation is started.
The 4 fans of the coal charging and dust removing system are adjusted from low speed to medium and high speed, and the operation is started at least 5s before the operation of introducing combustible materials into the carbonization chamber 1.
The operation of the high-pressure ammonia water injection device in the coal gas collection and purification system 2 corresponding to the carbonization chamber 1 is started, and the operation is started at least 5s before the operation of introducing combustible substances into the carbonization chamber 1.
The introduction amount of the combustible substance is determined by calculation according to the type of the combustible substance and the principle that the combustible substance and the oxygen generate combustion reaction to consume the oxygen in the carbonization chamber completely. Before the operation of introducing combustible substances into the carbonization chamber is stopped, the fan of the coal-charging dust-removing system is not required to be adjusted to a low speed.
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. A coal charging process for reducing emission of sulfur dioxide from a source is characterized in that before the top-charging coke oven is subjected to secondary coal charging operation, combustible substances are introduced into a carbonization chamber to perform combustion reaction with oxygen in the carbonization chamber, oxygen in the carbonization chamber is consumed, an anoxic environment is formed in the carbonization chamber, the coal material is prevented from performing combustion reaction with the oxygen in the carbonization chamber during secondary coal charging, and the generation and emission of sulfur dioxide are reduced from the source; the combustible substance is hydrogen, carbon monoxide, coke oven gas after fine desulfurization treatment, or other solid combustible substances or combustible gases without sulfur content.
2. The coal charging process for source emission reduction of sulfur dioxide as claimed in claim 1, wherein after oxygen in the carbonization chamber is consumed by combustible substances, a high-pressure ammonia water injection device corresponding to the carbonization chamber in the gas collection and purification system is started, and flue gas generated after combustion of the combustible substances and the oxygen is introduced into the gas collection and purification system.
3. The coal charging process for source emission reduction of sulfur dioxide as claimed in claim 1, comprising the following steps:
1) before the operation of charging coal into a carbonization chamber of a top charging coke oven is started, a coal charging smoke dust collecting device at the top of the oven is firstly communicated with a coal charging port at the top of the carbonization chamber;
2) adjusting a fan of a coal-charging dust removal system from a low speed to a medium-high speed, wherein the low speed is 20% -30% of the rated rotating speed of the fan, and the medium-high speed is 60% -100% of the rated rotating speed of the fan; simultaneously starting a high-pressure ammonia water injection device in the coal gas collecting and purifying system, which corresponds to the carbonization chamber;
3) introducing combustible substances into the carbonization chamber, and consuming oxygen in the carbonization chamber by utilizing the combustible substances to perform combustion reaction with oxygen in the carbonization chamber;
4) introducing flue gas generated after combustible substances and oxygen are combusted into a coal gas collecting and purifying system by using a high-pressure ammonia water injection device; simultaneously, the high-speed operation of a fan of the coal charging and dust removing system is kept, and the residual flue gas in the carbonization chamber is sent into a dust removing device through a coal charging and dust removing pipeline and is discharged after being purified;
5) the introduction of combustible material into the carbonization chamber is stopped and the coal charging operation is started.
4. The coal charging process for source emission reduction of sulfur dioxide as claimed in claim 1, comprising the following steps:
1) before the operation of charging coal into a carbonization chamber of a top charging coke oven is started, a coal charging smoke dust collecting device at the top of the oven is firstly communicated with a coal charging port at the top of the carbonization chamber;
2) adjusting a fan of the coal charging and dust removing system from a low speed to a medium-high speed;
3) introducing combustible substances into the carbonization chamber, and consuming oxygen in the carbonization chamber by utilizing the combustion reaction of the combustible substances and oxygen in the carbonization chamber;
4) the high-speed operation in a fan of the coal charging and dust removing system is kept, and the flue gas generated after the combustible substances and the oxygen are combusted is sent into a dust removing device through a coal charging and dust removing pipeline and is discharged after being purified;
6) and stopping introducing the combustible substances into the carbonization chamber, starting a high-pressure ammonia water injection facility corresponding to the carbonization chamber in the gas collection and purification system, and starting the coal charging operation.
5. The coal charging process for source emission reduction of sulfur dioxide as claimed in claim 1 or 2, wherein the carbonization chamber is provided with an inlet for introducing combustible materials, and the combustible materials are hydrogen, carbon monoxide, coke oven gas after fine desulfurization treatment, or other solid combustible materials or combustible gases without sulfur content.
6. The coal charging process for source emission reduction of sulfur dioxide as claimed in claim 1 or 2, wherein the combustible material is introduced into the carbonization chamber at a moment before coal charging operation of the carbonization chamber after furnace doors at two sides of the carbonization chamber to be charged with coal are closed.
7. The coal charging process for reducing the emission of sulfur dioxide from sources according to claim 3 or 4, wherein the operation of connecting the coal charging smoke dust collecting device at the top of the furnace with the coal charging port at the top of the carbonization chamber is performed 1-5 min before the charging operation is started.
8. The coal charging process for reducing the emission of sulfur dioxide from a source as claimed in claim 3 or 4, wherein the fan of the coal charging and dust removing system is adjusted from low speed to medium-high speed, and is started at least 5s before the operation of introducing combustible materials into the carbonization chamber.
9. The coal charging process for source emission reduction of sulfur dioxide as claimed in claim 3, wherein the operation of the high pressure ammonia water injection device corresponding to the carbonization chamber in the gas collection and purification system is started, and is started at least 5s before the operation of introducing the combustible material into the carbonization chamber.
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