CN210193748U - Clean coking production system - Google Patents
Clean coking production system Download PDFInfo
- Publication number
- CN210193748U CN210193748U CN201920773824.0U CN201920773824U CN210193748U CN 210193748 U CN210193748 U CN 210193748U CN 201920773824 U CN201920773824 U CN 201920773824U CN 210193748 U CN210193748 U CN 210193748U
- Authority
- CN
- China
- Prior art keywords
- coke oven
- gas
- flue gas
- hydrogen
- coal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Abstract
The utility model relates to a clean coking production system, collect and clean system, coal gas hydrogen extraction system, coke oven flue gas pretreatment system and coke oven flue gas CO including coke oven heating system, coal high temperature dry distillation system, coal gas2An absorbent system. The utility model discloses integrate multiple technology in the coking system, effectively reduce or avoid coking production in-process atmospheric pollutants's formation, produce clean energy product, improve coking production waste gas's resource utilization level, reduce coking production process greenhouse gas's emission, found the green production technology of coking.
Description
Technical Field
The utility model relates to a coal coking technical field especially relates to a clean coking production system that can reduce pollutant discharge.
Background
Coking is a process of converting coal suitable for coking into coke and coal gas through high-temperature dry distillation. At present, the coking equipment which is most widely applied in the field of coal coking is a mechanized heat storage type coke oven, and a mode that a coking chamber and a combustion chamber are adjacently arranged at intervals is adopted. In the combustion chamber, the fuel gas (coke oven gas or other types of fuel gas) for heating the coke oven is mixed with air to generate combustion reaction, and simultaneously, a large amount of heat is released. The heat generated by combustion is transferred to the coal material in the carbonization chamber through the furnace wall between the combustion chamber and the carbonization chamber, the coal material is dry distilled into coke in the carbonization chamber under the continuous high-temperature heat supply effect, and meanwhile, the volatile components in the coal material form raw coke gas under the high-temperature effect. The raw gas obtained by dry distillation of the coal material in the carbonization chamber is cooled by circulating ammonia water when passing through an ascending pipe and a bridge pipe at the top of the coke oven, meanwhile, components such as tar in the raw gas are condensed and then separated from the gas, and the components are collected by a coke oven gas collecting pipe and guided into a gas purification system, in the gas purification system, the impurities such as tar, ammonia, benzene, sulfur and the like in the gas and valuable components in the impurities are effectively separated, and various chemical products with high added values are formed by processing through corresponding processing production processes.
For the coking production of the steel and iron combined enterprise, in the process, blast furnace gas (also called lean gas) from the blast furnace production process and less blast furnace gas are generally adopted for heating the coke ovenThe mixed gas mixed with the coke oven gas treated by the gas purification system is combusted with air to provide heat energy for coke oven production. For an independent coking production enterprise, purified coke oven gas (also called rich gas) produced by a coke oven and air are generally combusted to provide heat energy for the production of the coke oven. No matter the mixed gas heating or the coke oven gas heating is used, the combustion reaction is carried out in the combustion chamber to release heat, and simultaneously, the carbon-containing component in the gas can generate CO after being combusted2Under high temperature condition, nitrogen in air can be oxidized to generate NOx, and sulfide in coal gas can be oxidized to generate SO2CO formed after these combustions2NOx and SO2The waste gas enters a small flue, a branch flue and a main flue of the coke oven in sequence along with the combustion waste gas, and is finally discharged into the atmosphere through a coke oven chimney.
In the exhaust gases from coke ovens, NOx and SO2The pollutants are pollutants having a pollution effect on the atmosphere, and along with the increasing strictness of environmental protection policies and relevant laws and regulations, harmful substances must be removed from waste gas as far as possible, and a coke oven flue gas desulfurization and denitrification system is generally adopted to purify coke oven flue gas. And CO in the exhaust gas2Is recognized as a greenhouse gas, and the emission of a large amount of the greenhouse gas into the atmosphere is an important factor causing the temperature on the earth surface to rise, causing natural disasters such as glacier ablation, sea level rise, hurricane, flood, drought and the like, thereby controlling CO2Emissions are becoming increasingly concerned by countries around the world and various international organizations.
In the current coking production process, NOx and SO generated in the coke oven heating process are treated2Can carry out purification treatment to the coke oven flue gas through setting up SOx/NOx control system, nevertheless SOx/NOx control system's construction and operation need coking production enterprise to constantly input more expense and energy. For CO in coke oven exhaust gas2There are no emission abatement measures that can be effectively implemented to date.
Taking a coking production facility with a coke production capacity of 100 ten thousand tons/year as an example, roughly calculated, if mixed gas heating is adopted, about 50 ten thousand tons of CO are generated each year2The annual coke yield of the steel and iron united enterprises in China is only about 12 hundred million tons of data, 0.6 million tons of CO are discharged to the atmosphere every year in the coking production of the iron and steel combination enterprises in China2。
Therefore, in order to protect the environment in which human beings rely on living and reduce the pollution of coking production enterprises to the atmosphere, the coking production process needs to be continuously improved and a clean and environment-friendly coking process needs to be developed.
Disclosure of Invention
The utility model provides a clean coking production system integrates multiple technology in the coking system, effectively reduces or avoids the generation of atmospheric pollutants in the coking production process, produces clean energy product, improves the utilization level of coking waste gas, reduces coking production process greenhouse gas's emission, founds the green production technology of coking.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a clean coking production system comprises a coke oven heating system, a coal high-temperature carbonization system, a coal gas collecting and purifying system, a coal gas hydrogen extraction system, a coke oven flue gas pretreatment system and coke oven flue gas CO2An absorption system; the coke oven heating system consists of a combustion-supporting gas supply unit, a fuel gas supply unit, a regenerative chamber and a combustion chamber; the combustion-supporting gas supply unit is connected with the corresponding regenerative chambers through pure oxygen conveying pipelines, the gas supply unit is connected with the corresponding regenerative chambers through hydrogen-extracted coke oven gas conveying pipelines, and the 2 regenerative chambers are respectively connected with a combustion-supporting gas inlet and a gas inlet of the combustion chamber; the combustion chamber is arranged adjacent to the coal high-temperature dry distillation system, and a partition wall is arranged between the combustion chamber and the coal high-temperature dry distillation system; a coke oven gas outlet of the coal high-temperature dry distillation system is connected with a gas collecting and purifying system through a coke oven gas conveying pipeline, and the gas collecting and purifying system is connected with a gas hydrogen stripping system through a purified coke oven gas conveying pipeline; the hydrogen extraction system is provided with a hydrogen outlet and a hydrogen extraction coke oven gas outlet, and the hydrogen extraction coke oven gas outlet is respectively connected with a fuel gas supply unit of the coke oven heating system and an external coke oven gas supply pipeline; the main flue of the coke oven heating system is connected with a coke oven flue gas pretreatment system, and the coke oven flue gas pretreatment system is provided with a flue gas desulfurization system and a flue gas waste heat recovery system; pretreatment system for coke oven flue gasThe treated coke oven flue gas pipeline is connected with coke oven flue gas CO2Absorption system, coke oven flue gas CO2The absorption system is provided with an alkaline absorption liquid inlet, a purified flue gas discharge port and a carbonate solution outlet, and the carbonate solution outlet is respectively connected with a desulfurization liquid inlet of a flue gas desulfurization system in the coke oven flue gas pretreatment system and a carbonate product delivery pipeline.
The coke oven flue gas pretreatment system comprises a flue gas desulfurization system and a flue gas waste heat recovery system.
Compared with the prior art, the beneficial effects of the utility model are that:
1) producing clean energy;
the coke oven gas generated by high-temperature dry distillation of coal is rich in H2And H is2H has been receiving increasing attention as a clean energy source2The preparation of the hydrogen energy source becomes an insurmountable premise of the hydrogen energy utilization industry; the coking production is a high-efficiency conversion and utilization process of coal resources, and the extraction of hydrogen in the byproduct coke oven gas can greatly reduce the cost of hydrogen preparation in the hydrogen energy utilization industry while producing raw coke necessary for the steel industry, so that the coking production becomes an important hydrogen source for the hydrogen energy industry; therefore, the process of the utility model is adopted to extract the hydrogen in the coke oven gas, which can widen the development path of the coking industry and tamp the foundation of the coal coking industry;
2) the source emission reduction of NOx is realized;
the coke oven heating system adopts pure oxygen combustion, so that the generation of NOx is reduced or even avoided, and the emission reduction of pollutants is realized from the source of coking production; meanwhile, because pure oxygen is adopted instead of air which is conventionally used by the existing coke oven heating system as combustion-supporting gas, a large amount of N in waste gas after combustion is avoided2The coke oven heating system has the advantages that the volume of the coke oven smoke is obviously reduced, the effective energy loss caused by the discharge of a large amount of heat-carrying waste gas is avoided, the energy utilization efficiency of the coke oven heating system is obviously improved, and the energy conservation is realized from the source;
3) producing high calorific value gas;
after the purified coke oven gas is subjected to hydrogen extraction, the heat value of the residual coke oven gas is improved by nearly 60 percent, and the combustion efficiency and the energy utilization efficiency can be obviously improved no matter the purified coke oven gas is used for heating a coke oven or used as fuel gas of other systems; the increase of the heat value is accompanied with the sudden decrease of the volume of the fuel gas, so that pipelines used for delivering the fuel gas are reduced, and the delivery of the fuel gas is more convenient;
4) realization of CO2Emission reduction and resource utilization;
after the coke oven heating system adopts pure oxygen combustion, the main component of the generated coke oven smoke is CO2And H2O, the two accounts for about 96 percent of the total amount of the coke oven smoke; by coke oven flue gas CO2An absorption system for absorbing CO in the coke oven flue gas2And H2O is absorbed and captured at the same time, and the pollution of the emission of the residual gas to the environment is reduced to the minimum; and CO2Industrial and agricultural products with certain value can be formed after adsorption treatment, and CO is realized2The recycling and resource utilization of the composite material have positive promotion significance for environmental protection.
Drawings
FIG. 1 is a schematic diagram of a clean coking production system according to the present invention.
FIG. 2 is a schematic structural diagram of a coke oven heating system according to the present invention.
Fig. 3 is a process flow diagram of example 1 of the present invention.
Fig. 4 is a process flow diagram of example 2 of the present invention.
Fig. 5 is a process flow diagram of example 3 of the present invention.
In the figure: 1. the system comprises a coke oven heating system 11, a combustion-supporting gas supply unit 12, a fuel gas supply unit 13, a combustion chamber 14, a heat storage chamber 2, a coal high-temperature carbonization system 3, a coal gas collecting and purifying system 4, a coal gas hydrogen extraction system 5, a coke oven flue gas pretreatment system 51, a flue gas desulfurization system 52, a flue gas waste heat recovery system 6, coke oven flue gas CO2Absorption system
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1, the utility model relates to a cleanerThe clean coking production system comprises a coke oven heating system 1, a coal high-temperature dry distillation system 2, a coal gas collecting and purifying system 3, a coal gas hydrogen extraction system 4, a coke oven flue gas pretreatment system 5 and coke oven flue gas CO2An absorption system 6; the coke oven heating system 1 consists of a combustion-supporting gas supply unit 11, a fuel gas supply unit 12, a regenerative chamber 14 and a combustion chamber 13; the combustion-supporting gas supply unit 11 is connected with the corresponding regenerative chambers 14 through pure oxygen conveying pipelines, the gas supply unit 12 is connected with the corresponding regenerative chambers 14 through hydrogen-extracted coke oven gas conveying pipelines, and 2 regenerative chambers 14 are respectively connected with combustion-supporting gas inlets and gas inlets of the combustion chambers 13; the combustion chamber 13 is arranged adjacent to the coal high-temperature dry distillation system 2, and a partition wall is arranged between the combustion chamber and the coal high-temperature dry distillation system; a coke oven gas outlet of the coal high-temperature dry distillation system 2 is connected with a gas collecting and purifying system 3 through a coke oven gas conveying pipeline, and the gas collecting and purifying system 3 is connected with a coal gas hydrogen stripping system 4 through a purified coke oven gas conveying pipeline; the coal gas hydrogen stripping system 4 is provided with a hydrogen outlet and a hydrogen-extracted coke oven gas outlet, and the hydrogen-extracted coke oven gas outlet is respectively connected with a fuel gas supply unit 12 of the coke oven heating system 1 and an external coke oven gas supply pipeline; the main flue of the coke oven heating system 1 is connected with a coke oven flue gas pretreatment system 5, and the coke oven flue gas pretreatment system 5 is provided with a flue gas desulfurization system 51 and a flue gas waste heat recovery system 52; the coke oven flue gas pretreatment system 5 is connected with coke oven flue gas CO through a pretreated coke oven flue gas pipeline2Absorption system 6, coke oven flue gas CO2The absorption system 6 is provided with an alkaline absorption liquid inlet, a purified flue gas discharge port and a carbonate solution outlet, and the carbonate solution outlet is respectively connected with a desulfurization liquid inlet of a flue gas desulfurization system 51 in the coke oven flue gas pretreatment system 5 and a carbonate product delivery pipeline.
The technical process of the clean coking production system is as follows:
1) in the coke oven heating system 1, pure oxygen is adopted as combustion-supporting gas to participate in the heating process of the coke oven; the coke oven heating system 1 adopts the coke oven to produce the coke oven which contains CH after being purified and hydrogen extracted4CO and other hydrocarbon coke oven gas are used as fuel gas, oxygen and the coke oven gas are fully combusted and release heat in a combustion chamber 13 of a coke oven heating system 1, and the coal material in a carbonization chamber in a coal high-temperature dry distillation system 2 is subjected to carbonizationHeating and dry distilling;
2) the main component of the coke oven smoke generated after the combustion of the coke oven heating system 1 is CO2、H2O and small amount of SO2The coke oven flue gas is discharged from the coke oven heating system 1, collected by a small flue, a branch flue and a main flue and then enters a coke oven flue gas pretreatment system 5; in the coke oven flue gas pretreatment system 5, the coke oven flue gas is desulfurized and the waste heat is recovered;
3) introducing the pretreated coke oven flue gas into CO2Absorption system 6, CO in Coke oven flue gas2Fully contacts with alkaline absorption liquid and is absorbed to generate corresponding carbonate substances, thereby removing CO in the coke oven smoke2Realizing the coking production process CO2The water vapor in the coke oven flue gas is condensed and recovered by the solution; the carbonate substance is used as a medium for coke oven flue gas desulfurization, or is used as a carbonate product after crystallization and purification;
4) in the coal high-temperature dry distillation system 2, the coal material in the carbonization chamber is subjected to high-temperature dry distillation to generate coke oven gas, and the coke oven gas enters a gas collecting and purifying system 3 through an ascending pipe and a bridge pipe; in the gas collecting and purifying system 3, the coke oven gas is cooled and purified to remove impurities therein, so as to obtain corresponding tar, ammonia water, benzene products and byproducts, and the purified coke oven gas enters a gas hydrogen stripping system 4;
5) in the coal gas hydrogen extraction system 4, hydrogen in the coke oven gas is separated, and the separated hydrogen is sent to a subsequent hydrogen storage and external supply system to be used as product external supply or external sales; the coke oven gas after hydrogen extraction is mainly hydrocarbon, and the heat value reaches 28000kJ/m3In the above, a part of the coke oven gas is sent to the coke oven heating system 1 to be used as fuel gas, and the rest of the coke oven gas is used as fuel for external supply.
The coal gas hydrogen stripping system 4 adopts a pressure swing adsorption gas separation process to separate hydrogen from other gas components in the coke oven gas.
The coke oven flue gas pretreatment system 5 comprises a flue gas desulfurization system and a 51 flue gas waste heat recovery system 52; according to the type of the configured flue gas desulfurization system, a process of flue gas desulfurization and flue gas waste heat recovery, which is to perform flue gas desulfurization firstly and then perform flue gas waste heat recovery, or a process of flue gas waste heat recovery and flue gas desulfurization, which is to perform flue gas waste heat recovery firstly and then perform flue gas desulfurization, is adopted.
The alkaline absorption liquid is NaOH solution and is used for absorbing CO in the flue gas2After generation of NaHCO3One part of the solution is conveyed to a sodium-based semi-dry coke oven flue gas desulfurization system to be used as desulfurization solution, and the other part of the solution is crystallized and dried to be used as a sodium-based dry flue gas desulfurizer or purified to be used as NaHCO3And (5) products are sold outside.
The alkaline absorption liquid is Ca (OH)2Solution, absorbing CO in flue gas2After-formation of CaCO3Precipitate or Ca (HCO)3)2An aqueous solution.
The alkaline absorption liquid is ammonia water and CO in the flue gas2NH is generated after full contact in the reactor4HCO3After crystallization and drying, the product is sold as a fertilizer product.
The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.
[ example 1 ]
As shown in figures 1 to 3, in the embodiment, a clean coking production system comprises a coke oven heating system 1, a coal high-temperature carbonization system 2, a gas collecting and purifying system 3, a gas hydrogen extracting system 4, a coke oven flue gas pretreatment system 5 and coke oven flue gas CO2An absorption system 6.
In this embodiment, the coke oven heating system 1 includes a combustion-supporting gas supply unit 11, a fuel gas supply unit 12, a combustion chamber 13, and a regenerator 14, the combustion-supporting gas is pure oxygen, and the fuel gas is from the coal gas hydrogen stripping system 4 and is coke oven gas from which hydrogen has been separated.
In this embodiment, the regenerator 14 can accumulate more heat energy of the exhaust gas generated by combustion by improving the heat storage capacity, reduce the heat carried by the exhaust gas, and improve the utilization efficiency of the energy in the production process of the coke oven.
In this embodiment, the coal gas hydrogen stripping system 4 is disposed behind the coal gas collecting and purifying system 3, and a pressure swing adsorption gas separation process is adopted to separate hydrogen from other gas components in the coke oven gas, so that the obtained hydrogen is used as a product external supply or an external pin, and provides a required hydrogen source for a hydrogen energy utilization facility or is used for other purposes.
In this embodiment, the coke oven flue gas pretreatment system 5 includes a flue gas desulfurization system 51 and a flue gas waste heat recovery system 52.
In this embodiment, the coke oven flue gas CO2The absorption system 6 is arranged behind the coke oven flue gas pretreatment system 5 and adopts alkaline absorption liquid to absorb CO in the coke oven flue gas2Chemical absorption is carried out, and condensation and recovery of water vapor in the flue gas are realized.
In this embodiment, the working flow of a clean coking production process is as follows:
in the coke oven heating system 1, pure oxygen is adopted as combustion-supporting gas to participate in the heating process of the coke oven. The pure oxygen can be connected to the coke oven heating system 1 by pipelines from oxygen plants or dedicated air separation facilities dedicated to the manufacturing facility. The coke oven heating adopts the residual CH containing gas produced by the coke oven per se after gas purification and gas hydrogen extraction4And CO and other hydrocarbons in the combustion chamber 13 of the coke oven heating system 1, the oxygen and the coke oven gas are fully combusted to release a large amount of heat, and the coal in the carbonization chamber is heated through the combustion chamber 13 and the partition wall of the carbonization chamber. The main component of the waste gas generated after combustion is CO2And H2O and small amount of SO2And the waste gas is discharged from the coke oven heating system 1, collected through the small flue, the branch flue and the main flue, and enters the coke oven flue gas pretreatment system 5. After flue gas desulfurization and waste heat recovery, the flue gas enters CO2An absorption system 6.
In CO2CO in the flue gas in the absorption system 62Is absorbed by fully contacting with alkaline absorption liquid, thereby removing CO in the flue gas2Realizing the coking production process CO2The water vapor in the flue gas is condensed and recovered by the solution, so that the main components of the coke oven flue gas are obtainedAnd (5) recycling and harmless treatment.
In this embodiment, the alkaline absorption liquid is prepared from NaOH and water, and the amount of NaOH is in accordance with the CO in the flue gas2The content is added in equal mole number, and CO is added in the coke oven flue gas2In the absorption system 6, the coke oven smoke is fully contacted with the prepared NaOH aqueous solution, and CO in the smoke is fully absorbed2Reacting with NaOH to generate NaHCO3. The resulting NaHCO3One part of the solution can be used as a desulfurizing liquid of a sodium-based semi-dry coke oven flue gas desulfurization system and is sent into a flue gas desulfurization system 51 through a pipeline to remove SO in the flue gas2The generated desulfurization by-products are collected by a cloth bag dust collector in a desulfurization system and then further processed, and CO generated after desulfurization reaction2Returns to the coke oven flue gas again and enters the subsequent flue gas waste heat recovery system 52 and coke oven flue gas CO again along with the coke oven flue gas2The treatment is carried out in the absorption system 6. NaHCO 23The rest part of the solution can be used as the sodium-based dry flue gas desulfurizer or can be sold outside products after being crystallized and dried.
In the coal high-temperature dry distillation system 2, the coal material in the carbonization chamber is subjected to high-temperature dry distillation under the action of the coke oven heating system 1 to generate coke oven gas, and the coke oven gas in the carbonization chamber enters the gas collecting and purifying system 3 after passing through the ascending pipe and the bridge pipe. In the gas collecting and purifying system 3, the coke oven gas is cooled and purified to remove impurities therein, so as to obtain corresponding products and byproducts such as tar, ammonia water, benzene and the like, and finally the coke oven gas enters a gas hydrogen stripping system 4. In the gas hydrogen extraction system 4, hydrogen in the coke oven gas is effectively separated from the coke oven gas, and the separated hydrogen is sent to a subsequent hydrogen storage and external supply system to be used as product external supply or external sales. The residual coke oven gas after hydrogen extraction is mainly hydrocarbon, and the heat value can reach 28000kJ/m3One part of the coke oven gas is sent to the coke oven heating system 1 to be used as fuel gas, and the rest coke oven gas can be sent to other gas comprehensive utilization processes or used as fuel for external supply.
[ example 2 ]
As shown in FIGS. 1, 2 and 4, in the present embodiment, a clean coking production system comprises a coke oven heating system 1,A coal high-temperature carbonization system 2, a coal gas collecting and purifying system 3, a coal gas hydrogen extraction system 4, a coke oven flue gas pretreatment system 5 and coke oven flue gas CO2An absorption system 6.
In this embodiment, the coke oven heating system includes a combustion-supporting gas supply unit 11, a fuel gas supply unit 12, a combustion chamber 13, a regenerator 14, and the like, where the combustion-supporting gas is pure oxygen, and the fuel gas is coke oven gas from the coal gas hydrogen stripping system from which hydrogen has been separated.
The coal gas hydrogen stripping system 4 is arranged behind the coal gas collecting and purifying system 3, hydrogen in the coke oven gas is separated from other gas components by adopting a pressure swing adsorption gas separation process, and the obtained hydrogen is used as a product external supply or an external pin to provide a needed hydrogen source for a hydrogen energy utilization facility or be used for other purposes.
The coke oven flue gas pretreatment system 5 comprises an active coke flue gas desulfurization system 51 and a flue gas waste heat recovery system 52.
The coke oven flue gas CO2An absorption system 6 arranged behind the coke oven flue gas pretreatment system 5 and used for absorbing CO in the coke oven flue gas by adopting alkaline absorption liquid2Chemical absorption is carried out, and condensation and recovery of water vapor in the flue gas are realized.
In this embodiment, a clean coking production process comprises the following steps:
in the coke oven heating system 1, pure oxygen is adopted as combustion-supporting gas to participate in the heating process of the coke oven. The pure oxygen can be connected to the coke oven heating system 1 by pipelines from oxygen plants or dedicated air separation facilities dedicated to the manufacturing facility. The coke oven heating adopts the residual CH containing gas produced by the coke oven per se after gas purification and gas hydrogen extraction4And CO and other hydrocarbons in the combustion chamber 13 of the coke oven heating system 1, the oxygen and the coke oven gas are fully combusted to release a large amount of heat, and the coal in the carbonization chamber is heated through the combustion chamber 13 and the partition wall of the carbonization chamber. The main component of the waste gas generated after combustion is CO2And H2O and small amount of SO2And the waste gas is discharged from the coke oven heating system 1, collected through the small flue, the branch flue and the main flue, and enters the coke oven flue gas pretreatment system 5. In the coke oven flue gas pretreatment system 5The flue gas firstly passes through the flue gas waste heat recovery system 52, the heat carried by the flue gas is recovered and converted into steam or high-temperature water which can be effectively utilized, the cooled flue gas then enters the active coke flue gas desulfurization system 51, and SO in the flue gas2Adsorbing and capturing by active coke, and removing SO2The flue gas enters into CO2An absorption system 6.
In CO2CO in the flue gas in the absorption system 62Fully contacts with the alkaline absorption liquid and is absorbed by the alkaline absorption liquid. The alkaline absorption liquid is prepared from CaO and water, wherein the amount of CaO is in accordance with the amount of CO in the flue gas2Adding the required amount of the content reaction into the coke oven flue gas CO2In the absorption system 6, coke oven flue gas and Ca (OH) prepared2The aqueous solution is fully contacted with CO in the flue gas2And Ca (OH)2Reaction to produce CaCO3Precipitate or Ca (HCO)3)2Solution to remove CO from flue gas2Realizing the coking production process CO2The emission reduction is realized, and meanwhile, the water vapor in the flue gas is also condensed and recovered by the solution, so that the main components of the coke oven flue gas are subjected to harmless treatment.
In the coal high-temperature dry distillation system 2, the coal material in the carbonization chamber is subjected to high-temperature dry distillation under the action of the coke oven heating system 1 to generate coke oven gas, and the coke oven gas in the carbonization chamber enters the gas collecting and purifying system 3 after passing through the ascending pipe and the bridge pipe. In the gas collecting and purifying system 3, the coke oven gas is cooled and purified to remove impurities therein, so as to obtain corresponding products and byproducts such as tar, ammonia water, benzene and the like, and finally the coke oven gas enters a gas hydrogen stripping system 4. In the gas hydrogen extraction system 4, hydrogen in the coke oven gas is effectively separated from the coke oven gas, and the separated hydrogen is sent to a subsequent hydrogen storage and external supply system to be used as product external supply or external sales. The residual gas after the hydrogen stripping of the coke oven gas is mainly hydrocarbon, and the heat value can reach 28000kJ/m3One part of the coke oven gas is sent to the coke oven heating system 1 to be used as fuel gas, and the rest coke oven gas can be sent to other gas comprehensive utilization processes or used as fuel for external supply.
[ example 3 ]
As shown in figure 1 and figure2 and 5, in the embodiment, the clean coking production system comprises a coke oven heating system 1, a coal high-temperature dry distillation system 2, a coal gas collecting and purifying system 3, a coal gas hydrogen extraction system 4, a coke oven flue gas pretreatment system 5 and coke oven flue gas CO2An absorption system 6.
The coke oven heating system comprises a combustion-supporting gas supply unit 11, a fuel gas supply unit 12, a combustion chamber 13, a heat storage chamber 14 and the like, wherein the combustion-supporting gas is pure oxygen, and the fuel gas is coke oven gas from which hydrogen is separated by the coal gas hydrogen stripping system.
The coal gas hydrogen stripping system 4 is arranged behind the coal gas collecting and purifying system 3, hydrogen in the coke oven gas is separated from other gas components by adopting a pressure swing adsorption gas separation process, and the obtained hydrogen is used as a product external supply or an external pin to provide a needed hydrogen source for a hydrogen energy utilization facility or be used for other purposes.
The coke oven flue gas pretreatment system 5 comprises an active coke flue gas desulfurization system 51 and a flue gas waste heat recovery system 52.
The coke oven flue gas CO2An absorption system 6 arranged behind the coke oven flue gas pretreatment system 5 and used for absorbing CO in the coke oven flue gas by adopting alkaline absorption liquid2Chemical absorption is carried out, and condensation and recovery of water vapor in the flue gas are realized.
In this embodiment, the working flow of a clean coking production process is as follows:
in the coke oven heating system 1, pure oxygen is adopted as combustion-supporting gas to participate in the heating process of the coke oven. The pure oxygen can be connected to the coke oven heating system 1 by pipelines from oxygen plants or dedicated air separation facilities dedicated to the manufacturing facility. The coke oven heating adopts the residual CH containing gas produced by the coke oven per se after gas purification and gas hydrogen extraction4And CO and other hydrocarbons in the combustion chamber 13 of the coke oven heating system 1, the oxygen and the coke oven gas are fully combusted to release a large amount of heat, and the coal in the carbonization chamber is heated through the combustion chamber 13 and the partition wall of the carbonization chamber. The main component of the waste gas generated after combustion is CO2And H2O and small amount of SO2The waste gas is discharged from the coke oven heating system 1 and then is collected through a small flue, a branch flue and a main flue,enters a coke oven flue gas pretreatment system 5. In the coke oven flue gas pretreatment system 5, the flue gas firstly passes through a flue gas waste heat recovery system 52, heat carried by the flue gas is recovered and converted into steam or high-temperature water which can be effectively utilized, the cooled flue gas then enters an active coke flue gas desulfurization system 51, and SO in the flue gas2Adsorbing and capturing by active coke, and removing SO2The flue gas enters into CO2An absorption system 6.
In CO2CO in the flue gas in the absorption system 62Fully contacts with the alkaline absorption liquid and is absorbed by the alkaline absorption liquid. The ammonia water obtained by an ammonia distillation system in the coking production process of the alkaline absorption liquid is the CO in the coke oven flue gas2In the absorption system 6, the coke oven flue gas is fully contacted with ammonia water, and CO in the flue gas2Reacting with ammonia water to generate NH4HCO3Thereby removing CO in the flue gas2Realizing the coking production process CO2The emission reduction is realized, and meanwhile, the water vapor in the flue gas is also condensed and recovered by the solution, so that the main components of the coke oven flue gas are subjected to harmless treatment. Generated NH4HCO3After crystallization, drying and other treatments, the product can be used as a fertilizer for agricultural production to provide necessary CO for crop growth2And nitrogen fertilizers.
In the coal high-temperature dry distillation system 2, the coal material in the carbonization chamber is subjected to high-temperature dry distillation under the action of the coke oven heating system 1 to generate coke oven gas, and the coke oven gas in the carbonization chamber enters the gas collecting and purifying system 3 after passing through the ascending pipe and the bridge pipe. In the gas collecting and purifying system 3, the coke oven gas is cooled and purified to remove impurities therein, so as to obtain corresponding products and byproducts such as tar, ammonia water, benzene and the like, and finally the coke oven gas enters a gas hydrogen stripping system 4. In the gas hydrogen extraction system 4, hydrogen in the coke oven gas is effectively separated from the coke oven gas, and the separated hydrogen is sent to a subsequent hydrogen storage and external supply system to be used as product external supply or external sales. The residual coke oven gas after hydrogen extraction is mainly hydrocarbon, and the heat value can reach 28000kJ/m3One part of the coke oven gas is sent to the coke oven heating system 1 to be used as fuel gas, and the rest coke oven gas can be sent to other gas comprehensive utilization processes or used as fuel for external supply.
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 (2)
1. A clean coking production system is characterized by comprising a coke oven heating system, a coal high-temperature carbonization system, a coal gas collecting and purifying system, a coal gas hydrogen extraction system, a coke oven flue gas pretreatment system and coke oven flue gas CO2An absorption system; the coke oven heating system consists of a combustion-supporting gas supply unit, a fuel gas supply unit, a regenerative chamber and a combustion chamber; the combustion-supporting gas supply unit is connected with the corresponding regenerative chambers through pure oxygen conveying pipelines, the gas supply unit is connected with the corresponding regenerative chambers through hydrogen-extracted coke oven gas conveying pipelines, and the 2 regenerative chambers are respectively connected with a combustion-supporting gas inlet and a gas inlet of the combustion chamber; a high-temperature flue gas outlet of the combustion chamber is connected with a coal high-temperature carbonization system through a high-temperature flue gas conveying pipeline; a coke oven gas outlet of the coal high-temperature dry distillation system is connected with a gas collecting and purifying system through a coke oven gas conveying pipeline, and the gas collecting and purifying system is connected with a gas hydrogen stripping system through a purified coke oven gas conveying pipeline; the hydrogen extraction system is provided with a hydrogen outlet and a hydrogen extraction coke oven gas outlet, and the hydrogen extraction coke oven gas outlet is respectively connected with a fuel gas supply unit of the coke oven heating system and an external coke oven gas supply pipeline; the main flue of the coke oven heating system is connected with a coke oven flue gas pretreatment system, and the coke oven flue gas pretreatment system is provided with a flue gas desulfurization system and a flue gas waste heat recovery system; the coke oven flue gas pretreatment system is connected with coke oven flue gas CO through a pretreated coke oven flue gas pipeline2Absorption system, coke oven flue gas CO2The absorption system is provided with an alkaline absorption liquid inlet, a purified flue gas discharge port and a carbonate solution outlet, and the carbonate solution outlet is respectively connected with a desulfurization liquid inlet of a flue gas desulfurization system in the coke oven flue gas pretreatment system and a carbonate product delivery pipeline.
2. The clean coking production system of claim 1 in which the coke oven flue gas pretreatment system includes a flue gas desulfurization system and a flue gas waste heat recovery system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920773824.0U CN210193748U (en) | 2019-05-27 | 2019-05-27 | Clean coking production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920773824.0U CN210193748U (en) | 2019-05-27 | 2019-05-27 | Clean coking production system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210193748U true CN210193748U (en) | 2020-03-27 |
Family
ID=69876241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920773824.0U Active CN210193748U (en) | 2019-05-27 | 2019-05-27 | Clean coking production system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210193748U (en) |
-
2019
- 2019-05-27 CN CN201920773824.0U patent/CN210193748U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105214478A (en) | The integral process of a kind of coke oven flue exhuast gas desulfurization denitration and waste heat recovery | |
| CN104689679B (en) | Desulfurization and denitrification process for coke oven flue gas | |
| CN113237337B (en) | Cement production carbon capture device and process with waste co-processing | |
| CN110508057A (en) | Exhaust gas purifying method and system in a kind of lithium battery removal process | |
| CN112377917A (en) | Method for denitration of coal-fired power plant boiler by sludge and coal slime cooperative recycling | |
| CN105169943A (en) | Integrated system for coke oven flue gas desulfurization and denitrification and waste heat recovery | |
| JPS6248527B2 (en) | ||
| CN109482049A (en) | A kind of coke oven flue gas dry desulfurization denitration purification integral process | |
| CN110144228A (en) | A kind of clean coking production technology and system | |
| CN205127750U (en) | Desulphurization of exhaust gas denitration of coke oven flue and waste heat recovery's integrated system | |
| CN109945211A (en) | A kind of incineration treatment method and system of semicoke pyrolysis off-gas waste liquid | |
| CN101743052B (en) | Device and method for reducing CO2-emissions from the waste gases of combustion plants | |
| CN112811983A (en) | System and method for preparing methanol by using sulfur-containing flue gas of boiler | |
| CN101550846B (en) | A chemical looping combustion power generation process and system using landfill gas | |
| CN110452724B (en) | Clean coking process and system | |
| CN204563939U (en) | Coke oven flue gas denitration desulfurization and UTILIZATION OF VESIDUAL HEAT IN integration system | |
| CN210193748U (en) | Clean coking production system | |
| CN210560255U (en) | Clean coking system | |
| CN110141947A (en) | A kind of coke oven flue gas carbon dioxide discharge-reduction technique and system | |
| CN112642275A (en) | Organic waste pyrolysis, gasification, combustion, co-sintering and denitration integrated system and method | |
| CN207951086U (en) | A kind of coke oven flue gas denitration desulfurization and residual neat recovering system | |
| CN216550293U (en) | Vertical square furnace coal gas heat carrier pyrolysis system | |
| CN114409197B (en) | Coke quenching closed type drying water oil ammonia sulfur quality recovery treatment process | |
| CN210186825U (en) | Coke oven flue gas carbon dioxide emission reduction system | |
| CN113120906B (en) | Cement production carbon trapping device and process for treating local calcium circulation coupling waste |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |