WO2017045602A1 - Coke oven flue gas desulfurization and denitrification combined purification process and apparatus - Google Patents
Coke oven flue gas desulfurization and denitrification combined purification process and apparatus Download PDFInfo
- Publication number
- WO2017045602A1 WO2017045602A1 PCT/CN2016/098981 CN2016098981W WO2017045602A1 WO 2017045602 A1 WO2017045602 A1 WO 2017045602A1 CN 2016098981 W CN2016098981 W CN 2016098981W WO 2017045602 A1 WO2017045602 A1 WO 2017045602A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flue gas
- desulfurization
- coke oven
- denitration
- dust removal
- Prior art date
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
- B01D47/08—Spray cleaning with rotary nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8637—Simultaneously removing sulfur oxides and nitrogen oxides
Definitions
- the invention relates to the technical field of coke oven flue gas purification, in particular to a coke oven flue gas desulfurization and denitration combined purification process and device.
- the temperature of the coke oven flue gas is relatively low, generally between 180 °C and 290 °C.
- the SO 2 content in the coke oven flue gas is generally 100-200 mg/Nm 3 .
- the SO in the coke oven flue gas 2 content can reach 350mg/Nm 3 or more.
- the new coking plant, the exhaust gas recirculation technique, heating means segmentation technology can be effectively controlled in the NO X content of ⁇ 500mg / Nm 3; For existing business or special area, can not be met by improving the coke oven heating method NO X emission standards, measures must be taken after the denitration of flue gas.
- the coking method requires that the coke oven chimney must be kept in a hot standby state to ensure the normal and safe production of the coke oven; the temperature of the coke oven flue gas after desulfurization and denitrification purification must be higher than the flue gas dew point temperature, and should not be lower than 130 °C. .
- the conventional SCR denitration method of the power plant directly generates a large amount of ammonium sulfate salt, blocks the catalyst, and the tar in the flue gas.
- the viscous component must adhere to the surface of the catalyst, causing permanent damage and failure to properly denitrify.
- the direct use of the normal temperature wet desulfurization of the power plant will cause the temperature of the coke oven flue gas to fail to meet the emission requirements.
- the low temperature problem can be solved by heating the coke oven flue gas, it will cause energy waste and increase the investment and operating costs. Therefore, it is necessary to develop a desulfurization and denitration purification process and device for coke oven flue gas.
- the invention provides a coke oven flue gas desulfurization and denitration combined purification process and device, and combines rotary spray drying desulfurization with low temperature SCR denitrification to realize high-efficiency desulfurization and denitrification of coke oven flue gas, and the process is simple, accounting for The land area is small and the equipment investment is small.
- the present invention provides a coke oven flue gas desulfurization and denitration combined purification process, comprising the following steps:
- the coke oven flue gas is subjected to rotary spray semi-dry method for low-temperature desulfurization; in the dust removal and denitration system, the particulate matter is subjected to dust removal and filtration; and the selective catalytic reduction method is used for desulfurization and dust removal after low temperature drop.
- the coke oven flue gas is denitrified in the dust removal and denitrification integrated equipment; and the flue gas after denitration is sent back to the coke oven flue and discharged through the coke oven chimney.
- the rotary spray semi-dry method low temperature desulfurization process comprises: the coke oven flue gas is sucked out from the coke oven flue at the root of the coke oven chimney by the induced draft fan, and is transported into the desulfurization through the flue gas pipeline.
- the desulfurization system is composed of a desulfurization tower, a sodium-based desulfurizer solution preparation unit, a circulating ash solution preparation unit, and a solution delivery unit; and in the desulfurization system, a sodium-based desulfurizer that is transported to the desulfurization tower top tank through the solution delivery unit
- the solution is atomized into a sodium-based desulfurizer particle of 50-100 ⁇ m by a nebulizer; the flue gas stream of the coke oven is uniformly distributed in the desulfurization tower through a flue gas distributor at the top of the desulfurization tower, and the sodium-based desulfurizing agent after atomization
- the fine particles are fully reacted in the desulfurization tower to form sodium sulfite and sodium sulfate, thereby removing SO 2 from the flue gas of the coke oven, and the flue gas after desulfurization of the coke oven flue gas enters the dust removal and denitration. system.
- the dust removal and filtration process of the particulate matter comprises: the dust removal and denitration system is provided with a dust removal filter bag, a desulfurization ash collection and transportation device, and the flue gas first enters the filter bag purification function section of the dust removal and denitration integrated device, the flue.
- the dust in the gas is blocked outside the filter bag and adheres to the surface of the filter bag, and the pressure equalization of the filter bag resistance layer causes the flue gas to be evenly distributed on the cross section of the filter layer.
- a preferred solution is to denitrify the coke oven flue gas subjected to low temperature desulfurization and dust removal filtration by a selective catalytic reduction method, including: the filtered flue gas is subjected to a mixed pyrolysis regeneration section and injected. ammonia mixed, and then into functional segments denitration catalyst, NO x in the flue gas is reduced to N 2 in the ammonia catalyst denitration.
- a preferred solution is that the particulate matter in the flue gas filtered by the dust removal and denitration integrated device and the reactant formed by the desulfurization are transported to the circulating ash solution preparation unit through the desulfurization ash collection and conveying device to prepare a circulating ash solution. After that, it is sent to the top tank at the top of the desulfurization tower through the solution conveying unit, and participates in the desulfurization process of the coke oven flue gas, so that the unreacted sodium-based desulfurizing agent is fully utilized.
- the preferred solution is that in the dust removal and denitration system, the ammonia gas is mixed and diluted with the purified flue gas extracted by the ammonia dilution fan in the ammonia gas-flue gas mixer, and then sent to the dust removal and denitration integrated device for denitration. reaction.
- the gas hot blast stove periodically sends the high temperature pyrolysis gas to the mixed pyrolysis regeneration section in the dust removal and denitration integrated equipment to realize in situ pyrolysis regeneration of the denitration catalyst.
- the present invention also provides a coke oven flue gas desulfurization and denitration combined purification device, comprising an air induction system, a desulfurization system and a dust removal and denitration system, wherein the air introduction system is used for attracting and returning the coke oven flue gas,
- the coke oven flue gas circulation purification provides power; the desulfurization system is used to remove SO 2 from the coke oven flue gas; the dust removal and denitration system is used to dedust the flue gas after desulfurization, and then the flue gas after dedusting The gas is subjected to denitration treatment.
- the air intake system includes a flue gas duct, an induced draft fan disposed on the flue gas duct, and a wind electric control valve disposed on the flue gas duct between the coke oven flue and the desulfurization tower, and the setting The air supply electric valve on the flue gas pipeline between the induced draft fan and the coke oven flue; wherein the induced draft fan is equipped with a variable frequency motor or a coupler or a permanent magnet governor, and the air blower is adjusted to adjust the wind
- the electric control valve provides the pressure required for normal operation of the desulfurization system and the dust removal and denitration system.
- the desulfurization system includes a desulfurization tower, a sodium-based desulfurizer solution preparation unit, a circulating ash solution preparation unit, and a solution delivery unit; wherein a coke oven flue gas inlet and an atomizer are disposed at the top of the desulfurization tower.
- the top tank and the flue gas distributor are connected to the atomizer at the liquid outlet of the top tank, and the liquid inlet of the top tank is connected to the sodium-based desulfurizer solution preparation unit and the circulating ash solution preparation unit.
- the sodium-based desulfurizer solution preparation unit includes a sodium-based desulfurizer storage bin, a variable frequency discharge valve, a weighing feeder, a dosing tank, a solution tank, and a heating water tank; and, for preparing a sodium base
- the desulfurizer solution is used for desulfurization of the coke oven flue gas.
- the circulating ash solution preparation unit comprises a desulfurization ash silo, a variable frequency discharge valve, a fixed frequency discharge valve, a weighing feeder, a circulating ash solution tank; and, for preparing the collected desulfurization ash
- the solution is reused after reusing the sodium-based desulfurizing agent therein.
- the solution delivery unit comprises a sodium-based desulfurizer solution pump, a circulating ash solution pump and a solution delivery pipe, a valve; and, for conveying the formulated sodium-based desulfurizer solution and the circulating ash solution to the Top can.
- the dust removal and denitration system comprises an integrated dust removal and denitration device, an ammonia dilution fan, an ammonia gas-flue gas mixer and a desulfurization ash collection and transportation device; and the dust removal and denitration integrated device includes a filter bag purification from bottom to top. Functional section, mixed pyrolysis regeneration section, denitration catalyst functional section;
- the flue gas pipeline drawn from the coke oven flue is connected to the desulfurization tower and the dust removal and denitration integrated equipment in turn; the dust removal and denitration integrated equipment is connected to the induced draft fan; the atomizer at the top of the desulfurization tower is connected with the top tank, and is respectively connected by the solution conveying unit.
- the sodium-based desulfurizer solution preparation unit and the circulating ash solution preparation unit, and the circulating ash solution preparation unit is connected to the bottom ash bin of the dust removal and denitration integrated device through the desulfurization ash collection and transportation device.
- the filter bag purifying functional section includes a ash silo, a closed ash discharge valve, a flue gas inlet, a gas flow uniform baffle, a filter bag, and a pulse blowing device;
- the ash silo is arranged under the dust removal and denitration integrated arrangement, the closed ash discharge valve is arranged at the ash silo discharge port, the flue gas inlet is arranged on the side wall of the upper part of the filter bag purifying functional section, and the filter bag is vertically embedded in the flower
- the inside of the plate hole is evenly distributed along the longitudinal direction, and the airflow uniform baffle is disposed between the flue gas inlet and the filter bag, and the upper part of the filter bag is provided with a pulse blowing device.
- the mixed pyrolysis regeneration section includes a jet pyrolysis gas delivery injection structure, an ammonia spray structure, and a mixed current sharing structure;
- the pyrolysis gas conveying injection structure comprises a plurality of air supply ducts arranged in parallel, each air supply duct is provided with an air volume regulating valve, and the air supply duct of the orifice plate is arranged on the air supply duct of the desulfurization tower;
- the ammonia spray structure is arranged Above the pyrolysis gas transport injection structure body, a plurality of parallel sprayed ammonia pipelines are arranged, each of which has an ammonia spray regulating valve, and an ammonia injection nozzle is uniformly distributed on the ammonia spray pipeline;
- the mixed current sharing structure is arranged Above the ammonia spray structure, it is composed of 1 to 4 layers of porous plates having a curved corrugation or an angular corrugation shape, and adjacent layers are staggered at an angle of 90° in the corrugation direction.
- the denitration catalyst functional section includes a denitration catalyst and a purified flue gas outlet, the denitration catalyst is disposed in two to four layers, and the purified flue gas outlet is disposed in the dust removal and denitration. The top of the device.
- ammonia gas-flue gas mixer is disposed on the ammonia gas transmission pipeline of the dust removal and denitration integrated device, the ammonia gas inlet is connected to the ammonia gas outer line, and the flue gas inlet is connected through the ammonia gas dilution fan. Flue gas pipeline behind the fan.
- a preferred solution is that the filter bag in the dust removal and denitration integrated device adopts pulse backflushing, and the compressed air pipe is connected to the compressed air unit; and the pyrolysis gas in the mixed pyrolysis regeneration section of the dust removal and denitration integrated device
- the conveying pipe is connected to the external gas hot blast stove.
- the purification device further includes a public auxiliary system, wherein the public auxiliary system includes a compressed air unit and steam, a process water unit; compressed air in the compressed air unit, is used for filter bag pulse cleaning; steam, process The steam in the water unit is used to prepare the sodium-based desulfurizer solution and the circulating ash solution; the steam, the process water in the process water unit, the sodium-based desulfurizer solution and the circulating ash solution, and the cooling and anti-sulfurization system rinse.
- the public auxiliary system includes a compressed air unit and steam, a process water unit; compressed air in the compressed air unit, is used for filter bag pulse cleaning; steam, process The steam in the water unit is used to prepare the sodium-based desulfurizer solution and the circulating ash solution; the steam, the process water in the process water unit, the sodium-based desulfurizer solution and the circulating ash solution, and the cooling and anti-sulfurization system rinse.
- Rotary spray drying desulfurization can effectively remove SO 2 from flue gas, effectively prevent the formation of ammonium sulfate in the denitration section to block the catalyst; the desulfurization product is 50-100um dry particles, and the particulate matter enters the dust removal section from the desulfurization tower.
- the filter bag On the outer surface of the dust filter bag, the filter bag is pre-sprayed, which can effectively adsorb viscous pollutants such as tar in the flue gas and protect the catalyst;
- the dust removal and denitrification integrated equipment can filter and collect the desulfurization ash, and then re-feed it to the desulfurization tower after the second liquid distribution to realize the recycling of the desulfurization ash and improve the utilization rate of the sodium-based desulfurizer;
- FIG. 1 is a schematic flow chart of a coke oven flue gas desulfurization and denitration combined purification process according to an embodiment of the present invention
- FIG. 2 is a schematic structural view of a coke oven flue gas desulfurization and denitration combined purification process according to an embodiment of the present invention.
- FIG. 1 shows a coke oven flue gas desulfurization and denitration combined purification process according to an embodiment of the present invention.
- the coke oven flue gas desulfurization and denitration combined purification process comprises the following steps: S110: in the desulfurization system, the coke oven flue gas is subjected to rotary spray semi-dry method to reduce desulfurization at a low temperature;
- the above is the flow of the coke oven flue gas desulfurization and denitrification combined purification process, that is, before the flue gas denitration, the rotary spray semi-dry method is used to efficiently dehumidify and desulfurize, and then the residual ammonia produced by the coking plant steaming section is used or purchased.
- the ammonia vapor evaporated by the liquid ammonia is used as a reducing agent, and the denitration process is carried out by the selective catalytic reduction method.
- the denitration process is carried out in the integrated equipment for dust removal and denitration, and the particulate matter is removed by dust removal before denitration.
- FIG. 2 shows the structure of the coke oven flue gas desulfurization and denitration combined purification process of the embodiment of the present invention.
- the coke oven flue gas desulfurization and denitration combined purification process of the present invention specifically comprises the following steps:
- the coke oven flue gas is sucked from the coke oven flue 6 of the coke oven chimney 7 under the action of the induced draft fan 1a, and is transported into the desulfurization system through the flue gas pipeline 1d; the induced draft fan 1a is equipped with a variable frequency motor,
- the fan 1a performs frequency conversion speed regulation (may also use coupling speed regulation or permanent magnet speed regulation) and adjusts the wind electric control valve 1b on the flue gas duct 1d of the coke oven flue gas inlet end, which can ensure the normal production of the coke oven
- the required negative pressure value and the pressure value required for the normal operation of the desulfurization and dust removal and denitration system; that is, the fan is equipped with a variable frequency motor or a coupler or a permanent magnet governor, and the frequency converter is controlled by the frequency converter or the fluid coupling is used.
- Speed regulation or permanent magnet speed regulation mode to adjust the speed and adjust the wind electric control valve to provide the coke oven with the pressure required for the normal production of the coke oven, and meet the pressure requirements required for the normal operation of the desulfurization system and the dust removal and denitration system;
- the desulfurization system is composed of a desulfurization tower 2a, a sodium-based desulfurizer solution preparation unit 2b, a circulating ash solution preparation unit 2c, and a solution delivery unit 2d, and the Na 2 CO 3 solution prepared by the sodium-based desulfurizer solution preparation unit 2b is transported through the solution.
- the unit 2d is sent to the top tank 2f at the top of the desulfurization tower 2a, and then the sodium-based desulfurizer solution flows into the atomizer 2g, and the atomizer 2g atomizes the sodium-based desulfurizer solution into 50-100 ⁇ m particles;
- the dust removal and denitration system is provided with a dust removal and denitrification integrated device 3a, an ammonia gas dilution fan 3b, an ammonia gas-flue gas mixer 3c and a desulfurization ash collection and transportation device 3d; the flue gas first enters the dust removal and denitration integrated device 3a.
- the bag purifying function section 3f the dust in the flue gas is blocked outside the filter bag and attached to the surface of the filter bag, and the pressure equalization effect of the filter bag resistance layer makes the flue gas uniformly distributed on the cross section of the filter layer;
- the flue gas flows out from the top of the dust removal and denitration integrated device 3a, and is sent back to the coke oven flue 6 through the induced draft fan 1a and the air supply electric valve 1c, and is discharged through the coke oven chimney 7;
- the particulate matter in the flue gas filtered in the dedusting and denitrification integrated device 3a and the reactant generated by the desulfurization are transported to the circulating ash solution preparation unit 2c in the desulfurization system through the desulfurization ash collection and transport device 3d, and are configured into a cycle.
- the ash solution is then sent to the top tank 2f at the top of the desulfurization tower 2a via the solution transport unit 2d to participate in the coke oven flue gas desulfurization process, so that the unreacted sodium-based desulfurizing agent is fully utilized.
- the residual ammonia water generated from the steaming plant of the coking plant or the ammonia vapor evaporated by the purchased liquid ammonia is mixed with the purified flue gas extracted by the ammonia dilution fan 3b in the ammonia gas-flue gas mixer 3c. After dilution, it is sent to the dust removal and denitration integrated device 3a for denitration reaction.
- the gas hot blast stove 3e periodically sends the high temperature pyrolysis gas to the mixed pyrolysis regeneration section 3g in the dust removal and denitration integrated equipment 3a to promote the regeneration of the denitration catalyst.
- a coke oven flue gas desulfurization and denitration combined purification device comprising a desulfurization tower 2a and a dust removal and denitrification integrated device 3a, and a dust removal and denitration integrated device 3a is provided with a filter bag purification function section 3f from the bottom to the top, and a mixed pyrolysis
- the regeneration section 3g and the denitration catalyst functional section 3h; the flue gas pipeline 1d drawn from the coke oven flue 6 is sequentially connected to the desulfurization tower 2a and the dust removal and denitration integrated equipment 3a to form a flue gas circulation purification system, and the dust removal and denitration integrated equipment 3a is connected.
- the flue gas duct 1d of the coke oven flue 6 is provided with an induced draft fan 1a equipped with a variable frequency motor; the atomizer 2g at the top of the desulfurization tower 2a is connected with the top tank 2f, and the sodium-based desulfurizer solution is respectively connected through the solution transport unit 2d.
- the preparation unit 2b and the circulating ash solution preparation unit 2c, the circulating ash solution preparation unit 2c is connected to the bottom ash silo of the dust removal and denitration integrated device 3a through the desulfurization ash collection and transport device 3d.
- the filter bag purifying function section 3f in the dust removal and denitration integrated device includes a ash silo, a closed ash discharge valve, a flue gas inlet, a gas flow uniform baffle, a filter bag, and a pulse spray.
- Blowing device the ash bin is located below the filter bag purifying function section of the dust removal and denitrification integrated equipment, and the closed ash discharging valve is installed at the ash silo discharge port;
- the flue gas inlet is arranged at the upper side of the desulfurizing dust collecting and purifying filter bag purifying function section
- the multi-row filter bags are vertically embedded in the flower plate holes, and are evenly distributed along the longitudinal direction.
- the air flow uniform baffles are disposed between the flue gas inlet and the filter bag, and the upper part of the filter bag is provided with a pulse blowing device.
- the ash silo is used to collect and store the particulate matter separated from the flue gas.
- One function of the closed ash discharge valve is to prevent the outside air from penetrating into the device through the discharge port to reduce the temperature of the flue gas, and the other function is to discharge the ash silo. Dust particles collected.
- the upper part of the filter bag purifying function section 3f includes a flue gas inlet, a gas flow uniform baffle, a filter bag, and a pulse blowing device.
- the flue gas inlet is arranged on the side tower body above the filter bag purifying function section, and the multi-row filter bag is vertically embedded in the filter bag purifying function segment flower plate hole, and is evenly distributed along the longitudinal direction, and the airflow uniform baffle is arranged at Between the flue gas inlet and the filter bag.
- the airflow uniform baffle is a labyrinth structure composed of angled steel plates, which can coarsely separate the coarse pulverized coal powder contained in the dust gas, and at the same time conduct diversion of the dusty flue gas to make the airflow distribution on the surface of the filter bag uniform and avoid The dust-containing gas directly washes the surface of the filter bag, which affects the efficiency and service life of the filter bag.
- the pulse blowing device is arranged in the clean air area of the upper part of the filter bag for pulse backflushing and cleaning the filter bag.
- the mixed pyrolysis regeneration section 3g includes an ammonia spray structure, a pyrolysis gas transport injection structure, and a mixed current sharing structure.
- the pyrolysis gas conveying injection structure body is composed of a plurality of air supply ducts arranged in parallel, and each air supply duct is provided with an air volume regulating valve, and the air supply ducts are arranged on the air supply ducts in the tower;
- the ammonia spray structure is arranged Above the pyrolysis gas conveying injection structure, a plurality of parallel spraying ammonia pipelines are arranged, each of the ammonia spraying pipelines is provided with an ammonia spraying regulating valve, and the ammonia spraying pipeline is uniformly distributed with an ammonia injection port;
- the mixed current sharing structure It is arranged above the ammonia spraying structure, and is composed of 1 to 4 layers of porous plates having an arc-shaped corrugation or an angular corrugation shape, and the adjacent two layers are staggered at an angle of 90°
- the denitration catalyst functional section 3h includes a denitration catalyst and a purified flue gas outlet, the denitration catalyst is arranged in layers 2 to 4, and the purified flue gas outlet is disposed at the top of the dust removal and denitration integrated device.
- a wind electric control valve 1b is arranged on the flue gas duct 1d between the coke oven flue 6 and the desulfurization tower 2a, and a flue gas electric valve is arranged on the flue gas duct 1d between the draft fan 1a and the coke oven flue 6. 1c.
- the ammonia gas transmission pipe of the dust removal and denitration integrated device 3a is provided with an ammonia gas-flue gas mixer 3c, the ammonia gas inlet of the ammonia gas-flue gas mixer 3c is connected to the ammonia gas outer line 5, and the flue gas inlet is passed through the ammonia gas.
- the dilution fan 3b is connected to the flue gas duct 1d (in the direction of flue gas transport) after the draft fan 1a.
- the sodium-based desulfurizing agent solution preparation unit 2b and the circulating ash solution preparation unit 2c are additionally connected to the steam, process water unit 4b.
- a flue gas distributor 2e is provided at the top of the desulfurization tower 2a.
- the filter bag in the dust removal and denitrification integrated device 3a adopts pulse backflushing and cleaning, and the compressed air pipe is connected to the external compressed air unit 4a; the pyrolysis gas delivery pipe in the mixed pyrolysis regeneration section 3g of the dust removal and denitration integrated device is connected to the external Gas hot blast stove 3e.
- the present invention also provides a coke oven flue gas desulfurization and denitration combined purification device including an air intake system, a desulfurization system, a dust removal and denitration system, and a public auxiliary system, a coke oven Flue gas circulation purification, coke oven flue gas flow path is coke oven flue 6 ⁇ desulfurization tower 2a ⁇ dust removal and denitrification integrated equipment 3a ⁇ induced draft fan 1a ⁇ coke oven flue 6 ⁇ coke oven chimney 7 ⁇ outer row.
- the air intake system includes a flue gas duct 1d, an induced draft fan 1a disposed on the flue gas duct 1d, a wind electric control valve 1b, and a blower electric valve 1c for attracting and returning the coke oven flue gas, which is a coke oven
- the flue gas circulation purification provides power; the induced draft fan 1a is installed at the end of the coke oven flue gas circulation purification system, and the desulfurization tower 2a and the dust removal and denitration integrated device 3a are in a negative pressure operation state.
- the induced draft fan 1a is equipped with a variable frequency motor or a coupler or a permanent magnet governor.
- the negative pressure value required for the normal production of the coke oven can be ensured.
- the desulfurization system comprises a desulfurization tower 2a, a sodium-based desulfurizer solution preparation unit 2b, a circulating ash solution preparation unit 2c and a solution delivery unit 2d for removing SO 2 from the coke oven flue gas; the desulfurization tower 2a is provided with a coke oven smoke
- the gas inlet, the atomizer 2g, the top tank 2f and the flue gas distributor 2e, the liquid outlet of the top tank 2f is connected to the atomizer 2g, the liquid inlet is connected to the sodium-based desulfurizer solution preparation unit 2b, and the circulating ash solution is prepared.
- Unit 2c Unit 2c.
- the sodium-based desulfurizer solution preparation unit 2b is provided with a sodium-based desulfurizer storage bin, a variable frequency discharge valve, a weighing feeder, a liquid distribution tank, a solution tank, and a heating water tank for preparing a certain concentration of sodium-based desulfurizer solution. Used for desulfurization of coke oven flue gas.
- the circulating ash solution preparation unit 2c is provided with a desulfurization ash silo, a frequency conversion discharge valve, a fixed frequency discharge valve, a weighing feeder, and a circulating ash solution tank for formulating the collected desulfurization ash into a solution.
- the sodium-based desulfurizing agent is reused and then discharged.
- the solution conveying unit 2d is provided with a sodium-based desulfurizing agent solution pump, a circulating ash solution pump, a solution conveying pipe, and a valve for conveying the formulated sodium-based desulfurizing agent solution and the circulating ash solution to the top tank 2f at the top of the desulfurization tower 2a. .
- the lower part of the desulfurization tower 2a is provided with a flue gas outlet, the bottom is provided with a cone ash hopper, and the ash hopper outlet is provided with a lock gas discharge valve;
- the desulfurization ash collection and transportation equipment 3d comprises a scraper and a bucket lifter for dedusting and denitrification.
- the desulfurized ash discharged from the chemical plant 2a is sent to the circulating ash solution preparation unit 2c of the desulfurization system.
- the dust removal and denitration system includes dust removal and denitrification integrated equipment 3a, ammonia dilution fan 3b, ammonia gas-flue gas mixer 3c, desulfurization ash collection and transportation equipment 3d and gas hot air furnace 3e; flue gas after desulfurization is integrated in dust removal and denitration the first filter unit 3a dust, and then mixed with the diluted ammonia gas, into the catalyst layer; NO X in the flue gas is reacted with ammonia over a catalyst, NO X is reduced to produce nitrogen gas.
- the dust removal and denitrification integrated device 3a has a particulate matter purifying function, and the flue gas first contacts the filter bag to prevent the dust from entering the denitration layer, and at the same time, the uniform pressure of the filter bag resistance layer is used to realize the uniform distribution of the flue gas on the cross section of the filter layer;
- the unreacted sodium-based desulfurizing agent is blocked from adhering to the outer surface of the filter bag, and continues to react with SO 2 in the flue gas to further improve the desulfurization efficiency.
- the public auxiliary system includes a compressed air unit 4a and steam, a process water unit 4b, compressed air for filter bag pulse cleaning, steam and process water for formulating a sodium-based desulfurizer solution and a circulating ash solution; and part of the process water for the desulfurization system Cooling and backwashing.
- the coke oven flue gas desulfurization and denitration combined purification device and the flue gas pipeline provided by the invention are provided with thermal insulation materials to ensure the system temperature is lowered, and the temperature requirements of the coke oven chimney 7 are discharged.
- the coke oven flue gas desulfurization and denitration combined purification process and device provided by the invention combines desulfurization by rotary spray drying with desulfurization of low temperature SCR to realize high-efficiency desulfurization and denitrification of the flue gas of the coke oven.
- the process is simple, the floor space is small, and the equipment investment is small.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
A coke oven flue gas desulfurization and denitrification combined purification process and apparatus. The process comprises the following steps: desulfurizing coke oven flue gas at low temperature drop by means of a rotating spray semi-dry method in a desulfurization system; filtering particles in a dust removal manner in a dust removal and denitrification system, and denitrating the coke oven flue gas desulfurized at the low temperature drop and filtered in the dust removal manner in a dust removal and denitrification integrated device (3a) by using a selective catalytic reduction method; and returning the denitrated flue gas to a coke oven flue (6), and discharging the flue gas by means of a coke oven chimney (7). The apparatus comprises: an induced draught system, a desulfurization system, and a dust removal and denitrification system.
Description
本发明涉及焦炉烟道气净化技术领域,尤其涉及一种焦炉烟道气脱硫脱硝联合净化工艺及装置。The invention relates to the technical field of coke oven flue gas purification, in particular to a coke oven flue gas desulfurization and denitration combined purification process and device.
近年来,国家明确了焦化行业中焦炉烟道气中SO2、NOX的排放浓度指标,要求对SO2、NOX的排放进行严格控制。燃煤电厂烟道气量大、SO2和NOX浓度高,对大气环境污染严重,脱硫、脱硝工作开展得早,目前方法已相当成熟,脱硫脱硝效果显著。但对焦炉烟道气而言,由于其自身的特点,电厂脱硫脱硝技术并不适用焦炉烟道气的脱硫脱硝,具体原因如下:In recent years, the state clearly the coking industry in SO 2, coke oven flue gas emission concentration index in NO X, the requirements of 2 NO X emissions of SO, strictly controlled. Coal-fired power plant flue gas, high concentrations of SO 2 and NO X, of atmospheric pollution, desulfurization, denitrification work carried out early, current methods is quite mature, significant effect desulfurization and denitration. However, in the case of the coke oven flue gas, due to its own characteristics, the desulfurization and denitration technology of the power plant is not suitable for the desulfurization and denitrification of the coke oven flue gas. The specific reasons are as follows:
(1)焦炉烟道气温度较低,一般在180℃~290℃之间。(1) The temperature of the coke oven flue gas is relatively low, generally between 180 °C and 290 °C.
(2)焦炉烟道气中SO2含量一般在100~200mg/Nm3,对于原料煤中有机硫含量较高或焦炉窜漏比较严重的焦化厂,其焦炉烟道气中的SO2含量可达350mg/Nm3以上。(2) The SO 2 content in the coke oven flue gas is generally 100-200 mg/Nm 3 . For the coking plant with high organic sulfur content in the raw coal or serious coke oven leakage, the SO in the coke oven flue gas 2 content can reach 350mg/Nm 3 or more.
(3)对于新建焦化厂,通过废气循环技术、分段加热技术等手段可将NOX含量有效控制在<500mg/Nm3;但对于现有企业或特别地区,无法通过改进焦炉加热方法满足NOX排放标准要求,必须采取烟道气后脱硝措施。(3) The new coking plant, the exhaust gas recirculation technique, heating means segmentation technology can be effectively controlled in the NO X content of <500mg / Nm 3; For existing business or special area, can not be met by improving the coke oven heating method NO X emission standards, measures must be taken after the denitration of flue gas.
(4)炼焦方法要求焦炉烟囱必须始终保持热备状态,以保证焦炉正常安全生产;脱硫脱硝净化后的焦炉烟道气温度必须高于烟道气露点温度,且不宜低于130℃。(4) The coking method requires that the coke oven chimney must be kept in a hot standby state to ensure the normal and safe production of the coke oven; the temperature of the coke oven flue gas after desulfurization and denitrification purification must be higher than the flue gas dew point temperature, and should not be lower than 130 °C. .
(5)焦炉实际运行情况表明,随着焦炉炉龄的增长,炉墙不可避免地会发生串漏;碳化室内产生的焦油会串入焦炉烟道气当中,焦油是强粘性物质,对催化剂是潜在的威胁,可对催化剂造成永久性损伤。(5) The actual operation of the coke oven shows that as the coke oven age increases, the furnace wall will inevitably lead to cross-leakage; the tar produced in the carbonization chamber will be inserted into the coke oven flue gas, and the tar is a strong viscous substance. A potential threat to the catalyst that can cause permanent damage to the catalyst.
由于焦炉烟道气温度低于电厂常规SCR催化剂的使用温度,且烟道气中含有SO2,直接采用电厂常规SCR脱硝方法会生成大量硫酸铵盐,堵塞催化剂,且烟道气中焦油等粘性组分必会粘附在催化剂表面,造成永久性伤害,
无法正常进行脱硝。直接采用电厂常温湿法脱硫会造成焦炉烟道气温度不能满足排放要求。虽然可以通过加热焦炉烟道废气来解决低温问题,但会造成能源浪费,同时增加一次投资及运行费用。因此,有针对性地开发一种焦炉烟道气的脱硫脱硝净化工艺及装置十分必要。Since the temperature of the coke oven flue gas is lower than the temperature of the conventional SCR catalyst of the power plant, and the flue gas contains SO 2 , the conventional SCR denitration method of the power plant directly generates a large amount of ammonium sulfate salt, blocks the catalyst, and the tar in the flue gas. The viscous component must adhere to the surface of the catalyst, causing permanent damage and failure to properly denitrify. The direct use of the normal temperature wet desulfurization of the power plant will cause the temperature of the coke oven flue gas to fail to meet the emission requirements. Although the low temperature problem can be solved by heating the coke oven flue gas, it will cause energy waste and increase the investment and operating costs. Therefore, it is necessary to develop a desulfurization and denitration purification process and device for coke oven flue gas.
发明内容Summary of the invention
本发明提供了一种焦炉烟道气脱硫脱硝联合净化工艺及装置,将旋转喷雾干燥法脱硫与低温SCR脱硝相结合,实现对焦炉烟道气的高效脱硫脱硝,且工艺过程简单,占地面积小,设备投资少。The invention provides a coke oven flue gas desulfurization and denitration combined purification process and device, and combines rotary spray drying desulfurization with low temperature SCR denitrification to realize high-efficiency desulfurization and denitrification of coke oven flue gas, and the process is simple, accounting for The land area is small and the equipment investment is small.
技术方案Technical solutions
为了达到上述目的,本发明提供了一种焦炉烟道气脱硫脱硝联合净化工艺,包括如下步骤:In order to achieve the above object, the present invention provides a coke oven flue gas desulfurization and denitration combined purification process, comprising the following steps:
在脱硫系统中,对焦炉烟道气进行旋转喷雾半干法低温降脱硫;在除尘脱硝系统中,对颗粒物进行除尘过滤;并且利用选择性催化还原法,对经过低温降脱硫和除尘过滤的焦炉烟道气在除尘脱硝一体化设备中进行脱硝;以及,将脱硝后的烟道气回送至焦炉烟道,通过焦炉烟囱外排。In the desulfurization system, the coke oven flue gas is subjected to rotary spray semi-dry method for low-temperature desulfurization; in the dust removal and denitration system, the particulate matter is subjected to dust removal and filtration; and the selective catalytic reduction method is used for desulfurization and dust removal after low temperature drop. The coke oven flue gas is denitrified in the dust removal and denitrification integrated equipment; and the flue gas after denitration is sent back to the coke oven flue and discharged through the coke oven chimney.
此外,优选的方案是,旋转喷雾半干法低温降脱硫的过程包括:焦炉烟道气在引风机作用下,从焦炉烟囱根部的焦炉烟道吸出,通过烟道气管道输送进入脱硫系统;其中,脱硫系统由脱硫塔、钠基脱硫剂溶液制备单元、循环灰溶液制备单元和溶液输送单元组成;在脱硫系统中,将通过溶液输送单元输送至脱硫塔顶罐的钠基脱硫剂溶液用雾化器雾化成50~100μm的钠基脱硫剂微粒;通过脱硫塔顶部的烟道气分配器使焦炉烟道气气流在脱硫塔内均匀分布,与雾化后的钠基脱硫剂微粒在所述脱硫塔内充分反应,生成亚硫酸钠及硫酸钠,从而脱除焦炉烟道气中的SO2,粉状亚硫酸钠及硫酸钠随焦炉烟道气脱硫后的烟道气进入除尘脱硝系统。In addition, the preferred solution is that the rotary spray semi-dry method low temperature desulfurization process comprises: the coke oven flue gas is sucked out from the coke oven flue at the root of the coke oven chimney by the induced draft fan, and is transported into the desulfurization through the flue gas pipeline. a system; wherein the desulfurization system is composed of a desulfurization tower, a sodium-based desulfurizer solution preparation unit, a circulating ash solution preparation unit, and a solution delivery unit; and in the desulfurization system, a sodium-based desulfurizer that is transported to the desulfurization tower top tank through the solution delivery unit The solution is atomized into a sodium-based desulfurizer particle of 50-100 μm by a nebulizer; the flue gas stream of the coke oven is uniformly distributed in the desulfurization tower through a flue gas distributor at the top of the desulfurization tower, and the sodium-based desulfurizing agent after atomization The fine particles are fully reacted in the desulfurization tower to form sodium sulfite and sodium sulfate, thereby removing SO 2 from the flue gas of the coke oven, and the flue gas after desulfurization of the coke oven flue gas enters the dust removal and denitration. system.
此外,优选的方案是,对颗粒物进行除尘过滤的过程包括:除尘脱硝系统设有除尘滤袋、脱硫灰收集输送设备,烟道气首先进入除尘脱硝一体化设备的滤袋净化功能段,烟道气中的粉尘被阻隔在滤袋之外并附着在滤袋表面,同时滤袋阻力层的均压作用使烟道气在过滤层截面上均布。
In addition, the preferred solution is that the dust removal and filtration process of the particulate matter comprises: the dust removal and denitration system is provided with a dust removal filter bag, a desulfurization ash collection and transportation device, and the flue gas first enters the filter bag purification function section of the dust removal and denitration integrated device, the flue. The dust in the gas is blocked outside the filter bag and adheres to the surface of the filter bag, and the pressure equalization of the filter bag resistance layer causes the flue gas to be evenly distributed on the cross section of the filter layer.
此外,优选的方案是,利用选择性催化还原法,对经过低温降脱硫和除尘过滤的焦炉烟道气进行脱硝的过程包括:过滤后的烟道气经过混合热解再生段时与喷入的氨气混合,然后进入脱硝催化剂功能段,烟道气中的NOx在脱硝催化剂作用下被氨气还原成N2。In addition, a preferred solution is to denitrify the coke oven flue gas subjected to low temperature desulfurization and dust removal filtration by a selective catalytic reduction method, including: the filtered flue gas is subjected to a mixed pyrolysis regeneration section and injected. ammonia mixed, and then into functional segments denitration catalyst, NO x in the flue gas is reduced to N 2 in the ammonia catalyst denitration.
此外,优选的方案是,在除尘脱硝一体化设备中被过滤下来的烟道气中的颗粒物以及脱硫生成的反应物,通过脱硫灰收集输送设备输送至循环灰溶液制备单元,配制成循环灰溶液后经溶液输送单元输送至脱硫塔顶部的顶罐,参与焦炉烟道气脱硫过程,使未反应的钠基脱硫剂得到充分利用。In addition, a preferred solution is that the particulate matter in the flue gas filtered by the dust removal and denitration integrated device and the reactant formed by the desulfurization are transported to the circulating ash solution preparation unit through the desulfurization ash collection and conveying device to prepare a circulating ash solution. After that, it is sent to the top tank at the top of the desulfurization tower through the solution conveying unit, and participates in the desulfurization process of the coke oven flue gas, so that the unreacted sodium-based desulfurizing agent is fully utilized.
此外,优选的方案是,在除尘脱硝系统中,氨气在氨气-烟道气混合器内与氨气稀释风机抽取的净化后烟道气混合稀释后送入除尘脱硝一体化设备中进行脱硝反应。In addition, the preferred solution is that in the dust removal and denitration system, the ammonia gas is mixed and diluted with the purified flue gas extracted by the ammonia dilution fan in the ammonia gas-flue gas mixer, and then sent to the dust removal and denitration integrated device for denitration. reaction.
此外,优选的方案是,燃气热风炉定期将高温热解气体送入除尘脱硝一体化设备中的混合热解再生段,实现脱硝催化剂原位热解再生。In addition, a preferred solution is that the gas hot blast stove periodically sends the high temperature pyrolysis gas to the mixed pyrolysis regeneration section in the dust removal and denitration integrated equipment to realize in situ pyrolysis regeneration of the denitration catalyst.
此外,本发明还提供了一种焦炉烟道气脱硫脱硝联合净化装置,包括引风系统、脱硫系统和除尘脱硝系统,其中,引风系统,用于吸引并回送焦炉烟道气,为焦炉烟道气循环净化提供动力;脱硫系统,用于脱除焦炉烟道气中的SO2;除尘脱硝系统,用于对脱硫后的烟道气先除尘,然后将除尘后的烟道气进行脱硝处理。In addition, the present invention also provides a coke oven flue gas desulfurization and denitration combined purification device, comprising an air induction system, a desulfurization system and a dust removal and denitration system, wherein the air introduction system is used for attracting and returning the coke oven flue gas, The coke oven flue gas circulation purification provides power; the desulfurization system is used to remove SO 2 from the coke oven flue gas; the dust removal and denitration system is used to dedust the flue gas after desulfurization, and then the flue gas after dedusting The gas is subjected to denitration treatment.
此外,优选的方案是,引风系统包括烟道气管道、设置在烟道气管道上的引风机、设置在焦炉烟道与脱硫塔之间的烟道气管道上的取风电动调节阀,设置在引风机与焦炉烟道之间的烟道气管道上的送风电动阀;其中,引风机配备有变频电机或耦合器或永磁调速器,通过对引风机进行调速、调节取风电动调节阀,为脱硫系统及除尘脱硝系统提供所正常工作所需要的压力。In addition, a preferred solution is that the air intake system includes a flue gas duct, an induced draft fan disposed on the flue gas duct, and a wind electric control valve disposed on the flue gas duct between the coke oven flue and the desulfurization tower, and the setting The air supply electric valve on the flue gas pipeline between the induced draft fan and the coke oven flue; wherein the induced draft fan is equipped with a variable frequency motor or a coupler or a permanent magnet governor, and the air blower is adjusted to adjust the wind The electric control valve provides the pressure required for normal operation of the desulfurization system and the dust removal and denitration system.
此外,优选的方案是,脱硫系统包括脱硫塔、钠基脱硫剂溶液制备单元、循环灰溶液制备单元和溶液输送单元;其中,在脱硫塔的顶部设有焦炉烟道气入口、雾化器、顶罐和烟道气分配器,在顶罐的出液口连接雾化器,顶罐的进液口连接钠基脱硫剂溶液制备单元和循环灰溶液制备单元。In addition, a preferred solution is that the desulfurization system includes a desulfurization tower, a sodium-based desulfurizer solution preparation unit, a circulating ash solution preparation unit, and a solution delivery unit; wherein a coke oven flue gas inlet and an atomizer are disposed at the top of the desulfurization tower. The top tank and the flue gas distributor are connected to the atomizer at the liquid outlet of the top tank, and the liquid inlet of the top tank is connected to the sodium-based desulfurizer solution preparation unit and the circulating ash solution preparation unit.
此外,优选的方案是,钠基脱硫剂溶液制备单元包括钠基脱硫剂储仓、变频卸料阀、称重给料机、配液罐、溶液罐和加热水箱;并且,用于制备钠基脱硫剂溶液,以供焦炉烟道气脱硫使用。
In addition, a preferred solution is that the sodium-based desulfurizer solution preparation unit includes a sodium-based desulfurizer storage bin, a variable frequency discharge valve, a weighing feeder, a dosing tank, a solution tank, and a heating water tank; and, for preparing a sodium base The desulfurizer solution is used for desulfurization of the coke oven flue gas.
此外,优选的方案是,循环灰溶液制备单元包括脱硫灰仓、变频卸料阀、定频卸料阀、称重给料机、循环灰溶液罐;并且,用于将收集的脱硫灰配制成溶液,重复利用其中的钠基脱硫剂后再外排。In addition, a preferred solution is that the circulating ash solution preparation unit comprises a desulfurization ash silo, a variable frequency discharge valve, a fixed frequency discharge valve, a weighing feeder, a circulating ash solution tank; and, for preparing the collected desulfurization ash The solution is reused after reusing the sodium-based desulfurizing agent therein.
此外,优选的方案是,溶液输送单元包括钠基脱硫剂溶液泵、循环灰溶液泵及溶液输送管道、阀门;并且,用于将配制合格的钠基脱硫剂溶液和循环灰溶液输送至所述顶罐。In addition, a preferred solution is that the solution delivery unit comprises a sodium-based desulfurizer solution pump, a circulating ash solution pump and a solution delivery pipe, a valve; and, for conveying the formulated sodium-based desulfurizer solution and the circulating ash solution to the Top can.
此外,优选的方案是,除尘脱硝系统包括除尘脱硝一体化设备、氨气稀释风机、氨气-烟道气混合器和脱硫灰收集输送设备;除尘脱硝一体化设备自下而上包括滤袋净化功能段、混合热解再生段、脱硝催化剂功能段;In addition, the preferred solution is that the dust removal and denitration system comprises an integrated dust removal and denitration device, an ammonia dilution fan, an ammonia gas-flue gas mixer and a desulfurization ash collection and transportation device; and the dust removal and denitration integrated device includes a filter bag purification from bottom to top. Functional section, mixed pyrolysis regeneration section, denitration catalyst functional section;
从焦炉烟道引出的烟道气管道依次连接脱硫塔和除尘脱硝一体化设备;除尘脱硝一体化设备连接引风机;脱硫塔顶部的雾化器与顶罐连接,并通过溶液输送单元分别连接钠基脱硫剂溶液制备单元和循环灰溶液制备单元,循环灰溶液制备单元通过脱硫灰收集输送设备连接除尘脱硝一体化设备的底部灰仓。The flue gas pipeline drawn from the coke oven flue is connected to the desulfurization tower and the dust removal and denitration integrated equipment in turn; the dust removal and denitration integrated equipment is connected to the induced draft fan; the atomizer at the top of the desulfurization tower is connected with the top tank, and is respectively connected by the solution conveying unit. The sodium-based desulfurizer solution preparation unit and the circulating ash solution preparation unit, and the circulating ash solution preparation unit is connected to the bottom ash bin of the dust removal and denitration integrated device through the desulfurization ash collection and transportation device.
此外,优选的方案是,滤袋净化功能段包括灰仓、密闭卸灰阀、烟道气入口、气流均布导流板、滤袋和脉冲喷吹装置;其中,In addition, a preferred solution is that the filter bag purifying functional section includes a ash silo, a closed ash discharge valve, a flue gas inlet, a gas flow uniform baffle, a filter bag, and a pulse blowing device;
灰仓设置在除尘脱硝一体化设下方,密闭卸灰阀设置在灰仓出料口处,所述烟道气入口设置在滤袋净化功能段上部的侧壁上,滤袋垂直嵌挂于花板孔内,且沿纵向均布,气流均布导流板设置在所述烟道气入口与滤袋之间,所述滤袋上部设脉冲喷吹装置。The ash silo is arranged under the dust removal and denitration integrated arrangement, the closed ash discharge valve is arranged at the ash silo discharge port, the flue gas inlet is arranged on the side wall of the upper part of the filter bag purifying functional section, and the filter bag is vertically embedded in the flower The inside of the plate hole is evenly distributed along the longitudinal direction, and the airflow uniform baffle is disposed between the flue gas inlet and the filter bag, and the upper part of the filter bag is provided with a pulse blowing device.
此外,优选的方案是,混合热解再生段包括喷热解气体输送喷射结构体、喷氨结构体、混合均流结构体;其中,In addition, a preferred solution is that the mixed pyrolysis regeneration section includes a jet pyrolysis gas delivery injection structure, an ammonia spray structure, and a mixed current sharing structure;
热解气体输送喷射结构体包括多条平行设置的送风管道,每条送风管道上均设有风量调节阀,位于脱硫塔的送风管道上均布孔板送风口;喷氨结构体设置在热解气体输送喷射结构体上方,包括多条平行设置的喷氨管道,每条喷氨管道上均设有喷氨调节阀,喷氨管道上均布氨喷射口;混合均流结构体设置在喷氨结构体上方,由1~4层呈弧形波纹或角型波纹形状的多孔板组成,且相邻两层之间按波纹方向相隔90°角交错布置。The pyrolysis gas conveying injection structure comprises a plurality of air supply ducts arranged in parallel, each air supply duct is provided with an air volume regulating valve, and the air supply duct of the orifice plate is arranged on the air supply duct of the desulfurization tower; the ammonia spray structure is arranged Above the pyrolysis gas transport injection structure body, a plurality of parallel sprayed ammonia pipelines are arranged, each of which has an ammonia spray regulating valve, and an ammonia injection nozzle is uniformly distributed on the ammonia spray pipeline; the mixed current sharing structure is arranged Above the ammonia spray structure, it is composed of 1 to 4 layers of porous plates having a curved corrugation or an angular corrugation shape, and adjacent layers are staggered at an angle of 90° in the corrugation direction.
此外,优选的方案是,脱硝催化剂功能段包括脱硝催化剂和净化烟道气出口,脱硝催化剂按2~4层设置,净化烟道气出口设置在所述除尘脱硝一
体化设备顶部。In addition, a preferred solution is that the denitration catalyst functional section includes a denitration catalyst and a purified flue gas outlet, the denitration catalyst is disposed in two to four layers, and the purified flue gas outlet is disposed in the dust removal and denitration.
The top of the device.
此外,优选的方案是,氨气-烟道气混合器设置在所述除尘脱硝一体化设备的氨气输送管道上,氨气入口连接氨气外线,烟道气入口通过氨气稀释风机连接引风机后的烟道气管道。In addition, a preferred solution is that the ammonia gas-flue gas mixer is disposed on the ammonia gas transmission pipeline of the dust removal and denitration integrated device, the ammonia gas inlet is connected to the ammonia gas outer line, and the flue gas inlet is connected through the ammonia gas dilution fan. Flue gas pipeline behind the fan.
此外,优选的方案是,除尘脱硝一体化设备中的滤袋采用脉冲反吹清灰,其压缩空气管道连接压缩空气单元;并且,除尘脱硝一体化设备的混合热解再生段中的热解气体输送管道连接外部的燃气热风炉。In addition, a preferred solution is that the filter bag in the dust removal and denitration integrated device adopts pulse backflushing, and the compressed air pipe is connected to the compressed air unit; and the pyrolysis gas in the mixed pyrolysis regeneration section of the dust removal and denitration integrated device The conveying pipe is connected to the external gas hot blast stove.
此外,优选的方案是,净化装置还包括公辅系统,其中,公辅系统包括压缩空气单元和蒸汽、工艺水单元;压缩空气单元中的压缩空气,用于滤袋脉冲清灰;蒸汽、工艺水单元中的蒸汽,用于配制钠基脱硫剂溶液和循环灰溶液;蒸汽、工艺水单元中的工艺水,用于配制钠基脱硫剂溶液和循环灰溶,以及对脱硫系统进行冷却和反冲洗。In addition, a preferred solution is that the purification device further includes a public auxiliary system, wherein the public auxiliary system includes a compressed air unit and steam, a process water unit; compressed air in the compressed air unit, is used for filter bag pulse cleaning; steam, process The steam in the water unit is used to prepare the sodium-based desulfurizer solution and the circulating ash solution; the steam, the process water in the process water unit, the sodium-based desulfurizer solution and the circulating ash solution, and the cooling and anti-sulfurization system rinse.
与现有技术相比,本发明的有益效果是:Compared with the prior art, the beneficial effects of the present invention are:
1)旋转喷雾干燥法脱硫能够高效脱除烟道气中的SO2,有效预防在脱硝段生成硫酸铵盐堵塞催化剂;脱硫产物为50~100um的干燥颗粒物,颗粒物从脱硫塔进入除尘段,附在除尘滤袋的外表面,对滤袋起到预喷涂作用,可有效吸附烟道气中的焦油等粘性污染物,并对催化剂起到保护作用;1) Rotary spray drying desulfurization can effectively remove SO 2 from flue gas, effectively prevent the formation of ammonium sulfate in the denitration section to block the catalyst; the desulfurization product is 50-100um dry particles, and the particulate matter enters the dust removal section from the desulfurization tower. On the outer surface of the dust filter bag, the filter bag is pre-sprayed, which can effectively adsorb viscous pollutants such as tar in the flue gas and protect the catalyst;
2)在除尘脱硫系统中未完全反应的钠基脱硫剂被阻隔附着在滤袋外表面,与烟道气中的SO2继续反应,进一步提高脱硫效率;2) The sodium-based desulfurizing agent which is not completely reacted in the dust removal and desulfurization system is blocked from adhering to the outer surface of the filter bag, and continues to react with SO 2 in the flue gas to further improve the desulfurization efficiency;
3)除尘脱硝一体化设备可过滤、收集脱硫灰,将其二次配液后重新送入脱硫塔,实现脱硫灰循环利用,提高钠基脱硫剂的利用率;3) The dust removal and denitrification integrated equipment can filter and collect the desulfurization ash, and then re-feed it to the desulfurization tower after the second liquid distribution to realize the recycling of the desulfurization ash and improve the utilization rate of the sodium-based desulfurizer;
4)脱硝之前先高效除尘,减少粉尘对脱硝催化剂的磨损,延长催化剂使用寿命;4) Efficient dust removal before denitrification, reducing the wear of dust on the denitration catalyst and prolonging the service life of the catalyst;
5)实现烟道气除尘、脱硝一体化,节省一次投资,降低运行费用,减少占地面积;5) Integrate flue gas dedusting and denitrification, save one investment, reduce operating costs and reduce floor space;
6)通过滤袋过滤层和静压混合层的均压作用,实现烟道气速度场、温度场分布更加均匀,进一步提高脱硝效率;6) Through the pressure equalization of the filter bag filter layer and the static pressure mixed layer, the flue gas velocity field and temperature field distribution are more uniform, and the denitration efficiency is further improved;
7)系统温降低,能够满足炼焦方法对焦炉烟囱必须始终保持热备状态的要求。7) The system temperature is lowered, which can meet the requirements of the coking method. The coke oven chimney must always be in the hot standby state.
为了实现上述以及相关目的,本发明的一个或多个方面包括后面将详细
说明并在权利要求中特别指出的特征。下面的说明以及附图详细说明了本发明的某些示例性方面。然而,这些方面指示的仅仅是可使用本发明的原理的各种方式中的一些方式。此外,本发明旨在包括所有这些方面以及它们的等同物In order to achieve the above and related objects, one or more aspects of the present invention include the details which will be described later
Features that are specified and particularly indicated in the claims. The following description and the annexed drawings set forth in detail However, these aspects are indicative of only some of the various ways in which the principles of the invention may be employed. Moreover, the invention is intended to include all such aspects and their equivalents
通过参考以下结合附图的说明及权利要求书的内容,并且随着对本发明的更全面理解,本发明的其它目的及结果将更加明白及易于理解。在附图中:图1为根据本发明实施例的焦炉烟道气脱硫脱硝联合净化工艺的流程示意图;Other objects and results of the present invention will become more apparent and appreciated from the <RTIgt; In the drawings: FIG. 1 is a schematic flow chart of a coke oven flue gas desulfurization and denitration combined purification process according to an embodiment of the present invention;
图2为本发明实施例的焦炉烟道气脱硫脱硝联合净化工艺的结构简图。2 is a schematic structural view of a coke oven flue gas desulfurization and denitration combined purification process according to an embodiment of the present invention.
图中:1a.引风机,1b.取风电动调节阀,1c.送风电动阀,1d.烟道气管道,2a.脱硫塔,2b.钠基脱硫剂溶液制备单元,2c.循环灰溶液制备单元,2d.溶液输送单元,2e.烟道气分配器,2f.顶罐,2g.雾化器,3a.除尘脱硝一体化设备,3b.氨气稀释风机,3c.氨气-烟道气混合器,3d.脱硫灰收集输送设备,3e.燃气热风炉,3f.滤袋净化功能段,3g.混合热解再生段,3h.脱硝催化剂功能段,4a.压缩空气单元,4b.蒸汽、工艺水单元,5.氨气外线,6.焦炉烟道,7.焦炉烟囱。In the figure: 1a. induced draft fan, 1b. wind electric control valve, 1c. air supply electric valve, 1d. flue gas pipeline, 2a. desulfurization tower, 2b. sodium-based desulfurizer solution preparation unit, 2c. circulating ash solution Preparation unit, 2d. solution delivery unit, 2e. flue gas distributor, 2f. top tank, 2g. atomizer, 3a. dust removal and denitrification integrated equipment, 3b. ammonia dilution fan, 3c. ammonia gas - flue Gas mixer, 3d. Desulfurization ash collection and transportation equipment, 3e. Gas hot air furnace, 3f. Filter bag purification function section, 3g. Mixed pyrolysis regeneration section, 3h. Denitration catalyst functional section, 4a. Compressed air unit, 4b. Steam , process water unit, 5. ammonia outside line, 6. coke oven flue, 7. coke oven chimney.
在下面的描述中,出于说明的目的,为了提供对一个或多个实施例的全面理解,阐述了许多具体细节。然而,很明显,也可以在没有这些具体细节的情况下实现这些实施例。In the following description, for the purposes of illustration However, it is apparent that these embodiments may be practiced without these specific details.
下面结合附图对本发明的具体实施方式作进一步说明:The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings:
为了说明本发明提供的焦炉烟道气脱硫脱硝联合净化工艺,图1示出了根据本发明实施例的焦炉烟道气脱硫脱硝联合净化工艺流程。In order to illustrate the coke oven flue gas desulfurization and denitration combined purification process provided by the present invention, FIG. 1 shows a coke oven flue gas desulfurization and denitration combined purification process according to an embodiment of the present invention.
如图1所示,本发明提供的焦炉烟道气脱硫脱硝联合净化工艺包括:包括如下步骤:S110:在脱硫系统中,对焦炉烟道气进行旋转喷雾半干法低温降脱硫;
As shown in FIG. 1 , the coke oven flue gas desulfurization and denitration combined purification process provided by the present invention comprises the following steps: S110: in the desulfurization system, the coke oven flue gas is subjected to rotary spray semi-dry method to reduce desulfurization at a low temperature;
S120:在除尘脱硝系统中,对颗粒物进行除尘过滤;并且利用选择性催化还原法,对经过低温降脱硫和除尘过滤的焦炉烟道气在除尘脱硝一体化设备中进行脱硝;S120: in the dust removal and denitration system, the particulate matter is subjected to dust filtration; and the selective catalytic reduction method is used to denitrate the coke oven flue gas which has undergone low temperature desulfurization and dust removal filtration in the dust removal and denitration integrated device;
S130:将脱硝后的烟道气回送至焦炉烟道,通过焦炉烟囱外排。S130: The flue gas after denitration is sent back to the coke oven flue, and is discharged through the coke oven chimney.
上述为本发明焦炉烟道气脱硫脱硝联合净化工艺的流程,即:在烟道气脱硝之前先进行旋转喷雾半干法高效低温降脱硫,然后采用焦化厂蒸氨工段产生的剩余氨水或购买的液氨蒸发的氨气作为还原剂,利用选择性催化还原法进行脱硝,脱硝过程在除尘脱硝一体化设备内进行,脱硝之前先除尘过滤颗粒物。The above is the flow of the coke oven flue gas desulfurization and denitrification combined purification process, that is, before the flue gas denitration, the rotary spray semi-dry method is used to efficiently dehumidify and desulfurize, and then the residual ammonia produced by the coking plant steaming section is used or purchased. The ammonia vapor evaporated by the liquid ammonia is used as a reducing agent, and the denitration process is carried out by the selective catalytic reduction method. The denitration process is carried out in the integrated equipment for dust removal and denitration, and the particulate matter is removed by dust removal before denitration.
为了详细说明上述的工艺流程,图2示出了本发明实施例的焦炉烟道气脱硫脱硝联合净化工艺的结构。In order to explain the above process flow in detail, FIG. 2 shows the structure of the coke oven flue gas desulfurization and denitration combined purification process of the embodiment of the present invention.
如图2所示,本发明的焦炉烟道气脱硫脱硝联合净化工艺具体包括如下步骤:As shown in FIG. 2, the coke oven flue gas desulfurization and denitration combined purification process of the present invention specifically comprises the following steps:
1)焦炉烟道气在引风机1a作用下,从焦炉烟囱7根部的焦炉烟道6吸出,通过烟道气管道1d输送进入脱硫系统;引风机1a配有变频电机,通过对引风机1a进行变频调速(也可以采用偶合器调速或永磁调速)及调节焦炉烟道气入口端烟道气管道1d上的取风电动调节阀1b,可以保证焦炉正常生产所需要的负压值和脱硫、除尘脱硝系统正常工作所需要的压力值;即:风机配备有变频电机或耦合器或永磁调速器,通过对引风机进行变频调速或者采用液力偶合器调速或永磁调速方式进行调速、调节取风电动调节阀,为焦炉提供焦炉正常生产所需要的压力,同时满足脱硫系统及除尘脱硝系统正常工作所需要的压力要求;1) The coke oven flue gas is sucked from the coke oven flue 6 of the coke oven chimney 7 under the action of the induced draft fan 1a, and is transported into the desulfurization system through the flue gas pipeline 1d; the induced draft fan 1a is equipped with a variable frequency motor, The fan 1a performs frequency conversion speed regulation (may also use coupling speed regulation or permanent magnet speed regulation) and adjusts the wind electric control valve 1b on the flue gas duct 1d of the coke oven flue gas inlet end, which can ensure the normal production of the coke oven The required negative pressure value and the pressure value required for the normal operation of the desulfurization and dust removal and denitration system; that is, the fan is equipped with a variable frequency motor or a coupler or a permanent magnet governor, and the frequency converter is controlled by the frequency converter or the fluid coupling is used. Speed regulation or permanent magnet speed regulation mode to adjust the speed and adjust the wind electric control valve to provide the coke oven with the pressure required for the normal production of the coke oven, and meet the pressure requirements required for the normal operation of the desulfurization system and the dust removal and denitration system;
2)脱硫系统由脱硫塔2a、钠基脱硫剂溶液制备单元2b、循环灰溶液制备单元2c和溶液输送单元2d组成,由钠基脱硫剂溶液制备单元2b制备的Na2CO3溶液通过溶液输送单元2d输送至脱硫塔2a顶部的顶罐2f,然后钠基脱硫剂溶液自流进入雾化器2g,雾化器2g将钠基脱硫剂溶液雾化成50~100μm微粒;2) The desulfurization system is composed of a desulfurization tower 2a, a sodium-based desulfurizer solution preparation unit 2b, a circulating ash solution preparation unit 2c, and a solution delivery unit 2d, and the Na 2 CO 3 solution prepared by the sodium-based desulfurizer solution preparation unit 2b is transported through the solution. The unit 2d is sent to the top tank 2f at the top of the desulfurization tower 2a, and then the sodium-based desulfurizer solution flows into the atomizer 2g, and the atomizer 2g atomizes the sodium-based desulfurizer solution into 50-100 μm particles;
3)通过脱硫塔2a顶部的烟道气分配器2e使焦炉烟道气气流在脱硫塔2a内均匀分布,焦炉烟道气与雾化后的钠基脱硫剂微粒在脱硫塔2a内充分混合,SO2与钠基脱硫剂微粒发生物理化学反应,生成亚硫酸钠及硫酸钠,
脱除焦炉烟道气中的SO2,粉状亚硫酸钠及硫酸钠随脱硫后的烟道气进入除尘脱硝系统;3) The flue gas stream of the coke oven is uniformly distributed in the desulfurization tower 2a through the flue gas distributor 2e at the top of the desulfurization tower 2a, and the coke oven flue gas and the atomized sodium-based desulfurizer particles are sufficiently contained in the desulfurization tower 2a. Mixing, SO 2 reacts with sodium-based desulfurizer particles to form sodium sulfite and sodium sulfate, removes SO 2 from the coke oven flue gas, and powdered sodium sulfite and sodium sulfate enters the dust removal and denitration system with the desulfurized flue gas. ;
4)除尘脱硝系统设有除尘脱硝一体化设备3a、氨气稀释风机3b、氨气-烟道气混合器3c和脱硫灰收集输送设备3d;烟道气首先进入除尘脱硝一体化设备3a的滤袋净化功能段3f,烟道气中的粉尘被阻隔在滤袋之外并附着在滤袋表面,同时滤袋阻力层的均压作用使烟道气在过滤层截面上均布;4) The dust removal and denitration system is provided with a dust removal and denitrification integrated device 3a, an ammonia gas dilution fan 3b, an ammonia gas-flue gas mixer 3c and a desulfurization ash collection and transportation device 3d; the flue gas first enters the dust removal and denitration integrated device 3a. The bag purifying function section 3f, the dust in the flue gas is blocked outside the filter bag and attached to the surface of the filter bag, and the pressure equalization effect of the filter bag resistance layer makes the flue gas uniformly distributed on the cross section of the filter layer;
5)过滤后的烟道气经过混合热解再生段3g时与喷入的氨气混合,然后进入脱硝催化剂功能段3h,烟道气中的NOx在脱硝催化剂作用下被氨气还原成N2;5) The filtered flue gas through 3g mixing ammonia gas is mixed with the pyrolysis of sprayed into the regeneration zone and then enters the denitration catalyst functional segments 3h, NO x in the flue gas is reduced in ammonia denitration catalyst into N 2 ;
6)经过除尘脱硝后的烟道气从除尘脱硝一体化设备3a顶部流出,经过引风机1a、送风电动阀1c回送至焦炉烟道6,通过焦炉烟囱7外排;6) After the dust removal and denitration, the flue gas flows out from the top of the dust removal and denitration integrated device 3a, and is sent back to the coke oven flue 6 through the induced draft fan 1a and the air supply electric valve 1c, and is discharged through the coke oven chimney 7;
7)在除尘脱硝一体化设备3a中被过滤下来的烟道气中的颗粒物以及脱硫生成的反应物,通过脱硫灰收集输送设备3d输送至脱硫系统中的循环灰溶液制备单元2c,配制成循环灰溶液后经溶液输送单元2d输送至脱硫塔2a顶部的顶罐2f,参与焦炉烟道气脱硫过程,使未反应的钠基脱硫剂得到充分利用。7) The particulate matter in the flue gas filtered in the dedusting and denitrification integrated device 3a and the reactant generated by the desulfurization are transported to the circulating ash solution preparation unit 2c in the desulfurization system through the desulfurization ash collection and transport device 3d, and are configured into a cycle. The ash solution is then sent to the top tank 2f at the top of the desulfurization tower 2a via the solution transport unit 2d to participate in the coke oven flue gas desulfurization process, so that the unreacted sodium-based desulfurizing agent is fully utilized.
在除尘脱硝系统中,来自焦化厂蒸氨工段产生的剩余氨水或购买的液氨蒸发的氨气在氨气-烟道气混合器3c内与氨气稀释风机3b抽取的净化后烟道气混合稀释后送入除尘脱硝一体化设备3a中进行脱硝反应。In the dust removal and denitration system, the residual ammonia water generated from the steaming plant of the coking plant or the ammonia vapor evaporated by the purchased liquid ammonia is mixed with the purified flue gas extracted by the ammonia dilution fan 3b in the ammonia gas-flue gas mixer 3c. After dilution, it is sent to the dust removal and denitration integrated device 3a for denitration reaction.
燃气热风炉3e定期将高温热解气体送入除尘脱硝一体化设备3a中的混合热解再生段3g,促使脱硝催化剂再生。The gas hot blast stove 3e periodically sends the high temperature pyrolysis gas to the mixed pyrolysis regeneration section 3g in the dust removal and denitration integrated equipment 3a to promote the regeneration of the denitration catalyst.
用于实现一种焦炉烟道气脱硫脱硝联合净化装置,包括脱硫塔2a和除尘脱硝一体化设备3a,除尘脱硝一体化设备3a自下而上设有滤袋净化功能段3f、混合热解再生段3g和脱硝催化剂功能段3h;从焦炉烟道6引出的烟道气管道1d依次连接脱硫塔2a和除尘脱硝一体化设备3a形成烟道气循环净化系统,除尘脱硝一体化设备3a连接焦炉烟道6的烟道气管道1d上设有配备变频电机的引风机1a;脱硫塔2a顶部的雾化器2g与顶罐2f连接,并通过溶液输送单元2d分别连接钠基脱硫剂溶液制备单元2b和循环灰溶液制备单元2c,循环灰溶液制备单元2c通过脱硫灰收集输送设备3d连接除尘脱硝一体化设备3a的底部灰仓。
It is used to realize a coke oven flue gas desulfurization and denitration combined purification device, comprising a desulfurization tower 2a and a dust removal and denitrification integrated device 3a, and a dust removal and denitration integrated device 3a is provided with a filter bag purification function section 3f from the bottom to the top, and a mixed pyrolysis The regeneration section 3g and the denitration catalyst functional section 3h; the flue gas pipeline 1d drawn from the coke oven flue 6 is sequentially connected to the desulfurization tower 2a and the dust removal and denitration integrated equipment 3a to form a flue gas circulation purification system, and the dust removal and denitration integrated equipment 3a is connected. The flue gas duct 1d of the coke oven flue 6 is provided with an induced draft fan 1a equipped with a variable frequency motor; the atomizer 2g at the top of the desulfurization tower 2a is connected with the top tank 2f, and the sodium-based desulfurizer solution is respectively connected through the solution transport unit 2d. The preparation unit 2b and the circulating ash solution preparation unit 2c, the circulating ash solution preparation unit 2c is connected to the bottom ash silo of the dust removal and denitration integrated device 3a through the desulfurization ash collection and transport device 3d.
具体地,在本发明的实施例中,除尘脱硝一体化设备中的滤袋净化功能段3f包括灰仓、密闭卸灰阀、烟道气入口、气流均布导流板、滤袋和脉冲喷吹装置;灰仓位于除尘脱硝一体化设备的滤袋净化功能段下方,密闭卸灰阀安装在灰仓出料口处;烟道气入口设置在脱硫集尘净化滤袋净化功能段上部的侧壁上,多排滤袋垂直嵌挂于花板孔内,且沿纵向均布,气流均布导流板设置在烟道气入口与滤袋之间,滤袋上部设脉冲喷吹装置。其中,灰仓用于收集并贮存从烟道气中分离出来的颗粒物,密闭卸灰阀的一个作用是防止外部空气通过出料口渗入装置内部降低烟道气温度,另一个作用是排放灰仓收集的粉尘颗粒物。Specifically, in the embodiment of the present invention, the filter bag purifying function section 3f in the dust removal and denitration integrated device includes a ash silo, a closed ash discharge valve, a flue gas inlet, a gas flow uniform baffle, a filter bag, and a pulse spray. Blowing device; the ash bin is located below the filter bag purifying function section of the dust removal and denitrification integrated equipment, and the closed ash discharging valve is installed at the ash silo discharge port; the flue gas inlet is arranged at the upper side of the desulfurizing dust collecting and purifying filter bag purifying function section On the wall, the multi-row filter bags are vertically embedded in the flower plate holes, and are evenly distributed along the longitudinal direction. The air flow uniform baffles are disposed between the flue gas inlet and the filter bag, and the upper part of the filter bag is provided with a pulse blowing device. Among them, the ash silo is used to collect and store the particulate matter separated from the flue gas. One function of the closed ash discharge valve is to prevent the outside air from penetrating into the device through the discharge port to reduce the temperature of the flue gas, and the other function is to discharge the ash silo. Dust particles collected.
滤袋净化功能段3f上部包括烟道气入口、气流均布导流板、滤袋、脉冲喷吹装置。烟道气入口设置在滤袋净化功能段上方的侧面塔体上,多排滤袋垂直嵌挂于滤袋净化功能段花板孔内,且沿纵向均布,气流均布导流板设置在烟道气入口与滤袋之间。气流均布导流板为角形钢板组成的迷宫型结构,可对尘气中所含粗颗粒煤粉进行粗分离,同时对含尘烟道气进行导流,使滤袋表面的气流分布均匀,避免含尘气体直接冲刷滤袋表面,影响滤袋使用效率及使用寿命。脉冲喷吹装置设置在滤袋上部净气区域内,用于对滤袋进行脉冲反吹清灰。The upper part of the filter bag purifying function section 3f includes a flue gas inlet, a gas flow uniform baffle, a filter bag, and a pulse blowing device. The flue gas inlet is arranged on the side tower body above the filter bag purifying function section, and the multi-row filter bag is vertically embedded in the filter bag purifying function segment flower plate hole, and is evenly distributed along the longitudinal direction, and the airflow uniform baffle is arranged at Between the flue gas inlet and the filter bag. The airflow uniform baffle is a labyrinth structure composed of angled steel plates, which can coarsely separate the coarse pulverized coal powder contained in the dust gas, and at the same time conduct diversion of the dusty flue gas to make the airflow distribution on the surface of the filter bag uniform and avoid The dust-containing gas directly washes the surface of the filter bag, which affects the efficiency and service life of the filter bag. The pulse blowing device is arranged in the clean air area of the upper part of the filter bag for pulse backflushing and cleaning the filter bag.
混合热解再生段3g包括喷氨结构体、热解气体输送喷射结构体、混合均流结构体。热解气体输送喷射结构体由多条平行设置的送风管道组成,每条送风管道上均设风量调节阀,位于塔内的送风管道上均布孔板送风口;喷氨结构体设置在热解气体输送喷射结构体上方,由多条平行设置的喷氨管道组成,每条喷氨管道上均设有喷氨调节阀,喷氨管道上均布氨喷射口;混合均流结构体设置在喷氨结构体上方,由1~4层呈弧形波纹或角型波纹形状的多孔板组成,且相邻两层之间按波纹方向相隔90°角交错布置。另外,脱硝催化剂功能段3h包括脱硝催化剂和净化烟道气出口,脱硝催化剂按2~4层设置,净化烟道气出口设置在除尘脱硝一体化设备顶部。The mixed pyrolysis regeneration section 3g includes an ammonia spray structure, a pyrolysis gas transport injection structure, and a mixed current sharing structure. The pyrolysis gas conveying injection structure body is composed of a plurality of air supply ducts arranged in parallel, and each air supply duct is provided with an air volume regulating valve, and the air supply ducts are arranged on the air supply ducts in the tower; the ammonia spray structure is arranged Above the pyrolysis gas conveying injection structure, a plurality of parallel spraying ammonia pipelines are arranged, each of the ammonia spraying pipelines is provided with an ammonia spraying regulating valve, and the ammonia spraying pipeline is uniformly distributed with an ammonia injection port; the mixed current sharing structure It is arranged above the ammonia spraying structure, and is composed of 1 to 4 layers of porous plates having an arc-shaped corrugation or an angular corrugation shape, and the adjacent two layers are staggered at an angle of 90° in the corrugation direction. In addition, the denitration catalyst functional section 3h includes a denitration catalyst and a purified flue gas outlet, the denitration catalyst is arranged in layers 2 to 4, and the purified flue gas outlet is disposed at the top of the dust removal and denitration integrated device.
焦炉烟道6与脱硫塔2a之间的烟道气管道1d上设有取风电动调节阀1b,引风机1a与焦炉烟道6之间的烟道气管道1d上设送风电动阀1c。
A wind electric control valve 1b is arranged on the flue gas duct 1d between the coke oven flue 6 and the desulfurization tower 2a, and a flue gas electric valve is arranged on the flue gas duct 1d between the draft fan 1a and the coke oven flue 6. 1c.
除尘脱硝一体化设备3a的氨气输送管道上设有氨气-烟道气混合器3c,氨气-烟道气混合器3c的氨气入口连接氨气外线5,烟道气入口通过氨气稀释风机3b连接引风机1a后的烟道气管道1d(沿烟道气输送方向)。The ammonia gas transmission pipe of the dust removal and denitration integrated device 3a is provided with an ammonia gas-flue gas mixer 3c, the ammonia gas inlet of the ammonia gas-flue gas mixer 3c is connected to the ammonia gas outer line 5, and the flue gas inlet is passed through the ammonia gas. The dilution fan 3b is connected to the flue gas duct 1d (in the direction of flue gas transport) after the draft fan 1a.
钠基脱硫剂溶液制备单元2b和循环灰溶液制备单元2c另外连接蒸汽、工艺水单元4b。The sodium-based desulfurizing agent solution preparation unit 2b and the circulating ash solution preparation unit 2c are additionally connected to the steam, process water unit 4b.
脱硫塔2a顶部设有烟道气分配器2e。A flue gas distributor 2e is provided at the top of the desulfurization tower 2a.
除尘脱硝一体化设备3a中的滤袋采用脉冲反吹清灰,其压缩空气管道连接外部的压缩空气单元4a;除尘脱硝一体化设备混合热解再生段3g中的热解气体输送管道连接外部的燃气热风炉3e。The filter bag in the dust removal and denitrification integrated device 3a adopts pulse backflushing and cleaning, and the compressed air pipe is connected to the external compressed air unit 4a; the pyrolysis gas delivery pipe in the mixed pyrolysis regeneration section 3g of the dust removal and denitration integrated device is connected to the external Gas hot blast stove 3e.
基于上述焦炉烟道气脱硫脱硝联合净化的具体工艺流程,本发明还提供一种焦炉烟道气脱硫脱硝联合净化装置包括引风系统、脱硫系统、除尘脱硝系统及公辅系统,焦炉烟道气循环净化,焦炉烟道气的流动路径为焦炉烟道6→脱硫塔2a→除尘脱硝一体化设备3a→引风机1a→焦炉烟道6→焦炉烟囱7→外排。Based on the specific process flow of the above-mentioned coke oven flue gas desulfurization and denitrification combined purification, the present invention also provides a coke oven flue gas desulfurization and denitration combined purification device including an air intake system, a desulfurization system, a dust removal and denitration system, and a public auxiliary system, a coke oven Flue gas circulation purification, coke oven flue gas flow path is coke oven flue 6 → desulfurization tower 2a → dust removal and denitrification integrated equipment 3a → induced draft fan 1a → coke oven flue 6 → coke oven chimney 7 → outer row.
引风系统包括烟道气管道1d、设置在烟道气管道1d上的引风机1a、取风电动调节阀1b和送风电动阀1c,用于吸引并回送焦炉烟道气,为焦炉烟道气循环净化提供动力;引风机1a安装在焦炉烟道气循环净化系统的末端,脱硫塔2a和除尘脱硝一体化设备3a处于负压运行状态。引风机1a配有变频电机或耦合器或永磁调速器,通过对引风机1a进行调速、调节取风电动调节阀1b,可以保证焦炉正常生产所需要的负压值,也可以保证脱硫及除尘脱硝系统正常工作所需要的压力值。The air intake system includes a flue gas duct 1d, an induced draft fan 1a disposed on the flue gas duct 1d, a wind electric control valve 1b, and a blower electric valve 1c for attracting and returning the coke oven flue gas, which is a coke oven The flue gas circulation purification provides power; the induced draft fan 1a is installed at the end of the coke oven flue gas circulation purification system, and the desulfurization tower 2a and the dust removal and denitration integrated device 3a are in a negative pressure operation state. The induced draft fan 1a is equipped with a variable frequency motor or a coupler or a permanent magnet governor. By adjusting the induced draft fan 1a and adjusting the take-up electric control valve 1b, the negative pressure value required for the normal production of the coke oven can be ensured. The pressure value required for the normal operation of the desulfurization and dedusting and denitration system.
脱硫系统包括脱硫塔2a、钠基脱硫剂溶液制备单元2b、循环灰溶液制备单元2c和溶液输送单元2d,用于脱除焦炉烟道气中的SO2;脱硫塔2a顶部设焦炉烟道气入口、雾化器2g、顶罐2f和烟道气分配器2e,顶罐2f的出液口连接雾化器2g,进液口连接钠基脱硫剂溶液制备单元2b和循环灰溶液制备单元2c。The desulfurization system comprises a desulfurization tower 2a, a sodium-based desulfurizer solution preparation unit 2b, a circulating ash solution preparation unit 2c and a solution delivery unit 2d for removing SO 2 from the coke oven flue gas; the desulfurization tower 2a is provided with a coke oven smoke The gas inlet, the atomizer 2g, the top tank 2f and the flue gas distributor 2e, the liquid outlet of the top tank 2f is connected to the atomizer 2g, the liquid inlet is connected to the sodium-based desulfurizer solution preparation unit 2b, and the circulating ash solution is prepared. Unit 2c.
钠基脱硫剂溶液制备单元2b设有钠基脱硫剂储仓、变频卸料阀、称重给料机、配液罐、溶液罐、加热水箱,用以制备一定浓度的钠基脱硫剂溶液,供焦炉烟道气脱硫使用。循环灰溶液制备单元2c设有脱硫灰仓、变频卸料阀、定频卸料阀、称重给料机、循环灰溶液罐,用以将收集的脱硫灰配制成溶液,
重复利用其中的钠基脱硫剂后再外排。溶液输送单元2d设有钠基脱硫剂溶液泵、循环灰溶液泵及溶液输送管道、阀门,用以将配制合格的钠基脱硫剂溶液和循环灰溶液输送至脱硫塔2a顶部的顶罐2f中。The sodium-based desulfurizer solution preparation unit 2b is provided with a sodium-based desulfurizer storage bin, a variable frequency discharge valve, a weighing feeder, a liquid distribution tank, a solution tank, and a heating water tank for preparing a certain concentration of sodium-based desulfurizer solution. Used for desulfurization of coke oven flue gas. The circulating ash solution preparation unit 2c is provided with a desulfurization ash silo, a frequency conversion discharge valve, a fixed frequency discharge valve, a weighing feeder, and a circulating ash solution tank for formulating the collected desulfurization ash into a solution.
The sodium-based desulfurizing agent is reused and then discharged. The solution conveying unit 2d is provided with a sodium-based desulfurizing agent solution pump, a circulating ash solution pump, a solution conveying pipe, and a valve for conveying the formulated sodium-based desulfurizing agent solution and the circulating ash solution to the top tank 2f at the top of the desulfurization tower 2a. .
脱硫塔2a的下部设烟道气出口,底部设锥形灰斗,灰斗出口设有锁气卸料阀;脱硫灰收集输送设备3d包括刮板机和斗提机,用以将除尘脱硝一体化设备2a排放的脱硫灰输送至脱硫系统的循环灰溶液制备单元2c。The lower part of the desulfurization tower 2a is provided with a flue gas outlet, the bottom is provided with a cone ash hopper, and the ash hopper outlet is provided with a lock gas discharge valve; the desulfurization ash collection and transportation equipment 3d comprises a scraper and a bucket lifter for dedusting and denitrification. The desulfurized ash discharged from the chemical plant 2a is sent to the circulating ash solution preparation unit 2c of the desulfurization system.
除尘脱硝系统包括除尘脱硝一体化设备3a、氨气稀释风机3b、氨气-烟道气混合器3c、脱硫灰收集输送设备3d和燃气热风炉3e;脱硫后的烟道气在除尘脱硝一体化设备3a内先过滤除尘,然后与经过稀释的氨气混合,进入催化剂层;烟道气中的NOX在催化剂作用下与氨气反应,NOX被还原生成氮气。The dust removal and denitration system includes dust removal and denitrification integrated equipment 3a, ammonia dilution fan 3b, ammonia gas-flue gas mixer 3c, desulfurization ash collection and transportation equipment 3d and gas hot air furnace 3e; flue gas after desulfurization is integrated in dust removal and denitration the first filter unit 3a dust, and then mixed with the diluted ammonia gas, into the catalyst layer; NO X in the flue gas is reacted with ammonia over a catalyst, NO X is reduced to produce nitrogen gas.
除尘脱硝一体化设备3a具有颗粒物净化功能,烟道气首先与滤袋接触,阻止粉尘进入脱硝层,同时利用滤袋阻力层的均压作用,实现烟道气在过滤层截面上的均布;未反应的钠基脱硫剂被阻隔附着在滤袋外表面,与烟道气中的SO2继续反应,进一步提高脱硫效率。The dust removal and denitrification integrated device 3a has a particulate matter purifying function, and the flue gas first contacts the filter bag to prevent the dust from entering the denitration layer, and at the same time, the uniform pressure of the filter bag resistance layer is used to realize the uniform distribution of the flue gas on the cross section of the filter layer; The unreacted sodium-based desulfurizing agent is blocked from adhering to the outer surface of the filter bag, and continues to react with SO 2 in the flue gas to further improve the desulfurization efficiency.
公辅系统包括压缩空气单元4a和蒸汽、工艺水单元4b,压缩空气用于滤袋脉冲清灰;蒸汽和工艺水用以配制钠基脱硫剂溶液和循环灰溶液;部分工艺水用于脱硫系统的冷却和反冲洗。The public auxiliary system includes a compressed air unit 4a and steam, a process water unit 4b, compressed air for filter bag pulse cleaning, steam and process water for formulating a sodium-based desulfurizer solution and a circulating ash solution; and part of the process water for the desulfurization system Cooling and backwashing.
本发明提供的焦炉烟道气脱硫脱硝联合净化装置及烟道气管道均设有保温材料,保证系统温降低,满足焦炉烟囱7外排温度要求。The coke oven flue gas desulfurization and denitration combined purification device and the flue gas pipeline provided by the invention are provided with thermal insulation materials to ensure the system temperature is lowered, and the temperature requirements of the coke oven chimney 7 are discharged.
通过上述实施方式可以看出,本发明提供的焦炉烟道气脱硫脱硝联合净化工艺及装置,采用旋转喷雾干燥法脱硫与低温SCR脱硝相结合,实现对焦炉烟道气的高效脱硫脱硝,且工艺过程简单,占地面积小,设备投资少。It can be seen from the above embodiments that the coke oven flue gas desulfurization and denitration combined purification process and device provided by the invention combines desulfurization by rotary spray drying with desulfurization of low temperature SCR to realize high-efficiency desulfurization and denitrification of the flue gas of the coke oven. The process is simple, the floor space is small, and the equipment investment is small.
如上参照附图以示例的方式描述了根据本发明提出的焦炉烟道气脱硫脱硝联合净化工艺及装置。但是,本领域技术人员应当理解,对于上述本发明所提出的焦炉烟道气脱硫脱硝联合净化工艺及装置,还可以在不脱离本发明内容的基础上做出各种改进。因此,本发明的保护范围应当由所附的权利要求书的内容确定。
The coke oven flue gas desulfurization and denitration combined purification process and apparatus according to the present invention are described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various improvements can be made to the coke oven flue gas desulfurization and denitration combined purification process and apparatus proposed by the present invention without departing from the scope of the present invention. Therefore, the scope of the invention should be determined by the content of the appended claims.
Claims (20)
- 一种焦炉烟道气脱硫脱硝联合净化工艺,包括如下步骤:A coke oven flue gas desulfurization and denitration combined purification process comprises the following steps:在脱硫系统中,对焦炉烟道气进行旋转喷雾半干法低温降脱硫;In the desulfurization system, the coke oven flue gas is subjected to rotary spray semi-dry method to reduce desulfurization at a low temperature;在除尘脱硝系统中,对颗粒物进行除尘过滤;并且利用选择性催化还原法,对经过低温降脱硫和除尘过滤的焦炉烟道气在除尘脱硝一体化设备中进行脱硝;以及,In the dust removal and denitration system, the particulate matter is subjected to dust filtration; and the selective catalytic reduction method is used to denitrate the coke oven flue gas which has undergone low temperature desulfurization and dust removal filtration in the dust removal and denitration integrated device;将脱硝后的烟道气回送至焦炉烟道,通过焦炉烟囱外排。The flue gas after denitration is sent back to the coke oven flue and discharged through the coke oven chimney.
- 根据权利要求1所述的焦炉烟道气脱硫脱硝联合净化工艺,其特征在于,所述旋转喷雾半干法低温降脱硫的过程包括:The coke oven flue gas desulfurization and denitration combined purification process according to claim 1, wherein the rotary spray semi-dry process low temperature desulfurization process comprises:焦炉烟道气在引风机作用下,从焦炉烟囱根部的焦炉烟道吸出,通过烟道气管道输送进入脱硫系统;其中,所述脱硫系统由脱硫塔、钠基脱硫剂溶液制备单元、循环灰溶液制备单元和溶液输送单元组成;The coke oven flue gas is sucked out from the coke oven flue at the root of the coke oven chimney by the induced draft fan, and is transported into the desulfurization system through the flue gas pipeline; wherein the desulfurization system is prepared by a desulfurization tower and a sodium-based desulfurizer solution preparation unit. , a circulating ash solution preparation unit and a solution delivery unit;在脱硫系统中,将通过溶液输送单元输送至脱硫塔顶罐的钠基脱硫剂溶液用雾化器雾化成50~100μm的钠基脱硫剂微粒;In the desulfurization system, the sodium-based desulfurizer solution delivered to the top tank of the desulfurization tower through the solution transport unit is atomized into a sodium-based desulfurizer particle of 50-100 μm by an atomizer;通过脱硫塔顶部的烟道气分配器使焦炉烟道气气流在所述脱硫塔内均匀分布,与雾化后的所述钠基脱硫剂微粒在所述脱硫塔内充分反应,生成亚硫酸钠及硫酸钠,从而脱除焦炉烟道气中的SO2,粉状亚硫酸钠随焦炉烟道气脱硫后的烟道气进入除尘脱硝系统。The coke oven flue gas stream is evenly distributed in the desulfurization tower through a flue gas distributor at the top of the desulfurization tower, and the atomized sodium-based desulfurizer particles are fully reacted in the desulfurization tower to form sodium sulfite and Sodium sulfate is used to remove SO 2 from the flue gas of the coke oven, and the flue gas of the sodium sulfite desulfurization with the flue gas of the coke oven enters the dust removal and denitration system.
- 根据权利要求2所述的焦炉烟道气脱硫脱硝联合净化工艺,其特征在于,所述对颗粒物进行除尘过滤的过程包括:The coke oven flue gas desulfurization and denitration combined purification process according to claim 2, wherein the process of dust removal and filtration of the particulate matter comprises:所述除尘脱硝系统设有除尘滤袋、脱硫灰收集输送设备,烟道气首先进入除尘脱硝一体化设备的滤袋净化功能段,烟道气中的粉尘被阻隔在滤袋之外并附着在滤袋表面,同时滤袋阻力层的均压作用使烟道气在过滤层截面上均布。The dust removal and denitration system is provided with a dust filter bag and a desulfurization ash collection and transportation device. The flue gas first enters the filter bag purification function section of the dust removal and denitration integrated device, and the dust in the flue gas is blocked outside the filter bag and attached to the filter bag. The surface of the filter bag, while the pressure equalization of the filter bag resistance layer, allows the flue gas to be evenly distributed across the cross section of the filter layer.
- 根据权利要求1所述的焦炉烟道气脱硫脱硝联合净化工艺,其特征在于,所述利用选择性催化还原法,对经过低温降脱硫和除尘过滤的焦炉烟道气进行脱硝的过程包括:The coke oven flue gas desulfurization and denitration combined purification process according to claim 1, wherein the process of denitrification of the coke oven flue gas subjected to low temperature desulfurization and dust removal filtration by the selective catalytic reduction method comprises :过滤后的烟道气经过混合热解再生段时与喷入的氨气混合,然后进入脱硝催化剂功能段,烟道气中的NOx在脱硝催化剂作用下被氨气还原成N2。 The filtered flue gas through a regenerative pyrolysis mixing section mixing with the injected ammonia, before entering the denitration catalyst functional segments, NO x in the flue gas is reduced to N 2 in the ammonia catalyst denitration.
- 根据权利要求3所述的焦炉烟道气脱硫脱硝联合净化工艺,其特征在于,The coke oven flue gas desulfurization and denitration combined purification process according to claim 3, wherein在所述除尘脱硝一体化设备中被过滤下来的烟道气中的颗粒物以及脱硫生成的反应物,通过所述脱硫灰收集输送设备输送至所述循环灰溶液制备单元,配制成循环灰溶液后经所述溶液输送单元输送至所述脱硫塔顶部的顶罐,参与焦炉烟道气脱硫过程,使未反应的钠基脱硫剂得到充分利用。The particulate matter in the flue gas filtered in the dust removal and denitration integrated device and the reactant formed by the desulfurization are transported to the circulating ash solution preparation unit through the desulfurization ash collection and conveying device, and are formulated into a circulating ash solution. The top tank which is sent to the top of the desulfurization tower through the solution conveying unit participates in the desulfurization process of the coke oven flue gas, so that the unreacted sodium-based desulfurizing agent is fully utilized.
- 根据权利要求3所述的焦炉烟道气脱硫脱硝联合净化工艺,其特征在于,在所述除尘脱硝系统中,氨气在所述氨气-烟道气混合器内与氨气稀释风机抽取的净化后烟道气混合稀释后送入所述除尘脱硝一体化设备中进行脱硝反应。The coke oven flue gas desulfurization and denitration combined purification process according to claim 3, wherein in the dust removal and denitration system, ammonia gas is extracted in the ammonia gas-flue gas mixer and the ammonia gas dilution fan After the purification, the flue gas is mixed and diluted, and then sent to the dust removal and denitration integrated device for denitration reaction.
- 根据权利要求3所述的焦炉烟道气脱硫脱硝联合净化工艺,其特征在于,所述燃气热风炉定期将高温热解气体送入所述除尘脱硝一体化设备中的混合热解再生段,促使脱硝催化剂再生。The coke oven flue gas desulfurization and denitration combined purification process according to claim 3, wherein the gas hot blast stove periodically sends the high temperature pyrolysis gas to the mixed pyrolysis regeneration section in the dust removal and denitration integrated device. Promote regeneration of the denitration catalyst.
- 一种焦炉烟道气脱硫脱硝联合净化装置,其特征在于,包括:引风系统、脱硫系统和除尘脱硝系统,其中,The utility model relates to a coke oven flue gas desulfurization and denitration combined purification device, which comprises: an air introduction system, a desulfurization system and a dust removal and denitration system, wherein所述引风系统,用于吸引并回送焦炉烟道气,为焦炉烟道气循环净化提供动力;The air guiding system is configured to attract and return the coke oven flue gas to provide power for the coke oven flue gas circulation purification;所述脱硫系统,用于脱除焦炉烟道气中的SO2;The desulfurization system is used for removing SO 2 from the flue gas of the coke oven;所述除尘脱硝系统,用于对脱硫后的烟道气先除尘,然后将除尘后的烟道气进行脱硝处理。The dust removal and denitration system is used for dedusting the flue gas after desulfurization, and then denitrifying the flue gas after dedusting.
- 根据权利要求8所述的焦炉烟道气脱硫脱硝联合净化装置,其特征在于,The coke oven flue gas desulfurization and denitration combined purification device according to claim 8, wherein所述引风系统包括烟道气管道、设置在所述烟道气管道上的引风机、设置在所述焦炉烟道与脱硫塔之间的烟道气管道上的取风电动调节阀,设置在所述引风机与焦炉烟道之间的烟道气管道上的送风电动阀;其中,The air guiding system includes a flue gas duct, an induced draft fan disposed on the flue gas duct, and a wind electric regulating valve disposed on the flue gas duct between the coke oven flue and the desulfurization tower, and is disposed at a blower electric valve on the flue gas duct between the induced draft fan and the coke oven flue; wherein所述引风机配备有变频电机或耦合器或永磁调速器,通过对所述引风机进行调速、调节所述取风电动调节阀,为所述脱硫系统及除尘脱硝系统提供所正常工作所需要的压力。The induced draft fan is equipped with a variable frequency motor or a coupler or a permanent magnet governor, and provides normal operation for the desulfurization system and the dust removal and denitration system by adjusting the induced draft fan and adjusting the air intake electric regulating valve. The pressure required.
- 根据权利要求8所述的焦炉烟道气脱硫脱硝联合净化装置,其特征在于, The coke oven flue gas desulfurization and denitration combined purification device according to claim 8, wherein所述脱硫系统包括脱硫塔、钠基脱硫剂溶液制备单元、循环灰溶液制备单元和溶液输送单元;其中,The desulfurization system includes a desulfurization tower, a sodium-based desulfurizer solution preparation unit, a circulating ash solution preparation unit, and a solution delivery unit; wherein在所述脱硫塔的顶部设有焦炉烟道气入口、雾化器、顶罐和烟道气分配器,在所述顶罐的出液口连接所述雾化器,所述顶罐的进液口连接所述钠基脱硫剂溶液制备单元和所述循环灰溶液制备单元。Providing a coke oven flue gas inlet, an atomizer, a top tank and a flue gas distributor at a top of the desulfurization tower, and connecting the atomizer to a liquid outlet of the top tank, the top tank The liquid inlet is connected to the sodium-based desulfurizer solution preparation unit and the circulating ash solution preparation unit.
- 根据权利要求10所述的焦炉烟道气脱硫脱硝联合净化装置,其特征在于,The coke oven flue gas desulfurization and denitration combined purification device according to claim 10, wherein所述钠基脱硫剂溶液制备单元包括钠基脱硫剂储仓、变频卸料阀、称重给料机、配液罐、溶液罐和加热水箱;并且,The sodium-based desulfurizer solution preparation unit includes a sodium-based desulfurizer storage tank, a variable frequency discharge valve, a weighing feeder, a liquid distribution tank, a solution tank, and a heating water tank;用于制备钠基脱硫剂溶液,以供焦炉烟道气脱硫使用。It is used to prepare sodium-based desulfurizer solution for desulfurization of coke oven flue gas.
- 根据权利要求10所述的焦炉烟道气脱硫脱硝联合净化装置,其特征在于,The coke oven flue gas desulfurization and denitration combined purification device according to claim 10, wherein所述循环灰溶液制备单元包括脱硫灰仓、变频卸料阀、定频卸料阀、称重给料机、循环灰溶液罐;并且,用于将收集的脱硫灰配制成溶液,重复利用其中的钠基脱硫剂后再外排。The circulating ash solution preparation unit comprises a desulfurization ash silo, a variable frequency discharge valve, a fixed frequency discharge valve, a weighing feeder, a circulating ash solution tank; and, for formulating the collected desulfurization ash into a solution, and recycling the same The sodium-based desulfurizing agent is then discharged.
- 根据权利要求10所述的焦炉烟道气脱硫脱硝联合净化装置,其特征在于,The coke oven flue gas desulfurization and denitration combined purification device according to claim 10, wherein所述溶液输送单元包括钠基脱硫剂溶液泵、循环灰溶液泵及溶液输送管道、阀门;并且,用于将配制合格的钠基脱硫剂溶液和循环灰溶液输送至所述顶罐。The solution delivery unit includes a sodium-based desulfurizer solution pump, a circulating ash solution pump and a solution delivery conduit, and a valve; and is configured to deliver the formulated sodium-based desulfurizer solution and the circulating ash solution to the top tank.
- 根据权利要求10所述的焦炉烟道气脱硫脱硝联合净化装置,其特征在于,The coke oven flue gas desulfurization and denitration combined purification device according to claim 10, wherein所述除尘脱硝系统包括除尘脱硝一体化设备、氨气稀释风机、氨气-烟道气混合器和脱硫灰收集输送设备;The dust removal and denitration system comprises an integrated dust removal and denitration device, an ammonia dilution fan, an ammonia gas-flue gas mixer and a desulfurization ash collection and transportation device;所述除尘脱硝一体化设备自下而上包括滤袋净化功能段、混合热解再生段和脱硝催化剂功能段;The dust removal and denitration integrated device comprises a filter bag purification function section, a mixed pyrolysis regeneration section and a denitration catalyst functional section from bottom to top;从焦炉烟道引出的烟道气管道依次连接所述脱硫塔和所述除尘脱硝一体化设备;所述除尘脱硝一体化设备连接所述引风机;脱硫塔顶部的雾化器与顶罐连接,并通过所述溶液输送单元分别连接所述钠基脱硫剂溶液制备单元和循环灰溶液制备单元,所述循环灰溶液制备单元通过脱硫灰收集输送设备 连接除尘脱硝一体化设备的底部灰仓。a flue gas pipeline leading from the coke oven flue is connected to the desulfurization tower and the dust removal and denitration integrated device in sequence; the dust removal and denitration integrated device is connected to the induced draft fan; and the atomizer at the top of the desulfurization tower is connected with the top tank And connecting, by the solution transport unit, the sodium-based desulfurizer solution preparation unit and the circulating ash solution preparation unit, respectively, the circulating ash solution preparation unit passes through the desulfurization ash collection and transportation device Connect the bottom ash bin of the dust removal and denitrification integrated equipment.
- 根据权利要求14所述的焦炉烟道气脱硫脱硝联合净化装置,其特征在于,The coke oven flue gas desulfurization and denitration combined purification device according to claim 14, wherein所述滤袋净化功能段包括灰仓、密闭卸灰阀、烟道气入口、气流均布导流板、滤袋和脉冲喷吹装置;其中,The filter bag purification function section comprises a ash silo, a closed ash discharge valve, a flue gas inlet, a gas flow uniform baffle, a filter bag and a pulse blowing device; wherein所述灰仓设置在所述除尘脱硝一体化设备下方,所述密闭卸灰阀设置在灰仓出料口处,所述烟道气入口设置在所述滤袋净化功能段上部的侧壁上,所述滤袋垂直嵌挂于花板孔内,且沿纵向均布,所述气流均布导流板设置在所述烟道气入口与滤袋之间,所述滤袋上部设脉冲喷吹装置。The ash silo is disposed under the dust removal and denitration integrated device, the sealed ash discharge valve is disposed at a ash discharge port, and the flue gas inlet is disposed on a sidewall of the upper portion of the filter bag purification function section The filter bag is vertically embedded in the flower plate hole and is evenly distributed in the longitudinal direction, and the airflow uniform baffle is disposed between the flue gas inlet and the filter bag, and the filter bag is provided with a pulse spray Blowing device.
- 根据权利要求14所述的焦炉烟道气脱硫脱硝联合净化装置,其特征在于,The coke oven flue gas desulfurization and denitration combined purification device according to claim 14, wherein所述混合热解再生段包括喷氨结构体、热解气体输送喷射结构体、混合均流结构体;其中,The mixed pyrolysis regeneration section includes an ammonia spray structure, a pyrolysis gas transport injection structure, and a mixed current sharing structure; wherein所述热解气体输送喷射结构体包括多条平行设置的送风管道,每条送风管道上均设有风量调节阀,位于所述脱硫塔的送风管道上均布孔板送风口;The pyrolysis gas delivery injection structure comprises a plurality of air supply ducts arranged in parallel, each air supply duct is provided with an air volume regulating valve, and the air supply duct of the orifice plate is evenly distributed on the air supply duct of the desulfurization tower;所述喷氨结构体设置在所述热解气体输送喷射结构体上方,包括多条平行设置的喷氨管道,每条喷氨管道上均设有喷氨调节阀,喷氨管道上均布氨喷射口;The ammonia spraying structure is disposed above the pyrolysis gas conveying injection structure body, and comprises a plurality of parallel spraying ammonia pipelines, each of which has an ammonia spraying regulating valve, and the ammonia spraying pipeline is uniformly distributed with ammonia. Jet port所述混合均流结构体设置在所述喷氨结构体上方,由1~4层呈弧形波纹或角型波纹形状的多孔板组成,且相邻两层之间按波纹方向相隔90°角交错布置。The mixed current sharing structure is disposed above the ammonia spraying structure, and is composed of 1 to 4 layers of porous plates having a curved corrugation or an angular corrugation shape, and the adjacent two layers are separated by a 90° angle according to the corrugation direction. Staggered.
- 根据权利要求14所述的焦炉烟道气脱硫脱硝联合净化装置,其特征在于,The coke oven flue gas desulfurization and denitration combined purification device according to claim 14, wherein所述脱硝催化剂功能段包括脱硝催化剂和净化烟道气出口,所述脱硝催化剂按2~4层设置,所述净化烟道气出口设置在所述脱硫塔顶部。The denitration catalyst functional section includes a denitration catalyst and a purification flue gas outlet, the denitration catalyst is disposed in a layer of 2 to 4, and the purified flue gas outlet is disposed at the top of the desulfurization tower.
- 根据权利要求14所述的焦炉烟道气脱硫脱硝联合净化装置,其特征在于,The coke oven flue gas desulfurization and denitration combined purification device according to claim 14, wherein所述氨气-烟道气混合器设置在所述除尘脱硝一体化设备的氨气输送管道上,氨气入口连接氨气外线,烟道气入口通过氨气稀释风机连接所述引风机后的烟道气管道。 The ammonia gas-flue gas mixer is disposed on the ammonia gas transmission pipeline of the dust removal and denitration integrated device, the ammonia gas inlet is connected to the ammonia gas outer line, and the flue gas inlet is connected to the induced draft fan through the ammonia gas dilution fan. Flue gas pipeline.
- 根据权利要求14所述的焦炉烟道气脱硫脱硝联合净化装置,其特征在于,The coke oven flue gas desulfurization and denitration combined purification device according to claim 14, wherein所述除尘脱硝一体化设备中的滤袋采用脉冲反吹清灰,其压缩空气管道连接压缩空气单元;并且,The filter bag in the dust removal and denitration integrated device adopts pulse back-blowing cleaning, and the compressed air pipe is connected to the compressed air unit;所述除尘脱硝一体化设备的混合热解再生段中的热解气体输送管道连接外部的燃气热风炉。The pyrolysis gas delivery pipe in the mixed pyrolysis regeneration section of the dust removal and denitration integrated device is connected to an external gas hot air furnace.
- 根据权利要求19所述的焦炉烟道气脱硫脱硝联合净化装置,其特征在于,还包括公辅系统,其中,The coke oven flue gas desulfurization and denitration combined purification device according to claim 19, further comprising a public auxiliary system, wherein所述公辅系统包括所述压缩空气单元和蒸汽、工艺水单元;The public auxiliary system includes the compressed air unit and steam, and a process water unit;所述压缩空气单元中的压缩空气,用于滤袋脉冲清灰;The compressed air in the compressed air unit is used for pulse cleaning of the filter bag;所述蒸汽、工艺水单元中的蒸汽,用于配制钠基脱硫剂溶液和循环灰溶液;所述蒸汽、工艺水单元中的工艺水,用于配制钠基脱硫剂溶液和循环灰溶,以及对所述脱硫系统进行冷却和反冲洗。 The steam, the steam in the process water unit, is used to prepare a sodium-based desulfurizer solution and a circulating ash solution; the steam, the process water in the process water unit, is used to prepare a sodium-based desulfurizer solution and a circulating ash solution, and The desulfurization system is cooled and backwashed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020177030475A KR102003148B1 (en) | 2015-09-15 | 2016-09-14 | Integrated desulfurization and denitration of flue gas into coke oven purification process and equipment |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510586987.4 | 2015-09-15 | ||
CN201510586987.4A CN105107349A (en) | 2015-09-15 | 2015-09-15 | Coke oven flue gas desulfurization and denitrification purification process and device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017045602A1 true WO2017045602A1 (en) | 2017-03-23 |
Family
ID=54655592
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2016/098981 WO2017045602A1 (en) | 2015-09-15 | 2016-09-14 | Coke oven flue gas desulfurization and denitrification combined purification process and apparatus |
Country Status (3)
Country | Link |
---|---|
KR (1) | KR102003148B1 (en) |
CN (1) | CN105107349A (en) |
WO (1) | WO2017045602A1 (en) |
Cited By (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106994302A (en) * | 2017-05-03 | 2017-08-01 | 江苏天楹环保能源成套设备有限公司 | A kind of new and effective SCR denitration system |
CN107008144A (en) * | 2017-05-23 | 2017-08-04 | 国电科学技术研究院 | A kind of device and denitration method for flue gas for realizing SCR denitrating flue gas multistage spray ammonia |
CN108144443A (en) * | 2018-02-05 | 2018-06-12 | 山东大学 | A kind of powdered activated coke combined desulfurization and the system and method for denitration |
CN108176221A (en) * | 2017-12-28 | 2018-06-19 | 武汉都市环保工程技术股份有限公司 | Sintering flue gas heating and denitration equipment and sintering flue gas heating and denitration method |
CN108371875A (en) * | 2018-04-27 | 2018-08-07 | 马鞍山金安环境科技有限公司 | A kind of flue-gas dust-removing and desulfurization denitrification system |
CN109200800A (en) * | 2018-11-19 | 2019-01-15 | 中冶焦耐(大连)工程技术有限公司 | A kind of dry coke quenching flue-gas dust-removing and desulfurization purification device and technique |
CN109264717A (en) * | 2018-12-05 | 2019-01-25 | 诺曼利尔(青岛)环境能源技术有限公司 | Active carbon, burnt process for cleanly preparing and system |
CN109351145A (en) * | 2018-11-01 | 2019-02-19 | 唐山钢铁集团有限责任公司 | A kind of device for the operation of dense flow absorber desulphurization plant unilateral side tower |
CN109381933A (en) * | 2018-12-24 | 2019-02-26 | 永兴特种不锈钢股份有限公司 | A kind of cleaner and equipment operation method applied to steel rolling line reversable mill |
CN109432977A (en) * | 2018-12-26 | 2019-03-08 | 国电龙源节能技术有限公司 | A kind of denitration dilution wind system |
CN109569223A (en) * | 2019-01-24 | 2019-04-05 | 上海弗来应实业有限公司 | A kind of desulphurization denitration dust pelletizing system |
CN109999656A (en) * | 2019-05-07 | 2019-07-12 | 福建龙净脱硫脱硝工程有限公司 | Realize the flue gas circulating fluidized bed desulfurization of full working scope desulphurization denitration and the composite processing system and flue gas processing method of SCR denitration |
CN110064286A (en) * | 2019-04-12 | 2019-07-30 | 华电电力科学研究院有限公司 | A kind of cooling joint reducing agent of SNCR spray gun evaporates pyrolysis system and its working method |
CN110425731A (en) * | 2019-08-16 | 2019-11-08 | 北京首钢国际工程技术有限公司 | A kind of SCR denitration Smoke-heating device for wearing circumferential weld obturator |
CN111298619A (en) * | 2020-02-27 | 2020-06-19 | 四川恒泰环境技术有限责任公司 | Electric smelting furnace flue gas treatment device and method |
CN111413938A (en) * | 2020-04-16 | 2020-07-14 | 南京英璞瑞自动化科技有限公司 | SCR denitration system disturbance suppression prediction control method based on converted ammonia injection amount |
CN111450628A (en) * | 2020-03-31 | 2020-07-28 | 苏州仕净环保科技股份有限公司 | Be applicable to msw incineration waste gas dust removal SOx/NOx control integrated device |
CN111632492A (en) * | 2020-07-03 | 2020-09-08 | 福建龙净脱硫脱硝工程有限公司 | Medium and low temperature SCR denitration ammonia injection system |
CN111672288A (en) * | 2020-06-15 | 2020-09-18 | 中国联合工程有限公司 | Ammonium sulfate slurry ash removal structure and operation method |
CN111821790A (en) * | 2020-08-13 | 2020-10-27 | 佛山市尘博仕环保工程有限公司 | Conical porous high-efficiency atomizing dust-removing desulfurizing tower |
CN112156579A (en) * | 2020-09-16 | 2021-01-01 | 马鞍山市示范生产力促进中心有限公司 | Smoke-discharging and dust-removing device for electric metallurgical furnace |
CN112206643A (en) * | 2020-08-25 | 2021-01-12 | 江苏峰业科技环保集团股份有限公司 | Desulfurization and purification method of low-temperature sintering flue gas |
CN112546783A (en) * | 2020-11-10 | 2021-03-26 | 将乐三晶新材料有限公司 | Ore smelting furnace dust collector |
CN112546749A (en) * | 2020-11-20 | 2021-03-26 | 惠州市晟利科技有限公司 | Cloth bag type air supply device with filtering and dust removing functions and using method |
CN112919499A (en) * | 2021-02-02 | 2021-06-08 | 自然资源部天津海水淡化与综合利用研究所 | Method for recycling sodium bicarbonate dry-process desulfurized fly ash |
CN113617214A (en) * | 2021-08-16 | 2021-11-09 | 齐明 | High-efficient environmental protection flue gas desulfurization device |
CN113680192A (en) * | 2021-08-14 | 2021-11-23 | 江苏神舟灯饰有限公司 | Waste smoke and waste gas treatment process |
CN113817920A (en) * | 2021-10-18 | 2021-12-21 | 中冶北方(大连)工程技术有限公司 | Preparation of V from desulfurized fly ash and vanadium titano-magnetite2O5Pellet system and method |
CN113877419A (en) * | 2021-09-16 | 2022-01-04 | 上海嘉德环境能源科技有限公司 | Low-temperature flue gas desulfurization and denitrification system and method for heat accumulating type steel rolling heating furnace |
CN114470982A (en) * | 2022-03-01 | 2022-05-13 | 安徽天顺环保过滤材料有限公司 | Flue gas filters blowback formula dust removal filter bag for coal fired boiler |
CN114763909A (en) * | 2021-01-14 | 2022-07-19 | 中工国际工程股份有限公司 | Boiler system of circulating fluidized bed coupling ion waterfall |
CN114904394A (en) * | 2022-07-13 | 2022-08-16 | 北华航天工业学院 | Flue gas nitrogen oxide denitration treatment device |
CN115055042A (en) * | 2022-05-31 | 2022-09-16 | 中琉环保科技有限公司 | Desulfurizing tower capable of automatically feeding and discharging |
CN115090108A (en) * | 2022-06-17 | 2022-09-23 | 天津铁厂有限公司 | Treatment device and process for reducing nitrogen oxides in coke oven flue gas |
CN115155192A (en) * | 2022-07-08 | 2022-10-11 | 宁夏上峰萌生建材有限公司 | A purify discharging equipment for flue gas desulfurization denitration |
CN115245737A (en) * | 2021-04-25 | 2022-10-28 | 湖南天桥环境科技有限公司 | Flue gas SCR denitrification facility and flue gas processing system |
CN115889337A (en) * | 2022-12-09 | 2023-04-04 | 南京金陵石化建筑安装工程有限公司 | Flue gas denitration system of industrial boiler |
CN116036853A (en) * | 2021-10-28 | 2023-05-02 | 中国石油化工股份有限公司 | Flue gas denitration ammonia spraying mixed dust removal equipment and system |
CN116212550A (en) * | 2023-03-22 | 2023-06-06 | 华中科技大学 | Hierarchical wet flue gas ultra-clean desulfurization denitration dust collector based on composite absorption liquid |
CN116272929A (en) * | 2023-03-30 | 2023-06-23 | 西安热工研究院有限公司 | Active coke desulfurization and denitrification-regeneration-drying integrated system and method |
CN116870689A (en) * | 2023-08-29 | 2023-10-13 | 石家庄市龙力化工有限公司 | Dust removal, desulfurization and denitrification integrated process for industrial waste gas |
CN117258429A (en) * | 2023-09-21 | 2023-12-22 | 韶关市力高机械制造有限公司 | Air purifying equipment and air purifying method for online automatic powder spraying |
CN117427451A (en) * | 2023-12-21 | 2024-01-23 | 佛山市景鑫达陶瓷机械有限公司 | Kiln flue gas purification treatment device |
CN118161978A (en) * | 2024-05-14 | 2024-06-11 | 江苏民生重工有限公司 | Tail gas denitration purifier |
Families Citing this family (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105107349A (en) * | 2015-09-15 | 2015-12-02 | 中冶焦耐工程技术有限公司 | Coke oven flue gas desulfurization and denitrification purification process and device |
CN105664711B (en) * | 2016-01-27 | 2019-02-15 | 湖南宏福环保股份有限公司 | A kind of bag of filter formula depth denitration dust collecting integral system |
CN105771612A (en) * | 2016-05-03 | 2016-07-20 | 湖北思搏盈环保科技股份有限公司 | Environmental-protection comprehensive treatment system and environmental-protection comprehensive treatment process for high-pollution-factor low-temperature flue gas |
CN105944536A (en) * | 2016-05-12 | 2016-09-21 | 中冶华天工程技术有限公司 | Coke oven flue gas desulfurization technology and system |
CN106178877A (en) * | 2016-08-31 | 2016-12-07 | 大连华锐重工集团股份有限公司 | A kind of coke oven flue waste gas purification waste heat recovery apparatus and technique |
CN106390724A (en) * | 2016-11-29 | 2017-02-15 | 福建龙净环保股份有限公司 | Flue-gas purifying system for boiler |
CN106669864B (en) * | 2016-12-27 | 2019-03-08 | 环境保护部华南环境科学研究所 | A kind of reclaiming method for the denitrating catalyst that fails |
CN107088365A (en) * | 2017-05-15 | 2017-08-25 | 大唐环境产业集团股份有限公司 | A kind of Y types SCR system catalyst on-line continuous regenerating unit |
CN108043210A (en) * | 2017-11-17 | 2018-05-18 | 山西省化工设计院 | A kind of desulfurization of coke oven flue gas and dedusting denitrification integral system |
CN107694335A (en) * | 2017-11-22 | 2018-02-16 | 中国科学院过程工程研究所 | A kind of metallurgical gas purifying treatment method |
CN108636108B (en) * | 2018-05-31 | 2021-01-12 | 武汉钢铁有限公司 | Chemical product tail gas purification process based on coking production process synergy |
KR102080396B1 (en) * | 2018-06-20 | 2020-02-21 | 한국조선해양 주식회사 | Apparatus for purifying exhaust gas |
CN108686496B (en) * | 2018-08-06 | 2023-12-08 | 江苏垦乐节能环保科技有限公司 | Flue gas desulfurization ultra-low emission pretreatment system and implementation method thereof |
CN108714370A (en) * | 2018-08-24 | 2018-10-30 | 重庆康明斯发动机有限公司 | A kind of exhaust treatment system |
CN108714360A (en) * | 2018-08-24 | 2018-10-30 | 重庆康明斯发动机有限公司 | A kind of exhaust treatment system |
CN109012101B (en) * | 2018-08-24 | 2024-06-14 | 佛山华清智业环保科技有限公司 | Ceramic flue gas dust removal desulfurization denitration system |
CN109381936B (en) * | 2018-12-12 | 2024-03-01 | 江苏中吴环境工程有限公司 | Working method of carbide slag warehouse top gas-dust separation and dust removal system |
CN109589767A (en) * | 2018-12-17 | 2019-04-09 | 郑州大学 | The method and apparatus of pollutant integration removing in a kind of glass furnace fume |
CN109592858A (en) * | 2019-01-29 | 2019-04-09 | 山东明晟环保工程有限公司 | A kind of Coking Plant Wastewater zero-emission concentrated water processing system and its processing method |
CN109731472B (en) * | 2019-03-11 | 2021-10-22 | 内蒙古佳源环保科技有限公司 | Energy-saving boiler flue gas purification system and method |
CN109954404A (en) * | 2019-04-24 | 2019-07-02 | 福建龙净环保股份有限公司 | SCR denitration system |
CN110394040A (en) * | 2019-08-06 | 2019-11-01 | 北京首钢国际工程技术有限公司 | A kind of dry coke quenching technique dispersing gas desulfurizer |
CN111229040A (en) * | 2019-10-08 | 2020-06-05 | 黄震 | Novel weighing type ship-shaped ash bucket |
CN111545026A (en) * | 2020-05-12 | 2020-08-18 | 江苏峰峰鸿运环保科技发展有限公司 | Low-temperature efficient desulfurization and denitrification device and method for flue gas |
CN111715070A (en) * | 2020-05-25 | 2020-09-29 | 北京中航泰达环保科技股份有限公司 | Ultra-clean discharge system and method for desulfurization and denitrification treatment of boiler flue gas |
CN111715069A (en) * | 2020-05-25 | 2020-09-29 | 北京中航泰达环保科技股份有限公司 | Ultra-clean discharge system and method for desulfurization and denitrification of sintering flue gas by using spray drying method |
CN111545028A (en) * | 2020-06-22 | 2020-08-18 | 北京晨晰环保工程有限公司 | Integrative device of SOx/NOx control |
CN111659242A (en) * | 2020-06-24 | 2020-09-15 | 山西焦煤集团有限责任公司 | Coke oven flue gas desulfurization, denitrification and dust removal system and method with exhaust gas circulation |
CN112044345A (en) * | 2020-09-22 | 2020-12-08 | 马鞍山奥柯环保科技发展有限公司 | Novel SDA desulfurizing tower bed charge cyclic utilization system |
CN114028893B (en) * | 2021-11-24 | 2022-09-23 | 徐州中科艾易西环保科技研究院有限公司 | Packed tower for air purification |
CN114307572A (en) * | 2021-12-02 | 2022-04-12 | 中冶焦耐(大连)工程技术有限公司 | System and process for cooperatively removing CO and other pollutants in coke oven flue gas |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103816796A (en) * | 2014-03-11 | 2014-05-28 | 中冶焦耐工程技术有限公司 | Low-temperature coke oven flue waste gas desulphurization and denitration process |
CN103816780A (en) * | 2014-03-11 | 2014-05-28 | 中冶焦耐工程技术有限公司 | Integrated low-temperature flue gas desulfurization, denitration and ammonia removal process |
CN103990375A (en) * | 2014-05-28 | 2014-08-20 | 鞍钢集团工程技术有限公司 | Integrated semi-dry purifying method for sintering flue gas |
CN104258673A (en) * | 2014-09-18 | 2015-01-07 | 中冶焦耐工程技术有限公司 | Middle-low-temperature flue gas desulfurization, dedusting and denitration and denitration catalyst thermal-desorption integrated device |
CN104707454A (en) * | 2015-03-27 | 2015-06-17 | 山东钢铁股份有限公司 | Residual heat utilization and simultaneous desulfurization and denitrification system for tower type coke oven flue gas |
CN105107349A (en) * | 2015-09-15 | 2015-12-02 | 中冶焦耐工程技术有限公司 | Coke oven flue gas desulfurization and denitrification purification process and device |
CN204996310U (en) * | 2015-09-15 | 2016-01-27 | 中冶焦耐工程技术有限公司 | Coke oven flue gas SOx/NOx control unites purifier |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2989363B2 (en) * | 1992-02-05 | 1999-12-13 | 三菱重工業株式会社 | Exhaust gas treatment method |
CN102380308A (en) * | 2010-09-03 | 2012-03-21 | 鞍钢集团工程技术有限公司 | Sintering flue gas desulfurization and purification method and equipment |
US8828340B2 (en) * | 2011-09-29 | 2014-09-09 | Babcock & Wilcox Power Generation Group, Inc. | Dry sorbent injection during steady-state conditions in dry scrubber |
CN104399371A (en) * | 2014-11-20 | 2015-03-11 | 中冶焦耐工程技术有限公司 | Medium and low temperature denitration, dedusting and thermo-analysis integrated method and device |
-
2015
- 2015-09-15 CN CN201510586987.4A patent/CN105107349A/en active Pending
-
2016
- 2016-09-14 KR KR1020177030475A patent/KR102003148B1/en active IP Right Grant
- 2016-09-14 WO PCT/CN2016/098981 patent/WO2017045602A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103816796A (en) * | 2014-03-11 | 2014-05-28 | 中冶焦耐工程技术有限公司 | Low-temperature coke oven flue waste gas desulphurization and denitration process |
CN103816780A (en) * | 2014-03-11 | 2014-05-28 | 中冶焦耐工程技术有限公司 | Integrated low-temperature flue gas desulfurization, denitration and ammonia removal process |
CN103990375A (en) * | 2014-05-28 | 2014-08-20 | 鞍钢集团工程技术有限公司 | Integrated semi-dry purifying method for sintering flue gas |
CN104258673A (en) * | 2014-09-18 | 2015-01-07 | 中冶焦耐工程技术有限公司 | Middle-low-temperature flue gas desulfurization, dedusting and denitration and denitration catalyst thermal-desorption integrated device |
CN104707454A (en) * | 2015-03-27 | 2015-06-17 | 山东钢铁股份有限公司 | Residual heat utilization and simultaneous desulfurization and denitrification system for tower type coke oven flue gas |
CN105107349A (en) * | 2015-09-15 | 2015-12-02 | 中冶焦耐工程技术有限公司 | Coke oven flue gas desulfurization and denitrification purification process and device |
CN204996310U (en) * | 2015-09-15 | 2016-01-27 | 中冶焦耐工程技术有限公司 | Coke oven flue gas SOx/NOx control unites purifier |
Cited By (60)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106994302A (en) * | 2017-05-03 | 2017-08-01 | 江苏天楹环保能源成套设备有限公司 | A kind of new and effective SCR denitration system |
CN107008144A (en) * | 2017-05-23 | 2017-08-04 | 国电科学技术研究院 | A kind of device and denitration method for flue gas for realizing SCR denitrating flue gas multistage spray ammonia |
CN107008144B (en) * | 2017-05-23 | 2023-05-26 | 国家能源集团科学技术研究院有限公司 | Device for realizing SCR flue gas denitration multistage ammonia spraying and flue gas denitration method |
CN108176221B (en) * | 2017-12-28 | 2024-04-09 | 中冶南方都市环保工程技术股份有限公司 | Sintering flue gas temperature rising denitration device and sintering flue gas temperature rising denitration method |
CN108176221A (en) * | 2017-12-28 | 2018-06-19 | 武汉都市环保工程技术股份有限公司 | Sintering flue gas heating and denitration equipment and sintering flue gas heating and denitration method |
CN108144443A (en) * | 2018-02-05 | 2018-06-12 | 山东大学 | A kind of powdered activated coke combined desulfurization and the system and method for denitration |
CN108144443B (en) * | 2018-02-05 | 2023-10-03 | 山东大学 | System and method for combined desulfurization and denitration of powdery active coke |
CN108371875A (en) * | 2018-04-27 | 2018-08-07 | 马鞍山金安环境科技有限公司 | A kind of flue-gas dust-removing and desulfurization denitrification system |
CN109351145A (en) * | 2018-11-01 | 2019-02-19 | 唐山钢铁集团有限责任公司 | A kind of device for the operation of dense flow absorber desulphurization plant unilateral side tower |
CN109200800A (en) * | 2018-11-19 | 2019-01-15 | 中冶焦耐(大连)工程技术有限公司 | A kind of dry coke quenching flue-gas dust-removing and desulfurization purification device and technique |
CN109264717B (en) * | 2018-12-05 | 2024-01-30 | 诺曼利尔(青岛)环境能源技术有限公司 | Clean production process and system for activated carbon and coke |
CN109264717A (en) * | 2018-12-05 | 2019-01-25 | 诺曼利尔(青岛)环境能源技术有限公司 | Active carbon, burnt process for cleanly preparing and system |
CN109381933A (en) * | 2018-12-24 | 2019-02-26 | 永兴特种不锈钢股份有限公司 | A kind of cleaner and equipment operation method applied to steel rolling line reversable mill |
CN109432977A (en) * | 2018-12-26 | 2019-03-08 | 国电龙源节能技术有限公司 | A kind of denitration dilution wind system |
CN109432977B (en) * | 2018-12-26 | 2023-11-03 | 国能龙源蓝天节能技术有限公司 | Denitration dilution air system |
CN109569223A (en) * | 2019-01-24 | 2019-04-05 | 上海弗来应实业有限公司 | A kind of desulphurization denitration dust pelletizing system |
CN110064286A (en) * | 2019-04-12 | 2019-07-30 | 华电电力科学研究院有限公司 | A kind of cooling joint reducing agent of SNCR spray gun evaporates pyrolysis system and its working method |
CN110064286B (en) * | 2019-04-12 | 2023-07-11 | 华电电力科学研究院有限公司 | SNCR spray gun cooling combined reducing agent evaporation pyrolysis system and working method thereof |
CN109999656A (en) * | 2019-05-07 | 2019-07-12 | 福建龙净脱硫脱硝工程有限公司 | Realize the flue gas circulating fluidized bed desulfurization of full working scope desulphurization denitration and the composite processing system and flue gas processing method of SCR denitration |
CN109999656B (en) * | 2019-05-07 | 2024-03-08 | 福建龙净脱硫脱硝工程有限公司 | Combined treatment system and flue gas treatment method for realizing full-working-condition desulfurization and denitration of flue gas circulating fluidized bed desulfurization and SCR denitration |
CN110425731A (en) * | 2019-08-16 | 2019-11-08 | 北京首钢国际工程技术有限公司 | A kind of SCR denitration Smoke-heating device for wearing circumferential weld obturator |
CN110425731B (en) * | 2019-08-16 | 2024-04-02 | 北京首钢国际工程技术有限公司 | SCR denitration flue gas heating device with circular seam sealing device |
CN111298619A (en) * | 2020-02-27 | 2020-06-19 | 四川恒泰环境技术有限责任公司 | Electric smelting furnace flue gas treatment device and method |
CN111450628B (en) * | 2020-03-31 | 2023-10-13 | 苏州仕净科技股份有限公司 | Dust removal desulfurization denitration integrated device suitable for waste incineration waste gas |
CN111450628A (en) * | 2020-03-31 | 2020-07-28 | 苏州仕净环保科技股份有限公司 | Be applicable to msw incineration waste gas dust removal SOx/NOx control integrated device |
CN111413938A (en) * | 2020-04-16 | 2020-07-14 | 南京英璞瑞自动化科技有限公司 | SCR denitration system disturbance suppression prediction control method based on converted ammonia injection amount |
CN111672288A (en) * | 2020-06-15 | 2020-09-18 | 中国联合工程有限公司 | Ammonium sulfate slurry ash removal structure and operation method |
CN111632492A (en) * | 2020-07-03 | 2020-09-08 | 福建龙净脱硫脱硝工程有限公司 | Medium and low temperature SCR denitration ammonia injection system |
CN111821790A (en) * | 2020-08-13 | 2020-10-27 | 佛山市尘博仕环保工程有限公司 | Conical porous high-efficiency atomizing dust-removing desulfurizing tower |
CN112206643A (en) * | 2020-08-25 | 2021-01-12 | 江苏峰业科技环保集团股份有限公司 | Desulfurization and purification method of low-temperature sintering flue gas |
CN112156579A (en) * | 2020-09-16 | 2021-01-01 | 马鞍山市示范生产力促进中心有限公司 | Smoke-discharging and dust-removing device for electric metallurgical furnace |
CN112546783A (en) * | 2020-11-10 | 2021-03-26 | 将乐三晶新材料有限公司 | Ore smelting furnace dust collector |
CN112546749A (en) * | 2020-11-20 | 2021-03-26 | 惠州市晟利科技有限公司 | Cloth bag type air supply device with filtering and dust removing functions and using method |
CN114763909A (en) * | 2021-01-14 | 2022-07-19 | 中工国际工程股份有限公司 | Boiler system of circulating fluidized bed coupling ion waterfall |
CN112919499A (en) * | 2021-02-02 | 2021-06-08 | 自然资源部天津海水淡化与综合利用研究所 | Method for recycling sodium bicarbonate dry-process desulfurized fly ash |
CN115245737B (en) * | 2021-04-25 | 2024-02-02 | 湖南天桥环境科技有限公司 | Flue gas SCR denitrification facility and flue gas processing system |
CN115245737A (en) * | 2021-04-25 | 2022-10-28 | 湖南天桥环境科技有限公司 | Flue gas SCR denitrification facility and flue gas processing system |
CN113680192A (en) * | 2021-08-14 | 2021-11-23 | 江苏神舟灯饰有限公司 | Waste smoke and waste gas treatment process |
CN113617214A (en) * | 2021-08-16 | 2021-11-09 | 齐明 | High-efficient environmental protection flue gas desulfurization device |
CN113877419A (en) * | 2021-09-16 | 2022-01-04 | 上海嘉德环境能源科技有限公司 | Low-temperature flue gas desulfurization and denitrification system and method for heat accumulating type steel rolling heating furnace |
CN113817920A (en) * | 2021-10-18 | 2021-12-21 | 中冶北方(大连)工程技术有限公司 | Preparation of V from desulfurized fly ash and vanadium titano-magnetite2O5Pellet system and method |
CN116036853A (en) * | 2021-10-28 | 2023-05-02 | 中国石油化工股份有限公司 | Flue gas denitration ammonia spraying mixed dust removal equipment and system |
CN114470982A (en) * | 2022-03-01 | 2022-05-13 | 安徽天顺环保过滤材料有限公司 | Flue gas filters blowback formula dust removal filter bag for coal fired boiler |
CN114470982B (en) * | 2022-03-01 | 2023-09-19 | 安徽天顺环保过滤材料有限公司 | Flue gas filtering back-blowing type dedusting filter bag for coal-fired boiler |
CN115055042A (en) * | 2022-05-31 | 2022-09-16 | 中琉环保科技有限公司 | Desulfurizing tower capable of automatically feeding and discharging |
CN115055042B (en) * | 2022-05-31 | 2023-10-27 | 中琉环保科技有限公司 | Desulfurizing tower capable of automatically feeding and discharging |
CN115090108A (en) * | 2022-06-17 | 2022-09-23 | 天津铁厂有限公司 | Treatment device and process for reducing nitrogen oxides in coke oven flue gas |
CN115155192B (en) * | 2022-07-08 | 2023-11-07 | 宁夏上峰萌生建材有限公司 | Purifying and discharging device for flue gas desulfurization and denitrification |
CN115155192A (en) * | 2022-07-08 | 2022-10-11 | 宁夏上峰萌生建材有限公司 | A purify discharging equipment for flue gas desulfurization denitration |
CN114904394A (en) * | 2022-07-13 | 2022-08-16 | 北华航天工业学院 | Flue gas nitrogen oxide denitration treatment device |
CN115889337A (en) * | 2022-12-09 | 2023-04-04 | 南京金陵石化建筑安装工程有限公司 | Flue gas denitration system of industrial boiler |
CN116212550A (en) * | 2023-03-22 | 2023-06-06 | 华中科技大学 | Hierarchical wet flue gas ultra-clean desulfurization denitration dust collector based on composite absorption liquid |
CN116212550B (en) * | 2023-03-22 | 2024-04-02 | 华中科技大学 | Hierarchical wet flue gas ultra-clean desulfurization denitration dust collector based on composite absorption liquid |
CN116272929A (en) * | 2023-03-30 | 2023-06-23 | 西安热工研究院有限公司 | Active coke desulfurization and denitrification-regeneration-drying integrated system and method |
CN116870689A (en) * | 2023-08-29 | 2023-10-13 | 石家庄市龙力化工有限公司 | Dust removal, desulfurization and denitrification integrated process for industrial waste gas |
CN116870689B (en) * | 2023-08-29 | 2024-04-16 | 石家庄市龙力化工有限公司 | Dust removal, desulfurization and denitrification integrated process for industrial waste gas |
CN117258429A (en) * | 2023-09-21 | 2023-12-22 | 韶关市力高机械制造有限公司 | Air purifying equipment and air purifying method for online automatic powder spraying |
CN117427451A (en) * | 2023-12-21 | 2024-01-23 | 佛山市景鑫达陶瓷机械有限公司 | Kiln flue gas purification treatment device |
CN117427451B (en) * | 2023-12-21 | 2024-03-29 | 佛山市景鑫达陶瓷机械有限公司 | Kiln flue gas purification treatment device |
CN118161978A (en) * | 2024-05-14 | 2024-06-11 | 江苏民生重工有限公司 | Tail gas denitration purifier |
Also Published As
Publication number | Publication date |
---|---|
KR20170134516A (en) | 2017-12-06 |
KR102003148B1 (en) | 2019-07-23 |
CN105107349A (en) | 2015-12-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2017045602A1 (en) | Coke oven flue gas desulfurization and denitrification combined purification process and apparatus | |
CN103816780B (en) | A kind of low-temperature flue gas desulphurization denitration is except ammonia integral process | |
CN103816796B (en) | A kind of low temperature coke oven flue gas desulfurization systems denitrating technique | |
CN108261853B (en) | Coke oven viscous smoke dust removing system and method for pre-spraying powder activity regeneration | |
CN105126618B (en) | A kind of middle low-temperature flue gas integrated processing technique and device | |
CN105080332A (en) | Resource utilization system for pellet sintering waste gas and method | |
CN204996310U (en) | Coke oven flue gas SOx/NOx control unites purifier | |
CN105194989A (en) | Flue gas dust removal, desulfurization and denitrification coprocessing technology | |
CN103405982B (en) | Smoke purification device | |
CN102580517A (en) | Fume desulfurization system and method by adopting dried alkali electrostatic spraying and fume humidifying cooling method | |
CN110252140A (en) | Low temperature SCR denitration device and technique in a kind of heater for rolling steel flue gas dry desulfurizing | |
CN203400612U (en) | Flue gas purification system | |
CN109364747A (en) | A kind of collecting smoke dust from coke oven desulphurization system and technique | |
CN201940171U (en) | Flue gas desulfurization system with dry alkali electrostatic spray and flue gas humidification and temperature reduction method | |
CN204952658U (en) | Sintering pelletizing flue gas resource system | |
CN105056918B (en) | Energy saving and environment friendly active coke regeneration system and method | |
CN206240329U (en) | Flue gas desulfurization denitration dust-removing system | |
CN207076306U (en) | The device that a kind of sulfur trioxide in flue gas is administered | |
CN219722462U (en) | High-temperature flue gas dust removal, desulfurization and denitrification integrated system for glass kiln | |
CN203853017U (en) | Desulfurization and denitrification device for low-temperature waste gas of flue of coke oven | |
CN107321174B (en) | Sintering smoke autocatalytic denitration process by coupling and utilizing waste heat of sintering smoke | |
CN203400632U (en) | Flue gas purification device | |
CN202343097U (en) | Dust removal and catalytic denitration reaction device for garbage incineration flue gas | |
CN203764107U (en) | Integrated low-temperature flue gas desulfurization and denitrification ammonia removal device | |
CN213160123U (en) | Asphalt flue gas adsorption device and purification system for graphite electrode kneading process |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16845716 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20177030475 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 16845716 Country of ref document: EP Kind code of ref document: A1 |