CN110893379B - Cement kiln tail high temperature dust removal deNOx systems - Google Patents
Cement kiln tail high temperature dust removal deNOx systems Download PDFInfo
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- CN110893379B CN110893379B CN201911376193.XA CN201911376193A CN110893379B CN 110893379 B CN110893379 B CN 110893379B CN 201911376193 A CN201911376193 A CN 201911376193A CN 110893379 B CN110893379 B CN 110893379B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
- B03C3/013—Conditioning by chemical additives, e.g. with SO3
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/41—Ionising-electrodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/45—Collecting-electrodes
- B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/86—Electrode-carrying means
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Abstract
The invention discloses a high-temperature dust removal and denitration system for a cement kiln tail, which is characterized in that: including the pre-heater, high temperature electrostatic precipitator, SCR deNOx systems, exhaust-heat boiler, normal atmospheric temperature dust remover, the chimney, the pre-heater, high temperature electrostatic precipitator, SCR deNOx systems, exhaust-heat boiler, normal atmospheric temperature dust remover, the chimney sets gradually according to the flow direction of flue gas, connect through the flue between each equipment, high temperature electrostatic precipitator includes the dust remover body, the dust remover body left and right sides is connected with dust remover import and dust remover export respectively, dust remover body sub-unit connection has the ash bucket, dust remover import and dust remover export are the toper, the great end of diameter of dust remover import links to each other with the dust remover body, the less end of diameter of dust remover import links to each other through the export of flue and pre-heater. The invention is used for treating the cement kiln tail flue gas, and can effectively carry out dust removal and denitration treatment on the flue gas.
Description
Technical Field
The invention relates to the technical field of flue gas treatment, in particular to a high-temperature dust removal and denitration system for a cement kiln tail.
Background
The existing cement kiln production process can generate a large amount of dust, nitrogen oxides and the like, particularly tail gas discharged from the kiln tail, the flue gas temperature is generally 320-350 ℃, and the dust concentration is generally 80g/Nm3～100g/Nm3The nitrogen oxide concentration is generally 700mg/Nm3～800mg/Nm3. The traditional flue gas treatment route is that kiln tail flue gas is reduced to about 150 ℃ by a waste heat boiler, then a bag dust remover or a normal temperature electric precipitator is adopted for dust removal, and then the flue gas is discharged, wherein the discharge concentration is generally 20mg/Nm3～30mg/Nm3. The denitration technology generally adopts low-nitrogen combustion and SNCR denitration technology, and the emission concentration of nitrogen oxide is generally more than 200mg/Nm3Cannot meet the requirement of 50mg/Nm of ultra-low emission3The requirements of (1).
The ultra-low emission of nitrogen oxides lower than 50mg/Nm can be realized by adopting SCR denitration technology for coal-fired flue gas3So that the SCR technology can be applied to the cement kiln flue gas treatment by taking the successful experience of coal-fired flue gas treatment as reference. However, the flue gas characteristics of the cement kiln are special, the dust concentration is high, and the calcium oxide content in the dust is particularly high, so that the catalyst is easily abraded, blocked and poisoned, and the denitration efficiency is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-temperature dust removal and denitration system for a cement kiln tail, which is applied to flue gas treatment of a cement kiln.
In order to achieve the purpose, the invention provides the following technical scheme to realize the purpose:
a high-temperature dust removal and denitration system for a cement kiln tail comprises a preheater, a high-temperature electric precipitator, an SCR denitration system, a waste heat boiler, a normal-temperature dust remover and a chimney, wherein the preheater, the high-temperature electric precipitator, the SCR denitration system, the waste heat boiler, the normal-temperature dust remover and the chimney are sequentially arranged according to the flow direction of flue gas, and all the devices are connected through a flue;
the high-temperature electric dust remover comprises a dust remover body, the left side and the right side of the dust remover body are respectively connected with a dust remover inlet and a dust remover outlet, the lower part of the dust remover body is connected with an ash hopper, the dust remover inlet and the dust remover outlet are both conical, the larger diameter end of the dust remover inlet is connected with the dust remover body, the smaller diameter end of the dust remover inlet is connected with the outlet of a preheater through a flue, the larger diameter end of the dust remover outlet is connected with the dust remover body, the smaller diameter end of the dust remover outlet is connected with the inlet of an SCR denitration system through a pipeline, a guide plate is arranged in the dust remover outlet, an air flow distribution plate is arranged in the dust remover inlet, the upper end of the air flow distribution plate is fixedly connected with the top wall of the dust remover inlet, and the lower end of the air flow distribution plate is suspended; the dust remover comprises a dust remover body, a plurality of anode systems and a plurality of cathode systems are arranged in the dust remover body, the anode systems are parallel to each other, the anode systems are parallel to the flowing direction of flue gas in the dust remover body, the cathode systems are arranged between the two anode systems, each anode system comprises an anode frame and an anode plate arranged on the anode frame, each cathode system comprises an insulating porcelain bushing, a cathode frame, a suspender, a discharge electrode and an auxiliary electrode, each cathode frame comprises a cathode frame upper beam and a cathode frame lower beam, two ends of each discharge electrode and the corresponding auxiliary electrode are respectively fixed on the cathode frame upper beam and the cathode frame lower beam, the discharge electrodes and the corresponding auxiliary electrodes are arranged on the cathode frames in a staggered mode, a heat preservation chamber is arranged at the upper part of the dust remover body, the insulating porcelain bushings are arranged in the heat preservation chamber, the upper ends of the suspenders are fixed on the insulating porcelain bushings to enable the cathode frames to be hoisted in the dust remover body to be insulated from the dust remover body, the heat preservation chamber is connected with a hot air pipe.
The anode frame comprises two support frames and a plurality of connecting plates arranged between the two support frames, the left end and the right end of each connecting plate are respectively connected with the support frames on the two sides, the inner side of each support frame is provided with a mounting groove along the length direction of the support frame, the two sides of the anode plate are upwards bent inwards to form a hanging lug, the middle of each anode plate is of a wave-shaped structure with at least three waves, and the anode plate is fixed on the anode frame through bolts. The wave-shaped structure of the anode plate is provided with a hole, the position of the hole is selected between two waves, the hanging lugs on two sides are inserted into the mounting grooves when the anode plate is inserted into the anode frame, and the bolt penetrates through the hole on the anode plate and then is screwed into the connecting plate so as to fix the anode plate on the anode frame.
At least two anode plates are arranged on the anode frame, and a certain gap is reserved between every two adjacent anode plates.
The discharge electrode is formed by processing a thin plate, and the thin plate is provided with a needle which is directly formed by punching and bending the edge of the thin plate.
The upper part of the dust remover body is provided with a vibrating ash removal mechanism, and the vibrating end of the vibrating ash removal mechanism is respectively contacted with the anode frame and the cathode frame.
The dust remover body, the dust remover inlet, the dust remover outlet and the ash bucket are all provided with heat preservation layers.
SCR deNOx systems includes denitration reactor, and denitration reactor upper portion and lower part are equipped with gas inlet and exhanst gas outlet respectively, and denitration reactor top is equipped with flow straightener, and the inside position that is located flow straightener below of denitration reactor is equipped with a plurality of catalyst layers, and the catalyst that uses in the catalyst layer adopts medium temperature catalyst formula.
The device also comprises a raw material bin, and the ash bucket is connected with the raw material bin through a pipeline.
The flue gas conditioning system is arranged on a flue between the preheater and the high-temperature dust remover.
The ammonia spraying system is arranged on a flue between the preheater and the high-temperature dust remover or on a flue between the high-temperature dust remover and the SCR denitration system.
Compared with the prior art, the invention has the beneficial effects that: 1. a high-temperature electric dust remover is arranged in front of the SCR denitration system to reduce the dust concentration at the SCR inlet to 10-20 g/Nm3(ii) a 2. A flue gas conditioning system is arranged, a conditioning agent is injected into flue gas, the conditioning agent and the flue gas are fully mixed in a flue connected with an inlet of a dust remover, and the specific resistance of dust is reduced. The modifying agent is aqueous solution and is sprayed into the flue at a certain pressure through a nozzle, so that fine dust in the flue gas can be agglomerated, the particle size is increased, and the modifying agent is convenient to capture; 3. the dust content of the inlet flue gas of the waste heat boiler can be reduced by the high-temperature electric dust remover, the dust deposition, abrasion and corrosion risks of the heat exchange surface of the waste heat boiler are reduced, the heat exchange efficiency is improved, more flue gas waste heat is recovered, and the outlet flue gas temperature of the waste heat boiler is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a high temperature dust collector in the present invention;
FIG. 3 is a schematic view of the construction of an anode system according to the present invention;
FIG. 4 is a front view of an anode system according to the present invention;
FIG. 5 is an enlarged schematic view at A in FIG. 4;
FIG. 6 is a schematic view of an anode plate according to the present invention;
FIG. 7 is a schematic view of another alternative construction of an anode plate according to the present invention;
FIG. 8 is a schematic structural view of a cathode system according to the present invention;
FIG. 9 is a schematic structural diagram of an SCR denitration system according to the present invention;
FIG. 10 is a schematic view of the structure of the discharge electrode of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below with reference to fig. 1-10.
The utility model provides a cement kiln tail high temperature dust removal deNOx systems, includes pre-heater 1, high temperature electrostatic precipitator 2, SCR deNOx systems, exhaust-heat boiler 4, normal atmospheric temperature dust remover 5, chimney 6, and pre-heater 1, high temperature electrostatic precipitator 2, SCR deNOx systems 3, exhaust-heat boiler 4, normal atmospheric temperature dust remover 5, chimney 6 set gradually according to the flow direction of flue gas, connect through the flue between each equipment.
A high-temperature electric dust remover is arranged in front of the SCR denitration system to reduce the dust concentration at the SCR inlet to 10-20 g/Nm3(ii) a The dust content of the inlet flue gas of the waste heat boiler is reduced, the risk of dust deposition, abrasion and corrosion of the heat exchange surface of the waste heat boiler is reduced, the heat exchange efficiency is improved, more flue gas waste heat is recovered, and the outlet flue gas temperature of the waste heat boiler is reduced; the dust content of the inlet flue gas of the normal-temperature dust remover is reduced, the dust collection efficiency can be further improved under the condition of keeping the existing dust collection area unchanged, and the emission concentration of a dust outlet is ensured to be 15-30 mg/Nm3Reduced to 5-10 mg/Nm3The following. In addition, the temperature of the smoke at the outlet of the waste heat boiler is reduced, the amount of the smoke at the inlet of the normal temperature dust remover is reduced, the retention time of the smoke in the normal temperature dust remover is correspondingly increased, and the improvement of the dust removal efficiency can be promoted.
The high-temperature electric dust collector 2 comprises a dust collector body 201, the left side and the right side of the dust collector body 201 are respectively connected with a dust collector inlet 202 and a dust collector outlet 203, the lower part of the dust collector body 201 is connected with an ash bucket 206, the dust collector inlet 202 and the dust collector outlet 203 are both conical, the larger diameter end of the dust collector inlet 202 is connected with the dust collector body 201, the smaller diameter end of the dust collector inlet 202 is connected with an outlet of the preheater 1 through a flue, the larger diameter end of the dust collector outlet 203 is connected with the dust collector body 201, the smaller diameter end of the dust collector outlet 203 is connected with an inlet of the SCR denitration system 3 through a pipeline, a flow guide plate 205 is arranged in the dust collector outlet 203, an air flow distribution plate 204 is arranged in the dust collector inlet 202, the upper end of the air flow distribution plate 204 is fixedly connected with the top wall of the dust collector inlet 202, and the lower end is suspended; a plurality of electric fields are arranged in the dust remover body 201, each electric field comprises an anode system 207 and a cathode system 208, the anode systems 207 are arranged in parallel, the anode systems 207 are parallel to the flowing direction of flue gas in the dust remover body 201, the cathode systems 208 are arranged between the two anode systems 207, each anode system 207 comprises an anode frame 221 and an anode plate 213 arranged on the anode frame 221, each cathode system 208 comprises an insulating porcelain bushing 218, a cathode frame, a suspender 216, a discharge electrode 219 and an auxiliary electrode 217, each cathode frame comprises an upper cathode frame beam 214 and a lower cathode frame beam 215, the two ends of the discharge electrode 219 and the auxiliary electrode 217 are respectively fixed on the upper cathode frame beam 214 and the lower cathode frame beam 215, the discharge electrodes 219 and the auxiliary electrodes 217 are arranged on the cathode frame in a staggered manner, heat preservation chambers 211 are arranged on the upper portion of the dust remover body 201, the insulating porcelain bushings 218 are arranged in the heat preservation chambers 211, the upper ends of the suspenders 216 are fixed on the insulating bushings 218 so that the cathode frames are hung in the dust remover body 201, the insulation with the dust collector body is ensured, and the heat preservation chamber 211 is connected with a hot air pipe 210. The discharge electrodes 219 and the auxiliary electrodes 217 are alternately arranged between the cathode frames, and a continuously repeated double-zone electric field, namely a charged dust collecting zone and a uniform electric field dust collecting zone, is formed in the cathode system 208. Inside high temperature dusty flue gas gets into dust remover body 201 after getting into dust remover import 202 through air current distribution board 204 flow equalizing, the needle point corona discharge of discharge electrode 219, under auxiliary electrode 217's influence, the ion wind area receives the shielding effect of homopolar electrode and is compressed for the current density in the ion wind is big and even, thereby has shortened the electric charge time of dust in the electric field greatly. In the uniform electric field, the driving speed is greatly improved, positively charged dust can be trapped, the occurrence of back corona is inhibited, and the high specific resistance dust is favorably trapped.
The anode frame 221 comprises two support frames 222 and a plurality of connecting plates 223 arranged between the two support frames 222, the left end and the right end of each connecting plate 223 are connected with the support frames 222 on the two sides respectively, an installation groove 224 is formed in the inner side of each support frame 222 along the length direction of the support frame, the two sides of the anode plate 213 are bent upwards and inwards to form a hanging lug 220, the middle of each supporting frame is of a wave-shaped structure with at least three waves, and the anode plate 213 is fixed on the anode frame 221 through bolts. The wavy structure of the anode plate 213 is provided with holes, the positions of the holes are selected between two waves, the hanging lugs 220 at two sides are inserted into the mounting grooves 224 when the anode plate 213 is inserted into the anode frame 221, and bolts penetrate through the holes on the anode plate 213 and are screwed into the connecting plate 223 so as to fix the anode plate 213 on the anode frame 221, so that the anode plate 213 can be effectively prevented from deforming in a high-temperature environment.
The anode plate 213 is formed by rolling an SPCC plate and has certain rigidity. The width of the anode plate 213 is 200 mm-1200 mm. The cross section of the middle part of the anode plate 213 is wave-shaped or saw-tooth-shaped, the width of a single wave (saw tooth) is 20 mm-80 mm, and the height of the wave (saw tooth) is 10 mm-30 mm. The structure of the anode plate 213 increases rigidity, reduces thermal deformation at high temperature, and also reduces secondary flying of dust.
At least two anode plates 213 are arranged on the anode frame 221, and a certain gap is reserved between every two adjacent anode plates 213 to reserve a space for the thermal expansion of the anode plates 213.
The discharge electrodes 219 are formed by machining a thin plate, and the needle 225 is formed by punching and bending the edge of the thin plate directly.
The upper part of the dust collector body 201 is provided with a rapping dust-cleaning mechanism 212, and the vibration end of the rapping dust-cleaning mechanism 212 is respectively contacted with the anode frame 221 and the cathode frame for dust cleaning.
The dust collector body 201, the dust collector inlet 202, the dust collector outlet 203 and the ash bucket 206 are all externally provided with an insulating layer 209.
The ash hopper 206 is connected with the raw material bin 7 through a pipeline. Dust collected by the high-temperature dust remover enters the ash hopper 206 and returns to the raw material bin 7 for recycling.
The SCR denitration system comprises a denitration reactor 3, wherein the upper part and the lower part of the denitration reactor 3 are respectively provided with a flue gas inlet 31 and a flue gas outlet 34, the top of the denitration reactor 3 is provided with a flow equalizing device 32, a plurality of catalyst layers 33 are arranged in the denitration reactor 3 and positioned below the flow equalizing device 32, and a medium-temperature catalyst formula is adopted as a catalyst used in the catalyst layers 33.
The invention also comprises a flue gas conditioning system 8, wherein the flue gas conditioning system 8 is arranged on the flue between the preheater 1 and the high-temperature dust remover 2, and a conditioning agent is injected into the flue gas of the flue by the flue gas conditioning system 8, so that the flue gas and the conditioning agent are mixed, and the specific resistance of dust is reduced. On the other hand, the modifying agent is aqueous solution and is sprayed into the flue through a nozzle with certain pressure and special design, so that fine dust in the flue gas can be agglomerated, the particle size is increased, and the modifying agent is convenient to capture. The modifying agent is sodium salt solution.
The invention also comprises an ammonia spraying system 9, wherein the ammonia spraying system 9 is arranged on a flue between the preheater 1 and the high-temperature dust remover 2 or a flue between the high-temperature dust remover 2 and the SCR denitration system 3. The ammonia injection system 9 injects ammonia water solution with a certain proportion into the flue gas in the flue.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. The utility model provides a cement kiln tail high temperature dust removal deNOx systems which characterized in that: the system comprises a preheater, a high-temperature electric precipitator, an SCR denitration system, a waste heat boiler, a normal-temperature precipitator and a chimney, wherein the preheater, the high-temperature electric precipitator, the SCR denitration system, the waste heat boiler, the normal-temperature precipitator and the chimney are sequentially arranged according to the flow direction of flue gas, and all the devices are connected through a flue; the high-temperature electric dust collector comprises a dust collector body, wherein the left side and the right side of the dust collector body are respectively connected with a dust collector inlet and a dust collector outlet, the lower part of the dust collector body is connected with an ash hopper, the dust collector inlet and the dust collector outlet are both conical, the larger-diameter end of the dust collector inlet is connected with the dust collector body, the smaller-diameter end of the dust collector inlet is connected with an outlet of a preheater through a flue, the larger-diameter end of the dust collector outlet is connected with the dust collector body, the smaller-diameter end of the dust collector outlet is connected with an inlet of an SCR denitration system through a pipeline, a guide plate is arranged in the dust collector outlet, an air flow distribution plate is arranged in the dust collector inlet, the upper end of the air flow distribution plate is fixedly connected with the top wall of the dust collector inlet, and the lower end of the air flow distribution plate is suspended; the dust remover comprises a dust remover body, wherein an anode system and a cathode system are arranged in the dust remover body, the anode system is provided with a plurality of anode systems which are parallel to each other, the anode system is parallel to the flowing direction of flue gas in the dust remover body, the cathode system is arranged between two adjacent anode systems, the anode system comprises an anode frame and an anode plate arranged on the anode frame, the cathode system comprises an insulating porcelain sleeve, a cathode frame, a suspender, a discharge electrode and an auxiliary electrode, the cathode frame comprises a cathode frame upper beam and a cathode frame lower beam, two ends of the discharge electrode and the auxiliary electrode are respectively fixed on the cathode frame upper beam and the cathode frame lower beam, the discharge electrode and the auxiliary electrode are arranged on the cathode frame in a staggered manner, a heat preservation chamber is arranged at the upper part of the dust remover body, the insulating porcelain sleeve is arranged in the heat preservation chamber, the upper end of the suspender is fixed on the insulating porcelain sleeve to enable the cathode frame to be hoisted in the dust remover body, the insulation with the dust remover body is ensured, and the heat preservation chamber is connected with a hot air pipe; the anode frame comprises two support frames and a plurality of connecting plates arranged between the two support frames, the left end and the right end of each connecting plate are respectively connected with the support frames on two sides, the inner side of each support frame is provided with a mounting groove along the length direction of the support frame, the two sides of the anode plate are upwards bent inwards to form hanging lugs, the middle of each anode plate is of a wave-shaped structure with at least three waves, and the anode plate is fixed on the anode frame through bolts.
2. The high-temperature dust removal and denitration system for the cement kiln tail according to claim 1, characterized in that: at least two anode plates are arranged on the anode frame, and a certain gap is reserved between every two adjacent anode plates.
3. The high-temperature dust removal and denitration system for the cement kiln tail according to claim 1, characterized in that: the discharge electrode is formed by processing a thin plate, and the thin plate is provided with a needle which is directly formed by punching and bending the edge of the thin plate.
4. The high-temperature dust removal and denitration system for the cement kiln tail according to claim 1, characterized in that: the upper part of the dust remover body is provided with a rapping dust-cleaning mechanism, and the vibration end of the rapping dust-cleaning mechanism is respectively contacted with the anode frame and the cathode frame.
5. The high-temperature dust removal and denitration system for the cement kiln tail according to claim 1, characterized in that: the SCR denitration system comprises a denitration reactor, wherein a flue gas inlet and a flue gas outlet are respectively formed in the upper portion and the lower portion of the denitration reactor, a flow equalizing device is arranged at the top of the denitration reactor, and a plurality of catalyst layers are arranged in the denitration reactor and below the flow equalizing device.
6. The high-temperature dust removal and denitration system for the cement kiln tail according to claim 1, characterized in that: and heat insulation layers are arranged outside the dust remover body, the dust remover inlet, the dust remover outlet and the ash bucket.
7. The high-temperature dust removal and denitration system for the cement kiln tail according to claim 1, characterized in that: the device also comprises a raw material bin, and the ash bucket is connected with the raw material bin through a pipeline.
8. The high-temperature dust removal and denitration system for the cement kiln tail according to claim 1, characterized in that: the flue gas conditioning system is arranged on a flue between the preheater and the high-temperature dust remover.
9. The high-temperature dust removal and denitration system for the cement kiln tail according to claim 1, characterized in that: the ammonia spraying system is arranged on a flue between the preheater and the high-temperature dust remover or on a flue between the high-temperature dust remover and the SCR denitration system.
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| CN201911376193.XA CN110893379B (en) | 2019-12-27 | 2019-12-27 | Cement kiln tail high temperature dust removal deNOx systems |
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| CN201911376193.XA CN110893379B (en) | 2019-12-27 | 2019-12-27 | Cement kiln tail high temperature dust removal deNOx systems |
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| CN110893379B true CN110893379B (en) | 2021-12-21 |
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| CN212277984U (en) * | 2020-08-21 | 2021-01-01 | 浙江大维高新技术股份有限公司 | Power supply redundancy system of high-temperature dust removal and denitration system |
| CN112072777A (en) * | 2020-08-21 | 2020-12-11 | 浙江大维高新技术股份有限公司 | Power supply redundancy system and operation method of high-temperature dust removal and denitration system and method for maintaining and detecting high-voltage electric field by using power supply redundancy system |
| CN112892871B (en) * | 2021-01-04 | 2023-03-24 | 浙江德创环保科技股份有限公司 | Oil shale flue gas dust collector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203501199U (en) * | 2013-08-30 | 2014-03-26 | 安徽省元琛环保科技有限公司 | NOx-controlled denitrification device of glass kiln |
| CN104645828A (en) * | 2015-02-12 | 2015-05-27 | 浙江省环境保护科学设计研究院 | SCR denitration device and method applied to high-dust-content smoke from kiln tail of cement clinker production line |
| CN204704835U (en) * | 2015-06-26 | 2015-10-14 | 浙江西子联合工程有限公司 | Exhaust-heat boiler flue gas high-temperature dust removal SCR denitration treatment system |
| CN109966812A (en) * | 2019-03-29 | 2019-07-05 | 北京国电龙源环保工程有限公司 | A kind of cement kiln end denitrating flue gas and system, the process of waste heat recycling |
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| WO2012042892A1 (en) * | 2010-09-29 | 2012-04-05 | バブコック日立株式会社 | Oxygen combustion system and method for operating same |
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| CN203501199U (en) * | 2013-08-30 | 2014-03-26 | 安徽省元琛环保科技有限公司 | NOx-controlled denitrification device of glass kiln |
| CN104645828A (en) * | 2015-02-12 | 2015-05-27 | 浙江省环境保护科学设计研究院 | SCR denitration device and method applied to high-dust-content smoke from kiln tail of cement clinker production line |
| CN204704835U (en) * | 2015-06-26 | 2015-10-14 | 浙江西子联合工程有限公司 | Exhaust-heat boiler flue gas high-temperature dust removal SCR denitration treatment system |
| CN109966812A (en) * | 2019-03-29 | 2019-07-05 | 北京国电龙源环保工程有限公司 | A kind of cement kiln end denitrating flue gas and system, the process of waste heat recycling |
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