CN213853893U - Integral type gradient dust removal, denitrification facility - Google Patents
Integral type gradient dust removal, denitrification facility Download PDFInfo
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- CN213853893U CN213853893U CN202022485821.2U CN202022485821U CN213853893U CN 213853893 U CN213853893 U CN 213853893U CN 202022485821 U CN202022485821 U CN 202022485821U CN 213853893 U CN213853893 U CN 213853893U
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Abstract
The utility model relates to an integrated gradient dust removal and denitration device, which comprises an ammonia spraying system, a pre-dust removal system, a grading electric dust removal system, a power supply and control system and a denitration catalyst; the pre-dedusting system comprises a front diffusion section and a rear diffusion section, an ammonia water spray gun is arranged in a flue gas inlet of the front diffusion section, and the rear part of the rear diffusion section is communicated with the grading electric dedusting system; the grading electric dust removal system comprises an external shell, an ash storage hopper and an air outlet flue, wherein the front part and the rear part of the external shell are respectively connected with the rear diffusion section and the air outlet flue, and the ash storage hopper is arranged at the bottom of the external shell; an anode plate is arranged in the outer shell, the front part of the anode plate is provided with a I-level power supply system, the rear part of the anode plate is provided with a II-level power supply system, and the I-level power supply system and the II-level power supply system are respectively connected with a power supply and a control system; the denitration catalyst is arranged in the air outlet flue. The utility model discloses a gradient dust pelletizing system can detach 85% dust, after detaching most particulate matters, has avoided wearing and tearing, the jam and the poisoning of follow-up deNOx systems catalyst.
Description
Technical Field
The utility model relates to a cement industry atmospheric pollutants administers technical field, concretely relates to integral type gradient dust removal, denitrification facility.
Background
With the improvement of environmental protection requirements, the requirements for the content of NOx and particulate matters in industrial gas exhausted into the atmosphere are lower and lower. In the cement kiln tail flue gas denitration technology, generally, the NOx can be controlled to be 800mg/Nm by adopting the low-nitrogen combustion technology3Hereinafter, NOx may be controlled to 300mg/Nm using non-catalytic reduction technology3Hereinafter, NOx can be controlled to 50mg/Nm by catalytic reduction technology3The following. Therefore, the emission standard of the atmospheric pollutants is improved to 50mg/Nm3Later, catalytic reduction techniques were widely used.
The catalytic reduction denitration technology adopts the working principle that a catalyst is placed in a flue gas channel, and NH in flue gas is sprayed under the catalytic action of the catalyst3React with NOx in the flue gas to generate water and nitrogen.
The dust concentration in the tail flue gas of the cement kiln is as high as 120g/Nm3And the content of CaO in the dust is up to more than 30 percent, and the hazards brought by the characteristics are as follows: a) when flue gas containing high-concentration dust flows through the catalyst, the catalyst is quickly abraded due to the scouring action of the dust; when the concentration is too high, if the gas flow distribution is not uniform, deposition on the catalyst due to too low local flow velocity may occur, resulting in the blockage of the catalyst pore channel; b) high-concentration CaO is covered on the surface of the catalyst and reacts with SO in the flue gas3Reaction to produce CaSO4Plugging the micropores of the catalyst; c) dustOther alkaline earth metals in (a) can also cause catalyst poisoning. These all result in the catalyst losing its catalytic function and the system failing to achieve the desired NOx removal. Therefore, the particulate matter in the flue gas needs to be reduced to a certain concentration, and the dust concentration in the flue gas is reduced by an electric dust collector, a bag type dust collector or an electric-bag composite dust collector before the catalytic reduction denitration reactor in the prior art.
The working principle of the electric dust collector is that ions generated by high-voltage electrostatic ionization of flue gas are adsorbed on dust particles, the charged dust particles move to the positive electrode and the negative electrode of the electric dust collector under the action of a high-voltage electrostatic field, and then the dust is collected by rapping. The electric dust collector is designed into one to a plurality of electric fields according to the dust concentration and the dust amount to be removed. The running resistance of the electric dust remover is generally less than 200Pa, and the electric dust remover is adopted to reduce the dust concentration, so that the electric dust remover is a better technical means, but in the prior art, a denitration system is connected in series behind the electric dust remover, the flue gas path is a tapered outlet of the electric dust remover, and then enters the denitration system through a straight section and a flaring, so that the flow is long, the flow rate of the flue gas is changed for many times, and the local resistance is increased.
The working principle of the bag type dust collector is that dust-containing smoke passes through a filtering material such as a ceramic or metal filtering bag with certain porosity, coarse-particle dust is isolated by the filtering material, airflow flows through the isolated dust layer and the filtering material, and is subjected to larger resistance, and the resistance of the airflow after long-term operation is up to more than 2000 Pa.
The working principle of the electric-bag composite dust collector is that one or more electric dust removing electric fields are added in front of the bag type dust collector to remove a part of high-concentration dust, and then the high-concentration dust enters a bag dust removing area behind the electric-bag composite dust collector, at the moment, the dust concentration is greatly reduced, and the running resistance of the electric-bag composite dust collector is 100-300Pa lower than that of a pure bag type dust collector.
In conclusion, the dedusting and denitration combined system formed by combining the conventional electric dust collector, bag type dust collector or electric bag composite dust collector with the denitration system has the defect of high system running resistance.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in providing an integral type gradient dust removal, denitrification facility to the problem that cement kiln tail flue gas dust removal, the denitration system resistance that above-mentioned prior art exists, it can realize the dust removal and the denitration function of integration to denitration efficiency is high, system operating resistance is low.
The utility model discloses a solve the technical scheme that technical problem that the aforesaid provided adopted and be:
an integrated gradient dust removal and denitration device comprises an ammonia spraying system, a pre-dust removal system, a grading electric dust removal system, a power supply and control system and a denitration catalyst;
the ammonia spraying system comprises an ammonia water spray gun;
the pre-dedusting system comprises a front diffusion section and a rear diffusion section, the top of the front diffusion section is provided with a flue gas inlet, the ammonia water spray gun is installed in the flue gas inlet of the front diffusion section, the bottom of the front diffusion section is connected with the top of the rear diffusion section, and the rear part of the rear diffusion section is communicated with the grading electric dedusting system;
the grading electric dust removal system comprises an external shell, an ash storage hopper and an air outlet flue, wherein the front part of the external shell is connected with the rear part of the rear diffusion section, the rear part of the external shell is connected with the air outlet flue, and the ash storage hopper is installed at the bottom of the external shell; an anode plate is arranged in the outer shell, a I-level power supply system is arranged at the front part of the anode plate, a II-level power supply system is arranged at the rear part of the anode plate, the I-level power supply system and the II-level power supply system are respectively connected with the power supply and the control system, and the power supply and the control system respectively supply power to the I-level power supply system and the II-level power supply system according to the concentration distribution characteristics of dust in the smoke;
the denitration catalyst is arranged inside the air outlet flue.
In the above scheme, the level I power supply system includes an I cathode line and an I high frequency power supply, and the level II power supply system includes a II cathode line and an II high frequency power supply; the I cathode wire and the II cathode wire are respectively arranged at the front part and the rear part of the anode plate, the I high-frequency power supply is arranged at the top of the external shell and is connected with the I cathode wire through a power line, and the II high-frequency power supply is arranged at the top of the external shell and is connected with the II cathode wire through a power line.
In the above scheme, the I-level power supply system further comprises an I insulating support, the II-level power supply system further comprises an II insulating support, the I insulating support and the II insulating support are both arranged in the outer shell, the I insulating support is located on the upper portion of the I cathode line and used for supporting a power line of the I cathode line, and the II insulating support is located on the upper portion of the II cathode line and used for supporting a power line of the II cathode line.
In the above scheme, the pre-dedusting system further comprises a flow guide plate and a dust blocking flow equalizing plate; the dust blocking and flow equalizing plate is characterized in that a partition plate with an opening in the middle is arranged at the joint of the front diffusion section and the rear diffusion section, the flow guide plate is installed at the opening of the partition plate, and the dust blocking and flow equalizing plate is installed at the rear part of the rear diffusion section.
In the above scheme, the bottom of the pre-dedusting system is communicated with the ash storage hopper.
In the above scheme, spout the ammonia system still including setting up in the outside ammonia water pump and the aqueous ammonia jar of dust pelletizing system in advance, the entry and the aqueous ammonia jar of ammonia water pump are connected, and the export and the aqueous ammonia spray gun of aqueous ammonia pump are connected.
In the above scheme, the graded electric dust removal system further comprises a rapping device, wherein the rapping device is used for rapping the anode plate.
In the above scheme, the graded electric dust removal system further comprises a gate plate door and an ash discharge sealing valve, the gate plate door is installed at the lower part of the ash storage hopper, and the ash discharge sealing valve is installed at the lower part of the gate plate door.
In the above scheme, the junction of the external shell and the air outlet flue is provided with a resistance reduction rectifying device.
In the scheme, the denitration catalyst is provided with a plurality of layers along the airflow direction, and an ash removal device is arranged beside each layer of denitration catalyst.
The beneficial effects of the utility model reside in that:
1. the utility model discloses a remove dust in advance and hierarchical electric precipitation system's gradient dust pelletizing system, two parts around being divided into hierarchical electric precipitation system's flue gas, the impedance size according to the flue gas adopts different power supply system, makes power supply system and flue gas characteristic more accord with, has ensured behind hierarchical electric precipitation system, can detach 85% dust. After most of particles are removed, abrasion, blockage and poisoning of a subsequent denitration system catalyst are avoided, the running resistance of the system is reduced, and the denitration efficiency is improved.
2. The utility model discloses place the denitration catalyst in multistage electrostatic precipitator system's the flue of giving vent to anger, the catalyst is at the lower operating mode work of dust concentration, and denitration efficiency can reach more than 90%, can realize being less than 20mg Nm of NOx3Ultra-low emission.
3. The utility model discloses a denitration catalyst is placed in multistage electric dust collecting system's the flue of giving vent to anger, compares with conventional electrostatic precipitator + denitration reactor system, has reduced the contraction section of electrostatic precipitator export, the linkage segment of electrostatic precipitator and denitration reactor and the diffuser of denitration reactor entry, has reduced the loss of local resistance, and system resistance is no longer than 600 Pa.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
FIG. 1 is an overall structure diagram of the integrated gradient dust-removing and denitration device of the utility model;
FIG. 2 is a block diagram of an ammonia injection system of the integrated gradient dust removal and denitration apparatus shown in FIG. 1;
FIG. 3 is a structural diagram of a pre-dedusting system of the integrated gradient dedusting and denitration device shown in FIG. 1;
FIG. 4 is a structural diagram of a grading electric dust removing system of the integrated gradient dust removing and denitration device shown in FIG. 1.
In the figure: 1. an ammonia injection system; 1-1, an ammonia water spray gun; 1-2, an ammonia pump; 1-3, an ammonia water tank;
2. a pre-dust removal system; 2-1, a front diffusion section; 2-2, a deflector; 2-3, a rear diffusion section; 2-4, a dust-blocking flow-equalizing plate;
3. a grading electric dust removal system; 3-1, an outer shell; 3-2, a rapping device; 3-3, ash storage hopper; 3-4, a flashboard door; 3-5, ash discharging seal valve; 3-6, I cathode line; 3-7, I insulating support; 3-8, I high-frequency power supply; 3-9, an anode plate; 3-10, II cathode line; 3-11, II insulating support; 3-12, II high-frequency power supply; 3-13, an air outlet flue; 3-14, a resistance reduction rectifying device; 3-15, a dust cleaning device;
4. a power supply and control system; 5. a denitration catalyst; 6. and (4) a bracket.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in FIG. 1, for the embodiment of the utility model provides a pair of integral type gradient dust removal, denitrification facility, including spouting ammonia system 1, dust pelletizing system 2, hierarchical electrostatic precipitator system 3, power and control system 4 and denitration catalyst 5 in advance.
As shown in figure 2, the ammonia injection system 1 comprises an ammonia water spray gun 1-1, an ammonia water pump 1-2 and an ammonia water tank 1-3. The ammonia water spray guns 1-1 are installed in a flue gas inlet of a front diffusion section 2-1 of the pre-dedusting system 2, the installation number of the ammonia water spray guns 1-1 is determined according to the amount of treated flue gas, and the ammonia water spray guns 1-1 are uniformly arranged on the cross section of the front diffusion section 2-1. The ammonia water pump 1-2 and the ammonia water tank 1-3 are arranged outside the pre-dedusting system 2, the inlet of the ammonia water pump 1-2 is connected with the ammonia water tank 1-3, and the outlet of the ammonia water pump 1-2 is connected with the ammonia water spray gun 1-1.
As shown in FIG. 3, the pre-dedusting system 2 comprises a front diffuser section 2-1, a flow guide plate 2-2, a rear diffuser section 2-3 and a dust-blocking flow-equalizing plate 2-4. The top of the front diffusion section 2-1 is provided with a flue gas inlet, the bottom of the front diffusion section 2-1 is connected with the top of the rear diffusion section 2-3, the joint of the front diffusion section 2-1 and the rear diffusion section 2-3 is provided with a partition plate with an opening in the middle, the opening of the partition plate is provided with a guide plate 2-2, a dust blocking flow equalizing plate 2-4 is arranged at the rear part of the rear diffusion section 2-3, and the rear part of the rear diffusion section 2-3 is communicated with the grading electric dust removal system 3.
As shown in FIG. 4, the grading electric dust removing system 3 comprises an outer shell 3-1, an ash storage hopper 3-3 and an air outlet flue 3-13, wherein the front part of the outer shell 3-1 is connected with the rear part of a rear diffusion section 2-3, the rear part of the outer shell 3-1 is connected with the air outlet flue 3-13, and the ash storage hopper 3-3 is arranged at the bottom of the outer shell 3-1. An anode plate 3-9 is arranged in the outer shell 3-1, a I-level power supply system is arranged at the front part of the anode plate 3-9, a II-level power supply system is arranged at the rear part of the anode plate 3-9, the I-level power supply system and the II-level power supply system are respectively connected with a power supply and control system 4, the power supply and control system 4 respectively supplies power to the I-level power supply system and the II-level power supply system according to the concentration distribution characteristics of dust in smoke, and the controller efficiently operates. The I-level power supply system comprises an I cathode line 3-6 and an I high-frequency power supply 3-8, and the II-level power supply system comprises an II cathode line 3-10 and an II high-frequency power supply 3-12. The I cathode wire 3-6 and the II cathode wire 3-10 are respectively arranged at the front part and the rear part of the anode plate 3-9, the I high-frequency power supply 3-8 is arranged at the top of the outer shell 3-1 and is connected with the I cathode wire 3-6 through a power line, and the II high-frequency power supply 3-12 is arranged at the top of the outer shell 3-1 and is connected with the II cathode wire 3-10 through a power line. The grading electric dust removal system 3 supplies power according to the gradient of the dust concentration in the flue gas in a grading way.
The denitration catalyst 5 is installed inside the air outlet flues 3-13.
The flue gas to be treated enters the integrated gradient dust removal and denitration device from the inlet of the front diffusion section 2-1 of the pre-dust removal system 2, sequentially flows through the pre-dust removal system 2 and the grading electric dust removal system 3, and is exhausted through the gas outlet flue 3-13 after NOx is removed under the catalytic action of the denitration catalyst 5. The pre-dedusting system 2 removes large particles in the dust; the grading electric dust removal system supplies power to the flue gas flow field respectively according to the dust concentration distribution characteristics, so that the dust removal efficiency is improved, and dust is further removed; the flue gas without most dust enters an outlet flue 3-13 of a grading electric dust removal system 3, and NH of the flue gas is sprayed under the catalytic action of a denitration catalyst 5 in the outlet flue 3-133React with NOx in the flue gas to generate water and nitrogen, and the integrated dust removal and denitration functions are realized.
Further preferably, in the embodiment, the I-grade power supply system further comprises an I insulating support 3-7, the II-grade power supply system further comprises an II insulating support 3-11, the I insulating support 3-7 and the II insulating support 3-11 are both installed in the outer shell 3-1, the I insulating support 3-7 is located on the upper portion of the I cathode wire 3-6 and used for supporting a power line of the I cathode wire 3-6, and the II insulating support 3-11 is located on the upper portion of the II cathode wire 3-10 and used for supporting a power line of the II cathode wire 3-10.
Further preferably, in the embodiment, the bottom of the pre-dust-removing system 2 is communicated with the ash storage hopper 3-3.
Further preferably, in the present embodiment, the graded electric dust removal system 3 further comprises a rapping device 3-2, and the rapping device 3-2 is used for rapping the anode plate 3-9.
Further preferably, in the embodiment, the graded electric dust removal system 3 further comprises a gate plate door 3-4 and an ash discharge sealing valve 3-5, the gate plate door 3-4 is installed at the lower part of the ash storage hopper 3-3, and the ash discharge sealing valve 3-5 is installed at the lower part of the gate plate door 3-4.
Further preferably, in the embodiment, a resistance reduction rectifying device 3-14 is arranged at the joint of the outer shell 3-1 and the air outlet flue 3-13, and is used for reducing the local resistance loss when the flue gas flows through.
Further preferably, in the embodiment, according to the denitration efficiency and the concentration of the inlet NOx, 2-4 layers of the catalyst 5 are arranged along the airflow direction, one ash removal device 3-15 is arranged beside each layer of denitration catalyst 5, the ash removal devices 3-15 are connected with a power supply and control system 4, and the power supply and control system 4 supplies power to the ash removal devices 3-15 and controls the ash removal devices to operate efficiently.
Further optimize, in this embodiment, integral type gradient dust removal, denitrification facility still include support 6, and hierarchical electrostatic precipitator system 3 is installed on support 6, and support 6 installs on the ground.
The utility model discloses a theory of operation:
after high-temperature flue gas enters the integrated gradient dedusting and denitration device, ammonia water is pumped out from an ammonia water tank 1-3 by an ammonia water pump 1-2 and sprayed into a front diffusion section 2-1 through an ammonia water spray gun 1-1, the average particle size of ammonia water droplets sprayed out by the ammonia water spray gun 1-1 is smaller than 80 microns and is uniformly distributed in the horizontal section of the front diffusion section 2-1, and the ammonia water is rapidly evaporated and uniformly mixed with the flue gas. After the flue gas enters from the front diffusion section 2-1, the flow section is gradually enlarged, the flow velocity of the flue gas is gradually reduced, the flue gas enters the rear diffusion section 2-3, the flow velocity of the flue gas is reduced again, the flow direction of the flue gas is turned by 90 degrees, dust particles with larger particle sizes are not easy to turn due to the action of inertia force, collide on a bottom plate or a guide plate 2-2 of the rear diffusion section 2-3, and finally flow into the ash storage hopper 3-3 along the bottom plate of the rear diffusion section 2-3. After passing through the pre-dedusting system 2, about 20% of the dust in the flue gas is removed. The dust blocking flow equalizing plate 2-4 enables the pre-dedusted flue gas to uniformly flow into the grading electric dedusting system 3, in the grading electric dedusting system 3, a high-voltage electrostatic field is formed between the cathode lines 3-6 and 3-10 of the I and the cathode lines 3-10 of the II and the anode plates 3-9, the electrostatic field enables the gas flowing through the inside of the electrostatic field to be ionized, the ionized electrons are adsorbed on dust particles, the charged dust particles move to the anode plates 3-9 under the driving of the electric field force and are deposited on the anode plates 3-9, after a certain thickness is reached, the vibrating device 3-2 vibrates the anode plates 3-9, the deposited dust falls into the dust storage hopper 3-3 from the anode plates 3-9, and the integrated gradient dedusting and denitration device is discharged through the gate plate 3-4 and the dust discharge sealing valve 3-5. After passing through the grading electric dust removal system 3, about 85% of dust is removed, about 15% of dust containing dust enters the denitration catalyst 5, the dust concentration is greatly reduced, the catalyst 5 cannot be blocked, the risk of poisoning of the catalyst 5 is also reduced, and through two-stage dust removal, large particles in flue gas are basically and completely removed, so that the abrasion of the dust to the catalyst 5 is greatly reduced. Meanwhile, most of CaO and alkaline earth metal are removed, and the risk of poisoning of the denitration catalyst 5 is reduced.
The utility model has the advantages that:
the flue gas that gets into hierarchical electrical dust removal system 3 flows along with backward, and the dust is collected gradually, and the dust concentration in the flue gas reduces gradually, and the dust concentration in the flue gas is one of the main factor of deciding flue gas impedance, and this scheme divides hierarchical electrical dust removal system 3's flue gas into front and back two parts, adopts different power supply system according to the impedance size of flue gas, makes power supply system and flue gas characteristic more accord with, has guaranteed to pass through hierarchical electrical dust removal system 3 after, can detach 85% dust.
The denitration catalyst 5 is arranged in the air outlet flue 3-13, a contraction section of an outlet of an electric dust remover, a connection section of the electric dust remover and the denitration reactor and a diffusion section of an inlet of the denitration reactor are omitted, the local pressure loss is reduced, the resistance reduction rectifying device 3-14 arranged in the air outlet flue 3-13 reduces the local resistance loss when smoke flows through, and the overall resistance is smaller than 600Pa according to engineering tests.
The resistance reduction rectifying devices 3-14 positioned on the upper part of the catalyst 5 also have the functions of adjusting the direction of the air flow to be consistent with the direction of the channel of the denitration catalyst 5 and uniformly distributing the air flow to the whole surface of the catalyst, so that the denitration catalyst 5 is prevented from being worn due to bias flow of the flue gas, and the blockage of the catalyst channel caused by ash deposition in a low flow velocity area due to uneven distribution of local air flow is avoided.
Spraying ammonia systemThe system 1 is arranged on the front diffusion section 2-1, and NH evaporated from the sprayed ammonia water3Fully mixing the pre-dust removing system 2 and the grading electric dust removing system 3, and adding NH3Achieves good mass transfer effect with the flue gas, ensures that the removal efficiency of NOx is more than 90 percent, and ensures that the concentration of the NOx flowing out of the integrated gradient dust removal and denitration device reaches 20-50mg/Nm3The following.
The power supply and control system 4 can track the impedance of each power supply area in real time, and adjust the power supply voltage according to the impedance, so that the grading electric dust removal system 3 can exert higher efficiency. The power supply and control system 4 also controls the ash removal devices 3 to 15, so that the surface of the denitration catalyst 5 is always kept clean, and the efficiency of the denitration catalyst 5 is well exerted.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (10)
1. An integrated gradient dust removal and denitration device is characterized by comprising an ammonia spraying system (1), a pre-dust removal system (2), a grading electric dust removal system (3), a power supply and control system (4) and a denitration catalyst (5);
the ammonia spraying system (1) comprises an ammonia water spray gun (1-1);
the pre-dedusting system (2) comprises a front diffusion section (2-1) and a rear diffusion section (2-3), a flue gas inlet is formed in the top of the front diffusion section (2-1), the ammonia water spray gun (1-1) is installed in the flue gas inlet of the front diffusion section (2-1), the bottom of the front diffusion section (2-1) is connected with the top of the rear diffusion section (2-3), and the rear part of the rear diffusion section (2-3) is communicated with the grading electric dedusting system (3);
the grading electric dust removal system (3) comprises an external shell (3-1), an ash storage hopper (3-3) and an air outlet flue (3-13), the front part of the external shell (3-1) is connected with the rear part of the rear diffusion section (2-3), the rear part of the external shell (3-1) is connected with the air outlet flue (3-13), and the ash storage hopper (3-3) is installed at the bottom of the external shell (3-1); an anode plate (3-9) is installed in the outer shell (3-1), a I-level power supply system is arranged at the front part of the anode plate (3-9), a II-level power supply system is arranged at the rear part of the anode plate (3-9), the I-level power supply system and the II-level power supply system are respectively connected with the power supply and control system (4), and the power supply and control system (4) respectively supplies power to the I-level power supply system and the II-level power supply system according to the distribution characteristics of dust concentration in flue gas;
the denitration catalyst (5) is arranged inside the air outlet flues (3-13).
2. The integrated gradient dust-removing and denitration device according to claim 1, wherein the I-stage power supply system comprises I cathode wires (3-6) and I high-frequency power supplies (3-8), and the II-stage power supply system comprises II cathode wires (3-10) and II high-frequency power supplies (3-12); the I cathode wire (3-6) and the II cathode wire (3-10) are respectively arranged at the front part and the rear part of the anode plate (3-9), the I high-frequency power supply (3-8) is arranged at the top of the outer shell (3-1) and is connected with the I cathode wire (3-6) through a power line, and the II high-frequency power supply (3-12) is arranged at the top of the outer shell (3-1) and is connected with the II cathode wire (3-10) through a power line.
3. The integrated gradient dust removal and denitration device according to claim 2, wherein the I-grade power supply system further comprises I insulation supports (3-7), the II-grade power supply system further comprises II insulation supports (3-11), the I insulation supports (3-7) and the II insulation supports (3-11) are both arranged in the outer shell (3-1), the I insulation supports (3-7) are positioned at the upper parts of the I cathode lines (3-6) and used for supporting power supply wires of the I cathode lines (3-6), and the II insulation supports (3-11) are positioned at the upper parts of the II cathode lines (3-10) and used for supporting power supply wires of the II cathode lines (3-10).
4. The integrated gradient dust removal and denitration device according to claim 1, wherein the pre-dust removal system (2) further comprises a flow guide plate (2-2) and a dust blocking flow equalizing plate (2-4); a baffle plate with an opening in the middle is arranged at the joint of the front diffusion section (2-1) and the rear diffusion section (2-3), the guide plate (2-2) is arranged at the opening of the baffle plate, and the dust blocking flow equalizing plate (2-4) is arranged at the rear part of the rear diffusion section (2-3).
5. The integrated gradient dust and denitration device according to claim 1 or 4, wherein the bottom of the pre-dust removing system (2) is communicated with the ash storage hopper (3-3).
6. The integrated gradient dust removal and denitration device according to claim 1, wherein the ammonia injection system (1) further comprises an ammonia water pump (1-2) and an ammonia water tank (1-3) which are arranged outside the pre-dust removal system (2), an inlet of the ammonia water pump (1-2) is connected with the ammonia water tank (1-3), and an outlet of the ammonia water pump (1-2) is connected with the ammonia water spray gun (1-1).
7. The integrated gradient dust and denitration device according to claim 1, wherein the grading electric dust removing system (3) further comprises a rapping device (3-2), and the rapping device (3-2) is used for rapping the anode plate (3-9).
8. The integrated gradient dust-removing and denitration device according to claim 1, wherein the grading electric dust-removing system (3) further comprises a shutter door (3-4) and an ash-discharging sealing valve (3-5), the shutter door (3-4) is installed at the lower part of the ash storage hopper (3-3), and the ash-discharging sealing valve (3-5) is installed at the lower part of the shutter door (3-4).
9. The integrated gradient dust and denitration device according to claim 1, wherein a resistance-reducing rectifying device (3-14) is arranged at the joint of the outer shell (3-1) and the outlet flue (3-13).
10. The integrated gradient dust removal and denitration device according to claim 1, wherein the denitration catalyst (5) is arranged in a plurality of layers along the airflow direction, and a dust removal device (3-15) is arranged beside each layer of denitration catalyst (5).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116764436A (en) * | 2023-06-26 | 2023-09-19 | 浙江大维高新技术股份有限公司 | Cement kiln flue gas treatment equipment and treatment process |
| CN117643793A (en) * | 2023-09-28 | 2024-03-05 | 浙江新澄宇环境科技有限公司 | Dust removal denitrification facility |
-
2020
- 2020-10-30 CN CN202022485821.2U patent/CN213853893U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116764436A (en) * | 2023-06-26 | 2023-09-19 | 浙江大维高新技术股份有限公司 | Cement kiln flue gas treatment equipment and treatment process |
| CN116764436B (en) * | 2023-06-26 | 2024-04-30 | 浙江大维高新技术股份有限公司 | Cement kiln flue gas treatment equipment and treatment process |
| CN117643793A (en) * | 2023-09-28 | 2024-03-05 | 浙江新澄宇环境科技有限公司 | Dust removal denitrification facility |
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