CN112370952B - Factory-used waste gas desulfurization and denitrification treatment device - Google Patents
Factory-used waste gas desulfurization and denitrification treatment device Download PDFInfo
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- CN112370952B CN112370952B CN202010973594.XA CN202010973594A CN112370952B CN 112370952 B CN112370952 B CN 112370952B CN 202010973594 A CN202010973594 A CN 202010973594A CN 112370952 B CN112370952 B CN 112370952B
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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
- B01D53/74—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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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
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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Abstract
The invention discloses a factory waste gas desulfurization and denitrification treatment device which comprises an exhaust fan and a chimney, wherein an air inlet of the exhaust fan is communicated with a boiler pipeline, an air outlet pipeline of the exhaust fan is connected with an electric dust collector, an air outlet of the electric dust collector is communicated with a washing device pipeline, an air outlet of the washing device is communicated with a desulfurization and denitrification device pipeline, an air outlet of the desulfurization and denitrification device is communicated with an air inlet pipeline of an air swirler, and an air outlet of the air swirler is communicated with an air inlet pipeline below the side wall of the chimney. According to the invention, the electric dust remover is sequentially adopted to remove dust from dust-containing flue gas, the scrubber is used to wash and filter the flue gas, the desulfurization and denitrification device is used to desulfurize and denitrate the flue gas, the air cyclone is used to recover the product and the flue gas is discharged from the chimney, so that the desulfurization and denitrification efficiency and effect are improved, the product can be reused as a chemical fertilizer, and the resource utilization rate is improved.
Description
Technical Field
The invention relates to a factory waste gas desulfurization and denitrification treatment device, and belongs to the technical field of desulfurization and denitrification devices.
Background
At present, in the prior art, devices for desulfurization and denitrification of flue gas are various, but more SO3 and ammonia are generated in the treatment process to escape, the generated sulfate can block an air preheater and corrode downstream equipment, and an independent desulfurization and denitrification system is complex in combination control, and has the defects of more occupied land, low efficiency, high operation energy consumption and the like. Sulfur dioxide and nitrogen oxide are one of the world-recognized atmospheric pollutants and are another main reason for forming acid rain, photochemical smog and influencing the ecological environment, the emission of sulfur dioxide and nitrogen oxide is increased year by year, high importance is attracted to the world and the country, and the control of the emission of the sulfur dioxide and the nitrogen oxide becomes the important importance of energy conservation and emission reduction, and the solution is urgently needed.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides the plant waste gas desulfurization and denitrification treatment device, which improves the desulfurization and denitrification efficiency and effect, enables the product to be reused as a chemical fertilizer, and improves the resource utilization rate.
The technical scheme adopted by the invention is as follows:
the utility model provides a mill uses waste gas desulfurization denitration treatment device, includes air exhauster and chimney, air exhauster air intake and boiler pipe way intercommunication, and the air outlet pipe connection of air exhauster has electric precipitator, and electric precipitator's gas outlet and scrubber pipeline intercommunication, the gas outlet and the SOx/NOx control device pipeline intercommunication of scrubber, SOx/NOx control device's gas outlet and air swirler's air inlet pipeline intercommunication, air swirler's gas outlet and the air inlet pipeline intercommunication of chimney lateral wall below.
Preferably, an air inlet pipe is arranged on one side of the washer, the other side of the washer is of a round table structure, an air outlet pipe is arranged on the round table structure, a liquid collecting tank is formed downwards in the middle of the bottom of the washer, a baffle plate is obliquely and upwards arranged above the liquid collecting tank towards one side of the air outlet pipe, washing liquid is filled in the washer between the baffle plate and the air inlet pipe, the tail end of the air inlet pipe vertically extends downwards to the position below the liquid level of the washing liquid, two screen plates are symmetrically arranged in the liquid collecting tank along the front end and the rear end, a filler plate which extends to the top of the washer and can be passed through by gas is arranged between the two screen plates, a buffer plate is arranged in the round table structure of the washer, and the bottom end of the buffer plate is obliquely arranged towards the air outlet pipe; a flushing pipe horizontally extending into the washer is further arranged above the air outlet pipe and communicated with the water supply pipeline, a first flow regulating valve electrically connected with the control device is arranged on the flushing pipe, and a spray head is arranged at the tail end of the flushing pipe.
Further preferably, a first liquid level meter used for detecting the liquid level of the washing liquid is further arranged on the washing device below the air inlet pipe, a second liquid level meter is further arranged on one side of the liquid collecting tank, a circulating pump is further arranged on the other side of the liquid collecting tank, a water inlet of the circulating pump is communicated with a liquid pipeline of the liquid collecting tank, a water outlet of the circulating pump is communicated with the washing liquid pipeline in the washing device between the baffle and the air inlet pipe, a third flow regulating valve electrically connected with a control device is arranged on a water outlet pipeline of the circulating pump, and a first liquid discharge pipe are respectively arranged at the bottom of the washing device between the baffle and the air inlet pipe and the bottom of the liquid collecting tank.
Preferably, the desulfurization and denitrification device comprises a reactor, a plurality of electron beam generators and a gas mixing chamber which are arranged on the side wall of the reactor, wherein a plurality of partition plates are vertically arranged in the reactor, the plurality of partition plates are respectively positioned between two adjacent electron beam generators, one of the two adjacent partition plates is fixed with the top of the reactor, the other partition plate is fixed with the bottom of the reactor, a spray pipe is arranged at the top of the reactor, a plurality of branch pipes which respectively extend into the reactor are arranged on the spray pipe, the branch pipes respectively correspond to the electron beam generators, a liquid distributor is arranged at the tail ends of the branch pipes, a flow regulating valve IV which is electrically connected with a control device is arranged on the spray pipe, a discharging pipe is further arranged at the bottom of the reactor, an air inlet of the gas mixing chamber is communicated with an air outlet pipeline of a washer, a plurality of connecting pipes are arranged between the gas mixing chamber and the reactor, an air inlet pipe which extends into the gas mixing chamber is arranged at the top of the gas mixing chamber, a gas distribution disc is arranged at the tail end of the ammonia gas inlet pipe which is positioned in the gas mixing chamber, and a flow regulating valve II which is electrically connected with the control device is arranged on the air inlet pipe outside the gas mixing chamber.
Further preferably, the electron beam generating device comprises a power supply and an electron accelerator, the power supply is used for supplying power to the electron accelerator to generate an electron beam, and the electron beam is diffused and irradiated into the reactor through an irradiation window arranged on the reactor and acts on the gas in the reactor.
Further preferably, a flow equalizer is further arranged in one end of the reactor close to one side of the gas mixing chamber.
Further preferably, the discharge pipe and the discharge opening of the air cyclone are connected with a recovery device.
Further preferably, a flow regulating valve V electrically connected with the control device is further arranged on the discharging pipe.
Preferably, an ammonia gas online detector is further arranged on a pipeline between the air outlet of the air cyclone and the air inlet below the side wall of the chimney, and the ammonia gas online detector is used for detecting the content of ammonia gas in the gas and transmitting the detected data to the control device for display.
Further preferably, a gas distributor is further provided at the end of the gas inlet pipe extending below the liquid level of the washing liquid.
The invention has the beneficial effects that:
firstly, an electric dust remover is used for removing dust from dust-containing flue gas, then the scrubber is used for washing and filtering the flue gas, the flue gas is subjected to desulfurization and denitrification treatment through a desulfurization and denitrification device, products are recovered through an air swirler, and the flue gas is discharged through a chimney, so that the desulfurization and denitrification efficiency and effect are improved; the flue gas reacts with ammonia gas and water under the irradiation of the electron beams generated by the electron beam generating device to generate ammonium sulfate and ammonium nitrate, and the recovered ammonium sulfate and ammonium nitrate can be reused as chemical fertilizers, so that the resource utilization rate is improved.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic diagram of the scrubber;
FIG. 3 is a schematic structural diagram of a desulfurization and denitrification device and a gas mixing chamber;
FIG. 4 is a schematic structural diagram of an electron beam generating apparatus;
the main reference numerals in the figures have the following meanings:
1. an exhaust fan, 2, a chimney, 3, an electric dust remover, 4, a scrubber, 5, a desulfurization and denitrification device, 6, an air cyclone, 7, a gas mixing chamber, 8, a recovery device, 9, an ammonia gas online detector, 41, an air inlet pipe, 42, an air outlet pipe, 43, a liquid collecting tank, 44, a baffle, 45, a screen plate, 46, a filler plate, 47, a buffer plate, 48, a flushing pipe, 49, a flow regulating valve I, 410, a liquid level meter I, 411, a liquid level meter II, 412, a circulating pump, 413, a liquid discharge pipe I, 414, a liquid discharge pipe, 415, a gas distributor, 416, a flow regulating valve III, 417, a spray head, 51, a reactor, 52, an electron beam generating device, 53, a partition plate, 54, a spray pipe, 55, a branch pipe, 56, a liquid distributor, 57, a flow regulating valve IV, 58, a power supply, 59, an electronic accelerator, 510, a uniform air inlet pipe, 511, a discharge pipe, 512, a flow regulating valve V, 71, a connecting pipe, 72, an ammonia gas inlet pipe, 73, a gas distribution disc, 74 and a flow regulating valve II.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
As shown in fig. 1-4: this embodiment is a mill uses waste gas desulfurization denitration treatment device, including air exhauster 1 and chimney 2, 1 air intake of air exhauster and boiler pipe way intercommunication, the air outlet pipe connection of air exhauster 1 has electrostatic precipitator 3, electrostatic precipitator 3's gas outlet and 4 pipeline intercommunications of scrubber, 5 pipeline intercommunications of gas outlet and SOx/NOx control device of scrubber 4, SOx/NOx control device 5's gas outlet and air swirler 6's air inlet pipeline intercommunication, air swirler 6's gas outlet and 2 lateral wall below air inlet pipeline intercommunications of chimney.
Referring to fig. 2, one side of the scrubber 4 is provided with an air inlet pipe 41, the other side of the scrubber 4 is of a circular truncated cone structure, and an air outlet pipe 42 is arranged on the circular truncated cone structure, a liquid collecting tank 43 is formed downwards at the middle position of the bottom of the scrubber 4, a baffle 44 is obliquely and upwards arranged above the liquid collecting tank 43 and towards one side of the air outlet pipe 42, the scrubber 4 between the baffle 44 and the air inlet pipe 41 is filled with scrubbing liquid, the tail end of the air inlet pipe 41 vertically extends downwards to below the liquid level of the scrubbing liquid, and the tail end of the air inlet pipe 41 extending to below the liquid level of the scrubbing liquid is also provided with a gas distributor 415; two screen plates 45 are symmetrically arranged in the liquid collecting tank 43 along the front and rear end directions, a packing plate 46 which extends to the top of the scrubber 4 and can be passed by gas is arranged between the two screen plates 45, a buffer plate 47 is arranged in the circular truncated cone-shaped structure of the scrubber 4, and the bottom end of the buffer plate 47 is obliquely arranged towards the gas outlet pipe 42; a flushing pipe 48 horizontally extending to the interior of the washer 4 is further arranged above the air outlet pipe 42, the flushing pipe 48 is communicated with the water supply pipeline, a first flow regulating valve 49 electrically connected with the control device is arranged on the flushing pipe 48, and a spray head 417 is arranged at the tail end of the flushing pipe 48.
Referring to fig. 2, a first liquid level meter 410 for detecting the liquid level of the washing liquid is further arranged on the washing device 4 below the air inlet pipe 41, a second liquid level meter 411 is further arranged on one side of the liquid collecting tank 43, a circulating pump 412 is further arranged on the other side of the liquid collecting tank 43, a water inlet of the circulating pump 412 is communicated with a liquid pipeline of the liquid collecting tank 43, a water outlet of the circulating pump 412 is communicated with the washing liquid pipeline in the washing device 4 between the baffle 44 and the air inlet pipe 41, a flow regulating valve third 416 electrically connected with a control device is arranged on a water outlet pipeline of the circulating pump 412, a first liquid discharge pipe 413 and a first liquid discharge pipe 414 are respectively arranged at the bottom of the washing device 4 between the baffle 44 and the air inlet pipe 41 and at the bottom of the liquid collecting tank 43, and during actual use, the liquid level in each part of the washing device 4 can be guaranteed to be stable by controlling the flow of the first flow regulating valve 49, the third flow regulating valve 416 and the first liquid discharge pipe 413.
Referring to fig. 3, the desulfurization and denitrification apparatus 5 includes a reactor 51, a plurality of electron beam generators 52 and a gas mixing chamber 7 disposed on a side wall of the reactor 51, a plurality of partition plates 53 are vertically disposed in the reactor 51, the plurality of partition plates 53 are respectively located between two adjacent electron beam generators 52, one of the two adjacent partition plates is fixed to a top of the reactor 51, the other is fixed to a bottom of the reactor 51, a shower pipe 54 is disposed on a top of the reactor 51, a plurality of branch pipes 55 respectively extending into the reactor 51 are disposed on the shower pipe 54, the branch pipes 55 are respectively disposed corresponding to the electron beam generators 52, a liquid distributor 56 is disposed at a terminal of the branch pipe 55, a four flow regulating valve 57 electrically connected to a control device is disposed on the shower pipe 54, a discharge pipe 511 is further disposed at a bottom of the reactor 51, a gas inlet of the gas mixing chamber 7 is communicated with a gas outlet pipe of the scrubber 4, a plurality of connecting pipes 71 are disposed between the gas mixing chamber 7 and the reactor 51, a gas inlet pipe 72 extending into the gas mixing chamber 7 is disposed at a top of the gas mixing chamber 7, and a gas inlet pipe 73 is disposed on an outer side of the gas mixing chamber 7 and electrically connected to the gas inlet pipe 72.
Referring to fig. 4, the electron beam generating device 52 includes a power supply 58 and an electron accelerator 59, the power supply 58 is used for supplying power to the electron accelerator 59 to generate an electron beam, and the electron beam is diffused and irradiated into the reactor 51 through an irradiation window formed on the reactor 51 and acts on the gas in the reactor 51.
Referring to fig. 3, a flow equalizer 510 is further provided inside one end of the reactor 51 on the side close to the gas mixing chamber 7.
As shown in fig. 1 and 3, the discharge pipe 511 and the discharge port of the air cyclone 6 are both connected to a recovery device 8, and a flow control valve five 512 electrically connected to the control device is further disposed on the discharge pipe 511.
Referring to fig. 1, an ammonia gas online detector 9 is further disposed on a pipeline between an air outlet of the air cyclone 6 and an air inlet below a side wall of the chimney 2, and the ammonia gas online detector 9 is configured to detect ammonia gas content in the air and transmit detected data to the control device for display.
The working principle of the invention is as follows:
after the exhaust fan 1 pumps the flue gas to the electric dust collector 3 for dust removal, dust is discharged from an opening at the bottom of the electric dust collector 3 and collected, the flue gas after dust removal enters the interior of the scrubber 4 through the gas outlet of the electric dust collector 3, the flue gas passes through the gas inlet pipe 41 and is dispersed into washing liquid through the gas distributor 415, and then rises and filters moisture and residual smoke dust entrained in the flue gas through the filler plate 46, the gas passing through the filler plate 46 further washes liquid sprayed out through the end spray nozzle 417 of the flushing pipe 48 and then enters the gas mixing chamber 7, and the liquid sprayed out through the end spray nozzle 417 of the flushing pipe 48 can not only wash the flue gas but also effectively wash the filler plate 46; flue gas entering the gas mixing chamber 7 is fully mixed with ammonia gas entering through an ammonia gas inlet pipe 72 and distributed through a gas distribution disc 73, then enters the reactor 51 through a plurality of connecting pipes 71 and is uniformly distributed through a flow equalizer 510, a power supply 58 supplies power to the electron accelerator 59 to generate electron beams, the electron beams are subjected to diffusion type irradiation through irradiation windows arranged on the reactor 51 and act on mixed gas in the reactor 51, the mixed gas reacts under the action of water sprayed by a liquid distributor 56 at the tail end of a branch pipe 55 to generate ammonium sulfate and ammonium nitrate, then the flue gas is subjected to desulfurization and denitrification treatment, the gas subjected to the desulfurization and denitrification treatment further separates the ammonium sulfate and the ammonium nitrate entrained in the gas through an air swirler 6 and is discharged through a bottom discharge port, and the gas is conveyed to a chimney 2 through a gas outlet at the top of the air swirler 6 and is discharged.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.
Claims (8)
1. The utility model provides a mill uses exhaust gas desulfurization denitration treatment device, includes air exhauster (1) and chimney (2), its characterized in that: an air inlet of the exhaust fan (1) is communicated with a boiler pipeline, an air outlet pipeline of the exhaust fan (1) is connected with an electric dust collector (3), an air outlet of the electric dust collector (3) is communicated with a pipeline of a washer (4), an air outlet of the washer (4) is communicated with a pipeline of a desulfurization and denitrification device (5), an air outlet of the desulfurization and denitrification device (5) is communicated with an air inlet pipeline of an air swirler (6), and an air outlet of the air swirler (6) is communicated with an air inlet pipeline below the side wall of the chimney (2);
one side of the washer (4) is provided with an air inlet pipe (41), the other side of the washer (4) is of a circular truncated cone structure, an air outlet pipe (42) is arranged on the circular truncated cone structure, a liquid collecting tank (43) is formed downwards in the middle of the bottom of the washer (4), a baffle (44) is obliquely and upwards arranged above the liquid collecting tank (43) and faces one side of the air outlet pipe (42), washing liquid is filled in the washer (4) between the baffle (44) and the air inlet pipe (41), the tail end of the air inlet pipe (41) vertically and downwards extends to the position below the liquid level of the washing liquid, two screen plates (45) are symmetrically arranged in the liquid collecting tank (43) along the front and rear end directions, a filling plate (46) which extends to the top of the washer (4) and can allow gas to pass through is arranged between the two screen plates (45), a buffer plate (47) is arranged in the circular truncated cone structure of the washer (4), and the bottom end of the buffer plate (47) is obliquely arranged towards the air outlet pipe (42); a flushing pipe (48) horizontally extending to the interior of the washer (4) is further arranged above the air outlet pipe (42), the flushing pipe (48) is communicated with a water supply pipeline, a first flow regulating valve (49) electrically connected with a control device is arranged on the flushing pipe (48), and a spray head (417) is arranged at the tail end of the flushing pipe (48);
the washing machine is characterized in that a first liquid level meter (410) used for detecting the liquid level of washing liquid is further arranged on the washing machine (4) below the air inlet pipe (41), a second liquid level meter (411) is further arranged on one side of the liquid collecting tank (43), a circulating pump (412) is further arranged on the other side of the liquid collecting tank (43), a water inlet of the circulating pump (412) is communicated with a liquid pipeline of the liquid collecting tank (43), a water outlet of the circulating pump (412) is communicated with the washing liquid pipeline in the washing machine (4) between the baffle plate (44) and the air inlet pipe (41), a third flow regulating valve (416) electrically connected with a control device is arranged on a water outlet pipeline of the circulating pump (412), and a first liquid discharge pipe (413) and a first liquid discharge pipe (414) are respectively arranged at the bottom of the washing machine (4) between the baffle plate (44) and the air inlet pipe (41) and at the bottom of the liquid collecting tank (43).
2. The plant-used flue gas desulfurization and denitrification apparatus according to claim 1, wherein the desulfurization and denitrification apparatus (5) comprises a reactor (51), a plurality of electron beam generators (52) and a gas mixing chamber (7) disposed on the sidewall of the reactor (51), a plurality of partition plates (53) are vertically disposed in the reactor (51), the plurality of partition plates (53) are respectively located between two adjacent electron beam generators (52), one of the two adjacent partition plates is fixed to the top of the reactor (51), the other is fixed to the bottom of the reactor (51), a shower pipe (54) is disposed at the top of the reactor (51), a plurality of branch pipes (55) are disposed on the shower pipe (54) and respectively extend to the inside of the reactor (51), the branch pipes (55) are respectively disposed corresponding to the electron beam generators (52), a liquid distributor (56) is disposed at the end of the branch pipe (55), a flow regulating valve (57) electrically connected to a control device is disposed on the shower pipe (54), a plurality of gas inlet pipes (511) of the gas mixing chambers (7) are disposed between the gas washing chambers (511), and a plurality of gas mixing chambers (7) are communicated with a discharge pipe (71) disposed between the reactor (51), the top of the gas mixing chamber (7) is provided with an ammonia gas inlet pipe (72) extending into the gas mixing chamber (7), the tail end of the ammonia gas inlet pipe (72) positioned in the gas mixing chamber (7) is provided with a gas distribution disc (73), and the ammonia gas inlet pipe (72) at the outer side of the gas mixing chamber (7) is provided with a flow regulating valve II (74) electrically connected with a control device.
3. The plant flue gas desulfurization and denitrification processing apparatus according to claim 2, wherein the electron beam generating device (52) comprises a power supply (58) and an electron accelerator (59), the power supply (58) is used for supplying power to the electron accelerator (59) to generate an electron beam, and the electron beam is diffused and irradiated into the reactor (51) through an irradiation window formed in the reactor (51) and acts on the gas in the reactor (51).
4. The plant flue gas desulfurization and denitrification processing apparatus according to claim 2, wherein a flow equalizer (510) is further provided inside one end of the reactor (51) on the side close to the gas mixing chamber (7).
5. The plant flue gas desulfurization and denitrification apparatus according to claim 2, wherein a recovery device (8) is connected to each of the discharge pipe (511) and the discharge opening of the air cyclone (6).
6. The desulfurization and denitrification facility for factory exhaust gas according to claim 2, wherein said discharge pipe (511) is further provided with a flow control valve V (512) electrically connected to a control device.
7. The plant flue gas desulfurization and denitrification treatment device according to claim 1, wherein an ammonia gas online detector (9) is further arranged on a pipeline between the air outlet of the air cyclone (6) and the air inlet below the side wall of the chimney (2), and the ammonia gas online detector (9) is used for detecting the content of ammonia gas in the gas and transmitting the detected data to the control device for display.
8. A plant flue gas desulfurization and denitration treatment apparatus according to claim 1, wherein a gas distributor (415) is further provided at the end of the gas inlet pipe (41) extending below the liquid surface of the washing liquid.
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| CN202010973594.XA CN112370952B (en) | 2020-09-16 | 2020-09-16 | Factory-used waste gas desulfurization and denitrification treatment device |
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| CN202010973594.XA CN112370952B (en) | 2020-09-16 | 2020-09-16 | Factory-used waste gas desulfurization and denitrification treatment device |
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| CN112370952A CN112370952A (en) | 2021-02-19 |
| CN112370952B true CN112370952B (en) | 2022-11-08 |
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| CN113198616A (en) * | 2021-04-23 | 2021-08-03 | 广东速科环保科技有限公司 | Smoke purifier with automatic cleaning device and method for automatically cleaning smoke |
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