CN115400584A - Denitration tower tail gas purification treatment device and method - Google Patents
Denitration tower tail gas purification treatment device and method Download PDFInfo
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- CN115400584A CN115400584A CN202211137306.2A CN202211137306A CN115400584A CN 115400584 A CN115400584 A CN 115400584A CN 202211137306 A CN202211137306 A CN 202211137306A CN 115400584 A CN115400584 A CN 115400584A
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- B01D—SEPARATION
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
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- 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
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- 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
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Abstract
The invention provides a denitration tower tail gas purification treatment device and a method, wherein the device comprises a denitration tower body and a circulation loop; the top of the denitration tower body is connected with an exhaust pipe; the top of the exhaust pipe is provided with a tail gas discharge channel and a circulating treatment channel at intervals, and the interior of the exhaust pipe is provided with a switching mechanism for switching the conduction of the tail gas discharge channel or the circulating treatment channel according to the comparison result of the concentration of nitrogen oxides in the flue gas in the exhaust pipe and a set threshold value; circulation processing passageway is connected to circulation return circuit one end, and the other end inserts the intake pipe of denitration tower body lateral wall below. Through the switching mechanism who sets up, switch on independent and parallel exhaust emission passageway and circulation treatment passageway according to the testing result of flue gas to the tail gas that can discharge carries out secondary purification to whole denitration tower once more through circulation loop, until tail gas satisfies emission standard, does not increase other extra equipment structure, can simply reform transform on original equipment basis, realizes the purification treatment to tail gas.
Description
Technical Field
The invention relates to the field of denitration treatment of fire coal, in particular to a denitration tower tail gas purification treatment device and method.
Background
Coal-fired flue gas pollution is an important factor influencing atmospheric environment and is one of important causes causing haze in China, so that the national emission requirement on flue gas is increasingly strict, and in order to reduce the emission of nitrogen oxides in the flue gas and reach the required limit value, the problem of how to strengthen flue gas denitration is urgently solved in the field of environmental protection.
The current emission to the flue gas is usually handled to the denitration tower, the ammonia that utilizes ammonium bicarbonate thermal decomposition to produce is as the reductant, it handles to carry out the denitration to the flue gas to realize being full of granular active carbon denitration tower, the denitration tower is handling the flue gas and is arranging according to setting for the flue gas handling capacity, but in actual processing process, along with the change of coal-fired kind and power, can influence the nitrogen oxide content in the flue gas, thereby the flue gas that leads to after handling normally reaches standard, need the reverse adjustment of condition according to the denitration among the prior art, influence production, meanwhile after operation a period, the catalyst leads to denitration efficiency to descend because the smoke and dust adsorbs, also can influence the emission condition of final flue gas.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a denitration tower tail gas purification treatment device and method, which are ingenious in structure and reasonable in design, can completely ensure standard emission, prolong the service life and improve the denitration treatment efficiency.
The invention is realized by the following technical scheme:
the invention provides a tail gas purification treatment device of a denitration tower, which comprises a denitration tower body and a circulation loop, wherein the denitration tower body is provided with a denitration tower inlet;
the top of the denitration tower body is connected with an exhaust pipe; the top of the exhaust pipe is provided with a tail gas discharge channel and a circulating treatment channel at intervals, and a switching mechanism is arranged in the exhaust pipe and used for switching the conduction of the tail gas discharge channel or the circulating treatment channel according to the comparison result of the concentration of nitrogen oxides in the flue gas in the exhaust pipe and a set threshold value;
circulation circuit one end is connected the circulation and is handled the passageway, and the other end inserts the intake pipe of denitration tower body lateral wall below.
Optionally, a partition plate is fixedly arranged inside the exhaust pipe, the partition plate is located above the switching mechanism, and two parts of pipelines of the exhaust pipe, which are separated by the partition plate, are respectively connected with the exhaust emission channel and the circulation treatment channel.
Optionally, the switching mechanism includes a turnover motor, a connecting shaft and a blocking disc;
the turnover motor is fixed outside the exhaust pipe, the output end radially penetrates through the exhaust pipe and is fixed with a connecting shaft, a blocking disc is fixed on the side face of the connecting shaft along a bus, the edge of the blocking disc can be attached to the inner wall of the exhaust pipe in a sealing mode, and the partition plate is located above the connecting shaft and arranged along the direction of the connecting shaft bus.
Optionally, the blocking disc is semicircular, and the diameter end of the blocking disc is connected with the connecting shaft.
Optionally, the top of the denitration tower body is connected with an exhaust pipe through a conical connecting pipe, and a tail gas detector is arranged on the conical connecting pipe; the tail gas detector is internally provided with a detection probe, the detection end of the detection probe is inserted into the conical connecting pipe and extends towards the axis, and the output end of the detection probe is connected with the control end of the turnover motor through a controller.
Optionally, the circulation loop includes a connection passage, a connection pipe, and a check valve sequentially connected between the circulation treatment passage and the intake pipe.
Optionally, a backwashing mechanism is further included; the backwashing mechanism comprises a supporting plate fixed on the surface of the denitration tower body, a fan arranged at the top of the supporting plate and an air duct arranged at an air outlet of the fan; the other end of the air duct is communicated with the lower part of the exhaust pipe.
Optionally, a tower base is fixed at the bottom of the denitration tower body, and a buffer layer is arranged at the bottom of the tower base.
The invention also provides a denitration tower tail gas purification treatment method, which comprises the following steps,
acquiring the concentration of nitrogen oxides in flue gas in an exhaust pipe;
comparing the concentration of the nitrogen oxides with a set emission threshold value, and sending a comparison result to the switching mechanism;
the switching mechanism receives a signal which meets the emission threshold, then the tail gas emission channel is conducted, the circulating treatment channel is closed, and the flue gas is discharged;
switching mechanism receives the signal that surpasss the emission threshold value, then switches on the circulation and handles the passageway, closes the exhaust emission passageway, and flue gas circulation gets into the denitration tower body through the intake pipe and carries out purification treatment once more.
Optionally, a backwashing step is also included; when the continuous conduction time of the circulating channel reaches a set threshold value, a backwashing mechanism is started to clean and blow catalyst particles in the denitration tower body.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the scheme of the invention, the independent and parallel tail gas discharge channel and the circulating treatment channel are conducted according to the detection result of the flue gas through the arranged switching mechanism, so that the discharged tail gas can be purified for the whole denitration tower again through the circulating loop until the tail gas meets the discharge standard, other additional equipment structures are not added, the simple transformation can be carried out on the basis of the original equipment, and the tail gas purification treatment is realized.
Furthermore, the switching mechanism adopts a simple blocking disc and a simple turnover motor to realize the selective closing or opening of the two channels, and the arrangement of the partition board is matched to ensure the separation of the flue gas in the exhaust pipe; and the positive and negative rotation control of the motor is realized through the tail gas detector and the controller, and the partition plate is turned over.
Further, through the provided backwashing mechanism, the cleaning and blowing can be realized under the condition that the purification efficiency is reduced, the service life of the catalyst is prolonged, and the purification efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a partial view of FIG. 2 of the present invention;
FIG. 4 is a second perspective view of the present invention from FIG. 2;
FIG. 5 is a flow chart of a denitration tower tail gas purification treatment method of the invention;
in the figure: 1. a denitration tower body; 2. an air inlet pipe; 3. a tower base; 4. an exhaust pipe; 5. a tapered connecting pipe; 6. an exhaust gas detector; 7. detecting a probe; 8. a tail gas discharge passage; 9. a circulation processing channel; 10. a partition plate; 11. turning over a motor; 12. a connecting shaft; 13. blocking the disc; 14. a connecting channel; 15. connecting pipes; 16. a one-way valve; 17. a support plate; 18. a fan; 19. an air duct; 20. and a controller.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The invention provides the following technical scheme: a tail gas purification treatment device of a denitration tower comprises a denitration tower body 1 and a circulation loop;
the top of the denitration tower body 1 is connected with an exhaust pipe 4; the top of the exhaust pipe 4 is provided with a tail gas discharge channel 8 and a circulating treatment channel 9 in a separated manner, and a switching mechanism is arranged in the exhaust pipe 4 and used for switching the conduction of the tail gas discharge channel 8 or the circulating treatment channel 9 according to the comparison result of the concentration of nitrogen oxides in the flue gas in the exhaust pipe 4 and a set threshold value;
In this preferred embodiment, as shown in fig. 1, an air inlet pipe 2 in a denitration tower body 1 is used to communicate with flue gas to be treated outside, the flue gas is purified and denitrated by a treatment structure in the denitration tower body 1 and is discharged through an exhaust pipe 4 at the top, the discharged tail gas can be detected by a detection assembly in the discharging process, the channel in the exhaust pipe 4, which is communicated with a tail gas discharge channel 8, of the denitration tower body 1 is blocked by judging that the tail gas does not accord with the discharge standard, the discharged tail gas is transmitted into a circulation treatment channel 9 through the other side of a switching mechanism, and the circulation treatment channel 9 is transmitted into the air inlet pipe 2 through a circulation loop, so as to form a treatment cycle, and the tail gas is discharged through the tail gas discharge channel 8 after conforming to the discharge standard.
As shown in fig. 1 and 4, the circulation circuit includes a connection passage 14, a connection pipe 15, and a check valve 16, which are connected in this order between the circulation processing passage 9 and the intake pipe 2.
In the preferred embodiment, the circulation loop can sequentially transmit the tail gas to be purified to the connecting channel 14 and the connecting pipe 15 through the circulation treatment channel 9, and finally input the tail gas into the air inlet pipe 2 to form a treatment and purification circulation, and the check valve 16 arranged between the connecting pipe 15 and the air inlet pipe 2 can effectively prevent the initial flue gas from being reversely transmitted into the exhaust pipe 4 through the connecting pipe 15.
Wherein the bottom of the denitration tower body 1 is fixed with a tower base 3, and the bottom of the tower base 3 is provided with a buffer layer; the tower base 3 with the buffer layer can improve the stability of the whole denitration tower body 1 structure.
The exhaust pipe 4 is arranged as shown in fig. 2, a partition plate 10 is fixedly arranged inside the exhaust pipe 4, the partition plate 10 is positioned above the switching mechanism, and two parts of pipelines of the exhaust pipe 4 separated by the partition plate 10 are respectively connected with the exhaust emission channel 8 and the circulation treatment channel 9.
As shown in fig. 2, a partition 10 is disposed in the middle of the exhaust pipe 4, and the exhaust emission channel 8 and the circulation treatment channel 9 are separated by the partition 10, so as to distinguish the emission of the flue gas.
Wherein, the switching mechanism comprises a turnover motor 11, a connecting shaft 12 and a blocking disc 13.
The turnover motor 11 is fixed outside the exhaust pipe 4, the output end radially runs through the exhaust pipe 4 and is fixed with a connecting shaft 12, the side of the connecting shaft 12 is fixed with a blocking disc 13 along a bus, the edge of the blocking disc 13 can be attached and sealed with the inner wall of the exhaust pipe 4, and the partition plate 10 is located above the connecting shaft 12 and is arranged along the bus direction of the connecting shaft 12.
Specifically, the connecting shaft 12 with the fixed output end is driven to rotate by the overturning motor 11 in the switching mechanism, so that the blocking disc 13 fixed on the surface of the connecting shaft 12 is overturned to the left side of the partition plate 10, and the blocking disc 13 can seal the tail gas discharge channel 8 to prevent the tail gas from overflowing.
As shown in fig. 3, the blocking disc 13 is semicircular, and the diameter end of the blocking disc 13 is connected to the connecting shaft 12, specifically, the blocking disc 13 is semicircular, so that the blocking disc 13 can realize the switching effect.
The top of the denitration tower body 1 is connected with an exhaust pipe 4 through a conical connecting pipe 5, and a tail gas detector 6 is arranged on the conical connecting pipe 5; a detection probe 7 is arranged in the tail gas detector 6, the detection end of the detection probe 7 is inserted into the conical connection pipe 5 and extends towards the axis, and the output end of the detection probe is connected with the control end of the turnover motor 11 through a controller 20.
In this preferred embodiment, tapered connecting pipe 5 that has the draft taper is used for connecting denitration tower body 1 and blast pipe 4, utilizes tail gas detector 6 to detect each index of tail gas of emission, and runs through tapered connecting pipe 5 and can improve the precision that detects to the test probe 7 that extends in tapered connecting pipe 5, and controller 20 can control upset motor 11, and the degree of automation of improvement device is used manpower sparingly.
The treatment device also comprises a backwashing mechanism; the backwashing mechanism comprises a supporting plate 17 fixed on the surface of the denitration tower body 1, a fan 18 arranged on the top of the supporting plate 17, and an air duct 19 arranged at an air outlet of the fan 18; the other end of the air duct 19 is communicated with the lower part of the exhaust pipe 4.
As shown in fig. 4, the back washing mechanism can utilize a fan 18 mounted on the top of a support plate 17 fixed on the surface of the denitration tower body 1 to generate high-pressure air, and the high-pressure air is transmitted into the exhaust pipe 4 through an air duct 19, so that the air is transmitted from top to bottom in the denitration tower body 1 through the exhaust pipe 4, and the purification structure in the denitration tower body 1 is reversely washed to avoid blockage.
The invention also provides a denitration tower tail gas purification treatment method, as shown in fig. 5, comprising the following steps:
obtaining the concentration of nitrogen oxides in the flue gas in the exhaust pipe 4;
comparing the concentration of the nitrogen oxides with a set emission threshold value, and sending a comparison result to the switching mechanism;
when the switching mechanism receives a signal meeting the emission threshold, the tail gas emission channel 8 is conducted, the circulation treatment channel 9 is closed, and the flue gas is discharged;
switching mechanism receives the signal that surpasss the emission threshold value, then switches on circulation treatment passageway 9, closes exhaust emission passageway 8, and the flue gas circulation gets into denitration tower body 1 through intake pipe 2 and carries out purification treatment once more.
In the specific embodiment of the invention, the concentration of nitrogen oxide in the flue gas in the exhaust pipe 4 is obtained through the detection probe, the concentration of nitrogen oxide is compared with a set emission threshold, the comparison result is sent to the switching mechanism, the exhaust emission channel 8 is conducted if the comparison result meets the emission standard, the circulation treatment channel 9 is closed to discharge the flue gas, if the comparison result does not meet the emission standard, the circulation treatment channel 9 is conducted, the exhaust emission channel 8 is closed, the flue gas circulates through the air inlet pipe 2 to enter the denitration tower body 1 for secondary purification treatment, and therefore the circulation treatment of the tail gas which does not meet the standard is realized.
Wherein, the method also comprises a backwashing step; when the continuous conduction time of the circulating channel reaches a set threshold value, a backwashing mechanism is started to clean and blow the catalyst particles in the denitration tower body 1.
In the specific embodiment of the invention, when the continuous conduction time of the circulating channel reaches the set threshold, the backwashing mechanism is started to clean and blow the catalyst particles in the denitration tower body 1, so that the blockage is prevented, and the working efficiency of the denitration tower is improved.
According to the scheme, an air inlet pipe 2 is connected to the lower portion of the side wall of a denitration tower body 1, an exhaust pipe 4 is connected to the top of the denitration tower body 1, an exhaust gas discharge channel 8 and a circulation treatment channel 9 are connected to the top of the exhaust pipe 4, a switching mechanism is arranged in the exhaust pipe 4, a detection assembly is arranged below the exhaust pipe 4, the other end of the circulation treatment channel 9 is communicated with the air inlet pipe 2 through a connection assembly, a backwashing mechanism is arranged on the surface of the denitration tower body 1 and communicated with the exhaust pipe 4, the switching mechanism comprises a turnover motor 11, the turnover motor 11 is arranged on the surface of the exhaust pipe 4, the output end of the turnover motor 11 penetrates through the exhaust pipe 4 and is fixed with a connecting shaft 12, a blocking disc 13 is fixed to the surface of the connecting shaft 12, the blocking disc 13 is attached to the inner wall of the exhaust pipe 4, a partition plate 10 is fixed to the inner wall of the exhaust pipe 4, and the partition plate 10 is located above the connecting shaft 12.
The whole purification treatment device is reasonable in structure arrangement, ingenious in conception and flexible in use, can detect tail gas discharged by the denitration tower and judge whether the tail gas meets the emission standard, once the tail gas does not meet the emission standard, the discharged tail gas is led to the whole denitration tower body again through the circulation loop by using the switching mechanism in the device for secondary purification until the tail gas meets the emission standard, and meanwhile, the purification structure in the denitration tower can be reversely flushed by using wind by using the backwashing mechanism, so that the convenience of treatment of blockage of the purification structure is improved, and the device has strong practicability and market application prospect; the method comprises the following steps of communicating an air inlet pipe 2 in a denitration tower body with external flue gas to be treated, purifying and denitrating the flue gas through a treatment structure in the denitration tower body, discharging the flue gas through an exhaust pipe 4 at the top, detecting the discharged tail gas by using a tail gas detector in the discharging process, judging whether the flue gas meets the discharge standard, driving a connecting shaft fixed at the output end of the connecting shaft to rotate by using a turnover motor in a switching mechanism once the flue gas does not meet the discharge standard, turning a blocking disc fixed on the surface of the connecting shaft to the left side of a partition plate, blocking a channel in the exhaust pipe communicated with the denitration tower body and a tail gas discharge channel, transmitting the discharged tail gas into a circulation treatment channel through the other side of the switching mechanism, transmitting the circulation treatment channel into the air inlet pipe through a circulation loop, forming a treatment cycle until the tail gas meets the discharge standard and is discharged through the tail gas discharge channel;
meanwhile, in the scheme of the invention, a backwashing mechanism can utilize a fan 18 arranged at the top of a support plate 17 fixed on the surface of a denitration tower body 1 to generate high-pressure air and transmit the high-pressure air into an exhaust pipe 4 through an air duct 19, so that the air is transmitted from top to bottom in the denitration tower body 1 through the exhaust pipe 4, a purification structure in the denitration tower body 1 is backwashed to avoid blockage, a tapered connecting pipe 5 with a draft taper is used for connecting the denitration tower body 1 and the exhaust pipe 4, each index of the discharged tail gas is detected by using a tail gas detector 6, a detection probe 7 penetrating through the tapered connecting pipe 5 and extending into the tapered connecting pipe 5 can improve the detection precision, a circulation loop can sequentially transmit the tail gas to be purified to a connecting channel 14 and a connecting pipe 15 through a circulation processing channel 9 and finally input into an air inlet pipe 2 to form a circulation for purification processing, a one-way valve 16 arranged between the connecting pipe 15 and the air inlet pipe 2 can effectively prevent the initial flue gas from being reversely transmitted into the exhaust pipe 4 through the connecting pipe 15, a controller 20 arranged at the top of the support plate 17 can control a turning motor 11, the degree of automation of the device is improved, the degree, the manual work of the baffle plate 3, the baffle plate 13 can be arranged in the denitration tower body, and the whole blockage of the denitration tower body, and the baffle plate 13 can be matched to realize the blockage effect of the denitration tower body.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The tail gas purification treatment device of the denitration tower is characterized by comprising a denitration tower body (1) and a circulation loop;
the top of the denitration tower body (1) is connected with an exhaust pipe (4); the top of the exhaust pipe (4) is provided with a tail gas discharge channel (8) and a circulating treatment channel (9) in a separated mode, and a switching mechanism is arranged inside the exhaust pipe (4) and used for switching the tail gas discharge channel (8) or the circulating treatment channel (9) to be conducted according to the comparison result of the concentration of nitrogen oxides in the flue gas in the exhaust pipe (4) and a set threshold value;
circulation treatment passageway (9) is connected to circulation return circuit one end, and the other end inserts intake pipe (2) of denitration tower body (1) lateral wall below.
2. The tail gas purification treatment device for the denitration tower according to claim 1, wherein a partition plate (10) is fixedly arranged inside the exhaust pipe (4), the partition plate (10) is positioned above the switching mechanism, and two parts of pipelines of the exhaust pipe (4) separated by the partition plate (10) are respectively connected with the tail gas discharge channel (8) and the circulation treatment channel (9).
3. The denitration tower tail gas purification treatment device according to claim 2, wherein the switching mechanism comprises a turnover motor (11), a connecting shaft (12) and a blocking disc (13);
upset motor (11) are fixed in blast pipe (4) outside, and the output radially runs through blast pipe (4) and is fixed with even axle (12), the side of even axle (12) is fixed with stifled dish (13) along the generating line, the edge of stifled dish (13) can be sealed with blast pipe (4) inner wall laminating, baffle (10) are located even axle (12) top and set up along even axle (12) generating line direction.
4. The denitration tower tail gas purification treatment device according to claim 3, wherein the blocking disc (13) is semicircular, and the diameter end of the blocking disc is connected with the connecting shaft (12).
5. The tail gas purification treatment device of the denitration tower according to claim 3, wherein the top of the denitration tower body (1) is connected with the exhaust pipe (4) through a conical connecting pipe (5), and the conical connecting pipe (5) is provided with a tail gas detector (6); the tail gas detection device is characterized in that a detection probe (7) is arranged in the tail gas detection instrument (6), the detection end of the detection probe (7) is inserted into the conical connection pipe (5) and extends towards the axis, and the output end of the detection probe is connected with the control end of the turnover motor (11) through a controller (20).
6. The denitration tower tail gas purification treatment device according to claim 1, wherein the circulation loop comprises a connecting channel (14), a connecting pipe (15) and a one-way valve (16) which are sequentially connected between the circulation treatment channel (9) and the gas inlet pipe (2).
7. The denitration tower tail gas purification treatment device of claim 1, further comprising a backwashing mechanism; the backwashing mechanism comprises a supporting plate (17) fixed on the surface of the denitration tower body (1), a fan (18) arranged at the top of the supporting plate (17), and an air duct (19) arranged at an air outlet of the fan (18); the other end of the air duct (19) is communicated with the lower part of the exhaust pipe (4).
8. The tail gas purification treatment device of the denitration tower according to claim 1, wherein a tower base (3) is fixed at the bottom of the denitration tower body (1), and a buffer layer is arranged at the bottom of the tower base (3).
9. A denitration tower tail gas purification treatment method is characterized by comprising the following steps,
obtaining the concentration of nitrogen oxides in the flue gas in the exhaust pipe (4);
comparing the concentration of the nitrogen oxides with a set emission threshold value, and sending a comparison result to the switching mechanism;
when the switching mechanism receives a signal meeting the emission threshold, the tail gas emission channel (8) is conducted, the circular treatment channel (9) is closed, and the smoke is discharged;
switching mechanism receives the signal that surpasss the emission threshold value, then switches on circulation treatment passageway (9), closes exhaust emission passageway (8), and flue gas circulation gets into denitration tower body (1) through intake pipe (2) and carries out purification treatment once more.
10. The denitration tower tail gas purification treatment method according to claim 9, further comprising a backwashing step; when the continuous conduction time of the circulating channel reaches a set threshold value, a backwashing mechanism is started to clean and blow catalyst particles in the denitration tower body (1).
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| CN202211137306.2A CN115400584A (en) | 2022-09-19 | 2022-09-19 | Denitration tower tail gas purification treatment device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115814575A (en) * | 2022-12-23 | 2023-03-21 | 浙江东油能源科技有限公司 | Efficient and sufficient methanol steam recycling equipment |
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| JPH04338217A (en) * | 1991-05-14 | 1992-11-25 | Kyushu Electric Power Co Inc | Method for controlling catalyst for denitrator of flue gas in thermal power plant |
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| CN204042072U (en) * | 2014-07-10 | 2014-12-24 | 宝山钢铁股份有限公司 | Electronic three-way switch valve is used in sinter fume circulation |
| CN107754608A (en) * | 2017-11-24 | 2018-03-06 | 江苏科技大学 | A kind of circulation of tail gas reprocessing device of ship denitrating system based on SCR |
| CN109570154A (en) * | 2019-02-02 | 2019-04-05 | 上海通和海天材料科技有限公司 | A kind of SCR reactor deashing device peculiar to vessel and application method |
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