CN112023570A - Sequential control method for smoke spraying - Google Patents
Sequential control method for smoke spraying Download PDFInfo
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- CN112023570A CN112023570A CN202010649543.1A CN202010649543A CN112023570A CN 112023570 A CN112023570 A CN 112023570A CN 202010649543 A CN202010649543 A CN 202010649543A CN 112023570 A CN112023570 A CN 112023570A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
- B01D2247/08—Means for controlling the separation process
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Abstract
The invention discloses a time sequence control method of smoke spraying, which belongs to the field of environmental protection and comprises the following steps of 1, cooling and concentrating smoke by a prewashing tower; step 2, entering a desulfurizing tower for contact, washing and absorption; and 3, enabling the flue gas to enter a demister, and removing the flue gas which is changed into clean flue gas. According to the invention, automatic judgment is carried out by the system, and automatic spraying opening is realized, so that the production organization capacity is greatly improved, the operation intensity is reduced, the spraying flow is increased, the functions of flue gas cooling, dust removal and the like are achieved, qualified flue gas parameters are provided for the next process, the production control capacity is effectively improved, and the standard emission is realized.
Description
Technical Field
The invention belongs to the field of environmental protection, and particularly relates to a sequential control method for smoke spraying.
Background
With the implementation of the new national environmental protection law and the atmospheric pollution prevention law, the law enforcement of the environmental protection competent departments of the government is continuously increased, in steel production enterprises, if a desulfurization system is shut down due to failure, the whole upstream and downstream production systems must be shut down for coordination treatment, otherwise, the enterprises bear huge environmental protection legal risks and high penalties, and in order to meet enterprise responsibilities and obligations in the aspects of energy conservation and emission reduction, environmental protection management and the like of the Kun steel, the 300m new area of the Kun steel is subjected to the enterprise responsibilities and obligations in the aspects of energy conservation and emission reduction, environmental protection management2The sintering flue gas desulfurization is technically improved, and flue gas is fully contacted with spray liquid through transformation, so that the temperature, dust and the like of the flue gas are reduced, the requirements of relevant parameters of the next procedure are met, and the national emission requirement is met.
Original atomizer is through 20 manual control of valve 20 spraying branch pipes, when the valve is opened, the branch pipe of opening just begins to spray, 2 sprays can be opened simultaneously, on-the-spot defogging pump is direct start and full speed operation, because the control of 20 valves is carried out manual opening by the operator according to flue gas volume and pH value, the change that leads to between the time rain parameter of opening does not have timely adjustment, if long-time same spraying branch pipe of opening, it is unsatisfactory directly to lead to whole interior fog effect of tower, the cooling dust removal effect is not good, and can lead to the risk that other branch pipes that do not for a long time increase the jam.
Disclosure of Invention
According to the invention, automatic judgment is carried out by the system, and automatic spraying opening is realized, so that the production organization capacity is greatly improved, the operation intensity is reduced, the spraying flow is increased, the functions of flue gas cooling, dust removal and the like are achieved, qualified flue gas parameters are provided for the next process, the production control capacity is effectively improved, and the standard emission is realized.
In order to realize the purpose, the invention is realized by adopting the following technical scheme: the sequential control method of the smoke spraying comprises the following steps of 1, cooling and concentrating smoke by a prewashing tower; step 2, entering a desulfurizing tower for contact, washing and absorption; and 3, enabling the flue gas to enter a demister, and removing the flue gas which is changed into clean flue gas.
Preferably, the system for realizing the control method mainly comprises a temperature transmitter, a PH detection device, a differential pressure densimeter, a pressure transmitter, a flow transmitter, a differential pressure level meter and other instruments, wherein the two temperature transmitters are respectively installed at an inlet and an outlet of a demister, the flow transmitter is installed on a demisting flushing water pipeline, the PH meter and the densimeter are installed on a circulating pipeline of a prewashing tower, the PH meter has an automatic cleaning function, the two differential pressure transmitters are installed at the bottom of the prewashing tower, all the instruments have a signal remote transmission function, real-time monitoring can be carried out in a central control room, according to the monitoring data, flushing control is automatically carried out according to a design time sequence, and a flushing mode is selected by an operator independently.
Preferably, the flue gas and the cooling water in the step 1 are in countercurrent contact in the prewashing tower, and uniform distribution and fine atomization along the section of the tower are realized through the main pipe, the branch pipes and the atomizing nozzles, so that good gas-liquid contact is ensured.
Preferably, the prewashing tower include that conveying circulation groove, defogging pump, branch pipe valve, defogging house steward, defogging branch pipe, prewashing cell body, the branch pipe valve is connecting defogging house steward and defogging branch pipe, the defogging branch pipe always has 20, installs the branch pipe valve on every defogging branch pipe, always has 20 valves to carry out effectual matching.
Preferably, effectively manage and control 20 branch pipe valves, adjust according to the condition of flue gas volume and PH, branch pipe valve 3 will carry out effectual opening through the system and close, open interval time will be calculated and appraised by the flue gas volume.
Preferably, in order to ensure that ammonium sulfate in a subsequent ammonium sulfate working section can be efficiently cooked and crystallized, the PH is required to be kept at 5.0-6.0 as much as possible, the density is about 1.2, the temperature of flue gas at the outlet of a prewashing tower is kept below 65 ℃, the PH and the density are measured and fed back in real time according to the running condition of the production process, single-pipe automatic flushing or double-pipe automatic flushing can be selected manually by an operator or automatically by a system, demisting flushing valves are divided into an upper layer and a lower layer, the single-pipe flushing starts from a first valve at the lower layer, the last valve at the upper layer is finished, the single-pipe flushing is opened and closed in sequence, the double-pipe flushing starts from the first valve at the lower layer and the last valve at the.
Preferably, the demisting branch pipe automatically realizes single-pipe flushing and double-pipe flushing, a program starts the single-pipe flushing and the double-pipe flushing, all valves are closed, the program exits, all valves are closed, F1-F20 and F time slices can be set as a time sequence setting table in a certain interval by second calculation, and the time sequence setting table comprises the steps of setting time (the same setting time), operating time and displaying steps F1 to F20 and F of 40 steps (single pipe) and double pipe (20) in total.
Preferably, the flushing time after the valve is opened is 10 minutes, the next valve is opened again at an interval of 10 seconds after the flushing is finished, and the double pipe is opened every hour by more than 80 ten thousand cubic meters mainly according to the condition of the amount of the entering smoke. .
The invention has the beneficial effects that:
according to the invention, automatic judgment is carried out by the system, and automatic spraying opening is realized, so that the production organization capacity is greatly improved, the operation intensity is reduced, the spraying flow is increased, the functions of flue gas cooling, dust removal and the like are achieved, qualified flue gas parameters are provided for the next process, the production control capacity is effectively improved, and the standard emission is realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a timing diagram for single tube flushing;
fig. 3 is a timing diagram for a dual flush.
Fig. 4 is a control system diagram.
In the figure, 1, a conveying circulating tank 2, a demisting pump 3, branch pipe valves (20), 4, a demisting header pipe 5, a demisting branch pipe 6 and a prewashing tank body.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
The sequential control method of the smoke spraying comprises the following steps of 1, cooling and concentrating smoke by a prewashing tower; step 2, entering a desulfurizing tower for contact, washing and absorption; and 3, enabling the flue gas to enter a demister, and removing the flue gas which is changed into clean flue gas. The flue gas and the cooling water in the step 1 are in countercurrent contact in the prewashing tower, and the uniform distribution and fine atomization along the cross section of the tower are realized through the main pipe, the branch pipes and the atomizing nozzles, so that good gas-liquid contact is ensured.
This system is mainly by temperature transmitter, PH detection device, differential pressure densimeter, pressure transmitter, flow transmitter, instruments such as differential pressure level gauge constitute, install two temperature transmitter respectively at defroster exit, install flow transmitter on the defogging wash water pipeline, install PH meter and densimeter on prewashing tower circulating line, wherein the PH meter has the self-cleaning function, two differential pressure formula transmitters are installed to the prewashing tower bottom, all instruments all have the signal teletransmission function, can be in well accuse room real-time supervision, according to above-mentioned monitoring data, wash control and go on according to the design chronogenesis is automatic, and by operating personnel autonomous selection washing mode. The control part adopts an ABB WinCS redundancy control system.
In original production organizational process, the transport circulation groove 1 is that the liquid to in the prewashing cell body 6 carries out effectual circulation and collects, and the device that the backward flow was used, defogging pump 2 are in full speed running state always, and branch pipe valve 3 is connecting defogging house steward 4 and defogging branch pipe 5, and defogging branch pipe 5 always has 20, installs branch pipe valve 3 on every defogging branch pipe 5, and the total has 20 valves to carry out effectual matching. For the production operation in-process, the operator will all judge the time of opening and closing the branch pipe valve according to relevant parameter and self experience, the standard of production organization can not be better unified, can not give full play to the effect of 20 branch pipe sprays, can not effectually utilize the prewashing tower to carry out abundant contact, make the flue gas just can't reach the effect of cooling dust removal, long-time operation will lead to the valve switch in-process to appear the switch not in place, even lead to the atomising head to block up, very big reduction production efficiency, increase the emission risk.
Washing water of a demister of a prewashing tower comes from a desulfurizing tower, the demister mainly realizes functions of flue gas cooling, demisting, dedusting, prewashing water and the like, in order to ensure that ammonium sulfate in a subsequent ammonium sulfate working section can be efficiently cooked and crystallized, the PH is required to be kept between 5.0 and 6.0 as much as possible, the density is about 1.2, the temperature of the flue gas at the outlet of the prewashing tower is kept below 65 ℃, according to the operation condition of a production process, the PH and the density are fed back in real-time measurement, single-pipe automatic washing or double-pipe automatic washing can be selected manually by an operator or automatically by a system, demisting washing valves are divided into an upper layer and a lower layer, the single-pipe washing starts from a first valve at the lower layer, a last valve at the upper layer is ended, the opening and the closing are carried out in sequence, the double-pipe washing starts.
Through earlier stage operation, the original equipment is combined, the 20 branch pipe valves 3 are effectively controlled and controlled, adjustment is carried out according to the conditions of smoke gas amount and PH, production energy consumption is saved, manual control is reduced, the branch pipe valves 3 are effectively opened and closed through the system, the opening interval time is calculated and evaluated according to the smoke gas amount, single pipe flushing and double pipe flushing can be automatically realized simultaneously, a program starts to wash single pipes and double pipes, all valves are closed, the program exits, all valves are closed, F1, F20 and F time slices can be set as a time sequence setting table in a certain interval by second calculation, the steps of setting time (same setting time), running time, displaying the total steps of F1 to F20 and F, namely 40 steps (single pipe) and double pipes (20) are provided, automatic judgment is carried out through the system, automatic spraying opening is realized, and production organization capacity is greatly improved, the operation intensity is reduced, the spraying flow is increased, the functions of flue gas cooling, dust removal and the like are achieved, qualified flue gas parameters are provided for the next process, the production control capacity is effectively improved, and standard emission is realized.
The temperature is reduced from about 150 ℃ to about 60 ℃ according to the PH of the solution in the prewashing tower, the liquid level of the prewashing tower and the temperature of the flue gas, such as: the liquid level is lower than 3 meters or the temperature of the flue gas is higher than 70 ℃, the double-tube spraying is started, the starting time is higher than 10 minutes, the liquid level is higher than 4.5 meters, the single-tube spraying is started, the starting time is less than 5 minutes, and the starting and closing time can be adjusted within a certain range by an operator.
The flushing time is 10 minutes after the valve is opened, the next valve is opened again at an interval of 10 seconds after the flushing is finished, which is mainly determined according to the condition of the amount of the entering smoke, and a double pipe is opened at an hour of more than 80 million cubic meters.
Claims (8)
1. A time sequence control method for smoke spraying is characterized in that: the sequential control method of the smoke spraying comprises the following steps of 1, cooling and concentrating smoke by a prewashing tower; step 2, entering a desulfurizing tower for contact, washing and absorption; and 3, enabling the flue gas to enter a demister, and removing the flue gas which is changed into clean flue gas.
2. A time sequence control method for smoke spraying is characterized in that: the system for realizing the control method mainly comprises a temperature transmitter, a PH detection device, a differential pressure densimeter, a pressure transmitter, a flow transmitter, a differential pressure level meter and other instruments, wherein the two temperature transmitters are respectively installed at an inlet and an outlet of a demister, the flow transmitter is installed on a demisting flushing water pipeline, the PH meter and the densimeter are installed on a circulating pipeline of a prewashing tower, the PH meter has an automatic cleaning function, the two differential pressure transmitters are installed at the bottom of the prewashing tower, all the instruments have a signal remote transmission function, real-time monitoring can be carried out in a central control room, according to the monitoring data, flushing control is automatically carried out according to a design time sequence, and a flushing mode is selected by an operator independently.
3. The sequential control method of smoke spraying according to claim 1, characterized in that: the flue gas and the cooling water in the step 1 are in countercurrent contact in the prewashing tower, and the uniform distribution and fine atomization along the cross section of the tower are realized through the main pipe, the branch pipes and the atomizing nozzles, so that good gas-liquid contact is ensured.
4. A method of sequential control of smoke spray according to claim 1 or 3, characterised in that: the prewashing tower include delivery cycle groove, defogging pump, branch pipe valve, defogging house steward, defogging branch pipe, prewashing cell body, the branch pipe valve is connecting defogging house steward and defogging branch pipe, the defogging branch pipe has 20 always, installs the branch pipe valve on every defogging branch pipe, always 20 valves carry out effectual matching.
5. The sequential control method of flue gas spraying according to claim 4, characterized in that: the 20 branch pipe valves are effectively controlled and adjusted according to the conditions of the smoke volume and the PH, the branch pipe valves 3 are effectively opened and closed through the system, and the opening interval time is calculated and evaluated according to the smoke volume.
6. The sequential control method of smoke spraying according to claim 5, characterized in that: in order to ensure that ammonium sulfate in a subsequent ammonium sulfate working section can be efficiently cooked and crystallized, the PH is required to be kept at 5.0-6.0 as much as possible, the density is about 1.2, the temperature of flue gas at the outlet of a prewashing tower is kept below 65 ℃, the PH and the density are measured and fed back in real time according to the operation condition of the production process, single-pipe automatic flushing or double-pipe automatic flushing can be selected manually or automatically by an operator by a system, demisting flushing valves are divided into an upper layer and a lower layer, the single-pipe flushing starts from a first valve at the lower layer, the last valve at the upper layer is ended, the single-pipe flushing is opened and closed in sequence, the double-pipe flushing starts from the first valve at the lower layer and the last valve at.
7. The method for controlling the timing of the smoke spraying according to any one of claims 1, 3, 5 and 6, wherein: the demisting branch pipe automatically realizes single-pipe flushing and double-pipe flushing, a program starts single-pipe flushing and double-pipe flushing, all valves are closed, the program exits, all valves are closed, F1-F20 and F time slices can be set as a time sequence setting table in a certain interval by second calculation, and the time sequence setting table comprises 40 steps (single pipe) and double-pipe (20) of setting time (same setting time), running time and display steps F1 to F20 and F.
8. The sequential control method of flue gas spraying according to claim 6, characterized in that: the flushing time after the valve is opened is 10 minutes, the next valve is opened again at an interval of 10 seconds after the flushing is finished, which is mainly determined according to the condition of the amount of the entering smoke, and a double pipe is opened at an hour of more than 80 ten thousand cubic meters.
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| CN202010649543.1A CN112023570A (en) | 2020-07-08 | 2020-07-08 | Sequential control method for smoke spraying |
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| CN202010649543.1A CN112023570A (en) | 2020-07-08 | 2020-07-08 | Sequential control method for smoke spraying |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201237717Y (en) * | 2008-07-29 | 2009-05-13 | 刘明虎 | Echelon operation control cabinet of solenoid valve |
| CN101934192A (en) * | 2010-09-16 | 2011-01-05 | 江苏和亿昌环保工程科技有限公司 | Double-tower ammonia-method desulfurization process |
| CN106094655A (en) * | 2016-08-17 | 2016-11-09 | 河南省郑州水利学校 | The online dust falling system in construction site and dust-removing method thereof |
| CN209714615U (en) * | 2019-02-25 | 2019-12-03 | 云南天朗节能环保集团有限公司 | A kind of cooling dedusting spraying device of smoke gas treatment |
-
2020
- 2020-07-08 CN CN202010649543.1A patent/CN112023570A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201237717Y (en) * | 2008-07-29 | 2009-05-13 | 刘明虎 | Echelon operation control cabinet of solenoid valve |
| CN101934192A (en) * | 2010-09-16 | 2011-01-05 | 江苏和亿昌环保工程科技有限公司 | Double-tower ammonia-method desulfurization process |
| CN106094655A (en) * | 2016-08-17 | 2016-11-09 | 河南省郑州水利学校 | The online dust falling system in construction site and dust-removing method thereof |
| CN209714615U (en) * | 2019-02-25 | 2019-12-03 | 云南天朗节能环保集团有限公司 | A kind of cooling dedusting spraying device of smoke gas treatment |
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Application publication date: 20201204 |
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