CN111045322A - Automatic control system for injection of cement kiln desulfurizer - Google Patents
Automatic control system for injection of cement kiln desulfurizer Download PDFInfo
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- CN111045322A CN111045322A CN201911376977.2A CN201911376977A CN111045322A CN 111045322 A CN111045322 A CN 111045322A CN 201911376977 A CN201911376977 A CN 201911376977A CN 111045322 A CN111045322 A CN 111045322A
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- 238000002347 injection Methods 0.000 title claims abstract description 57
- 239000007924 injection Substances 0.000 title claims abstract description 57
- 239000004568 cement Substances 0.000 title claims abstract description 17
- 230000001105 regulatory effect Effects 0.000 claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 21
- 238000003860 storage Methods 0.000 claims abstract description 9
- 238000006477 desulfuration reaction Methods 0.000 claims description 19
- 230000023556 desulfurization Effects 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims 14
- 238000007599 discharging Methods 0.000 abstract description 3
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 abstract 3
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 abstract 3
- 230000001276 controlling effect Effects 0.000 abstract 2
- 230000004069 differentiation Effects 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- 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
-
- 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
- B01D53/79—Injecting reactants
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41875—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by quality surveillance of production
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention discloses an automatic control system for injection of cement kiln desulfurizer, which comprises a storage tank body, a rotary kiln system, an injection pump, a frequency converter, a flowmeter, a PID (proportion integration differentiation) regulation system, a central control room, an SO (sulfur oxide) control room2On-line monitoring system, DCS and PID governing system, PID governing system installs in the DCS, and the ejector pump is connected to the holding vessel body, and the flowmeter is connected to the ejector pump, and the rotary kiln system is connected to the flowmeter, and rotary kiln headtotail SO2On-line monitoring system, SO2The on-line monitoring system is connected with a central control room, the central control room is connected with a DCS, the DCS is connected with a frequency converter, the frequency converter is connected with an injection pump, the on-line monitoring system is connected with a central control room, the central control room is connected with a DCS, the DCS is connected with a frequency converter, theThe central control room is provided with SO2Rated value, SO2The output value is compared with the rated value to provide a basis for the PID regulating system to send out a regulating instruction; setting SO by central control room2Rated value, controlling the on-site injection pump to regulate the output flow of the on-site injection pump in real time, saving the consumption of desulfurizer, achieving the purpose of saving cost, and effectively controlling SO2And (5) discharging.
Description
Technical Field
The invention relates to an automatic control system, in particular to an automatic control system for injection of a cement kiln desulfurizer.
Background
With the development of industry and the improvement of living standard of people, the desire for energy is continuously increased, and SO in coal-fired flue gas2Has become a major cause of atmospheric pollution. Reduction of SO2Pollution is the urgent need for atmospheric environmental control nowadays. Many flue gas desulfurization processes have been widely used in industry, and have important practical significance for the treatment of tail gas of various boilers and incinerators. The desulfurizer reduces SO in kiln tail flue gas2The industrial liquid reagent is added into the kiln tail flue gas through a jet pump to react, SO that the purpose of reducing SO is achieved2The purpose of (1). The prior desulfurization method generally comprises three methods, namely desulfurization before combustion, desulfurization during combustion and desulfurization after combustion. Previously, the desulfation jet pump flow was controlled in situ by manual control. The jet pump is frequently adjusted and always kept at a fixed frequency, and SO is found2The frequency of the jet pump can be adjusted only when the change is larger, and the adjustment is lagged, so that the consumption of the desulfurizer is larger, and the cost is higher.
Disclosure of Invention
The invention provides an automatic control system for injection of a desulfurizer in a cement kiln, which aims to solve the problems. The technical scheme adopted by the invention is as follows: an automatic control system for spraying desulfurizer in cement kiln comprises a storage tank, a rotary kiln system, a jet pump, a frequency converter, a flow meter, a PID regulating system, a central control room, and an SO2On-line monitoring system, DCS and PID governing system, PID governing system install in the DCS, the accumulator tank body is connected the jet pump, the jet pump is connected the flowmeter, flowThe meter is connected with the rotary kiln system, and the rotary kiln system is connected with the SO2On-line monitoring system, said SO2The online monitoring system is connected with the central control room, the central control room is connected with the DCS, the DCS is connected with the frequency converter, and the frequency converter is connected with the jet pump.
Further, the injection pump comprises a main desulfurizer injection pump and a standby desulfurizer injection pump, and when the main desulfurizer injection pump fails, the standby desulfurizer injection pump can be immediately started.
Further, the injection pump comprises a main desulfurizer injection pump and a standby desulfurizer injection pump, and the frequency of the main desulfurizer injection pump and the frequency of the standby desulfurizer injection pump are both 50 Hz.
Further, the central control room is connected with the PID adjusting system in the DCS.
Further, the SO2On-line monitoring system monitoring SO2A change in value.
Further, the PID adjusting system outputs an adjusting instruction for the frequency converter.
Further, the central control room is provided with SO2Rated value, SO2The comparison of the output value with the rated value provides a basis for the PID regulating system to send out a regulating command.
Further, the SO2Rated at 120mg/Nm3When said SO is2Actual value exceeds 120mg/Nm3The central control room sends an instruction to the PID regulating system, the PID regulating system outputs an instruction to the frequency converter to increase the frequency of the frequency converter, and the frequency converter regulates the jet pump.
Further, the storage tank body is a cuboid with the length of 4m, the width of 3m and the height of 2m or a cylinder with the radius of 1.1m and the height of 2 m.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention sets SO through the central control room2The automatic control system controls the on-site injection pump to regulate the output flow of the on-site injection pump in real time, so as to save the consumption of the desulfurizer,the purpose of saving cost is achieved.
2. The flow of the desulfurizer is not sprayed in large quantity in the actual operation, SO that the aim of saving the desulfurizer can be achieved, and SO can be effectively controlled2The discharge can be achieved at one stroke.
3. The invention can be used in chemical plants, for example, 1.147kg/t of desulfurizer consumption can be estimated in 2019 of a certain plant, if the desulfurizer consumption can be reduced to 0.895kg/t in 2020, 0.252kg/t of desulfurizer can be saved, and 0.882 yuan/ton of cost can be estimated to be saved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without making any inventive changes.
Fig. 1 is an overall structural view of the present invention.
The corresponding device and equipment names are marked in the attached drawings:
in the figure, 1-storage tank body, 2-rotary kiln system, 3-jet pump, 4-frequency converter, 5-flowmeter, 6-PID regulating system, 7-central control room and 8-SO2Provided is an online monitoring system.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings.
The core of the invention is to provide an automatic control system for spraying the desulfurizer in the cement kiln, which can not only achieve the purpose of saving the desulfurizer, but also effectively control SO2And (4) discharging.
FIG. 1 is an overall structural diagram of an embodiment of the present invention, and as shown in FIG. 1, the present invention provides an automatic control system for injection of desulfurizer in a cement kiln, which includes a storage tank 1, a rotary kiln system 2, an injection pump 3, a frequency converter 4, a flow meter 5, a PID regulation system 6, a central control room 7, and an SO2An online monitoring system 8, a DCS and a PID adjusting system 6, wherein the PID adjusting system 6 is arranged on the DCIn S, the storage tank body 1 is connected with the jet pump 3, the jet pump 3 is connected with the flowmeter 5, the flowmeter 5 is connected with the rotary kiln system 2, and the rotary kiln system 2 is connected with the SO2On-line monitoring system 8, SO2The on-line monitoring system 8 is connected with the central control room 7, the central control room 7 is connected with the DCS, the DCS is connected with the frequency converter 4, and the frequency converter 4 is connected with the jet pump 3.
The injection pump 3 comprises a main desulfurizer injection pump and a standby desulfurizer injection pump, and the standby desulfurizer injection pump can be immediately started when the main desulfurizer injection pump fails. The injection pump 3 comprises a main desulfurizer injection pump and a standby desulfurizer injection pump, and the frequency of the main desulfurizer injection pump and the frequency of the standby desulfurizer injection pump are both 50 Hz. The central control room 7 is connected with a PID adjusting system 6 in the DCS. SO (SO)2Online monitoring system 8 monitors SO2A change in value. And the PID regulating system 6 outputs a regulating instruction for the frequency converter 4. The central control room 7 is provided with a nominal value of SO2, SO2The comparison of the output value and the rated value provides a basis for the PID regulating system 6 to send out a regulating instruction; SO (SO)2Rated at 120mg/Nm3When SO2Actual value exceeds 120mg/Nm3The central control room 7 sends an instruction to the PID regulating system 6, the PID regulating system 6 outputs an instruction to the frequency converter 4 to increase the frequency of the frequency converter 4, and the frequency converter 4 regulates the jet pump 3; the storage tank body is a cuboid with the length of 4m, the width of 3m and the height of 2m or a cylinder with the radius of 1.1m and the height of 2 m.
The working principle of the invention is as follows: PID governing system 6 installs in DCS, and the accumulator tank body 1 is connected jet pump 3, and jet pump 3 is connected flowmeter 5, and flowmeter 5 is connected rotary kiln system 2, and rotary kiln system 2 is connected SO2On-line monitoring system 8, SO2The on-line monitoring system 8 is connected with the central control room 7, the central control room 7 is connected with the DCS, the DCS is connected with the frequency converter 4, the frequency converter 4 is connected with the injection pump 3, and the central control room 7 is provided with the SO2Rated value, SO2Online monitoring system 8 monitors SO2Change in value of SO2The comparison of the output value with the setpoint value provides the basis for the PID control system 6 to issue a control command, SO2Rated at 120mg/Nm3When SO2Actual value exceeds 120mg/Nm3The central control room 7 sends out an instruction to the PID regulating system 6, and the PID regulating system 6 outputs the instruction to the field frequency converter4, the frequency converter 4 controls the jet pump 3 to output a certain flow of desulfurizer, the frequency of the frequency converter 4 is increased to adjust the jet pump 3 to slowly increase the flow of the desulfurizer, the desulfurizer flows into the rotary kiln system 2 to be mixed with materials, and kiln tail flue gas generated by material reaction in the rotary kiln system 2 and SO in the system2Reaction, SO2Gradually decrease of SO2The output enters the central control room 7 again, and SO is output after reaction2After the actual value is compared with the rated value, the PID regulating system 6 sends out a new command again, and when the SO is generated2Actual value is 120mg/Nm or more3In the process, the PID regulating system 6 keeps the frequency increased by the frequency converter 4 unchanged, and the flow of the desulfurizer is slowly increased continuously; when SO2The actual value is gradually reduced to less than 120mg/Nm3When the process is carried out, the central control room 7 sends an instruction to the PID regulating system 6, the PID regulating system 6 outputs an instruction to the frequency converter 4 to reduce the frequency of the frequency converter 4, the frequency converter 4 regulates the injection pump 3 to slowly reduce the flow of the desulfurizer, the process is repeated in such a circulating way, the flow of the desulfurizer is changed in real time, and a large amount of injection is not carried out, SO that the SO can be effectively controlled2Discharging and achieving the purpose of saving the desulfurizer.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The above-described embodiments of the present application do not limit the scope of the present application.
Claims (9)
1. A cement kiln desulfurizer injection automatic control system comprises a storage tank body (1), a rotary kiln system (2), an injection pump (3), a frequency converter (4), a flow meter (5) and PID regulationSystem (6), central control room (7), SO2On-line monitoring system (8), DCS and PID governing system (6), characterized in that, PID governing system (6) install in the DCS, holding vessel body (1) is connected jet pump (3), jet pump (3) are connected flowmeter (5), flowmeter (5) are connected rotary kiln system (2), rotary kiln system (2) are connected SO2On-line monitoring system (8), the SO2On-line monitoring system (8) are connected central control room (7), central control room (7) are connected DCS, DCS connects converter (4), converter (4) are connected jet pump (3).
2. The automatic control system for injection of desulfurization agents for cement kilns according to claim 1, characterized in that said injection pump (3) comprises a main desulfurization agent injection pump (3) and a backup desulfurization agent injection pump (3), said backup desulfurization agent injection pump (3) being immediately activated when said main desulfurization agent injection pump (3) fails.
3. The automatic control system for injection of desulfurization agents for cement kilns according to claim 1, characterized in that said injection pump (3) comprises a main desulfurization agent injection pump (3) and a spare desulfurization agent injection pump (3), both the main desulfurization agent injection pump (3) and the spare desulfurization agent injection pump (3) having a frequency of 50 Hz.
4. The automatic control system for injection of desulfurization agents for cement kilns, according to claim 1, characterized in that said central control room (7) is connected to said PID regulation system (6) inside said DCS.
5. The automatic control system or system for injection of cement kiln desulfurizer as claimed in claim 1, wherein said SO is provided in the form of a gas2The online monitoring system (8) monitors SO2A change in value.
6. The automatic control system for injection of cement kiln desulfurization agent according to claim 1, wherein the PID adjustment system (6) outputs an adjustment command to the frequency converter (4).
7. Automatic control system for injection of desulfurization agent for cement kiln according to claim 1, characterized in that said central control room (7) is provided with SO2Rated value, SO2Output value and the SO2The comparison of the set values provides the basis for the PID control system (6) to issue a control command.
8. The automatic control system for injection of desulfurization agent for cement kiln according to claim 7, wherein said SO is provided in the form of a gas2Rated at 120mg/Nm3When said SO is2Actual value exceeds 120mg/Nm3The central control room (7) sends an instruction to the PID regulating system (6), the PID regulating system (6) outputs an instruction to the frequency converter (4) to increase the frequency of the frequency converter (4), and the frequency converter (4) regulates the injection pump (3).
9. The automatic control system for injection of desulfurizer in cement kilns according to claim 1, wherein the storage tank body (1) is a rectangular parallelepiped with a length of 4m, a width of 3m and a height of 2m or a cylinder with a radius of 1.1m and a height of 2 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911376977.2A CN111045322A (en) | 2019-12-27 | 2019-12-27 | Automatic control system for injection of cement kiln desulfurizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911376977.2A CN111045322A (en) | 2019-12-27 | 2019-12-27 | Automatic control system for injection of cement kiln desulfurizer |
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| CN111045322A true CN111045322A (en) | 2020-04-21 |
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| CN201911376977.2A Pending CN111045322A (en) | 2019-12-27 | 2019-12-27 | Automatic control system for injection of cement kiln desulfurizer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521998A (en) * | 2021-07-05 | 2021-10-22 | 国能龙源环保有限公司 | Sensitive and economical wet flue gas SO of desulfurization outletxConcentration control method |
| CN115974435A (en) * | 2023-01-10 | 2023-04-18 | 福建龙麟环境工程有限公司 | Dynamic sulfur suppression system and method for novel dry-process cement kiln under automatic control of DCS |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209596870U (en) * | 2019-03-08 | 2019-11-08 | 国电环境保护研究院有限公司 | A kind of desulphurization system of underload energy-saving safe |
-
2019
- 2019-12-27 CN CN201911376977.2A patent/CN111045322A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209596870U (en) * | 2019-03-08 | 2019-11-08 | 国电环境保护研究院有限公司 | A kind of desulphurization system of underload energy-saving safe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521998A (en) * | 2021-07-05 | 2021-10-22 | 国能龙源环保有限公司 | Sensitive and economical wet flue gas SO of desulfurization outletxConcentration control method |
| CN115974435A (en) * | 2023-01-10 | 2023-04-18 | 福建龙麟环境工程有限公司 | Dynamic sulfur suppression system and method for novel dry-process cement kiln under automatic control of DCS |
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