CN103120891A - Flue gas sulfur detection and desorption control system of energy-saving and environment-friendly laterite-nickel ore smelting vertical furnace - Google Patents
Flue gas sulfur detection and desorption control system of energy-saving and environment-friendly laterite-nickel ore smelting vertical furnace Download PDFInfo
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- CN103120891A CN103120891A CN2012104927737A CN201210492773A CN103120891A CN 103120891 A CN103120891 A CN 103120891A CN 2012104927737 A CN2012104927737 A CN 2012104927737A CN 201210492773 A CN201210492773 A CN 201210492773A CN 103120891 A CN103120891 A CN 103120891A
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Abstract
The invention discloses a flue gas sulfur detection and desorption control system of an energy-saving and environment-friendly laterite-nickel ore smelting vertical furnace, and belongs to the field of environmental protection. The flue gas sulfur detection and desorption control system of the energy-saving and environment-friendly laterite-nickel ore smelting vertical furnace comprises a sulfur content detection and desorption control system and desulfurization working procedures. The sulfur content detection and desorption control system consists of a detection system, a PLC (programmed logic controller), a secondary computer and an electric actuating mechanism; the detection system comprises a sulfur content detector and a PH meter; and the desulfurization working procedures adopt a spraying tower, a neutral solution tank, a calcium oxide stirring groove, an alkali-resisting pump, a filter and an alkaline liquid tank. According to the invention, the real-time detection of desulfurizing equipment and flue gas sulfur content and control of spraying solution amount are combined; the sulfur content in flue gas is detected and controlled effectively; the problems of standard exceeding of tail gas sulfur content and desulfurizer waste are solved; and the flue gas sulfur detection and desorption control system of the energy-saving and environment-friendly laterite-nickel ore smelting vertical furnace has the functions of 'self-learning and self-adaptation', and has a good desulfurizing effect.
Description
Technical field:
The invention belongs to field of Environment Protection, relate to a kind of energy saving and environment friendly smelting laterite-nickel ores shaft furnace flue gas sulfur-bearing detection and remove control system.
Background technology:
Nickel-iron smelting produces a large amount of flue gases, without administering directly discharging, will produce seriously environment and pollute, and the Detection ﹠ Controling of the sulfur content in the middle of flue gas are the most important things that smoke treatment is polluted.Usually the desulfurized treatment of ferronickel flue gas is all single dependence desulphurization plant, due to the effective detection and the control that lack the sulfur content in flue gas, be easy to occur the tail gas sulfur content problem that exceeds standard, and a large amount of use desulfurizing agents can cause the waste of desulfurizing agent, strengthen desulphurization cost.
Summary of the invention:
The present invention seeks to desulphurization plant is combined with the real-time detection of flue gas sulfur content and the control of spray solution amount, the sulfur content in flue gas is carried out effective the detection and control, solve the problem that the tail gas sulfur content exceeds standard problem and wastes desulfurizing agent.
Energy saving and environment friendly smelting laterite-nickel ores shaft furnace flue gas sulfur-bearing detects and removes control system, comprise S content detection and Desulfurization Control Systems and desulphurisation treater order, S content detection and Desulfurization Control Systems are comprised of detection system, PLC controller, second computer, electric operator, and detection system comprises S content detection instrument and PH meter; The desulphurisation treater order is by spray column, neutralization solution pond, quick lime tank diameter, and lye pump, filter, alkali lye pond forms.Detection system comprises S content detection instrument and PH meter; Detection system all is connected with the PLC controller with second computer, and the PLC controller is connected with electric operator, and electric operator is connected with lye pump, filter, quick lime tank diameter; The alkali lye in alkali lye pond is connected with solution pipeline in spray column by lye pump; In spray column with after solution be connected with the neutralization solution pond by pipeline; Filter and quick lime tank diameter all are connected with the neutralization solution pond.
The concrete technology step is:
The sulfur content detector of detection system is sent to the PLC controller with the flue gas inspection result, the PLC controller is transferred to computer with signal, calculate spray flux and spray liquid concentration by Computer, adjust spray flux by the mode that electric operator adopts control spray valve number and valve openings degree to combine, by alkali lye pond adjustment spray liquid concentration.
S content detection and Desulfurization Control Systems are divided into secondary, and the one-level automated system is completed the real-time detection of flue gas sulfur content and the control of spray solution amount.The mode that adopts control spray valve number and valve openings degree to combine is controlled spray flux.To control reaction speed and improve control accuracy in order to improve, adopt the control strategy that PID controls and fuzzy control combines.The secondary automation is calculated according to the concentration optimization of the spraying effect that feeds back to spray solution, thereby the solution ratio that adds is readjusted, and optimizes sulfur limitation effect, and secondary has " self study, self adaptation " function.
The desulphurisation treater order is the desulfurizing agent as leading take calcium hydroxide and NaOH mixed solution.When the flue gas that its main technique method nickel-iron smelting produces passes through spray column, through discharging after the alkali lye spray.Alkali lye pond pH value adds solid caustic soda less than 9, and alkali lye is squeezed into spray column through lye pump, and flue gas during smelting is sprayed neutralization, pH value greater than 5 neutralization after solution, directly enter the neutralization solution pond; PH value, by the calcium lime powder tank diameter then neutralizes less than 5 neutralization solution, and the solution after neutralization enters the neutralization solution pond.If neutralization solution pond precipitation is more, to squeeze into filter with lye pump and filter, filtered fluid enters the alkali lye pond, and filtrate solid waste is out concentrated to stack and is processed.Particular flow sheet such as Fig. 2.
The present invention combines desulphurization plant with the real-time detection of flue gas sulfur content and the control of spray solution amount, implementation effectively detects and controls to the sulfur content in flue gas, has solved the problem that the tail gas sulfur content exceeds standard problem and wastes desulfurizing agent.Advantage is that automaticity is high, and the secondary automated system has " self study, self adaptation " function, and desulfurized effect is good.
Description of drawings:
Fig. 1 is that the detection of flue gas sulfur-bearing removes the control system flow chart,
Fig. 2 is the desulphurisation treater program flow diagram,
Fig. 3 is system construction drawing of the present invention,
In Fig. 31, detection system, 2, the PLC controller, 3, second computer, 4, electric operator, 5, spray column, 6, the neutralization solution pond, 7, the calcium lime powder tank diameter, 8, lye pump, 9, filter, 10, the alkali lye pond.
The specific embodiment:
Energy saving and environment friendly smelting laterite-nickel ores shaft furnace flue gas sulfur-bearing detects and removes control system, comprise S content detection and Desulfurization Control Systems and desulphurisation treater order, S content detection and Desulfurization Control Systems are comprised of detection system 1, PLC controller 2, second computer 3, electric operator 4; The desulphurisation treater order is comprised of spray column 5, neutralization solution pond 6, calcium lime powder tank diameter 7, lye pump 8, filter 9, alkali lye pond 10.
The concrete technology step is:
The sulfur content detector of detection system is sent to the PLC controller with the flue gas inspection result, the PLC controller is transferred to computer with signal, calculate spray flux and spray liquid concentration by Computer, adjust spray flux by the mode that electric operator adopts control spray valve number and valve openings degree to combine, by alkali lye pond adjustment spray liquid concentration.
S content detection and Desulfurization Control Systems are divided into secondary, and the one-level automated system is completed the real-time detection of flue gas sulfur content and the control of spray solution amount.The mode that adopts control spray valve number and valve openings degree to combine is controlled spray flux.To control reaction speed and improve control accuracy in order to improve, adopt the control strategy that PID controls and fuzzy control combines.The secondary automation is calculated according to the concentration optimization of the spraying effect that feeds back to spray solution, thereby the solution ratio that adds is readjusted, and optimizes sulfur limitation effect, and secondary has " self study, self adaptation " function.
The desulphurisation treater order is the desulfurizing agent as leading take calcium hydroxide and NaOH mixed solution.When the flue gas that its main technique method nickel-iron smelting produces passes through spray column, through discharging after the alkali lye spray.Alkali lye pond pH value adds solid caustic soda less than 9, and alkali lye is squeezed into spray column through lye pump, and flue gas during smelting is sprayed neutralization, pH value greater than 5 neutralization after solution, directly enter the neutralization solution pond; PH value, by the calcium lime powder tank diameter then neutralizes less than 5 neutralization solution, and the solution after neutralization enters the neutralization solution pond.If neutralization solution pond precipitation is more, to squeeze into filter with lye pump and filter, filtered fluid enters the alkali lye pond, and filtrate solid waste is out concentrated to stack and is processed.Particular flow sheet such as Fig. 2.
Claims (3)
1. an energy saving and environment friendly smelting laterite-nickel ores shaft furnace flue gas sulfur-bearing detects and removes control system, it is characterized in that comprising S content detection and Desulfurization Control Systems and desulphurisation treater order, S content detection and desulphurization control equipment are comprised of detection system (1), PLC controller (2), second computer (3), electric operator (4); The desulfurization treatment facility is comprised of spray column (5), neutralization solution pond (6), quick lime tank diameter (7), lye pump (8), filter (9), alkali lye pond (10); Detection system comprises S content detection instrument and PH meter; Detection system (1) all is connected with PLC controller (2) with second computer (3), PLC controller (2) is connected with electric operator (4), and electric operator (4) is connected with lye pump (8), filter (9), quick lime tank diameter (7); The alkali lye in alkali lye pond (10) is connected by the interior solution pipeline of lye pump (8) and spray column (5); Solution after spray column (5) neutralization is connected with neutralization solution pond (6) by pipeline; Filter (9) all is connected with neutralization solution pond (6) with quick lime tank diameter (7);
The concrete technology step is:
The sulfur content detector of detection system is sent to the PLC controller with the flue gas inspection result, the PLC controller is transferred to computer with signal, calculate spray flux and spray liquid concentration by Computer, adjust spray flux by the mode that electric operator adopts control spray valve number and valve openings degree to combine, by alkali lye pond adjustment spray liquid concentration.
2. a kind of energy saving and environment friendly smelting laterite-nickel ores shaft furnace flue gas sulfur-bearing detects and removes control system according to claim 1, it is characterized in that S content detection and Desulfurization Control Systems are divided into secondary, the one-level automated system is completed the real-time detection of flue gas sulfur content and the control of spray solution amount, and the mode that adopts control spray valve number and valve openings degree to combine is controlled spray flux; To control reaction speed and improve control accuracy in order to improve, adopt the control strategy that PID controls and fuzzy control combines; The secondary automation is calculated according to the concentration optimization of the spraying effect that feeds back to spray solution, thereby the solution ratio that adds is readjusted, and optimizes sulfur limitation effect, and secondary has " self study, self adaptation " function.
3. a kind of energy saving and environment friendly smelting laterite-nickel ores shaft furnace flue gas sulfur-bearing detects and removes control system according to claim 1, it is characterized in that the desulphurisation treater order is take calcium hydroxide and NaOH mixed solution as desulfurizing agent; Its process is that the flue gas that produces of nickel-iron smelting is during by spray column, through discharging after the alkali lye spray; Alkali lye pond pH value adds solid caustic soda less than 9, and alkali lye is squeezed into spray column through lye pump, and flue gas during smelting is sprayed neutralization, pH value greater than 5 neutralization after solution, directly enter the neutralization solution pond; PH value, by the calcium lime powder tank diameter then neutralizes less than 5 neutralization solution, and the solution after neutralization enters the neutralization solution pond; If neutralization solution pond precipitation is more, to squeeze into filter with lye pump and filter, filtered fluid enters the alkali lye pond, and filtrate solid waste is out concentrated to stack and is processed.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103933844A (en) * | 2014-04-08 | 2014-07-23 | 中国科学院广州能源研究所 | Flue gas treatment system and control method by virtue of alkaline waste water |
| CN108873958A (en) * | 2018-06-19 | 2018-11-23 | 光大环保技术研究院（南京）有限公司 | A kind of fuzzy control method of circulating water PH value |
| CN110302642A (en) * | 2019-06-26 | 2019-10-08 | 青岛双瑞海洋环境工程股份有限公司 | The control method of marine exhaust desulphurization system |
| CN110449006A (en) * | 2019-09-03 | 2019-11-15 | 大唐东营发电有限公司 | A kind of power generation station-service boiler environment friendly purification apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1593726A (en) * | 2004-06-21 | 2005-03-16 | 樊金鑫 | Monitoring and automatic control system for wet method flue gas desulfurization technology |
| CN102225312A (en) * | 2011-05-18 | 2011-10-26 | 江苏正通宏泰股份有限公司 | Process for enhancing dual alkali desulfurization |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1593726A (en) * | 2004-06-21 | 2005-03-16 | 樊金鑫 | Monitoring and automatic control system for wet method flue gas desulfurization technology |
| CN102225312A (en) * | 2011-05-18 | 2011-10-26 | 江苏正通宏泰股份有限公司 | Process for enhancing dual alkali desulfurization |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103933844A (en) * | 2014-04-08 | 2014-07-23 | 中国科学院广州能源研究所 | Flue gas treatment system and control method by virtue of alkaline waste water |
| CN108873958A (en) * | 2018-06-19 | 2018-11-23 | 光大环保技术研究院（南京）有限公司 | A kind of fuzzy control method of circulating water PH value |
| CN110302642A (en) * | 2019-06-26 | 2019-10-08 | 青岛双瑞海洋环境工程股份有限公司 | The control method of marine exhaust desulphurization system |
| CN110449006A (en) * | 2019-09-03 | 2019-11-15 | 大唐东营发电有限公司 | A kind of power generation station-service boiler environment friendly purification apparatus |
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Effective date of registration: 20151202 Address after: 113122 Liaoning city in Fushun Province Economic Development Zone Economic Zone Lagucun Laguna Patentee after: Fushun Hanwang DRI Co.,Ltd. Address before: Shenhe Youth Street District of Shenyang City, Liaoning province 110016 No. 227 building Hanking Patentee before: Hanking Industrial Group Co., Ltd. |
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