CN117311277A - Refining control method for smelting waste acid vulcanization section - Google Patents
Refining control method for smelting waste acid vulcanization section Download PDFInfo
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- CN117311277A CN117311277A CN202311214200.2A CN202311214200A CN117311277A CN 117311277 A CN117311277 A CN 117311277A CN 202311214200 A CN202311214200 A CN 202311214200A CN 117311277 A CN117311277 A CN 117311277A
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- 239000002253 acid Substances 0.000 title claims abstract description 107
- 239000002699 waste material Substances 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000003723 Smelting Methods 0.000 title claims abstract description 26
- 238000007670 refining Methods 0.000 title claims abstract description 17
- 238000004073 vulcanization Methods 0.000 title claims description 45
- 239000007788 liquid Substances 0.000 claims abstract description 114
- 239000000463 material Substances 0.000 claims abstract description 73
- 238000012806 monitoring device Methods 0.000 claims abstract description 70
- 239000003814 drug Substances 0.000 claims abstract description 65
- 238000012544 monitoring process Methods 0.000 claims abstract description 42
- 238000012545 processing Methods 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims description 74
- 239000007789 gas Substances 0.000 claims description 67
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 40
- 229910052785 arsenic Inorganic materials 0.000 claims description 24
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 20
- 229910052802 copper Inorganic materials 0.000 claims description 20
- 239000010949 copper Substances 0.000 claims description 20
- 238000001802 infusion Methods 0.000 claims description 16
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 12
- 239000003546 flue gas Substances 0.000 claims description 12
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 11
- 239000012295 chemical reaction liquid Substances 0.000 claims description 10
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 claims description 10
- 230000001502 supplementing effect Effects 0.000 claims description 10
- 239000002912 waste gas Substances 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 7
- 238000004062 sedimentation Methods 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000010924 continuous production Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 238000007872 degassing Methods 0.000 description 5
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- KAEAMHPPLLJBKF-UHFFFAOYSA-N iron(3+) sulfide Chemical compound [S-2].[S-2].[S-2].[Fe+3].[Fe+3] KAEAMHPPLLJBKF-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 238000005486 sulfidation Methods 0.000 description 1
Classifications
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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
- 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
-
- 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
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/32—Operator till task planning
- G05B2219/32368—Quality control
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a refining control method of a smelting waste acid vulcanizing section, which is characterized in that a buffer tank is configured for a vulcanizing reaction device group, a first ORP data monitoring device is arranged in the buffer tank and used for collecting monitoring data of materials in the buffer tank in real time, then the waste acid materials are sent to the vulcanizing reaction tank for processing, meanwhile, an on-line tail gas monitoring device is arranged and used for collecting tail gas data, a second ORP data monitoring device is arranged and used for collecting monitoring data of feed liquid after the reaction processing in real time, a PID controller is utilized for analyzing and processing the data from the first ORP data monitoring device, the second ORP data monitoring device and the on-line tail gas monitoring device in a multi-impulse PID adjusting mode, and the flow of the waste acid materials and the liquid medicine is adjusted, so that the refining control of the smelting waste acid vulcanizing section is realized. The invention can adjust the dosage of the vulcanizing agent in the vulcanizing reaction according to the characteristics of the waste acid materials in time, thereby not only ensuring that the tail gas and tail gas emission indexes are qualified, but also effectively controlling the production cost.
Description
Technical Field
The invention belongs to the technical field of acid production by smelting flue gas, and particularly relates to a refining control method for a waste acid vulcanization section in smelting.
Background
Because nonferrous metal is mostly associated with sulfur to form sulphide ore, a large amount of sulfur dioxide is released in the metal smelting process, which is harmful to the environment, and the generated smelting flue gas is usually converted and absorbed to prepare a sulfuric acid product, so that the environment is protected, and the waste resources are fully utilized. The conventional smelting flue gas acid making system mainly comprises a purifying section, a dry absorbing section, a converting section, an acid warehouse section, a waste acid treatment section and the like, and because a large amount of mineral dust, arsenic, selenium and the like are mixed in the smelting flue gas, the pipeline is easy to block, and catalysts in the converting section are damaged, the flue gas is treated in the purifying section to remove various impurities, but a large amount of acid wastewater is generated in the purifying process, the acid wastewater is sent to the waste acid treatment section to be treated, and besides arsenic and fluorine, some nonferrous metals in the wastewater or the waste acid can be treated by adopting a vulcanizing method, and sulfur-containing salts such as sodium sulfide, sodium hydrosulfide, sodium thiosulfate, ferric sulfide and the like are added into the waste acid to react with metals such as arsenic, copper and the like to generate sulfide precipitates, so that the effects of removing arsenic and recycling metals are achieved. However, in the automatic continuous treatment process of the existing waste acid, the waste acid is not effectively regulated and controlled in the vulcanization reaction stage, on one hand, the waste acid directly enters a first-stage vulcanization reaction tank for reaction, ORP data monitoring is only carried out on the reaction liquid after the vulcanization reaction, and then the required reagent addition amount is regulated according to the data, and the waste acid is influenced by the real-time change of the content of heavy metal ions such as arsenic and the like in the waste acid, so that certain hysteresis exists in data monitoring and sampling observation, and the addition amount of the required reagent cannot be regulated and controlled in time, so that indexes of tail gas and tail liquid fluctuate; another aspect is the current sulfidation reactionBy means of a slight excess reaction, excess hydrogen sulphide gas or SO which is produced by poor degassing in the preceding stage is produced 2 The gas is absorbed by liquid alkali, if the regulation and control are not in time, excessive hydrogen sulfide gas is generated, the use of the liquid alkali is increased, and the condition of excessive consumption of the used medicament exists, so that the cost is increased.
Disclosure of Invention
Aiming at the defects, the invention discloses a refining control method for a smelting waste acid vulcanizing section, which can timely adjust the dosage of vulcanizing agents in the vulcanizing reaction according to the characteristics of waste acid materials, ensure that tail gas and tail gas emission indexes are qualified, and effectively control the production cost.
The invention is realized by adopting the following technical scheme:
a refining control method of a smelting waste acid vulcanization section comprises the following steps:
s1, configuring a buffer tank for a vulcanization reaction equipment group, wherein the top of the buffer tank is connected with an exhaust pipeline, a first ORP data monitoring device is arranged in the buffer tank and used for collecting monitoring data of materials in the buffer tank in real time, the monitoring data of the materials comprise acidity, arsenic content and copper content of the materials, a liquid outlet of the buffer tank is connected with an infusion pump, and an outlet of the infusion pump is provided with a first automatic regulating valve and is connected with an infusion main pipe; the vulcanization reaction equipment set comprises a liquid medicine storage tank, a tail gas collecting tank, a vulcanization reaction tank and a sedimentation tank, wherein the top of the vulcanization reaction tank is provided with a feed pipe, an exhaust pipe and a dosing pipe, the feed pipe is connected with the main infusion pipe, the dosing pipe is connected with the main liquid medicine pipe, the dosing pipe is provided with a second automatic regulating valve, the liquid medicine storage tank is connected with the main liquid medicine pipe through a pump, the exhaust pipe is connected with the tail gas collecting tank, and the exhaust pipe is provided with tail gas on-line monitoring equipment which is used for collecting tail gas data, and the tail gas data comprises hydrogen sulfide content and sulfur dioxide content; a liquid discharge pipe is arranged on the side surface of the upper part of the vulcanization reaction tank, the liquid discharge pipe is connected with the sedimentation tank, and a third automatic regulating valve is arranged on the liquid discharge pipe; the liquid discharge pipe is provided with a second ORP data monitoring device which is used for collecting monitoring data of the liquid in the liquid discharge pipe in real time, wherein the monitoring data of the liquid comprise acidity, arsenic content and copper content of the liquid; the outlet sides of the first automatic regulating valve and the second automatic regulating valve are respectively provided with a flowmeter; the first ORP data monitoring device, the second ORP data monitoring device, the first automatic regulating valve, the second automatic regulating valve, the third automatic regulating valve, the tail gas on-line monitoring device and the flowmeter are respectively connected with the PID controller;
s2, continuously conveying the waste acid materials subjected to degassing treatment into the buffer tank in a continuous production mode, connecting a fan with an exhaust pipeline of the buffer tank and discharging waste gas generated in the buffer tank, then firstly processing data from a first ORP data monitoring device by a PID controller, controlling a first automatic regulating valve and a second automatic regulating valve to add the waste acid materials and liquid medicine into a vulcanization reaction tank for reaction according to initial setting, then controlling a third automatic regulating valve to discharge reacted reaction liquid into a settling tank, then processing data from the first ORP data monitoring device, the second ORP data monitoring device, an exhaust on-line monitoring device and a flowmeter by the PID controller in a multi-impulse PID regulation mode, and regulating flow of the waste acid materials and the liquid medicine by controlling the first automatic regulating valve and the second automatic regulating valve, thereby realizing fine control of a smelting waste acid vulcanization section.
The method is characterized in that a large amount of waste acid materials (namely acid waste water) are generated in the process of preparing acid from flue gas, the waste acid materials (namely acid waste water) contain a certain amount of arsenic, copper and other heavy metals, the waste acid materials can be discharged after the harmful substances are required to be removed by adding liquid medicine (sodium hydrosulfide solution) for treatment, meanwhile, the waste acid materials are continuously generated in the process of preparing acid from flue gas, the waste acid materials are continuously treated, in order to reduce labor intensity, post operation is reduced, the treatment process of the waste acid materials adopts automatic operation, a control system automatically controls the dosage proportion of the waste acid materials and the treatment liquid medicine according to the data information of the harmful substances in the treated reaction liquid, but the data monitoring and sampling observation of the conventional method have certain hysteresis, the adding amount of the required chemical agents cannot be timely regulated and controlled, so that the indexes of tail gas and tail liquid are fluctuated, the invention is provided with a buffer tank before a vulcanization reaction equipment group of the waste acid materials, and the content information of arsenic, copper and other heavy metals in the waste acid materials is continuously mastered in advance on the buffer tank by arranging a first ORP data monitoring equipment, on-line monitoring equipment and a flowmeter for monitoring the content information of the waste acid materials, and a plurality of the flow rate of the waste acid materials are timely adjusted by adopting a mode of real-time proportion of the waste acid and PID (proportion of the waste acid and PID) to realize real-time control.
On the other hand, although the waste acid material is subjected to degassing treatment before the vulcanization reaction, a small amount of gas such as sulfur dioxide still remains in the waste acid material, the residual sulfur dioxide also reacts with the liquid medicine, the liquid medicine treatment effect is reduced, and the difficulty of automatic regulation is also increased, so that the buffer tank is in a negative pressure state by using the fan, the release and discharge of the gas such as sulfur dioxide in the waste acid material are promoted, and the influence of the gas such as sulfur dioxide is reduced.
Further, the side of the buffer tank is provided with a gas supplementing pipeline, and air or nitrogen is introduced into the waste acid material by using the gas supplementing pipeline. The air is introduced into the waste acid material through the air supplementing pipeline, so that residual sulfur dioxide and other gases in the waste acid material can be promoted to be separated out, and the gases are discharged along the exhaust pipeline, so that the reaction of the sulfur dioxide and the subsequent use of the medicine liquid is avoided, and the use cost of the medicine is increased.
Further, the pressure in the buffer tank is 800-1200 Pa. The buffer tank is controlled to be in a negative pressure state, so that the discharge of gases such as sulfur dioxide in waste acid materials is facilitated.
Further, the exhaust pipeline is connected with an acid-proof fan to send the collected waste gas to a dry suction section of a flue gas acid making system for treatment. Thus, the residual sulfur dioxide in the waste acid materials can be recycled.
Further, the liquid medicine is a sodium hydrosulfide aqueous solution with the concentration of 30-35%.
Further, the flow rate of the waste acid material is 50m 3 And/h, the flow rate of the liquid medicine is 2-3 m 3 And/h, the initial setting of the liquid medicine flow is 2.8m 3 And/h. The flow ratio of the waste acid material to the liquid medicine is controlled to enable heavy metals such as arsenic and copper in the waste acid material to fully react with the liquid medicine, so that the aim of effectively removing the heavy metals such as arsenic and copper is achieved.
Further, in the monitoring data of the feed liquid, the arsenic content is controlled below 0.3mg/L, and the copper content is controlled below 0.3 mg/L; in the tail gas data, the content of hydrogen sulfide is controlled to be 0.03mg/m 3 Sulfur dioxide content is controlled at 200mg/m 3 The following is given.
Compared with the prior art, the technical scheme has the following beneficial effects:
according to the invention, during normal production of the waste acid vulcanizing section, the characteristics of waste acid materials are mastered in advance by arranging the buffer tank with ORP data monitoring equipment, and the adding condition of the liquid medicine for vulcanizing during reaction is adjusted in time, so that the use cost of the liquid medicine is reduced; the multi-impulse PID regulation mode of ORP data monitoring data is adopted, the adding condition of liquid medicine is controlled in advance according to the reaction state of materials, the accurate regulation is facilitated for the automatic operation of the process, the generation of gases such as hydrogen sulfide is reduced, and the indexes of tail gas and tail emission are reduced; the buffer tank is in a negative pressure state, so that the degassing of waste acid materials is promoted, the residues of sulfur dioxide and other gases in the waste acid materials are reduced, the use cost of the medicament is reduced, and the reaction efficiency of the vulcanization section is improved.
Drawings
FIG. 1 is a schematic diagram showing the connection of a buffer tank and a vulcanization reaction equipment set according to the present invention.
Reference numerals: the device comprises a 1-buffer tank, a 2-exhaust pipeline, a 3-air supplementing pipeline, a 4-first ORP data monitoring device, a 5-flowmeter, a 6-liquid medicine storage tank, a 7-tail gas on-line monitoring device, an 8-tail gas collecting tank, a 9-second ORP data monitoring device and a 10-vulcanization reaction tank.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to be limiting. The specific experimental conditions and methods not specified in the following examples are generally conventional means well known to those skilled in the art.
Example 1: a refining control method of a smelting waste acid vulcanization section comprises the following steps:
s1, configuring a buffer tank 1 for a vulcanization reaction equipment group, wherein the top of the buffer tank 1 is connected with an exhaust pipeline 2, a first ORP data monitoring device 4 is arranged in the buffer tank 1, the first ORP data monitoring device 4 is used for collecting monitoring data of materials in the buffer tank 1 in real time, the monitoring data of the materials comprise acidity, arsenic content and copper content of the materials, a liquid outlet of the buffer tank 1 is connected with an infusion pump, and an outlet of the infusion pump is provided with a first automatic regulating valve and is connected with an infusion main pipe; the vulcanizing reaction equipment set comprises a liquid medicine storage tank 6, a tail gas collecting tank 8, a vulcanizing reaction tank 10 and a settling tank, wherein a feed pipe, an exhaust pipe and a dosing pipe are arranged at the top of the vulcanizing reaction tank 10, the feed pipe is connected with a main transfusion pipe, the dosing pipe is connected with the main liquid medicine pipe, a second automatic regulating valve is arranged on the dosing pipe, the liquid medicine storage tank 6 is connected with the main liquid medicine pipe through a pump, the exhaust pipe is connected with the tail gas collecting tank 8, an tail gas on-line monitoring device 7 is arranged on the exhaust pipe, the tail gas on-line monitoring device 7 is used for collecting tail gas data, and the tail gas data comprises hydrogen sulfide content and sulfur dioxide content; a liquid discharge pipe is arranged on the side surface of the upper part of the vulcanization reaction tank 10, the liquid discharge pipe is connected with the sedimentation tank, and a third automatic regulating valve is arranged on the liquid discharge pipe; the liquid discharge pipe is provided with a second ORP data monitoring device 9, the second ORP data monitoring device 9 is used for collecting monitoring data of the liquid in the liquid discharge pipe in real time, and the monitoring data of the liquid comprise acidity, arsenic content and copper content of the liquid; the outlet sides of the first automatic regulating valve and the second automatic regulating valve are respectively provided with a flowmeter 5; the first ORP data monitoring device 4, the second ORP data monitoring device 9, the first automatic regulating valve, the second automatic regulating valve, the third automatic regulating valve, the tail gas on-line monitoring device 7 and the flowmeter 5 are respectively connected with a PID controller;
S2、adopt continuous production mode, continuously send the waste acid material that is processed through the degasification to buffer tank 1 in, be connected with the exhaust pipe 2 of buffer tank 1 with the fan and discharge the waste gas that produces in the buffer tank 1, the side of buffer tank 1 is equipped with air make-up pipeline 3, utilizes air make-up pipeline 3 to let in nitrogen gas to waste acid material, the flow (m 3 /h) flow (m) of spent acid material 3 The ratio of/h) is 10:1, the pressure in the buffer tank 1 is 1000Pa, then a PID controller firstly processes data from the first ORP data monitoring device 4, a first automatic regulating valve and a second automatic regulating valve are controlled to be added into the vulcanization reaction tank 10 for reaction according to initial setting, then a third automatic regulating valve is controlled to discharge reacted reaction liquid into a settling tank, then the PID controller processes data from the first ORP data monitoring device 4, the second ORP data monitoring device 9, the tail gas on-line monitoring device 7 and the flowmeter 5 in a multi-impulse PID regulation mode, and the flow of the waste acid material and the liquid medicine is regulated by controlling the first automatic regulating valve and the second automatic regulating valve, so that the refined control of the smelting waste acid vulcanization section is realized; the exhaust pipeline 2 is connected with an acid-resistant fan, and the collected waste gas is sent to a dry suction section of a flue gas acid making system for treatment; the liquid medicine is sodium hydrosulfide aqueous solution with the concentration of 33%; the flow rate of the waste acid material is 50m 3 And/h, the flow rate of the liquid medicine is 2-3 m 3 And/h, the initial setting of the liquid medicine flow is 2.8m 3 /h; in the monitoring data of the feed liquid, the arsenic content is controlled below 0.3mg/L, and the copper content is controlled below 0.3 mg/L; in the tail gas data, the content of hydrogen sulfide is controlled to be 0.03mg/m 3 Sulfur dioxide content is controlled at 200mg/m 3 The following is given.
The conventional method is used as a contrast, namely, a sodium hydrosulfide solution is added to treat waste acid materials, ORP data monitoring is only used for monitoring reaction liquid after vulcanization reaction, and then the required adding amount of the medicament is adjusted according to the data; the treatment according to the method reduces the dosage of the liquid medicine by 5.2 percent.
Example 2: a refining control method of a smelting waste acid vulcanization section comprises the following steps:
s1, configuring a buffer tank 1 for a vulcanization reaction equipment group, wherein the top of the buffer tank 1 is connected with an exhaust pipeline 2, a first ORP data monitoring device 4 is arranged in the buffer tank 1, the first ORP data monitoring device 4 is used for collecting monitoring data of materials in the buffer tank 1 in real time, the monitoring data of the materials comprise acidity, arsenic content and copper content of the materials, a liquid outlet of the buffer tank 1 is connected with an infusion pump, and an outlet of the infusion pump is provided with a first automatic regulating valve and is connected with an infusion main pipe; the vulcanizing reaction equipment set comprises a liquid medicine storage tank 6, a tail gas collecting tank 8, a vulcanizing reaction tank 10 and a settling tank, wherein a feed pipe, an exhaust pipe and a dosing pipe are arranged at the top of the vulcanizing reaction tank 10, the feed pipe is connected with a main transfusion pipe, the dosing pipe is connected with the main liquid medicine pipe, a second automatic regulating valve is arranged on the dosing pipe, the liquid medicine storage tank 6 is connected with the main liquid medicine pipe through a pump, the exhaust pipe is connected with the tail gas collecting tank 8, an tail gas on-line monitoring device 7 is arranged on the exhaust pipe, the tail gas on-line monitoring device 7 is used for collecting tail gas data, and the tail gas data comprises hydrogen sulfide content and sulfur dioxide content; a liquid discharge pipe is arranged on the side surface of the upper part of the vulcanization reaction tank 10, the liquid discharge pipe is connected with the sedimentation tank, and a third automatic regulating valve is arranged on the liquid discharge pipe; the liquid discharge pipe is provided with a second ORP data monitoring device 9, the second ORP data monitoring device 9 is used for collecting monitoring data of the liquid in the liquid discharge pipe in real time, and the monitoring data of the liquid comprise acidity, arsenic content and copper content of the liquid; the outlet sides of the first automatic regulating valve and the second automatic regulating valve are respectively provided with a flowmeter 5; the first ORP data monitoring device 4, the second ORP data monitoring device 9, the first automatic regulating valve, the second automatic regulating valve, the third automatic regulating valve, the tail gas on-line monitoring device 7 and the flowmeter 5 are respectively connected with a PID controller;
s2, continuously conveying the degassed waste acid materials into the buffer tank 1 in a continuous production mode, connecting a fan with an exhaust pipeline 2 of the buffer tank 1 and discharging waste gas generated in the buffer tank 1, wherein a gas supplementing pipeline 3 is arranged on the side surface of the buffer tank 1, and supplementing gas is utilizedThe air is introduced into the waste acid material through a pipeline 3, and the flow (m 3 /h) flow (m) of spent acid material 3 The ratio of/h) is 15:1, the pressure in the buffer tank 1 is 800Pa, then a PID controller firstly processes data from the first ORP data monitoring device 4, the first automatic regulating valve and the second automatic regulating valve are controlled to be added into the vulcanization reaction tank 10 according to initial setting to react with waste acid materials and liquid medicine, then the third automatic regulating valve is controlled to discharge reacted reaction liquid into the settling tank, then the PID controller processes data from the first ORP data monitoring device 4, the second ORP data monitoring device 9, the tail gas online monitoring device 7 and the flowmeter 5 in a multi-impulse PID regulation mode, and the flow of the waste acid materials and the liquid medicine is regulated by controlling the first automatic regulating valve and the second automatic regulating valve, so that the refined control of the smelting waste acid vulcanization section is realized; the exhaust pipeline 2 is connected with an acid-resistant fan, and the collected waste gas is sent to a dry suction section of a flue gas acid making system for treatment; the liquid medicine is a sodium hydrosulfide aqueous solution with the concentration of 30 percent; the flow rate of the waste acid material is 50m 3 And/h, the flow rate of the liquid medicine is 2-3 m 3 And/h, the initial setting of the liquid medicine flow is 2.8m 3 /h; in the monitoring data of the feed liquid, the arsenic content is controlled below 0.3mg/L, and the copper content is controlled below 0.3 mg/L; in the tail gas data, the content of hydrogen sulfide is controlled to be 0.03mg/m 3 Sulfur dioxide content is controlled at 200mg/m 3 The following is given.
The conventional method is used as a contrast, namely, a sodium hydrosulfide solution is added to treat waste acid materials, ORP data monitoring is only used for monitoring reaction liquid after vulcanization reaction, and then the required adding amount of the medicament is adjusted according to the data; the treatment according to the method reduces the dosage of the liquid medicine by 4.8 percent.
Example 3: a refining control method of a smelting waste acid vulcanization section comprises the following steps:
s1, configuring a buffer tank 1 for a vulcanization reaction equipment group, wherein the top of the buffer tank 1 is connected with an exhaust pipeline 2, a first ORP data monitoring device 4 is arranged in the buffer tank 1, the first ORP data monitoring device 4 is used for collecting monitoring data of materials in the buffer tank 1 in real time, the monitoring data of the materials comprise acidity, arsenic content and copper content of the materials, a liquid outlet of the buffer tank 1 is connected with an infusion pump, and an outlet of the infusion pump is provided with a first automatic regulating valve and is connected with an infusion main pipe; the vulcanizing reaction equipment set comprises a liquid medicine storage tank 6, a tail gas collecting tank 8, a vulcanizing reaction tank 10 and a settling tank, wherein a feed pipe, an exhaust pipe and a dosing pipe are arranged at the top of the vulcanizing reaction tank 10, the feed pipe is connected with a main transfusion pipe, the dosing pipe is connected with the main liquid medicine pipe, a second automatic regulating valve is arranged on the dosing pipe, the liquid medicine storage tank 6 is connected with the main liquid medicine pipe through a pump, the exhaust pipe is connected with the tail gas collecting tank 8, an tail gas on-line monitoring device 7 is arranged on the exhaust pipe, the tail gas on-line monitoring device 7 is used for collecting tail gas data, and the tail gas data comprises hydrogen sulfide content and sulfur dioxide content; a liquid discharge pipe is arranged on the side surface of the upper part of the vulcanization reaction tank 10, the liquid discharge pipe is connected with the sedimentation tank, and a third automatic regulating valve is arranged on the liquid discharge pipe; the liquid discharge pipe is provided with a second ORP data monitoring device 9, the second ORP data monitoring device 9 is used for collecting monitoring data of the liquid in the liquid discharge pipe in real time, and the monitoring data of the liquid comprise acidity, arsenic content and copper content of the liquid; the outlet sides of the first automatic regulating valve and the second automatic regulating valve are respectively provided with a flowmeter 5; the first ORP data monitoring device 4, the second ORP data monitoring device 9, the first automatic regulating valve, the second automatic regulating valve, the third automatic regulating valve, the tail gas on-line monitoring device 7 and the flowmeter 5 are respectively connected with a PID controller;
s2, continuously delivering the degassed waste acid material into the buffer tank 1 in a continuous production mode, connecting a fan with an exhaust pipeline 2 of the buffer tank 1 and discharging waste gas generated in the buffer tank 1, wherein a gas supplementing pipeline 3 is arranged on the side surface of the buffer tank 1, nitrogen is introduced into the waste acid material by utilizing the gas supplementing pipeline 3, and the flow (m 3 /h) flow (m) of spent acid material 3 The ratio of/h) is 12:1, the pressure in the buffer tank 1 is 1200Pa, then the PID controller first counts from the first ORP data monitoring device 4According to the treatment, a first automatic regulating valve and a second automatic regulating valve are controlled according to initial setting, waste acid materials and liquid medicine are added into a vulcanization reaction tank 10 for reaction, then a third automatic regulating valve is controlled to discharge reacted reaction liquid into a settling tank, then a PID controller adopts a multi-impulse PID (proportion integration differentiation) regulation mode to treat data from a first ORP data monitoring device 4, a second ORP data monitoring device 9, a tail gas online monitoring device 7 and a flowmeter 5, and the flow rates of the waste acid materials and the liquid medicine are regulated by controlling the first automatic regulating valve and the second automatic regulating valve, so that the fine control of a smelting waste acid vulcanization section is realized; the exhaust pipeline 2 is connected with an acid-resistant fan, and the collected waste gas is sent to a dry suction section of a flue gas acid making system for treatment; the liquid medicine is sodium hydrosulfide aqueous solution with the concentration of 30-35%; the flow rate of the waste acid material is 50m 3 And/h, the flow rate of the liquid medicine is 2-3 m 3 And/h, the initial setting of the liquid medicine flow is 2.8m 3 /h; in the monitoring data of the feed liquid, the arsenic content is controlled below 0.3mg/L, and the copper content is controlled below 0.3 mg/L; in the tail gas data, the content of hydrogen sulfide is controlled to be 0.03mg/m 3 Sulfur dioxide content is controlled at 200mg/m 3 The following is given.
The conventional method is used as a contrast, namely, a sodium hydrosulfide solution is added to treat waste acid materials, ORP data monitoring is only used for monitoring reaction liquid after vulcanization reaction, and then the required adding amount of the medicament is adjusted according to the data; the treatment according to the method reduces the dosage of the liquid medicine by 4.9 percent.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. A refining control method for a smelting waste acid vulcanization section is characterized by comprising the following steps of: the method comprises the following steps:
s1, configuring a buffer tank (1) for a vulcanization reaction equipment group, wherein the top of the buffer tank (1) is connected with an exhaust pipeline (2), a first ORP data monitoring device (4) is arranged in the buffer tank (1), the first ORP data monitoring device (4) is used for collecting monitoring data of materials in the buffer tank (1) in real time, the monitoring data of the materials comprise acidity, arsenic content and copper content of the materials, a liquid outlet of the buffer tank (1) is connected with an infusion pump, and an outlet of the infusion pump is provided with a first automatic regulating valve and is connected with an infusion main pipe; the vulcanization reaction equipment set comprises a liquid medicine storage tank (6), a tail gas collecting tank (8), a vulcanization reaction tank (10) and a sedimentation tank, wherein a feed pipe, an exhaust pipe and a dosing pipe are arranged at the top of the vulcanization reaction tank (10), the feed pipe is connected with a main transfusion pipe, the dosing pipe is connected with the main liquid medicine pipe, a second automatic regulating valve is arranged on the dosing pipe, the liquid medicine storage tank (6) is connected with the main liquid medicine pipe through a pump, the exhaust pipe is connected with the tail gas collecting tank (8), an tail gas on-line monitoring device (7) is arranged on the exhaust pipe, and the tail gas on-line monitoring device (7) is used for collecting tail gas data comprising hydrogen sulfide content and sulfur dioxide content; a liquid discharge pipe is arranged on the side surface of the upper part of the vulcanization reaction tank (10), the liquid discharge pipe is connected with the sedimentation tank, and a third automatic regulating valve is arranged on the liquid discharge pipe; the liquid discharge pipe is provided with a second ORP data monitoring device (9), the second ORP data monitoring device (9) is used for collecting monitoring data of liquid in the liquid discharge pipe in real time, and the monitoring data of the liquid comprise acidity, arsenic content and copper content of the liquid; the outlet sides of the first automatic regulating valve and the second automatic regulating valve are respectively provided with a flowmeter (5); the first ORP data monitoring device (4), the second ORP data monitoring device (9), the first automatic regulating valve, the second automatic regulating valve, the third automatic regulating valve, the tail gas on-line monitoring device (7) and the flowmeter (5) are respectively connected with a PID controller;
s2, continuously conveying the degassed waste acid materials into the buffer tank (1) in a continuous production mode, connecting a fan with an exhaust pipeline (2) of the buffer tank (1) and discharging waste gas generated in the buffer tank (1), then firstly processing data from a first ORP data monitoring device (4) by a PID controller, adding the waste acid materials and liquid medicine into a vulcanization reaction tank (10) for reaction according to an initial setting control of a first automatic regulating valve and a second automatic regulating valve, then controlling a third automatic regulating valve to discharge the reacted reaction liquid into a settling tank, and then processing data from the first ORP data monitoring device (4), the second ORP data monitoring device (9), an exhaust on-line monitoring device (7) and a flowmeter (5) by the PID controller in a multi-impulse PID regulation mode, and regulating flow of the waste acid materials and the liquid medicine by controlling the first automatic regulating valve and the second automatic regulating valve, thereby realizing fine control of a waste acid vulcanization section.
2. The refining control method of the smelting waste acid vulcanizing section according to claim 1, which is characterized in that: and the side surface of the buffer tank (1) is provided with a gas supplementing pipeline (3), and air or nitrogen is introduced into the waste acid material by using the gas supplementing pipeline (3).
3. The refining control method of the smelting waste acid vulcanizing section according to claim 1, which is characterized in that: the pressure in the buffer tank (1) is 800-1200 Pa.
4. The refining control method of the smelting waste acid vulcanizing section according to claim 1, which is characterized in that: the exhaust pipeline (2) is connected with an acid-resistant fan, and the collected waste gas is sent to a dry suction working section of the flue gas acid making system for treatment.
5. The refining control method of the smelting waste acid vulcanizing section according to claim 1, which is characterized in that: the liquid medicine is 30-35% sodium hydrosulfide aqueous solution.
6. The refining control method of the smelting waste acid vulcanizing section according to claim 1, which is characterized in that: flow rate of the waste acid material50m of 3 And/h, the flow rate of the liquid medicine is 2-3 m 3 And/h, the initial setting of the liquid medicine flow is 2.8m 3 /h。
7. The refining control method of the smelting waste acid vulcanizing section according to claim 1, which is characterized in that: in the monitoring data of the feed liquid, the arsenic content is controlled below 0.3mg/L, and the copper content is controlled below 0.3 mg/L; in the tail gas data, the content of hydrogen sulfide is controlled to be 0.03mg/m 3 Sulfur dioxide content is controlled at 200mg/m 3 The following is given.
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