CN110975567A - Acid mist waste gas recovery processing system for industrial surface treatment - Google Patents
Acid mist waste gas recovery processing system for industrial surface treatment Download PDFInfo
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- CN110975567A CN110975567A CN201911180651.2A CN201911180651A CN110975567A CN 110975567 A CN110975567 A CN 110975567A CN 201911180651 A CN201911180651 A CN 201911180651A CN 110975567 A CN110975567 A CN 110975567A
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- 239000002912 waste gas Substances 0.000 title claims abstract description 117
- 239000003595 mist Substances 0.000 title claims abstract description 63
- 239000002253 acid Substances 0.000 title claims abstract description 57
- 238000011084 recovery Methods 0.000 title claims abstract description 32
- 238000004381 surface treatment Methods 0.000 title claims abstract description 19
- 238000000746 purification Methods 0.000 claims abstract description 37
- 230000004224 protection Effects 0.000 claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 239000003814 drug Substances 0.000 claims description 55
- 239000007788 liquid Substances 0.000 claims description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000007921 spray Substances 0.000 claims description 23
- 239000003513 alkali Substances 0.000 claims description 20
- 238000005507 spraying Methods 0.000 claims description 18
- 238000007865 diluting Methods 0.000 claims description 17
- 238000009833 condensation Methods 0.000 claims description 15
- 230000005494 condensation Effects 0.000 claims description 15
- 239000000523 sample Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000000741 silica gel Substances 0.000 claims description 7
- 229910002027 silica gel Inorganic materials 0.000 claims description 7
- 238000010790 dilution Methods 0.000 claims description 6
- 239000012895 dilution Substances 0.000 claims description 6
- 230000002265 prevention Effects 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 3
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- 238000009713 electroplating Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 208000025274 Lightning injury Diseases 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012377 drug delivery Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
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- 238000005272 metallurgy Methods 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
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- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
- A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
-
- 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
- B01D53/346—Controlling the process
-
- 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
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- 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
- B01D53/73—After-treatment of removed components
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
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- Treating Waste Gases (AREA)
Abstract
The invention discloses an acid mist waste gas recovery treatment system for industrial surface treatment, which belongs to the field of environmental protection equipment and comprises a waste gas inlet pipe, a fan and a purification tower; the waste gas inlet pipe is provided with a fireproof device, the fireproof device comprises a PLC (programmable logic controller), a mechanical arm, a movable pipe, a fire-fighting automatic fireproof valve, a pre-valve temperature detection element and a post-valve temperature detection element, the fire-fighting automatic fireproof valve is arranged on the waste gas inlet pipe, the pre-valve temperature detection element is used for detecting the pre-valve temperature of the fire-fighting automatic fireproof valve, and the post-valve temperature detection element is used for detecting the post-valve temperature of the fire-fighting automatic fireproof valve; the PLC controller is used for controlling the automatic fire prevention valve of fire control to open and close, the fan opens and stops and the arm opens and stops, and the arm is used for snatching the movable tube, and waste gas advances to manage and has seted up the breakpoint, and the movable tube is installed and is advanced a breakpoint department at waste gas, has solved current waste gas recovery processing system and has not set up firebreak device in waste gas inlet pipeline department, causes the problem of potential safety hazard easily.
Description
Technical Field
The invention relates to the field of environment-friendly equipment, in particular to an acid mist waste gas recovery and treatment system for industrial surface treatment.
Background
The acid mist waste gas is mainly generated in the acid using process of the industries such as chemical industry, electronics, metallurgy, electroplating, textile (chemical fiber), mechanical manufacturing and the like, such as acid making, acid washing, electroplating, electrolysis, acid storage battery charging and the like, and substances between the generated smoke gas and the water mist have strong corrosivity.
The conventional acid mist waste gas treatment is to collect the acid mist waste gas in the manufacturing process in a closed workshop and treat the collected acid mist waste gas by a treatment system to achieve environment-friendly emission. In the field of industrial surface treatment, such as in the electroplating industry, the waste gas inlet may have an excessively high temperature, however, the conventional waste gas recovery processing system does not have a fire protection device at the waste gas inlet pipeline, once the waste gas with the excessively high temperature enters the waste gas recovery processing system, equipment such as a fan and the like is easily damaged, and a fire disaster is easily caused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an acid mist waste gas recovery and treatment system for industrial surface treatment, which solves the problem that the existing waste gas recovery and treatment system is easy to cause potential safety hazards because a fire protection device is not arranged at a waste gas inlet pipeline.
In order to achieve the purpose, the invention provides the following technical scheme:
an acid mist waste gas recovery treatment system for industrial surface treatment comprises a waste gas inlet pipe, a fan and a purification tower;
the waste gas inlet pipe is used for introducing waste gas, the purification tower is used for purifying the waste gas, and the fan is used for sucking the waste gas so as to enable the waste gas to flow in the waste gas inlet pipe and the purification tower;
the waste gas inlet pipe is provided with a fireproof device, the fireproof device comprises a PLC (programmable logic controller), a mechanical arm, a movable pipe, an automatic fire protection valve, a pre-valve temperature detection element and a post-valve temperature detection element, the automatic fire protection valve is installed on the waste gas inlet pipe, the pre-valve temperature detection element is used for detecting the pre-valve temperature of the automatic fire protection valve and transmitting a detection signal to the PLC, and the post-valve temperature detection element is used for detecting the post-valve temperature of the automatic fire protection valve and transmitting a detection signal to the PLC;
the PLC controller is used for controlling the automatic fire-fighting fire prevention valve is opened and closed, the fan is opened and closed and the arm is opened and closed, the arm is used for snatching the movable tube, so that the movable tube breaks away from waste gas advances the pipe, waste gas advances to have seted up the breakpoint on the pipe, the movable tube is installed waste gas advances a pipe breakpoint department and both ends respectively with waste gas advances the pipe contact, so that the movable tube with waste gas advances the pipe intercommunication.
Through the technical scheme, temperature detecting element can detect the temperature before the automatic fire prevention valve of fire control before the valve, and give the PLC controller with signal transmission, so that through opening and close of the automatic fire prevention valve of PLC controller control fire control, temperature before the automatic fire prevention valve of fire control surpasses the setting value (according to the operating mode settlement, generally for about 70 ℃), the PLC controller will control the automatic fire prevention valve of fire control and close, thereby block that waste gas passes through, the PLC controller will control the fan stop work simultaneously, be convenient for protect whole acid mist waste gas recovery processing system, prevent the potential safety hazard, like the conflagration, equipment damage etc.. When the temperature in front of the fire-fighting automatic fire-fighting valve is lower than a set value, the PLC controls the fire-fighting automatic fire-fighting valve to open, waste gas convenient to pass through, the PLC controls the fan to start working, and the acid mist waste gas recovery and treatment system starts to operate again.
The temperature detecting element behind the valve can detect the temperature behind the fire-fighting automatic fire valve and send a signal to the PLC controller so as to control the mechanical arm to start and stop through the PLC controller, when the temperature behind the fire-fighting automatic fire valve exceeds a set value (set according to working conditions and generally about 70 ℃), the PLC controller controls the mechanical arm to push the movable pipe so as to enable the movable pipe to be staggered or separated from the waste gas inlet pipe, and at the moment, waste gas in the waste gas inlet pipe is discharged outwards from the breakpoint of the waste gas inlet pipe. The PLC controller controls the mechanical arm to push the movable pipe, so that when the movable pipe and the waste gas inlet pipe are staggered or separated, the PLC controller controls the fan to stop working at the same time, the whole acid mist waste gas recovery and treatment system is protected conveniently, and potential safety hazards such as fire disasters and equipment damage are prevented. When the temperature behind the fire-fighting automatic fire valve is lower than the set value, the PLC controller pushes the movable pipe in the opposite direction by the control mechanical arm, so that the movable pipe returns to the point where the waste gas enters the pipe break point again, and the waste gas enters the pipe and is communicated with the movable pipe at the moment, so that the waste gas can pass through the movable pipe conveniently. The double protection design is adopted, so that the occurrence of safety accidents can be effectively reduced, and the use is safe and reliable.
More preferably: the movable tube both ends are fixed with the silica gel cushion respectively, the silica gel cushion is located the movable tube with waste gas advances between the pipe.
More preferably: the two ends of the movable pipe are both inclined planes, and the inclined directions of the inclined planes at the two ends of the movable pipe are opposite.
More preferably: the acid mist condensation recoverer is used for recovering acid mist from the waste gas.
More preferably: the automatic dosing device comprises a liquid medicine spraying box, a liquid medicine diluting box, a PH probe rod, a medicine conveying pipe and a spraying water pump;
alkali liquor and water are added into the liquid medicine dilution tank, the liquid medicine spraying tank is connected with the liquid medicine dilution tank through a pipeline, and the PH probe rod is used for detecting the PH value in the liquid medicine spraying tank;
the spray water pump is connected with the pesticide conveying pipe and is used for sucking pesticide liquid in the pesticide liquid spray tank into the pesticide conveying pipe, a water mist spray header is installed in the purification tower, and the pesticide conveying pipe is connected with the water mist spray header.
More preferably: the automatic dosing device further comprises a stirring device, and the stirring device is installed on the liquid medicine dilution tank and used for stirring alkali liquor and water in the liquid medicine dilution tank.
More preferably: the purification tower comprises a lower layer, a middle layer, an upper layer and a top layer from bottom to top in sequence, mesh plates are fixed on the top of the lower layer, the middle layer and the upper layer, and polyhedral balls are stacked on the upper surfaces of the mesh plates.
More preferably: the water mist spray header is positioned on the middle layer and the top of the upper layer of the purification tower and is positioned below the mesh plate.
More preferably: the waste gas inlet pipe, the acid mist condensation recoverer, the fan and the purification tower are sequentially connected;
the top of the purification tower is connected with a high-altitude discharge pipe.
More preferably: the waste gas inlet pipe, the acid mist condensation recoverer, the purification tower and the fan are sequentially connected;
the air outlet of the fan is connected with a high-altitude discharge pipe.
In conclusion, the invention has the following beneficial effects: the fire protection device adopts a dual protection design, can effectively reduce the occurrence of safety accidents, and is safe and reliable to use. After the alkaline solution is neutralized with acid gas, the purifying tower is provided with a settling tank to settle dregs, and the purified solution is recycled by a spray water pump. PH probe stick detects the PH value in the liquid medicine sprays the case, and usually speaking, when the PH value of normal alkali lye reached 8 ~ 9, just need to change new alkali lye, and the liquid medicine sprays the alkali lye discharge back in the case, and the rethread liquid medicine dilutes the case and replenishes. The alkali liquor is convenient to replace, can be recycled, and has better environmental protection.
Drawings
FIG. 1 is a schematic structural diagram of example 1, which is mainly used for embodying the structure of an acid mist waste gas recovery processing system;
FIG. 2 is a partial schematic view of the embodiment 1, which is mainly used for embodying the matching structure of the fire-proof device and the exhaust gas inlet pipe;
FIG. 3 is a schematic structural view in example 1, mainly used for embodying the structure of a purification column;
fig. 4 is a schematic structural diagram in embodiment 2, which is mainly used for embodying the structure of the acid mist waste gas recovery processing system.
In the figure, 1, an exhaust gas inlet pipe; 2. a fan; 3. a purification tower; 4. an automatic dosing device; 41. a liquid medicine spraying box; 42. a liquid medicine diluting box; 43. a base; 44. a medicine adding cover; 45. a water inlet pipe; 46. an electromagnetic valve; 47. a drug delivery tube; 48. a spray water pump; 49. a pH probe rod; 5. a fire protection device; 51. a mechanical arm; 52. a movable tube; 53. fire-fighting automatic fire-proof valves; 54. a pre-valve temperature sensing element; 55. a post-valve temperature sensing element; 56. a silica gel cushion; 6. a viewing port; 7. a tray; 8. a lightning rod; 9. a lower layer; 10. a middle layer; 11. an upper layer; 12. a mesh plate; 13. a multi-faceted ball; 14. a high altitude drain pipe; 15. an acid mist condensation recoverer; 16. a top layer; 17. a water mist spray header.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example 1: an acid mist waste gas recovery and treatment system for industrial surface treatment is shown in figures 1, 2 and 3 and comprises a waste gas inlet pipe 1, an acid mist condensation recoverer 15, a fan 2, a purification tower 3, an automatic chemical feeding device 4 and a tray 7. The waste gas inlet pipe 1, the acid mist condensation recoverer 15, the fan 2 and the purification tower 3 are sequentially connected through pipelines. The waste gas inlet pipe 1 is used for introducing waste gas generated by an electroplating process, the acid mist condensation recoverer 15 is used for recovering acid mist from the waste gas, and the purification tower 3 is used for purifying the waste gas after the acid mist is recovered. The fan 2 is used as a power system for sucking waste gas so as to enable the waste gas to flow in the waste gas inlet pipe 1, the acid mist condensation recoverer 15 and the purification tower 3, and the acid mist condensation recoverer 15 is a chromium mist recoverer. The acid mist condensation recoverer 15 is a prior art, and the specific structure and the working principle thereof are not described in detail herein. In order to improve the integrity of the acid mist waste gas recovery treatment system, specifically, the fan 2, the purification tower 3 and the automatic medicine feeding device 4 are all installed on the tray 7. In order to protect the acid mist waste gas recovery and treatment system and prevent lightning stroke, the lightning rod 8 is installed on the tray 7, and the use safety is good. The fan 2 is an HGF4-72 type C-type glass fiber reinforced plastic centrifugal fan.
Referring to fig. 1, 2 and 3, a fire protection device 5 is arranged on the exhaust gas inlet pipe 1, and the fire protection device 5 comprises a PLC controller, a mechanical arm 51, a movable pipe 52, an automatic fire protection valve 53, a pre-valve temperature detection element 54 and a post-valve temperature detection element 55. The fire-fighting automatic fire valve 53 is installed on the exhaust gas inlet pipe 1, and the pre-valve temperature detecting element 54 is used for detecting the pre-valve temperature of the fire-fighting automatic fire valve 53 and transmitting a detection signal to the PLC controller. The post-valve temperature detecting element 55 is used for detecting the post-valve temperature of the fire-fighting automatic fire damper 53 and transmitting a detection signal to the PLC controller. The pre-valve temperature detecting element 54 and the post-valve temperature detecting element 55 are both mounted on the exhaust gas inlet pipe 1. The PLC is used for controlling the opening and closing of the fire-fighting automatic fire-fighting valve 53, the starting and closing of the fan 2 and the starting and closing of the mechanical arm 51, and the mechanical arm 51 is used for grabbing the movable pipe 52 so that the movable pipe 52 is separated from the waste gas inlet pipe 1. The robotic arm 51 is conventional in the art, and the detailed structure and operation thereof will not be described herein. The movable tube 52 is mounted on the robot arm 51 and supported and fixed by the robot arm 51. The exhaust gas inlet pipe 1 is provided with a break point, the movable pipe 52 is arranged at the break point of the exhaust gas inlet pipe 1, and two ends of the movable pipe are respectively in complete contact with the end surface of the exhaust gas inlet pipe 1, so that the movable pipe 52 is communicated with the exhaust gas inlet pipe 1. The movable pipe 52 and the waste gas inlet pipe 1 have the same pipe diameter.
In the above technical scheme, the temperature before the valve of the automatic fire protection valve 53 can be detected by the temperature detection element 54 before the valve, and send the signal to the PLC controller, so as to control the opening and closing of the automatic fire protection valve 53 through the PLC controller, after the temperature before the automatic fire protection valve 53 exceeds a set value (set according to the working condition, generally about 70 ℃), the PLC controller will control the automatic fire protection valve 53 to close, so as to block the waste gas from passing through, and at the same time, the PLC controller will control the fan 2 to stop working, so as to protect the whole acid mist waste gas recovery processing system, thereby preventing the potential safety hazard from occurring, such as fire, equipment damage, and the like. When the temperature in front of the fire-fighting automatic fire-fighting valve 53 is lower than a set value, the PLC controls the fire-fighting automatic fire-fighting valve 53 to be opened, waste gas convenient to pass through, and meanwhile, the PLC controls the fan 2 to start working, and the acid mist waste gas recovery and treatment system starts to operate again.
The fire-fighting automatic fire-fighting valve 53 is made of SUS316L material, fusible polytetrafluoroethylene is sprayed to realize corrosion resistance of the valve, and when the temperature of the waste gas inlet pipe 1 reaches about 70 ℃ (the temperature can be freely set), the fire-fighting automatic fire-fighting valve 53 is automatically closed. The fire-fighting automatic fire valve 53 consists of a valve body, a temperature fuse electric reverse actuator and an electric signal device, and can feed back an electric signal to close the fan 2 in linkage with the PLC controller, so that accidents are prevented.
The temperature detecting element 55 behind the valve can detect the temperature behind the fire-fighting automatic fire-fighting valve 53 and send a signal to the PLC controller, so that the PLC controller can control the mechanical arm 51 to start or stop, when the temperature behind the fire-fighting automatic fire-fighting valve 53 exceeds a set value (set according to working conditions, generally about 70 ℃), the PLC controller will control the mechanical arm 51 to push the movable pipe 52, so that the movable pipe 52 and the waste gas inlet pipe 1 are staggered or separated, and at this time, the waste gas in the waste gas inlet pipe 1 will be discharged outwards from the breakpoint of the waste gas inlet pipe 1. The PLC controller controls the mechanical arm 51 to push the movable pipe 52, so that when the movable pipe 52 is staggered or separated from the waste gas inlet pipe 1, the PLC controller controls the fan 2 to stop working at the same time, the whole acid mist waste gas recovery and treatment system is protected conveniently, and potential safety hazards such as fire, equipment damage and the like are prevented. When the temperature behind the fire-fighting automatic fire valve 53 is lower than the set value, the PLC controls the mechanical arm 51 to push the movable pipe 52 in the opposite direction, so that the movable pipe 52 returns to the broken point of the waste gas inlet pipe 1 again, and the waste gas inlet pipe 1 is communicated with the movable pipe 52 at the moment, so that waste gas can pass through the waste gas inlet pipe 1 and the movable pipe 52 conveniently. And the double protection design is adopted, so that the occurrence of safety accidents can be effectively reduced. The pre-valve temperature detecting element 54 and the post-valve temperature detecting element 55 may be a thermocouple, a thermal resistor, a thermistor, or the like, and are not particularly limited.
Referring to fig. 1, 2 and 3, in order to improve the sealing performance between the movable pipe 52 and the exhaust gas inlet pipe 1 and reduce the leakage of exhaust gas, specifically, two ends of the movable pipe 52 are respectively fixed with a silica gel cushion 56, and the silica gel cushion 56 is located between the movable pipe 52 and the exhaust gas inlet pipe 1. In order to improve the sealing performance between the movable pipe 52 and the exhaust gas inlet pipe 1 and reduce the leakage of exhaust gas, and in order that the mechanical arm 51 can smoothly push the movable pipe 52 out of or into the breakpoint of the exhaust gas inlet pipe 1, specifically, both ends of the movable pipe 52 are inclined planes, and the inclined directions of the inclined planes at both ends of the movable pipe 52 are opposite, so that one side of the breakpoint is wide and the other side is narrow. The inclination angles of the inclined surfaces at the two ends of the movable pipe 52 are both 45 degrees.
Referring to fig. 1, 2 and 3, the purification tower 3 sequentially comprises a lower layer 9, a middle layer 10, an upper layer 11 and a top layer 16 from bottom to top, mesh plates 12 are fixed on the tops of the lower layer 9, the middle layer 10 and the upper layer 11, and polyhedral balls 13 are stacked on the upper surfaces of the mesh plates 12. The top of the purification tower 3 is connected with an overhead discharge pipe 14 for discharging the treated gas to the 15-25 m overhead. The side of the purification tower 3 is provided with three observation ports 6, and the three observation ports 6 are respectively positioned on the middle layer 10, the upper layer 11 and the top layer 16 of the purification tower 3.
Referring to fig. 1, 2 and 3, the automatic medicine feeding device 4 includes a liquid medicine spraying tank 41, a liquid medicine diluting tank 42, a base 43, a PH probe rod 49, a medicine conveying pipe 47, a stirring device (not shown in the figure) and a spraying water pump 48. The liquid medicine diluting tank 42 is filled with alkali liquor and water, a connecting pipe is connected between the liquid medicine spraying tank 41 and the liquid medicine diluting tank 42, and the liquid medicine spraying tank 41 is connected with the liquid medicine diluting tank 42 through a connecting pipe. The connecting pipe is provided with an electromagnetic valve 46 for controlling the liquid medicine to pass through. The base 43 is fixed to the tray 7, and the chemical diluting tank 42 is located outside the purification tower 3 and fixed to the base 43. An opening is arranged on one side of the top of the liquid medicine diluting box 42, a medicine adding cover 44 is arranged on the upper cover of the opening, and alkali liquor is added into the liquid medicine diluting box 42 through the opening. The liquid medicine diluting box 42 is connected with a water inlet pipe 45, one end of the water inlet pipe 45 is connected with an external water supply system, and the other end of the water inlet pipe extends to the upper part inside the liquid medicine diluting box 42. The stirring device is installed on the liquid medicine diluting tank 42 and is used for stirring the alkali liquor and the water in the liquid medicine diluting tank 42 so as to uniformly mix the alkali liquor and the water. The stirring device is the prior art, and the specific structure and the working principle are not described in detail herein.
Referring to fig. 1, 2 and 3, the liquid medicine spraying box 41 is located at the bottom of the lower layer 9 of the purification tower 3, the PH probe rod 49 is used for detecting the PH value of the liquid medicine in the liquid medicine spraying box 41, and the PH probe rod 49 and the electromagnetic valve 46 are respectively electrically connected with the PLC controller. The spray water pump 48 is installed on the chemical liquid spray tank 41, and the spray water pump 48 is connected to the chemical delivery pipe 47 and is used for pumping the chemical liquid in the chemical liquid spray tank 41 into the chemical delivery pipe 47. A water mist spray header 17 is arranged in the purification tower 3, and a pesticide conveying pipe 47 is connected with the water mist spray header 17. The water mist spray header 17 is positioned at the top of the middle layer 10 and the upper layer 11 of the purification tower 3 and below the mesh plate 12. The bottom of the lower layer 9 of the purification tower 3 is provided with a settling tank which is communicated with a liquid medicine spraying tank 41. The bottom of the lower layer 9 of the purification tower 3 is provided with a discharge port for alkali liquor to flow out.
In the technical scheme, the outer body material of the purifying tower 3 is made of heat-resistant polypropylene (PP) and the like, and is anti-aging, and the outer cylinder body is formed in one step by mixing paint in glass fibers, so that the corrosion resistance, the ultraviolet resistance and the aging resistance under the external environment are realized. After the alkaline solution is neutralized with acid gas, the purifying tower 3 is provided with a settling tank to settle dregs, and the purified solution is recycled by a spray water pump 48. The PH probe rod 49 detects the PH value of the alkali liquor in the liquid medicine spraying box 41, usually, when the PH value of the normal alkali liquor reaches 8-9, the alkali liquor needs to be replaced with new alkali liquor, and after the alkali liquor in the liquid medicine spraying box 41 is discharged, the alkali liquor is replenished through the liquid medicine diluting box 42. The alkali liquor is convenient to replace, can be recycled, and has better environmental protection.
Example 2: an acid mist waste gas recovery and treatment system for industrial surface treatment, as shown in fig. 4, is different from embodiment 1 in that a waste gas inlet pipe 1, an acid mist condensation recoverer 15, a purification tower 3 and a fan 2 are connected in sequence. The top layer 16 of the purification tower 3 is connected with an inlet pipeline of the fan 2, and an outlet of the fan 2 is connected with a high-altitude discharge pipe 14 for discharging the treated gas to the high altitude of 15-25 m.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that several improvements and modifications without departing from the principle of the present invention will occur to those skilled in the art, and such improvements and modifications should also be construed as within the scope of the present invention.
Claims (10)
1. The utility model provides an industrial surface treatment is with acid mist waste gas recovery processing system which characterized in that: comprises a waste gas inlet pipe (1), a fan (2) and a purification tower (3);
the waste gas inlet pipe (1) is used for introducing waste gas, the purification tower (3) is used for purifying the waste gas, and the fan (2) is used for sucking the waste gas so as to enable the waste gas to flow in the waste gas inlet pipe (1) and the purification tower (3);
the waste gas inlet pipe (1) is provided with a fire protection device (5), the fire protection device (5) comprises a PLC (programmable logic controller), a mechanical arm (51), a movable pipe (52), an automatic fire protection valve (53), a pre-valve temperature detection element (54) and a post-valve temperature detection element (55), the automatic fire protection valve (53) is installed on the waste gas inlet pipe (1), the pre-valve temperature detection element (54) is used for detecting the pre-valve temperature of the automatic fire protection valve (53) and transmitting a detection signal to the PLC, and the post-valve temperature detection element (55) is used for detecting the post-valve temperature of the automatic fire protection valve (53) and transmitting a detection signal to the PLC;
the PLC controller is used for controlling the automatic fire-fighting valve (53) is opened and closed, the fan (2) is opened and closed and the arm (51) is opened and closed, the arm (51) is used for grabbing the movable pipe (52), so that the movable pipe (52) breaks away from waste gas enters the pipe (1), the waste gas enters and has seted up the breakpoint on the pipe (1), the movable pipe (52) is installed waste gas enters pipe (1) breakpoint department and both ends respectively with waste gas enters pipe (1) contact, so that the movable pipe (52) with waste gas enters pipe (1) intercommunication.
2. The acid mist waste gas recovery processing system for industrial surface treatment as claimed in claim 1, wherein: the activity pipe (52) both ends are fixed with silica gel cushion (56) respectively, silica gel cushion (56) are located activity pipe (52) with waste gas advances between pipe (1).
3. The acid mist waste gas recovery processing system for industrial surface treatment as claimed in claim 2, wherein: the two ends of the movable pipe (52) are both inclined surfaces, and the inclined directions of the inclined surfaces at the two ends of the movable pipe (52) are opposite.
4. The acid mist waste gas recovery processing system for industrial surface treatment as claimed in claim 1, wherein: the waste gas treatment device further comprises an acid mist condensation recoverer (15), wherein the acid mist condensation recoverer (15) is used for recovering acid mist from the waste gas.
5. The acid mist waste gas recovery processing system for industrial surface treatment as claimed in claim 1, wherein: the automatic medicine feeding device (4) comprises a liquid medicine spraying box (41), a liquid medicine diluting box (42), a PH probe rod (49), a medicine conveying pipe (47) and a spraying water pump (48);
alkali liquor and water are added into the liquid medicine dilution tank (42), the liquid medicine spraying tank (41) is connected with the liquid medicine dilution tank (42) through a pipeline, and the PH probe rod (49) is used for detecting the PH value in the liquid medicine spraying tank (41);
the spray water pump (48) is connected with the medicine conveying pipe (47) and is used for sucking the medicine liquid in the medicine liquid spray box (41) into the medicine conveying pipe (47), a water mist spray header (17) is installed in the purification tower (3), and the medicine conveying pipe (47) is connected with the water mist spray header (17).
6. The acid mist waste gas recovery processing system for industrial surface treatment as claimed in claim 5, wherein: the automatic dosing device (4) further comprises a stirring device, and the stirring device is installed on the liquid medicine diluting box (42) and is used for stirring alkali liquor and water in the liquid medicine diluting box (42).
7. The acid mist waste gas recovery processing system for industrial surface treatment as claimed in claim 5, wherein: the purifying tower (3) comprises a lower layer (9), a middle layer (10), an upper layer (11) and a top layer (16) from bottom to top in sequence, wherein mesh plates (12) are fixed on the tops of the lower layer (9), the middle layer (10) and the upper layer (11), and polyhedral balls (13) are stacked on the upper surfaces of the mesh plates (12).
8. The acid mist waste gas recovery processing system for industrial surface treatment as claimed in claim 7, wherein: the water mist spray header (17) is positioned on the top of the middle layer (10) and the upper layer (11) of the purification tower (3) and is positioned below the mesh plate (12).
9. The acid mist waste gas recovery processing system for industrial surface treatment as claimed in claim 4, wherein: the waste gas inlet pipe (1), the acid mist condensation recoverer (15), the fan (2) and the purification tower (3) are connected in sequence;
the top of the purification tower (3) is connected with a high-altitude discharge pipe (14).
10. The acid mist waste gas recovery processing system for industrial surface treatment as claimed in claim 4, wherein: the waste gas inlet pipe (1), the acid mist condensation recoverer (15), the purification tower (3) and the fan (2) are connected in sequence;
and an air outlet of the fan (2) is connected with a high-altitude discharge pipe (14).
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| CN201911180651.2A CN110975567A (en) | 2019-11-27 | 2019-11-27 | Acid mist waste gas recovery processing system for industrial surface treatment |
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| CN201911180651.2A CN110975567A (en) | 2019-11-27 | 2019-11-27 | Acid mist waste gas recovery processing system for industrial surface treatment |
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