Background technology
In galvanizing was produced, dust-laden exhaust gas such as a large amount of effusion ammonium chlorides of top, zinc pond meeting, zinc chloride, zinc fume and zinc oxide dust were not as being controlled, will pollute the workshop, influence HUMAN HEALTH, as not handled, will be discharged into atmospheric environment from the workshop, atmosphere is polluted.For preventing the diffusion of dust-laden exhaust gas, will dispose exhaust emission system, these dust-laden exhaust gas are collected, controlled and handled.
At present a lot of manufacturing enterprises still do not have effective measure of control and specific equipment to top, galvanizing pond waste gas, and part enterprise adopts import equipment, and effect is also desirable not to the utmost.Import equipment mostly adopts the mode of box-shaped seal closure that waste gas is controlled and collected, because galvanizing zinc pond is longer, part reaches more than the 30m, cabinet space is big, the intake-gas amount is corresponding excessive, moreover most of production be the intermittent type input and output material, and the box-shaped seal closure must adopt intermittent type folding gate, this just causes vacuum fan power height, dutycycle height, and the exhaust gas emission effect is subjected to very big restriction.It is big to cause equipment to take up an area of, the cost height.
Summary of the invention
In order to solve the sector at present to the deficiency of waste gas pollution control and treatment aspect, blowing and drawing type gas sampling device on the batch quantity hot dipping zinc pond is proposed, can realize control and collection to top, the galvanizing pond waste gas of big width.Have collection mode novelty, ventilation little, collect waste gas efficient height, the sensitive characteristics such as reliable, cheap of little, easy for operation, simple in structure feasible, the control that takes up room.
Above-mentioned purpose is achieved in that blowing and drawing type gas sampling device on the batch quantity hot dipping zinc pond, a kind of device that is used for the waste gas control of top, the wide galvanizing of 1.2~2.5m pond and collects is provided, this device has adopted blowing and drawing type gas sampling mode, comprise centrifugal fan, low-noise centrifugal ventilator, blowing pipeline, variable valve and air-suction duct, air-suction duct is a uniform cross section rectangle air-suction duct, the blowing pipeline is a variable cross-section blowing pipeline, its changes of section, from reducing successively, be wedge shape away from centrifugal fan direction cross section.Variable cross-section blowing pipeline is installed in one side top, zinc pond, it has the wide strip slit of 10~30mm on the blowing pipeline of zinc pond one side, the blowing mouth assembly is installed on the strip slit, the opposite side in zinc pond is equipped with the uniform cross section rectangle air-suction duct with variable cross-section blowing pipeline equal in length, on one side of zinc pond, the air suction inlet assembly is housed at uniform cross section rectangle air-suction duct, form by five rectangle air suction inlets, each air suction inlet is wide, equidistantly, length is from reducing gradually to blower fan direction one end away from low-noise centrifugal ventilator one end, above uniform cross section rectangle air-suction duct, also be provided with windsheild, air quantity, wind speed can be regulated by two variable valve that are installed in centrifugal blower and pipeline enclosure.
Compare advantage and the positively effect that is had with conventional art
1) upward blowing and drawing type gas sampling device is littler than box-shaped sealing bell-type gas sampling device intake-gas amount, and input and output material need not intermittent type folding gate and destroys the air-flow environment during production, and influences the exhaust gas emission effect.
2) compare with legacy equipment that to have ventilation little, vacuum fan power height, dutycycle are low, save the advantage of energy consumption.
3) it is effective that air curtain is isolated waste gas, collects waste gas efficient height.Air quantity, wind speed can be regulated, the control and the collection of top, galvanizing pond waste gas under suitable different size and the operating mode, and adaptability is good.
4) the equipment occupation of land is little, and consumptive material is few, and operation site is visual strong, does not influence operation.The device activity member is few, and the life-span is long, keeps in repair easy.
Embodiment
Below by specific embodiment the utility model is described in further detail.
Blowing and drawing type gas sampling device on the batch quantity hot dipping zinc pond, comprise centrifugal fan (6), low-noise centrifugal ventilator (3), blowing pipeline (1), variable valve A, B and air-suction duct (4), air-suction duct (4) is a uniform cross section rectangle air-suction duct, blowing pipeline (1) is variable cross-section blowing pipeline, its changes of section, from reducing successively away from centrifugal fan (6) direction cross section, be wedge shape, variable cross-section blowing pipeline (4) is installed in (5) one sides top, zinc pond, it has the wide strip slit of 10~30mm on the blowing pipeline of zinc pond one side, blowing mouth assembly (2) is installed on the strip slit, the opposite side in zinc pond (5) is equipped with the uniform cross section rectangle air-suction duct (4) with variable cross-section blowing pipeline (1) equal in length, have the air suction inlet assembly at uniform cross section rectangle air-suction duct towards zinc pond one side, form by five rectangle air suction inlets (8~12), each air suction inlet is wide, equidistantly, length is from reducing gradually to blower fan direction one end away from low-noise centrifugal ventilator (3) one ends, above uniform cross section rectangle air-suction duct, also be provided with windsheild (7), air quantity, wind speed can be by being installed in centrifugal fan (6), two variable valve A of low-noise centrifugal ventilator (3) and pipeline enclosure, B regulates.
The principle of work of this device is: clean air is sucked by centrifugal fan (6), utilize the variation of blowing pipeline sectional area, spouting through variable cross-section blowing pipeline (1) from blowing mouth assembly (2), form uniform air curtain isobaric, constant speed, top, zinc pond waste gas is sealed; By uniform cross section rectangle air-suction duct (4), realize even air draught by low-noise centrifugal ventilator (3),, gas sampling is got up to be controlled and handle that whole process can be controlled the mobile of top, zinc pond dust-laden exhaust gas effectively with suction air curtain dust-laden exhaust gas down.Be evenly distributed with rectangle air suction inlet (8~12) on the uniform cross section rectangle air-suction duct (4), each rectangle air suction inlet width is identical, length can guarantee that from reducing gradually to blower fan direction one end away from low-noise centrifugal ventilator (3) one ends suction air volume is identical on each air draught cross section.Above uniform cross section rectangle air-suction duct, also be provided with windsheild (7), suck uniform cross section rectangle air-suction duct to stop top, air suction inlet clean air.Top, last zinc pond waste gas is discharged into emission-control equipment through the outlet of low-noise centrifugal ventilator (3) and handles.
Embodiment 1
Blowing and drawing type gas sampling device is made up of centrifugal fan (6), variable cross-section blowing pipeline (1), blowing mouth assembly (2), uniform cross section rectangle air-suction duct (4), low-noise centrifugal ventilator (3), windsheild (7) and air suction inlet assembly (8~12) on the batch quantity hot dipping zinc pond, blowing and drawing type gas sampling device is installed on 10m * top, 1.5m galvanizing pond (5) on the batch quantity hot dipping zinc pond, this device can form air curtain above the zinc pond, waste gas to top, galvanizing pond is controlled and is collected, and makes it be discharged into specified device and handles.This device comprises the blowing device that is installed in one side top, zinc pond, and this blowing device comprises C6-48 No.5A type centrifugal fan (6), rotating speed 1450r/min, total head (550~850) Pa, air quantity (4000~7500) m
3/ h is equipped with motor 2.2kW.Centrifugal fan (6) sucks long variable cross-section blowing pipeline (1) for 10.5m to clean air, this its changes of section of variable cross-section blowing pipeline (1), from reducing successively away from centrifugal fan direction cross section, be wedge shape, can guarantee that air-flow is from blowing mouth (2) when spouting, each cross section speed (9~12) m/s, Pa is identical with air quantity for pressure (15~25), and zinc pond (5) top waste gas is sealed in the limited space.Opposite side in the zinc pond is equipped with air intake device, and this air intake device comprises uniform cross section rectangle air-suction duct (4), and sectional area is (1000 * 800) mm.Five rectangle air suction inlets (8~12) are arranged on the uniform cross section air-suction duct, the cross section, air suction inlet changes successively, realize even air draught, the clean air that blows with effective suction zinc pond (5) top waste gas and blowing device, each wide 300mm in rectangle air suction inlet, spacing 2m, air suction inlet length is from reducing gradually to blower fan direction one end away from low-noise centrifugal ventilator (3) one ends, the long 790mm in air suction inlet (12), the long 730mm in air suction inlet (11), the long 650mm in air suction inlet (10), the long 550mm in air suction inlet (9), the long 500mm in air suction inlet (8), each air suction inlet suction air volume is 1.5m
3/ s.The top, air suction inlet is provided with windsheild (7), length 10.5m, and air-suction duct is equipped with HTFC-III type low-noise centrifugal ventilator (3), total head (350~400) Pa, air quantity (20000-30000) m
3/ h is equipped with motor 7.5kW.At last top, zinc pond waste gas being discharged into emission-control equipment through low-noise centrifugal ventilator (3) handles.
Embodiment 2
Blowing and drawing type gas sampling device is made up of centrifugal fan (6), variable cross-section blowing pipeline (1), blowing mouth assembly (2), uniform cross section rectangle air-suction duct (4), low-noise centrifugal ventilator (3), windsheild (7) and air suction inlet assembly (8~12) on the batch quantity hot dipping zinc zinc pond, blowing and drawing type gas sampling device is installed on 20m * top, 1.5m galvanizing zinc pond (5) on the batch quantity hot dipping zinc pond, this device can form air curtain above the zinc pond, dust-laden exhaust gas to top, galvanizing pond is controlled and is collected, and makes it be discharged into specified device and handles.This device is installed in the blowing device of one side top, zinc pond, and this blowing device comprises C4-72 No.6D type centrifugal fan (6), rotating speed 1450r/min, total head (300~750) Pa, air quantity (6500-13500) m
3/ h is equipped with motor 4kW.Centrifugal fan (6) sucks long variable cross-section blowing pipeline (1) for 21m to clean air, and the characteristics of this variable cross-section blowing pipeline (1) are its changes of section, from reducing successively away from centrifugal fan direction cross section, are wedge shape.Length because of variable cross-section blowing pipeline (1) is the twice of embodiment 1 herein, so that the variation in its cross section is the major part of two wedge shapes is relative, has formed fusiformis broad in the middle, small in ends.Guarantee air-flow from blowing mouth (2) when spouting, Pa is identical with air quantity for speed on each cross section (8~12) m/s, pressure (15~25), and top, zinc pond waste gas is sealed in the limited space.Opposite side in zinc pond (5) is equipped with air intake device, comprises that two are arranged into the uniform cross section rectangle air-suction duct (4) that in-line is placed, and sectional area is 1000 * 800mm.On these two uniform cross section rectangle air-suction ducts five rectangle air suction inlets (8~12) are arranged respectively, realize even air draught, the clean air that blows with effective suction zinc pond top waste gas and blowing device, each wide 300mm in rectangle air suction inlet, spacing 2m, the air suction inlet is from reducing gradually to the blower fan direction away from low-noise centrifugal ventilator (3) one ends, the long 790mm in air suction inlet (12), the long 730mm in air suction inlet (11), the long 650mm in air suction inlet (10), the long 550mm in air suction inlet (9), the long 500mm in air suction inlet (8), each air suction inlet suction air volume is 1.5m
3/ s.The top, air suction inlet is provided with windsheild (7), length 10.5m, and two uniform cross section air-suction ducts are equipped with HTFC-III type low-noise centrifugal ventilator (3) respectively, total head (350~400) Pa, air quantity (20000~30000) m
3/ h is equipped with motor 7.5kW.At last top, zinc pond waste gas being discharged into emission-control equipment through low-noise centrifugal ventilator (3) handles.