CN204042077U - Pneumatic three-way switching valve is used in sinter fume circulation - Google Patents
Pneumatic three-way switching valve is used in sinter fume circulation Download PDFInfo
- Publication number
- CN204042077U CN204042077U CN201420379792.3U CN201420379792U CN204042077U CN 204042077 U CN204042077 U CN 204042077U CN 201420379792 U CN201420379792 U CN 201420379792U CN 204042077 U CN204042077 U CN 204042077U
- Authority
- CN
- China
- Prior art keywords
- valve plate
- valve
- flue gas
- sinter fume
- way
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The utility model relates to sinter fume cycle art, particularly relates to a kind of three-way switch valve.Pneumatic three-way switching valve is used in a kind of sinter fume circulation, comprise three-way valve body, main smoke pipe and flue gas recirculation pipe two parts are divided in three-way valve body, described main smoke pipe and flue gas recirculation pipe are equipped with independently cylinder driver and a valve plate combined mechanism all respectively, described valve plate combined mechanism comprises valve plate, stem shaft, connecting rod and tube wall contact block, described stem shaft is arranged on the center of valve plate, described connecting rod one end is connected with stem shaft, the connecting rod the other end is connected with the driveshaft of cylinder driver, described tube wall contact block is arranged on the inwall of main smoke pipe and flue gas recirculation pipe, tube wall contact block seals with the edges co-operate of valve plate and contacts.The utility model greatly reduces moment of torsion and the vibrations of drive unit, adds the valve plate degree of balance, ensure that sealing, valve plate uniform force, can increase by bearing capacity, not yielding, is applicable to the special operation condition of sinter fume.
Description
Technical field
The utility model relates to sinter fume cycle art, particularly relates to a kind of three-way switch valve.
Background technique
Sintering plant revamp is high, exhausted air quantity is large, seriously polluted, utilization rate of waste heat is low, is always the Focal point and difficult point of iron and steel enterprise's low temperature heat and waste gas pollution control and treatment.Research shows, sintered discharge gas recycles and not only significantly can reduce the toxic emission total amount and pollutant discharge amount that sintering process produces, and can low temperature exhaust heat in recovered flue gas, save sintering plant revamp, there are great energy-saving and emission-reduction and be worth.Therefore, sintered discharge gas circulation arouses extensive attention at home and abroad.
Sintered discharge gas circulation technology principle: as shown in Figure 1, sintering machine partial hot waste gas is re-introduced in sintering process process, when high-temperature hot flue gas cycles through sinter bed again, because the auto accumulation heat effect of heat exchange and sinter bed can by the low temperature sensible heat of waste gas supply sinter mixture, CO in circulating flue gas rekindles, and reaches UTILIZATION OF VESIDUAL HEAT IN, saves the effect of sintering process energy consumption.In addition, be intensely decomposed during the sintering belt of the organic pollutant such as the dioxin in heat smoke, PAHs, VOC up to more than 1300 DEG C in by sinter bed, NOx also can be destroyed through thermolysis part, significantly can reduce the discharge amount of the organic pollutant such as NOx, dioxin thus.
The original discharge mode of sintering device flue gas is: each arm flue gas of sintering machine wind box, drains into large flue respectively, deliver to electrical precipitator dedusting after mixing through main exhauster, then after desulfurization, pass through stack emission.When setting up the sinter fume circulatory system, need several three-way switch valves supporting, to realize sintering the switching of arm flue gas to smoke circulating system.Namely when smoke circulating system works, closed portion arm flue gas leads to the valve of large flue, open the valve that these specific arm flue gases lead to smoke circulating system, circulating flue gas again returns sinter bed after dedusting, supercharging, is realized the object of energy-saving and emission-reduction by cycle sintering.
High 4 ~ the 10g/m of sinter fume dust concentration
3particle is thick, corner angle are sharp, chiseling property of mill is strong, wind speed 10 ~ 20m/s and more than negative pressure-15000Pa in main smoking road, and undulate quantity is large, sintering arm diameter is large, and generally at 0.7 ~ 1.2m, flue-gas temperature is up to 100 ~ 350 DEG C, these bad working environments can aggravate valve wear and dust deposited in pipeline, bring difficulty to regular maintenance; Meanwhile, in flue gas system handoff procedure, because Sinter air machine and circulating fan can be opened simultaneously, the frequent variations of pressure reduction can aggravate the vibrations of valve plate, brings test to valve seal.Therefore, in the sinter fume circulatory system, to valve plate intensity, sealing, speed of response, the working life of three-way switch valve with safeguard that convenience all has higher requirements.Traditional electric three passes slat belt switching valve belongs to Hard link due to electric actuator and valve, objective reality gap in Electric actuator worm gear and keyway, when valve plate is by tight closing, because wind speed and air quantity are very large, just started to cause valve plate to be in small vibrations, along with gap increases, vibrations strengthen, long-time running, finally causes pin between valve plate with axle to be connected fracture.So plant the operating mode that the board-like mortor operated valve of single valve is difficult to meet sinter fume circulation, cannot normally use for a long time.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of sinter fume circulation Pneumatic three-way switching valve, this three-way switch valve is provided with two independently valve plates, and stem shaft design is at valve plate center, greatly reduce moment of torsion and the vibrations of drive unit, add the valve plate degree of balance, ensure that sealing, valve plate uniform force, can increase by bearing capacity, not yielding, be applicable to the special operation condition of sinter fume.
The utility model is achieved in that a kind of sinter fume circulation Pneumatic three-way switching valve, comprise three-way valve body, the turnover port of described three-way valve body is provided with flange, main smoke pipe and flue gas recirculation pipe two parts are divided in three-way valve body, the air inlet port of three-way valve is arranged on main smoke pipe, described main smoke pipe and flue gas recirculation pipe are equipped with independently cylinder driver and a valve plate combined mechanism all respectively, described valve plate combined mechanism comprises valve plate, stem shaft, connecting rod and tube wall contact block, described stem shaft is arranged on the center of valve plate, described connecting rod one end is connected with stem shaft, the connecting rod the other end is connected with the driveshaft of cylinder driver, described tube wall contact block is arranged on the inwall of main smoke pipe and flue gas recirculation pipe, tube wall contact block seals with the edges co-operate of valve plate and contacts.
Described three-way valve body is also provided with inspection manhole.
Filter screen is provided with between described main smoke pipe and flue gas recirculation pipe.
The line cross section of described three-way valve body is rectangle or circle.
The utility model sinter fume circulation Pneumatic three-way switching valve inside arranges two independently valve plate combined mechanisms, two valve plates alternate conduction under the control of drive unit, reaches the object changing flue gas flow direction.Stem shaft design, at valve plate center, greatly reduces moment of torsion and the vibrations of drive unit, adds the valve plate degree of balance, ensure that sealing, valve plate uniform force, can increase by bearing capacity, not yielding.Because cylinder is in gas storage state always, so valve is in when opening or be in closed condition more can overcome the vibrations that wind speed causes.In sinter fume circulation, even if some microseismic activity of valve plate, because the relative motorized motions of pneumatic drive is soft strength, between valve plate with axle, pin is connected also not easy-rupturing; Valve plate edge contacts with tube wall contact block and seals, and treats that contact block may wear to a certain degree, when being affected with the sealing of tube wall, can change in time, good sealing effect, and repair and maintenance is convenient; This device shows well in actual use, and structure is simple, safe and reliable, wear resistance, resistance to erosion, is applicable to the special operation condition of sinter fume.
Accompanying drawing explanation
Fig. 1 is sintered discharge gas circulation technology schematic diagram;
Fig. 2 is the structural representation of the utility model sinter fume circulation Pneumatic three-way switching valve;
Fig. 3 is the A-A cross-sectional schematic of Fig. 2.
In figure: 1 main smoke pipe, 2 flue gas recirculation pipes, 3 cylinder drivers, 4 valve plate combined mechanisms, 5 inspection manholes, 6 filter screens, 41 valve plates, 42 stem shaft, 43 connecting rods, 44 tube wall contact blocks.
Embodiment
Below in conjunction with specific embodiment, set forth the utility model further.Should be understood that these embodiments are only not used in restriction scope of the present utility model for illustration of the utility model.In addition should be understood that those skilled in the art can make various changes or modifications the utility model, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the utility model statement.
Embodiment 1
As Fig. 2, shown in 3, Pneumatic three-way switching valve is used in a kind of sinter fume circulation, comprise three-way valve body, three-way valve body is provided with an air inlet port and two air outlet, main smoke pipe 1 and flue gas recirculation pipe 2 two parts are divided in three-way valve body, the cross section of main smoke pipe 1 and flue gas recirculation pipe 2 is rectangle or circle, air inlet port is arranged on main smoke pipe 1 and is communicated with sintering arm by flange, two air outlet are separately positioned on main smoke pipe 1 and flue gas recirculation pipe 2 by flange communication loop flue gas arm and smokejack, described main smoke pipe 1 and flue gas recirculation pipe 2 are equipped with independently cylinder driver 3 and a valve plate combined mechanism 4 all respectively, described valve plate combined mechanism 4 comprises valve plate 41, stem shaft 42, connecting rod 43 and tube wall contact block 44, described stem shaft 42 is arranged on the center of valve plate 41, to reduce moment of torsion and the vibrations of drive unit, increase the valve plate degree of balance, stem shaft 42 two ends are hinged on the outer wall of three-way valve body, described connecting rod 43 one end is connected with stem shaft 42, connecting rod 43 the other end is connected with the driveshaft of cylinder driver 3, described tube wall contact block 44 is arranged on main smoke pipe 1 with on the inwall of flue gas recirculation pipe 2, tube wall contact block 44 seals with the edges co-operate of valve plate 41 and contacts, the pattern firmly sealed is taked between tube wall contact block 44 and valve plate 41, tube wall contact block 44 is antifriction metal (AFM) material, high temperature resistance protective layer is laid on top layer, may wear to a certain degree, can change in time.
For the ease of maintenance, in the utility model, described three-way valve body is also provided with inspection manhole 5.
High for sinter fume dust concentration, institute's particle of sweeping along is large, sometimes diameter can more than 10mm, at valve plate 41, place easily piles up, cause valve plate 41 seal and open fault, and add the follow-up load of dust remove of flue gas recirculation, the utility model is provided with filter screen 6 between described main smoke pipe 1 and flue gas recirculation pipe 2, namely set up a filter screen 6 at the entrance of flue gas recirculation pipe 2, filter screen 6 is that stainless-steel sheet uniform pore openings is made.
In the present embodiment, described cylinder driver 3 is made up of cylinder, driveshaft, pneumatic actuator, gear clutch, rotates around stem shaft 42 for drive valve plate 41, and cylinder driver 3 is connected with stem shaft 42 and adopts light swing-arm type structure; Spring bumper is provided with between pneumatic actuator and valve, can absorbing vibration during operation, avoid the fracture that actuator is connected with valve body.
When sintering process normally runs, sinter fume drains into smokejack via each arm, discharges after dedusting, desulfurization; When smoke circulating system runs, by the control of corresponding three-way valve, closed portion arm flue gas leads to the valve of large flue, and open the valve that these specific arm flue gases lead to smoke circulating system, two valve plate combined mechanisms individually drive.Under normal operation, a valve plate is closed, and another valve plate is opened, to complete the handoff procedure of flue gas.
Facts have proved, this three-way valve is at dust loading 4 ~ 12g/m
3, flue gas flow rate 6m/s, flue gas flow 30m
3/ h, negative pressure 0.15MPa, under the operating mode that cigarette temperature is 250 DEG C, three-way valve leak-down rate is less than 1%, little, the resistance to erosion of valve plate assembly parts long-play wearing and tearing, without dust stratification, do not get stuck, flexible movements, fast response time, the valve opening and closing time is less than 15s, safe and reliable, can realize distant control and automation mechanized operation, therefore, the utility model is applicable to the special operation condition of sinter fume circulation.
Claims (4)
1. Pneumatic three-way switching valve is used in a sinter fume circulation, comprise three-way valve body, the turnover port of described three-way valve body is provided with flange, main smoke pipe (1) and flue gas recirculation pipe (2) two parts are divided in three-way valve body, the air inlet port of three-way valve is arranged on main smoke pipe (1), it is characterized in that: described main smoke pipe (1) and flue gas recirculation pipe (2) are equipped with independently cylinder driver (3) and a valve plate combined mechanism (4) all respectively, described valve plate combined mechanism (4) comprises valve plate (41), stem shaft (42), connecting rod (43) and tube wall contact block (44), described stem shaft (42) is arranged on the center of valve plate (41), described connecting rod (43) one end is connected with stem shaft (42), connecting rod (43) the other end is connected with the driveshaft of cylinder driver (3), described tube wall contact block (44) is arranged on main smoke pipe (1) with on the inwall of flue gas recirculation pipe (2), tube wall contact block (44) seals with the edges co-operate of valve plate (41) and contacts.
2. Pneumatic three-way switching valve is used in sinter fume circulation as claimed in claim 1, it is characterized in that: described three-way valve body is also provided with inspection manhole (5).
3. Pneumatic three-way switching valve is used in sinter fume circulation as claimed in claim 1, it is characterized in that: be provided with filter screen (6) between described main smoke pipe (1) and flue gas recirculation pipe (2).
4. Pneumatic three-way switching valve is used in sinter fume circulation as claimed in claim 1, it is characterized in that: the line cross section of described three-way valve body is rectangle or circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420379792.3U CN204042077U (en) | 2014-07-10 | 2014-07-10 | Pneumatic three-way switching valve is used in sinter fume circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420379792.3U CN204042077U (en) | 2014-07-10 | 2014-07-10 | Pneumatic three-way switching valve is used in sinter fume circulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204042077U true CN204042077U (en) | 2014-12-24 |
Family
ID=52242745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420379792.3U Expired - Lifetime CN204042077U (en) | 2014-07-10 | 2014-07-10 | Pneumatic three-way switching valve is used in sinter fume circulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204042077U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105199749A (en) * | 2015-11-03 | 2015-12-30 | 济南弘科信泰环保技术有限公司 | NOx control method and device for coke oven stack gas |
| CN108661769A (en) * | 2018-05-03 | 2018-10-16 | 中国水产科学研究院渔业机械仪器研究所 | A kind of device merging exhaust for boat diesel engine exhaust pipe |
| CN112780798A (en) * | 2021-01-27 | 2021-05-11 | 北京中冶设备研究设计总院有限公司 | Three-way air intake reversing device applied to sintering flue gas circulation air box vertical pipe |
-
2014
- 2014-07-10 CN CN201420379792.3U patent/CN204042077U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105199749A (en) * | 2015-11-03 | 2015-12-30 | 济南弘科信泰环保技术有限公司 | NOx control method and device for coke oven stack gas |
| CN108661769A (en) * | 2018-05-03 | 2018-10-16 | 中国水产科学研究院渔业机械仪器研究所 | A kind of device merging exhaust for boat diesel engine exhaust pipe |
| CN108661769B (en) * | 2018-05-03 | 2019-09-10 | 中国水产科学研究院渔业机械仪器研究所 | A kind of device merging exhaust for boat diesel engine exhaust pipe |
| CN112780798A (en) * | 2021-01-27 | 2021-05-11 | 北京中冶设备研究设计总院有限公司 | Three-way air intake reversing device applied to sintering flue gas circulation air box vertical pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204042072U (en) | Electronic three-way switch valve is used in sinter fume circulation | |
| CN105650617B (en) | A kind of power plant environment-friendly cycle boiler | |
| CN204042077U (en) | Pneumatic three-way switching valve is used in sinter fume circulation | |
| CN203857787U (en) | Oven waste heat recycling device | |
| CN106823887A (en) | A kind of haze prevention burning coal desulfurization mixing raw materials equipment | |
| CN202028964U (en) | Air door of dust collector for variable air volume regulation type cutting machine and cutting machine subarea dust collector | |
| CN207102296U (en) | A kind of desulfurizing tower | |
| CN102371117A (en) | Venturi tube capable of changing sectional area and CFB absorbing tower thereof | |
| CN201572582U (en) | A Instant Blowing Soot Cleaning Device for Chamber Reverse Blowing Bag Type Dust Collector | |
| CN103277538A (en) | Tee joint switching valve for smoke circulation of sintering machine | |
| CN108006692B (en) | A kind of recycling carrying, which leaks out and directly leaks out, carries out anti-blocking air preheater | |
| CN2897436Y (en) | Feeder of desulfurizing ball mill | |
| CN202470758U (en) | Rotary sintering machine | |
| CN205655312U (en) | Boiler smoke soot blower | |
| CN208397352U (en) | A kind of spherical shearing Double-deck cinder discharge valve | |
| CN211650727U (en) | Energy-saving environment-friendly desulfurization boiler | |
| CN206157013U (en) | A mummification preprocessing device for sludge incineration electricity generation | |
| CN206350955U (en) | A kind of swing type restrains rotational flow dust-removing demister | |
| CN111425873A (en) | A device for dust removal and waste heat utilization of waste incineration flue gas with replaceable dust removal filter material | |
| CN103463889B (en) | The off-line ash-clearing air door of self-pressure deashing sack cleaner and dust collection method thereof | |
| CN108619857A (en) | A kind of flue gas absorber | |
| CN203750359U (en) | Dry-type sewage removing system | |
| CN217108237U (en) | Double-channel flap valve | |
| CN108636057A (en) | A kind of flue gas absorber of recyclable adsorbent | |
| CN103569685B (en) | A kind of feed bin sealed gate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141224 |
|
| CX01 | Expiry of patent term |