CN202519270U - Pressure regulating and releasing device for blast furnace raw gas and temperature control and dedusting device for blast furnace gas - Google Patents
Pressure regulating and releasing device for blast furnace raw gas and temperature control and dedusting device for blast furnace gas Download PDFInfo
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- CN202519270U CN202519270U CN 201220074939 CN201220074939U CN202519270U CN 202519270 U CN202519270 U CN 202519270U CN 201220074939 CN201220074939 CN 201220074939 CN 201220074939 U CN201220074939 U CN 201220074939U CN 202519270 U CN202519270 U CN 202519270U
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- gas
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Abstract
The utility model discloses a pressure regulating and releasing device for blast furnace raw gas and a temperature control and dedusting device for blast furnace gas. The pressure regulating and releasing device for blast furnace raw gas comprises a king butterfly valve, a flashboard valve, a raw gas pressure reducing valve group and a releasing tower, which are all connected in sequence through a pipeline; the pressure regulating and releasing device for blast furnace raw gas is directly communicated with a raw gas pipeline, and the pressure regulating and releasing device for blast furnace raw gas and a bag type deduster are arranged in parallel; and the temperature control and dedusting device for blast furnace gas comprises a temperature reduction device and a bag type deduster, and further comprises the pressure regulating and releasing device for blast furnace raw gas, and the temperature reduction device and the raw gas pipeline are connected and arranged in front of the bag type deduster. The pressure regulating and releasing device for blast furnace raw gas and the temperature control and dedusting device for blast furnace gas have the advantages that the equipment wear can be reduced, the dust accumulation can be avoided and the service life is long; and the blast furnace gas, which does not meet the dedusting conditions, is subjected to releasing treatment timely and rapidly, so as to effectively avoid the gas damage to the bag type deduster, and stably control and regulate the blast furnace top pressure.
Description
Technical field
The utility model relates to the setting device of blast furnace gas treatment facility, more particularly, relates to a kind of blast furnace raw gas pressure regulation bleeding device.
Background technology
In steel manufacture process, more than 70% of energy consumption xanthenes steel comprehensive energy consumption of ironmaking system (comprising operations such as coking, sintering, blast furnace), so the energy-conservation of ironmaking system is to realize one of emphasis that the iron and steel flow process is energy-conservation.The energy consumption that reduces ironmaking system is a systems engineering; And the blast furnace gas dry dusting technology is one of important technology wherein; This Technology have efficiency of dust collection height, without sewage discharge, reduced investment, occupation of land less, water saving, economize on electricity, gas heat be high, can increase advantage such as TRT generated energy; Be that the multiple benefit of collection is iron and steel enterprise's energy-conserving and environment-protective new technology of one, significant for applying of blast furnace gas dry dusting technology for the energy-saving and emission-reduction of iron and steel enterprise.
The blast furnace gas dry dusting of present domestic steel mill generally adopts the bag-type dust method, and the safety of cloth bag is the key problem in technology of blast furnace gas dry dusting.From the cloth bag material and the structure of domestic employing, its normal working temperature scope is generally 90～250 ℃.Because the complicacy of blast-furnace smelting; Especially at blast furnace opening, baker initial stage, furnace shutdown period or when situation such as stockline, hanging, slump material occurring falling, cause the unusual of fly-ash separator ingress gas temperature easily, if the too high cloth bag that then possibly burn out of gas temperature; Or gas temperature low excessively (≤80 ℃) then will cause the dust dewfall; Become pasty state or harden, and it is airtight " to stick with paste cloth bag dead ", this all can't guarantee the ordinary production of blast furnace.
For guaranteeing the operating safety of fly-ash separator cloth bag, present temperature control mainly is to carry out through the mode that heat sink is set.This mode is to utilize the principle of heat exchange to lower the temperature, and its heat exchange medium of selecting for use can be divided into two kinds: first kind is flue gas or air, and a kind of in addition is water.This mode especially has treatment effect preferably when conditions of blast furnace is stablized in practical application; But at blast furnace opening, baker initial stage, furnace shutdown period or situation such as stockline, hanging, slump material following time occurs falling; This mode has significant limitation on the contrary; Cause defectives such as temperature control is untimely, temperature adjustment scarce capacity easily, had a strong impact on the operation of fly-ash separator, be difficult to adapt to the smelting requirements of blast furnace.
The utility model content
To the deficiency that exists in the prior art, the blast furnace raw gas pressure regulation bleeding device that the purpose of the utility model is that the stable control of a kind of ability, adjusting blast furnace top pressure are provided and avoids damaging sack cleaner
To achieve these goals; The one side of the utility model provides a kind of blast furnace raw gas pressure regulation bleeding device; Said blast furnace raw gas pressure regulation bleeding device comprises total butterfly valve, push-pull valve, the raw gas reducing valve group that is linked in sequence through pipeline and diffuses tower; Said blast furnace raw gas pressure regulation bleeding device directly is communicated with the raw gas pipeline and the parallelly connected setting with fiber bag precipitator of said blast furnace raw gas pressure regulation bleeding device
According to the described blast furnace raw gas of the utility model pressure regulation bleeding device, said total butterfly valve is an electric butterfly valve.
According to the described blast furnace raw gas of the utility model pressure regulation bleeding device, said push-pull valve is all-sealed push-pull valve.
According to the described blast furnace raw gas of the utility model pressure regulation bleeding device, said raw gas reducing valve group comprises four valve group arms, and every valve group arm is provided with one butterfly valve.
According to the described blast furnace raw gas of the utility model pressure regulation bleeding device, said blast furnace raw gas pressure regulation bleeding device is processed by high-abrasive material.
The utility model a kind of blast furnace gas temperature control cleaning apparatus is provided on the other hand; Said blast furnace gas temperature control cleaning apparatus comprises heat sink and fiber bag precipitator; Said heat sink and raw gas pipe connection also are arranged on before the fiber bag precipitator, and said blast furnace gas temperature control cleaning apparatus also comprises above-mentioned blast furnace raw gas pressure regulation bleeding device.
According to the described blast furnace gas temperature control of the utility model cleaning apparatus, said blast furnace raw gas pressure regulation bleeding device is parallelly connected with the pipeline at heat sink and fiber bag precipitator place.
According to the described blast furnace gas temperature control of the utility model cleaning apparatus, said blast furnace raw gas pressure regulation bleeding device is arranged on after the heat sink and is parallelly connected with fiber bag precipitator.
Blast furnace raw gas pressure regulation bleeding device of the utility model and the blast furnace gas temperature control cleaning apparatus that this blast furnace raw gas pressure regulation bleeding device is set have can reduce equipment attrition, avoid advantages such as dust stratification and long service life; Can quickly the blast furnace gas that does not satisfy the dedusting condition be diffused processing, effectively avoid coal gas to the infringement of sack cleaner and can stablize control, regulate blast furnace top pressure.
Description of drawings
Fig. 1 is the structural representation of the utility model blast furnace raw gas pressure regulation bleeding device.
Fig. 2 A is the side-view of the raw gas reducing valve group of the utility model blast furnace raw gas pressure regulation bleeding device.
Fig. 2 B is the syndeton synoptic diagram of the raw gas reducing valve group of the utility model blast furnace raw gas pressure regulation bleeding device.
Main description of reference numerals:
The total butterfly valve of 1-, 2-push-pull valve, 3-inlet end socket, 4-prop up butterfly valve, 5-valve group arm, 6-outlet end socket, 7-and diffuse tower, 8-raw gas reducing valve group, 9-pipeline.
Embodiment
The utility model those skilled in the art hereinafter, will describe the embodiment of the utility model in detail, so that can implement the utility model easily with reference to accompanying drawing.
Fig. 1 is the structural representation of the utility model blast furnace raw gas pressure regulation bleeding device.As shown in Figure 1, in an embodiment of the utility model, blast furnace raw gas pressure regulation bleeding device comprises total butterfly valve 1, push-pull valve 2, the raw gas reducing valve group 8 that is linked in sequence through pipeline 9 and diffuses tower 7.The blast furnace raw gas pressure regulation bleeding device of the utility model directly is communicated with the raw gas pipeline, and parallelly connected setting with fiber bag precipitator, can in time diffuse the raw gas that does not meet the dedusting condition, and regulates the pressure of blast furnace furnace roof.
Under the situation of not diffusing raw gas; In order to cut off raw gas reliably; Make raw gas can all get into dust-removal system, the front portion of diffusing regulator at the utility model blast furnace raw gas is provided with total butterfly valve 1 and push-pull valve 2, thereby has solved the problem that push-pull valve 2 unidirectional pressurizeds can't be opened.
Particularly, total butterfly valve 1 can be electric butterfly valve, thereby it realizes opening and closing the function that realization is regulated through electrical signal.When the raw gas situation is unusual, can be through regulating the aperture of total butterfly valve 1, in time import raw gas in the blast furnace raw gas pressure regulation bleeding device and control the influx of raw gas.Before diffusing raw gas, at first with total butterfly valve 1 complete shut-down,, make the pressure reduction of push-pull valve 2 both sides be no more than 50kPa through all pressing or the mode of pressure release, the standard-sized sheet push-pull valve 2 then, at last according to the fluctuations in discharge of raw gas, the total butterfly valve 1 of standard-sized sheet gradually.At this moment, before raw gas flow to raw gas relief valve group 8 through total butterfly valve 1 and push-pull valve 2 successively, blast furnace top pressure was regulated control by raw gas relief valve group 8 gradually, and raw gas carries out ignition and diffuses through diffusing tower 7.
Consider the high temperature (moment can reach 600 ℃) and the high (10～16g/Nm of dust content of raw gas
3) etc. characteristics, taked special design on total butterfly valve 1 of the utility model and the structure of push-pull valve 2, to improve the wear resistance and the high thermal resistance of equipment, prolonged work-ing life and improved performance accuracy and security.
Particularly, the valve body of total butterfly valve 1 adopts cast steel, and the trim of valve seat adopts the pile-up welding hard alloy steel, and valve plate adopts chromemolybdenum steel, and the valve plate sealing-ring adopts stainless steel; Valve is specially the hard sealing electric butterfly valve of three eccentric all-metals, and the valve back shaft adopts the external placed type bearing and is equipped with filling plant.
Push-pull valve 2 is all-sealed push-pull valve.Preferably, the valve expander of push-pull valve 2 adopts double-deck 316L stainless steel; The running gear of valve plate is last driving chain wheel, chain structure, and change gear is on top; Unclamping, compress, walking to be provided with and push up the wheel location of valve plate pushed up wheel and the location can not be occurred, moves otherwise will influence valve plate; The trim water-cooling system is set, 300 ℃ of sealing-ring heatproofs; A plurality of up and down positions at valve plate are provided with roller guide assembly, in the position that roller limits, move when valve plate is moved in working order, guarantee the thorough disengaging of valve plate and valve seat, make valve motion steady; The device that guarantees valve plate walking levelness must be set, ensure the accuracy of mesh of the full domain of walk inner sprocket of valve plate, chain; Casing band nitrogen gas seal equipment, sealing load is constant and can freely set, and wears nitrogen self-forced reducing valve and SV; Ash discharge funnel and valve are established in clack box base plate middle part; Valve plate adopts electric clamping device, forms multiple spot by many sleeve screw rods screw and steps up, and through each clamping point of bull gear transmission, guarantees that each point steps up synchronously by electric device, reducer of turbodrill, and synchronous error is less than 0.5mm; The inboard is provided with protective casing, gets into expander to prevent dust.
Fig. 2 A is the side-view of the raw gas reducing valve group of the utility model blast furnace raw gas pressure regulation bleeding device, and Fig. 2 B is the syndeton synoptic diagram of the raw gas reducing valve group of the utility model blast furnace raw gas pressure regulation bleeding device.Shown in Fig. 2 A and 2B; Raw gas reducing valve group 8 in the utility model comprises four valve group arms 5; Valve group arm 5 is erected at inlet end socket 3 and exports on the end socket 6; Every valve group arm 5 is provided with one butterfly valve 4,4 apertures through controlling each butterfly valve with open the pressure that number can be controlled the air input of every valve group arm 5 and control the blast furnace furnace roof then, said butterfly valve 4 can be electric butterfly valve or hydraulic butterfly valve.
Because raw gas is through raw gas reducing valve group 8 time; Flow velocity is fast and be prone to form jet, especially when raw gas reducing valve group 8 when carrying out the maller angle adjusting, the instantaneous velocity of raw gas possibly surpass 150m/s; This high-speed jet may cause the strong disturbance of whole coal gas stream; Form a series of turbulent flows that vary in size and vortex and produce pressure pulse, this can bring very big detrimentally affect to raw gas reducing valve group 8 and pipeline, shortens or the like like sharpness of regulation variation, service life of equipment.Consider that from above-mentioned factor raw gas reducing valve group 8 adopts four valve block structures, and at its front and back inlet porting end socket 3 and outlet end socket 6.Preferably, the water conservancy diversion form that on each root valve group arm 5, adopts the undergauge Taper Pipe to combine with the diffusion Taper Pipe is to reduce the impact and the perturbation action of coal gas stream to a certain extent.
When stating raw gas reducing valve group 8 control top pressures in the use; Through adopting the common adjusting pattern of two or more butterfly valve 4 parallel connections; The variable range of raw gas reducing valve group 8 is increased greatly; Both improved the performance characteristics of a butterfly valve 4, big flow and low discharge requirement when having satisfied during raw gas diffuses blast furnace production process; Also improved simultaneously the working conditions of each valve and pipeline, when keeping valve characteristic, prolonged the life-span and improved adjusting stability; From another point of view, this also helps keeping the stable smooth operation of the stable and conditions of blast furnace of top pressure.
Also consider characteristics such as raw gas temperature height, dust content height, also on the structure of raw gas reducing valve group 8, taked unique design, to improve the wear resistance and the high thermal resistance of equipment.
Preferably, a butterfly valve 4 is the hard clips shell type of three an eccentric all-metals butterfly valve, the bearing external structure; The valve body monoblock casting, the whole hardfacing alloy of inner chamber, surfacing hardness HRC38～42, built-up welding thickness >=4mm; The valve plate sealing-ring adopts the 316L stainless steel, whole circle setting treatment.The control accuracy of butterfly valve 4 specifically should reach: sealing pair blows and decreases 5% of spillage≤rated flow of causing.Sharpness of regulation reaches 1%, and the time of response is less than 0.5s, standard-sized sheet or full cut-off time≤45s, feedback signal aperture and actual aperture error＜0.5%; Regulate dead band≤0.5%, regulation range 0～100%; Take the antiscour measure, reducing valve chuck nominal pressure 0.6MPa.In order to prevent dust stratification, the chuck downside of reducing valve group 8 (from the horizontal by 45 °) is established and is diffused mouth.
Diffuse tower 7 and be used for raw gas is carried out ignition process, make that raw gas is stable fully to be diffused after the burning, must guarantee that tempering does not take place, take off phenomenon such as fire.In general, diffuse tower 7 and comprise nitrogen pipeline, gas line, ignition device, pylon etc.Preferably, the main burner in the ignition device all adopts heat-resistance stainless steel 310S to process; Molecular sealer adopts heat-resistance stainless steel 304 to process; Windsheild adopts heat-resistance stainless steel 310S to process; Injecting tube is set in the lighter for ignition, adopts partly-premixed air combustion mode, to strengthen the rigidity of flame.
Particularly; The blast furnace raw gas pressure regulation bleeding device of the utility model is arranged in the blast furnace gas temperature control cleaning apparatus; Blast furnace gas temperature control cleaning apparatus also comprises heat sink and fiber bag precipitator, and heat sink and raw gas pipe connection also are arranged on before the fiber bag precipitator.Heat sink is used for the general using cooling water temperature is handled in the direct cooling of blast furnace gas; Fiber bag precipitator then is used for the dedusting to blast furnace gas, carries out follow-up utilization to obtain purified gas.Preferably, the pipeline at blast furnace raw gas pressure regulation bleeding device and heat sink and fiber bag precipitator place is parallelly connected, promptly not to the raw gas that does not meet the dedusting condition processing of lowering the temperature, and it is directly sent into blast furnace raw gas pressure regulation bleeding device; Perhaps blast furnace raw gas pressure regulation bleeding device is arranged on after the heat sink and is parallelly connected with fiber bag precipitator; Can be earlier to the raw gas that does not meet the dedusting condition lower the temperature handle after; If the raw gas temperature is still higher; Again raw gas is sent into blast furnace raw gas pressure regulation bleeding device and diffuse, concrete installation embodiment can in the light of actual conditions be selected.
The mode of operation of the utility model blast furnace raw gas pressure regulation bleeding device will be described below.
When conditions of blast furnace was unusual, the coal gas continuous high temperature was lowered the temperature raw gas earlier through heat sink, if temperature still can not be fallen, then switch to the emission coal gas mode gradually, made raw gas not get into sack cleaner and got into blast furnace raw gas pressure regulation bleeding device; When consecutive low temperature coal gas occurring, can directly pass through blast furnace raw gas pressure regulation bleeding device emission coal gas, make raw gas not get into sack cleaner at blast furnace opening, during the baker initial stage or when conditions of blast furnace is unusual.
Blast furnace raw gas pressure regulation bleeding device directly is communicated with the raw gas pipeline, when diffusing raw gas, at first keeps the complete shut-down state of total butterfly valve 1; Through all pressing or the mode of pressure release, make the pressure reduction of push-pull valve 2 both sides be no more than 50kPa, the standard-sized sheet push-pull valve 2 then; Again according to the fluctuations in discharge situation of raw gas; The total butterfly valve 1 of standard-sized sheet switches to the emission coal gas mode gradually gradually, and raw gas all gets in the blast furnace raw gas pressure regulation bleeding device through total butterfly valve 1.At this moment, before raw gas flow to raw gas relief valve group 8 through total butterfly valve 1 and push-pull valve 2 successively, blast furnace top pressure was regulated control by raw gas relief valve group 8 gradually, and raw gas carries out ignition and diffuses through diffusing tower 7 at last.Regulate the aperture and the control and the adjusting of opening number realization blast furnace top pressure of four butterfly valves 4 of raw gas reducing valve group during this time.When gas temperature satisfies the operating requirement of fly-ash separator cloth bag; Progressively stop to diffuse raw gas; Switch to the bag-type dust mode gradually through closing each butterfly valve 4 on the raw gas reducing valve group 8, total butterfly valve 1 and push-pull valve 2; Raw gas can be directly or is handled the back via the heat sink cooling and get into sack cleaner and carry out dust removal process, this moment blast furnace top pressure control and regulate and accomplish by purified gas reducing valve group.
In sum; Blast furnace raw gas pressure regulation bleeding device of the utility model and blast furnace gas temperature control cleaning apparatus; Can quickly the blast furnace gas that does not satisfy the dedusting condition be diffused processing, effectively avoid coal gas to the infringement of sack cleaner and can stablize control, regulate blast furnace top pressure; In addition, also have advantages such as wear-resistant, accumulatingdust, life-span be long.
Although described the blast furnace raw gas pressure regulation bleeding device and the blast furnace gas temperature control cleaning apparatus of the utility model with reference to the embodiment of the utility model; But those skilled in the art will be appreciated that; Under the situation of spirit that does not break away from the utility model and scope, can make various forms of changes to embodiment.
Claims (8)
1. blast furnace raw gas pressure regulation bleeding device; It is characterized in that; Said blast furnace raw gas pressure regulation bleeding device comprises total butterfly valve, push-pull valve, the raw gas reducing valve group that is linked in sequence through pipeline and diffuses tower that said blast furnace raw gas pressure regulation bleeding device directly is communicated with the raw gas pipeline and the parallelly connected setting with fiber bag precipitator of said blast furnace raw gas pressure regulation bleeding device.
2. blast furnace raw gas pressure regulation bleeding device according to claim 1 is characterized in that said total butterfly valve is an electric butterfly valve.
3. blast furnace raw gas pressure regulation bleeding device according to claim 1 is characterized in that said push-pull valve is all-sealed push-pull valve.
4. blast furnace raw gas pressure regulation bleeding device according to claim 1 is characterized in that said raw gas reducing valve group comprises four valve group arms, and every valve group arm is provided with one butterfly valve.
5. blast furnace raw gas pressure regulation bleeding device according to claim 1 is characterized in that, said blast furnace raw gas pressure regulation bleeding device is processed by high-abrasive material.
6. blast furnace gas temperature control cleaning apparatus; Comprise heat sink and fiber bag precipitator; Said heat sink and raw gas pipe connection also are arranged on before the fiber bag precipitator; It is characterized in that said blast furnace gas temperature control cleaning apparatus also comprises like the described blast furnace raw gas of one of claim 1 to 5 pressure regulation bleeding device.
7. blast furnace gas temperature control cleaning apparatus according to claim 6 is characterized in that, said blast furnace raw gas pressure regulation bleeding device is parallelly connected with the pipeline at heat sink and fiber bag precipitator place.
8. blast furnace gas temperature control cleaning apparatus according to claim 7 is characterized in that, said blast furnace raw gas pressure regulation bleeding device is arranged on after the heat sink and is parallelly connected with fiber bag precipitator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220074939 CN202519270U (en) | 2012-03-02 | 2012-03-02 | Pressure regulating and releasing device for blast furnace raw gas and temperature control and dedusting device for blast furnace gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220074939 CN202519270U (en) | 2012-03-02 | 2012-03-02 | Pressure regulating and releasing device for blast furnace raw gas and temperature control and dedusting device for blast furnace gas |
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| Publication Number | Publication Date |
|---|---|
| CN202519270U true CN202519270U (en) | 2012-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220074939 Expired - Lifetime CN202519270U (en) | 2012-03-02 | 2012-03-02 | Pressure regulating and releasing device for blast furnace raw gas and temperature control and dedusting device for blast furnace gas |
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| Country | Link |
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| CN (1) | CN202519270U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320563A (en) * | 2013-06-14 | 2013-09-25 | 上海宝锋工程技术有限公司 | Treatment system of furnace top gas of COREX vertical furnace and treatment method thereof |
-
2012
- 2012-03-02 CN CN 201220074939 patent/CN202519270U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320563A (en) * | 2013-06-14 | 2013-09-25 | 上海宝锋工程技术有限公司 | Treatment system of furnace top gas of COREX vertical furnace and treatment method thereof |
| CN103320563B (en) * | 2013-06-14 | 2015-09-02 | 上海宝锋工程技术有限公司 | A kind of COREX shaft furnace stock gas treatment system and treatment process thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121107 |
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| CX01 | Expiry of patent term |