CN108193009B - The cooling water system of hot-blast stove and control method - Google Patents
The cooling water system of hot-blast stove and control method Download PDFInfo
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- CN108193009B CN108193009B CN201711495352.9A CN201711495352A CN108193009B CN 108193009 B CN108193009 B CN 108193009B CN 201711495352 A CN201711495352 A CN 201711495352A CN 108193009 B CN108193009 B CN 108193009B
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- 239000000498 cooling water Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000008234 soft water Substances 0.000 claims abstract description 171
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 155
- 238000001816 cooling Methods 0.000 claims abstract description 134
- 238000012423 maintenance Methods 0.000 claims abstract description 18
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 53
- 239000013589 supplement Substances 0.000 claims description 22
- 210000001015 abdomen Anatomy 0.000 claims description 14
- 239000003507 refrigerant Substances 0.000 claims description 14
- 238000007872 degassing Methods 0.000 claims description 11
- 238000011010 flushing procedure Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 8
- 239000000284 extract Substances 0.000 claims description 7
- 239000008235 industrial water Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000009865 steel metallurgy Methods 0.000 abstract description 2
- 238000013016 damping Methods 0.000 description 5
- 241000209140 Triticum Species 0.000 description 4
- 235000021307 Triticum Nutrition 0.000 description 4
- 238000003306 harvesting Methods 0.000 description 4
- 230000003020 moisturizing effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/10—Other details, e.g. blast mains
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
Abstract
The invention discloses the cooling water system of hot-blast stove and control methods, belong to field of steel metallurgy.The present invention includes several hot-blast furnace valves, middle pressure water supply pump group and secondary pressurized pump house, and switch valve I and connecting tube is arranged on the soft water pipeline of the secondary pressurized pump house output；Soft water pipeline after connection branches into each valve of the hot-blast stove and tuyere medium jacket of blast furnace；Tee tube is set from the soft water pipeline that each valve of the hot-blast stove exports, and followed by the water inlet pipe and outlet pipe of tee tube, branch pipe connects the drainpipe of tee tube, be provided with switch valve III on the drainpipe soft water；It connects and is provided with switch valve II on the soft water pipeline of the outlet pipe.The present invention makes the cooling water of hot-blast furnace valve and blast-furnace equipment that can connect together, it again can be with isolated operation, not only guarantee that blast furnace can be carried out cooling wall piping when hot-blast furnace valve is cooling, and rinse water can be quickly provided when blast furnace cooling stave rinses, or even do not influence the cooling of hot-blast furnace valve during blast furnace staying maintenance.
Description
Technical field
The present invention relates to field of steel metallurgy, more specifically to the cooling water system of hot-blast stove and control method.
Background technique
Currently, the cooling water of domestic hot-blast furnace valve is all the blast-furnace soft water together with blast-furnace soft water system connectivity
System is closed-cycle system, is supplied to Blast Furnace Bottom water cooling tube, tuyere big sleeve and middle set, cooling wall, hot-blast valve and damping down valve
Water, middle pressure water is blast furnace advanced stage shower water, and usually using less, the consumption of a small amount of soft water relies on additional soft wa ter in cyclic process
Pump supply.And hot-blast stove is earlier than blast oven, when hot-blast stove baking oven, hot-blast valve and damping down valve are also required to cooling of supplying water, due to heat
The soft water of air-valve and damping down valve is connected to the soft water of blast furnace, this requires the construction of entire soft water system after could be into
The baker of row hot-blast stove, the time for thus causing blast furnace cooling stave piping are at full stretch.During blast furnace maintenance, generally also
The cooling of hot-blast furnace valve is needed to continue to keep, also due to it is to be connected to that the soft water of hot-blast valve and damping down valve, which is with the soft water of blast furnace,
, the cooling water of hot-blast stove can not isolated operation.Therefore, the development of the cooling water system of hot-blast stove and control method for
Have great importance for the debugging of blast-furnace soft water system and the independent water supply of the cooling equipment of hot-blast stove.
Through retrieving, existing patent formula is disclosed.Such as Chinese patent: application number: 2017100099203, publication date: 2017
March 15, a kind of modified blast furnace soft water closed circulation system and method for the disclosure of the invention.The system includes host control
Device, cooling wall cooling unit, expansion and degassing unit, secondary cycle water unit and one cycle water water supplying unit.The present invention adopts
With multichannel vibration means for main pipe for supplying water, system redundancy is improved, guarantees blast fumance safety；Subregion is carried out to cooling wall, classification is facilitated to examine
Leakage reduces cost for steady production and provides guarantee the time required to reducing leak detection；The setting of secondary cycle water rationally reduces secondary cycle
Water cooling equipment operating pressure reduces leak risk, reduces the air content in primary and secondary recirculated water.But its shortcoming exists
Be connected in blast furnace soft water closed circulation system with the soft water of the hot-blast valve of hot-blast stove and damping down valve, thus each valve of hot-blast stove without
Method realizes the independent water supply of cooling equipment.
It is for another example Chinese: application number: 971081840, publication date: on 2 17th, 1999, the invention provides one kind at
Group uses the water-saving cooling system of blast funnace hot blast stove valve, and cardinal principle is by the identical cooling position of each hot-blast furnace valve
It is connected in series on water inlet manifold, the sum of practical cooling water inflow needed for making its total each hot-blast furnace valve of cooling water inflow, than current
Separate type water supply and water saving nearly 50%.Separation can also be carried out to each hot-blast furnace valve when necessary to supply water.And it is convenient to realize water
Flow the switching between forward flow in hot-blast furnace valve and recoil flowing.But the cooling water of its shortcoming hot-blast furnace valve is
It is connected to the soft water of blast furnace, the cooling water of hot-blast stove can not isolated operation.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to overcome the shortcomings of that the cooling equipment of existing hot-blast furnace valve supplies water, it is cooling to provide hot-blast stove
Water system and control method.The present invention by adding three switch valves and coupled pipeline, make hot-blast furnace valve with
The cooling water of blast-furnace equipment, which can connect together, to be run and with isolated operation, not only guarantees that hot-blast furnace valve makes in maintenance
In the case where cooling water, blast furnace also can be carried out the piping of cooling wall, and can quickly provide punching when blast furnace cooling stave rinses
Scouring water, or even the cooling of hot-blast furnace valve is not influenced during blast furnace staying maintenance.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
The cooling water system of hot-blast stove of the invention, including several hot-blast furnace valves, middle pressure water supply pump group and secondary pressurized
Pump house, it is characterised in that: switch valve I and connecting tube are set on the soft water pipeline of the secondary pressurized pump house output, make secondary add
The soft water pipeline of press pump room output is connected to the middle pressure pipe of therefrom pressure water supply pump group output；Soft water pipe branch after connection into
Enter each valve of the hot-blast stove and tuyere medium jacket of blast furnace, switch valve IV is set at each valve water inlet pipe of hot-blast stove, in blast-furnace tuyere
It covers and switch valve V is set at water inlet pipe；Tee tube, the tee tube are set from the soft water pipeline that each valve of the hot-blast stove exports
Comprising water inlet pipe, outlet pipe and branch pipe, soft water connects drainpipe, the drainpipe followed by water inlet pipe and outlet pipe, branch pipe
On be provided with switch valve III, from drainpipe flow out water import return main；It connects and is arranged on the soft water pipeline of the outlet pipe
There is switch valve II.
As a further improvement of the present invention, soft water pipeline and tuyere medium jacket of blast furnace containing the switch valve II export water
It connects after pipe is in parallel, is then divided into two-way, degassed tank enters devaporizer all the way, and switch is arranged on another way soft water pipeline
Valve VIII is then input to secondary pressurized pump house；The degassing tank is connected with expansion drum, and nitrogen, the degassing are passed through in expansion drum
At least one switch valve is provided on soft water pipeline between tank and devaporizer.
As a further improvement of the present invention, the soft water pipeline and soft water water supply pump group phase of the devaporizer output
Even, the soft water pipeline between the devaporizer and soft water water supply pump group is connected with soft water supplement pipeline, and soft water supplements pipeline
It is connected with soft water supplement feed cistern；Switch valve Ⅸ is set on the soft water supplement pipeline；The branch pipe of the devaporizer connects
Refrigerant pond, refrigerant pond are connected with chilled water water supply pump group, and the water in refrigerant pond is fed evaporation by chilled water water supply pump group
In cooler.
As a further improvement of the present invention, it is characterised in that: set on the soft water pipeline of the soft water water supply pump group output
Switch valve VI is set, three tunnels are then divided into, wherein furnace bottom water cooling tube is connected all the way, all the way by belly pipe, another way and for water ring
By blast furnace cooling stave after pipe connection, every input terminal and output end all the way is provided with switch valve.
As a further improvement of the present invention, three tunnels of the furnace bottom water cooling tube, belly pipe and blast furnace cooling stave output are soft
Waterpipe increases setting switch valve after summarizing, then summarize with the soft water pipeline exported from switch valve VIII into secondary pressing pump
Room.
As a further improvement of the present invention, medium pressure water supply pump group is connected with clean circulating water water cooling pond, the clean circulating water
Water cooling pond and refrigerant pond are arranged side by side；The return main is connected by furnace body high pressure water drainpipe with clean circulating water water cooling pond；
The middle pressure pipe of medium pressure water supply pump group output is divided into two branches, and the soft water pipeline with the output of secondary pressurized pump house connects all the way
Logical, another way is connected to blast furnace advanced stage spray-water by switch valve VII.
The control method of the cooling water system of hot-blast stove of the invention, comprising the following steps:
When hot-blast stove baking oven: being first turned on switch valve I, switch valve IV and switch valve III, be then shut off switch valve II, switch
Valve V and switch valve VII, switch valve VIII and switch valve, restart middle pressure water supply pump group, and medium pressure water supply pump group is from clean circulating water
Industrial water is extracted in water cooling pond, clean circulating water supply each valve of hot-blast stove is cooled down, water after cooling is arranged by return main
Enter into the high pressure water drainpipe of clean circulating water water cooling pond, it is final to import clean circulating water water cooling pond, form one cycle；
When cooling wall rinses: maintenance switch valve I and switch valve IV are in the open state first, maintain switch valve V and switch
Valve VII is in close state；It is then shut off switch valve III and switch valve Ⅸ, then turns on the switch valve II, switch valve VIII and master switch
Valve；Secondly each switch valve of furnace bottom water cooling tube, belly pipe and blast furnace cooling stave upstream end and output end is opened；Then it opens out again
Close valve VI；Water supply pump group is finally pressed in starting；Medium pressure water supply pump group extracts industrial water from clean circulating water water cooling pond, utilizes
Clean circulating water carries out cooling wall flushing, while guaranteeing that each valve of hot-blast stove is cooled down.
As a further improvement of the present invention, it when blast furnace, which comes into operation, to be needed using soft water, under cooling wall flushing state, beats
Open switching valve Ⅸ supplements soft water, after soft water is full of soft water pipeline, turns off the switch valve I and switch valve VIII, then turns on the switch valve
III, start soft water water supply pump group, makes the soft water of supplement after soft water pipeline circulation from the subsequent drainpipe row of each valve of hot-blast stove
Out, until the water of discharge is entirely soft water, valve III and switch valve Ⅸ are finally turned off the switch, blast-furnace soft water is made to enter closed follow
Loop system.
As a further improvement of the present invention, when blast furnace maintenance needs each valve of hot-blast stove to continue to keep cooling, heat is repeated
Operation when wind furnace baker.
As a further improvement of the present invention, the blast furnace soft water closed circulation system is that soft water water supply pump group supplies soft water
It is cooled down to furnace bottom water cooling tube, belly pipe and blast furnace cooling stave, soft water pipeline after cooling enters secondary pressing pump after summarizing
Room, the soft water pipeline exported from secondary pressurized pump house are divided into two-way, supply each valve cooling of hot-blast stove all the way, and another way supplies blast furnace
Tuyere medium sleeve is cooling, and the soft water pipeline after cooling cycle through degassing tank enters devaporizer after summarizing, defeated from devaporizer
Soft water pipeline out is connected with soft water water supply pump group, completes circulation.
3. beneficial effect
Using technical solution provided by the invention, compared with prior art, have the following beneficial effects:
(1) the cooling water system of hot-blast stove of the invention, including several hot-blast furnace valves, middle pressure water supply pump group and secondary add
Press pump room is arranged switch valve I and connecting tube on the soft water pipeline of secondary pressurized pump house output, exports secondary pressurized pump house
Soft water pipeline with therefrom pressure water supply pump group output middle pressure pipe be connected to；Soft water pipeline after connection branches into the hot wind
Each valve of furnace and tuyere medium jacket of blast furnace, are arranged switch valve IV at each valve water inlet pipe of hot-blast stove, at tuyere medium jacket of blast furnace water inlet pipe
Switch valve V is set；Tee tube is set from the soft water pipeline that each valve of the hot-blast stove exports, the tee tube include water inlet pipe,
Outlet pipe and branch pipe, for soft water followed by water inlet pipe and outlet pipe, branch pipe connects drainpipe, is provided with switch on the drainpipe
Valve III, the water flowed out from drainpipe import return main；It connects and is provided with switch valve II on the soft water pipeline of the outlet pipe.This
Invention connect the cooling water of hot-blast furnace valve and blast-furnace equipment can by adding three switch valves and coupled pipeline
It runs together, and can be with isolated operation, in the case where not only guaranteeing that hot-blast furnace valve is using cooling water in maintenance, blast furnace is also
It can be carried out the piping of cooling wall, the time of two wheat harvesting periods increased for the piping of blast furnace cooling stave；And it is rushed in blast furnace cooling stave
Rinse water can be quickly provided when washing；When blast-furnace soft water system debug, hot-blast stove participation or the confession independently of entire soft water system
Water, or even the cooling of hot-blast furnace valve is not influenced during blast furnace staying maintenance；
(2) the cooling water system of hot-blast stove of the invention, medium pressure water supply pump group is connected with clean circulating water water cooling pond, described
Clean circulating water water cooling pond and refrigerant pond are arranged side by side；The return main passes through furnace body high pressure water drainpipe and clean circulating water water cooling pond
It is connected；The middle pressure pipe of medium pressure water supply pump group output is divided into two branches, the soft water exported all the way with secondary pressurized pump house
Pipeline connection, another way are connected to blast furnace advanced stage spray-water by switch valve VII；Invention increases the utilization rates of middle pressure water, both
It is cooling that hot-blast furnace valve can be supplied, and be able to achieve blast furnace advanced stage spray；
(3) control method of the cooling water system of hot-blast stove of the invention, including when hot-blast stove baking oven: it is first turned on switch
Valve I, switch valve IV and switch valve III are then shut off switch valve II, switch valve V and switch valve VII, switch valve VIII and master switch
Valve, restarts middle pressure water supply pump group, and medium pressure water supply pump group extracts industrial water from clean circulating water water cooling pond, clean circulating water is supplied
It is cooled down to each valve of hot-blast stove, water after cooling is drained into the high pressure water drainpipe of clean circulating water water cooling pond by return main
In, it is final to import clean circulating water water cooling pond, form one cycle；Hot-blast stove cooling water system is independently of blast-furnace soft water system in the present invention
System operation saves the time for blast furnace cooling stave piping, the cooling of each valve of hot-blast stove is in addition also ensured that during blast furnace maintenance；
(4) control method of the cooling water system of hot-blast stove of the invention, including when cooling wall flushing: switch is maintained first
Valve I and switch valve IV are in the open state, and switch valve V and switch valve VII is maintained to be in close state；It is then shut off switch valve III
With switch valve Ⅸ, then valve II, switch valve VIII and switch valve are turned on the switch；Secondly furnace bottom water cooling tube, belly pipe and blast furnace are opened
Each switch valve of cooling wall upstream end and output end；Then valve VI is turned on the switch again；Water supply pump group is finally pressed in starting；In described
Pressure water supply pump group extracts industrial water from clean circulating water water cooling pond, carries out cooling wall flushing using clean circulating water, while guaranteeing hot wind
Each valve of furnace is cooled down；The clean circulating water that pressure water supply pump group provides in utilizing in the present invention rinses blast furnace cooling stave faster can be big
It is big to save washing time；
(5) control method of the cooling water system of hot-blast stove of the invention, including when blast furnace come into operation need using soft water when,
It under cooling wall flushing state, turns on the switch valve Ⅸ and supplements soft water, after soft water is full of soft water pipeline, turns off the switch valve I and open
Valve VIII is closed, valve III is then turned on the switch, starts soft water water supply pump group, makes the soft water of supplement after soft water pipeline circulation from hot wind
The subsequent drainpipe discharge of each valve of furnace finally turns off the switch valve III and switch valve Ⅸ until the water of discharge is entirely soft water,
Blast-furnace soft water is set to enter closed-cycle system；Additional soft wa ter system water supplement ability of the invention increases, and the water of soft water pipeline is mended
Full primary, the moisturizing time is by shortening to several hours in several days originally；It can be replaced in the case where not influencing hot-blast stove cooling soft
Water.
(6) control method of the cooling water system of hot-blast stove of the invention, the blast furnace soft water closed circulation system are soft
Soft water is supplied furnace bottom water cooling tube, belly pipe and blast furnace cooling stave and cooled down by water water supply pump group, and soft water pipeline after cooling converges
The General Logistics Department enters secondary pressurized pump house, and the soft water pipeline exported from secondary pressurized pump house is divided into two-way, supplies each valve of hot-blast stove all the way
Cooling, another way supplies that tuyere medium jacket of blast furnace is cooling, and it is cold that the soft water pipeline after cooling cycle through degassing tank enters evaporation after summarizing
But device, the soft water pipeline exported from devaporizer are connected with soft water water supply pump group, complete circulation；Hot-blast stove of the invention is cooling
Water system does not influence the soft water closed circulating system of blast furnace during normal production.
Detailed description of the invention
Fig. 1 is the flow chart of the cooling water system of hot-blast stove and control method.
Label declaration in schematic diagram: 1, switch valve I；2, switch valve II；3, switch valve III；4, switch valve IV；5, it switchs
Valve V；6, switch valve VI；7, switch valve VII；8, switch valve VIII；9, switch valve Ⅸ；10, switch valve.
Specific embodiment
To further appreciate that the contents of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
As shown in Figure 1, the cooling water system of the hot-blast stove of the present embodiment, including several hot-blast furnace valves, middle pressure water supply pump
Group and secondary pressurized pump house, it is characterised in that: switch valve I 1 is set on the soft water pipeline of the secondary pressurized pump house output and is connected
Adapter tube, the soft water pipeline for exporting secondary pressurized pump house are connected to the middle pressure pipe of therefrom pressure water supply pump group output；After connection
Soft water pipeline branches into each valve of the hot-blast stove and tuyere medium jacket of blast furnace, and switch valve is arranged at each valve water inlet pipe of hot-blast stove
IV 4, switch valve V 5 is set at tuyere medium jacket of blast furnace water inlet pipe；It is arranged three from the soft water pipeline that each valve of the hot-blast stove exports
Siphunculus, the tee tube include water inlet pipe, outlet pipe and branch pipe, and soft water is followed by water inlet pipe and outlet pipe, branch pipe connection row
Water pipe is provided with switch valve III 3 on the drainpipe, and the water flowed out from drainpipe imports return main；Connect the outlet pipe
Soft water pipeline on be provided with switch valve II 2.
The connecting tube of switch valve I and switch valve I is DN300 valve and DN300 pipeline in the present embodiment, and switch valve II is
DN250 valve, switch valve III and drainpipe are DN200 valve and DN200 pipeline.
The present embodiment makes hot-blast furnace valve and blast-furnace equipment by adding three switch valves and coupled pipeline
Cooling water, which can connect together, to be run and with isolated operation, not only guarantees that hot-blast furnace valve uses cooling water in maintenance
In the case of, blast furnace also can be carried out the piping of cooling wall, and the time of two wheat harvesting periods is increased for the piping of blast furnace cooling stave；And
Blast furnace cooling stave can quickly provide rinse water when rinsing；When blast-furnace soft water system debug, hot-blast stove participates in or independently of entire
The water supply of soft water system, or even the cooling of hot-blast furnace valve is not influenced during blast furnace staying maintenance.
Embodiment 2
As shown in Figure 1, the present embodiment is substantially the same manner as Example 1, it is preferable that the hose containing the switch valve II 2
It connects after road is in parallel with tuyere medium jacket of blast furnace output water pipe, is then divided into two-way, degassed tank enters devaporizer all the way, separately
Switch valve VIII 8 is set on soft water pipeline all the way, is then input to secondary pressurized pump house；The degassing tank is connected with expansion drum, swollen
It is passed through nitrogen in swell, at least one switch valve is provided on the soft water pipeline between the degassing tank and devaporizer.
Switch valve II is DN250 valve in the present embodiment.
Nitrogen is filled with whether expansion drum detection soft water is full of soft water pipeline in the present embodiment；Degassing tank and devaporizer it
Between the switch valve that is arranged on water return pipeline be used to control the open and close of water flow.
Embodiment 3
As shown in Figure 1, the present embodiment is substantially the same manner as Example 2, it is preferable that the hose of the devaporizer output
Road is connected with soft water water supply pump group, and the soft water pipeline between the devaporizer and soft water water supply pump group and soft water supplement pipeline
It is connected, soft water supplements pipeline and is connected with soft water supplement feed cistern；Switch valve Ⅸ 9 is set on the soft water supplement pipeline；The steaming
The branch pipe for sending out cooler connects refrigerant pond, and refrigerant pond is connected with chilled water water supply pump group, and chilled water water supply pump group is by refrigerant
Water in pond is fed in devaporizer.
Soft water supplement feed cistern provides blast furnace soft water in the present embodiment, and refrigerant pond is cooling for devaporizer.
Embodiment 4
As shown in Figure 1, the present embodiment is substantially the same manner as Example 3, it is preferable that the soft water of the soft water water supply pump group output
Switch valve VI 6 is set on pipeline, is then divided into three tunnels, wherein connecting furnace bottom water cooling tube all the way, passes through belly pipe, another way all the way
By blast furnace cooling stave after being connected to water supply endless tube, every input terminal and output end all the way is provided with switch valve.
The present embodiment can quickly provide rinse water when blast furnace cooling stave rinses.
Embodiment 5
As shown in Figure 1, the present embodiment is substantially the same manner as Example 4, it is preferable that the furnace bottom water cooling tube, belly pipe and height
Furnace cooling wall output three road soft water pipelines summarize after increase setting switch valve 10, then with exported from switch valve VIII 8 it is soft
Waterpipe summarizes into secondary pressurized pump house.
The middle pressure water of middle pressure water supply pump group output can enter each valve of hot-blast stove and be cooled down in the present embodiment, stop in blast furnace
Wind does not influence the cooling water of hot-blast furnace valve during overhauling.
Embodiment 6
As shown in Figure 1, the present embodiment is substantially the same manner as Example 1, it is preferable that medium pressure water supply pump group and clean circulating water are cold
Pond is connected, and the clean circulating water water cooling pond and refrigerant pond are arranged side by side；The return main passes through furnace body high pressure water drainpipe
It is connected with clean circulating water water cooling pond；Medium pressure water supply pump group output middle pressure pipe be divided into two branches, all the way with secondary pressurized
The soft water pipeline connection of pump house output, another way are connected to blast furnace advanced stage spray-water by switch valve VII 7.
The utilization rate that middle pressure water is increased in the present embodiment can supply hot-blast furnace valve cooling and blast furnace evening
Phase spray.
Embodiment 7
As shown in Figure 1, the present embodiment and any embodiment of 1~embodiment of embodiment 6 are essentially identical, it is preferable that including
Following steps:
When hot-blast stove baking oven: be first turned on switch valve I 1, switch valve IV 4 and switch valve III 3, be then shut off switch valve II 2,
Switch valve V 5 and switch valve VII 7, switch valve VIII 8 and switch valve 10 restart middle pressure water supply pump group, medium pressure water supply pump
Group extracts industrial water from clean circulating water water cooling pond, clean circulating water supply each valve of hot-blast stove is cooled down, water after cooling passes through
Return main is drained into the high pressure water drainpipe of clean circulating water water cooling pond, final to import clean circulating water water cooling pond, forms one cycle；
When cooling wall rinses: maintenance switch valve I 1 and switch valve IV 4 are in the open state first, maintain V 5 He of switch valve
Switch valve VII 7 is in close state；It is then shut off switch valve III 3 and switch valve Ⅸ 9, then turns on the switch valve II 2, switch valve VIII 8
With switch valve 10；Secondly each switch valve of furnace bottom water cooling tube, belly pipe and blast furnace cooling stave upstream end and output end is opened；So
Turn on the switch valve VI 6 again afterwards；Water supply pump group is finally pressed in starting；Medium pressure water supply pump group extracts work from clean circulating water water cooling pond
Industry water carries out cooling wall flushing using clean circulating water, while guaranteeing that each valve of hot-blast stove is cooled down.
The connecting tube of switch valve I and switch valve I is DN300 valve and DN300 pipeline in the present embodiment, and switch valve II is
DN250 valve, switch valve III and drainpipe are DN200 valve and DN200 pipeline.
By adding three switch valves and coupled pipeline in the present embodiment, make hot-blast furnace valve and blast-furnace equipment
Cooling water can connect together operation and with isolated operation, not only guarantee that hot-blast furnace valve is using cooling water in maintenance
In the case where, blast furnace also can be carried out the piping of cooling wall, and the time of two wheat harvesting periods is increased for the piping of blast furnace cooling stave；And
Rinse water can be quickly provided when blast furnace cooling stave rinses；When blast-furnace soft water system debug, hot-blast stove participates in or independently of whole
The water supply of a soft water system, or even the cooling of hot-blast furnace valve is not influenced during blast furnace staying maintenance
Embodiment 8
As shown in Figure 1, the present embodiment is substantially the same manner as Example 7, it is preferable that when blast furnace, which comes into operation, to be needed using soft water,
Under cooling wall flushing state, turns on the switch valve Ⅸ 9 and supplement soft water, after soft water is full of soft water pipeline, turn off the switch I 1 He of valve
Switch valve VIII 8, then turns on the switch valve III 3, starts soft water water supply pump group, make the soft water of supplement after soft water pipeline circulation from
The subsequent drainpipe discharge of each valve of hot-blast stove finally turns off the switch valve III 3 and switch until the water of discharge is entirely soft water
Valve Ⅸ 9, makes blast-furnace soft water enter closed-cycle system.
The connecting tube of switch valve I and switch valve I is DN300 valve and DN300 pipeline in the present embodiment, and switch valve II is
DN250 valve, switch valve III and drainpipe are DN200 valve and DN200 pipeline.
The water of soft water pipeline fills once in the present embodiment, and the moisturizing time is by shortening to several hours in several days originally；It can be with
Soft water is replaced in the case where not influencing hot-blast stove cooling.
Embodiment 9
As shown in Figure 1, the present embodiment is substantially the same manner as Example 7, it is preferable that when blast furnace maintenance need each valve of hot-blast stove after
When continuation of insurance holds cooling, operation when hot-blast stove baking oven is repeated.
It can guarantee the cooling water for not influencing hot-blast furnace valve during blast furnace staying maintenance in the present embodiment.
Embodiment 10
As shown in Figure 1, the present embodiment is substantially the same manner as Example 7, it is preferable that the blast furnace soft water closed circulation system is
Soft water is supplied furnace bottom water cooling tube, belly pipe and blast furnace cooling stave and cooled down by soft water water supply pump group, soft water pipeline after cooling
Enter secondary pressing pump room after summarizing, the soft water pipeline exported from secondary pressurized pump house is divided into two-way, and it is each to supply hot-blast stove all the way
Valve is cooling, and another way supplies that tuyere medium jacket of blast furnace is cooling, and the soft water pipeline after cooling cycle through degassing tank enters evaporation after summarizing
Cooler, the soft water pipeline exported from devaporizer are connected with soft water water supply pump group, complete circulation.
The cooling water system of hot-blast stove does not influence the soft water closed circulating system of blast furnace during normal production in the present embodiment.
Embodiment 11
As shown in Figure 1, the present embodiment is substantially the same manner as Example 7, it is preferable that in certain steel mill 3#1080m3Blast furnace construction
In, hot-blast stove is in baker on March 22, and blast furnace June 6, debugging finished, June 11 baker, June 28, tapping, used hot-blast stove
Cooling water system and control method, the time of two wheat harvesting periods is increased for the piping of blast furnace cooling stave；In blast-furnace soft water system
When debugging, hot-blast stove participation or the water supply independently of entire soft water system only need switching valve I, switch valve II and switch valve
III 3 valves；The function of the quick moisturizing of water supply pump group is pressed in utilization, what the water in blast furnace pipeline, equipment was vented completely
In the case of, when pressing the moisturizing of water supply pump group in utilization, the temperature of hot-blast furnace valve maintains 50 DEG C or less.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (10)
1. hot-blast stove cools down water system, including several hot-blast furnace valves, middle pressure water supply pump group and secondary pressurized pump house, feature
It is: switch valve I (1) and connecting tube is set on the soft water pipeline of the secondary pressurized pump house output, keep secondary pressurized pump house defeated
Soft water pipeline out is connected to the middle pressure pipe of therefrom pressure water supply pump group output；Soft water pipeline after connection branches into the heat
Switch valve IV (4) are arranged at each valve water inlet pipe of hot-blast stove in each valve of wind furnace and tuyere medium jacket of blast furnace, tuyere medium jacket of blast furnace water inlet
Switch valve V (5) are set at pipe；Tee tube is set from the soft water pipeline that each valve of the hot-blast stove exports, the tee tube includes
Water inlet pipe, outlet pipe and branch pipe, for soft water followed by water inlet pipe and outlet pipe, branch pipe connects drainpipe, sets on the drainpipe
It is equipped with switch valve III (3), the water flowed out from drainpipe imports return main；It connects and is provided on the soft water pipeline of the outlet pipe
Switch valve II (2).
2. the cooling water system of hot-blast stove according to claim 1, it is characterised in that: contain the switch valve II (2)
It connects after soft water pipeline is in parallel with tuyere medium jacket of blast furnace output water pipe, is then divided into two-way, it is cold to enter evaporation for degassed tank all the way
But device is arranged switch valve VIII (8) on another way soft water pipeline, is then input to secondary pressurized pump house；The degassing tank and expansion
Tank is connected, and nitrogen is passed through in expansion drum, is provided at least one on the soft water pipeline between the degassing tank and devaporizer
Switch valve.
3. the cooling water system of hot-blast stove according to claim 2, it is characterised in that: the devaporizer exports soft
Waterpipe is connected with soft water water supply pump group, and the soft water pipeline between the devaporizer and soft water water supply pump group and soft water supplement
Pipeline is connected, and soft water supplements pipeline and is connected with soft water supplement feed cistern；Switch valve Ⅸ (9) are set on the soft water supplement pipeline；
The branch pipe of the devaporizer connects refrigerant pond, and refrigerant pond is connected with chilled water water supply pump group, chilled water water supply pump group
Water in refrigerant pond is fed in devaporizer.
4. the cooling water system of hot-blast stove according to claim 3, it is characterised in that: the soft water water supply pump group output
Switch valve VI (6) are set on soft water pipeline, are then divided into three tunnels, wherein connecting furnace bottom water cooling tube all the way, pass through belly pipe all the way,
Another way be connected to water supply endless tube after by blast furnace cooling stave, per all the way input terminal and output end be provided with switch valve.
5. the cooling water system of hot-blast stove according to claim 4, it is characterised in that: the furnace bottom water cooling tube, belly pipe
Increase setting switch valve (10) after summarizing with three road soft water pipelines of blast furnace cooling stave output, then and from switch valve VIII (8)
The soft water pipeline of output summarizes into secondary pressurized pump house.
6. the cooling water system of hot-blast stove according to claim 5, it is characterised in that: medium pressure water supply pump group and net ring
Water cooling pond is connected, and the clean circulating water water cooling pond and refrigerant pond are arranged side by side；The return main is arranged by furnace body high pressure water
Water pipe is connected with clean circulating water water cooling pond；Medium pressure water supply pump group output middle pressure pipe be divided into two branches, all the way with it is secondary
The soft water pipeline connection of booster pump chamber output, another way are connected to blast furnace advanced stage spray-water by switch valve VII (7).
7. the control method based on the cooling water system of hot-blast stove as claimed in claim 6, it is characterised in that the following steps are included:
When hot-blast stove baking oven: being first turned on switch valve I (1), switch valve IV (4) and switch valve III (3), be then shut off switch valve II
(2), switch valve V (5) and switch valve VII (7), switch valve VIII (8) and switch valve (10), restart middle pressure water supply pump group, institute
It states pressure water supply pump group and extracts industrial water from clean circulating water water cooling pond, clean circulating water supply each valve of hot-blast stove is cooled down, it is cold
But the water after is drained into the high pressure water drainpipe of clean circulating water water cooling pond by return main, final to import clean circulating water water cooling pond,
Form one cycle；
When cooling wall rinses: maintenance switch valve I (1) and switch valve IV (4) are in the open state first, maintain switch valve V (5)
It is in close state with switch valve VII (7)；Be then shut off switch valve III (3) and switch valve Ⅸ (9), then turn on the switch valve II (2),
Switch valve VIII (8) and switch valve (10)；Secondly furnace bottom water cooling tube, belly pipe and blast furnace cooling stave upstream end and output end are opened
Each switch valve；Then valve VI (6) is turned on the switch again；Water supply pump group is finally pressed in starting；Medium pressure water supply pump group is from net ring
Water cooling extracts industrial water in pond, carries out cooling wall flushing using clean circulating water, while guaranteeing that each valve of hot-blast stove is cooled down.
8. the control method of the cooling water system of hot-blast stove according to claim 7, it is characterised in that: needed when blast furnace comes into operation
When using soft water, under cooling wall flushing state, valve Ⅸ (9) supplement soft water is turned on the switch, after soft water is full of soft water pipeline,
Valve I (1) and switch valve VIII (8) are turned off the switch, valve III (3) is then turned on the switch, starts soft water water supply pump group, makes the soft water of supplement
From the subsequent drainpipe discharge of each valve of hot-blast stove after soft water pipeline circulation, until the water of discharge is entirely soft water, most
After turn off the switch valve III (3) and switch valve Ⅸ (9), so that blast-furnace soft water is entered closed-cycle system.
9. the control method of the cooling water system of hot-blast stove according to claim 7, it is characterised in that: when blast furnace maintenance needs
When each valve of hot-blast stove being wanted to continue to keep cooling, operation when hot-blast stove baking oven is repeated.
10. the control method of the cooling water system of hot-blast stove according to claim 8, it is characterised in that: the blast furnace is soft
The closed-cycle system that water enters is that soft water water supply pump group carries out soft water supply furnace bottom water cooling tube, belly pipe and blast furnace cooling stave
Cooling, soft water pipeline after cooling enters secondary pressing pump room after summarizing, and the soft water pipeline exported from secondary pressurized pump house is divided into
Two-way supplies the soft water pipeline remittance that each valve of hot-blast stove is cooling, and another way supply tuyere medium jacket of blast furnace is cooling, after cooling cycle all the way
The degassed tank of the General Logistics Department enters devaporizer, and the soft water pipeline exported from devaporizer is connected with soft water water supply pump group, completes
Circulation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711495352.9A CN108193009B (en) | 2017-12-31 | 2017-12-31 | The cooling water system of hot-blast stove and control method |
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| CN201711495352.9A CN108193009B (en) | 2017-12-31 | 2017-12-31 | The cooling water system of hot-blast stove and control method |
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| CN108193009B true CN108193009B (en) | 2019-07-30 |
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| CN110923382A (en) * | 2019-11-22 | 2020-03-27 | 上海宝冶集团有限公司 | Flushing method for blast furnace pure water closed circulating water system |
| CN112251558B (en) * | 2020-10-22 | 2022-05-13 | 马鞍山钢铁股份有限公司 | Hot blast valve cooling water system capable of being switched on line |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4831801B1 (en) * | 1970-12-30 | 1973-10-02 | ||
| CN1208079A (en) * | 1997-08-08 | 1999-02-17 | 陈龙勇 | Blast furnace and hot-blast stove water-cooling system with valves |
| CN101864502A (en) * | 2009-12-22 | 2010-10-20 | 中冶南方工程技术有限公司 | Blast furnace soft water closed circulation cooling system |
| CN102321775A (en) * | 2011-09-26 | 2012-01-18 | 中冶南方工程技术有限公司 | Novel combined soft water closed circulation cooling system |
| CN202440524U (en) * | 2012-01-06 | 2012-09-19 | 中冶东方工程技术有限公司 | Improved closed-circulation cooling water system for blast furnace |
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2017
- 2017-12-31 CN CN201711495352.9A patent/CN108193009B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4831801B1 (en) * | 1970-12-30 | 1973-10-02 | ||
| CN1208079A (en) * | 1997-08-08 | 1999-02-17 | 陈龙勇 | Blast furnace and hot-blast stove water-cooling system with valves |
| CN101864502A (en) * | 2009-12-22 | 2010-10-20 | 中冶南方工程技术有限公司 | Blast furnace soft water closed circulation cooling system |
| CN102321775A (en) * | 2011-09-26 | 2012-01-18 | 中冶南方工程技术有限公司 | Novel combined soft water closed circulation cooling system |
| CN202440524U (en) * | 2012-01-06 | 2012-09-19 | 中冶东方工程技术有限公司 | Improved closed-circulation cooling water system for blast furnace |
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