CN108590780A - A kind of TRT units Import Gas pre-heating system and its application method - Google Patents
A kind of TRT units Import Gas pre-heating system and its application method Download PDFInfo
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- CN108590780A CN108590780A CN201810501463.4A CN201810501463A CN108590780A CN 108590780 A CN108590780 A CN 108590780A CN 201810501463 A CN201810501463 A CN 201810501463A CN 108590780 A CN108590780 A CN 108590780A
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- Prior art keywords
- gas
- heat
- valve
- heat exchange
- exchange mechanisms
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
- F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/10—Heating, e.g. warming-up before starting
Abstract
A kind of TRT units Import Gas pre-heating system of present invention offer and its application method, gas preheating system include：One end of heat exchange mechanisms is connect with purified gas inlet duct one end, and the other end of the heat exchange mechanisms is connect with one end of purified gas outlet conduit；One end of heat receiver structure is connect with heat smoke inlet tube, and the other end is connect by pipeline with air-introduced machine, and is connected by more heat conducting pipes of setting between heat receiver structure and heat exchange mechanisms；Bypass gas piping is arranged in the side of heat exchange mechanisms；The both ends of bypass gas piping are connect with purified gas inlet duct and purified gas outlet conduit respectively, and are respectively arranged with autocontrol valve at the two-port on bypass gas piping.The heat transfer efficiency of the system of the present invention is high, and device structure is compact, and small, good energy-conserving effect is damaged in fluid flowing resistance, and operating flexibility does not influence the adjusting of blast furnace top pressure.The application method of gas preheating system in the present invention is simple to operation.
Description
Technical field
The invention belongs to technical field of smelting, one kind for being related to blast furnace ironmaking field is energy saving, operability is strong, can be improved
The device of TRT unit Import Gas temperature, and in particular to a kind of TRT units Import Gas pre-heating system and its application method.
Background technology
Blast furnace is generally equipped with TRT systems (blast-furnace top gas recovery turbine generating set), TRT-- (Blast at present
Furnace Top Gas Recovery Turbine Unit, hereinafter referred to as TRT) blast-furnace top gas recovery turbine generator
(TRT) be using blast furnace process byproduct -- the pressure energy and thermal energy that top gas has make coal gas pass through turbine swollen
Swollen machine acting, is translated into mechanical energy, then convert mechanical energy to electric energy.
The number of TRT generated energy is influenced by gas flow, gas pressure and gas temperature, by certain blast furnace 2015-
Data in 2017 carry out analysis and find that TRT unit inlets gas temperature is maximum to the generating influence of TRT, presses at furnace roof (coal gas)
In the case of power, gas flow variation less, TRT unit Import Gas temperature often promotes 1 DEG C, and TRT unit daily generations just increase
Add 400 degree, but be limited by the requirement of furnace charge, the working of a furnace and furnace top equipment, blast furnace roof (coal gas) temperature is per day is less than 135 for this
DEG C, the maximum temperature of TRT unit designs is 200 DEG C.
Accordingly, it is desirable to provide a kind of improved technology scheme insufficient for the above-mentioned prior art.
Invention content
The defect deficiency that the purpose of the present invention is overcome the above-mentioned power generations of TRT in the prior art amount efficiency low, proposes a kind of TRT
Unit Import Gas pre-heating system.The present invention is to improve TRT generated energy, and the preheating is installed additional on TRT unit inlet gas pipings
System achievees the purpose that improve gas temperature.
To achieve the goals above, the present invention provides the following technical solutions：
A kind of TRT units Import Gas pre-heating system, the gas preheating system include：
One end of heat exchange mechanisms, the heat exchange mechanisms is connect with purified gas inlet duct one end, the heat exchange mechanisms it is another
One end is connect with one end of purified gas outlet conduit, and the coal of the other end of the purified gas outlet conduit and the TRT units
Gas input end connects, for the purified gas after heat exchange mechanisms preheat to be input in the TRT units；And the heat exchanger
Structure both ends are connected respectively with the port of the purified gas inlet duct and the purified gas outlet conduit by autocontrol valve
It connects；
One end of heat receiver structure, the heat receiver structure is connect with heat smoke inlet tube, and the other end of the heat receiver structure is logical
Piping is connect with air-introduced machine, and is connected by more heat conducting pipes of setting between the heat receiver structure and the heat exchange mechanisms,
It can smoothly be circulated inside heat exchange mechanisms to entering the purified gas inside heat exchange mechanisms convenient for the medium in heat conducting pipe
Realize pre- hot function；
Gas piping is bypassed, the bypass gas piping is arranged in the side of the heat exchange mechanisms, convenient for being changed without described
The coal gas of heat engine structure preheating directly enters to the bypass gas piping from purified gas inlet duct and is delivered to the purified gas again
In outlet conduit and then it is delivered in the TRT units；It is described bypass gas piping both ends respectively with the purified gas entrance
Pipeline is connected with the purified gas outlet conduit, and is respectively arranged with automatic control at the two-port on the bypass gas piping
Valve processed.
TRT unit Import Gas pre-heating systems as described above, it is preferable that go out in the purified gas inlet duct and purified gas
Thermocouple is respectively provided on mouth pipeline, the thermocouple is used to measure the temperature of coal gas in pipeline.
TRT unit Import Gas pre-heating systems as described above, it is preferable that set in the at one end of the purified gas outlet conduit
Residual oxygen analytical instrument is equipped with, and the residual oxygen analytical instrument installation position is close to the heat exchange mechanisms, for detecting the coal gas in pipeline
Whether oxygen is contained.
TRT unit Import Gas pre-heating systems as described above, it is preferable that the autocontrol valve is by blank-plate valve and butterfly valve group
At；Preferably, the autocontrol valve of the heat exchange mechanisms both ends setting is respectively that the first autocontrol valve and second automatically control
Valve；First autocontrol valve is made of the first blank-plate valve and first butterfly valve successively, and the first blank-plate valve setting is located proximate to
The purified gas inlet duct；Second autocontrol valve is made of the second blank-plate valve and second butterfly valve successively, the second butterfly valve
What is be arranged is located proximate to the purified gas outlet conduit；Preferably, it is respectively set at the two-port on the bypass gas piping
Autocontrol valve be respectively third autocontrol valve and the 4th autocontrol valve；Third autocontrol valve is successively by third blind plate
Valve and third butterfly valve composition, the third blank-plate valve setting are located proximate to the purified gas inlet duct；4th automatically controls
Valve is made of the 4th blank-plate valve and the 4th butterfly valve successively, and the 4th butterfly valve setting is located proximate to the purified gas outlet
Road；Preferably, all autocontrol valves are controlled by the remote operating system of outside setting.
TRT unit Import Gas pre-heating systems as described above, it is preferable that the heat exchange mechanisms include：
Heat exchanger body, the heat exchanger body are a cartridge type shell, and the enclosure interior is provided with more heat pipes,
And more heat pipes are connect by the heat conducting pipe of hull outside with heat receiver structure；
Safety valve, the safety valve are arranged on the outer surface of the upper end of the heat exchanger body, and safety valve is for exchanging heat
Device ontology plays pressure release when internal pressure is exceeded, so that it is guaranteed that heat exchanger body operational safety；
Diffusion valve, the diffusion valve are arranged on the outer surface of the upper end of the heat exchanger body, are used for heat exchanger body
When maintenance purging diffuse, pressure release；
Sediment pot, the sediment pot is arranged in the lower end of the heat exchanger body, micro contained by coal gas for depositing
Dust；
Nitrogen purge valve, the nitrogen purge valve are arranged on the outer surface of the sediment pot, in heat exchanger body
When maintenance, nitrogen purge valve purges remaining coal gas in heat exchanger body.
TRT unit Import Gas pre-heating systems as described above, it is preferable that the heat exchanger body is the cylinder of a steel construction
Shell body is zone of heat liberation in a cartridge type enclosure interior side, and the other side is cold fluid pass；Preferably, in the sediment
The surface of tank is additionally provided with inspection manhole, for observing the working condition in sediment pot.
TRT unit Import Gas pre-heating systems as described above, it is preferable that the heat smoke is the useless of hot blast stove burning generation
Gas.
A kind of application method of any one of them TRT units Import Gas pre-heating system as above, the application method packet
Include following steps：
Step 1, preparation：Confirm whether air-introduced machine voltage, each transmission portion are normal；Confirm on bypass gas piping
Third autocontrol valve and the 4th autocontrol valve, the nitrogen purge valve in heat exchange mechanisms and diffusion valve be in off-position；Really
The first autocontrol valve and the second autocontrol valve recognized in heat exchange mechanisms are in open position；Confirm heat exchanger body without it is damaged,
It is air tight；
Step 2 starts heat exchange mechanisms work：Start air-introduced machine, external heat smoke be sucked into heat-drawer mechanism,
It is entered inside heat exchanger body by heat conducting pipe again, so that flue gas is smoothly circulated inside heat exchange mechanisms to change entering
The in-house purified gas of heat realizes pre- hot function, while needing to observe the pressure and traffic conditions of heat-drawer ontology；
Step 3 stops operation：Close air-introduced machine；Maintenance behaviour is carried out to TRT unit Import Gas pre-heating systems, in order
Open the third autocontrol valve and the 4th autocontrol valve on bypass gas piping；Close the first automatic control in heat exchange mechanisms
Valve processed and the second autocontrol valve；It opens nitrogen purge valve and diffusion valve, heat exchanging device body interior is purged.
The application method of TRT unit Import Gas pre-heating systems as described above, it is preferable that further include：Entered by purified gas
The temperature of thermocouple measurement Import Gas on mouth pipeline, when gas temperature is less than 160 DEG C and when holding time more than 1h, coal
Gas pre-heating system can start the first autocontrol valve and the second autocontrol valve on air-introduced machine and heat exchange mechanisms automatically, and close
The third autocontrol valve and the 4th autocontrol valve on gas piping are bypassed, gas preheating system worked well is made.
The application method of TRT unit Import Gas pre-heating systems as described above, it is preferable that further include：In gas preheating system
In the course of work of uniting, the gas temperature after being preheated by heat exchange mechanisms is higher than 180 DEG C and when being maintained for more than 1h, gas preheating system
System can be automatically stopped air-introduced machine and work and open the third autocontrol valve and the 4th autocontrol valve on bypass gas piping；Together
When purified gas outlet conduit on thermocouple control and enter gas temperature in TRT units and stablize at 160-170 DEG C, prevent coal
Gas excessively preheats, and avoids generating energy waste.
Compared with the immediate prior art, technical solution provided by the invention has following excellent effect：
1) heat transfer efficiency of gas preheating system of the invention is high, and device structure is compact, and small, energy saving effect is damaged in fluid flowing resistance
Fruit is good, operating flexibility, does not influence the adjusting of blast furnace top pressure, and gas preheating system can pass through thermoelectricity on purified gas inlet duct
The even gas temperature that measures is generated useless to control the open and close of operation autocontrol valve and air-introduced machine using hot blast stove burning
Gas is preheated to entering the coal gas in TRT units, is reached raising and is stablized TRT unit Import Gas temperature, realizes and improve TRT
The daily generation of unit.
2) autocontrol valve of the invention can realize that remote control, the degree of automation are higher.
3) can directly using the hot blast stove burning mating with blast furnace when the exhaust gas that is discharged as heat source, good energy-conserving effect, in advance
Thermal effect is notable, and economic benefit is apparent.
4) purified gas outlet conduit of the invention outlet is equipped with residual oxygen analytical instrument, can effectively prevent because hot in heat exchanger
Pipe is damaged, causes exhaust leak (oxygen-containing in exhaust gas), effectively plays the role of early warning.
5) present invention can effectively prevent the production of TRT turbines vanes by improving and stablizing TRT unit Import Gas temperature
Raw chlorion crystalline solid fouling.
Description of the drawings
Fig. 1 is TRT unit Import Gas pre-heating system schematic diagrames in the specific embodiment of the invention.
Fig. 2 is the structural schematic diagram of single heat pipe in the specific embodiment of the invention.
In figure：1- heat conducting pipes；2- air-introduced machines；3- heat receiver structures；4- heat smoke inlet tubes；5- purified gas inlet ducts；6-
First blank-plate valve；7- first butterfly valves；8- heat exchange mechanisms；9- nitrogen purge valves；10- sediment pots；11- inspection manholes；12- thirds are blind
Plate valve；13- third butterfly valves；14- bypasses gas piping；15- safety valves；The 4th butterfly valves of 16-；The 4th blank-plate valve of 17-；18- clean coals
Gas outlet conduit；The second blank-plate valve of 19-；20- second butterfly valves；21-TRT units；22- thermocouples；23- thermocouples；24- is diffused
Valve；25- residual oxygen analytical instruments；26- is heated fin；27- medium fluids.
Specific implementation mode
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
The every other embodiment that logical technical staff is obtained, shall fall within the protection scope of the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.It should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the present invention can be combined with each other.
In the description of the present invention, the orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings,
It is merely for convenience of the description present invention rather than requires the present invention must be with specific azimuth configuration and operation, therefore cannot understand
For limitation of the present invention.The term " connected " that is used in the present invention, " connection " shall be understood in a broad sense, for example, it may be fixed
Connection, may be a detachable connection；It can be directly connected, can also be indirectly connected by intermediate member, for this field
Those of ordinary skill for, can understand the concrete meaning of above-mentioned term as the case may be.
As shown in Figure 1, the specific embodiment of the invention provides a kind of TRT units Import Gas pre-heating system, coal of the invention
The heat transfer efficiency of gas pre-heating system is high, and device structure is compact, and small, good energy-conserving effect is damaged in fluid flowing resistance, and operating flexibility does not influence
(furnace roof herein refers to blast furnace roof, because the system of the present invention does not generate resistance to original gaspipe network for the adjusting of furnace top pressure
Power, so not influencing the adjusting of blast furnace top pressure), gas preheating system can pass through thermocouple 22 on purified gas inlet duct 5
Gas temperature is measured to control the open and close of operation autocontrol valve and air-introduced machine 2, the exhaust gas generated using hot blast stove burning
It is preheated to entering the coal gas in TRT units 21, reach raising and stablizes 21 Import Gas temperature of TRT units, realized and improve
The purpose of the daily generation of TRT units 21.
Gas preheating system provided by the invention includes：
One end of heat exchange mechanisms 8, heat exchange mechanisms 8 is connect with 5 one end of purified gas inlet duct, the other end of heat exchange mechanisms 8
It is connect with one end of purified gas outlet conduit 18, and the gas inlet of the other end of purified gas outlet conduit 18 and TRT units 21
End connection, for the purified gas after the preheating of heat exchange mechanisms 8 to be input in TRT units 21；And 8 both ends of heat exchange mechanisms are
It is connect respectively with the port of purified gas inlet duct 5 and purified gas outlet conduit 18 by autocontrol valve.
One end of heat receiver structure 3, heat receiver structure 3 is connect with heat smoke inlet tube 4, and the other end of heat receiver structure 3 passes through pipe
Road is connect with air-introduced machine 2, and is connected by more heat conducting pipes 1 of setting between heat receiver structure 3 and heat exchange mechanisms 8, in heat conducting pipe 1
Heat transfer medium absorb heat from heat smoke and be sent to heat exchange mechanisms 8, carried out with the purified gas for entering inside heat exchange mechanisms 8 hot
It exchanges, to be preheated to entering the purified gas inside heat exchange mechanisms 8.In the present invention, the effect of heat receiver structure 3 is easy for
Heat exchanger tube carries out heat exchange with exhaust gas, this is because purified gas cannot be directly heated with heat smoke, direct pre-heat effect is bad,
Then the present invention is provided with the heat receiver structure 3.
Gas piping 14 is bypassed, bypass gas piping 14 is arranged in the side of heat exchange mechanisms 8, convenient for without heat exchange mechanisms 8
The coal gas of preheating directly enters to bypass gas piping 14 from purified gas inlet duct 5 and is delivered to again in purified gas outlet conduit 18
And then it is delivered in TRT units 21；Bypass gas piping 14 both ends respectively with purified gas inlet duct 5 and purified gas outlet
Road 18 connects, and is respectively arranged with autocontrol valve at the two-port on bypass gas piping 14.
In a specific embodiment of the present invention, it is respectively set on purified gas inlet duct 5 and purified gas outlet conduit 18
It is equipped with thermocouple 22,23, thermocouple 22,23 is used to measure the temperature of purified gas in pipeline.The one of purified gas outlet conduit 18
Residual oxygen analytical instrument 25 is provided at end, and 25 installation position of residual oxygen analytical instrument enters for detecting in pipeline close to heat exchange mechanisms 8
Coal gas whether contain oxygen, i.e., residual oxygen analytical instrument 25 is installed in the close entrance of purified gas outlet conduit 18, can be effective
Identification the phenomenon that exhaust leak (oxygen-containing in exhaust gas), can effectively play early warning caused by heat pipe breakage in heat exchanger body and carry
It is shown as using, specifically proves that heat pipe is damaged in heat exchanger body when residual oxygen analytical instrument 25 detects oxygen, should stop immediately
Warm operation is overhauled, and can effectively avoid the generation of production accident, while playing the role of early warning.
In a specific embodiment of the present invention, autocontrol valve is made of blank-plate valve and butterfly valve, according to fluid traffic direction,
Butterfly valve is set to before blank-plate valve.Blank-plate valve is used for cutting off coal gas when being for general on overhaul of the equipments in the present invention；Butterfly
Valve is convenient for the switch of blank-plate valve for reducing blank-plate valve blind plate pressure at two ends.It is set according to fluid traffic direction butterfly valve in the present invention
The reason of being placed in before blank-plate valve makes blank-plate valve blind plate medium inlet end pressure become smaller primarily to reduce pipeline pressure, this
Resistance suffered by sample blind plate valve events is smaller.
Preferably, the autocontrol valve of 8 both ends of heat exchange mechanisms setting is respectively the first autocontrol valve and the second automatic control
Valve processed；First autocontrol valve is made of the first blank-plate valve 6 and first butterfly valve 7 successively；Second autocontrol valve is successively by second
Blank-plate valve 19 and second butterfly valve 20 form.More preferably, the automatic control being respectively set at the two-port on gas piping 14 is bypassed
Valve processed is respectively third autocontrol valve and the 4th autocontrol valve；Third autocontrol valve is successively by third blank-plate valve 12 and
Three butterfly valves 13 form；4th autocontrol valve is made of the 4th blank-plate valve 17 and the 4th butterfly valve 16 successively.It is further preferred that institute
There is autocontrol valve to be controlled by the remote operating system of outside setting.
In a specific embodiment of the present invention, it is further preferred that heat smoke is the exhaust gas that hot blast stove burning generates, i.e., originally
In invention can directly using the hot blast stove burning mating with blast furnace when the exhaust gas that is discharged as heat source, good energy-conserving effect, pre- thermal effect
Fruit is notable, takes conveniently and flow is big, can meet live actual requirement, without using the new energy, on the other hand reach energy
The purpose that source recycles is, it can be achieved that clean manufacturing, economic benefit are apparent.
In a specific embodiment of the present invention, heat receiver structure 3 includes：Heat-drawer ontology is set to heat-drawer body interior
The second heat exchanger tube；Wherein heat-drawer ontology is hollow structure, is equipped with heat smoke entrance and cold flue gas exports, so that heat-drawer sheet
Body surrounds flue gas Circulation Area, and heat smoke entrance is connect with heat smoke inlet tube 4, and cold flue gas outlet is connect with air-introduced machine；Second changes
The cold fluid outlet of heat pipe import and heat exchange mechanisms is connected or is connect with external cold fluid to receive cold fluid, the second heat exchange
Pipe outlet is connect by heat conducting pipe 1 with the hot fluid outlet ports of heat exchange mechanisms.In application, open air-introduced machine, make heat smoke (such as with height
The exhaust gas being discharged when the mating hot blast stove burning of stove) through heat smoke inlet tube 4 enter heat-drawer ontology；Cold fluid flow is changed by second
Heat pipe import enters heat exchanger tube, carries out heat exchange with the heat smoke flowed outside the second heat exchanger tube, after heat exchange, cold fluid becomes hot-fluid
Body is simultaneously discharged by the second heat transfer tube outlet, and temperature is reduced and extracted out by air-introduced machine after heat smoke release heat.
In a specific embodiment of the present invention, heat exchange mechanisms 8 include：Heat exchanger body, heat exchanger body are a cartridge type
Shell is provided with the first heat exchanger tube, and the heat conducting pipe 1 and heat receiver structure 3 that the first heat exchanger tube passes through hull outside inside housings
Connection.The purified gas entrance of heat exchanger body is connect by the first autocontrol valve with purified gas inlet duct 5, purified gas outlet
It is connect with purified gas outlet conduit 18 by the second autocontrol valve, purified gas Circulation Area is formed in heat exchanger body；First
Heat exchanger tube is set in purified gas Circulation Area, and the first heat exchanger tube import is connect with heat receiver structure 3 to receive hot-fluid through heat conducting pipe 1
Body, the first heat transfer tube outlet is for being discharged cold fluid.In application, purified gas enters clean coal by the purified gas entrance of heat exchanger body
In gas Circulation Area；After hot fluid flows through heat conducting pipe 1, the first heat exchanger tube is entered by the first heat exchanger tube import, with flowing outside heat pipe
Purified gas carries out heat exchange, and after heat exchange, hot fluid becomes cold fluid and is discharged by the first heat transfer tube outlet, clean coal aspiration heat
Temperature is increased and is exported by the purified gas of heat exchanger body and flowed out afterwards.Heat exchange mechanisms 8 further include：Safety valve 15, safety valve 15 are set
It sets on the outer surface of the upper end of heat exchanger body, pressure release work from safety valve is used for heat exchanger body when internal pressure is exceeded
With so that it is guaranteed that heat exchanger body operational safety；The outer surface in the upper end of heat exchanger body is arranged in diffusion valve 24, diffusion valve 24
On, when being overhauled for heat exchanger body purging diffuse, pressure release；Sediment pot 10, sediment pot 10 are arranged in the lower end of heat exchanger body
Portion, for precipitating micro dust contained in purified gas；The appearance in sediment pot 10 is arranged in nitrogen purge valve 9, nitrogen purge valve 9
On face, when for heat exchanger body maintenance, remaining coal gas in heat exchanger body is purged.
Preferably, it is additionally provided with inspection manhole 11 on the surface of sediment pot 10, for observing the work feelings in sediment pot 10
Condition.
It is further preferred that the first heat exchanger tube includes more heat pipes, every heat pipe is relatively independent closed cells, into one
Step, ratio-frequency welding fin is installed outside more heat pipes being arranged inside heat exchanger body additional, to make heat transfer efficiency height.Such as Fig. 2 institutes
It is shown as the structural schematic diagram of single heat pipe in the present invention, the multiple heated fins 26 that are circumferentially provided with along the outer surface of heat pipe (pass
Thermal efficiency higher), and medium fluid 27 is set in the inside of heat pipe.Heat pipe is a kind of quilt that heat conductivility is high in the present invention
Dynamic heat transfer element, heat pipe are conducive to the effect of Transformation Principle and capillary so that the heat transference efficiency of itself is high；Inside heat pipe
Medium fluid 27 is the medium that heat is transmitted；The wicking structure being arranged in heat pipe wall has imbibition effect, is generated by wicking structure
Capillary force so that condensed fluid is returned to evaporation ends from condensation end.Because after being evacuated inside heat exchanger tube, before sealing again
Injected media fluid 27 determines so the pressure inside heat exchanger tube is steam pressure after being evaporated by working fluid.As long as plus
Hot tube surface, medium fluid will evaporate.The temperature and pressure of evaporation ends steam is all slightly higher than other positions of heat pipe, because
This, produces pressure difference in heat pipe, promote colder one end in steam flow heat pipe.When steam condenses on the heat pipe walls
It waits, steam releases the latent heat of vaporization, to which heat has been transmitted to condensation end.Later, the wicking structure of heat pipe makes condensed liquid return again
To evaporation ends, as long as there is heat source heating, this process can recycle progress.
Heat exchange mechanisms 8 provided by the invention are exchanged heat using gravity assisted heat pipe technology, it is with Thermal conductivity
Heat pipe as heat transfer element, heat transfer efficiency is high, and device structure is compact, and fluid flowing resistance damage is small.The work of the heat exchange mechanisms 8 has
Body refers to：Many single heat pipes are set inside heat exchanger body, are first pumped into certain negative pressure in closed heat pipe, in this case
It is filled with a small amount of distilled water, heat pipe absorbs heat after heat receiver structure 3, is vaporized after the distilled water heat absorption in heat pipe, small
Pressure difference under, the distilled water after vaporization enters in heat exchanger body, coal to be preheated in heat pipe outer surface and heat exchanger body
After gas contact, the distilled water heat release vaporized in heat pipe preheats coal gas, and the distilled water of vaporization is liquefied as steaming again because of heat release
Distilled water flows back into heat receiver structure 3, in heat pipe distilled water so cycle coal gas is preheated, heat pipe quantity number depend on
The size of heat exchange amount often takes the method for adding fin outside heat pipe to improve the coefficient of heat transfer of gas, can make so required
The heat pipe number wanted greatly reduces.Heat pipe passes through heat receiver structure 3 in the present invention, means in practical applications, positioned at changing
The first heat exchanger tube inside heat engine structure 8, the second heat exchanger tube inside heat receiver structure 3 and connection heat exchange mechanisms 8 and receipts heat
The heat conducting pipe of mechanism 3 can be same heat pipe, and constitute a closed circulation, and every heat pipe is one independent closed
The circulatory system.
In order to be effectively prevented dew point corrosion, by adjusting the heat pipe radical or adjustment heat pipe of the setting of heat exchanger body inside
The heat transfer area of cold and hot side makes heat pipe wall temperature be increased to dew-point temperature or more.
In order to effectively prevent dust stratification, heat exchanger body design that variable section structure can be used, ensure the streams such as fluid inlet and outlet
Speed flowing, achievees the purpose that from deashing.
In addition, the structure of gas preheating system to facilitate the understanding of the present invention, specific embodiments of the present invention also provide
A kind of application method of 21 Import Gas pre-heating system of TRT units, application method include the following steps：
Step 1, preparation：Confirm whether 2 voltage of air-introduced machine, each transmission portion are normal；Confirm bypass gas piping 14
On third autocontrol valve and nitrogen purge valve 9 on the 4th autocontrol valve, heat exchange mechanisms 8 and diffusion valve 24 be in pass
Position；Confirm that the first autocontrol valve and the second autocontrol valve in heat exchange mechanisms 8 are in open position；Confirm heat exchanger body without
It is damaged, air tight；
Step 2 starts heat exchange mechanisms 8 and works：Start air-introduced machine 2, external heat smoke be sucked into heat receiver structure 3,
The heat transfer medium (fluid) flowed through in the second heat exchanger tube is heated, the heat transfer medium heated (fluid) is entered by heat conducting pipe 1 again
To inside heat exchanger body, to realize pre- hot function to entering the purified gas inside heat exchange mechanisms 8；Step 3 stops operation：
Close air-introduced machine 2；
Inspection operation is carried out to 21 Import Gas pre-heating system of TRT units, is opened in order on bypass gas piping 14
Third autocontrol valve and the 4th autocontrol valve；The first autocontrol valve and second closed in heat exchange mechanisms 8 automatically controls
Valve；It opens nitrogen purge valve 9 and diffusion valve 24, heat exchanging device body interior is purged.In the present invention, gas preheating system
It has to carry out shutdown operation when shutting down and not necessarily overhaul, but overhauling the system, includes mainly as follows in maintenance
Overhauling project：Check the valve on preheater internal pipeline, cleaning preheater internal incrustation, replacement preheater tank body or pipeline
Deng.
It additionally includes：The temperature that Import Gas is measured by the thermocouple 23 on purified gas inlet duct 5, when coal gas temperature
When degree is less than 160 DEG C and when holding time more than 1h, gas preheating system can automatically start on air-introduced machine 2 and heat exchange mechanisms 8
First autocontrol valve and the second autocontrol valve, and close third autocontrol valve and four selfs on bypass gas piping 14
Dynamic control valve, makes gas preheating system worked well.
In gas preheating system work process, when the gas temperature after the preheating of heat exchange mechanisms 8 higher than 180 DEG C and is tieed up
When holding more than 1h, gas preheating system can be automatically stopped the work of air-introduced machine 2 and the third opened on bypass gas piping 14 is automatic
The first autocontrol valve and the second autocontrol valve on control valve and the 4th autocontrol valve, closing heat exchange mechanisms 8；Case simultaneously
Thermocouple 22 on body (purified gas outlet conduit 18) is monitored to entering the gas temperature in TRT units 21；So control
It into the gas temperature in TRT units 21 and stablizes at 160-170 DEG C, prevent coal gas from excessively preheating, avoid generating energy waste.
In conclusion the present invention has the following technical effect that：
1) heat transfer efficiency of gas preheating system of the invention is high, and device structure is compact, and small, energy saving effect is damaged in fluid flowing resistance
Fruit is good, operating flexibility, does not influence the adjusting of blast furnace top pressure, and gas preheating system can be by hot on purified gas inlet duct 5
Galvanic couple 22 measures gas temperature to control the open and close of operation autocontrol valve and air-introduced machine 2, is generated using hot blast stove burning
Exhaust gas preheated to entering the coal gas in TRT units 21, reach raising and stablize 21 Import Gas temperature of TRT units, it is real
Now improve the daily generation of TRT units 21.
2) the hot and cold side of the heat pipe in the present invention in heat exchanger body can use ratio-frequency welding fin reinforcing to pass as needed
Heat makes up general gas-low weakness of the gas heat exchanger coefficient of heat transfer.
It can be effectively prevented from the crossfire of cold and hot fluid, every heat pipe is all relatively independent closed cells, complete equipment,
No-rotary part, reliable for operation, operation is easy to maintenance.
It can be effectively prevented dew point corrosion, by adjusting heat pipe radical or the heat transfer area ratio of adjustment heat pipe cold hot side, made
Heat pipe wall temperature is increased to dew-point temperature or more.
It can effectively prevent dust stratification, design of heat exchanger that variable section structure can be used, ensure the flowing of fluid inlet and outlet uniform flow,
Achieve the purpose that from deashing.
The damage of single heat pipe does not influence other heat pipes, while the influence to overall heat exchange effect also can be neglected.
3) gas preheating system provided by the invention is consumed without any rotatable parts without additional power, need not be frequent
It replaces element and nor affects on normal production even if there is subelement damage.
4) good energy-conserving effect, can directly using the hot blast stove burning mating with blast furnace when the exhaust gas that is discharged as heat source, take
It is big with convenient and flow, live actual requirement can be met, without using the new energy, it is sharp again that energy saving another aspect has reached the energy
Purpose is, it can be achieved that clean manufacturing.
5) operating flexibility does not influence the adjusting of furnace top pressure, can be at any time according to the needs of TRT units 21 and blast furnace operating
The gas preheating system (stopping or start exhaust gas air-introduced machine 2) is deactivated and started, because being mounted with by-pass line, is being changed
When hot systems failure need to deactivate, turn on the gas-fire by-pass line, does not influence the adjusting of furnace top pressure.
6) significant effect, daily generation rise 10000kw.h or more, 21 Import Gas pre-heating system of TRT units input
Use, blast furnace day gas temperature be increased to 160-170 DEG C, 21 daily generation of TRT units can be improved 10000kw.h or more, year wound
About 2,000,000 yuan/year are imitated, wherein large blast furnace benefit is more considerable.
7) improving 21 service life of TRT units can be effective by improving and stablizing 21 Import Gas temperature of TRT units
Prevent 21 blade of TRT units generate chlorion crystalline solid fouling.
8) autocontrol valve of the invention can realize that remote control, the degree of automation are higher.
9) purified gas outlet conduit 18 of the invention outlet is equipped with residual oxygen analytical instrument 25, can effectively prevent because of heat exchanger
Interior heat pipe is damaged, causes exhaust leak (oxygen-containing in exhaust gas), effectively plays the role of early warning.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God and principle within, any modification, equivalent replacement, improvement and so on, accompanying claims protection domain of the present invention it
It is interior.
Claims (10)
1. a kind of TRT units Import Gas pre-heating system, which is characterized in that the gas preheating system includes：
One end of heat exchange mechanisms, the heat exchange mechanisms is connect with purified gas inlet duct one end, the other end of the heat exchange mechanisms
Connect with one end of purified gas outlet conduit, and the coal gas of the other end of the purified gas outlet conduit and the TRT units into
Mouth end connection, for the purified gas after heat exchange mechanisms preheat to be input in the TRT units；And the heat exchange mechanisms two
End is connect respectively with the port of the purified gas inlet duct and the purified gas outlet conduit by autocontrol valve；
One end of heat receiver structure, the heat receiver structure is connect with heat smoke inlet tube, and the other end of the heat receiver structure passes through pipe
Road is connect with air-introduced machine, and is connected by more heat conducting pipes of setting between the heat receiver structure and the heat exchange mechanisms, is convenient for
Medium in heat conducting pipe can smoothly circulate to realize to entering the purified gas inside heat exchange mechanisms inside heat exchange mechanisms
Pre- hot function；
Gas piping is bypassed, the bypass gas piping is arranged in the side of the heat exchange mechanisms, convenient for without the heat exchanger
The coal gas of structure preheating directly enters to the bypass gas piping from purified gas inlet duct and is delivered to the purified gas outlet again
In pipeline and then it is delivered in the TRT units；It is described bypass gas piping both ends respectively with the purified gas inlet duct
It is connected with the purified gas outlet conduit, and is respectively arranged with and automatically controls at the two-port on the bypass gas piping
Valve.
2. TRT units Import Gas pre-heating system as described in claim 1, which is characterized in that in the purified gas inlet tube
Thermocouple is respectively provided on road and purified gas outlet conduit, the thermocouple is used to measure the temperature of coal gas in pipeline.
3. TRT units Import Gas pre-heating system as claimed in claim 1 or 2, which is characterized in that exported in the purified gas
The at one end of pipeline is provided with residual oxygen analytical instrument, and the residual oxygen analytical instrument installation position is close to the heat exchange mechanisms, for examining
Whether the coal gas in test tube road contains oxygen.
4. TRT units Import Gas pre-heating system as described in claim 1, which is characterized in that the autocontrol valve is by blind
Plate valve and butterfly valve composition；
Preferably, the autocontrol valve of the heat exchange mechanisms both ends setting is respectively that the first autocontrol valve and second automatically control
Valve；First autocontrol valve is made of the first blank-plate valve and first butterfly valve successively, and the first blank-plate valve setting is located proximate to
The purified gas inlet duct；Second autocontrol valve is made of the second blank-plate valve and second butterfly valve successively, the second butterfly valve
What is be arranged is located proximate to the purified gas outlet conduit；
Preferably, the autocontrol valve being respectively set at the two-port on the bypass gas piping is respectively that third automatically controls
Valve and the 4th autocontrol valve；Third autocontrol valve is made of third blank-plate valve and third butterfly valve successively, the third blind plate
Valve setting is located proximate to the purified gas inlet duct；4th autocontrol valve is successively by the 4th blank-plate valve and the 4th butterfly valve group
At the 4th butterfly valve setting is located proximate to the purified gas outlet conduit；
Preferably, all autocontrol valves are controlled by the remote operating system of outside setting.
5. TRT units Import Gas pre-heating system as described in claim 1, which is characterized in that the heat exchange mechanisms include：
Heat exchanger body, the heat exchanger body are a cartridge type shell, the enclosure interior are provided with more heat pipes, and more
Root heat pipe is connect by the heat conducting pipe of hull outside with heat receiver structure；
Safety valve, the safety valve are arranged on the outer surface of the upper end of the heat exchanger body, and safety valve is used for heat exchanger sheet
Body plays pressure release when internal pressure is exceeded, so that it is guaranteed that heat exchanger body operational safety；
Diffusion valve, the diffusion valve are arranged on the outer surface of the upper end of the heat exchanger body, are overhauled for heat exchanger body
When purging diffuse, pressure release；
Sediment pot, the sediment pot is arranged in the lower end of the heat exchanger body, for depositing the micro dust contained by coal gas；
Nitrogen purge valve, the nitrogen purge valve are arranged on the outer surface of the sediment pot, for being overhauled in heat exchanger body
When, nitrogen purge valve purges remaining coal gas in heat exchanger body.
6. TRT units Import Gas pre-heating system as claimed in claim 5, which is characterized in that
The heat exchanger body is the cartridge type shell of a steel construction, is zone of heat liberation in a cartridge type enclosure interior side, separately
Side is cold fluid pass；
Preferably, it is additionally provided with inspection manhole on the surface of the sediment pot, for observing the working condition in sediment pot.
7. TRT units Import Gas pre-heating system as described in claim 1, which is characterized in that the heat smoke is hot-blast stove
Burn the exhaust gas that stove generates.
8. a kind of application method of such as claim 1-7 any one of them TRT unit Import Gas pre-heating systems, feature exist
In the application method includes the following steps：
Step 1, preparation：Confirm whether air-introduced machine voltage, each transmission portion are normal；Confirm the on bypass gas piping
Three autocontrol valves and the 4th autocontrol valve, the nitrogen purge valve in heat exchange mechanisms and diffusion valve are in off-position；Confirmation is changed
The first autocontrol valve and the second autocontrol valve on heat engine structure are in open position；Confirm heat exchanger body without it is damaged, do not leak
Gas；
Step 2 starts heat exchange mechanisms work：Start air-introduced machine, external heat smoke is sucked into heat-drawer mechanism, then is led to
It crosses heat conducting pipe to enter inside heat exchanger body, so that flue gas is smoothly circulated inside heat exchange mechanisms to entering heat exchanger
Purified gas inside structure realizes pre- hot function, while needing to observe the pressure and traffic conditions of heat-drawer ontology；
Step 3 stops operation：Close air-introduced machine；Maintenance behaviour is carried out to TRT unit Import Gas pre-heating systems, is opened in order
Bypass the third autocontrol valve and the 4th autocontrol valve on gas piping；Close the first autocontrol valve in heat exchange mechanisms
With the second autocontrol valve；It opens nitrogen purge valve and diffusion valve, heat exchanging device body interior is purged.
9. the application method of TRT units Import Gas pre-heating system as claimed in claim 8, which is characterized in that further include：
By the temperature of the thermocouple measurement Import Gas on purified gas inlet duct, when gas temperature is less than 160 DEG C and dimension
When holding the time and being more than 1h, gas preheating system can start the first autocontrol valve and second on air-introduced machine and heat exchange mechanisms automatically
Autocontrol valve, and third autocontrol valve and the 4th autocontrol valve on bypass gas piping are closed, make gas preheating system
System normal work.
10. the application method of TRT units Import Gas pre-heating system as claimed in claim 9, which is characterized in that further include：
In gas preheating system work process, the gas temperature after being preheated by heat exchange mechanisms higher than 180 DEG C and remains super
When crossing 1h, gas preheating system can be automatically stopped air-introduced machine work and open bypass gas piping on third autocontrol valve and
4th autocontrol valve；The thermocouple on purified gas outlet conduit controls the gas temperature entered in TRT units and stablizes simultaneously
It at 160-170 DEG C, prevents coal gas from excessively preheating, avoids generating energy waste.
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| CN201810501463.4A CN108590780A (en) | 2018-05-23 | 2018-05-23 | A kind of TRT units Import Gas pre-heating system and its application method |
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| CN201810501463.4A CN108590780A (en) | 2018-05-23 | 2018-05-23 | A kind of TRT units Import Gas pre-heating system and its application method |
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| CN85108099A (en) * | 1985-11-03 | 1987-05-13 | 马鞍山钢铁公司 | The method and apparatus that the blast-furnace hot-air furnace flue gas exhaust heat utilizes |
| CN2095345U (en) * | 1991-01-17 | 1992-02-05 | 张家口冶金制氧机备件厂 | Gas preheater |
| CN202595161U (en) * | 2009-09-04 | 2012-12-12 | 保尔伍斯股份有限公司 | Blast furnace top gas recovery system |
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| CN103939932A (en) * | 2014-04-28 | 2014-07-23 | 中冶华天工程技术有限公司 | Blast furnace gas boiler flue gas waste heat deep recycling system |
| WO2015079760A1 (en) * | 2013-11-28 | 2015-06-04 | 新日鉄住金エンジニアリング株式会社 | Gas temperature adjustment method for blast furnace gas dry dust collection equipment and blast furnace gas dry dust collection equipment |
| CN208236465U (en) * | 2018-05-23 | 2018-12-14 | 湖北新冶钢特种钢管有限公司 | A kind of TRT unit Import Gas pre-heating system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108099A (en) * | 1985-11-03 | 1987-05-13 | 马鞍山钢铁公司 | The method and apparatus that the blast-furnace hot-air furnace flue gas exhaust heat utilizes |
| CN2095345U (en) * | 1991-01-17 | 1992-02-05 | 张家口冶金制氧机备件厂 | Gas preheater |
| CN202595161U (en) * | 2009-09-04 | 2012-12-12 | 保尔伍斯股份有限公司 | Blast furnace top gas recovery system |
| WO2015079760A1 (en) * | 2013-11-28 | 2015-06-04 | 新日鉄住金エンジニアリング株式会社 | Gas temperature adjustment method for blast furnace gas dry dust collection equipment and blast furnace gas dry dust collection equipment |
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Address after: 435001 Huangshi Road, Hubei, Huangshi, No. 316 Applicant after: Daye Special Steel Co., Ltd Address before: 435001 Huangshi Road, Hubei, Huangshi, No. 316 Applicant before: Hubei Xinyegang Special Steel Tube Co., Ltd. |