CN110511770A - A kind of raw coke oven gas heat recovery heat exchanger tedge and its control method - Google Patents
A kind of raw coke oven gas heat recovery heat exchanger tedge and its control method Download PDFInfo
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- CN110511770A CN110511770A CN201910916370.2A CN201910916370A CN110511770A CN 110511770 A CN110511770 A CN 110511770A CN 201910916370 A CN201910916370 A CN 201910916370A CN 110511770 A CN110511770 A CN 110511770A
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- heat
- transferring medium
- coke oven
- heat exchanger
- heat transferring
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- 239000000571 coke Substances 0.000 title claims abstract description 163
- 238000011084 recovery Methods 0.000 title claims abstract description 141
- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000008676 import Effects 0.000 claims abstract description 80
- 239000003245 coal Substances 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 138
- 238000001704 evaporation Methods 0.000 claims description 22
- 230000008020 evaporation Effects 0.000 claims description 22
- 230000008859 change Effects 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 17
- 239000002918 waste heat Substances 0.000 claims description 14
- 238000005303 weighing Methods 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000009834 vaporization Methods 0.000 claims description 6
- 230000008016 vaporization Effects 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000004064 recycling Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000012530 fluid Substances 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 238000000197 pyrolysis Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B27/00—Arrangements for withdrawal of the distillation gases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B41/00—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
- C10B41/08—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke for the withdrawal of the distillation gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The present invention relates to a kind of raw coke oven gas heat recovery heat exchanger tedge and its control methods, the tedge includes heat recovery heat exchanger tedge (1), around being equipped with heat transferring medium pipe on heat recovery heat exchanger tedge (1) tube wall, the heat transferring medium pipe includes heat exchange cold medium import (2) and heat exchange cold medium outlet (3), and heat exchange cold medium import balanced valve (12) is provided at the heat exchange cold medium import (2).The present invention can adapt to raw coke oven gas quantum of output and fire falls curvilinear motion operating condition, the constant of flow is controlled by the pressure difference of heat recovery heat exchanger tedge heat transferring medium import, i.e. big in coal oven dithio-gas quantum of output, when heat exchange amount is big, heat transferring medium inlet outlet pressure differential be will increase, it will cause the increase of heat transferring medium resistance drop, tedge flow is set to generate decreasing trend, which is exactly that pressure difference is unidirectionally adjusted, and increases inlet area, resistance is reduced, it is constant to stablize tedge flow；Vice versa.
Description
Technical field
The present invention relates to a kind of raw coke oven gas heat recovery heat exchanger tedge and its control methods, are mainly used for coke oven famine coal
The recycling of gas waste heat, belongs to technical field of heat exchangers.
Background technique
Waste heat of coke oven crude gas recycling tedge is being promoted or the relatively broad coal oven dithio-gas that is applied to
Waste heat recycling.Coke oven has multiple destructive distillation rooms (burner hearth) to form side by side, and each burner hearth has one or two tedge to go out destructive distillation
The raw coke oven gas come is sent to bridge tube, after rapid cooling, then raw coke oven gas is sent into gas collecting tube.Waste heat of coke oven crude gas recycles tedge just
It is by the tedge of original filling with insulation material, replacement becomes waste heat of coke oven crude gas and recycles tedge, is listed in furnace roof and simultaneously
It is coupled to gas collecting tube.Coke oven production is batch production, is required in each oven coke production process by adding (dress) coal, heating dry
It evaporates, ripe coke, several production processes such as coke pushing, the coke of each furnace production will add (dress) coal, heating destructive distillation, ripe coke, coke pushing
Etc. the temperature curve for forming a fire in several production processes and falling temperature change, that is, the raw coke oven gas output during dry distillation of coal
The real-time change of amount and component, also results in the variation of the heat exchange amount of raw coke oven gas heat recovery heat exchanger tedge, and then cause
Raw coke oven gas heat recovery heat exchanger tedge causes the recycling heat exchange of raw coke oven gas waste heat in the variation of intraductal heat exchange medium rate of gasification
Device tedge heat transferring medium real-time pressure drop variation, in turn result in raw coke oven gas heat recovery heat exchanger tedge arranged side by side into
The variation of water flow, that is heat exchange amount increases when raw coke oven gas quantum of output is big, takes in heat recovery heat exchanger tedge
Heat increases pressure rise, and at this moment heat exchanger should be that inflow increasing is more advantageous to waste heat recycling, and actual conditions are in parallel
Other heat recovery heat exchanger tedges occur actual conditions be in heat recovery heat exchanger tedge heat transferring medium pass in and out
Mouthful pressure difference increases, and at this moment heat exchanger should measure to reduce into water (or other heat transferring mediums), caused by after actual conditions are parallel connection
Other reduce heat recoveries tedges just will increase water flow.The raw coke oven gas waste heat recycling for thus causing multiple groups in parallel is changed
The bias current of the water (or other hot working fluids) of hot device tedge heat transferring medium, reduces waste heat recovery efficiency.
It currently, is mostly to use a string sequence parallel connection heat recovery heat exchanger tedge export pipeline for one according to production string sequence
Group, the method that then parallel connection intervenes outlet header again；Also with good grounds production string sequence is using a string sequence parallel connection waste heat recycling heat exchange
Device tedge export pipeline is one group of technical solution being adjusted using regulating valve；Have again in heat recovery heat exchanger tedge
Inlet and outlet install orifice plate additional and carry out current limliting, form water (or other hot working fluids) stabilization of heat transferring medium.
It is inclined essentially without the water (or other hot working fluids) for solving heat transferring medium using method in parallel according to production string sequence
Flow problem；There is the actual conditions of the unusable inorganization flame in scene, i.e. actual conditions not to allow for the scheme of regulating valve
Addition uses regulating valve；It is asked using orifice plate current limliting also without substantive water (or other hot working fluids) bias current for solving heat transferring medium
Topic.
In addition, not allowing burner hearth to intake in the life cycle of coke oven production process, burner hearth will cause burner hearth once intaking
Damage, causes extreme loss, also brings hidden danger to safety in production.
It is current solve control heat recovery heat exchanger to rise tube leakage in the method in burner hearth to be used in the double-deck tedge
Wall construction, to increase safety factor, the high temperature corrosion that this method will result in collet metal after inner cylinder damage is destroyed, practical
Method is procrastinateed in a upper only failure, does not solve root problem；There are also the instrument controls of monitoring tedge outlet raw gas temperature
Method, this method are not allow for actual condition existing for instrument line as scene, and there is also critical defects.
Summary of the invention
The technical problem to be solved by the present invention is to for the above-mentioned prior art provide flow distribution in a kind of pipe it is balanced and
Once leak (or other hot working fluids) can cut off the water supply in time (or other hot working fluids) raw coke oven gas heat recovery heat exchanger rise
Pipe and its control method.
The present invention solves the above problems used technical solution are as follows: a kind of raw coke oven gas heat recovery heat exchanger tedge,
It includes heat recovery heat exchanger tedge, the heat recovery heat exchanger rise on tube wall around be equipped with heat transferring medium pipe (or
Other forms device, such as thermal jacket), the heat transferring medium pipe includes that heat transferring medium import and heat transferring medium export, described to change
Heat transferring medium import balanced valve is connected at thermal medium inlet, the heat transferring medium import balanced valve includes balance valve piston
Formula spool, balanced valve piston valve core two sides are respectively arranged with balanced valve import and balancing valve outlet, and the balanced valve goes out
Mouth is connected with heat transferring medium import, and the balanced valve import connect access heat transferring medium, the balance valve piston with Outer Tube
Formula spool lower end is connected with first piston chamber, and heat transferring medium import impulse ozzle is provided on the first piston chamber, described flat
Weighing apparatus valve piston formula spool upper end is connected with the third plunger shaft and the 4th plunger shaft being connected in series in turn, sets in the third plunger shaft
It is equipped with heat transferring medium outlet impulse ozzle, raw coke oven gas outlet impulse ozzle is provided in the 4th plunger shaft, the heat exchange is situated between
Matter pipe is being respectively arranged with heat transferring medium entrance impulse mouth and heat exchange close to heat transferring medium import and heat transferring medium exit position
Media outlet impulse mouth, the heat recovery heat exchanger tedge are being provided with raw coke oven gas outlet impulse at upper end position
Mouthful, heat transferring medium entrance impulse is connected between the heat transferring medium entrance impulse mouth and heat transferring medium import impulse ozzle
Pipe is connected with heat transferring medium outlet impulse between the heat transferring medium outlet impulse mouth and heat transferring medium outlet impulse ozzle
Pipe is connected with raw coke oven gas outlet pressure guiding pipe between the raw coke oven gas outlet impulse mouth and raw coke oven gas outlet impulse ozzle.
Further, it has been arranged in series second piston chamber below the first piston chamber, has been set on the second piston chamber
It is equipped with raw coke oven gas entrance impulse ozzle, the heat recovery heat exchanger tedge is provided with raw coke oven gas at close lower end position and enters
Mouth impulse mouth, is connected with raw coke oven gas entrance impulse between the raw coke oven gas entrance impulse mouth and raw coke oven gas entrance impulse ozzle
Pipe.
Further, the heat transferring medium exit is provided with the check valve installed in the same direction with heat transferring medium.
Further, balancing spring is provided in the third plunger shaft.
Further, down big up small horn mouth is provided on the balanced valve piston valve core.
A kind of control method of raw coke oven gas heat recovery heat exchanger tedge, the control method the following steps are included:
Initial flow is set, heat transferring medium entrance impulse mouth is using heat transferring medium entrance pressure guiding pipe connection access first piston
Heat transferring medium import impulse ozzle on chamber is P1 in the intracavitary formation pressure of first piston that it is communicated；At this moment balance is acted on
The pressure of valve piston formula spool lower end surface is P1；
Heat transferring medium outlet impulse mouth is gone out using the heat transferring medium in heat transferring medium outlet pressure guiding pipe access third plunger shaft
Mouthful impulse ozzle, third plunger shaft are provided with balancing spring, heat transferring medium outlet pressure+balancing spring pressure and be P3；It is waste
The 4th piston that gas exit impulse mouth is unidirectionally connected in series using raw coke oven gas outlet pressure guiding pipe connection access with third plunger shaft
Raw coke oven gas on chamber exports impulse ozzle, communicates at it and forms pressure in the 4th plunger shaft as P4；At this moment it is living to act on balanced valve
The pressure of plug spool upper surface is P3+P4；
So that the opening size of piston hole when P1=P3+P4 is identical as setting value, i.e. the setting of initial flow is to meet
The feedwater flow of heat recovery heat exchanger tedge heat transfer requirements and the suitable ratio value of evaporation capacity, at this time balanced valve piston type
The aperture of spool aperture is after initial set value, the operation of heat recovery heat exchanger tedge can be realized；
When raw coke oven gas quantum of output variation in coke oven operational process and the heat exchange evaporation capacity variation of heat recovery heat exchanger tedge
Increase when being increased based on heat, the pressure formed in heat recovery heat exchanger tedge will change, cause to exchange heat cold medium into
Mouth exports the imbalance of pressure intracavitary in balanced valve piston valve core pressure at two ends with heat exchange cold medium, so that P1 > P3+P4, at this time
Balanced valve piston valve core moves up, and balanced valve piston valve core moves up proportion expression and increases heat transferring medium import balance
The aperture of valve increases the flow of heat transferring medium, and heat recovery heat exchanger tedge needs to increase heat transferring medium supply at this time
To realize that exchanging the thermal efficiency for maximizes, and realizes heat transferring medium flow optimal control；
Conversely, when raw coke oven gas quantum of output variation in coke oven operational process and heat recovery heat exchanger tedge heat exchange evaporation capacity
When variation is reduced based on heat reduction, the pressure formed in heat recovery heat exchanger tedge will change, and lead to cold Jie that exchanges heat
Matter import and heat exchange cold medium export the imbalance of pressure intracavitary in balanced valve piston valve core pressure at two ends, so that P1 < P3+P4,
Balanced valve piston valve core moves down, and balanced valve piston valve core moves down proportion expression and reduces heat transferring medium import balance
The aperture of valve reduces the flow of heat transferring medium, and heat recovery heat exchanger tedge needs to reduce heat transferring medium supply at this time
Maximum heat exchange efficiency is taken to realize, also achieves heat transferring medium flow optimal control.
When raw coke oven gas quantum of output variation in coke oven operational process and the heat exchange evaporation capacity variation of heat recovery heat exchanger tedge
Increase when being increased based on heat, the pressure formed in heat recovery heat exchanger tedge will change, cause to exchange heat cold medium into
Mouth exports the imbalance of pressure intracavitary in balanced valve piston valve core pressure at two ends with heat exchange cold medium, so that P1+P2 > P3+P4,
Balanced valve piston valve core moves up at this time, balanced valve piston valve core move up proportion expression increase heat exchange cold medium into
The aperture of mouth balanced valve, increases the flow of heat transferring medium, heat recovery heat exchanger tedge needs to increase heat transferring medium at this time
Supply is to realize that exchanging the thermal efficiency for maximizes, and realizes heat transferring medium flow optimal control；
Conversely, when raw coke oven gas quantum of output variation in coke oven operational process and heat recovery heat exchanger tedge heat exchange evaporation capacity
When variation is reduced based on heat reduction, the pressure formed in heat recovery heat exchanger tedge will change, and lead to cold Jie that exchanges heat
Matter import and heat exchange cold medium export the imbalance of pressure intracavitary in balanced valve piston valve core pressure at two ends, so that P1+P2 < P3+
P4, balanced valve piston valve core move down, balanced valve piston valve core move down proportion expression reduce heat exchange cold medium into
The aperture of mouth balanced valve, reduces the flow of heat transferring medium, heat recovery heat exchanger tedge needs to reduce heat transferring medium at this time
Supply takes maximum heat exchange efficiency to realize, realizes heat transferring medium flow optimal control.
Further, heat recovery heat exchanger tedge is flowed into when leakage in heat recovery heat exchanger tedge occurs
The heat transferring medium meeting instant vaporization of interior raw coke oven gas, causes the pressure of P4 increased dramatically, so that P1 < < P3+P4, balances valve piston
It is irrecoverable that formula spool is quickly moved downward to dead point, and heat transferring medium import balanced valve is closed, and cuts off heat recovery heat exchanger
The entrance of heat transferring medium in tedge；Since heat recovery heat exchanger tedge heat transferring medium exports the check valve being equipped with, automatically
Cutting heat transferring medium exit medium inversely flows into heat recovery heat exchanger tedge, avoids heat transferring medium a large amount of to realize
Flow into the control of coke oven.
A kind of control method of raw coke oven gas heat recovery heat exchanger tedge, the control method the following steps are included:
Initial flow is set, heat transferring medium entrance impulse mouth is using heat transferring medium entrance pressure guiding pipe connection access first piston
Heat transferring medium import impulse ozzle on chamber is P1 in the intracavitary formation pressure of first piston that it is communicated；Raw coke oven gas entrance impulse
Mouth accesses the raw coke oven gas on the second piston chamber being unidirectionally connected in series with first piston chamber using the connection of raw coke oven gas entrance pressure guiding pipe
Entrance impulse ozzle is P2 in the intracavitary formation pressure of second piston that it is communicated；At this moment it acts under balanced valve piston valve core
The pressure of end face is P1+P2；
Heat transferring medium outlet impulse mouth is gone out using the heat transferring medium in heat transferring medium outlet pressure guiding pipe access third plunger shaft
Mouthful impulse ozzle, third plunger shaft are provided with balancing spring, heat transferring medium outlet pressure+balancing spring pressure and be P3；It is waste
The 4th piston that gas exit impulse mouth is unidirectionally connected in series using raw coke oven gas outlet pressure guiding pipe connection access with third plunger shaft
Raw coke oven gas on chamber exports impulse ozzle, communicates at it and forms pressure in the 4th plunger shaft as P4；At this moment it is living to act on balanced valve
The pressure of plug spool upper surface is P3+P4；
So that the opening size of piston hole when P1+P2=P3+P4 is identical as setting value, i.e. the setting of initial flow is full
The feedwater flow of sufficient heat recovery heat exchanger tedge heat transfer requirements and the suitable ratio value of evaporation capacity, balance valve piston at this time
The aperture of formula spool aperture is after initial set value, the operation of heat recovery heat exchanger tedge can be realized；
When raw coke oven gas quantum of output variation in coke oven operational process and the heat exchange evaporation capacity variation of heat recovery heat exchanger tedge
Increase when being increased based on heat, the pressure formed in heat recovery heat exchanger tedge will change, cause to exchange heat cold medium into
Mouth exports the imbalance of pressure intracavitary in balanced valve piston valve core pressure at two ends with heat exchange cold medium, so that P1+P2 > P3+P4,
Balanced valve piston valve core moves up at this time, and balanced valve piston valve core moves up proportion expression and increases heat transferring medium import
The aperture of balanced valve increases the flow of heat transferring medium, and heat recovery heat exchanger tedge needs to increase heat transferring medium confession at this time
It should measure to realize that exchanging the thermal efficiency for maximizes, and realizes heat transferring medium flow optimal control；
Conversely, when raw coke oven gas quantum of output variation in coke oven operational process and heat recovery heat exchanger tedge heat exchange evaporation capacity
When variation is reduced based on heat reduction, the pressure formed in heat recovery heat exchanger tedge will change, and lead to cold Jie that exchanges heat
Matter import and heat exchange cold medium export the imbalance of pressure intracavitary in balanced valve piston valve core pressure at two ends, so that P1+P2 < P3+
P4, balanced valve piston valve core move down, and balanced valve piston valve core moves down proportion expression and reduces heat transferring medium import
The aperture of balanced valve reduces the flow of heat transferring medium, and heat recovery heat exchanger tedge needs to reduce heat transferring medium confession at this time
It should measure to realize and take maximum heat exchange efficiency, also achieve heat transferring medium flow optimal control.
Further, heat recovery heat exchanger tedge is flowed into when leakage in heat recovery heat exchanger tedge occurs
The heat transferring medium meeting instant vaporization of interior raw coke oven gas, causes the pressure difference of P2 and P4 increased dramatically, so that P1+P2 < < P3+P4, balance
It is irrecoverable that valve piston formula spool is quickly moved downward to dead point, closes heat exchange cold medium import balanced valve, cuts off more than raw coke oven gas
The entrance of heat recovering heat exchanger tedge heat transferring medium, since heat recovery heat exchanger tedge heat transferring medium exports the list being equipped with
To valve, the reverse inflow heat recovery heat exchanger tedge of heat transferring medium outlet medium is automatically cut off, realization avoids heat transferring medium
It is a large amount of to flow into coke oven control.
Compared with the prior art, the advantages of the present invention are as follows:
1, the present invention can adapt to raw coke oven gas quantum of output and fire falls curvilinear motion operating condition, be risen by heat recovery heat exchanger
Constant or required, i.e., big in coal oven dithio-gas quantum of output, the heat exchange amount of the pressure difference Reverse Turning Control flow of pipe heat transferring medium inlet and outlet
When big, heat transferring medium inlet outlet pressure differential be will increase, and will cause the increase of heat transferring medium resistance drop, tedge flow is made to generate drop
Low tendency, the balanced valve are exactly that pressure difference is reversely adjusted, increase inlet area, reduce resistance drop, stablize tedge flow it is constant or
Increase flow to adjust, improves heat exchange efficiency；Vice versa；
2, the present invention, once tedge heat exchanger failure causes interior leakage, will cause tedge in tedge operational process
The pressure difference in interior raw coke oven gas channel increases (or gas passage outlet port pressure increases in tedge), the pressure difference of increase or pressure meeting
So that valve cutting is risen continuing to flow into for heat exchange of heat pipe heat transferring medium, stop the tedge and continue to run, plays protection coke oven
Effect.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of raw coke oven gas heat recovery heat exchanger tedge embodiment 1 of the present invention.
Fig. 2 is a kind of schematic diagram of raw coke oven gas heat recovery heat exchanger tedge embodiment 2 of the present invention.
Wherein:
Heat recovery heat exchanger tedge 1
Heat transferring medium import 2
Heat transferring medium outlet 3
Heat transferring medium entrance impulse mouth 4
Heat transferring medium entrance pressure guiding pipe 5
Heat transferring medium exports impulse mouth 6
Heat transferring medium exports pressure guiding pipe 7
Raw coke oven gas entrance impulse mouth 8
Raw coke oven gas entrance pressure guiding pipe 9
Raw coke oven gas exports impulse mouth 10
Raw coke oven gas exports pressure guiding pipe 11
Heat transferring medium import balanced valve 12
Balanced valve import 12-1
Balancing valve outlet 12-2
Balanced valve piston valve core 12-3
Heat transferring medium import impulse ozzle 12-4
First piston chamber 12-5
Second piston chamber 12-6
Raw coke oven gas entrance impulse ozzle 12-7
Heat transferring medium exports impulse ozzle 12-8
Third plunger shaft 12-9
Balancing spring 12-10
4th plunger shaft 12-11
Raw coke oven gas exports impulse ozzle 12-12
Check valve 13.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
Embodiment 1: balanced valve is cut off using heat recovery heat exchanger ascending tube crude-gas inlet outlet pressure differential
Referring to Fig. 1, a kind of raw coke oven gas heat recovery heat exchanger tedge of the present invention, it includes waste heat recycling heat exchange
Device tedge 1, around being equipped with heat transferring medium pipe (or other forms device, such as heat on 1 tube wall of heat recovery heat exchanger tedge
Collet etc.), the heat transferring medium pipe includes heat transferring medium import 2 and heat transferring medium outlet 3, is connected at the heat transferring medium import 2
It connects and is provided with heat transferring medium import balanced valve 12, the heat transferring medium import balanced valve 12 includes balanced valve piston valve core 12-
3, the two sides balanced valve piston valve core 12-3 are respectively arranged with balanced valve import 12-1 and balancing valve outlet 12-2, described flat
Weighing apparatus valve outlet 12-2 is connected with heat transferring medium import 2, and the balanced valve import 12-1 connect access heat transferring medium with Outer Tube,
The lower end balanced valve piston valve core 12-3 is connected with the first piston chamber 12-5 being connected in series and second piston chamber 12-6 in turn,
It is provided with heat transferring medium import impulse ozzle 12-4 on the first piston chamber 12-5, is provided on the second piston chamber 12-6
Raw coke oven gas entrance impulse ozzle 12-7, the upper end balanced valve piston valve core 12-3 are connected with the third piston being connected in series in turn
Balancing spring 12-10, the third piston are provided in chamber 12-9 and the 4th plunger shaft 12-11, the third plunger shaft 12-9
It is provided on chamber 12-9 on heat transferring medium outlet impulse ozzle 12-8, the 4th plunger shaft 12-11 and is provided with raw coke oven gas outlet
Impulse ozzle 12-12, the heat transferring medium pipe are respectively set at 3 positions of heat transferring medium import 2 and heat transferring medium outlet
There are heat transferring medium entrance impulse mouth 4 and heat transferring medium outlet impulse mouth 6, the heat recovery heat exchanger tedge 1 is close to upper
Raw coke oven gas outlet impulse mouth 10 and raw coke oven gas entrance impulse mouth 8, the heat transferring medium entrance are respectively arranged at lower end positions
Heat transferring medium entrance pressure guiding pipe 5 is connected between impulse mouth 4 and heat transferring medium import impulse ozzle 12-4, the heat exchange is situated between
Heat transferring medium outlet pressure guiding pipe 7 is connected between matter outlet impulse mouth 6 and heat transferring medium outlet impulse ozzle 12-8, it is described
Raw coke oven gas outlet pressure guiding pipe 11 is connected between raw coke oven gas outlet impulse mouth 10 and raw coke oven gas outlet impulse ozzle 12-12,
Raw coke oven gas entrance pressure guiding pipe 9 is connected between the raw coke oven gas entrance impulse mouth 8 and raw coke oven gas entrance impulse ozzle 12-7；
It is provided with the check valve 13 installed in the same direction with heat transferring medium at the heat transferring medium outlet 3, is avoided on stopping this
When riser continues to run, there are also heat transferring mediums inversely to flow into coke oven.
The essence of raw coke oven gas heat recovery heat exchanger tedge binary automatic protection is by heat transferring medium import balanced valve
12 are adjusted protection, and adjusting protection philosophy is heat transferring medium import balanced valve 12 for raw coke oven gas heat recovery heat exchanger
The adjusting of the heat transferring medium flow of tedge 1 controls, and specific control method is as follows:
Initial flow is set, heat transferring medium entrance impulse mouth 4 is living using the connection of heat transferring medium entrance pressure guiding pipe 5 access first
The heat transferring medium import impulse ozzle 12-4 on chamber 12-5 is filled in, it is P1 that pressure is formed in the first piston chamber 12-5 that it is communicated；
Raw coke oven gas entrance impulse mouth 8 is unidirectionally connected in series using the connection access of raw coke oven gas entrance pressure guiding pipe 9 with first piston chamber 12-5
Raw coke oven gas entrance impulse ozzle 12-7 on second piston chamber 12-6, forming pressure in the second piston chamber 12-6 that it is communicated is
P2；At this moment the pressure for acting on the lower end surface balanced valve piston valve core 12-3 is P1+P2；
Heat transferring medium exports the heat exchange that impulse mouth 6 is accessed using heat transferring medium outlet pressure guiding pipe 7 on third plunger shaft 12-9
Media outlet impulse ozzle 12-8, third plunger shaft 12-9 are provided with balancing spring 12-10, heat transferring medium outlet pressure+balance
The pressure of spring 12-10 and be P3；Raw coke oven gas exports impulse mouth 10 using the raw coke oven gas outlet connection of pressure guiding pipe 11 access and third
Raw coke oven gas on the 4th plunger shaft 12-11 that plunger shaft 12-9 is unidirectionally connected in series exports impulse ozzle 12-12, communicates the at it
It is P4 that pressure is formed in four plunger shaft 12-11 (P4 is usually normal pressure or micro-positive pressure under normal operation)；At this moment it acts on flat
The pressure of the weighing apparatus upper surface valve piston formula spool 12-3 is P3+P4；
So that the opening size of piston hole when P1+P2=P3+P4 is identical as setting value, that is to say, that initial flow
Setting is the suitable ratio value for meeting the feedwater flow and evaporation capacity of 1 heat transfer requirements of heat recovery heat exchanger tedge, at this time
The aperture of balanced valve piston valve core 12-3 aperture is after initial set value, the operation of heat recovery heat exchanger tedge 1 can
To realize.
When raw coke oven gas quantum of output variation in coke oven operational process and the heat exchange evaporation capacity variation of heat recovery heat exchanger tedge 1
Increase when being increased based on heat, the pressure formed in heat recovery heat exchanger tedge 1 will change, cause to exchange heat cold medium into
Mouth 2 exports 3 imbalance of pressure intracavitary in balanced valve piston valve core 12-3 pressure at two ends with heat exchange cold medium, so that P1+P2 >
P3+P4, balanced valve piston valve core 12-3 is moved up at this time, is provided with down big up small loudspeaker on balanced valve piston valve core 12-3
Mouth, balanced valve piston valve core 12-3 move up proportion expression and increase the aperture of heat transferring medium import balanced valve 12, increase
The flow of heat transferring medium, heat recovery heat exchanger tedge 1 needs to increase heat transferring medium supply and to realize exchanges heat at this time
Efficiency maximizes, so, realize heat transferring medium flow optimal control；
Conversely, when raw coke oven gas quantum of output variation in coke oven operational process and the heat exchange evaporation of heat recovery heat exchanger tedge 1
When amount variation is reduced based on heat reduction, the pressure formed in heat recovery heat exchanger tedge 1 will change, and cause to exchange heat cold
Medium entrance 2 and heat exchange cold medium export 3 imbalance of pressure intracavitary in balanced valve piston valve core 12-3 pressure at two ends, so that P1
+ P2 < P3+P4, balanced valve piston valve core 12-3 are moved down, and are provided on balanced valve piston valve core 12-3 down big up small
Horn mouth, balanced valve piston valve core 12-3 move down the aperture that proportion expression reduces heat transferring medium import balanced valve 12, drop
The low flow of heat transferring medium, heat recovery heat exchanger tedge 1 needs to reduce heat transferring medium supply and is taken with realizing at this time
The thermal efficiency maximizes, in this way, also achieving heat transferring medium flow optimal control.
When interior leakage occurs in heat recovery heat exchanger tedge 1, raw coke oven gas in heat recovery heat exchanger tedge 1 is flowed into
Heat transferring medium meeting instant vaporization, causes the pressure difference of P2 and P4 increased dramatically, so that P1+P2 < < P3+P4, balanced valve plunger valve
It is irrecoverable that core 12-3 is quickly moved downward to dead point, and heat transferring medium import balanced valve 12 is closed, cutting waste heat recycling heat exchange
The entrance of heat transferring medium in device tedge 1；The check valve being equipped with due to 1 heat transferring medium of heat recovery heat exchanger tedge outlet 3
13, it automatically cuts off medium at heat transferring medium outlet 3 and inversely flows into heat recovery heat exchanger tedge 1, avoid changing to realize
Thermal medium largely flows into the control of coke oven.
Balanced valve is the principle that flow pressure-difference variation relation is solved using equilibrium principle, can also be developed into single-ended
Pressure difference adjustable type, such as adjust the structure of valve type.
Embodiment 2: balanced valve is cut off using heat recovery heat exchanger ascending tube crude-gas outlet pressure
Referring to fig. 2, a kind of raw coke oven gas heat recovery heat exchanger tedge of the present invention, it includes waste heat recycling heat exchange
Device tedge 1, around being equipped with heat transferring medium pipe (or other forms device, such as heat on 1 tube wall of heat recovery heat exchanger tedge
Collet etc.), the heat transferring medium pipe includes heat transferring medium import 2 and heat transferring medium outlet 3, is connected at the heat transferring medium import 2
It connects and is provided with heat transferring medium import balanced valve 12, the heat transferring medium import balanced valve 12 includes balanced valve piston valve core 12-
3, the two sides balanced valve piston valve core 12-3 are respectively arranged with balanced valve import 12-1 and balancing valve outlet 12-2, described flat
Weighing apparatus valve outlet 12-2 is connected with heat transferring medium import 2, and the balanced valve import 12-1 connect access heat transferring medium with Outer Tube,
The lower end balanced valve piston valve core 12-3 is connected with first piston chamber 12-5, is provided with and changes on the first piston chamber 12-5
Thermal medium inlet impulse ozzle 12-4, the upper end balanced valve piston valve core 12-3 are connected with the third piston being connected in series in turn
Balancing spring 12-10, the third piston are provided in chamber 12-9 and the 4th plunger shaft 12-11, the third plunger shaft 12-9
It is provided on chamber 12-9 on heat transferring medium outlet impulse ozzle 12-8, the 4th plunger shaft 12-11 and is provided with raw coke oven gas outlet
Impulse ozzle 12-12, the heat transferring medium pipe are respectively set at 3 positions of heat transferring medium import 2 and heat transferring medium outlet
There are heat transferring medium entrance impulse mouth 4 and heat transferring medium outlet impulse mouth 6, the heat recovery heat exchanger tedge 1 is close to upper
Raw coke oven gas outlet impulse mouth 10, the heat transferring medium entrance impulse mouth 4 and heat transferring medium import pressure guiding pipe are provided at end position
Heat transferring medium entrance pressure guiding pipe 5 is connected between mouth 12-4, the heat transferring medium outlet impulse mouth 6 and heat transferring medium export
Heat transferring medium outlet pressure guiding pipe 7, the raw coke oven gas outlet impulse mouth 10 and raw coke oven gas are connected between impulse ozzle 12-8
Raw coke oven gas outlet pressure guiding pipe 11 is connected between outlet impulse ozzle 12-12；
It is provided with the check valve 13 installed in the same direction with heat transferring medium at the heat transferring medium outlet 3, is avoided on stopping this
When riser continues to run, there are also heat transferring mediums inversely to flow into coke oven.
The essence of raw coke oven gas heat recovery heat exchanger tedge binary automatic protection is by heat transferring medium import balanced valve
12 are adjusted protection, and adjusting protection philosophy is heat transferring medium import balanced valve 12 for raw coke oven gas heat recovery heat exchanger
The adjusting of the heat transferring medium flow of tedge 1 controls, and specific control method is as follows:
Initial flow is set, heat transferring medium entrance impulse mouth 4 is living using the connection of heat transferring medium entrance pressure guiding pipe 5 access first
The heat transferring medium import impulse ozzle 12-4 on chamber 12-5 is filled in, it is P1 that pressure is formed in the first piston chamber 12-5 that it is communicated；
At this moment the pressure for acting on the lower end surface balanced valve piston valve core 12-3 is P1；
Heat transferring medium exports the heat exchange that impulse mouth 6 is accessed using heat transferring medium outlet pressure guiding pipe 7 on third plunger shaft 12-9
Media outlet impulse ozzle 12-8, third plunger shaft 12-9 are provided with balancing spring 12-10, heat transferring medium outlet pressure+balance
The pressure of spring 12-10 and be P3；Raw coke oven gas exports impulse mouth 10 using the raw coke oven gas outlet connection of pressure guiding pipe 11 access and third
Raw coke oven gas on the 4th plunger shaft 12-11 that plunger shaft 12-9 is unidirectionally connected in series exports impulse ozzle 12-12, communicates the at it
It is P4 that pressure is formed in four plunger shaft 12-11 (P4 is usually normal pressure or micro-positive pressure under normal operation)；At this moment it acts on flat
The pressure of the weighing apparatus upper surface valve piston formula spool 12-3 is P3+P4；
So that the opening size of piston hole when P1=P3+P4 is identical as setting value, that is to say, that the setting of initial flow
It is the suitable ratio value for meeting the feedwater flow and evaporation capacity of 1 heat transfer requirements of heat recovery heat exchanger tedge, balances at this time
The aperture of valve piston formula spool 12-3 aperture is after initial set value, the operation of heat recovery heat exchanger tedge 1 can be real
It is existing.
When raw coke oven gas quantum of output variation in coke oven operational process and the heat exchange evaporation capacity variation of heat recovery heat exchanger tedge 1
Increase when being increased based on heat, the pressure formed in heat recovery heat exchanger tedge 1 will change, cause to exchange heat cold medium into
Mouth 2 exports 3 imbalance of pressure intracavitary in balanced valve piston valve core 12-3 pressure at two ends with heat exchange cold medium, so that P1 > P3+
P4, balanced valve piston valve core 12-3 is moved up at this time, is provided with down big up small loudspeaker on balanced valve piston valve core 12-3
Mouthful, balanced valve piston valve core 12-3 moves up proportion expression and increases the aperture of heat transferring medium import balanced valve 12, increases
The flow of heat transferring medium, heat recovery heat exchanger tedge 1 needs to increase heat transferring medium supply and exchanges thermal effect for realize at this time
Rate maximizes, so, realize heat transferring medium flow optimal control；
Conversely, when raw coke oven gas quantum of output variation in coke oven operational process and the heat exchange evaporation of heat recovery heat exchanger tedge 1
When amount variation is reduced based on heat reduction, the pressure formed in heat recovery heat exchanger tedge 1 will change, and cause to exchange heat cold
Medium entrance 2 and heat exchange cold medium export 3 imbalance of pressure intracavitary in balanced valve piston valve core 12-3 pressure at two ends, so that P1
< P3+P4, balanced valve piston valve core 12-3 are moved down, and are provided with down big up small loudspeaker on balanced valve piston valve core 12-3
Mouthful, balanced valve piston valve core 12-3 moves down the aperture that proportion expression reduces heat transferring medium import balanced valve 12, reduces
The flow of heat transferring medium, heat recovery heat exchanger tedge 1 needs to reduce heat transferring medium supply and takes thermal effect to realize at this time
Rate maximizes, in this way, also achieving heat transferring medium flow optimal control.
When interior leakage occurs in heat recovery heat exchanger tedge 1, raw coke oven gas in heat recovery heat exchanger tedge 1 is flowed into
Heat transferring medium meeting instant vaporization, causes the pressure of P4 increased dramatically, so that P1 < < P3+P4, balanced valve piston valve core 12-3
It is irrecoverable to be quickly moved downward to dead point, heat transferring medium import balanced valve 12 is closed, cutting heat recovery heat exchanger rises
The entrance of heat transferring medium in pipe 1；Due to the check valve 13 that 1 heat transferring medium of heat recovery heat exchanger tedge outlet 3 is equipped with, automatically
Medium inversely flows into heat recovery heat exchanger tedge 1 at cutting heat transferring medium outlet 3, avoids heat transferring medium big to realize
Amount flows into the control of coke oven.
Balanced valve is the principle that flow pressure-difference variation relation is solved using equilibrium principle, can also be developed into single-ended
Pressure difference adjustable type, such as adjust the structure of valve type.
It is all up and down to refer in above content, can be orientation, the principle of balance such as front and back up and down and be also possible to live
The technical solution that the basic principles such as the diaphragm control valve other than plug communicate.
Outside above-described embodiment, the invention also includes have other embodiments, all use equivalent transformation or equivalent replacement sides
The technical solution that formula is formed, should all fall within the scope of the hereto appended claims.
Claims (9)
1. a kind of raw coke oven gas heat recovery heat exchanger tedge, it is characterised in that: it includes heat recovery heat exchanger tedge
(1), around heat transferring medium pipe is equipped on heat recovery heat exchanger tedge (1) tube wall, the heat transferring medium pipe includes heat exchange
Medium entrance (2) and heat transferring medium export (3), and heat transferring medium import balance is connected at the heat transferring medium import (2)
Valve (12), the heat transferring medium import balanced valve (12) include balanced valve piston valve core (12-3), the balanced valve piston type
The two sides spool (12-3) are respectively arranged with balanced valve import (12-1) and balancing valve outlet (12-2), the balancing valve outlet (12-
2) it is connected with heat transferring medium import (2), the balanced valve import (12-1) connect access heat transferring medium with Outer Tube, described flat
Weighing apparatus lower end valve piston formula spool (12-3) is connected with first piston chamber (12-5), is provided with and is changed on the first piston chamber (12-5)
Thermal medium inlet impulse ozzle (12-4), balanced valve piston valve core (12-3) upper end are connected with the third being connected in series in turn
Plunger shaft (12-9) and the 4th plunger shaft (12-11) are provided with heat transferring medium outlet impulse on the third plunger shaft (12-9)
Ozzle (12-8) is provided with raw coke oven gas outlet impulse ozzle (12-12), heat exchange Jie on the 4th plunger shaft (12-11)
Matter pipe is being respectively arranged with heat transferring medium entrance impulse mouth at heat transferring medium import (2) and heat transferring medium outlet (3) position
(4) it is provided with heat transferring medium outlet impulse mouth (6), the heat recovery heat exchanger tedge (1) at upper end position
Raw coke oven gas exports impulse mouth (10), the heat transferring medium entrance impulse mouth (4) and heat transferring medium import impulse ozzle (12-4) it
Between be connected with heat transferring medium entrance pressure guiding pipe (5), heat transferring medium outlet impulse mouth (6) and heat transferring medium export impulse
Heat transferring medium outlet pressure guiding pipe (7), raw coke oven gas outlet impulse mouth (10) and waste coal are connected between ozzle (12-8)
Raw coke oven gas outlet pressure guiding pipe (11) is connected between gas outlet impulse ozzle (12-12).
2. a kind of raw coke oven gas heat recovery heat exchanger tedge according to claim 1, it is characterised in that: described first is living
It has been arranged in series second piston chamber (12-6) below plug chamber (12-5), has been provided with raw coke oven gas on the second piston chamber (12-6) and enters
Mouth impulse ozzle (12-7), the heat recovery heat exchanger tedge (1) are being provided with raw coke oven gas entrance at lower end position
Impulse mouth (8) is connected with waste coal between the raw coke oven gas entrance impulse mouth (8) and raw coke oven gas entrance impulse ozzle (12-7)
Gas entrance pressure guiding pipe (9).
3. a kind of raw coke oven gas heat recovery heat exchanger tedge according to claim 1, it is characterised in that: the heat exchange is situated between
The check valve (13) installed in the same direction with heat transferring medium is provided at matter outlet (3).
4. a kind of raw coke oven gas heat recovery heat exchanger tedge according to claim 1, it is characterised in that: the third is living
Balancing spring (12-10) is provided in plug chamber (12-9).
5. a kind of raw coke oven gas heat recovery heat exchanger tedge according to claim 1, it is characterised in that: the balanced valve
Down big up small horn mouth is provided on piston valve core (12-3).
6. a kind of control method of raw coke oven gas heat recovery heat exchanger tedge, it is characterised in that the control method includes following
Step:
Initial flow is set, heat transferring medium entrance impulse mouth is using on heat transferring medium entrance pressure guiding pipe connection access first piston chamber
Heat transferring medium import impulse ozzle, the intracavitary formation pressure of first piston that it is communicated be P1；At this moment it is living to act on balanced valve
The pressure of plug spool lower end surface is P1；
Heat transferring medium outlet impulse mouth is drawn using the heat transferring medium outlet in heat transferring medium outlet pressure guiding pipe access third plunger shaft
Pressure pipe mouth, third plunger shaft are provided with balancing spring, heat transferring medium outlet pressure+balancing spring pressure and be P3；Raw coke oven gas
Outlet impulse mouth is accessed in the 4th plunger shaft being unidirectionally connected in series with third plunger shaft using raw coke oven gas outlet pressure guiding pipe connection
Raw coke oven gas export impulse ozzle, its communicate in the 4th plunger shaft formed pressure be P4；At this moment balanced valve piston type is acted on
The pressure of spool upper surface is P3+P4；
So that the opening size of piston hole when P1=P3+P4 is identical as setting value, i.e. the setting of initial flow is to meet waste heat
The feedwater flow of heat exchanger tedge heat transfer requirements and the suitable ratio value of evaporation capacity are recycled, at this time balanced valve piston valve core
The aperture of aperture is after initial set value, the operation of heat recovery heat exchanger tedge can be realized；
When raw coke oven gas quantum of output variation in coke oven operational process and the heat exchange evaporation capacity variation of heat recovery heat exchanger tedge increases
When being increased based on heat, the pressure formed in heat recovery heat exchanger tedge will change, cause to exchange heat cold medium import with
The cold medium that exchanges heat exports the imbalance of pressure intracavitary in balanced valve piston valve core pressure at two ends, so that P1 > P3+P4, balances at this time
Valve piston formula spool moves up, and balanced valve piston valve core moves up proportion expression and increases heat transferring medium import balanced valve
Aperture increases the flow of heat transferring medium, and heat recovery heat exchanger tedge needs to increase heat transferring medium supply with reality at this time
It now exchanges thermal efficiency maximization for, realizes heat transferring medium flow optimal control；
Conversely, when raw coke oven gas quantum of output variation in coke oven operational process and the heat exchange evaporation capacity variation of heat recovery heat exchanger tedge
Reduce when being reduced based on heat, the pressure formed in heat recovery heat exchanger tedge will change, cause to exchange heat cold medium into
Mouth exports the imbalance of pressure intracavitary in balanced valve piston valve core pressure at two ends with heat exchange cold medium, so that P1 < P3+P4, balance
Valve piston formula spool moves down, and balanced valve piston valve core moves down proportion expression and reduces heat transferring medium import balanced valve
Aperture reduces the flow of heat transferring medium, and heat recovery heat exchanger tedge needs to reduce heat transferring medium supply with reality at this time
Maximum heat exchange efficiency is now taken, heat transferring medium flow optimal control is also achieved；
When raw coke oven gas quantum of output variation in coke oven operational process and the heat exchange evaporation capacity variation of heat recovery heat exchanger tedge increases
When being increased based on heat, the pressure formed in heat recovery heat exchanger tedge will change, cause to exchange heat cold medium import with
The cold medium that exchanges heat exports the imbalance of pressure intracavitary in balanced valve piston valve core pressure at two ends, so that P1+P2 > P3+P4, at this time
Balanced valve piston valve core moves up, and balanced valve piston valve core moves up proportion expression, and to increase heat exchange cold medium import flat
The aperture of weighing apparatus valve, increases the flow of heat transferring medium, and heat recovery heat exchanger tedge needs to increase heat transferring medium supply at this time
Amount is to realize that exchanging the thermal efficiency for maximizes, and realizes heat transferring medium flow optimal control；
Conversely, when raw coke oven gas quantum of output variation in coke oven operational process and the heat exchange evaporation capacity variation of heat recovery heat exchanger tedge
Reduce when being reduced based on heat, the pressure formed in heat recovery heat exchanger tedge will change, cause to exchange heat cold medium into
Mouth exports the imbalance of pressure intracavitary in balanced valve piston valve core pressure at two ends with heat exchange cold medium, so that P1+P2 < P3+P4,
Balanced valve piston valve core moves down, and balanced valve piston valve core moves down proportion expression, and to reduce heat exchange cold medium import flat
The aperture of weighing apparatus valve, reduces the flow of heat transferring medium, and heat recovery heat exchanger tedge needs to reduce heat transferring medium supply at this time
Amount takes maximum heat exchange efficiency to realize, realizes heat transferring medium flow optimal control.
7. a kind of control method of raw coke oven gas heat recovery heat exchanger tedge according to claim 6, it is characterised in that:
In heat recovery heat exchanger tedge occurs when leakage, the heat transferring medium meeting of raw coke oven gas in heat recovery heat exchanger tedge is flowed into
Instant vaporization causes the pressure of P4 increased dramatically, so that P1 < < P3+P4, balanced valve piston valve core are quickly moved downward to
Dead point is irrecoverable, by heat transferring medium import balanced valve close, cut off heat recovery heat exchanger tedge in heat transferring medium into
Enter；Since heat recovery heat exchanger tedge heat transferring medium exports the check valve being equipped with, heat transferring medium exit Jie is automatically cut off
Matter inversely flows into heat recovery heat exchanger tedge, to realize the control for avoiding heat transferring medium from largely flowing into coke oven.
8. a kind of control method of raw coke oven gas heat recovery heat exchanger tedge, it is characterised in that the control method includes following
Step:
Initial flow is set, heat transferring medium entrance impulse mouth is using on heat transferring medium entrance pressure guiding pipe connection access first piston chamber
Heat transferring medium import impulse ozzle, the intracavitary formation pressure of first piston that it is communicated be P1；Raw coke oven gas entrance impulse mouth is adopted
The raw coke oven gas entrance on the second piston chamber being unidirectionally connected in series with first piston chamber is accessed with the connection of raw coke oven gas entrance pressure guiding pipe
Impulse ozzle is P2 in the intracavitary formation pressure of second piston that it is communicated；At this moment balanced valve piston valve core lower end surface is acted on
Pressure be P1+P2；
Heat transferring medium outlet impulse mouth is drawn using the heat transferring medium outlet in heat transferring medium outlet pressure guiding pipe access third plunger shaft
Pressure pipe mouth, third plunger shaft are provided with balancing spring, heat transferring medium outlet pressure+balancing spring pressure and be P3；Raw coke oven gas
Outlet impulse mouth is accessed in the 4th plunger shaft being unidirectionally connected in series with third plunger shaft using raw coke oven gas outlet pressure guiding pipe connection
Raw coke oven gas export impulse ozzle, its communicate in the 4th plunger shaft formed pressure be P4；At this moment balanced valve piston type is acted on
The pressure of spool upper surface is P3+P4；
So that the opening size of piston hole when P1+P2=P3+P4 is identical as setting value, i.e. the setting of initial flow is more than satisfaction
The feedwater flow of heat recovering heat exchanger tedge heat transfer requirements and the suitable ratio value of evaporation capacity, at this time balanced valve plunger valve
The aperture of core aperture is after initial set value, the operation of heat recovery heat exchanger tedge can be realized；
When raw coke oven gas quantum of output variation in coke oven operational process and the heat exchange evaporation capacity variation of heat recovery heat exchanger tedge increases
When being increased based on heat, the pressure formed in heat recovery heat exchanger tedge will change, cause to exchange heat cold medium import with
The cold medium that exchanges heat exports the imbalance of pressure intracavitary in balanced valve piston valve core pressure at two ends, so that P1+P2 > P3+P4, at this time
Balanced valve piston valve core moves up, and balanced valve piston valve core moves up proportion expression and increases heat transferring medium import balance
The aperture of valve increases the flow of heat transferring medium, and heat recovery heat exchanger tedge needs to increase heat transferring medium supply at this time
To realize that exchanging the thermal efficiency for maximizes, and realizes heat transferring medium flow optimal control；
Conversely, when raw coke oven gas quantum of output variation in coke oven operational process and the heat exchange evaporation capacity variation of heat recovery heat exchanger tedge
Reduce when being reduced based on heat, the pressure formed in heat recovery heat exchanger tedge will change, cause to exchange heat cold medium into
Mouth exports the imbalance of pressure intracavitary in balanced valve piston valve core pressure at two ends with heat exchange cold medium, so that P1+P2 < P3+P4,
Balanced valve piston valve core moves down, and balanced valve piston valve core moves down proportion expression and reduces heat transferring medium import balance
The aperture of valve reduces the flow of heat transferring medium, and heat recovery heat exchanger tedge needs to reduce heat transferring medium supply at this time
Maximum heat exchange efficiency is taken to realize, also achieves heat transferring medium flow optimal control.
9. a kind of control method of raw coke oven gas heat recovery heat exchanger tedge according to claim 8, it is characterised in that:
In heat recovery heat exchanger tedge occurs when leakage, the heat transferring medium meeting of raw coke oven gas in heat recovery heat exchanger tedge is flowed into
Instant vaporization causes the pressure difference of P2 and P4 increased dramatically, so that P1+P2 < < P3+P4, balanced valve piston valve core are quickly downward
It is irrecoverable to be moved to dead point, closes heat exchange cold medium import balanced valve, cutting raw coke oven gas heat recovery heat exchanger tedge changes
The entrance of thermal medium automatically cuts off heat exchange and is situated between since heat recovery heat exchanger tedge heat transferring medium exports the check valve being equipped with
Matter exports the reverse inflow heat recovery heat exchanger tedge of medium, and realization avoids heat transferring medium from largely flowing into coke oven control.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2001014812A1 (en) * | 1999-08-25 | 2001-03-01 | Feng Lang | Heat exchanger |
| CN203498304U (en) * | 2013-11-27 | 2014-03-26 | 舜龙重工（常州）机械有限公司 | Riser waste heat recoverer |
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| CN110511770B (en) | 2023-12-12 |
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