CN102791831A - Coal distilled gas hot treatment facility and coke oven gas hot treatment facility - Google Patents

Abstract

Provided is a coal distilled gas hot treatment facility that distills carbon-containing solids by heat-treating coal distilled gas steam extracted from a plurality of coal distilling devices at an inflow temperature of 700 DEG C to 1200 DEG C, and comprises: a gas extraction pipe provided to each of the coal distilling devices; a non-return valve provided to each of the gas extraction pipes; a collection pipe connected by the gas extraction pipes; and a coal distilled gas treatment device connected to the collection pipe. The gas extraction pipes, the non-return valves, the collection pipe, and the coal distilled gas treatment device are provided in an atmosphere that has been heated to a temperature of 700 DEG C to 1200 DEG C, and the coal distilled gas flows through the coal distilling devices, the gas extraction pipes, the non-return valves, the collection pipe, and the coal distilled gas treatment device, in that order.

Description

Dry distillation of coal gas HTFX and coke oven gas HTFX

Technical field

The present invention relates to dry distillation of coal gas HTFX that the high temperature dry distillation of coal gas of from dry distillation of coal device, extracting out is heat-treated.More detailed, the present invention relates in this dry distillation of coal gas HTFX the coke oven gas HTFX that the high-temperature coking furnace gas of from the coking stove, extracting out is heat-treated.

The application with on March 31st, 2010 spy in japanese publication be willing to serve as for 2010-082294 number that right of priority is advocated on the basis, here cite its content.

Background technology

For example, coke oven gas (the Coke Oven Gas that produces during with coal carbonization with collecting tubule of the pit kiln of ironmaking usefulness.Below be called " COG ") be used for fuel after reclaiming.The COG that is produced is owing to be in the condition of high temperature that reaches about 1200 ℃, so the utilization that can carry out gas sensible heat is reclaimed, or utilize its high temperature to carry out the utilizations such as reformation of gas.Below, the device of above-mentioned processing high temperature CO G is called high temperature coke oven gas disposal equipment.For example, in patent documentation 4, a kind of gas reforming device that carries out the reformation of high temperature CO G is disclosed.In addition, in patent documentation 5, the heat recovering device of a kind of COG is disclosed.

In pit kiln, owing to be to carry out coal carbonization, so general can produce a large amount of COG at the destructive distillation initial stage on each coking stove discontinuous formula ground.Then, COG produces with the so-called unsettled mode that generation descends gradually, its composition that accompanies therewith also changes.Therefore, the destructive distillation of the many coking stoves that adjoin each other is staggered the zero hour each other.Thus, when coming equalization, can make the generation of COG balanced in time as coking stove integral body.For high temperature coke oven gas disposal equipment,, then might become the big hindering factor in the processing if the gas vol or the composition that flow into significantly change.Therefore, need to mix through the COG that will from many coking stoves, extract out as much as possible, reduce the change of its generation and composition.

In patent documentation 2, proposed a kind of a plurality of coking stoves to be provided with extraction pipe and stopping valve respectively, and they are connected with collecting tubule and have compiled the COG treatment unit (HRU) of COG.

Use Fig. 1 that one example of in the past pit kiln is described below.As shown in the drawing, on these routine a plurality of coking stoves 21 that pit kiln possessed, be respectively arranged with upcast 25 and the water-sealed valve 22 and the sparging unit 23 that are connected with this upcast 25.Then, the COG that extracts out through all upcasts 25 is come together in the dry main 24 as collecting tubule, is sent to not shown COG treatment unit then.Water-sealed valve 22 uses Construction integration usually with sparging unit 23.Each water-sealed valve 22 stops the circulation of the COG between each coking stove 21 and the dry main 24 as required.Each sparging unit 23 carries out the cooling of COG and adjusts with the pressure in each coking stove 21.

The device of aforesaid patent documentation 2 is as shown in Figure 2, and coking stove 21 in the past shown in Figure 1 is provided with extraction pipe 26 and stopping valve 37, extracts COG out and comes together in collecting tubule 28 from each coking stove 21 through them.Then, this COG that compiles is supplied to the COG treatment unit 29 in the downstream that are in collecting tubule 28.

In addition; " dry distillation of coal gas " is meant; With coal or the mixed gas that contains tarry vapours and other inflammable gas that produces from the raw material destructive distillation of coal, comprise COG, continuously or cooking gases (coking gas) such as semi continuous process furnace gas that the dry distillation of coal is obtained or pitch with kiln etc.

The prior art document

Patent documentation

Patent documentation 1: TOHKEMY 2004-107466 communique

Patent documentation 2: the real public clear 62-39077 communique of Japan

Patent documentation 3: Japan opens clear 58-7847 communique in fact

Patent documentation 4: TOHKEMY 2003-55671 communique

Patent documentation 5: japanese kokai publication sho 63-3088 communique

Summary of the invention

The problem that invention will solve

But there is following problem in this technology in the past shown in Figure 2.

The 1st problem is following problems, that is, with the pipeline that comprises stopping valve 37 of the high temperature CO G that extracts out from each coking stove 21 (below, be called " wet COG ") contact in, can produce a large amount of dirt settlings.Particularly, because to contain high boiling point gas be tar, so drop to when being lower than 700 ℃ when the temperature of the COG that wets, tar just condenses among the wet COG.After in a single day tar condensed, character just changed, even heating once more, also evaporation scarcely easily.In addition, the carbon that contains with the form of hydrocarbon such as the methane among the wet COG decomposes under the high temperature more than 700 ℃ and separates out (this phenomenon is called " coking ") as solid carbon (coal).In case the solid carbon of separating out is owing to combining securely each other, so even reduce its temperature once more, also be not easy hydrocarbonylation.

In technology in the past, when wet COG was circulated, tar that wherein contains or solid carbon can be attached to the contact surface in the pipeline systems equipment (pipeline, valve, gas blower etc.) in a large number, the difficulty so the operation of pipeline systems equipment might become.Owing to there is this situation, so in the past in the technology, the wet COG that produces in each coking stove 21 once discharge, just carries out water-cooled and normal temperatureization from each upcast 25 immediately.At this moment, tar condenses and from wet COG, separates, and is mixed in the water coolant and is removed, thus only the low-boiling point gas among the wet COG of normal temperature (below, be called " doing COG ") acting as a fuel is recovered.When this dried COG is circulated, special problem can not take place, so can be suitable for the pipeline systems equipment that general industrial is used.Therefore, the air-flow in the pilot piping freely.

On the other hand, the internal surface of each upcast 25 is owing to have to contact with the oily wet COG that defocuses of not eliminating, so the coking on the internal surface of these upcasts 25 is inevitable.In addition, wet COG might low temperatureization in the operation of a series of dry distillation of coal operation.At this moment, also might the wet milkstone of the tar among the COG is attached to the internal surface of each upcast 25 and forms firm fixation layer.If continue operation, then these dirt settlings constantly increase and stop up the pipeline of each upcast 25, thus every at a distance from certain SP, for example all need carry out the operation that carbon that the internal surface with upcast 25 adheres to is burnt every day.The above-mentioned tar that in upcast 25, produces adheres to or pyrogenic problem is not limited only to upcast 25, is all contingent problem on the whole pipeline system that makes wet COG circulation.

In addition, in wet COG, from the diameter of fine coal for the coal dust of number μ m to the number mm with for example 1g/m ³Above high density is floating.Therefore, in order to seal wet COG, even adopt accurate mechanical seal, above-mentioned coal dust also gets into the sealing of mechanical seal easily, has the extreme problem that worsens of stopping property that makes.

Therefore, in technology in the past since exist that tar adheres to or coking and gas in the problem that causes of coal dust, so the sensible heat of wet COG almost is not utilized just by rapid water-cooled.For example shown in the patent documentation 1, between upcast 25 and dry main 24, be provided with in the method for regulating valve; The wet COG that flows through regulating valve is that distribution through injection water is by the COG of low temperatureization; And; With independent regulating valve can not block gas circulation, so need water-sealed valve in addition.

In order to tackle the problems referred to above; In patent documentation 2; Consider and can't avoid the inner a large amount of tar of stopping valve to adhere to, as shown in Figure 2, a kind of following formation is disclosed: the hot air generator 38 that other generation pyritous oxidizing gas is set; For each stopping valve 37, the pyritous oxidizing gas is directed in the valve body through hot-blast conduit 39.Constitute according to this, the tar that can be when at every turn carrying out the closing of valve valve be adhered in the intravital non-tight portion is removed processing.But, complicated operation, and frequent switching is difficult.In addition; This device utilizes inevitable tar to adhere to energetically, when the closing of valve, gives high contact pressure, makes spool rotational slide on valve seat simultaneously; The tar that adheres on valve seat or the spool is out of shape and the utilization of conduct sealing material, thereby carries out the sealing of valve.Therefore, in the technology of patent documentation 2, adhering to of tar is prerequisite, and as making tar agglomerative condition, the COG that must will wet is chilled to and is lower than 700 ℃ at least, preferably is cooled to the temperature below 600 ℃.

Simultaneously,, need give spool and valve seat bigger power, so, must the intravital temperature of valve (that is the temperature of wet COG) be remained on the lower temperature below 600 ℃ in order to ensure the physical strength of the constituent material of valve in order to carry out on-off action.In addition; To the heat supply of stopping valve owing to be that the inside that utilizes the sensible heat of hot blast or the wet COG of the oxidisability of passing through in the valve body to produce is heated and carried out; So particularly when the flow of the wet COG through extraction pipe hour, can be supplied to the shortage of heat of stopping valve.At this moment, the temperature of stopping valve internal surface might extremely descend, and the most of tar among the wet COG is condensed in the internal surface of stopping valve and stops up valve.

The 2nd problem be, in the method for patent documentation 2, wet COG in the time before arriving the COG treatment unit tar just be condensed in the pipeline system, reduce so arrive the amount of the tar of COG treatment unit.Because the main application of COG treatment unit is the reformation of the tar among the COG, so, can't the above-mentioned system device of bleeding be applied to this purposes at least.

The 3rd problem be, in the technology of above-mentioned patent documentation 2, gives removing of heat and tar for what carry out valve, the supply oxidisability hot blast gas in stopping valve 37 of having to, and its exhaust is supplied to COG treatment unit 29 via collecting tubule 28.Because wet COG is the gas of reductibility, so when mixing with above-mentioned oxidisability hot blast gas, the useful component among the wet COG burns, and makes CO, CO ₂Or the rudimentary gaseous constituent of purposes such as water vapour increases in wet COG, because of rather than preferably.

The 4th problem be, the device of above-mentioned patent documentation 2 is opening and closing operations of judging stopping valve according to the generation of the wet COG in each coking stove 21, but of the back, such operation might cause the adverse current of the COG that bleeds that flows to each coking stove 21.

Promptly; Owing to need to open and close the pipeline of upcast 25; So be bonded on the upcast 25 for fear of separate out the lid (not shown) that makes upcast 25 because of dirt settling, be employed in the past the space is set between upcast 25 and the lid in advance, the structure that the COG that will not wet seals fully always.But wet COG directly circulates although above-mentioned lid can make pyritous, during close cap, stops the function of gas communication lower, can only obtain the close power the same with baffle plate (damper).And, discoveries such as present inventor: when with coking stove 21 internal-phase ratio, when the pressure in downstream side was higher, the situation of gas a large amount of adverse currents through the slit around the said lid can not be prevented from.Owing to generally sneaked into extraneous air in the withdrawing gas, from various viewpoints such as COG quality and operability deteriorations, it is not preferred the withdrawing gas that contains the oxygen in the extraneous air is flowed into reaching in the pyritous coking stove 21 more than 1000 ℃.In addition, be heated to the temperature higher,, then have problems such as damage stove material if such high temperature CO G adverse current is gone in the coking stove than extraction temperature as the COG treatment unit of the object of the present invention COG that will bleed possibly.In addition, each coking stove 21 is owing to be to carry out batch production, so in order in each coking stove 21, to pack into or to take out coke, perhaps clean in the stove, coking stove 21 usually will be to atmosphere opening.To the coking stove 21 of atmosphere opening, the wet COG adverse current of extraction will be spread in the atmosphere, thereby not preferred for like this.In the above-mentioned pit kiln operating procedure, except specific kiln to extraneous air under the situation (that is, all kilns are all to the air-tight situation in outside) open, COG also might take place from the valve of the specific kiln adverse current to kiln.Change because the COG in each kiln produces speed, the pressure in the kiln also changes thereupon astablely, thus above-mentioned adverse current be difficult to prediction.Therefore, prediction adverse current occurrence time and the operational method of interrupting in advance bleeding can not be suitable for.

Extract wet COG out and carry out COG when handling from a plurality of coking stoves 21, only selected to make the wet COG low temperatureization of extraction and make tar condense in a large number, or adopt the bigger baffle plate in slit when closing and allow the adverse current of gas.Therefore, no matter on heat still be composition, quality was all lower for the wet COG that extracts out from each coking stove 21, and owing to coke oven gas is very big in the restriction of heat-treating more than 700 ℃, so practicability not almost.

Therefore; The present invention accomplishes in view of the above problems; Purpose provides a kind of COG that will wet and is supplied to the coke oven gas treatment unit under the pyritous situation being maintained at, and can prevent dry distillation of coal gas HTFX and coke oven gas HTFX to the adverse current of its pit kiln.

The means of dealing with problems

In order to solve above-mentioned problem, the form below adopting.

(1) promptly; The dry distillation of coal gas HTFX of a form of the present invention is through under 700 ℃～1200 ℃ inflow temperature, the dry distillation of coal gas of from a plurality of dry distillation of coal devices, extracting out being heat-treated; Carbonaceous solids is carried out pyrogenous equipment, and it possesses: the extraction pipe that on each said dry distillation of coal device, is provided with; The vacuum breaker that on these extraction pipes, is provided with respectively; The collecting tubule that has connected said each extraction pipe; And the dry distillation of coal gas disposal device that is connected with said collecting tubule; Wherein, Said each extraction pipe, said each vacuum breaker, said collecting tubule and said dry distillation of coal gas disposal device are arranged in 700 ℃～1200 ℃ the heating atmosphere, and said dry distillation of coal gas is according to the sequential flow mistake of said each dry distillation of coal device, said each extraction pipe, said each vacuum breaker, said collecting tubule and said dry distillation of coal gas disposal device.

(2) in addition; The coke oven gas HTFX of another form of the present invention is the equipment of under 700 ℃～1200 ℃ inflow temperature, the coke oven gas of from a plurality of coking stoves, extracting out being heat-treated, and it possesses: the extraction pipe that on each said coking stove, is provided with; The vacuum breaker that on these extraction pipes, is provided with respectively; The collecting tubule that has connected said each extraction pipe; And the coke oven gas treatment unit that is connected with said collecting tubule; Wherein, Said each extraction pipe, said each vacuum breaker, said collecting tubule and said coke oven gas treatment unit are arranged in 700 ℃～1200 ℃ the heating atmosphere, and said coke oven gas is according to the sequential flow mistake of said each coking stove, said each extraction pipe, said each vacuum breaker, said collecting tubule and said coke oven gas treatment unit.

(3) in addition; The coke oven gas HTFX of above-mentioned (2) record can also further possess: the furnace pressure meter; It is separately positioned on between said each coking stove to the inlet of said each vacuum breaker, is used to measure the 1st pressure in said each coking stove; The collecting tubule pressure warning unit, it is being provided with between the said collecting tubule of being exported to of said each vacuum breaker, is used to measure the 2nd pressure in the said collecting tubule; And vacuum breaker gear; Its pressure reduction of calculating said the 1st pressure and said the 2nd pressure is to detect the generation of the adverse current in said each extraction pipe; And, when in said each extraction pipe the extraction pipe of the adverse current that said coke oven gas has taken place being arranged, close the said vacuum breaker that is provided with on this extraction pipe.

(4) in the coke oven gas HTFX of above-mentioned (3) record, said each vacuum breaker can also possess respectively: valve body; The sealing material, it is arranged at the intravital bottom of this valve, in the TR of normal temperature to 900 ℃, has thermotolerance; The gas inflow pipe, it is according to connecting said valve body and said sealing material in the inside of said valve body and in the mode than the surface of the said sealing material internal space inner opening above more, and the said coke oven gas from said each coking stove is flowed into; The gas outlet pipe, and in said internal space inner opening, and said coke oven gas discharged to said coke oven gas treatment unit from said internal space through said collecting tubule; Spool; It is configured between off-position and open position, freely move; Said off-position be under the state of the opening that covers said gas inflow pipe at least its peristome bury the position in said sealing material, said open position is the position of extracting said peristome out from said sealing material; And the spool running gear, it moves said spool between said off-position and said open position.

In addition; The characteristic of facing the form of above-mentioned (2) record down describes; It is characterized in that having taken into account 2 following technology for the first time: the pipeline system configurations that makes coke oven gas (below be called wet COG) circulation through will comprising vacuum breaker is in heating atmosphere; Can be maintained at the COG that will wet and be supplied to the coke oven gas treatment unit under the pyritous state, through vacuum breaker is set on extraction pipe, the wet COG adverse current that can prevent to extract out is to the coking stove; Consequently, can heat-treat coke oven gas reliably.As previously mentioned, in the past, it was difficult taking into account above-mentioned 2 technology, can't implement the thermal treatment of coke oven gas.

In addition; Under the situation of above-mentioned (3) record; When wetting bleeding of COG and when coming together in collecting tubule simultaneously from a plurality of coking stoves, no matter the open and-shut mode of the water-sealed valve of dry main side how, the wet COG of extraction can adverse current go into specific coking stove; People such as present inventor have found that for the first time this was not the problem of being known in the past, and characteristic of the present invention is to have proposed its solution.That is, be not only the generating capacity of assurance from the wet COG of each coking stove, also on extraction pipe, be provided with the vacuum breaker that prevents adverse current according to the pressure difference in coking stove and the collecting tubule.

Below; The characteristic of sluice valve to the situation of above-mentioned (4) record describes; At first; The 1st characteristic is, the sealing material of the granulated material of big variation as sluice valve can not take place physical properties in the TR from about normal temperature to 900 ℃ through using, and can guarantee the stopping property of the valve in the wide working range.Contrast with it, technological in the past sealing method is the situation of water-sealed valve for example, owing to can't water be maintained liquid phase under the high temperature, so can not be suitable for this method.

The 2nd characteristic of above-mentioned sluice valve is described below.

Sluice valve generally is according to desired function, and the mutually different material of combination uses between its each parts.When above-mentioned sluice valve uses in wide TR; Can produce thermal expansion difference between said each parts; So in the contact between these parts, the contact position between valve seat and spool for example, be difficult in wide TR mechanical workout in said cooperation be maintained equal state.In addition, under 900 ℃ high temperature during the use valve, owing to can't avoid because of long-term creep makes material deformation, so, also be difficult to the identical cooperation of long term maintenance even working temperature is constant.The structure of sluice valve in the past is through spool being fastened on the sealing of carrying out working fluid on the valve seat; If the cooperation of valve seat is changed so spool can take place; Then produce the slit between spool and the valve seat and make sealing become incomplete; Perhaps opposite, the contact force between spool and the valve seat becomes excessive, thereby makes the spool immobile problem that becomes.On the other hand, in this form,,, can avoid above-mentioned problem so there is no need to consider to cooperate owing to be to seal through spool is buried in the layer of higher, the thicker sealing material of mobility.

The 3rd characteristic of above-mentioned sluice valve is described below.

That is, in this form owing to use the sealing material that constitutes by more a large amount of granular solids, thus be not easy to receive for unavoidable with material that wet COG contacts, because of coking or the caused detrimentally affect of tar condensation cure to stopping property to material.Promptly; In this form; Even on the part on top layer sealing material, produced coking, the stirring of the sealing material that on-off action that also can be through spool etc. is produced makes separates out carbon and is scattered in rapidly in the layer, so can reduce the stopping property and the mobile influence that worsens of sealing material.In addition, in this form, bury continually in the sealing material, can obtain to seal the grinding effect of material, so can remove the dirt settling of spool face to spool through making spool.

The 4th characteristic of above-mentioned sluice valve is described below.

That is, through GALLIUM metal pure etc. is used to seal material, in this form, can in the awide temperature range of normal temperature to 900 roughly ℃, work, and, can realize sealing completely sluice valve.With regard to the valve of in the past sealed structure with metallic contact; The temperature province of the valve that can in above-mentioned awide temperature range, work beyond the specific temperature that valve seat and spool can contact; Might produce the slit at valve seat and valve core chamber owing to the thermal expansion rate variance between each parts, so can't guarantee reliable tightness.

The 5th characteristic of above-mentioned sluice valve is described below.

That is, in this form, because most of integrant of valve is disposed at (for example in the process furnace) in the heating atmosphere, so can reduce the temperature head between each parts of valve.The valve that makes high-temperature gas circulation in the past is through will being that the inboard remains high temperature with the contact site of high-temperature gas, and, the outside of valve is remained low temperature, guarantee the intensity and the operation property of valve.Under above-mentioned design premises, if heating unit is not set on the valve, then know from experience by the valve cooling through the High Temperature Gas of valve, so for example make when wetting the COG circulation, can't avoid tar to separate out internal surface in valve.In addition; Also can consider through avoiding at the set inside heating unit of valve from take the method for heat away through the high-temperature gas of valve; But this moment is because the inside of valve and the temperature head between the outside become big, so be difficult to the inside of valve likewise is controlled to be steady temperature.In addition, in above-mentioned method in the past, owing to can produce big temperature head between each parts of valve, so when use valve under 900 ℃ high temperature, also can occur producing big thermal stresses and the problem that significantly shortens the life-span of valve.In this form; Through valve being disposed in the heating atmosphere that is maintained at the roughly the same temperature of high-temperature gas through valve (for example in the process furnace); Can the temperature of whole valve be kept equally and constant, therefore can avoid the problem in the above-mentioned technology in the past.

The effect of invention

That kind of as above explaining; Form according to record in above-mentioned (1) of the present invention and (2); A kind of following dry distillation of coal gas HTFX (coke oven gas HTFX) can be provided: all gases reformation technology and the suitable possibility that becomes of sensible heat recovery technology of utilizing the sensible heat of dry distillation of coal gas (wet COG); Can dry distillation of coal gas (wet COG) be supplied to dry distillation of coal gas disposal device (coke oven gas treatment unit) being maintained under the pyritous state; And the dry distillation of coal gas (COG bleeds) that can prevent to extract out is to the adverse current of dry distillation of coal device (pit kiln).

Description of drawings

Fig. 1 is the synoptic diagram of pit kiln in the past.

Fig. 2 is the synoptic diagram of coke oven gas treatment facility in the past.

Fig. 3 is the synoptic diagram of the high temperature coke oven gas disposal equipment of an embodiment of the invention.

Fig. 4 is the figure of the valve that uses in the above-mentioned high temperature coke oven gas disposal equipment of expression, and is the synoptic diagram that the state of valve is opened in expression.

Fig. 5 is the figure of the valve that uses in the above-mentioned high temperature coke oven gas disposal equipment of expression, and is the synoptic diagram of the state of expression shut-off valve.

Embodiment

Following one side is with reference to accompanying drawing, and one side is elaborated to an embodiment of the invention.In addition, in present specification and accompanying drawing,, omit repeat specification to them to having the identical symbol of integrant mark of identical function in fact.

(high-temperature coking furnace gas HTFX)

＜device formation＞

Use Fig. 3 that the high-temperature coking furnace gas HTFX of this embodiment is described.In high-temperature coking furnace gas HTFX shown in Figure 3; For with each corresponding coking stove 21a～21c of each coking stove 21 in the past shown in Figure 1; Extraction pipe 26 and vacuum breaker 27 are set respectively, simultaneously, come together in collecting tubule 28 through their COG (the following COG that only is called sometimes) that will wet.Then, COG is supplied to the COG treatment unit 29 that is connected with this collecting tubule 28.Above-mentioned a series of element, be that extraction pipe 26, vacuum breaker 27, collecting tubule 28, COG treatment unit 29 are incorporated in the process furnace 33; When carrying out the reformation of COG; With temperature in the stove of process furnace 33 (heating atmosphere temperature) remain more than 700 ℃, more preferably more than 800 ℃, thereby prevent the condensing of tar in the pipe arrangement system.

Because the temperature of the COG that produces in each coking stove 21a～21c (the COG temperature takes place) is roughly below 1200 ℃, so the temperature in the process furnace 33 is preferably set to below 1200 ℃ so that can keep this generation COG temperature.In addition, in the most running time, the temperature of the COG of generation is below 900 ℃, so consider the thermotolerance of the device of the ventilation that is used for COG, is below 900 ℃ with temperature maintenance in the stove of the process furnace in this embodiment 33 preferably.At this moment, always measure the COG temperature that produces, when this temperature surpasses 900 ℃,, can block the supply of high temperature CO G to the device in its downstream side through closing vacuum breaker 27.

(optional position except the connection section of coking stove 21a～21c and collecting tubule 28) is provided with vacuum breaker 27 in the way of each extraction pipe 26.This vacuum breaker 27 opens and closes according to its pressure difference of going into side-go out between side.COG after COG treatment unit 29 is handled is suitably with being supplied to COG refining plant 32 or COG storing unit (not shown) after refrigerating unit 30 coolings.When the aeration resistance in the COG treatment unit 29 is big, also can attract cooled COG to guarantee required flow with gas blower 31.The device 30 that is cooled is cooled to the COG about normal temperature because the dryness after being in tar ingredients and being removed, so as gas blower 31, can use commercially available general gas blower or valve etc.In addition, refrigerating unit 30 can use commercially available washer etc.In addition, in the way of pipeline system, tornado dust collector suction cleaner such as (cyclone) can also be set suitably.

From the generating capacity that makes COG and the viewpoint of balanced composition, the kiln number of the coking stove 21a～21c that bleeds is preferably more than 3 kilns.The not special restriction of the peak of the kiln number of bleeding, if but the kiln number increase, then the length of COG collecting tubule is elongated, heating when COG supplies gas and the insulation efficient that becomes is low, so the kiln numerical example of per 1 stove pit kiln is as being set at below 100 kilns.

＜COG treatment unit＞

As COG treatment unit 29, for example can be suitable for the COG heat extraction and recovery device shown in COG reformer shown in the patent documentation 4 or the patent documentation 5.In the said apparatus, the COG temperature that is supplied to is preferably about 700 ℃ to 900 ℃～1200 ℃, therefore can preferably use the device of this embodiment.

＜extraction pipe, collecting tubule＞

Extraction pipe 26 and collecting tubule 28 can use the pipe of heat-resistance stainless steel system, Incoby nickel alloys system or heat-stable ceramic system.Temperature surpasses under 900 ℃ the situation in the stove in each coking stove 21a～21c, preferably uses materials such as heat-stable ceramic.In this embodiment; Owing to will the COG that bleed be remained more than 700 ℃; So condensing of tar do not taken place; But how much carbon that the COG thermolysis under the Yin Gaowen causes can not be avoided separating out of pipeline internal surface, so the viewpoint from preventing to stop up, the internal diameter of extraction pipe and collecting tubule is preferably more than the 100mm.In addition, if the pipe arrangement footpath is excessive, then can not between each coking stove 21a～21c, pipe arrangement be set, so the external diameter of extraction pipe is preferably less than the equispaced between each coking stove 21a～21c, for example less than 1m.The not special restriction of the peak of the caliber of collecting tubule, but under the situation of extremely big caliber, process furnace becomes huge and efficient is low, and therefore, diameter for example is preferably set to below the 3m.

＜process furnace＞

As process furnace 33, can use commercially available electric furnace or roasting kiln.Can above-mentioned all elements that will heat be accommodated in 1 process furnace 33, also can process furnace 33 be set individually respectively extraction pipe 26 and vacuum breaker 27, collecting tubule 28, COG treatment unit 29.In addition, also can on each extraction pipe 26 of each coking stove 21a～21c and vacuum breaker 27, process furnace 33 be set individually.

The flowing of＜COG＞

Among Fig. 3, when the COG that from each coking stove 21a～21c, extracts out was in appropriate condition, the vacuum breaker 27 of each extraction pipe 26 was opened respectively, and the COG that will wet is supplied to COG treatment unit 29 from coking stove 21a～21c.Here said appropriate condition is meant; At least the pressure of collecting tubule 28 sides is less than the pressure status of coking stove 21a～21c side; In addition; Of the back, when using sluice valve to be set in the function that can both open and close opportunity arbitrarily as vacuum breaker 27, COG is in the condition that the above condition of specified temperature also can be can be regarded as appropriate C OG.

COG temperature in each coking stove 21a～21c can use with in the past coking stove 21 in the identical oven thermometer of oven thermometer that possesses of standard measure.Be under the open mode at vacuum breaker 27, the water-sealed valve 22 of its coking stove 21a～21c can be opened, and also can close.Here, when water-sealed valve 22 when opening, the pressure adjustmenting mechanism of the sparging unit that preferred operations is not shown etc. so that COG from coking stove 21a～21c flow out to collecting tubule 28 and dry main 24 the two.

All vacuum breaker 27 be opened and all water-sealed valve 22 pent states under; Need only in coking stove 21a～21c and continue to produce COG; Then for a long time on average; The COG that produces among each coking stove 21a～21c all is discarded to collecting tubule 28, so adverse current can not take place on average for a long time.Promptly; On average; Pressure difference with between the coking stove-collecting tubule of ［ coking stove 21a～21c internal pressure ］-［ collecting tubule 28 internal pressures ］ definition is a positive number, and, this pressure difference be with each coking stove 21a～21c in the value of COG generating capacity proportional (being not limited to ratio 1 time).But from instantaneous, the COG in coking stove 21a～21c produces speed and non-constant, also big change can take place in the short period of time.As this change essential factor, for example can enumerate out: when part distortion, fracture took place heated sintering coke briquette, in moment, the COG generating capacity in its coking stove 21a～21c increased severely, and the interior pressure of collecting tubule 28 also rises rapidly together with it.Therefore, even above-mentioned vacuum breaker and water-sealed valve impose a condition, also might make the pressure difference between coking stove-collecting tubule in specific coking stove 21a～21c, become negative value, the adverse current of COG of bleeding astatically to coking stove 21a～21c.

In addition, when closing specific vacuum breaker 27, in corresponding with it coking stove 21a～21c, produced under the situation of COG, must open water-sealed valve 22 from coking stove 21a～21c so that the COG that is produced discharges.

When a plurality of vacuum breaker 27 are opened; When the water-sealed valve 22 on a plurality of coking stoves among corresponding with it coking stove 21a～21c is opened (this be produce the situation etc. that the COG amount surpasses the processing power of COG treatment unit 29 take place down), the COG generating capacity among each coking stove 21a～21c and the relation of its pressure are unpredictable.That is, having produced to greater amount the interior pressure of coking stove 21a～21c of COG may not be high.This be because: the pit kiln furnace pressure power setting technique based on the sparging unit in the technology in the past can not carry out the furnace pressure adjustment under the high precision, so between coking stove 21a～21c, just possibly produce the cause of big pressure difference originally.Consequently; Become than the pressure of collecting tubule 28, promptly also the generation of the situation of low pressure is inevitable than their mean pressure among each coking stove 21a～21c; Only otherwise vacuum breaker 27 is suitably worked, the phenomenon of COG of just might stably bleeding towards coking stove 21a～21c adverse current.Therefore, shown in the patent documentation 2, only use the opening and closing operations of the stopping valve that carries out according to the COG generating capacity in the coking stove 21a～21c adverse current of COG that can not prevent to bleed to coking stove 21a～21c.

Can know from above viewpoint, the valve that is provided with on the extraction pipe 26 have at least according to front and back the function of the vacuum breaker that opens and closes of pressure difference be necessary for high-temperature coking furnace gas HTFX.This is the application inventor's the item that the result understood fully first that studies in great detail.

(vacuum breaker)

The formation of＜vacuum breaker＞

Vacuum breaker (the following sluice valve that is also referred to as sometimes) 27 is so long as can tolerate hot environment in the process furnace 33 (more than 700 ℃; More preferably more than 800 ℃); Can not separate out obstruction work because of the carbon that coking causes; And, can prevent the vacuum breaker of withdrawing gas according to the pressure difference of going into side-go out between side of vacuum breaker 27 to the adverse current of coking stove 21a～21c, then whatsoever the vacuum breaker of form can adopt.

But; When adopt general that use, with spring loaded spool is pressed on the valve seat; When the working gas following current; When making the vacuum breaker of form of crack extension of spool-valve base chamber through the mobile dynamic pressure, in design, need to consider especially, so that just can make the crack extension of spool-valve base chamber with small power.Its reason is that when using wet COG as working gas, for the obstruction that prevents that coking from causing, the internal diameter of extraction pipe and vacuum breaker generally has to set greatlyyer, is inevitable so the dynamic pressure of working gas becomes small usually.In addition, can also keep elastic spring material to about at least 900 ℃ also is not easy to find.

Say more generally; Can be as shown in Figure 3 to the vacuum breaker 27 that wet COG is suitable for; Also can set vacuum breaker 27 for sluice valve; Each furnace pressure meter 34, collecting tubule pressure warning unit 35 and vacuum breaker gear 36 are set, and said each furnace pressure meter 34 is arranged at from coking stove 21a～21c between the influx of these vacuum breaker 27, and said collecting tubule pressure warning unit 35 is arranged between spout to the collecting tubule 28 of vacuum breaker 27.When adopting the formation of this vacuum breaker 27; Measured value in the measured value of each furnace pressure meter 34 and the collecting tubule pressure warning unit 35 is input to vacuum breaker gear 36; Calculate their pressure reduction; When the measured value of collecting tubule pressure warning unit 35 during, detect in extraction pipe 26, adverse current having taken place greater than the measured value of furnace pressure meter 34.Then, when detecting adverse current,, can prevent that withdrawing gas is to coking stove 21a～21c adverse current through close the instruction of this sluice valve 27 to the sluice valve that is connected with the extraction pipe that adverse current has taken place 26 27 outputs.

In addition, in the situation of above-mentioned formation, do not detect at vacuum breaker gear 36 under the state of adverse current, the valve 27 that can open the sluices also can be set at closing condition because of other operational reason, so can increase the option of utilization.Here said other operational reason is meant, for example when the coking stove 21a～21c corresponding to each vacuum breaker 27 is in the atmosphere open mode, during this period, what no matter adverse current detected has or not, and can vacuum breaker 27 cut out always.

Here, the valve that uses as vacuum breaker 27 is not regulating valves such as baffle plate, and will be defined as sluice valve, and it the reasons are as follows.As previously mentioned; When COG is wet in operation; Because separating out/adhere to more or less and can't avoiding of tar or carbon becomes prerequisite so the slit is set always between spool and valve seat, but for regulating valves such as baffle plates; For fear of because of above-mentioned tar or carbon separate out/adhere to the action that hinders spool, have to set wavelength width of a slit bigger.On the other hand, as previously mentioned, the extraction pipe 26 that wet COG is passed through and the internal diameter of vacuum breaker 27 must be set fully greatly.Therefore, the area in the slit of baffle plate (circumference of ≈ wavelength width of a slit * pipe) is difficult to set fully for a short time with respect to the flow of wet COG, can not fully improve the flow velocity of the wet COG in the slit through baffle plate.This be because: the principle of baffle plate is to come dominant discharge through the pressure-losses that speedup produced of the working gas at baffle plate slit place; So under the flow condition of above-mentioned wet COG; Baffle plate can not work as flow adjuster, therefore can not be applicable to vacuum breaker 27.Contrast with it if sluice valve even the dynamic pressure of wet COG is lower, also can stop it to flow, therefore can be applicable to vacuum breaker 27 suitably.

In the situation of the vacuum breaker 27 of above-mentioned structure, the tectosome of valve is more than 900 ℃ the time, and it is big that the restriction of the material that can be suitable for becomes.On the other hand, wet COG is shorter through the time ratio of vacuum breaker 27, and, if the temperature of vacuum breaker 27 be about 700 ℃ more than like this than higher temperature, then general in vacuum breaker 27 medial temperature of COG big change can not take place.Therefore, when in the process furnace more than 900 ℃ 33, vacuum breaker 27 being set, also can be with vacuum breaker 27 cooling, maintain to the part of major general's valve constitution body and to be lower than 900 ℃.As means at process furnace 33 internal cooling valves, can be at the arranged outside gas cooling chuck of valve body, the gas that outside process furnace 33, imports is circulated therein and carry out the cooling of valve.In addition, in the situation of the vacuum breaker 27 of the drive unit of stating in the use,, be lower than 700 ℃ so also can only this part be cooled to because cylinder drive units such as (gas cylinder) itself does not contact with wet COG.In addition, also can only drive unit be arranged at the outside of process furnace 33, use the conduction mechanism (connecting rod etc.) of the wall that connects process furnace 33 to drive the spool in the process furnace 33.That is, vacuum breaker 27 is arranged at process furnace 33 temperature interior and that maintain more than 700 ℃ is meant, be arranged at process furnace 33 temperature interior and that maintain more than 700 ℃ to major general's valve body and get final product.

Contrast with it; If vacuum breaker 27 is not arranged in the process furnace 33 (heating unit); Be incubated material etc. and only around vacuum breaker 27, be provided with; Even then the COG through vacuum breaker 27 is more than 700 ℃,, be difficult to also prevent that precipitates such as solid (or liquid) tar from becoming significantly, being lower than the generation in 700 ℃ zone at vacuum breaker 27 and contact part COG.Its reason is that under the situation of above-mentioned structure, the heating source of vacuum breaker 27 only is the heat from the COG conduction.Usually, in the operation of the pit kiln that carries out batch production, (that is, can extract out) COG of generation usually changes on a small quantity or stops.Therefore, strictly be incubated in any case, the heat that the time per unit of vacuum breaker 27 all can take place to be supplied to by COG becomes 0 situation basically.At this moment, the valve body of vacuum breaker 27 is owing to be the side to outside heat release, so the whole temperature of valve body descends, the ventilation position also might produce and be lower than 700 ℃ zone.When the COG contact part in the valve has produced when being lower than 700 ℃ low-temperature section, even do not allow the medial temperature of COG to decline to a great extent, near the COG this low-temperature section also might drop to and be lower than 700 ℃ at least, produces solid or liquid tar and is attached to low-temperature section.Resultant problem is that at this low-temperature section, solid or liquid tar dirt settling are optionally grown and stopped up stream in the valve.On the other hand, as this embodiment, in the time of in valve body being arranged at the process furnace 33 that is maintained at more than 700 ℃,, can both always the whole zone of COG contact part in the valve be remained on more than 700 ℃ regardless of the COG flow of ventilating.

＜pressure warning unit＞

As collecting tubule pressure warning unit 35 and furnace pressure meter 34, for example can use commercially available weather gauge or diaphragm pressure gauge.When using weather gauge, be not to let in the stove or the gas in the pipe directly contacts with working fluid, but through getting involved adiabatic fluid such as inactive gas indirectly, COG also can measure pressure even pyritous wets.

In addition, if collecting tubule pressure warning unit 35 is being set at negative pressure always, and the stove internal pressure of the coking stove 21a～21c that will bleed is set under the prerequisite of malleation always, then as furnace pressure meter 34, can adopt easy pressure detection means.For example the part of coking stove 21a～21c is opened (for example opening the slit of the upper cover part of upcast 25) to extraneous air always, and obtain the gas flow direction here with the weathervane method.Then; Can use the easy detection means as the pressure in coking stove 21a～21c such as following method; Said method is: when gas flows out to atmosphere in coking stove 21a～21c; In coking stove 21a～21c is malleation, is in the other direction if flow, and is negative pressure in coking stove 21a～21c then.

The structure of＜sluice valve＞

Use Fig. 4 and Fig. 5 that the sluice valve as vacuum breaker 27 is described below.In addition, Fig. 4 representes the open mode of valve, and Fig. 5 representes the closing condition of valve.

At first, as shown in Figure 4, when valve is that the opening 2a of spool 2 is in than the surperficial 5a of sealing material 5 more during the open mode of top, the pyritous working gas flows in the valve body 1 from gas inflow pipe 3, flows out from spout 4.Position with spool 2 at this moment is called the spool hoisting position below.In addition, gas inflow pipe 3 be said extraction pipe 26 with the part that coking stove 21a～the 21c side is connected, spout 4 is parts that are connected with collecting tubule 28 sides of said extraction pipe 26.

On the other hand; As shown in Figure 5; When valve is closing condition; Utilization comprise spool 2 opening 2a the lower end from above bury the spool 2 in the sealing material 5 downwards, be spaced in the valve body 1 for the space 19 of a side that gas inflow pipe 3 is arranged with except that the space 20 of the gas outlet pipe side it.Consequently, the pyritous working gas is blocked from the circulation of gas inflow pipe 3 to gas outlet pipe 4.Position with spool 2 at this moment is called the spool lowering position below.The working gas of trace might circulate through the slit of sealing material 5, but buries the degree of depth when abundant in sealing in the material 5 when spool 2, if use the abundant big sealing material 5 of aeration resistance, then can realize substantial air seal.Spool 2 is sealing burying the degree of depth and for example can be set at 10mm～1m in the material 5.When the amount of burying was more shallow than above-mentioned value, the sealing property of sealing material 5 was not enough, on the other hand, during the degree of depth more than the amount of burying is above-mentioned value, compared the device too costliness that becomes with the sealing property that can realize.Through the position of adjustment stopper 18, can this spool 2 be set at the desired degree of depth in the degree of depth that buries of sealing in the material 5, said stopper 18 is fixed the lower end position when making spool 2 declines after the opening 3a of the upper end of gas inflow pipe 3 contact.

In order spool 2 to be moved, make spool lifting device 8 work that are connected with spool 2 between spool hoisting position and spool lowering position.In order to keep the airtight of valve body 1, between spool 2 and valve body 1, corrugated tube 14 is set, can the influence of the rate of travel between spool 2 and the valve body 1 be absorbed in this.

＜valve body＞

Valve body 1 is arranged in the pyritous process furnace 33.The height of valve body 1 for example can be set at 100mm～4m.The bed thickness of sealing material 5 for example can be set at 10mm～1m.Gas inflow pipe 3 for example can be set at 10mm～300mm with the opening footpath of gas outlet pipe 4 in valve body 1.

＜spool lifting device＞

When being arranged at spool lifting device 8 outside the process furnace 33, can use can up and-down movement commercially available driving mechanism.For example can use cylinder, hydro-cylinder, wheel tooth vertically hung scroll puopulsion unit, ball screw puopulsion unit or linear motor.Also can stable on heating driving mechanism be used for spool lifting device 8, it is arranged in the process furnace 33, realize the miniaturized of equipment.The method of the lifting position of adjustment spool 2 can be with manually carrying out, and also can be provided with in addition apart from meter or ergometer and gear to control automatically.The stroke of spool lifting device 8 for example can be set at 20mm～2m.

The material of＜structure material＞

When furnace temperature being defined as below 900 ℃, as long as the devices of configuration have needed intensity, rigidity, weather resistance under the hot environment from about the normal temperature to 900 ℃ in the process furnace 33, then which type of material can use.For example; Corrugated tube 14 as the parts that are out of shape; Can use heat-resistance stainless steel or Inconel(nickel alloys) and Hasiteluoyi hastelloy metals such as Incoby nickel alloys such as (hastelloy); Relevant to the parts it, except that above-mentioned materials, can also use graphite, carbon composite, aluminum oxide, quicklime, Natural manganese dioxide, silit or silicon nitride etc.In addition, when using the low material of scale resistance such as graphite,, just can use these materials through with being maintained non-oxidizing atmosphere, for example nitrogen atmosphere in the process furnace 33.In addition, when might the furnace temperature in the process furnace 33 being set at when surpassing 900 ℃ value, the material as the structure material preferably uses materials such as heat-stable ceramic.

When using GALLIUM metal pure in the sealing material 5, and alloy might be generated between the metallic substance,, structure material that has used above-mentioned various potteries or the structure material that on metallic substance, has covered above-mentioned various ceramic materials can be adopted so connect in the liquid portion at GALLIUM metal pure.

＜sealing material＞

As sealing material 5; So long as under the high temperature of normal temperature to 900 ℃～about 1200 ℃, have the intensity that can tolerate fluidization; And be can not take place and the chemical reaction of working gas, thermolysis, the sintering of self, the granulous material of phase transformation, then whatsoever the material of appearance can be used.

When sealing material 5 uses plastochondrias, for example can use with a kind of in aluminum oxide, zirconium white, titanium oxide, silicon nitride, the silit or the material that is combined as main body more than two kinds.Above-mentioned substance is because industry is gone up easily obtains, and stable in the TR of normal temperature to 900 ℃～1200 ℃, reactive low with wet COG, and then coking property is also low in this TR so the flowability of plastochondria seldom suffers damage, thereby is preferred.Be other material, the situation of for example silica sand,,, be not suitable for as sealing material 5 so particle destroys easily owing in this TR, can undergo phase transition.In addition, when using the soda glass particle because in this TR, might soften, sintering, so can't guarantee the flowability of plastochondria, might hinder the insertion of spool 2 in sealing material 5, so be not suitable for as sealing material 5.

Here; Aforementioned body is meant that above-mentioned plastochondria accounts for more than the 50 quality %; The character of above-mentioned plastochondria, particularly stable in the TR of normal temperature to 900 ℃～1200 ℃, with the reactive low of wet COG and then in the scope that the yet low advantage of this TR coking property does not receive significantly to damage, the impurity of trace or additive can be used as particle, perhaps the composition of the individual particles of above-mentioned plastochondria contains in above-mentioned plastochondria.The plastochondria of the SP 1 of the scope below for example, in above-mentioned plastochondria, can adding for example about 5 quality %.SP 1 is because at high temperature solid lubrication property is high, so through in above-mentioned plastochondria, adding on a small quantity, just can expect to improve the effect of the flowability of plastochondria.But,, destroy easily because the physical strength of SP 1 plastochondria is lower, thus the preferred plastochondria scope shown in being difficult to below the long term maintenance, so the heavy addition existing problems.In addition; As above-mentioned fluidic particle; Not necessarily must use highly purified plastochondria, for example, even contain silicon oxide, plastochondria that the particle be made up of the alumina silica of mulliteization constitutes; So long as, just can use at the proportional range that contains silicon-dioxide (for example being below the 30 quality %) of the character of damaging above-mentioned plastochondria not significantly.

The preferred diameter of particle diameter of sealing material 5 is 10 μ m～500 μ m.When less than this particle size range, in the valve body 1 when the on-off action of spool 2, follow spool 2 that rolling of plastochondria can be taken place, plastochondria can flow out from gas outlet pipe 4 with working gas, thereby not preferred.In addition, when the particle diameter of plastochondria during greater than this scope, the stopping property of plastochondria extremely worsens, thereby not preferred.The shape of sealing material 5 is that preferred most plastochondria is spherical for roughly.Roughly sphere is meant; The sphericity of each particle of plastochondria (with the ultimate range of the radial direction of the surperficial circumscribed minimum sphere of particle and particle surface) is the roughly particle below 20% of particle radii; And, so long as there is not the shape in sharp-pointed bight to get final product.This particle is owing to can improve the filling ratio when range upon range of, so from guaranteeing the viewpoint of stopping property, be suitable as sealing material 5; In addition; Because mobile good, institute also is to help as sealing material 5 so that the resistance that spool 2 buries when sealing material 5 is little in this.

Roughly the spheric particle can use formation such as rotating comminution granulation, spray drying granulation method or welding process, also can use commercially available article.On the other hand, for example the particle by the crush method manufacturing has sharp-pointed position owing to particle surface, so be not suitable for as sealing material 5.When having used the plastochondria of preferred particle; For example under the valve closing state; Even be applied in the for example pressure reduction of 100Pa between gas inflow pipe side space 19 and the gas outlet pipe side space 20; Also can the flow velocity of the working gas that circulates through sealing material layer be set at 1mm/ below second, can guarantee the high stopping property of valve.

As sealing material 5, can use with the liquid metal of GALLIUM metal pure as main body.Because the fusing point of GALLIUM metal pure is 29 ℃, boiling point is more than 2000 ℃, so be maintained more than the above-mentioned fusing point through the furnace temperature with process furnace 33, sealing material 5 can be kept liquid phase in working gas temperature is the scope of normal temperature to 1200 ℃.For example because the GALLIUM metal pure vapour pressure under 900 ℃ is extremely low; Below about 0.1Pa; So can avoid the issuable various unfavorable conditions of evaporation, for example can avoid sealing material 5 and in the equipment of the downstream side of vacuum breaker 27, form the dirt settling that solidifies because of sealing material 5.

Here; Aforementioned body is meant that the GALLIUM metal pure in the liquid metal accounts for more than the 50 quality %; Low temperature fusing point in the character of damaging above-mentioned GALLIUM metal pure not significantly, below particularly having about normal temperature also has in the scope that the advantage of the fully high boiling point of the service temperature of specific humidity COG do not receive significantly to damage, and the impurity or the additive of trace can contain in GALLIUM metal pure.For example, contain the liquid metal of GALLIUM metal pure 68.5 quality %, indium 21.5 quality % and tin 10 quality %, gallium accounts for major part in the composition; And; Fusing point is-19 ℃, and boiling point is more than 1300 ℃, owing to significantly do not damage the character of GALLIUM metal pure; So can be included in said in this embodiment is in the liquid metal of main body with the GALLIUM metal pure.In addition; As long as can contain the materials such as regeneration gallium of impurity with the degree of the about 1 quality % of total amount and also be the condition of the fully high boiling point of the service temperature of cryogenic fusing point and specific humidity COG below satisfying about normal temperature, just being included in said in this embodiment is in the liquid metal of main body with the GALLIUM metal pure.

When sealing material 5 used GALLIUM metal pures, for the working gas of oxidisability, liquid-gallium began oxidation from the surface and generates the hard top layer of gallium oxide, might hinder the on-off action of valve, and the problem of the loss of GALLIUM metal pure takes place simultaneously in addition.In addition, GALLIUM metal pure expands when solidifying, so if when not the using of valve from around cool off valve equably; Then can produce and solidify from the surface of GALLIUM metal pure; Solidify after being enclosed in inner liquid, at this moment, might produce strong pressure and destroy container.

For fear of the problems referred to above, can on GALLIUM metal pure, load with a kind of in aluminum oxide, zirconium white, titanium oxide, silicon nitride, the silit or the plastochondria that is combined as main body more than two kinds as sealing material 5.The density of above-mentioned plastochondria is all less than GALLIUM metal pure, so can on GALLIUM metal pure, form stable layer.When loading plastochondria, if violent stirring, then plastochondria can enter into GALLIUM metal pure, so plastochondria should be statically placed on the GALLIUM metal pure.Through above-mentioned plastochondria is loaded on the GALLIUM metal pure, can hinders the lip-deep ventilation of GALLIUM metal pure and suppress the oxidation of GALLIUM metal pure.In addition, the plastochondria layer on the GALLIUM metal pure works as adiabatic material, when the cooling valve, can the GALLIUM metal pure surface be incubated, so the wall of container beyond solidifying from the surface begins to take place last GALLIUM metal pure surface solidification.Therefore, can avoid the above-mentioned damaged problem of container.In addition, the plastochondria on the GALLIUM metal pure can freely separate each other, so, can dispose plastochondria according to the mode of passing through of the plastochondria layer that does not hinder spool 2.

The thickness of plastochondria layer (sealing material 5) is preferably the scope of 1mm～100mm.When the plastochondria layer was thinner than this scope, air permeability was high, and heat retaining property is also low, so the effect of plastochondria layer significantly reduces.When the plastochondria layer was thicker than this scope, the resistance when spool 2 passes through the plastochondria layer became big, might hinder the switching of valve, thereby not preferred.The particle dia of plastochondria is preferably 10 μ m～500 μ m.Particle is than this scope hour, dispersing of particle taken place easily in that valve body 1 is inner, thereby not preferred.In addition, when particle was bigger than this scope, the ability that hinders air permeability extremely descended, thereby not preferred.

In addition, seal the kind that material 5 is not restricted to narrate in this embodiment.For example highly purified Tungsten oxide 99.999 at high temperature is the high material of stability, so as long as can make in large quantities with the particle diameter of regulation, just can be applicable to the sealing material among the present invention.

That kind as described above, the main points of this embodiment are described below.

(1) promptly; The coke oven gas HTFX of this embodiment (dry distillation of coal gas HTFX) is through under 700 ℃～1200 ℃ inflow temperature, the wet COG (coke oven gas, dry distillation of coal gas) that from a plurality of coking stoves (dry distillation of coal device) 21a～21c, extracts out being heat-treated, obtaining desired material or energy.And this coke oven gas HTFX possesses: at the extraction pipe 26 of the last setting of each coking stove (dry distillation of coal device) 21a～21c; The vacuum breaker 27 that on these extraction pipes 26, is provided with respectively; The collecting tubule 28 that has connected each extraction pipe 26; And the COG treatment unit that is connected with this collecting tubule 28 (dry distillation of coal gas disposal device) 29.And then each extraction pipe 26, each vacuum breaker 27, collecting tubule 28 and COG treatment unit (dry distillation of coal gas disposal device) 29 is arranged in 700 ℃～1200 ℃ the heating atmosphere that forms in the process furnace 33.And wet COG (dry distillation of coal gas) is according to the sequential flow mistake of each coking stove (dry distillation of coal device) 21a～21c, each extraction pipe 26, each vacuum breaker 27, collecting tubule 28 and COG treatment unit (dry distillation of coal gas disposal device) 29.

(2) and then, this coke oven gas HTFX further possesses: furnace pressure meter 34, it is separately positioned on from coking stove 21a～21c between the inlet of each vacuum breaker 27, is used to measure the 1st pressure in each coking stove 21a～21c; Collecting tubule pressure warning unit 35, it is arranged on from being exported between the collecting tubule 28 of each vacuum breaker 27, is used to measure the 2nd pressure in the collecting tubule 28; And vacuum breaker gear 36; It imports said the 1st pressure and said the 2nd pressure; The pressure reduction of calculating them is to detect the generation of the adverse current in each extraction pipe 26; And, when among each extraction pipe 26c the extraction pipe 26 of the adverse current that coke oven gas has taken place being arranged, close the vacuum breaker (sluice valve) 27 that is provided with on this extraction pipe 26.

(3) and then, in this coke oven gas HTFX, each vacuum breaker (sluice valve) 27 possesses respectively: valve body 1; Sealing material 5, it is arranged at the bottom in this valve body 1, in the TR of normal temperature to 900 ℃, have stable on heating; Gas inflow pipe 3, it is according to connecting valve body 1 and sealing material 5 in the inside of valve body 1 and in the mode than the surperficial 5a of the sealing material 5 internal space A1 inner opening above more, and the coke oven gas from each coking stove 21a～21c is flowed into; Gas outlet pipe 4, it is the A1 inner opening in said internal space, and coke oven gas is discharged to COG treatment unit (coke oven gas treatment unit, dry distillation of coal gas disposal device) 29 from said internal space A1; Spool 2; It is configured between off-position and open position, freely move; Said off-position be under the state of the opening 3a of blanketing gas inflow pipe 3 at least its peristome 2a bury 5 position in the sealing material, said open position is the position of extracting peristome 2a out from sealing material 5; And spool lifting device (spool running gear) 8, it moves this spool 2 between said off-position and said open position.

More than, preferred embodiment specify of the present invention with reference to accompanying drawing, but the present invention is not only limited to above-mentioned example.So long as have the people of the common knowledge of the affiliated technical field of the present invention, just can in the category of the technological thought that claims are put down in writing, expect that various changes examples or correction are routine certainly, these also belong to technical scope of the present invention certainly.

Utilizability on the industry

According to the present invention, can provide a kind of COG that will wet to be supplied to the coke oven gas treatment unit under the pyritous state being maintained at, and high temperature dry distillation of coal gas HTFX and the high-temperature coking furnace gas HTFX of COG to the adverse current of pit kiln that can prevent to bleed.

Nomenclature

1: valve body

2: spool

3: the gas inflow pipe

4: the gas outlet pipe

5: the sealing material

7: valve body

8: the spool lifting device

9: the downstream side main line

14: corrugated tube

16: the furnace wall

18: lid

19: the space of inflow pipe side

20: the space of outlet pipe side

21: the coking stove

22: water-sealed valve

23: sparging unit

24: dry main

25: upcast

26: extraction pipe

27: vacuum breaker

28: collecting tubule

The 29:COG treatment unit

30: refrigerating unit

31: gas blower

The 32:COG refining plant

33: process furnace

34: the pit kiln inner gauge

35: the collecting tubule pressure warning unit

36: gear

37: stopping valve

38: hot air generator

39: hot-blast conduit

Claims (4)

1. dry distillation of coal gas HTFX, it is through under 700 ℃～1200 ℃ inflow temperature, the dry distillation of coal gas of from a plurality of dry distillation of coal devices, extracting out being heat-treated, carbonaceous solids is carried out pyrogenous equipment, it is characterized in that it possesses:

The extraction pipe that on each said dry distillation of coal device, is provided with;

The vacuum breaker that on these extraction pipes, is provided with respectively;

The collecting tubule that has connected said each extraction pipe; And

The dry distillation of coal gas disposal device that is connected with said collecting tubule,

Wherein, said each extraction pipe, said each vacuum breaker, said collecting tubule and said dry distillation of coal gas disposal device are arranged in 700 ℃～1200 ℃ the heating atmosphere,

Said dry distillation of coal gas is according to the sequential flow mistake of said each dry distillation of coal device, said each extraction pipe, said each vacuum breaker, said collecting tubule and said dry distillation of coal gas disposal device.

2. coke oven gas HTFX, it is the equipment of under 700 ℃～1200 ℃ inflow temperature, the coke oven gas of from a plurality of coking stoves, extracting out being heat-treated, and it is characterized in that it possesses:

The extraction pipe that on each said coking stove, is provided with;

The vacuum breaker that on these extraction pipes, is provided with respectively;

The collecting tubule that has connected said each extraction pipe; And

The coke oven gas treatment unit that is connected with said collecting tubule,

Wherein, said each extraction pipe, said each vacuum breaker, said collecting tubule and said coke oven gas treatment unit are arranged in 700 ℃～1200 ℃ the heating atmosphere,

Said coke oven gas is according to the sequential flow mistake of said each coking stove, said each extraction pipe, said each vacuum breaker, said collecting tubule and said coke oven gas treatment unit.

3. coke oven gas HTFX according to claim 2 is characterized in that it further possesses:

The furnace pressure meter, it is separately positioned on between said each coking stove to the inlet of said each vacuum breaker, is used to measure the 1st pressure in said each coking stove;

The collecting tubule pressure warning unit, it is arranged on between the said collecting tubule of being exported to of said each vacuum breaker, is used to measure the 2nd pressure in the said collecting tubule; And

The vacuum breaker gear; Its pressure reduction of calculating said the 1st pressure and said the 2nd pressure is to detect the generation of the adverse current in said each extraction pipe; And, when in said each extraction pipe the extraction pipe of the adverse current that said coke oven gas has taken place being arranged, close the said vacuum breaker that is provided with on this extraction pipe.

4. coke oven gas HTFX according to claim 3 is characterized in that, said each vacuum breaker possesses respectively:

Valve body;

The sealing material, it is arranged at the intravital bottom of this valve, in the TR of normal temperature to 900 ℃, has thermotolerance;

The gas inflow pipe, it is according to connecting said valve body and said sealing material in the inside of said valve body and in the mode than the surface of the said sealing material internal space inner opening above more, and the said coke oven gas from said each coking stove is flowed into;

The gas outlet pipe, it is inner opening in said internal space, and said coke oven gas is discharged to said coke oven gas treatment unit from said internal space through said collecting tubule;

Spool; It is configured between off-position and open position, freely move; Said off-position be under the state of the opening that covers said gas inflow pipe at least its peristome bury the position in said sealing material, said open position is the position of extracting said peristome out from said sealing material; And

The spool running gear, it moves said spool between said off-position and said open position.

Images