CN102417834A - System and technology for producing fixed bed gas and fully recovering heat - Google Patents
System and technology for producing fixed bed gas and fully recovering heat Download PDFInfo
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- CN102417834A CN102417834A CN2011103167826A CN201110316782A CN102417834A CN 102417834 A CN102417834 A CN 102417834A CN 2011103167826 A CN2011103167826 A CN 2011103167826A CN 201110316782 A CN201110316782 A CN 201110316782A CN 102417834 A CN102417834 A CN 102417834A
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- 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
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Abstract
The invention discloses a system and a technology for producing a fixed bed gas and fully recovering heat. The system which comprises a total air tube, a total low pressure steam tube, a gas stove, a residual heat boiler, a gas washing tower, a deduster and a dry water seal is characterized in that: one outlet end of the total air tube is communicated with the bottom of the gas stove through a primary air valve, and the other outlet end of the total air tube is communicated with the inlet end of an upward blowing gas inlet tube through an upward nitrogen blowing air valve; a total steam valve and a steam triple valve are arranged on the total low pressure steam tube in order; a first outlet of the steam triple valve is connected with the inlet end of the upward blowing gas inlet tube, and a second outlet of the steam triple valve is connected with an upper gas channel; the outlet tube of the upward blowing gas inlet tube is communicated with the bottom of the gas stove; a gas outlet at the top of the gas stove is communicated with the gas inlet of the deduster through the upper gas channel; the gas outlet of the deduster, which is communicated with a blowing air concentration recovering device through a blowing air recovering valve and is communicated with a chimney through a chimney valve, is communicated with the inlet end of the dry water seal through an upward blowing gas valve; and the residual heat boiler is a combination heat tube boiler. According to the invention, heat in the gas production process can be completely recovered, so energy saving, environmental protection, safety and reliability are realized.
Description
Technical field
The present invention relates to the gas preparation field, particularly relate to and a kind ofly use the full recovery system that fixed bed coal gas producer intermittent gasification technology produces virgin gas production such as synthetic ammonia, methyl alcohol and heat and reclaim technology.
Background technology
In the production process of coal gas, gas furnace in a working cycle, be divided into blowing, on blow, blow down, blow on the secondary, air blows off five stages.
Existing gas prodn system is as shown in Figure 1, and technology is following:
The blowing stage: air gets into gas furnace from air main 11 through an air-valve 1 through the gas blower pressurization, and the carbon reaction generates carbon monoxide and carbonic acid gas in airborne oxygen and the stove, and liberated heat is stored in the carbon-coating, for the system solid/liquid/gas reactions provides heat.Blowing air is through the combustion chamber, and the solid particulate of taking out of obtains sedimentation, and gas gets into waste heat boilers through last blowpipe line 12, with soft water heat exchange in the boiler after chimney valve 9 and chimney emptying.Blowing air staple except that nitrogen is a carbonic acid gas; Produce a small amount of carbon monoxide simultaneously; For making full use of the reaction heat of carbon monoxide, in the combustion chamber, allocate secondary air (wind) into through pressure lock 7, carbon monoxide is burnt away emit heat to be stored in the fire-resistant checker brick in combustion chamber; Gas furnace system gas is removed in the steam preheating through the combustion chamber earlier again when treating down blowing gas.
Flow process: air from air main → one No. time air-valve → gas furnace → combustion chamber → go up blowpipe line → waste heat boiler → chimney valve → chimney
On blow the stage: after the blowing; Fuel bed is accumulated a large amount of heats; LP steam from LP steam house steward 10 through steam main valve 5, steam T-valve 6 and air admission gas furnace bottom; Pyrocarbon reaction in steam and the stove generates carbon monoxide, hydrogen or carbonic acid gas, hydrogen, is the principal reaction of producing coal gas.The purpose that this stage adds air is in order to regulate (CO+H in the syngas for synthetic ammonia
2)/N
2=3.1-3.2, promptly hydrogen nitrogen ratio so claim to add the nitrogen air, adds air in addition and can improve gasification layer temperature.The sedimentation in the combustion chamber of coal gas of high temperature entrained solid particle, gas reclaims sensible heat after after coal gas T-valve 8 advances the preliminary washing of gas washing case, go scrubber tower further washing and cooling at waste heat boiler.
Flow process: steam is from steam manifold → steam main valve → steam T-valve
Air is from air main → nitrogen air main valve 2 → last nitrogen flushing pressure lock 3 " → gas furnace → combustion chamber → upward blowpipe line → waste heat boiler → coal gas T-valve 8 → gas washing case → scrubber tower → gas main is gone into gas holder
Under blow the stage: if continue blowing and on blow over journey, the gasification layer moves on can be gradually in the fuel, the gasification layer can be more and more thinner, the purpose of following blowing gas be for gasification layer temperature and position stability in necessarily zone and scope.
LP steam from LP steam house steward 10 through steam main valve 5, steam T-valve 6 with add the nitrogen air through getting into the combustion chamber; Steam gets into the gas furnace top through last air flue again; Steam reacts with carbon from top to bottom; The coal gas warp that generates blowpipe line 13, coal gas T-valve 8 is down gone into the gas washing case, and coal gas goes to go into gas holder after further washing of scrubber tower, dedusting, the cooling again.
Flow process: steam is from steam manifold → steam main valve → steam T-valve
Air is from air main → nitrogen air main valve 2 → following nitrogen flushing pressure lock 4 " → combustion chamber → gas furnace → following blowpipe line → coal gas T-valve → gas washing case → scrubber tower → gas main goes into gas holder
Blow on the secondary: behind the following blowing bundle, the blowpipe line all was a coal gas under the gas furnace bottom reached, and transfer blowing to and cause air and coal gas to meet and blast probably this moment.For making the air that gets into down from stove, blow not only coal gas but also the production part coal gas under the emptying stove, the same stage flow process of blowing of flow process on carrying out once more through a safety condition being arranged during the space under the stove.
Air blows off: after blowing on the secondary; Gas furnace top, combustion chamber, last blowpipe line, waste heat boiler space all are full of coal gas, for reclaiming this part coal gas, avoid blowing air emptying to cause waste; Increased of short duration air and blown off, coal gas, the air produced have been sent to gas main in the lump go into gas holder.
Flow process: air from air main → one No. time air-valve → gas furnace → combustion chamber → go up blowpipe line → waste heat boiler → coal gas T-valve → gas washing case → scrubber tower → gas main and go into gas holder
There are following defective in above-mentioned production system and technology:
1, combustion chamber functional deterioration.The raw material that former technological design is used is coke or high-quality lump coal; The sensible heat of the high temperature blowing air that produces in the blowing process (＞650 ℃) and latent heat adopt the single stove recovery process that gets into combustion chambers burn from gas furnace; Be every gas furnace → combustion chamber → tubulation waste heat boiler → chimney, funnel temperature is about 200 ℃.The gasification of former use coke or high-quality lump coal, the combustion chamber is allocated secondary air into, makes the carbon monoxide generation secondary combustion in the coal gas, liberated heat is stored in the fire-resistant checker brick of combustion chamber, can preheating under steam blowing.In recent years, high-quality lump coal supply growing tension is for reducing cost; Adopt lump coal inferior and type gas maked coal, can only take low furnace surface temperature methodology on the technology, corresponding blowing air temperature is less than 400 ℃; Be lower than the blowing air point of ignition, behind the replacing inferior raw material, furnace surface temperature is low; Blast or incomplete combustion if allocate secondary air into more possibly in the combustion chamber, safety in production is constituted a threat to.So single stove combustion chamber flow process can not be used for reclaiming the latent heat of blowing air, directly emptying.
Though 2, blowing air reclaims sensible heat through waste heat boiler, 200 ℃～250 ℃ of temperature outs are still higher, directly discharging, and this part of waste heat can not reclaim.Combustiblecomponents is divided into carbon monoxide 8% (volume ratio, down together), hydrogen 3%, methane 1% in the blowing air.With my company is example, separate unit stove blowing amount 26000-30000m
3/ h, four stoves are opened, and every day, a large amount of blowing air entered in the atmosphere, and not only contaminate environment but also cause significant wastage is concentrated this part inflammable gas that to reclaim fully burning necessary.
3, former flow process is long, and SR is big, and indivedual valves such as coal gas T-valve break-in meeting not in place cause steam, coal gas to walk short circuit and cause waste.
4, about 300 ℃ the following coal gas that blows directly feeds the gas washing case without heat recuperation in the former flow process, and on blow coal gas temperature after the heat exchange of tubulation waste heat boiler and still have about 250 ℃, cause a large amount of waste heats losses, cooling-water consumption is increased, the WWT load increases the weight of.
Summary of the invention
The technical problem that the present invention will solve provides a kind of safe and reliable, bed gas production and the full recovery system of heat and technology that can reclaim heat, energy-conserving and environment-protective fully.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of bed gas production and the full recovery system of heat; Comprise air main, LP steam house steward, gas furnace, waste heat boiler, scrubber tower; Also comprise fly-ash separator and dry type water seal, the exit end of said air main respectively through air-valve, go up nitrogen flushing pressure lock and gas furnace the bottom, on blow into tracheae entrance end be communicated with, steam main valve, steam T-valve are installed on the LP steam house steward successively; The import of steam T-valve is connected with LP steam house steward's exit end; First and second outlet respectively with on blow into tracheae entrance end, go up air flue and be connected, on blow into tracheae outlet pipe be connected with the bottom of gas furnace
The air outlet at gas furnace top is communicated with the inlet mouth of fly-ash separator through last air flue, the air outlet of fly-ash separator respectively through blowing air recovery valve, chimney valve, on blow gas valve and be communicated with the entrance end of the concentrated retrieving arrangement of blowing air, chimney, dry type water seal,
The entrance end of following blowpipe line is communicated with the bottom of gas furnace, and exit end is communicated with the entrance end of dry type water seal, blows gas valve under the series connection on the following blowpipe line,
The exit end of dry type water seal is communicated with the import at waste heat boiler top; The outlet of waste heat boiler bottom is communicated with the inlet mouth of scrubber tower; The air outlet of scrubber tower is connected with gas holder through gas main, the coal gas main valve of connecting on the pipeline of the water seal of connection dry type and waste heat boiler
Waste heat boiler is the combined hot pipe boiler; Comprise the steam superheating section, boiler-steam dome and the boiler heating zone that set gradually from top to bottom; The boiler heating zone is provided with water-in, and the outlet of boiler heating zone links to each other with the import of boiler-steam dome, and the vapour outlet of boiler-steam dome links to each other with the import of steam superheating section; The water outlet of boiler-steam dome is connected with the water-in of boiler heating zone, and the vapour outlet of steam superheating section is connected with the LP steam house steward through the superheated vapour arm.
Bed gas production of the present invention and the full recovery system of heat, the vapour outlet of wherein said gas furnace is connected with the steam inlet of boiler-steam dome through the jacket boiler vapour pipe.
Bed gas production of the present invention and the full recovery system of heat, wherein said waste heat boiler top is provided with the boiler blow-down pipe, and the boiler blow-off valve is installed on the boiler blow-down pipe, and the scrubber tower top is provided with blow-down pipe, and blow-off valve is installed on the blow-down pipe.
Bed gas production of the present invention and the full recovery system of heat, wherein said fly-ash separator is tornado dust collector.
Bed gas production of the present invention and the full recovery system of heat, wherein said scrubber tower is the scrubber tower of band water seal.
The invention also discloses the gas prodn and the heat complete recovering technique of said fixing bed gas prodn and the full recovery system of heat, may further comprise the steps:
(1) the blowing stage: air gets into the gas furnace bottom through an air-valve; The carbon reaction generates carbon monoxide and carbonic acid gas in airborne oxygen and the stove, and blowing air goes blowing air to concentrate retrieving arrangement recovery waste heat through the blowing air recovery valve through last air flue after the dedusting of entering fly-ash separator; When gas furnace goes into operation intensification; The blowing air recovery valve is closed, and the chimney valve is opened, and blowing air is through chimney valve, chimney emptying;
(2) blow the stage on: LP steam blows into tracheae through steam main valve, steam T-valve on getting into; Air blows into tracheae on last nitrogen flushing pressure lock gets into; Get into the gas furnace bottom then simultaneously; The coal gas of producing after last air flue gets into the fly-ash separator dedusting, through on blow gas valve, dry type water seal, coal gas main valve and get into the waste heat boiler recovery waste heat, the coal gas after the cooling through scrubber tower further wash, cooling, dedusting be after gas main is gone into gas holder;
(3) blow the stage under: LP steam gets into through steam main valve, steam T-valve and goes up air flue; Get into from the gas furnace top; The coal gas that generates through blowpipe line down, blow gas valve, dry type water seal, coal gas main valve down and get into the waste heat boiler recovery waste heat, the coal gas after the cooling through scrubber tower further wash, cooling, dedusting be after gas main is gone into gas holder;
(4) blow on the secondary: the same stage flow process of blowing;
(5) air blows off the stage: air gets into the gas furnace bottom through an air-valve; Blowing air is after last air flue gets into the fly-ash separator dedusting; Through on blow gas valve, dry type water seal, coal gas main valve and get into the waste heat boiler recovery waste heat, coal gas after the cooling and air through scrubber tower further wash, cooling, dedusting be after gas main is gone into gas holder;
In above-mentioned steps (2)-step (5), the steam that the steam superheating section produces gets into the LP steam house steward through the superheated vapour arm.
Bed gas production of the present invention and heat complete recovering technique, wherein in step (2)-step (5), the jacket boiler steam in the gas furnace gets into boiler-steam dome, steam superheating section successively through the jacket boiler vapour pipe, returns the LP steam house steward after being heated.
Bed gas production of the present invention and the full recovery system of heat and technology replace the combustion chamber with fly-ash separator, have cancelled to the combustion chamber and have allocated secondary air into, have guaranteed the security of operation; Set up the blowing air recovery valve in the fly-ash separator outlet; The blowing stage, can the blowing air of blowing air and other gas furnace be delivered to blowing air in the lump and concentrate retrieving arrangement, blowing air is carried out waste heat concentrate recovery; Prevent the environmental pollution that directly discharging causes, practiced thrift the energy; To blow stage steam down and go into stove from former top of combustion chamber and change into from last air flue and go into stove, and shorten going into the stove time of time steam blowing, because former when blowing state down, steam need be full of whole combustion chamber, so has reduced waste of steam; Cancelled the gas washing case; Use and blow gas valve and blow down gas valve replacement coal gas T-valve, shortened time blowpipe line, avoided walking the waste that short circuit causes because of coal gas T-valve break-in steam, the coal gas of causing not in place; Improved single stove gas production rate; Reduced steam consumption and coal consumption, SR reduces the 70-100 millimeter water column, helps making gas; Adopt the combined hot pipe boiler to replace former waste heat boiler, the combined hot pipe boiler is divided into three sections, and epimere is the steam superheating section; The stage casing is a boiler-steam dome, and hypomere is the boiler heating zone, and flue gas is earlier through steam superheating section and steam heat-exchanging; Improved the temperature of steam; Further lower the temperature through the boiler heating zone again, on blow stage coal gas temperature behind the combined hot pipe boiler and be brought down below 130 ℃, reclaimed a large amount of heats; Under blow coal gas and also carry out heat recuperation through the combined hot pipe boiler, waste heat is fully used, and has practiced thrift the energy, has also reduced cooling water consumption and sewage load simultaneously; The combined hot pipe boiler is divided into three sections, and boiler-steam dome is with steam and water sepn, and water gets into the boiler heating zone and heats once more; Effusive steam feeds the LP steam house steward once more again after the heating of steam superheating section; Increased the thermal load of system gas system, reduced blow-time, single stove gas production rate improves.The present invention can reclaim the heat in the gas prodn process, energy-conserving and environment-protective fully.
Below in conjunction with accompanying drawing bed gas production of the present invention and the full recovery system of heat and technology are described further.
Description of drawings
Fig. 1 is a crude gas production system structural representation;
Fig. 2 is the structural representation of bed gas production of the present invention and the full recovery system of heat.
Embodiment
As shown in Figure 2; Bed gas production of the present invention and the full recovery system of heat comprise air main 21, LP steam house steward 22, gas furnace 23, fly-ash separator 24, dry type water seal 25, waste heat boiler 26, scrubber tower 27; The exit end of air main 21 respectively through air-valve 28, go up nitrogen flushing pressure lock 29 and gas furnace 23 the bottom, on blow into tracheae 30 entrance end be communicated with; Steam main valve 31, steam T-valve 32 are installed on the LP steam house steward 22 successively; The import of steam T-valve 32 is connected with LP steam house steward 22 exit end; First and second outlet 60,61 respectively with on blow into tracheae 30 entrance end, go up air flue 34 and be connected, on blow into tracheae 30 outlet pipe be connected with the bottom of gas furnace 23.
The air outlet at gas furnace 23 tops is communicated with the inlet mouth of fly-ash separator 24 through last air flue 34, the air outlet of fly-ash separator 24 respectively through blowing air recovery valve 35, chimney valve 36, on blow gas valve 37 and be communicated with the entrance end of the concentrated retrieving arrangement 38 of blowing air, chimney 39, dry type water seal 25.
Dry type water seal 25 is empty van body or hollow round column shape cylindrical shell, and inlet mouth, air outlet, water-in, water outlet are set on it.
The entrance end of following blowpipe line 40 is communicated with the bottom of gas furnace 23, and exit end is communicated with the inlet mouth of dry type water seal 25, blows gas valve 41 under the series connection on the following blowpipe line 40.
The air outlet of dry type water seal 25 is communicated with the import at waste heat boiler 26 tops; The outlet of waste heat boiler 26 bottoms is communicated with the inlet mouth of scrubber tower 27; The air outlet of scrubber tower 27 is connected with gas holder 43 through gas main 42, the coal gas main valve 44 of connecting on the pipeline of the water seal 25 of connection dry type and waste heat boiler 26.
The waste heat boiler top is provided with boiler blow-down pipe 51, and installation boiler blow-off valve 52, scrubber tower 27 tops are provided with blow-down pipe 53 on the boiler blow-down pipe 51, and blow-off valve 54 is installed on the blow-down pipe 53.
Among the present invention, the combined hot pipe boiler is commercial product, and fly-ash separator is selected tornado dust collector for use, and scrubber tower is the scrubber tower of band water seal.
The technical process of bed gas production of the present invention and the full recovery system of heat is following:
1, the blowing stage: open air-valve 28, blowing air recovery valve 35 or chimney valve 36 No. one time, other valves are closing condition.Air gets into gas furnace 23 bottoms from air main 21 through an air-valve 28, and the carbon reaction generates carbon monoxide and carbonic acid gas in airborne oxygen and the stove, and liberated heat is stored in the carbon-coating, for the system solid/liquid/gas reactions provides heat.Blowing air comes along blowing air through blowing air recovery valve 35 and other gas furnace blowing air after 24 dedustings of entering fly-ash separator and concentrates retrieving arrangement 38 recovery waste heats through last air flue 34, and chimney valve 36 cuts out at this moment.When gas furnace 23 went into operation intensification, blowing air recovery valve 35 was closed, and chimney valve 36 is opened, and blowing air is through chimney valve 36, chimney 39 emptying.
2, blow the stage on: go up nitrogen flushing pressure lock 29, steam main valve 31, on blow gas valve 37, coal gas main valve 44 is opened condition, the import of steam T-valve 32 and first exports 60 and communicates, other valves are closing condition.
LP steam gets into through steam main valve 31, steam T-valve 32 and blows into tracheae 30; Air gets into through last nitrogen flushing pressure lock 29 and blows into tracheae 30; Get into gas furnace 23 bottoms then simultaneously; Pyrocarbon reaction in steam and the stove generates carbon monoxide, hydrogen or carbonic acid gas, hydrogen, the coal gas of production after last air flue 34 gets into fly-ash separators 24 dedustings, through on blow gas valve 29, dry type water seal 25, coal gas main valve 44 and get into waste heat boilers 26 recovery waste heats; Gas temperature after the cooling is lower than 130 ℃, coal gas through scrubber tower 27 further wash, cooling, dedusting be after gas main 42 is gone into gas holder 43.
3, blow the stage down: steam main valve 31, blow gas valve 41, coal gas main valve 44 down and be opened condition, the import of steam T-valve 32 and second exports 61 and communicates, and other valves are closing condition.
LP steam is through steam main valve 31, steam T-valve 32; Get into from gas furnace 23 tops through last air flue 34; The coal gas that generates through blowpipe line 40 down, blow gas valve 41, dry type water seal 25, coal gas main valve 44 down and get into waste heat boilers 26 recovery waste heats; Gas temperature after the cooling is lower than 130 ℃, the coal gas after the cooling through scrubber tower 27 further wash, cooling, dedusting be after gas main 42 is gone into gas holder 43.
4, blow on the secondary: the same stage flow process of blowing.
5, air blows off the stage: air-valve 28, on blow gas valve 37, coal gas main valve 44 is opened condition, other valves are closing condition.
Air is from air main 21; Get into gas furnace 23 bottoms through an air-valve 28; Blowing air is after last air flue 34 gets into fly-ash separator 24 dedustings; Through on blow gas valve 37, dry type water seal 25, coal gas main valve 44 and get into waste heat boilers 26 recovery waste heats, coal gas after the cooling and air through scrubber tower 27 further wash, cooling, dedusting be after gas main 42 is gone into gas holder 43.
At above-mentioned 2-5 in the stage, get into boiler-steam dome 46, steam superheating section 45 from the jacket boiler steam of gas furnace in the native system and other gas furnaces successively through jacket boiler vapour pipe 50, return LP steam house steward 22 coal supply steam stoves 23 after being heated and use.
Bed gas production of the present invention and the full recovery system of heat and technology are compared with existing system and technology, have the following advantages:
1, replaces the combustion chamber with fly-ash separator, cancelled to the combustion chamber and allocated secondary air into, guaranteed the security of operation; After using inferior raw material instead; Adopt the boiler face cold operation, the gas furnace temperature out is reduced to 350 ℃ by 650 ℃, to the thermal stability requirement reduction of raw material; Avoid raw material efflorescence in stove, reduced carry-over.
2, set up the blowing air recovery valve in the fly-ash separator outlet; The blowing stage; Can the blowing air of blowing air and other gas furnace be delivered to blowing air in the lump and concentrate retrieving arrangement, blowing air carried out waste heat concentrate recovery, prevent the environmental pollution that directly discharging causes; Inflammable gas in the blowing air is concentrated fully burning of recovery, practiced thrift the energy.
3, nitrogen air main valve and following nitrogen flushing pressure lock have been cancelled; With the air-flow of last nitrogen flushing pressure lock import and export direction by under go out to change on advancing and go out under enterprising; Both simplified and added nitrogen air flow process, and prevented effectively again possibly cause air to scurry into system to cause oxygen content in coal gas to raise to cause serious accident to take place because of last nitrogen flushing pressure lock valve plate comes off.
4, will blow stage steam down and go into stove from former top of combustion chamber and change into from last air flue and go into stove, and shorten going into the stove time of time steam blowing, because former when blowing state down, steam need be full of whole combustion chamber, so has reduced waste of steam.
5, cancelled the gas washing case; Use and blow gas valve and blow down gas valve replacement coal gas T-valve, shortened time blowpipe line, avoided walking the waste that short circuit causes because of coal gas T-valve break-in steam, the coal gas of causing not in place; Improve single stove gas production rate, reduced steam consumption and coal consumption.In addition, behind the cancellation gas washing case, SR reduces the 70-100 millimeter water column, helps making gas.
6, adopt the combined hot pipe boiler to replace former waste heat boiler, the combined hot pipe boiler is divided into three sections, and epimere is the steam superheating section; The stage casing is a boiler-steam dome, and hypomere is the boiler heating zone, and flue gas is earlier through steam superheating section and steam heat-exchanging; Improved the temperature of steam; Further lower the temperature through the boiler heating zone again, on blow stage coal gas temperature behind the combined hot pipe boiler and be brought down below 130 ℃, reclaimed a large amount of heats.The upper and lower gas heat that blows of 1 recyclable 3 gas furnace of combined hot pipe boiler.
7, blow coal gas under among the present invention and also carry out heat recuperation through the combined hot pipe boiler, waste heat is fully used, and has practiced thrift the energy, has also reduced cooling water consumption and sewage load simultaneously.
8, the saturation steam of former jacket boiler, waste heat boiler generation directly feeds LP steam house steward coal supply steam stove system gas, and steam in the boiler rate of decomposition and gas furnace gas deliverability are low.Existing combined hot pipe boiler is divided into three sections; Boiler-steam dome is with steam and water sepn, and water gets into the boiler heating zone and heats once more, and effusive steam feeds the LP steam house steward once more again after the heating of steam superheating section; Jacket boiler steam feeds the LP steam house steward again after boiler-steam dome, steam superheating section are overheated; Increased the thermal load of system gas system, reduced blow-time, single stove gas production rate improves.Superheated vapour is gone into stove, has avoided water entrained by steam, has prolonged the work-ing life of refractory brick in the gas furnace.
9, increased the dry type water seal, reduced the flow velocity of coal gas entering scrubber tower, made the solid particulate sedimentation once more in the coal gas, in addition, when maintenance gas furnace and fly-ash separator, can in the dry type water seal, add water and isolate, safe and reliable.
10, set up blow-down pipe and blow-off valve at combined hot pipe boiler top, blow-off valve and blow-down pipe are set, stop or during the maintenance displacement, system purges and can segmentation carry out at the scrubber tower top, i.e. the supreme gas valve section of blowing of gas furnace, sweep gas is from chimney emptying; Gas furnace, following blowpipe line to scrubber tower section, sweep gas is from combined hot pipe boiler top and the emptying of scrubber tower top.
Above-described embodiment describes preferred implementation of the present invention; Be not that scope of the present invention is limited; Design under the prerequisite of spirit not breaking away from the present invention; Various distortion and improvement that those of ordinary skills make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (7)
1. bed gas production and the full recovery system of heat; Comprise air main, LP steam house steward, gas furnace, waste heat boiler, scrubber tower; It is characterized in that: also comprise fly-ash separator and dry type water seal, the exit end of said air main respectively through air-valve, go up nitrogen flushing pressure lock and gas furnace the bottom, on blow into tracheae entrance end be communicated with, steam main valve, steam T-valve are installed on the LP steam house steward successively; The import of steam T-valve is connected with LP steam house steward's exit end; First and second outlet respectively with on blow into tracheae entrance end, go up air flue and be connected, on blow into tracheae outlet pipe be connected with the bottom of gas furnace
The air outlet at gas furnace top is communicated with the inlet mouth of fly-ash separator through last air flue, the air outlet of fly-ash separator respectively through blowing air recovery valve, chimney valve, on blow gas valve and be communicated with the entrance end of the concentrated retrieving arrangement of blowing air, chimney, dry type water seal,
The entrance end of following blowpipe line is communicated with the bottom of gas furnace, and exit end is communicated with the inlet mouth of dry type water seal, blows gas valve under the series connection on the following blowpipe line,
The air outlet of dry type water seal is communicated with the import at waste heat boiler top; The outlet of waste heat boiler bottom is communicated with the inlet mouth of scrubber tower; The air outlet of scrubber tower is connected with gas holder through gas main, the coal gas main valve of connecting on the pipeline of the water seal of connection dry type and waste heat boiler
Waste heat boiler is the combined hot pipe boiler; Comprise the steam superheating section, boiler-steam dome and the boiler heating zone that set gradually from top to bottom; The boiler heating zone is provided with water-in, and the outlet of boiler heating zone links to each other with the import of boiler-steam dome, and the vapour outlet of boiler-steam dome links to each other with the import of steam superheating section; The water outlet of boiler-steam dome is connected with the water-in of boiler heating zone, and the vapour outlet of steam superheating section is connected with the LP steam house steward through the superheated vapour arm.
2. bed gas production according to claim 1 and the full recovery system of heat is characterized in that: the vapour outlet of said gas furnace is connected with the steam inlet of boiler-steam dome through the jacket boiler vapour pipe.
3. bed gas production according to claim 2 and the full recovery system of heat; It is characterized in that: said waste heat boiler top is provided with the boiler blow-down pipe; The boiler blow-off valve is installed on the boiler blow-down pipe, and the scrubber tower top is provided with blow-down pipe, and blow-off valve is installed on the blow-down pipe.
4. bed gas production according to claim 3 and the full recovery system of heat is characterized in that: said fly-ash separator is tornado dust collector.
5. bed gas production according to claim 4 and the full recovery system of heat is characterized in that: said scrubber tower is the scrubber tower of band water seal.
6. according to the gas prodn and the heat complete recovering technique of each said bed gas production of claim 1-5 and the full recovery system of heat, it is characterized in that may further comprise the steps:
(1) the blowing stage: air gets into the gas furnace bottom through an air-valve; The carbon reaction generates carbon monoxide and carbonic acid gas in airborne oxygen and the stove, and blowing air goes blowing air to concentrate retrieving arrangement recovery waste heat through the blowing air recovery valve through last air flue after the dedusting of entering fly-ash separator; When gas furnace goes into operation intensification; The blowing air recovery valve is closed, and the chimney valve is opened, and blowing air is through chimney valve, chimney emptying;
(2) blow the stage on: LP steam blows into tracheae through steam main valve, steam T-valve on getting into; Air blows into tracheae on last nitrogen flushing pressure lock gets into; Get into the gas furnace bottom then simultaneously; The coal gas of producing after last air flue gets into the fly-ash separator dedusting, through on blow gas valve, dry type water seal, coal gas main valve and get into the waste heat boiler recovery waste heat, the coal gas after the cooling through scrubber tower further wash, cooling, dedusting be after gas main is gone into gas holder;
(3) blow the stage under: LP steam gets into through steam main valve, steam T-valve and goes up air flue; Get into from the gas furnace top; The coal gas that generates through blowpipe line down, blow gas valve, dry type water seal, coal gas main valve down and get into the waste heat boiler recovery waste heat, the coal gas after the cooling through scrubber tower further wash, cooling, dedusting be after gas main is gone into gas holder;
(4) blow on the secondary: the same stage flow process of blowing;
(5) air blows off the stage: air gets into the gas furnace bottom through an air-valve; Blowing air is after last air flue gets into the fly-ash separator dedusting; Through on blow gas valve, dry type water seal, coal gas main valve and get into the waste heat boiler recovery waste heat, coal gas after the cooling and air through scrubber tower further wash, cooling, dedusting be after gas main is gone into gas holder;
In above-mentioned steps (2)-step (5), the steam that the steam superheating section produces gets into the LP steam house steward through the superheated vapour arm.
7. bed gas production according to claim 6 and heat complete recovering technique; It is characterized in that: in step (2)-step (5); Jacket boiler steam in the gas furnace gets into boiler-steam dome, steam superheating section successively through the jacket boiler vapour pipe, returns the LP steam house steward after being heated.
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| CN106190316A (en) * | 2016-08-25 | 2016-12-07 | 湖北三宁化工股份有限公司 | A kind of reduction fixed-bed intermittent formula gasification furnace blowing-out gas effective ingredient (CO+H2) method and apparatus of content |
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| CN103642530A (en) * | 2013-12-04 | 2014-03-19 | 张秀军 | Counterflow burning type coal gasifier device and process thereof |
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| CN106545831A (en) * | 2017-01-24 | 2017-03-29 | 北京金泰瑞和工程科技有限公司 | Waste heat boiler heat exchanger and fixed bed pressured gasification system |
| CN107603677A (en) * | 2017-11-07 | 2018-01-19 | 山东京博众诚清洁能源有限公司 | A kind of Gas Production equipment and its safe blow-in method |
| CN107603677B (en) * | 2017-11-07 | 2020-11-20 | 山东京博众诚清洁能源有限公司 | Coal gas production equipment and safe blow-in method thereof |
| CN109485014A (en) * | 2018-11-07 | 2019-03-19 | 襄阳泽东化工集团有限公司 | A kind of ammonia system |
| CN109485014B (en) * | 2018-11-07 | 2022-04-15 | 襄阳泽东化工集团股份有限公司 | Synthetic ammonia gas making system |
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