CN208964866U - It is a kind of cooperation-gasified can dispose waste liquid, the gasification system of slurry and coal dust - Google Patents
It is a kind of cooperation-gasified can dispose waste liquid, the gasification system of slurry and coal dust Download PDFInfo
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- CN208964866U CN208964866U CN201820819492.0U CN201820819492U CN208964866U CN 208964866 U CN208964866 U CN 208964866U CN 201820819492 U CN201820819492 U CN 201820819492U CN 208964866 U CN208964866 U CN 208964866U
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Abstract
The utility model discloses one kind cooperation-gasified to dispose waste liquid, the gasification system of slurry and coal dust, the gasification system includes gasification furnace, the top of the gasification furnace is equipped with the assembled nozzle for protruding into vaporizer, and the multiple coal dust burners for protruding into the vaporizer being uniformly arranged around the assembled nozzle；By the feeding manner sprayed under raw material gasify in gasification furnace coal dust while the liquid slurries such as gasified coal water slurry and can also dispose waste liquid；The utility model is lighted a fire using fuel gas and oxygen by assembled nozzle, and coal dust burner feeds intake, and fuel gas is switched to waste liquid or slurry, realizes high-efficiency gasification coal dust, liquid slurry and the purpose to dispose waste liquid simultaneously；The utility model device structure is simple, system flow is short, has and is simple to manufacture, invests that low, gasification efficiency is high, easy to operate while being able to solve organic liquid waste and handle the environmental problems such as difficult, at high cost.
Description
Technical field
The utility model, which belongs to coal chemical industry and waste processing and recycle utilization technology field, in particular to one kind, can cooperate with gas
Change dispose waste liquid, the gasification system of slurry and coal dust.
Background technique
Based on coal, when manufacturing of many chemicals, is transformed the energy and resources consumption in China by coal
, and the source of these conversions is all the synthesis converted coal into based on carbon monoxide and hydrogen using coal gasification technology
The chemicals or fuel in downstream are further synthetically produced after gas.There are many process and technology of coal gasification, such as atmosphere intermission
Fixed bed, oxygen-enriched gas making, fluidized gasification and air flow bed pressurized gasification etc., and air flow bed pressurized gasification technology is technologically advanced because of its
Property, the advantage in environmental safety, index superiority and investment repayment economy, widely connect by domestic coal chemical industry factory
By and approve.Air flow bed pressurized gasification technology can be subdivided into again with the dry powder coal gasification of coal dust two-phase transportation charging and with water-coal-slurry
Equal liquid slurries pump is input into the coal water slurry gasification technology of material, and two kinds of technologies respectively have feature:
Dry powder coal gasification using dry little particle coal dust and oxygen as gasified raw material, coal conversion can reach 99% with
On, effective Gas content 87-93%, cold gas efficiency 79-83%, unit product oxygen consumption, coal consumption it is low, be current gasification efficiency most
High gasification technology.But in gasification, in order to reach the heat balance and temperature equalization in gasification furnace, need toward contact in original
A certain amount of steam is added in material oxygen, particularly with the raw coal high with phosphorus content such as anthracite, coke powders, calorific value is high, is being gasified
The amount of the steam of Shi Tianjia also can be higher.
Coal water slurry gasification is made using the water-coal-slurry of effective material content 60% or so (remaining is water) or liquid slurry and oxygen
Require for gasified raw material, when gasification to the atomization of slurry and with the mixing of oxygen it is higher, although coal conversion can also reach
95% or more, but because of the presence of a large amount of water, at a temperature of 1300 DEG C or more of gasification operation, heating vaporization can consume a large amount of
Heat, so that effectively Gas content is 76-83%, cold gas efficiency 74-77%, under identical operating condition, the oxygen of unit product
Consumption is high compared with dry powder coal gasification by 20~25%, and coal consumption is high by 10~15%, and gasification efficiency is substantially reduced.But because of the slurry of coal water slurry gasification
Organic matter and oily waste water can be contained using higher cost when being difficult to handle or handle by traditional water treatment technology when material preparation
Oil in waste water is converted to carbon monoxide and two with organic matter in 1300 DEG C or more of high-temperature gasification as slurrying water by water
The single carbon compound of carbonoxide enters in product synthesis gas.Because of this advantage, in some coal chemical industry factories, especially product
The factory of diversification, on the basis of the economy of the full factory of synthesis, society and environmental benefit, coal water slurry gasification is also widely answered
With.Characteristic and advantage and disadvantage based on both the above entrained flow gasification develop a kind of both fusions advantage, can handle waste water but also
The gasification system for obtaining higher gasification efficiency becomes a kind of demand.
Patent CN102643678A discloses a kind of pulverized coal or water coal slurry gasification furnace system, and patent CN102746899A is disclosed
A kind of water-coal-slurry/pulverized coal gasification furnace and its feeding method, both of which is intended to utility model one kind being capable of single realization gasification
The device of the gasification furnace of water-coal-slurry or coal dust increases the adaptability to raw material of gasification furnace, but can only select when design-build and operation
One of raw material feeds mode is selected, the ability for not having while feeding or being quickly converted can not achieve above-mentioned while have
The demand of standby above-mentioned new process.
Patent CN103897739A coal is total to gasification process and provides a kind of while gasify dried coal powder and water-coal-slurry method,
Wherein, coal nozzle is set to vaporizer top center, and coal-water slurry nozzle is set to vaporizer side wall, but this method is thick
It is omiting, conceptual, it is not specific enough and practical, do not have conduct and complete design, construction and the ability of production.
Patent CN101760244A discloses a kind of three-phase multi-raw-material pressurized coal gasification device and its technique, it is intended to pass through
On the basis of GE coal water slurry gasification technology, original single assembled nozzle of overhead down-jetting type is improved, connect it can
It can be received water-coal-slurry charging again by dry-coal feeding, so that realizing reduces into furnace raw coal total moisture content, improve gasification efficiency, reduce two
Aoxidize the effect of carbon emission.But for assembled nozzle, such as GE Water-coal-slurry nozzle, HT-L dry powder burner or GSP dry powder burner,
It needs to meet the charging of coal dust/water-coal-slurry, oxygen, fuel gas, also to meet swirl injection and utilizes cooling water hydronic
It is required that needing simultaneously that there are the plurality of passages such as coal dust/water-coal-slurry, oxygen, fuel gas, cooling water in the structure of burner, also to light a fire
With flame detecting device and to realize good mixing swirl-flow devices, structure is complicated for itself, processing and manufacturing difficulty or ease are big, service life
It is low, also it is in the stage of further improvement and optimization.If by this patent implement, be further added by the basis of original burner channel and
Auxiliary equipment, the difficulty that the assembled nozzle for being bound to further increase designs and manufactures increase its accident rate, influence device
Long-period stable operation.
Patent CN104531219B discloses a kind of while gasify coal dust and water-coal-slurry pressure gasification process, patent
CN203820729U discloses a kind of multiaxis three-phase coal dust pressurizing gasifying apparatus, considers two kinds of entrained flow bed gasification technologies
Advantage, it is intended to by coal of spraying water under the Shell side spray dry powder coal gasifier and GE overhead of comparative maturity by way of simple combination
The burner configuration combination of gasification furnace is starched in the vaporizer of a gasification furnace, spray water under top coal slurry and oxygen, medial side spray drying
Powder and oxygen, difference are that gasification furnace lower part uses different synthesis gas cooling treatment modes (Quench washing and useless pot).
This combined idea is fine, but does not account for requirement of the gasification furnace apparatus to gasification indoor temperature distribution, is not directed to
Indoor raw material mixing of gasifying adequately is studied with the expansion in temperature field.The study found that this gasification furnace is easy hair at runtime
Temperature distribution is non-uniform caused by the raw unevenness because of Flow Field Distribution, influences gasification reaction, and hot-spot causes dross uneven and equipment
The case where influences such as damage and slag are unsmooth and restriction gasification furnace stable operation, it is difficult to realize long-term, stable industrial metaplasia
It produces.
Therefore develop it is a kind of will merge above two entrained flow gasification advantage, satisfaction can gasify slurry and dispose waste liquid and
The demand of higher gasification efficiency can be obtained, at the same apparatus structure is simple, facilitate operation, be easy to industrialize run steadily in the long term and
The gasification installation and system of maintenance are necessary.
Utility model content
The purpose of the utility model is to provide one kind cooperation-gasified to dispose waste liquid, the gasification system of slurry and coal dust, melts
Close state dried coal powder charging and water-coal-slurry feed vaporization different advantage and characteristics, develop a kind of structure it is simple, it is easy to operate, can
By property it is strong with dry powder gasify based on and meanwhile be capable of handling the pressurizing gasifying apparatus of organic wastewater and liquid slurry, realize efficient coal
Environmental protection is taken into account while gasification and is recycled.
To achieve the above object, the technical solution of the utility model is as follows:
It is a kind of cooperation-gasified can dispose waste liquid, the gasification system of slurry and coal dust, the gasification system includes gasification furnace, institute
The top for stating gasification furnace is equipped with vaporizer, and the top of the vaporizer is equipped with burner seat, wherein sets at the center of the burner seat
There is the assembled nozzle for protruding into the vaporizer, is also uniformly provided with described in multiple protrude into around the assembled nozzle on the burner seat
The coal dust burner of vaporizer；The assembled nozzle be respectively from inside to outside spark lever and flame detector channel, fuel gas passageway,
Inner ring oxygen channel, feed liquid passage, outer ring oxygen channel and the water inlet of burner cooling water and backwater channel；
The gasification system further includes waste liquid supply system and water-coal-slurry supply system；The waste liquid supply system and water coal
Slurry supply system is connected to the feed liquid passage respectively, to be simultaneously or separately that the assembled nozzle supplies waste liquid and water-coal-slurry is made
For the feed liquid for being sent into the feed liquid passage.
Gasification system according to the present utility model, it is preferable that the coal dust burner is respectively that center oxygen is logical from inside to outside
Road, the first burner cooling-water duct, coal dust channel and the second burner cooling-water duct；The center oxygen channel is in the coal dust
The burner head of burner is provided with cyclone, for spraying oxygen by burner head with certain tangential and axial velocity.
Gasification system according to the present utility model, it is preferable that the number of the coal dust burner is three or four, and institute
The angle stated between the central axis of coal dust burner and the central axis of the vaporizer is 0-15 °.
Gasification system according to the present utility model, it is preferable that the coal dust burner is arranged towards the vaporizer central axis,
Angle between the central axis of the coal dust burner and the central axis of the vaporizer is 2-12 °.
Gasification system according to the present utility model, it is preferable that water-cooling wall is equipped in the vaporizer, the assembled nozzle
Burner head and the burner head of the coal dust burner are arranged in the water-cooling wall of burner seat lower end is concordant.
Gasification system according to the present utility model, it is preferable that the lower part of the vaporizer is equipped with portion, shock chamber, the Quench
Room and vaporizer are connected by cinder notch, for the synthesis gas from the vaporizer to be cooled down and washed.
Compared with prior art, the beneficial effects of the utility model and innovative point are:
1. the utility model has merged the advantage of dry coal powder gasification and coal water slurry gasification, while process is short, investment is low, operation
Simplicity, under higher gasification efficiency and lower raw materials consumption, the wastes such as waste liquid and slurry for being capable of handling in factory,
It can either protect environment can also be by recycling creation economic benefit.
2. the gasification furnace of the utility model uses the structure sprayed under overhead multiinjector, in furnace mixing and back-mixing effect it is good,
Fluid field in furnace is evenly distributed, and directly sprays the thermal-flame center to vaporizer with the waste liquid or slurry of oxygen atomization good mixing
Area, it is ensured that its higher gasification result and conversion ratio；In-furnace temperature is evenly distributed, and ensure that gasification furnace gasification is indoor steady
Determine dross and smooth deslagging, is often created condition for the stable operation of gasification installation.Compared to gasification furnace structure existing in market
It makes, the outstanding coal dust that realizes of the multiinjector overhead structure that the utility model uses uniformly divides in gasification burner reaction chamber
Cloth, while making its Flow Field Distribution more reasonable.Multiinjector overhead structure substantially increases lime-ash in gasification furnace and backflows effect, gas
Change room recirculation zone to expand, preferably realizes water-cooling wall (especially chimney arch top) dross.And to gasify using this structure
Crude synthesis gas flows to identical with lime-ash in furnace, and vaporizer deslagging ability greatly improved.Due to reasonably designing, more coal ash
Slag can come into full contact with water-cooling wall, and the ratio of slag ash is improved, to realize higher feed coal efficiency of carbon con version.
3., for the stability for guaranteeing coal dust conveying, needing to exist the water content control in coal dust for dry powder gasification
In a certain range, but in gasifier operation, need to add a certain amount of water vapour in gasification furnace to maintain inside gasification furnace
Temperature and heat balance.Organic wastewater or liquid slurry are introduced in this patent in gasification furnace, is meeting original process requirement
On the basis of can also realize processing waste create added value effect.In addition, the gasification furnace permission of the utility model is higher
Operation temperature can be used the coal of more high ash melting point as raw material, and realize that higher feed coal efficiency of carbon con version (can achieve
99%) substances such as heavy hydrocarbon, tar, are not generated at the same time, being effectively synthesized gas ingredient may be up to 90-93% or so, cooled coal gas effect
Rate can 80-83% or so.Simultaneously on the basis of guaranteeing that raw coal effectively converts, for section's woods dry-powder air-current bed gasification furnace, it is
It realizes and stablizes slag tap, the fluxing dosage of required addition is fewer in raw coal.And under identical gasification furnace coal feeding amount load, adopt
Make gasification furnace smaller with multiinjector overhead structure, also establishes reliable basis for gasification burner enlargement.
Detailed description of the invention
Fig. 1 is the schematic diagram in a kind of embodiment of the gasification system of the utility model, wherein for simplicity, it is multiple
Coal dust burner illustrates only one；
Fig. 2 is the partial sectional view of burner seat and burner thereon in Fig. 1；
Fig. 3 is that the vertical view of the burner seat and burner thereon in a kind of embodiment of the gasification system of the utility model is shown
It is intended to；
Fig. 4 is the burner head cross-sectional view of assembled nozzle in Fig. 3；
Fig. 5 is the cross-sectional view on the burner head of coal dust burner in Fig. 3.
Specific embodiment
The utility model is further described below with reference to attached drawing, but the utility model is not limited to that.
As shown in Figure 1, the gasification system of cooperation-gasified can the disposing waste liquid of the utility model, slurry and coal dust includes gasification
Furnace 1, the top of the gasification furnace 1 are equipped with vaporizer 2, and the top of the vaporizer 2 is equipped with burner seat 3, wherein the burner
It is equipped with the assembled nozzle 4 for protruding into the vaporizer 2 at the center of seat 3, the assembled nozzle 4 is also surround on the burner seat 3
The even multiple coal dust burners 5 for protruding into the vaporizer 2, such as two, three, four, or more of being equipped with are around combination burning
The coal dust burner 5 that mouth 4 is uniformly arranged.
The assembled nozzle 4 is located at 1 top center of gasification furnace, is arranged straight down, is from inside to outside respectively to light a fire
Bar and flame detector channel 41, fuel gas passageway 42, inner ring oxygen channel 43, feed liquid passage 44, outer ring oxygen channel 45,
And burner cooling water is intake and backwater channel 46.Wherein, it will be appreciated by those skilled in the art that the spark lever and flame detector
It is provided with spark lever and flame detector in channel 41, is installed on assembled nozzle 4 as auxiliary device is mating, to carry out
Igniting and fire defector；The fuel gas passageway 42, inner ring oxygen channel 43, feed liquid passage 44 and outer ring oxygen channel 45 can
To be passed through corresponding material when needed, to work normally；The burner cooling water water inlet and backwater channel 46 are arranged in group
4 periphery of burner is closed, the injection and discharge for cooling water are so as to cooling protection assembled nozzle 4, especially burner head；It is above-mentioned each
Channel is specifically configured to that known in the art which is not described herein again.When igniting, first by outer ring oxygen and fuel gas (fuel gas
The natural gas or oil gas that can be the stage of going into operation are also possible to periodic off-gases etc. of the factory containing fuel gas) introduce gasification furnace 1
In, the fuel that will be ejected from igniter burner head by being deep into the burning torch electrion on burner head of assembled nozzle 4
Gas and oxygen ignite, and whether flame detector detection furnace fuel gas and oxygen ignite, remaining inner ring oxygen is logical in ignition process
Road 43 and feed liquid passage 44, which are passed through a small amount of nitrogen as positive seal gas, prevents oxygen, fuel gas or combustion product gases etc. from scurrying into it
His channel；It determines after light a fire successfully, by raising outer ring oxygen and fuel gas flow, in increase furnace, combustion intensity and thermic load be extremely
Feeding intake for coal dust burner 5 can be carried out after prescribed requirement.
The gasification system further includes waste liquid supply system and water-coal-slurry supply system (not shown)；The waste liquid supplies
System and water-coal-slurry supply system is answered to be connected to respectively with the feed liquid passage 44, to be simultaneously or separately that the assembled nozzle 4 supplies
Answer waste liquid and water-coal-slurry as the feed liquid for being sent into the feed liquid passage 44, to gasify.The waste liquid supply system and water-coal-slurry
Supply system is specifically configured to that known in the art which is not described herein again.Certainly, it will be appreciated by those skilled in the art that the gasification
System can also include that the subsystem of material is supplied for other burner channels, and to be known in the art, which is not described herein again.It is sent into
The feed liquid of the feed liquid passage 44 can be water-coal-slurry, organic liquid waste, residual oil slurry etc., or utilize at least portion such as organic liquid waste
Divide the water-coal-slurry of substitution water configuration.
The coal dust burner 5 is used to spray into coal dust and oxidant into the vaporizer 2 to carry out gasification reaction
It is known in the art.In one embodiment, the coal dust burner 5 is respectively center oxygen channel 51, first from inside to outside
Burner cooling-water duct 52, coal dust channel 53 and the second burner cooling-water duct 55；The center oxygen channel 51 is in the coal
The burner head of powder burner 5 is provided with cyclone 56, for spraying oxygen by burner head with certain tangential and axial velocity
Out.Coal dust after the inert gases two-phase transportations to the coal dust import of coal dust burner 5 such as carbon dioxide or nitrogen by coal dust by being burnt
Coal dust channel 53 in mouth 5 enters gasification furnace 1, and oxygen enters gasification furnace 1 by center oxygen channel 51.Burner cooling water is to close
Road circulation, to give burner Head cooling, avoiding the long-term high-temperature heating damage in burner head, (for details, reference can be made to patents
CN104713081A)。
In addition, turbulent flow suppressor can also be set at coal dust charging and distributor so that coal dust is evenly distributed to each coal dust logical
Then road branch makes coal dust with certain tangential and axial velocity by burner by the coil pipe and connection sheet that are arranged on branched bottom
Head sprays.Coal dust and oxygen after leaving burner head by its tangential and axial velocity, realize oxygen and coal dust cutting,
Eddy flow and uniformly mixing, improve the interior uniform dross of gasification efficiency and gasification furnace of the coal dust under furnace high-temperature environment.Coal dust
Burner head can also lay refractory material by refractory coating fixed block 57 and burner cooling water is cooperated to reach protection burner head,
Avoid it for a long time in the effect of hot environment heat damage (for details, reference can be made to patent CN104713081A).When coal dust feeds intake, when
After combustion intensity and thermic load reach prescribed requirement in furnace, multiple coal dust burners 5 come into operation one by one or simultaneously, pass through flame in the process
Detector observes combustion position in furnace.
To make the coal dust burner 5 and assembled nozzle 4 that preferable cooperation-gasified effect may be implemented, in one embodiment
In, the number of the coal dust burner 5 is three or four, preferably three, and the central axis of the coal dust burner 5 with described group
The angle closed between the central axis of burner 4 is 0-15 °, such as 2,5,8,10 or 12 °；It will be appreciated by those skilled in the art that angle is
At 0 °, that is, indicate to be parallel between the central axis of the coal dust burner 5 and the central axis of the assembled nozzle 4, when not be 0 °
When, that is, indicate that the coal dust burner 5 is arranged towards 4 central axis of assembled nozzle and angle is no more than 15 °；It is further excellent
Selection of land, the coal dust burner 5 are arranged towards 4 central axis of assembled nozzle, the central axis of the coal dust burner 5 and the combination
Angle between the central axis of burner 4 is preferably 2-12 °；It is highly preferred that being equipped with water-cooling wall 21, such as spiral shell in the vaporizer 2
The burner head of capstan tubular type or shell and tube water-cooling wall etc., the burner head of the assembled nozzle 4 and the coal dust burner 5 is equal
Setting concordant with the water-cooling wall 21 of 3 lower end of burner seat is in.After above-mentioned measure, burning in vaporizer 2 can be made
Temperature field range is wider, and gasifier temperature is integrally more uniform, and particle effective residence time and conversion ratio are guaranteed；Together
When, whole back mixing effect is more uniform, has substantially ensured good dross effect from top to down, realizes uniformly with slag anti-slag
Protective effect.
In one embodiment, the lower part of the gasification furnace 1 is equipped with shock chamber 7, and the shock chamber 7 and vaporizer 2 are logical
Cinder notch 6 is crossed to be connected, for the synthesis gas from the vaporizer 2 to be cooled down and is washed, such as downlink water Quench structure.
Certainly, it will be appreciated by those skilled in the art that for the synthesis gas from the vaporizer 2, can also be carried out using waste boiler type structure
Heat recovery, or using waste boiler type structure in such a way that water Quench combines, synthesis gas is recycled first with waste boiler type structure
Then heat with further cooling syngas and is washed using water Quench synthesis gas.
When being gasified using above-mentioned gasification system, gasification includes:
Ignition phase, first with the outer ring oxygen channel 45 by outer ring oxygen and the fuel gas passageway 42 by fuel
Gas is introduced into gasification furnace, will be ejected from burner head by being deep into the burning torch on burner head of the assembled nozzle 4
Whether fuel gas and oxygen ignite, detect furnace fuel gas and oxygen using flame detector and light a fire success；Institute in ignition process
It states inner ring oxygen channel 43 and feed liquid passage 44 is passed through a small amount of nitrogen as positive seal gas and prevents oxygen, fuel gas or burning cigarette
Gas etc. is scurried into；It is mentioned after lighting a fire successfully, on spark lever to protect igniting club head, then by improving outer ring oxygen and fuel gas stream
Amount is that the coal dust burner feeds intake and prepares to increase combustion intensity and thermic load in furnace；The assembled nozzle 4 is in point at this time
Fiery mode；
Coal dust feeding stage, after thermic load reaches requirement in furnace, multiple coal dust burners 5 come into operation one by one or simultaneously, i.e., will
Corresponding material is sent by the corresponding channel of the coal dust burner 5；Preferably, it is hot in furnace when thermic load reaches normal operation in furnace
Load (Design cooling load) 2%~3% when, multiple coal dust burners come into operation one by one or simultaneously, such as the gasification of Design cooling load 400MW
Furnace (day coal feeding amount about 1500t), thermic load about 10MW can carry out multiple coal dust burners 5 and come into operation one by one or simultaneously, if with natural
Gas is fuel gas, gas discharge about 740Nm3/ h, corresponding oxygen flow about 2300Nm3/h).During coal dust feeds intake,
Combustion position in furnace can be observed by the flame detector.
Feed liquid feeding stage comes into operation to all or part of coal dust burner 5, after coal dust gasification is stable in gasification furnace 1, institute
State the switching that assembled nozzle 4 carries out ignition mode and feed liquid feed vaporization mode；It preferably, can after coal dust gasification in gasification furnace
To carry out above-mentioned switching after stably obtaining satisfactory synthesis gas, such as in no less than 2min, such as 5min, 8min,
In 10min or 15min, composition, the temperature and pressure of gained synthesis gas meet design requirement.When switching, first by the combustion
Fuel gas in material gas channel 42 switches to nitrogen, is then switched to the nitrogen of the feed liquid passage 44 and supplies from the waste liquid
The nitrogen of the feed liquid and the interior epoxy channel 43 of answering system and/or water-coal-slurry supply system is switched to oxygen, and feed liquid is in institute
The head of assembled nozzle 4 is stated first by the inner ring oxygen from the interior epoxy channel 43 and from the fuel gas passageway 44
Nitrogen cuts, is atomized, mixes and eject burner head, thus with the outer ring oxygen from the outer ring oxygen channel 45 into
The mixing and atomization of one step, and gasification reaction is carried out in gasification furnace vaporizer 2.Preferably, in the gasification of feed liquid and coal dust
Cheng Zhong, the coal dust and oxygen flow of the coal dust burner, the feed liquid of assembled nozzle and amount of oxygen independently control so that described
The temperature of vaporizer is not less than 1400 DEG C.
In the vaporizer of gasification furnace, as gasifying agent and coal dust and feed liquid, (feed liquid can be waste liquid to oxygen, be also possible to
The liquid slurry manufactured using coal, residual oil or activated sludge and waste water) it is reacted, it is converted into synthesis gas and is dropped through shock chamber 7
Downstream unit is sent into as product after mild lime-ash separation, it is preferable that 1400~1700 DEG C of gasification temperature, vapor pressure 2.5~
4.0℃。
Embodiment:
Coal chemical industry factory produces multi-chemical, coal data such as table 1 by raw material of coal, and part raw coal passes through pyrolysis production
Tar, other oil products and coke powder, part raw coal produce synthesis gas by coal gasification and synthesize other chemicals for downstream.Tar and waste water
The waste water COD and ammonia-nitrogen content of discharge are high (water quality is shown in Table 2), containing ammonia nitrogen, the monocycles such as phenols, indoles, quinoline or polycyclic fragrance
The heterocycle organic matter of compounds of group and nitrogenous, sulphur, oxygen belongs to one of very difficult waste water.
Gasification installation is by taking 1500 tonnes of separate unit coal feeding amount of gasification furnace as an example in factory, as shown in Figure 1-3, using overhead 3+1
Burner, i.e. 3 coal dust burners and 1 center combination burner, the center of the central axis of the coal nozzle and the assembled nozzle
Angle between axis is 0 °；The burner head of the assembled nozzle and the burner head of the coal dust burner are and in described
The water-cooling wall of burner seat lower end is concordantly arranged.
Assembled nozzle charging is switched to by natural gas by the liquid slurry of tar and waste water, raw coal preparation, slurry after going into operation
Solid concentration 58%-60%, 17~18MJ/kg of calorific value.1500 DEG C of gasification temperature, vapor pressure 4.0MPaG.Each coal dust burner
Coal feeding amount be 15t/h, oxygen 9200Nm3/ h, the slurry input amount of assembled nozzle are 13t/h, oxygen 5000Nm3/h.Production is closed
At gas (butt) 106000Nm3/ h, effective 89~90vol% of Gas content, efficiency of carbon con version 99%.It can handle and utilize in the process
Organic wastewater about 4t/h (if gasifying only with dry powder, needs to add 2.5~3t/h of steam), and the waste water 10 through gasification discharge~
15t/h (Quench, washing water after precipitation process), main component such as table 3, COD are lower than 300mg/L, and ammonia nitrogen is lower than 250mg/
L, the organic compound without more than one carbon, reuse can reach after processing can be completed by conventional biochemical sewage treatment system
Mark discharge.
Table 1: raw coal tables of data
Table 2: tar and waste water water quality table
| Project | CODcr | Ammonia nitrogen | Phenol | SS | PH |
| Unit | mg/L | mg/L | mg/L | mg/L | |
| Numerical value | 6900~7700 | 2500~2600 | 900~1100 | <300 | 8~9 |
Table 3: gasification waste water water quality table
| Project | CODcr | Ammonia nitrogen | Phenol | SS | PH |
| Unit | mg/L | mg/L | mg/L | mg/L | |
| Numerical value | <200 | <100 | 0 | <100 | 6~9 |
Claims (6)
1. one kind cooperation-gasified can dispose waste liquid, the gasification system of slurry and coal dust, the gasification system includes gasification furnace, described
The top of gasification furnace is equipped with vaporizer, and the top of the vaporizer is equipped with burner seat, which is characterized in that the center of the burner seat
Place is equipped with the assembled nozzle for protruding into the vaporizer, is also uniformly provided with multiple protrude into around the assembled nozzle on the burner seat
The coal dust burner of the vaporizer；The assembled nozzle is respectively spark lever and flame detector channel, fuel gas from inside to outside
Channel, inner ring oxygen channel, feed liquid passage, outer ring oxygen channel and the water inlet of burner cooling water and backwater channel；
The gasification system further includes waste liquid supply system and water-coal-slurry supply system；The waste liquid supply system and water-coal-slurry supply
System is answered to be connected to respectively with the feed liquid passage, to be simultaneously or separately that the assembled nozzle supplies waste liquid and water-coal-slurry as sending
Enter the feed liquid of the feed liquid passage.
2. gasification system according to claim 1, which is characterized in that the coal dust burner is respectively central oxygen from inside to outside
Gas channel, the first burner cooling-water duct, coal dust channel and the second burner cooling-water duct；The center oxygen channel is described
The burner head of coal dust burner is provided with cyclone, for spraying oxygen by burner head with certain tangential and axial velocity
Out.
3. gasification system according to claim 2, which is characterized in that the number of the coal dust burner is three or four,
And the angle between the central axis of the coal dust burner and the central axis of the vaporizer is 0-15 °.
4. gasification system according to claim 3, which is characterized in that the coal dust burner is towards the vaporizer central axis
Setting, the angle between the central axis of the coal dust burner and the central axis of the vaporizer is 2-12 °.
5. gasification system according to claim 3 or 4, which is characterized in that it is equipped with water-cooling wall in the vaporizer, described group
The burner head on the burner head and the coal dust burner of closing burner is concordant in the water-cooling wall of burner seat lower end
Setting.
6. gasification system according to claim 5, which is characterized in that the lower part of the vaporizer is equipped with portion, shock chamber, institute
It states shock chamber and vaporizer is connected by cinder notch, for the synthesis gas from the vaporizer to be cooled down and washed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820819492.0U CN208964866U (en) | 2018-05-30 | 2018-05-30 | It is a kind of cooperation-gasified can dispose waste liquid, the gasification system of slurry and coal dust |
Applications Claiming Priority (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108485710A (en) * | 2018-05-30 | 2018-09-04 | 科林未来能源技术(北京)有限公司 | It is a kind of cooperation-gasified can dispose waste liquid, the gasification furnace and method of slurry and coal dust |
| CN113061470A (en) * | 2021-03-23 | 2021-07-02 | 山东明泉新材料科技有限公司 | Method for treating high-difficulty organic wastewater by using multi-nozzle pulverized coal gasification |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108485710A (en) * | 2018-05-30 | 2018-09-04 | 科林未来能源技术(北京)有限公司 | It is a kind of cooperation-gasified can dispose waste liquid, the gasification furnace and method of slurry and coal dust |
| CN113061470A (en) * | 2021-03-23 | 2021-07-02 | 山东明泉新材料科技有限公司 | Method for treating high-difficulty organic wastewater by using multi-nozzle pulverized coal gasification |
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