CN208279577U - Low-order coal pyrolysis gasification system - Google Patents
Low-order coal pyrolysis gasification system Download PDFInfo
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- CN208279577U CN208279577U CN201721893196.7U CN201721893196U CN208279577U CN 208279577 U CN208279577 U CN 208279577U CN 201721893196 U CN201721893196 U CN 201721893196U CN 208279577 U CN208279577 U CN 208279577U
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Abstract
The utility model discloses low-order coal pyrolysis gasification systems, it include: pulverized coal pyrolysis gasification furnace, high-temperature dust removing device and waste heat boiler, wherein, superposed pyrolysis chamber and the gasification chamber positioned at lower part are defined in pulverized coal pyrolysis gasification furnace, multiple heat accumulation type radiant tubes are disposed in pyrolysis chamber, the top for being pyrolyzed chamber has low-order coal entrance, the lower part of gasification chamber has oxygen inlet and steam inlet, bottom is exported with lime-ash, there is high-temperature oil gas outlet on side wall between pyrolysis chamber and gasification chamber, high-temperature dust removing device has high-temperature oil gas import and high temperature purification oil gas vent, high-temperature oil gas import is connected with high-temperature oil gas outlet；There is waste heat boiler high temperature purification oil and gas import, pyrolysis gas outlet, pyrolysis oil export, water inlet and steam (vapor) outlet, high temperature purification oil and gas import to be connected with high temperature purification oil gas vent.It can effectively realize that the cleaning of low-order coal, an efficient, step convert using the solution gasification system.
Description
Technical field
The utility model creation belongs to coal chemical technology more particularly to middle low-order coal pyrolysis gasification system.
Background technique
Coal is the main energy sources in China, is occupied an important position in primary energy structure.Low order coal reserves accounts for national spy
The 55% of bright coal reserves reaches 561,200,000,000 tons.Side chain is more in the chemical structure of low-order coal, and hydrogen and oxygen content are higher, as a result
Cause its volatile matter content high, can get high additional according to the high feature of its volatile matter and hydrogen content by being classified conversion
The oily gentle and chemicals of value, then remaining semicoke is burnt or gasified, realize the cascade utilization of coal resources.Low order at present
Pyrolysis is divided into two devices with gasification or burning mostly and carried out by coal utilization process, and whole efficiency drop is lower.So exploitation is a set of
Efficient pyrolysis gasifying device improves the oil-producing factor of created gase of low-order coal, realizes high efficiency of energy conversion.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality
It is to propose low-order coal pyrolysis gasification system with a novel purpose, can be realized the clear of low-order coal using the solution gasification system
Clean, efficient, step conversion.
One aspect according to the present utility model, the utility model proposes low-order coal pyrolysis gasification systems, according to this reality
With novel embodiment, the coal pyrolytic gasified system of low order includes:
Pulverized coal pyrolysis gasification furnace defines superposed pyrolysis chamber in the pulverized coal pyrolysis gasification furnace and is located at lower part
Gasification chamber, multiple heat accumulation type radiant tubes are disposed in the pyrolysis chamber, the top of the pyrolysis chamber has low-order coal
Entrance, the lower part of the gasification chamber have oxygen inlet and steam inlet, and bottom is exported with lime-ash, are located at the pyrolysis chamber
There is high-temperature oil gas outlet on side wall between room and the gasification chamber,
High-temperature dust removing device, the high-temperature dust removing device has high-temperature oil gas import and high temperature purification oil gas vent, described
High-temperature oil gas import is connected with high-temperature oil gas outlet；
Waste heat boiler, the waste heat boiler have high temperature purification oil and gas import, pyrolysis gas outlet, pyrolysis oil export, water into
Mouth and steam (vapor) outlet, the high temperature purification oil and gas import are connected with the high temperature purification oil gas vent.
Using the low-order coal pyrolysis gasification system of the utility model above-described embodiment, fine coal is crushed to certain particle size by powder
Coal pyrolytic gasified furnace roof portion enters pyrolysis chamber, issues raw pyrolytic reaction in heat accumulation type radiant tube heating condition, pyrolysis oil gas from
Export in the middle part of furnace body, the high-temperature semi-coke of generation, which is contacted into the gasification chamber in lower portion of furnace body with oxygen and steam, occurs combustion gas
Change reaction, generate coal gas of high temperature, main component is CO and H2, gasification reaction is strong exothermal reaction, and coal gas of high temperature is in uphill process
In semicoke counter current contacting with whereabouts, gas-solid exchanges heat, and semicoke absorbs the heat of coal gas of high temperature, and temperature increases, and then is pyrolyzed
Obtain CH4, pyrolysis oil.Finally convert coal high-efficiency cleaning to rich in H2、CO、CH4Unstripped gas, while by-product high added value
Aromatic hydrocarbons oil product.Due to the imperfect combustion heat release of semicoke, heat is provided for pyrolysis, efficiency is higher.Therefore, on the utility model
The low-order coal pyrolysis gasification system for stating embodiment finally realizes one step of the clean and effective conversion of coal.
In addition, can also be had according to the low-order coal pyrolysis gasification system of the utility model above-described embodiment following additional
Technical characteristic:
In the present invention, the steam (vapor) outlet is connected with the steam inlet.
In the present invention, the pyrolysis chamber accounts for the 1/3-1/2 of whole height in the pulverized coal pyrolysis gasification furnace.
In the present invention, the oxygen inlet and steam inlet are located at lime-ash outlet top distance 20-30cm
Place.
In the present invention, the low-order coal pyrolysis gasification system of above-described embodiment further comprises: pyrolysis gas purification dress
It sets, the pyrolysis air purifying apparatus is connected with the pyrolysis gas outlet.
Detailed description of the invention
Fig. 1 is the structural schematic diagram according to the low-order coal pyrolysis gasification system of the utility model one embodiment.
Fig. 2 is the structural schematic diagram according to the low-order coal pyrolysis gasification system of the utility model another embodiment.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
One aspect according to the present utility model, the utility model proposes low-order coal pyrolysis gasification systems, according to this reality
With novel embodiment, as shown in Figure 1, the coal pyrolytic gasified system of low order includes: pulverized coal pyrolysis gasification furnace 100, high-temperature dust removal
Device 200 and waste heat boiler 300.
Specific embodiment according to the present utility model defines superposed pyrolysis chamber in pulverized coal pyrolysis gasification furnace 100
Room 110 and gasification chamber 120 positioned at lower part are pyrolyzed in chamber 110 and are disposed with multiple heat accumulation type radiant tubes 111, are pyrolyzed chamber
Top there is low-order coal entrance 112, the lower part of gasification chamber 120 has oxygen inlet 121 and steam inlet 122, bottom tool
There is lime-ash to export 123, there is high-temperature oil gas outlet 130 on the side wall between pyrolysis chamber and gasification chamber；High-temperature dust removal
Device 200 has high-temperature oil gas import 210 and high temperature purification oil gas vent 220, and high-temperature oil gas import 210 and high-temperature oil gas export
130 are connected；Waste heat boiler 300 has high temperature purification oil and gas import 310, pyrolysis gas outlet 320, pyrolysis oil export 330, water inlet
340 and steam (vapor) outlet 350, high temperature purification oil and gas import 310 be connected with high temperature purification oil gas vent 220.
Using the low-order coal pyrolysis gasification system of the utility model above-described embodiment, fine coal is crushed to certain particle size by powder
Coal pyrolytic gasified furnace roof portion enters pyrolysis chamber, issues raw pyrolytic reaction in heat accumulation type radiant tube heating condition, pyrolysis oil gas from
Export in the middle part of furnace body, the high-temperature semi-coke of generation, which is contacted into the gasification chamber in lower portion of furnace body with oxygen and steam, occurs combustion gas
Change reaction, generate coal gas of high temperature, main component is CO and H2, gasification reaction is strong exothermal reaction, and coal gas of high temperature is in uphill process
In semicoke counter current contacting with whereabouts, gas-solid exchanges heat, and semicoke absorbs the heat of coal gas of high temperature, and temperature increases, and then is pyrolyzed
Obtain CH4, pyrolysis oil.Finally convert coal high-efficiency cleaning to rich in H2、CO、CH4Unstripped gas, while by-product high added value
Aromatic hydrocarbons oil product.Due to the imperfect combustion heat release of semicoke, heat is provided for pyrolysis, efficiency is higher.Therefore, on the utility model
The low-order coal pyrolysis gasification system for stating embodiment finally realizes one step of the clean and effective conversion of coal.
The low-order coal pyrolysis gasification system of the utility model specific embodiment is described in detail below with reference to Fig. 1.
Pulverized coal pyrolysis gasification furnace
Specific embodiment according to the present utility model defines superposed pyrolysis chamber in pulverized coal pyrolysis gasification furnace 100
Room 110 and gasification chamber 120 positioned at lower part are pyrolyzed in chamber 110 and are disposed with multiple heat accumulation type radiant tubes 111, are pyrolyzed chamber
Top there is low-order coal entrance 112, the lower part of gasification chamber 120 has oxygen inlet 121 and steam inlet 122, bottom tool
There is lime-ash to export 123, there is high-temperature oil gas outlet 130 on the side wall between pyrolysis chamber and gasification chamber.
Low order fine coal is supplied by low-order coal entrance 112 to the pyrolysis chamber 110 in pulverized coal pyrolysis gasification furnace as a result, is being stored
The heating of hot type radiant tube 111 issues raw pyrolytic reaction, is pyrolyzed high-temperature oil gas outlet 130 export of the oil gas in the middle part of furnace body, heat
The high-temperature semi-coke that solution generates enters the oxygen being passed through in gasification chamber 120 with oxygen inlet 121 and steam inlet 122 and steam connects
Combustion gasification reaction is touched and occurs, gasification reaction is strong exothermal reaction, and generation main component is CO and H2Coal gas of high temperature.High temperature
Semicoke counter current contacting of the coal gas in uphill process with whereabouts, gas-solid exchange heat, and semicoke absorbs the heat of coal gas of high temperature, temperature
It increases, and then is pyrolyzed and obtains CH4, pyrolysis oil by high-temperature oil gas outlet 130 discharge, combustion gasification reaction after lime-ash by bottom
Lime-ash outlet 123.Therefore, low order fine coal is eventually converted to after the processing of pulverized coal pyrolysis gasification furnace 100 rich in H2、CO、CH4
Unstripped gas, while the aromatic hydrocarbons oil product of by-product high added value.And the single step conversion of pulverized coal pyrolysis gasification furnace 100, significantly mention
High efficiency and cleannes, reduce energy consumption and pollution.
Specific embodiment according to the present utility model, in pulverized coal pyrolysis gasification furnace 100, superposed pyrolysis chamber accounts for powder
The 1/3-1/2 of whole height in coal pyrolytic gasified furnace.The ratio for being pyrolyzed chamber and gasification chamber is drawn thus according to needs
Divide and coordinate, low-order coal is pyrolyzed completely, to realize the efficient single step conversion of low-order coal, improves gas yield.
Specific embodiment according to the present utility model, oxygen inlet 121 and steam inlet 122 are located in lime-ash outlet 123
At side distance 20-30cm.And then can be under the premise of fully ensuring that oxygen and steam do not come out of the stove external by ash and clinker zone, maximum limit
Degree ground increases the time that oxygen and steam are inversely contacted with semicoke, so that the semicoke of bottom is in the combustion gas that exothermicity occurs
Change the coal gas of high temperature generated after reaction when rising to top, plays the role of heating to semicoke, it further will be not hot in semicoke
The volatile matter that solution is completed extracts generation high-temperature oil gas, improves its conversion ratio and gas yield.
Specific embodiment according to the present utility model, since the burnup gasification reaction of semicoke is exothermic reaction, and then can be with
Semicoke, which is directly applied to, using the heat that coal-char combustion gasification generates even is pyrolyzed the coal dust not being pyrolyzed completely in chamber, Jin Erke
To further decrease energy consumption.
High-temperature dust removing device
Specific embodiment according to the present utility model, high-temperature dust removing device 200 have high-temperature oil gas import 210 and high temperature net
Change oil gas vent 220, high-temperature oil gas import 210 is connected with high-temperature oil gas outlet 130.High-temperature oil gas high temperature is passed through as a result, to remove
Purified treatment is carried out in dirt device 200, to obtain high temperature purification oil gas.And then high-temperature oil gas is carried out at separation convenient for subsequent
Reason.
Waste heat boiler
Specific embodiment according to the present utility model, waste heat boiler 300 have high temperature purification oil and gas import 310, pyrolysis gas
Outlet 320, pyrolysis oil export 330, water inlet 340 and steam (vapor) outlet 350, high temperature purification oil and gas import 310 and high temperature purification oil
Gas outlet 220 is connected.High temperature purification oil gas is supplied to progress waste heat recycling in waste heat boiler, to obtain pyrolysis oil as a result,
And pyrolysis gas, and generate vapor.And then the heat of high temperature purification oil gas can be effectively recycled, avoid energy waste.
Specific embodiment according to the present utility model, the steam (vapor) outlet 350 and pulverized coal pyrolysis gasification furnace of waste heat boiler 300
100 steam inlet 122 is connected.It is possible thereby to which the steam generated using the heat of recycling high temperature purification oil gas is used for low-order coal
Combustion gasification reaction in pulverized coal pyrolysis gasification furnace 100, and then the heat recovery for the high-temperature oil gas that low-order coal generates is used for
The combustion gasification reaction of itself, eliminates outside and additionally supplies steam, reduce the processing energy consumption of low-order coal.
It is pyrolyzed air purifying apparatus
Specific embodiment according to the present utility model, as shown in Fig. 2, the low-order coal pyrolysis gasification system of above-described embodiment into
One step includes: pyrolysis air purifying apparatus 400, and pyrolysis air purifying apparatus 400 is connected with pyrolysis gas outlet 320.It is possible thereby into one
It walks and purified treatment is carried out to the pyrolysis gas after cooling, and then obtain purified gas product.
Specific embodiment according to the present utility model, as shown in Fig. 2, the low-order coal pyrolysis gasification system of above-described embodiment into
One step includes: oily-water seperating equipment 500, and oily-water seperating equipment 500 is connected with the pyrolysis oil export 330 of waste heat boiler 300, thus
Water in pyrolysis oil can be separated, and then obtain pure pyrolysis oil product.
In order to facilitate the low-order coal pyrolysis gasification system for understanding the utility model above-described embodiment, below to the utilization system
The method of processing low-order coal is described.
Specific embodiment according to the present utility model, this method comprises: being supplied low order fine coal by low-order coal entrance to powder
In coal pyrolytic gasified furnace, it is pyrolyzed low order fine coal in pyrolysis chamber, obtains high-temperature oil gas and semicoke；Semicoke is set to enter gasification
It contacts to form eddy flow fluidized state with steam and oxygen in chamber, and combustion gasification reaction occurs, generate coal gas of high temperature；It will pyrolysis
The high-temperature oil gas of generation, which is passed through in high-temperature dust removing device, carries out purified treatment, to obtain high temperature purification oil gas；By high temperature purification
Oil gas is supplied to progress waste heat recycling in waste heat boiler, to obtain pyrolysis oil and pyrolysis gas, and generates vapor.
Using the coal pyrolytic gasified method of the low order of the utility model above-described embodiment, fine coal be crushed to certain particle size by
Pulverized coal pyrolysis top of gasification furnace enters pyrolysis chamber, issues raw pyrolytic reaction in heat accumulation type radiant tube heating condition, is pyrolyzed oil gas
It is exported in the middle part of from furnace body, the high-temperature semi-coke of generation, which is contacted into the gasification chamber in lower portion of furnace body with oxygen and steam, burns
Gasification reaction, generates coal gas of high temperature, and main component is CO and H2, gasification reaction is strong exothermal reaction, and coal gas of high temperature was rising
The semicoke counter current contacting that Cheng Zhongyu falls, gas-solid exchange heat, and semicoke absorbs the heat of coal gas of high temperature, and temperature increases, further
Pyrolysis obtains CH4, pyrolysis oil.Finally convert coal high-efficiency cleaning to rich in H2、CO、CH4Unstripped gas, while by-product height is additional
The aromatic hydrocarbons oil product of value.Due to the imperfect combustion heat release of semicoke, heat is provided for pyrolysis, efficiency is higher.Therefore, this is practical new
The low-order coal pyrolysis gasification method of type above-described embodiment finally realizes one step of the clean and effective conversion of coal.
The low-order coal pyrolysis gasification system using preceding embodiment of the utility model specific embodiment is handled below low
The method of rank coal is described in detail.
Specific embodiment according to the present utility model, firstly, being supplied low order fine coal by low-order coal entrance to pulverized coal pyrolysis
In gasification furnace, it is pyrolyzed low order fine coal in pyrolysis chamber, obtains high-temperature oil gas and semicoke；Enter semicoke in gasification chamber
It contacts to form eddy flow fluidized state with steam and oxygen, and combustion gasification reaction occurs, generate coal gas of high temperature.
Low order fine coal is supplied by low-order coal entrance 112 to the pyrolysis chamber 110 in pulverized coal pyrolysis gasification furnace as a result, is being stored
The heating of hot type radiant tube 111 issues raw pyrolytic reaction, is pyrolyzed high-temperature oil gas outlet 130 export of the oil gas in the middle part of furnace body, heat
The high-temperature semi-coke that solution generates enters the oxygen being passed through in gasification chamber 120 with oxygen inlet 121 and steam inlet 122 and steam connects
Combustion gasification reaction is touched and occurs, gasification reaction is strong exothermal reaction, and generation main component is CO and H2Coal gas of high temperature, high temperature
Semicoke counter current contacting of the coal gas in uphill process with whereabouts, gas-solid exchange heat, and semicoke absorbs the heat of coal gas of high temperature, temperature
It increases, further pyrolysis obtains CH4, pyrolysis oil, and by high-temperature oil gas outlet 130 discharge, combustion gasification reaction after lime-ash by
The lime-ash outlet 123 of bottom.Therefore, low order fine coal is eventually converted to be rich in after the processing of pulverized coal pyrolysis gasification furnace 100
H2、CO、CH4Unstripped gas, while the aromatic hydrocarbons oil product of by-product high added value.And the single step of pulverized coal pyrolysis gasification furnace 100 turns
Change, significantly improves efficiency and cleannes, reduce energy consumption and pollution.
The partial size of specific embodiment according to the present utility model, low order fine coal to be processed is not more than 6mm.It is possible thereby to mention
Height is pyrolyzed efficiency, and oil gas can be exported quickly in pyrolytic process, reduces second pyrolysis reaction, tar yield and quality are more preferably.Separately
Outer small particle semicoke combustion gasification section reaction rate faster, the efficiency of coal-char combustion gasification reaction.
Specific embodiment according to the present utility model, low-order coal are taken the photograph in the temperature that pyrolysis chamber is pyrolyzed for 550-600
Family name's degree, within this temperature range, pyrolysis of coal tar yield reach peak value, realize higher tar yield.
Specific embodiment according to the present utility model, purifies secondly, high-temperature oil gas is passed through in high-temperature dust removing device
Processing, to obtain high temperature purification oil gas.And then separating treatment is carried out to high-temperature oil gas convenient for subsequent.
Specific embodiment according to the present utility model, by the temperature for the high-temperature oil gas being discharged in pulverized coal pyrolysis gasification furnace 100
It can achieve 700-800 degrees Celsius.The high temperature purification oil gas temperature obtained after high-temperature dust removing device carries out purified treatment is big
Generally at 650-750 degrees Celsius.Thus its heat is recycled, such as can use waste heat boiler and recycled, and obtains water
Steam.
For this purpose, specific embodiment according to the present utility model, finally, high temperature purification oil gas can be supplied to waste heat boiler
Interior progress waste heat recycling, to obtain pyrolysis oil and pyrolysis gas, and generates vapor.And then it can effectively recycle high temperature purification oil
The heat of gas, avoids energy waste.
Specific embodiment according to the present utility model, carrying out waste heat recycling to high temperature purification oil gas can produce 300-400
Degree Celsius high-temperature steam.
The pyrolysis gasification method of specific embodiment according to the present utility model, above-described embodiment further comprises: by waste heat
The vapor that the heat of boiler recycling high-temperature oil gas generates is supplied by vapor import to gasification chamber, the burning for semicoke
Gasification reaction.It is possible thereby to which the steam generated using the heat of recycling high temperature purification oil gas is used for low-order coal in pulverized coal pyrolysis gas
Change the combustion gasification reaction in furnace, and then the combustion gasification that the heat recovery for the high-temperature oil gas that low-order coal generates is used for itself is anti-
It answers, eliminates outside and additionally supply steam, reduce the processing energy consumption of low-order coal.
The pyrolysis gasification method of specific embodiment according to the present utility model, above-described embodiment further comprises: will be pyrolyzed
Gas is passed through pyrolysis air purifying apparatus 400 and carries out purified treatment, to obtain purified gas.It is possible thereby to further to the heat after cooling
It vents one's spleen and carries out purified treatment, and then obtain purified gas product.
The pyrolysis gasification method of specific embodiment according to the present utility model, above-described embodiment further comprises: will be pyrolyzed
Oil, which is passed through in oily-water seperating equipment 500, carries out water-oil separating, it is possible thereby to which the water in pyrolysis oil is separated, and then obtains pure
It is pyrolyzed oil product.
Under at least being had according to the low-order coal pyrolysis gasification system and pyrolysis gasification method of the utility model above-described embodiment
One of column advantage:
(1) semicoke is directly applied to using the heat that coal-char combustion gasification generates, or even be applied to not complete in pyrolysis chamber
In the coal dust being pyrolyzed entirely, and then further decrease energy consumption.
(2) can high efficient and flexible control pyrolysis, gasification degree, oil, gas, char yeild can adjust significantly, market adaptability
It is stronger.
(3) the high characteristic of middle low-order coal high volatile, activity is preferably utilized, utmostly converts middle low-order coal to
Petroleum and gas resources.
(4) consumption fuel quantity reduces, and investment operating cost reduces, and economy is more preferable.
Embodiment
By taking low-order coal as an example, low-order coal main character is as follows:
Table 1
| Project | Unit | Numerical value | Remarks |
| Quan Shui | % | 10 | As-received |
| Fixed carbon | % | 46 | As-received |
| Volatile matter | % | 37 | As-received |
| Ash content | % | 7 | As-received |
Be by partial size < the low order fine coal of 6mm is added from heat accumulating type pulverized coal pyrolysis top of gasification furnace, heat accumulation type radiant tube uses
For fuel gas with low heat value as unstripped gas, pyrolysis temperature is 600 DEG C.Heat accumulating type pulverized coal pyrolysis gasification furnace lower part is fallen under middle low temperature semicoke
With vertically into steam contact to form eddy flow fluidized state with oxygen, occur combustion gasification reaction, temperature is at 1050 DEG C.Semicoke
The coal gas of high temperature rising that combustion gasification generates is contacted with middle low temperature semicoke carries out gas-solid heat exchange, further by not being pyrolyzed in semicoke
The volatile matter of completion extracts generation oil gas.Heat accumulating type pulverized coal pyrolysis gasification furnace raw coke oven gas outlet temperature is at 750 DEG C, into height
The dust of entrainment is removed in warm deduster.High temperature raw gas temperature is at 700 DEG C derived from hot precipitator, more than coal gas
Heat recovery apparatus, carrying out heat exchange with the soft water of entrance makes 350 DEG C of steam of water generation be sent into heat accumulating type fine coal as gasifying agent
Pyrolysis gasification furnace lower part.After heat exchange raw coke oven gas enters the desulfurization of raw coke oven gas purification system, deamination, de- benzene, de- naphthalene are purified
It is pyrolyzed coal gas, grease is generated and enters oil-water recovering device recycling tar as product.
Table 2
| Product | Yield % (coal base) |
| Lime-ash | 9 |
| Tar | 8.5 |
| Coal gas | 74.9 |
| It is pyrolyzed water | 7.6 |
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
Identical embodiment or example need not be directed to by stating.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiment or examples.In addition, without conflicting with each other, this field
Technical staff can carry out the feature of different embodiments or examples described in this specification and different embodiments or examples
Combination and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (5)
1. a kind of low-order coal pyrolysis gasification system characterized by comprising
Pulverized coal pyrolysis gasification furnace defines superposed pyrolysis chamber and the gas positioned at lower part in the pulverized coal pyrolysis gasification furnace
To change chamber, multiple heat accumulation type radiant tubes are disposed in the pyrolysis chamber, the top of the pyrolysis chamber has low-order coal entrance,
The lower part of the gasification chamber have oxygen inlet and steam inlet, bottom have lime-ash export, be located at the pyrolysis chamber and
There is high-temperature oil gas outlet on side wall between the gasification chamber,
High-temperature dust removing device, the high-temperature dust removing device have high-temperature oil gas import and high temperature purification oil gas vent, the high temperature
Oil and gas import is connected with high-temperature oil gas outlet；
Waste heat boiler, the waste heat boiler have high temperature purification oil and gas import, pyrolysis gas outlet, pyrolysis oil export, water inlet and
Steam (vapor) outlet, the high temperature purification oil and gas import are connected with the high temperature purification oil gas vent.
2. low-order coal pyrolysis gasification system according to claim 1, which is characterized in that the steam (vapor) outlet and the steam
Import is connected.
3. low-order coal pyrolysis gasification system according to claim 1, which is characterized in that the pyrolysis chamber accounts for the fine coal
The 1/3-1/2 of whole height in pyrolysis gasification furnace.
4. low-order coal pyrolysis gasification system according to claim 1, which is characterized in that the oxygen inlet and steam inlet
It is exported at the distance 20-30cm of top positioned at the lime-ash.
5. low-order coal pyrolysis gasification system according to claim 1, which is characterized in that further comprise:
It is pyrolyzed air purifying apparatus, the pyrolysis air purifying apparatus is connected with the pyrolysis gas outlet.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108034458A (en) * | 2017-12-28 | 2018-05-15 | 北京神雾电力科技有限公司 | Low-order coal pyrolysis gasification system and pyrolysis gasification method |
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| CN108034458A (en) * | 2017-12-28 | 2018-05-15 | 北京神雾电力科技有限公司 | Low-order coal pyrolysis gasification system and pyrolysis gasification method |
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