CN117327511A - Down-flow full waste boiler entrained flow dry ash removal gasification furnace for treating salt-containing wastewater - Google Patents
Down-flow full waste boiler entrained flow dry ash removal gasification furnace for treating salt-containing wastewater Download PDFInfo
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- CN117327511A CN117327511A CN202311517185.9A CN202311517185A CN117327511A CN 117327511 A CN117327511 A CN 117327511A CN 202311517185 A CN202311517185 A CN 202311517185A CN 117327511 A CN117327511 A CN 117327511A
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- waste
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- gas
- salt
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- 239000002699 waste material Substances 0.000 title claims abstract description 142
- 239000002351 wastewater Substances 0.000 title claims abstract description 93
- 150000003839 salts Chemical class 0.000 title claims abstract description 91
- 238000002309 gasification Methods 0.000 title description 22
- 239000002893 slag Substances 0.000 claims abstract description 99
- 230000005855 radiation Effects 0.000 claims abstract description 34
- 238000002485 combustion reaction Methods 0.000 claims abstract description 22
- 239000011449 brick Substances 0.000 claims abstract description 4
- 239000002956 ash Substances 0.000 claims description 192
- 239000007789 gas Substances 0.000 claims description 187
- 238000001816 cooling Methods 0.000 claims description 78
- 230000015572 biosynthetic process Effects 0.000 claims description 36
- 238000003786 synthesis reaction Methods 0.000 claims description 35
- 238000010926 purge Methods 0.000 claims description 28
- 238000010791 quenching Methods 0.000 claims description 18
- 239000004071 soot Substances 0.000 claims description 15
- 238000007664 blowing Methods 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- 230000000171 quenching effect Effects 0.000 claims description 11
- 241000237942 Conidae Species 0.000 claims description 10
- 239000000112 cooling gas Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 4
- 239000010882 bottom ash Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000012267 brine Substances 0.000 claims 2
- 238000001035 drying Methods 0.000 claims 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 33
- 238000004065 wastewater treatment Methods 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 description 15
- 238000005406 washing Methods 0.000 description 9
- 239000003245 coal Substances 0.000 description 8
- 238000007599 discharging Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000005465 channeling Effects 0.000 description 3
- 239000003250 coal slurry Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 244000181980 Fraxinus excelsior Species 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010884 boiler slag Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/485—Entrained flow gasifiers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/52—Ash-removing devices
- C10J3/526—Ash-removing devices for entrained flow gasifiers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/86—Other features combined with waste-heat boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/12—Radiant burners
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/169—Integration of gasification processes with another plant or parts within the plant with water treatments
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The embodiment of the invention provides a dry ash removal gasifier for a downstream full waste pot entrained flow bed for treating salt-containing waste water, and relates to the field of gasifiers. The device comprises a combustion chamber, a radiation waste pot, a chilling chamber, an inclined upward sleeve, a convection waste pot and a dry ash removal device, wherein the combustion chamber is in a water-cooled wall or a furnace brick, a slag hole is formed in the bottom of the combustion chamber, the slag hole is communicated with the radiation waste pot, and the bottom of the radiation waste pot is communicated with the chilling chamber; the gas phase outlet of the radiation waste pot is communicated with the convection waste pot through an inclined upward sleeve pipe, and the outlet of the convection waste pot is communicated with the dry ash removing device; the slag outlet is provided with a salt-containing wastewater ring and a slag guide pipe, the salt-containing wastewater ring is provided with a plurality of branches for providing salt-containing wastewater, the bottom of the salt-containing wastewater ring is provided with a vertical downward water outlet, and the outer ring of the salt-containing wastewater ring is connected with the slag guide pipe. The invention can solidify ash, reduce the risk of slag receiving and sticking of the waste boiler, recover the sensible heat of the synthetic gas at high temperature as much as possible, and thoroughly solve the problem of salt-containing wastewater treatment.
Description
Technical Field
The invention relates to the field of gasifiers, in particular to a dry ash removal gasifier for a downstream full waste boiler entrained flow bed for treating salt-containing wastewater.
Background
The prior gasification furnace for treating the salt-containing wastewater is mainly a coal water slurry gasification furnace:
the method is characterized in that salt-containing wastewater is used for preparing coal water slurry, the coal slurry reacts with pure oxygen in a furnace to generate high-temperature synthesis gas, and excessive water (the water is brought into the coal slurry) is vaporized, so that salt-containing and silicon-containing solubles in the wastewater are separated out, a very small part of the solubles are wrapped in coarse slag, a large part of the solubles are independent of the coarse slag and fine slag, and finally the solubles are dissolved in system water, so that the function of substantially treating the salt-containing wastewater is not realized.
The prior entrained flow gasifier for ash treatment by a dry method is an uplink waste boiler:
the upward waste boiler can only improve the water quality of the system, and under the same load of the gasification furnace with the same coal feeding amount, the outward drainage of the system is reduced, but the salt-containing waste water can not be thoroughly solved, namely, the substantial zero emission is not achieved, and moreover, the upward waste boiler gasification furnace generates upward synthetic gas and downward slag. Slag enters a chilling chamber downwards through a slag port (throat pipe), falls into a water bath, is chilled and cooled and is discharged, and synthesis gas is discharged at an outlet of the gasification furnace, so that a large amount of chilling gas (the gas generated by the gasification furnace after dust removal, temperature reduction and pressurization) is used for reducing the temperature of the synthesis gas and molten ash carried by the synthesis gas, preventing the synthesis gas from upwards carrying molten ash and entering a convection waste pot to be adhered to a water cooling wall, and heat exchange and blocking of a synthesis gas channel are affected. There are major problems: (1) the chilling gas quantity of the synthetic gas is about 1/3 of the gas yield of the gasification furnace, and the gasification furnace and an accessory system are designed under normal design, and must be increased by 30 percent, so that the production capacity per unit volume is low; meanwhile, the generated synthetic gas needs to be cooled and pressurized and then returns to the convection waste boiler, so that the energy consumption is high; (2) the downward flowing of slag depends on gravity only, the flow speed is low, the requirement on the size of a slag hole (a slag discharging section) is harsh, the large back mixing effect of the slag hole is poor, the carbon conversion rate is affected, the slag hole is small, and the slag hole is easy to block, so that under certain slag hole size and certain load, the adaptability requirement on coal is harsh, the operation window of the coal is required to be higher than 120 ℃, and the smooth slag discharge at the slag hole is ensured.
Meanwhile, the descending entrained flow dry ash removal gasification furnace has no industrial operation precedent.
In view of this, the present application is specifically proposed.
Disclosure of Invention
The invention aims at providing a downstream full waste boiler entrained flow dry ash removal gasifier for treating salt-containing waste water, for example.
Embodiments of the invention may be implemented as follows:
in a first aspect, the invention provides a dry ash removal gasifier of a downlink full waste boiler entrained flow bed for treating salt-containing wastewater, which comprises a combustion chamber, a radiation waste boiler, a chilling chamber, an inclined upward sleeve, a convection waste boiler and a dry ash removal device, wherein the combustion chamber is in a water-cooled wall or a furnace brick structure, a slag hole is arranged at the bottom of the combustion chamber, the slag hole is communicated with the radiation waste boiler, and the bottom of the radiation waste boiler is communicated with the chilling chamber; the gas phase outlet of the radiant waste boiler is communicated with the convection waste boiler through the inclined upward jacket pipe, and the outlet of the convection waste boiler is communicated with the dry ash removal device;
the slag notch department is provided with and contains salt waste water ring and sediment stand pipe, contain salt waste water ring and be provided with many branch road that are used for providing containing salt waste water, contain the bottom of salt waste water ring and be provided with vertical decurrent delivery port, contain the outer lane of salt waste water ring with the sediment stand pipe is connected.
In an optional embodiment, a first water-cooling wall and a second water-cooling wall are arranged in the radiation waste boiler, the second water-cooling wall is positioned on the outer side of the first water-cooling wall, the first water-cooling wall encloses a central channel, the center is communicated with the slag hole, a foldback channel is formed between the first water-cooling wall and the second water-cooling wall, and the inclined upward jacket pipe is communicated with the top of the foldback channel;
preferably, the first water-cooling wall and the second water-cooling wall are both provided with rappers for ash removal;
preferably, a chilling gas inlet for abnormal overtemperature protection is arranged at the inlet of the foldback channel;
preferably, the top of the foldback channel is provided with a soot blowing gas inlet.
In an alternative embodiment, the length of the second water-cooling wall is greater than that of the first water-cooling wall, the lower end of the second water-cooling wall is inwardly closed to form a cone shape, an annular baffle plate and a liquid level protection gas inlet are arranged at the position, corresponding to the closing-in position of the second water-cooling wall, of the inner wall of the radiation waste pot, an annular ajar closing plate is arranged above the closing-in position of the second water-cooling wall, the annular ajar closing plate is positioned between the second water-cooling wall and the inner wall of the radiation waste pot, and the annular ajar closing plate can selectively close or open a channel between the second water-cooling wall and the inner wall of the radiation waste pot so as to automatically balance the gas amount;
preferably, the annular ajar closing plate is connected with the inner wall of the radiation waste pot through a spring.
In an alternative embodiment, a plurality of groups of heat exchange fins are arranged in the foldback channel;
preferably, the number of the heat exchange fins is 8-16, and each group of the heat exchange fins is 4-6.
In an optional embodiment, the down full waste pan entrained flow dry ash removal gasifier for treating salt-containing waste water further comprises a cyclone separator, wherein the cyclone separator is communicated between the inclined upward jacketed pipe and the convection waste pan, an air outlet of the cyclone separator is communicated with the convection waste pan, and an ash outlet of the cyclone separator is communicated with the dry ash removal device.
In an alternative embodiment, the cyclone separator comprises a separation chamber, a cone pipe and a cone shell, wherein the bottom of the separation chamber is contracted into a cone shape, the cone pipe is connected to the lower side of the separation chamber, the cone shell is connected to the contracted position of the separation chamber, the cone pipe is positioned in the cone shell, the top of the cone shell is provided with a purge gas inlet, the bottom of the cone shell is provided with three temperature detection elements with different heights, an air inlet pipeline of the purge gas inlet is provided with a preheating purge protection gas pipeline and a cooling gas pipeline, and a control valve group is arranged on the cooling gas pipeline and is connected with the temperature detection elements.
In an alternative embodiment, the dry ash removal device comprises an ash collection tank, an ash discharge tank filter, an ash cooler and an ash bin, wherein the ash filter is arranged at the top of the ash collection tank, the ash filter is communicated with the outlet of the cyclone separator and the outlet of the convection waste pot, the ash collection tank is communicated with the outlet of the ash filter, the ash discharge tank is communicated with the outlet of the ash collection tank, the ash discharge tank filter is communicated with the top gas outlet of the ash discharge tank, the ash cooler is communicated with the bottom ash outlet of the ash discharge tank, and the ash bin is communicated with the ash cooler;
preferably, the discharge tank is provided with a high-pressure air inlet for improving the pressure in the discharge tank, a high-pressure balance valve is arranged between the ash collecting tank and the ash discharge tank, a pressure regulating valve is arranged at the outlet of the discharge tank filter, and a low-pressure balance valve is arranged between the ash discharge tank and the ash cooler;
preferably, the ash cooler is provided with a water-cooled wall heat exchange tube group and a low-pressure nitrogen inlet;
preferably, an ash cooling steam drum is further arranged above the ash cooler, and an inlet and an outlet of the water-cooled wall heat exchange tube group are connected with the ash cooling steam drum.
In an alternative embodiment, the downstream all-waste-pot entrained-flow dry ash removal gasifier for treating salt-containing wastewater further comprises a shielding gas buffer tank for providing soot blowing gas, quenching gas and purge gas.
In an alternative embodiment, the shielding gas buffer tank is further provided with a shielding gas preheater for heating the gas, and the shielding gas used by the combustion chamber, the radiant waste cooker and the convection waste cooker is heated by the shielding gas preheater.
In an alternative embodiment, the downstream full waste pan entrained flow dry ash removal gasification furnace for treating salt-containing waste water further comprises a synthesis gas washing tower, wherein a middle feed inlet of the synthesis gas washing tower is communicated with a top air outlet of the dry ash removal device, a top air outlet of the synthesis gas washing tower is communicated with a protective gas compressor, and the protective gas compressor is communicated with the protective gas buffer tank.
The beneficial effects of the embodiment of the invention include, for example:
the embodiment of the invention provides a down full waste pot entrained flow dry ash removal gasification furnace for treating salt-containing wastewater, which can realize the cooling of synthetic gas and slag entering a radiation waste pot by utilizing the salt-containing wastewater by arranging a salt-containing wastewater ring and a slag guide pipe at a slag outlet, so that the integral temperature is reduced from about 1450 ℃ to 950-1150 ℃ which is lower than the melting point of common slag, the slag is solidified, and the risks of slag receiving and slag sticking of the waste pot are greatly reduced; meanwhile, the waste water discharged from the salt-containing waste water ring flows downwards uniformly along the inner wall of the slag guide pipe, and heat is transferred in the process of parallel downwards flowing of the salt-containing waste water, high-temperature slag and synthetic gas, so that water in the salt-containing waste water is gasified into steam, namely, the water-gas ratio of the synthetic gas in the waste boiler is increased, the water-gas ratio of a downstream conversion device is ensured, and the salt-containing silicon and other dissolved matters are separated out, most of the separated matters and fine ash are discharged in a solid form along with the synthetic gas in a dry ash removal system, the problem of disposal of the salt-containing waste water is thoroughly solved, the temperature of the synthetic gas at the inlet of the waste boiler is reduced to be within 1000 ℃ after the salt-containing waste water is added, the heat exchange pressure of the radiation waste boiler is greatly reduced, and the fin water cooling wall arranged in the central channel of the traditional radiation waste boiler is cancelled, so that the radiation waste boiler has a simple structure, and the problems of slag and slag adhesion in the waste boiler are thoroughly solved from the root. The downlink full waste pan entrained flow dry ash removal gasification furnace for treating the salt-containing wastewater can thoroughly solve the problem of salt-containing wastewater treatment, the sensible heat of the synthetic gas at high temperature is recovered as much as possible, the waste pan channel of the gasification furnace has the advantages of simple structure, large central channel, small slag bonding and slag bonding risks, and the technology has the advantages of safe and reliable operation, high online operation rate, convenient operation and maintenance, low operation economic cost, low comprehensive energy consumption and the like, and greatly improves the economic value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a dry ash removal gasifier of a downstream full waste boiler entrained flow bed for treating salt-containing wastewater according to the present embodiment;
FIG. 2 is a schematic diagram of the structure of a combustion chamber and a radiant waste boiler in the fluidized bed dry ash removal gasifier of the downstream total waste boiler for treating salt-containing wastewater provided in the present embodiment;
fig. 3 is a partial enlarged view at a in fig. 2.
Icon: 100-a descending full waste boiler entrained flow dry ash removal gasification furnace for treating salt-containing waste water; 110-a combustion chamber; 111-a slag outlet; 112-salt-containing wastewater ring; 113-slag guide pipe; 120-radiating a waste pot; 121-a first water-cooled wall; 122-a second water wall; 123-central channel; 124-reentrant pathway; 1241-heat exchange fins; 125-chilled gas inlet; 126-soot blowing air ports; 127-annular baffles; 128-liquid level shielding gas inlet; 129-annular ajar closure plates; 130-a quench chamber; 140-obliquely upward clamping the sleeve; 150-cyclone separator; 151-separation chamber; 152-taper pipe; 153-cone housing; 154-purge gas inlet; 155-a temperature detecting element; 156-preheating a purge guard gas line; 157-cooling gas line; 160-convection waste pan; 170-a dry ash removal device; 171-ash collection tank; 1711-ash filter; 172-ash discharge tank; 173-a discharge tank filter; 174-ash cooler; 1741-water-cooled wall heat exchange tube groups; 1742-low pressure nitrogen inlet; 175-ash bin; 176-high pressure balancing valve; 177-pressure regulating valve; 178-low pressure balancing valve; 179-ash cooling drum; 180-a protective gas buffer tank; 181-a shielding gas preheater; 182-a shielding gas compressor; 190-syngas scrubber.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Examples
Referring to fig. 1 and 2, the present embodiment provides a down full waste pan entrained flow dry ash removal gasifier 100 for treating salt-containing wastewater, which includes a combustion chamber 110, a radiant waste pan 120, a quench chamber 130, an inclined upward jacket pipe 140, a cyclone 150, a convection waste pan 160, a dry ash removal device 170, a shielding gas buffer tank 180, a shielding gas preheater 181, and a syngas scrubber 190.
The combustion chamber 110 is used for burning dry coal dust or coal water slurry to generate synthesis gas, the combustion chamber 110 is in a water-cooled wall or a furnace brick structure, and the combustion chamber 110 adopts a top single burner (not shown), a top multiple burner (not shown), a side multiple burner, or a top and side multiple burner mode to set the burner. The bottom of the combustion chamber 110 is provided with a slag hole 111, the slag hole 111 is communicated with the radiant waste boiler 120, and qualified high-temperature synthetic gas generated by the combustion chamber 110 enters the radiant waste boiler 120 through the slag hole 111. In this embodiment, a salt-containing wastewater ring 112 and a slag guide pipe 113 are disposed at the slag outlet 111, the salt-containing wastewater ring 112 is provided with a plurality of branches for providing salt-containing wastewater, a vertically downward water outlet (not shown) is disposed at the bottom of the salt-containing wastewater ring 112, and an outer ring of the salt-containing wastewater ring 112 is connected with the slag guide pipe 113.
The vertical downward even distribution of the salt-containing wastewater ring 112 is arranged at the inner corners of the water-cooled wall coil pipe of the slag hole 111 and the horizontal wall water-cooled wall of the radiant waste boiler 120, so that the ablation and the scouring of the salt-containing wastewater ring 112 by high-temperature synthetic gas can be effectively avoided; the water outlet of the salt-containing wastewater ring 112 is connected to the slag guide pipe 113 of the nickel-based pipe with the water-cooled wall coil, the slag guide pipe 113 has multiple purposes, firstly, has a slag guide function, and the overlong length affects the heat exchange efficiency of the waste boiler, and the excessively short slag containing mat is easy to adhere to the waste boiler horizontal wall, so that the length of the slag guide pipe 113 in the embodiment is 0.8D-2D; secondly, slag is wrapped, so that the diffusion angle is reduced, namely the horizontal force is reduced or eliminated, and the slag is prevented from being adhered to the water cooling wall; thirdly, the waste water discharged from the salt-containing waste water ring 112 which is vertically and evenly distributed downwards flows downwards along the inner wall of the slag guide pipe 113, heat is transferred in the parallel downwards flowing process of the salt-containing waste water, high-temperature slag and synthetic gas, so that water in the salt-containing waste water is gasified into steam, the water-gas ratio of the synthetic gas in the waste pot is increased, the dissolved substances such as salt-containing and silicon are separated out, most of the separated substances and fine ash are discharged in a solid form along with the synthetic gas entering a dry ash removing system, the problem that the salt-containing waste water is added from the side surface to cause excessive local water or change the direction of local synthetic gas and slag, finally, slag bonding of the waste pot is caused is thoroughly solved, meanwhile, the problem of disposal of the salt-containing waste water is realized, and secondly, the synthetic gas and slag are cooled after the salt-containing waste water is evenly added in the center of the waste pot, so that the overall temperature is reduced from 1450 ℃ to 950-1150 ℃ below the melting point of general slag, the slag is solidified, and the slag bonding risks of the waste pot are greatly reduced.
The radiation waste pot 120 is used for heat exchanging to high-temperature synthesis gas, fins are arranged in the radiation waste pot 120 to strengthen the heat exchanging force under the conventional condition, but in the embodiment, the temperature of the synthesis gas at the inlet of the waste pot is about 950-1150 ℃ after the salt-containing wastewater is added, so that the heat exchanging pressure of the radiation waste pot 120 is greatly reduced, fins are not arranged in the radiation waste pot 120 to strengthen the heat exchanging force, the radiation waste pot 120 is simple in structure, no slag hidden trouble point exists in the radiation waste pot, meanwhile, the central channel 123 is enlarged, and the problems of slag and sticking in the waste pot are radically and thoroughly solved.
Specifically, in the present embodiment, a first water-cooling wall 121 and a second water-cooling wall 122 are disposed in the radiant waste boiler 120, the first water-cooling wall 121 and the second water-cooling wall 122 are both annular, the second water-cooling wall 122 is located at the outer side of the first water-cooling wall 121, the first water-cooling wall 121 encloses a central channel 123, the center is communicated with the slag hole 111, a foldback channel 124 is formed between the first water-cooling wall 121 and the second water-cooling wall 122, and the inclined upward jacket pipe 140 is communicated with the top of the foldback channel 124; the high-temperature synthetic gas enters a channel surrounded by the first water cooling wall 121 through the slag hole 111, the synthetic gas subjected to heat exchange moves upwards through the foldback channel 124 and is discharged into the inclined upward jacket pipe 140, and slag in the synthetic gas falls into the chilling chamber 130 below the radiation waste pan 120 for cooling and then is discharged. In this embodiment, rappers (not shown) for ash removal are disposed on both the first water-cooled wall 121 and the second water-cooled wall 122; the rapper can remove fine ash adhering to the first water wall 121 and the second water wall 122, so that the fine ash falls into the quench chamber 130 below the radiant waste boiler 120.
A chilling gas inlet 125 for abnormal overtemperature protection is arranged at the inlet of the foldback channel 124; and two sets of temperature detecting means, each set having 4-12 temperature detecting elements 155, are provided within 500mm and 8000mm of the entrance of the obliquely upward chuck tube 140, respectively. The synthesis gas is discharged from the foldback channel 124 and enters the subsequent inclined upward sleeve 140, the cyclone separator 150 and the convection waste pot 160, after one-step heat exchange and cooling, dry ash removal and water washing and dust removal, the synthesis gas enters the conversion device, the hydrogen-carbon ratio required by the downstream device is regulated, and most of the synthesis gas is sent to the downstream device after water removal, a small part of synthesis gas enters the protective gas compressor 182 for pressurization and then enters the protective gas buffer tank 180, the protective gas compressor 182 adopts a variable load compressor, namely the load size is selected according to the pressure of the protective gas buffer tank 180, and the normal small load operation is performed. When the temperature detection element 155 detects temperature abnormality (more than 750 ℃) due to coal quality or other reasons, the quenching gas can be introduced into the quenching gas inlet 125, and the quenching gas can realize that the compressor is automatically switched to large-load operation when the synthetic gas at the inlet of the doubling back channel 124 is subjected to large-air purging and cooling, after the working condition is recovered to be normal, the compressor is automatically switched to small-load operation, meanwhile, in order to prevent the quenching gas port at the turning point of the waste boiler from being blocked for a long time, a bypass with a current-limiting pore plate is arranged on the quenching gas cut-off valve, the quenching gas is used for blowing in a normal operation period, the blockage of the quenching gas port is prevented, and the energy consumption is reasonably designed to be the lowest. Further, in the present embodiment, the top of the foldback channel 124 is provided with a soot blowing port 126.
Referring to fig. 2 and 3, the length of the second water-cooling wall 122 is greater than that of the first water-cooling wall 121, the lower end of the second water-cooling wall 122 is inwardly closed to form a cone shape, an annular baffle 127 and a liquid level protecting gas inlet 128 are arranged at the position, corresponding to the closing position of the second water-cooling wall 122, of the inner wall of the radiant waste boiler 120, an annular micro-opening closing plate 129 is arranged above the closing position of the second water-cooling wall 122, the annular micro-opening closing plate 129 is positioned between the second water-cooling wall 122 and the inner wall of the radiant waste boiler 120, and the annular micro-opening closing plate 129 can selectively close or open a channel between the second water-cooling wall 122 and the inner wall of the radiant waste boiler 120 to automatically balance the gas amount; the annular ajar closure plate 129 is connected to the inner wall of the radiant waste kettle 120 by springs. Wherein, the protective gas entering from the liquid surface protective gas inlet 128 is located below the closing-in of the second water-cooling wall 122, and the annular baffle 127 can slow down the upward channeling of moisture in the chilling chamber 130, so that the moisture in the chilling chamber 130 can be effectively prevented from channeling into the dead zone of the waste boiler, and the phenomenon of corrosion of the water-cooling wall near the dead zone side is caused. The annular ajar closing plate 129 in this embodiment is designed in multiple segments, each segment is covered by a plurality of stay cords (such as springs) with certain deformation amount fixed on the wall surface of the same body, and a certain gap is always reserved, firstly, the normal upward discharge of liquid level gas is ensured, secondly, ash in dead zone is discharged into the chilling chamber 130 by gravity flow in time, when abnormal pressure release occurs in the gasification furnace system, the deformation of the springs is prolonged due to the increase of pressure difference, the annular ajar closing plate 129 is fully opened, the dead zone gas is communicated with the main channel through the water bath of the chilling chamber 130, automatic balance is realized, and the safety and reliability of the water-cooled wall are ensured, so that the risk that the protective gas in the dead zone cannot be discharged in time through a balance hole when the extreme speed of the synthesis gas main channel system is abnormally released, and the pressure difference between the inside and outside the water-cooled wall on the outer side of the waste pan returning channel 124 is excessive, and the water-cooled wall is damaged is prevented.
To increase the heat exchange area, in order to prevent the solidified ash entrained in the partial synthesis gas from adhering to the foldback channel 124, a plurality of groups of heat exchange fins 1241 are arranged above 3000mm of a second group of temperature detection facilities (within 800 mm) of the foldback channel 124; the heat exchange fins 1241 are 8-16 groups, and each group of heat exchange fins 1241-6. The heat exchange fin 1241 can strengthen the heat exchange effect in the foldback channel 124, and heat exchange fin 1241 upper segment directly passes waste pan horizontal wall water-cooling wall, reduces the dust deposit risk, sets up the soot blowing mouth at second water-cooling wall 122 and horizontal wall water-cooling wall junction simultaneously and regularly sweeps, prevents the dust deposit, and secondly, also sets up the soot removing mouth in the exit of foldback channel 124, regularly sweeps. The heat exchange fins 1241 arranged in the foldback channel 124 have high recovery rate of sensible heat in recovered synthesis gas and large recovery heat, and meanwhile, the heat exchange pressure of the convection waste boiler 160 is relieved due to the fact that the outlet temperature is reduced due to the heat exchange fins 1241 arranged in the foldback channel 124; at 96000Nm above 3 Effective gas/H (CO+H) 2 ) For example, the temperature of the discharged convection waste boiler 160 is reduced to about 400 ℃, the volume and heat exchange area of the convection waste boiler 160 are greatly reduced, both the equipment investment and the equipment layout civil engineering investment are greatly reduced, the synthetic water content after the discharged dry ash removal system is up to 30%, the synthetic water content is close to the chilling flow, the synthetic water is fed into the downstream, the water-gas ratio of the downstream conversion device is ensured, the additional steam is not required, and the byproduct steam is at least 120 tons.
The quench chamber 130 communicates with the bottom of the radiant waste boiler 120, and the quench chamber 130 is used to cool slag entrained in the syngas.
The syngas within the return channel 124 of the radiant waste cooker 120 is directed out through the inclined upward jacket tube 140, the inclination of the inclined upward jacket tube 140 being less than 35 ℃ (at an angle to the vertical), and when in some embodiments, the cyclone separator 150 is absent, the inclined upward jacket tube 140 communicates directly with the convection waste cooker 160; when cyclone 150 is included, cyclone 150 is connected between cyclone 150 and cyclone 140, cyclone 150 is connected between cyclone 140 and convection waste cooker 160, the outlet of cyclone 150 is connected to convection waste cooker 160, and the outlet of cyclone 150 is connected to dry ash removal device 170.
Specifically, cyclone 150 includes separation chamber 151, taper pipe 152 and cone casing 153, separation chamber 151 adopts resistant firebrick, coil pipe or jacket structure, taper pipe 152 adopts nickel base alloy or take the nickel base alloy pipe of cooling half pipe, the bottom shrink of separation chamber 151 becomes the toper, the taper pipe 152 is connected to the below of separation chamber 151, cone casing 153 is connected to the shrink position department of separation chamber 151, taper pipe 152 is located cone casing 153, there is purge gas import 154 at the top of cone casing 153, the interior ring of cone casing 153 is provided with 3 way purge gas export, contained angle between every purge gas export is 120 ℃. The bottom of the cone housing 153 is provided with three temperature detecting elements 155 of different positions and heights, the air inlet pipeline of the purge gas inlet 154 is provided with a preheating purge protecting gas pipeline 156 and a cooling gas pipeline 157, and the cooling gas pipeline 157 is provided with a control valve group which is connected with the temperature detecting elements 155. Wherein, the purge gas discharged from the purge gas outlet continuously purges downwards, the purge gas discharged from the preheating purge protecting gas pipeline 156 comes from the protecting gas buffer tank 180, the synthetic gas is heated by the protecting gas preheater 181, the separated ash provides discharging power, and the separated ash is discharged into the fine ash collecting tank 171, and meanwhile, the high-temperature gas is restrained from entering the lower part of the cone hopper. The purge gas discharged from the cooling gas pipeline 157 comes from unheated synthetic gas of the protective gas buffer tank 180, and when the temperature of fine ash discharged is too high, the cooling gas is timely opened to purge and cool and ash discharged, so that the downstream high-pressure fine ash collecting tank 171 is prevented from being overtemperature.
The convection waste boiler 160 is a vertical cylindrical water-cooling wall and an inner core winding pipe group water-cooling wall, the synthetic gas hardly entrains slag, ash entrained by the synthetic gas enters the downstream dry ash removal device 170 along with the synthetic gas due to vertical arrangement, the risk of dust accumulation is small on the inner core winding pipe group water-cooling wall, the design heat exchange efficiency is relatively high, a soot blowing port and a vibration soot blowing facility are arranged on the cylindrical water-cooling wall and the inner core winding pipe group water-cooling wall of the convection waste boiler 160, ash on the water-cooling wall surface is regularly blown, the heat exchange effect of a water-cooling wall pipe is ensured, and meanwhile, the inner core winding pipe group water-cooling wall is ensured not to hold the dust accumulation.
The cyclone 150 communicates with the dry ash removal device 170 by means of a sloped down jacket pipe having a slope of less than 30 ℃ (at an angle to the vertical) and an outlet from the sloped down jacket pipe with the dry ash removal device 170.
The dry ash removal device 170 is used for removing fine ash in the synthesis gas, in this embodiment, the dry ash removal device 170 is in communication with an outlet of the convection waste boiler 160, and when the cyclone 150 is further included in this embodiment, the dry ash removal device 170 is also in communication with an outlet of the cyclone 150. The syngas exiting the top of cyclone 150 enters convection waste boiler 160 for further heat recovery and then enters dry ash removal unit 170.
Specifically, the dry ash removal device 170 includes an ash collection tank 171, an ash discharge tank 172, a discharge tank filter 173, an ash cooler 174, and an ash bin 175, wherein an ash filter 1711 is provided at the top of the ash collection tank 171, the ash filter 1711 communicates with the outlet of the cyclone 150 and the outlet of the convection waste boiler 160, the ash collection tank 171 communicates with the outlet of the ash filter 1711, the ash discharge tank 172 communicates with the outlet of the ash collection tank 171, the discharge tank filter 173 communicates with the top gas outlet of the ash discharge tank 172, the ash cooler 174 communicates with the bottom ash outlet of the ash discharge tank 172, and the ash bin 175 communicates with the ash cooler 174. The discharge tank is provided with a high-pressure air inlet for improving the pressure in the discharge tank, a high-pressure balance valve 176 is arranged between the ash collection tank 171 and the ash discharge tank 172, a pressure regulating valve 177 is arranged at the outlet of the discharge tank filter 173, and a low-pressure balance valve 178 is arranged between the ash discharge tank 172 and the ash cooler 174; the ash cooler 174 is provided with a water wall heat exchanger tube bank 1741 and a low pressure nitrogen inlet 1742; an ash cooling steam drum 179 is also arranged above the ash cooler 174, and an inlet and an outlet of the water-cooled wall heat exchange tube group 1741 are connected with the ash cooling steam drum 179.
The ash discharge flow of the dry ash removal device 170 is as follows: fine ash in the ash collection tank 171 is periodically discharged into the ash discharge tank 172 by a program, and the high-pressure CO is introduced into the ash discharge tank 172 by a high-pressure air inlet before discharging 2 Realizing the operation pressure of pressurizing the ash discharge tank 172 to the ash collection tank 171, then opening and balancing the two tanks of pressure by the ash collection tank 171 and a high-pressure balance valve 176 in the ash discharge tank 172, and opening a discharge valve group of the ash collection tank 171 after ensuring normal respiration and exhaust during discharging, and depending on weightAfter the fine ash is collected in the ash collection tank 171 and discharged to the ash discharge tank 172 by force flow, the discharge valve and the high-pressure balance valve 176 are closed, after the ash collection tank 171 and the ash discharge tank 172 are thoroughly isolated, the pressure regulating valve 177 at the outlet of the discharge tank filter 173 is opened, the pressure of the ash discharge tank 172 is discharged to micro positive pressure, the low-pressure balance valve 178 in the ash discharge tank 172 and the ash cooler 174 is opened and balanced to ensure normal respiration and exhaust during discharging, the discharge valve group of the ash discharge tank 172 is opened, after the fine ash in the ash discharge tank 172 is discharged to the ash cooler 174 by gravity flow, the discharge valve group and the low-pressure balance valve 178 are closed, after the ash discharge tank 172 and the ash cooler 174 are thoroughly isolated, the low-pressure balance valve 178 at the outlet of the discharge tank filter 173 is closed, and the pressure-boosting gas CO of the ash discharge tank 172 is opened 2 The operation pressure of the ash discharge tank 172 is boosted to the operation pressure of the ash collection tank 171 again, then the high-pressure balance valve 176 in the ash collection tank 171 and the ash discharge tank 172 is opened to balance the two tanks, and after normal respiration and exhaust during discharging are ensured, the discharge valve group of the ash collection tank 171 is opened to enter a normal ash collection stage, and after ash collection is completed, the process is circulated to the next step, and the steps are the same as the above.
The shielding gas buffer tank 180 is used for providing soot blowing gas, quenching gas and purge gas for the downstream full waste boiler entrained flow dry method soot removal gasifier 100 for treating salt-containing waste water, and in this embodiment, all places where the soot blowing gas, the quenching gas and the purge gas are provided need to be communicated with the shielding gas buffer tank 180. The device has the advantages of high safety and stability in online operation, long periodicity, good economical efficiency and the like.
The shielding gas preheater 181 is used for heating soot blowing gas and purge gas to be heated, so that the excessive temperature difference between the soot blowing gas or the purge gas and the device during purging is avoided, and in the embodiment, the shielding gas used by the combustion chamber 110 radiation waste boiler 120 and the convection waste boiler 160 is heated by the shielding gas preheater 181.
The synthesis gas washing tower 190 is used for washing the ash-removed synthesis gas, a middle feeding hole of the synthesis gas washing tower 190 is communicated with a top air outlet of the dry ash removal device 170, a top air outlet of the synthesis gas washing tower 190 is communicated with the protective gas compressor 182, and the protective gas compressor 182 is communicated with the protective gas buffer tank 180.
The working principle of the downstream full waste boiler entrained flow dry ash removal gasification furnace 100 for treating salt-containing waste water provided by the embodiment is as follows:
the dry coal dust or the water coal slurry enters the combustion chamber 110 for combustion, the generated synthesis gas and slag enter the central channel 123 of the radiation waste boiler 120 through the slag outlet 111, as the slag outlet 111 is provided with the salt-containing waste water ring 112 and the slag guide pipe 113, the salt-containing waste water flows downwards along the slag guide pipe 113 through the salt-containing waste water ring 112, the salt-containing waste water, the high-temperature slag and the synthesis gas are subjected to heat transfer in the parallel downwards flowing process, so that the water in the salt-containing waste water is gasified into steam, the water-gas ratio of the synthesis gas in the radiation waste boiler 120 is increased, the dissolved matters such as salt-containing silicon are separated out, most of the separated matters and fine ash are discharged in a solid form along with the entering of the synthesis gas into the dry ash removal system, the problem that the salt-containing waste water is excessively added from the side surface or the direction of the local synthesis gas and slag is changed is solved, the waste boiler slag is finally caused, meanwhile, the problem of salt-containing waste water treatment is solved, the temperature of the synthesis gas and the synthesis gas is reduced after the salt-containing waste water is uniformly added into the slag guide pipe 113, the whole temperature is reduced from the temperature of 1450 ℃ to the temperature to below the normal slag, the slag melting point is greatly reduced, the risk of slag bonding is greatly reduced, and the slag bonding risk is caused. After the synthetic gas is cooled by the first water-cooling wall 121, the synthetic gas enters the foldback channel 124 from the bottom of the first water-cooling wall 121 and moves upwards to further recover sensible heat, and an annular baffle 127, a liquid level protection gas inlet 128 and an annular ajustment closing plate 129 which are arranged in the foldback channel 124 can effectively prevent moisture in the chilling chamber 130 from channeling into a dead zone of a waste boiler to cause corrosion phenomenon of the water-cooling wall near the dead zone, and when the gasification furnace system is subjected to abnormal pressure relief, the annular ajustment closing plate 129 can realize automatic balance to ensure the safety and reliability of the water-cooling wall, so that the risk that the pressure difference between the inside and the outside of the water-cooling wall at the outer side of the foldback channel 124 of the waste boiler is overlarge and the water-cooling wall is damaged is prevented when the rapid abnormal pressure relief of the main channel system of the synthetic gas is prevented. In addition, in order to ensure the heat exchange effect of the foldback channel 124, heat exchange fins 1241 are arranged in the foldback channel 124, so that the heat exchange effect is improved, the synthetic gas is discharged out of the foldback channel 124 and then sequentially connected with a cyclone 150 (the cyclone 150 can be omitted due to the fact that the ash content is low according to the characteristics of the coal selected by the project), a convection waste boiler 160, a dry ash removing device 170 and a synthetic gas washing tower 190 are discharged after being washed, and coarse slag is discharged through a slag discharging system after being chilled and cooled in a water bath of the chilling chamber 130.
In summary, the embodiment of the invention provides a down full waste pan entrained flow dry ash removal gasification furnace 100 for treating salt-containing waste water, which is characterized in that a salt-containing waste water ring 112 and a slag guide pipe 113 are arranged at a slag outlet 111, so that the salt-containing waste water can be used for cooling synthetic gas and slag entering a radiation waste pan 120, the overall temperature is reduced from about 1450 ℃ to 950-1150 ℃ and is lower than a common ash melting point, ash is solidified, and the risks of slag receiving and slag sticking of the waste pan are greatly reduced; meanwhile, the wastewater discharged from the salt-containing wastewater ring 112 uniformly flows downwards along the inner wall of the slag guide pipe 113, and heat is transferred in the process of parallel downward flow of the salt-containing wastewater, high-temperature slag and synthetic gas, so that water in the salt-containing wastewater is gasified into steam, namely, the water-gas ratio of the synthetic gas in the wastewater pot is increased, the water-gas ratio of a downstream conversion device is ensured, and the salt-containing silicon and other dissolved matters are separated out, most of the separated matters and fine ash are discharged in a solid form along with the synthetic gas in a dry ash removal system, the problem of disposal of the salt-containing wastewater is thoroughly solved, the temperature of the synthetic gas at the inlet of the wastewater pot is reduced to be within 1000 ℃ after the salt-containing wastewater is added, the heat exchange pressure of the radiation wastewater pot 120 is greatly reduced, and the fin water cooling wall arranged in the central channel 123 of the traditional radiation wastewater pot 120 is eliminated, so that the radiation wastewater pot 120 has a simple structure, the hidden trouble of slag is avoided, and the problems of slag and slag bonding in the wastewater pot are thoroughly solved from the root. The downlink full waste pan entrained flow dry ash removal gasification furnace 100 for treating salt-containing wastewater can thoroughly solve the problem of salt-containing wastewater treatment, the sensible heat of synthesis gas at high temperature is recovered as much as possible, the waste pan channel of the gasification furnace has the advantages of simple structure, large central channel 123, slag formation and small slag bonding risk, and meanwhile, the technology has the remarkable advantages of safe and reliable operation, high online operation rate, convenient operation and maintenance, low operation economic cost, low comprehensive energy consumption and the like, and greatly improves the economic value.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a handle full waste pan entrained flow bed dry process ash removal gasifier of going of salt wastewater which characterized in that, it includes combustion chamber, radiation waste pan, quench chamber, slope upward double-layered pipe, convection current waste pan and dry process ash removal device, the combustion chamber structure is water-cooled wall or stove brick, the bottom of combustion chamber is provided with the slag notch, the slag notch with radiation waste pan intercommunication, the bottom of radiation waste pan with quench chamber intercommunication; the gas phase outlet of the radiant waste boiler is communicated with the convection waste boiler through the inclined upward jacket pipe, and the outlet of the convection waste boiler is communicated with the dry ash removal device;
the slag notch department is provided with and contains salt waste water ring and sediment stand pipe, contain salt waste water ring and be provided with many branch road that are used for providing containing salt waste water, contain the bottom of salt waste water ring and be provided with vertical decurrent delivery port, contain the outer lane of salt waste water ring with the sediment stand pipe is connected.
2. The dry ash removal gasifier of the downstream total waste boiler entrained flow bed for treating salt-containing waste water according to claim 1, wherein a first water-cooling wall and a second water-cooling wall are arranged in the radiant waste boiler, the second water-cooling wall is positioned on the outer side of the first water-cooling wall, the first water-cooling wall encloses a central channel, the central channel is communicated with the slag hole, a foldback channel is formed between the first water-cooling wall and the second water-cooling wall, and the inclined upward jacket pipe is communicated with the top of the foldback channel;
preferably, the first water-cooling wall and the second water-cooling wall are both provided with rappers for ash removal;
preferably, a chilling gas inlet for abnormal overtemperature protection is arranged at the inlet of the foldback channel;
preferably, the top of the foldback channel is provided with a soot blowing gas inlet.
3. The dry ash removal gasifier of the downstream total waste boiler entrained-flow bed for treating salt-containing wastewater according to claim 2, wherein the length of the second water-cooled wall is greater than that of the first water-cooled wall, the lower end of the second water-cooled wall is inwardly closed to form a cone shape, an annular baffle plate and a liquid level protection gas inlet are arranged at the position, corresponding to the closing position of the second water-cooled wall, of the inner wall of the radiant waste boiler, an annular micro-opening closing plate is arranged above the closing position of the second water-cooled wall, the annular micro-opening closing plate is positioned between the second water-cooled wall and the inner wall of the radiant waste boiler, and the annular micro-opening closing plate can selectively close or open a channel between the second water-cooled wall and the inner wall of the radiant waste boiler to automatically balance gas amount;
preferably, the annular ajar closing plate is connected with the inner wall of the radiation waste pot through a spring.
4. The dry ash removal gasifier of the downstream total waste boiler entrained flow bed for treating salt-containing waste water according to claim 2, wherein a plurality of groups of heat exchange fins are arranged in the foldback channel;
preferably, the number of the heat exchange fins is 8-16, and each group of the heat exchange fins is 4-6.
5. The down stream all-waste pan entrained flow dry ash removal gasifier for treating brine waste as set forth in claim 1, further comprising a cyclone separator connected between said inclined upward jacket tube and said convection waste pan, an air outlet of said cyclone separator being connected to said convection waste pan, an ash outlet of said cyclone separator being connected to said dry ash removal device.
6. The dry ash removal gasifier of a downstream total waste boiler entrained flow bed for treating salt-containing wastewater according to claim 5, wherein the cyclone separator comprises a separation chamber, a cone pipe and a cone shell, the bottom of the separation chamber is contracted into a cone shape, the cone pipe is connected to the lower part of the separation chamber, the cone shell is connected to the contracted position of the separation chamber, the cone pipe is positioned in the cone shell, the top of the cone shell is provided with a purge gas inlet, the bottom of the cone shell is provided with three temperature detection elements with different positions, the air inlet line of the purge gas inlet is provided with a preheating purge protection gas line and a cooling gas line, and the cooling gas line is provided with a control valve group connected with the temperature detection elements.
7. The dry ash removal gasifier of a downstream full-waste entrained-flow bed for treating brine waste according to claim 6, wherein the dry ash removal device comprises an ash collection tank, an ash discharge tank, a discharge tank filter, an ash cooler and an ash bin, wherein an ash filter is arranged at the top of the ash collection tank, the ash filter is communicated with the outlet of the cyclone separator and the outlet of the convection waste, the ash collection tank is communicated with the outlet of the ash filter, the ash discharge tank is communicated with the outlet of the ash collection tank, the discharge tank filter is communicated with the top gas outlet of the ash discharge tank, the ash cooler is communicated with the bottom ash outlet of the ash discharge tank, and the ash bin is communicated with the ash cooler;
preferably, the discharge tank is provided with a high-pressure air inlet for improving the pressure in the discharge tank, a high-pressure balance valve is arranged between the ash collecting tank and the ash discharge tank, a pressure regulating valve is arranged at the outlet of the discharge tank filter, and a low-pressure balance valve is arranged between the ash discharge tank and the ash cooler;
preferably, the ash cooler is provided with a water-cooled wall heat exchange tube group and a low-pressure nitrogen inlet;
preferably, an ash cooling steam drum is further arranged above the ash cooler, and an inlet and an outlet of the water-cooled wall heat exchange tube group are connected with the ash cooling steam drum.
8. The downstream all-waste-pot entrained-flow dry-method ash-removal gasifier for treating salt-containing wastewater according to claim 1, further comprising a guard gas buffer tank for providing soot blowing gas, quenching gas and purge gas.
9. The dry ash removal gasifier of the downstream total waste pan entrained flow bed for treating salt-containing wastewater according to claim 8, wherein the shielding gas buffer tank is further provided with a shielding gas preheater for heating gas, and shielding gas used for the combustion chamber, the radiant waste pan and the convection waste pan is heated by the shielding gas preheater.
10. The downstream all-waste-pot entrained-flow dry-method ash-removal gasifier for treating salt-containing wastewater of claim 8, further comprising a synthesis gas scrubber, wherein a middle feed inlet of the synthesis gas scrubber is communicated with a top air outlet of the dry-method ash-removal device, wherein a top air outlet of the synthesis gas scrubber is communicated with a shielding gas compressor, and wherein the shielding gas compressor is communicated with the shielding gas buffer tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311517185.9A CN117327511A (en) | 2023-11-14 | 2023-11-14 | Down-flow full waste boiler entrained flow dry ash removal gasification furnace for treating salt-containing wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311517185.9A CN117327511A (en) | 2023-11-14 | 2023-11-14 | Down-flow full waste boiler entrained flow dry ash removal gasification furnace for treating salt-containing wastewater |
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| CN117327511A true CN117327511A (en) | 2024-01-02 |
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|---|---|---|---|
| CN202311517185.9A Pending CN117327511A (en) | 2023-11-14 | 2023-11-14 | Down-flow full waste boiler entrained flow dry ash removal gasification furnace for treating salt-containing wastewater |
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| Country | Link |
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| CN (1) | CN117327511A (en) |
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2023
- 2023-11-14 CN CN202311517185.9A patent/CN117327511A/en active Pending
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