CN205653290U - A device for separating broken coal pressure gasification producer gas water - Google Patents
A device for separating broken coal pressure gasification producer gas water Download PDFInfo
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- CN205653290U CN205653290U CN201620317805.3U CN201620317805U CN205653290U CN 205653290 U CN205653290 U CN 205653290U CN 201620317805 U CN201620317805 U CN 201620317805U CN 205653290 U CN205653290 U CN 205653290U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 257
- 239000003245 coal Substances 0.000 title claims abstract description 25
- 238000002309 gasification Methods 0.000 title abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 73
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 57
- 238000000926 separation method Methods 0.000 claims abstract description 51
- 239000003034 coal gas Substances 0.000 claims abstract description 26
- 239000000428 dust Substances 0.000 claims abstract description 26
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 239000010865 sewage Substances 0.000 claims description 38
- 230000000241 respiratory effect Effects 0.000 claims description 27
- 239000002002 slurry Substances 0.000 claims description 11
- 230000009977 dual effect Effects 0.000 claims description 10
- 230000006837 decompression Effects 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims 1
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- 230000007096 poisonous effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 249
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 15
- 230000005484 gravity Effects 0.000 description 11
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 239000000571 coke Substances 0.000 description 6
- 238000011010 flushing procedure Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
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- 238000002485 combustion reaction Methods 0.000 description 3
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- 239000000047 product Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- XABJJJZIQNZSIM-UHFFFAOYSA-N azane;phenol Chemical compound [NH4+].[O-]C1=CC=CC=C1 XABJJJZIQNZSIM-UHFFFAOYSA-N 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
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- 239000003077 lignite Substances 0.000 description 2
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- 238000001179 sorption measurement Methods 0.000 description 2
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- 229910052717 sulfur Inorganic materials 0.000 description 2
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- 230000002588 toxic effect Effects 0.000 description 2
- 210000003437 trachea Anatomy 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
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- 125000004122 cyclic group Chemical group 0.000 description 1
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Abstract
The utility model provides a device for separating broken coal pressure gasification producer gas water, the device includes: dust -laden gas liquor inflation ware, oiliness gas liquor inflation ware, tar bilge pit, first tar separator, oil separator, final oil separator, two filter medium filtration ware and coal gas water storage tank. The device still includes the water seal of dust -laden gas liquor inflation ware safety, the water seal of oiliness gas liquor inflation ware safety, the water seal of tar bilge pit safety, breathing gas safety water seal and the safe water seal vapour and liquid separator who is connected with them to and be used for torch gas -liquid separation jar, torch water sealed tank and the first torch handling and burn and discharge inflation gas, and be used for breathing the second torch that gas burns and discharges. The utility model discloses can change poisonous and harmful's in expand gas and the breathing gas compositions such as CO, H2S and CH4 compositions such as into CO2, H2O and a small amount of SO2, and then discharge, can alleviate the pollution degree to the environment greatly.
Description
Technical Field
The utility model relates to a device for separating crushed coal pressure gasification furnace gas water and in particular relates to a device for separating 4.0MPa crushed coal pressure gasification furnace gas water.
Background
The 3.0MPa crushed coal pressure gasification process commonly adopted in China belongs to the MARK-IV type gasification process of the third generation of Lurgi company, and the product crude gas is mainly used for synthesizing ammonia, urban gas and raw gas for preparing oil from coal. The process is characterized in that: the coal gas has low heat value, low steam decomposition rate, low gasification efficiency, high yield of coal gas water, complex dissolved gas components in the coal gas water, high yield of solid particles, oil and tar, and difficult oil separation and removal of the coal gas water, and influences the long-term stable operation of production; and the expanded gas and the breathing gas (part of dissolved gas obtained from gas water) have large smell when being emptied on site, thereby influencing the safety and environmental protection of the site environment and the personal health of operators.
The domestic first 4.0MPa crushed coal pressure gasification process is basically the same as the MARK-IV type gasification process of the third generation of Lurgi company, belongs to the gasification process of a moving bed, but mainly has the following difference: the gasification pressure is increased on the basis of the crushed coal pressurized gasification process of 3.0MPa, so that the heat value of coal gas, the steam decomposition rate, the gasification efficiency and the methane content are increased. However, the gasification raw material coal of the 4.0MPa crushed coal pressure gasification process is generally brown coal, for example, brown coal from the great area of cylinder, and the water content thereof may reach 23% to 42% and the volatile matter thereof is 26% to 40%. Compared with the 3.0MPa crushed coal pressure gasification process, the 4.0MPa crushed coal pressure gasification process has the advantages of higher yield of coal gas water, higher dissolved gas amount in the coal gas water, more complex components, higher yield of solid particles, oil and tar, more difficulty in oil separation and removal of the coal gas water, and difficulty in long-term stable operation of the device. In particular, the discharge of inflation gas and respiratory gas has a greater adverse effect on the safety and environmental protection of the site environment and the personal health of operators.
SUMMERY OF THE UTILITY MODEL
Therefore, an object of the present invention is to provide an apparatus for separating coal gas water of a crushed coal gasifier, and more particularly, to an apparatus suitable for separating coal gas water of a 4.0MPa crushed coal gasifier, which can effectively treat expansion gas and respiratory gas generated during the separation of the coal gas water.
The purpose of the utility model is realized through the following technical scheme.
The utility model provides a device for separating crushed coal pressure gasification stove gas water, the device includes:
a dust-containing gas water expander,
an oil-containing gas water expander is arranged on the oil-containing gas water expander,
a tar sewage tank,
a primary tar separator for separating the coal gas water from the dust-containing coal gas water expander and the coal gas water from the tar sewage tank,
an oil separator for separating gas water from the oil-containing gas water expander,
a final oil separator for separating the gas water after the decompression and oil separation from the primary tar separator and the gas water after the decompression and oil separation from the oil separator,
a dual media filter for filtering gas water from the final oil separator, and
a gas water storage tank for storing filtered gas water from the dual-medium filter,
wherein,
the device also comprises a safe water seal of the dusty gas water expander, a safe water seal of the oily gas water expander and a safe water seal gas-liquid separator connected with the safe water seal and the safe water seal, wherein the dusty gas water expander is connected with the safe water seal of the dusty gas water expander through an expansion gas pipeline branch, the oily gas water expander is connected with the safe water seal of the oily gas water expander through an expansion gas pipeline branch,
The device also comprises a torch gas-liquid separation tank, a torch water seal tank, a first torch, an expansion gas cooler and an expansion gas-liquid separator for separating expansion gas from the expansion gas cooler; wherein the dusty gas water expander and the oily gas water expander are connected with the expansion gas cooler through an expansion gas pipeline main path, the expansion gas cooler is connected with the expansion gas-liquid separator through a pipeline, the expansion gas-liquid separator is connected with the flare gas-liquid separation tank through a pipeline, the flare gas-liquid separation tank is connected with the flare water seal tank through a pipeline, and the flare water seal tank is connected with a first flare through a pipeline, and
the device still includes tar sewage groove safety water seal, breathe gas safety water seal and second torch, wherein, the tar sewage groove is connected with tar sewage groove safety water seal via breathing gas pipeline branch road, just tar separator, oil separator, final oil separator and gas water storage tank are connected with breathing gas safety water seal via breathing gas pipeline branch road, tar sewage groove safety water seal and breathing gas safety water seal are connected with safety water seal vapour and liquid separator via the pipeline, just tar separator, oil separator, final oil separator, gas water storage tank and tar sewage groove are connected with the second torch via breathing gas pipeline.
The utility model discloses in, at first according to decompression flash distillation principle, utilize the principle that the solubility of gas in liquid reduces along with pressure reduction, separate out dissolved CO, CO in the coal gas aquatic in dusty coal gas water expander and oiliness coal gas water expander2、H2、H2S、CH4、H2O (gas), and the like.
Secondly, according to the principle of non-pressure gravity settling, the density difference of different components is utilized to separate oil, tar and dust-containing tar in the gas water in an initial tar separator, an oil separator and a final oil separator.
Thirdly, according to the filtering and adsorbing principle, substances such as suspended solids, oil, tar and the like in the gas water after passing through the final oil separator are further treated in a double-medium filter by utilizing the coke adsorption characteristic, and impurities are removed.
Finally, the dissolved gas (the main components are CO and CO) in the gas water2、H2、H2S、CH4、H2O (gas) and other gases) are divided into expansion gas and breathing gas according to the pressure grade, and the expansion gas and the breathing gas are respectively collected and then are respectively sent to a first torch and a second torch. The expansion gas and the breathing gas are combusted and discharged, and toxic and harmful CO and H in the expansion gas and the breathing gas can be discharged2S and CH4Isocomponent conversion to CO2、H2O and a small amount of SO2And the components are mixed and then discharged, so that the pollution degree to the environment can be greatly reduced. The solid particles are sold off-site.
In addition, in the object of the present invention, it is also possible to feed the expanding gas to a Claus process sulfur recovery unit.
According to the utility model provides a device, wherein, the device is still including the tar groove that is used for storing the tar that comes from the first tar separator and the oil groove that is used for storing the oil that comes from final oil separator, and the tar groove is connected with breathing gas safety water seal and second torch respectively via breathing the trachea line to and the oil groove is connected with breathing gas safety water seal and second torch respectively via breathing the trachea line. In some embodiments, the oil sump may also be coupled to the primary tar separator and the oil separator to store oil from the primary tar separator and the oil separator.
According to the utility model provides a device, wherein, bottom and the tar bilge pit of dirty gas water expander safety water seal, oily gas water expander safety water seal, tar bilge pit safety water seal, breathe gas safety water seal and safety water seal vapour and liquid separator are connected.
According to the utility model provides a device, wherein, first tar separator, oil separator, final oil separator, gas water storage tank, tar sewage groove, tar groove and oil groove are connected with torch gas-liquid separation jar through breathing gas pipeline and valve.
According to the utility model provides a device, wherein, the device is still including inflation air-blower, inflation gas bypass cooler and inflation air-blower vapour and liquid separator, and inflation gas vapour and liquid separator's gas outlet is connected with inflation gas bypass cooler via the inflation air-blower, and inflation gas bypass cooler is connected with inflation air-blower vapour and liquid separator via the pipeline, and inflation air-blower vapour and liquid separator is connected with torch gas-liquid separation jar via the pipeline.
According to the utility model provides a device, wherein, the device is still including setting up the torch condensate pump in first torch bottom. In some embodiments, the flare condensate pump may recycle a portion of the condensate at the bottom of the first flare into the first flare, and in some embodiments, the flare condensate pump may send a portion of the condensate at the bottom of the first flare out of the battery limit zone.
According to the utility model provides a device, wherein, the device still includes first dashpot and second dashpot, wherein, the first tar separator and the oil separator are connected with first dashpot, final oil separator, second dashpot and two medium filter connect gradually, first dashpot is connected with breathing gas safety water seal and second torch respectively via breathing gas pipeline, and the second dashpot is connected with breathing gas safety water seal and second torch respectively via breathing gas pipeline; and the first buffer tank and the second buffer tank are connected with the gas-liquid separation tank via a breathing gas line and a valve.
According to the utility model provides a device, wherein, the device still includes the mud cistern that is used for storing the mud that comes from two medium filter and gas water storage tank, wherein the mud cistern is connected with breathing gas safety water seal and second torch respectively through breathing gas pipeline; and the slurry tank can be connected with the gas-liquid separation tank through a breathing gas pipeline and a valve.
According to the utility model provides a device, wherein, the device is still including the washtrough that is used for washing two medium filter gas water, and wherein the washtrough is connected with breathing gas safety water seal and second torch respectively via breathing gas pipeline to the washtrough can be connected with the gas-liquid separation jar via breathing gas pipeline and valve.
The device provided by the utility model can be used for treating toxic and harmful CO and H in the inflation gas and the respiratory gas2S and CH4Isocomponent conversion to CO2、H2O and a small amount of SO2And the components are mixed and then discharged, so that the pollution degree to the environment can be greatly reduced, and the safety and the environmental protection of the field environment and the personal health of operators can be improved.
Drawings
Embodiments of the present invention are described in detail below with reference to the attached drawing figures, wherein:
fig. 1 is a schematic view of an apparatus according to an embodiment of the present invention;
Fig. 2 is a schematic view of an apparatus according to another embodiment of the present invention;
fig. 3 is a schematic view of an apparatus according to yet another embodiment of the present invention;
fig. 4 is a schematic view of an apparatus according to yet another embodiment of the present invention; and
fig. 5 is a schematic view of an apparatus according to an embodiment of the present invention.
Repeat use of reference characters in the present specification and drawings is intended to represent same or analogous features or elements of the invention.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, which are given for the purpose of illustration only and are not intended to limit the scope of the invention.
Example 1
Fig. 1 shows an apparatus for separating crushed coal pressurized gasifier gas water, the apparatus comprising:
a dust-containing gas water expander 4, a dust-containing gas water expander,
an oil-containing gas water expander 6, a gas water expander,
a tar sewage tank 27 is provided in the sewage tank,
a primary tar separator 5 for separating the gas water from the dust-containing gas water expander 4 and the gas water from the tar sewage tank 27,
an oil separator 7 for separating gas water from the oil-containing gas water expander 6,
a final oil separator 11 for separating the gas water after the decompression and oil separation from the primary tar separator 5 and the gas water after the decompression and oil separation from the oil separator 7,
A dual medium filter 14 for filtering the gas water from the final oil separator 11, and
a gas water storage tank 15 for storing the filtered gas water from the dual media filter 14.
As shown in fig. 1, the device further comprises a safety water seal 22 of the dusty gas water expander, a safety water seal 23 of the oily gas water expander and a safety water seal gas-liquid separator 26 connected with the safety water seal 22 and the oily gas water expander, wherein the dusty gas water expander 4 is connected with the safety water seal 22 of the dusty gas water expander through an expansion gas pipeline branch, and the oily gas water expander 6 is connected with the safety water seal 23 of the oily gas water expander through an expansion gas pipeline branch.
The device further comprises a flare gas-liquid separation tank 34, a flare water-sealed tank 35, a first flare 36, an expansion gas cooler 38 and an expansion gas-liquid separator 39 for separating expansion gas from the expansion gas cooler 38, wherein the dusty gas-water expander 4 and the oil-containing gas-water expander 6 are connected with the expansion gas cooler 38 via a main expansion gas pipeline, the expansion gas cooler 38 is connected with the expansion gas-liquid separator 39 via a pipeline, the expansion gas-liquid separator 39 is connected with the flare gas-liquid separation tank 34 via a pipeline, the flare gas-liquid separation tank 34 is connected with the flare water-sealed tank 35 via a pipeline, and the flare water-sealed tank 35 is connected with the first flare 36 via a pipeline.
The device also comprises a tar sewage tank safety water seal 24, a breathing gas safety water seal 25 and a second torch 33; wherein, the tar sewage tank 27 is connected with the tar sewage tank safety water seal 24 through a respiratory gas pipeline branch, the primary tar separator 5, the oil separator 7, the final oil separator 11 and the gas water storage tank 15 are connected with the respiratory gas safety water seal 25 through a respiratory gas pipeline, the tar sewage tank safety water seal 24 and the respiratory gas safety water seal 25 are connected with the safety water seal gas-liquid separator 26 through pipelines, and the primary tar separator 5, the oil separator 7, the final oil separator 11, the gas water storage tank 15 and the tar sewage tank 27 are connected with the second torch 33 through a respiratory gas pipeline.
In addition, in this embodiment, the bottoms of the dust-containing gas water expander safety water seal 22, the oil-containing gas water expander safety water seal 23, the tar sewage tank safety water seal 24, the breathing gas safety water seal 25 and the safety water seal gas-liquid separator 26 may be further connected to a tar sewage tank 27.
Example 2
Figure 2 shows a preferred embodiment of the device of the invention. In this embodiment, on the basis of example 1, the apparatus further comprises a tar tank 29 for storing tar from the preliminary tar separator 5 and an oil tank 30 for storing oil from the final oil separator 11, the tar tank 29 being connected to the breathing gas safety water seal 25 and the second flare 33 via breathing gas lines, respectively, and the oil tank 30 being connected to the breathing gas safety water seal 25 and the second flare 33 via breathing gas lines, respectively.
Example 3
Figure 3 shows a preferred embodiment of the device of the invention. In this embodiment, on the basis of example 2, the apparatus further comprises an expansion gas blower 40 and an expansion gas bypass cooler 41, the gas outlet of the expansion gas-liquid separator 39 is connected to the expansion gas bypass cooler 41 via the expansion gas blower 40, the expansion gas bypass cooler 41 is connected to the flare gas-liquid separation tank 34 via a pipeline, the flare gas-liquid separation tank 34 is connected to the flare water-sealed tank 35 via a pipeline, and the flare water-sealed tank 35 is connected to the first flare 36 via a pipeline.
In this embodiment, the initial tar separator 5, the oil separator 7, the final oil separator 11, the gas water storage tank 15, the tar sewage tank 27, the tar tank 29, and the oil tank 30 may be further connected to a flare gas-liquid separation tank 34 via a breathing gas line and a valve.
In addition, the apparatus includes a flare condensate pump 32 disposed at the bottom of a second flare 33.
Example 4
Figure 4 shows a preferred embodiment of the device of the invention. In this embodiment, on the basis of example 2, the apparatus further comprises an expansion gas blower 40, an expansion gas bypass cooler 41, and an expansion gas blower gas-liquid separator 42, the gas outlet of the expansion gas-liquid separator 39 is connected with the expansion gas bypass cooler 41 via the expansion gas blower 40, the expansion gas bypass cooler 41 is connected with the expansion gas blower gas-liquid separator 42 via a pipeline, the expansion gas blower gas-liquid separator 42 is connected with the flare gas-liquid separation tank 34 via a pipeline, the flare gas-liquid separation tank 34 is connected with the flare water-sealed tank 35 via a pipeline, and the flare water-sealed tank 35 is connected with the first flare 36 via a pipeline.
In this embodiment, the initial tar separator 5, the oil separator 7, the final oil separator 11, the gas water storage tank 15, the tar sewage tank 27, the tar tank 29, and the oil tank 30 may be further connected to a flare gas-liquid separation tank 34 via a breathing gas line and a valve.
In addition, the apparatus includes a flare condensate pump 32 disposed at the bottom of a second flare 33.
Example 5
Fig. 5 shows a particularly preferred embodiment of the device of the invention.
1. Flash evaporation and primary separation of dust-containing gas water
2.1-3.5 MPa high-pressure dust-containing gas water with the temperature of 150-250 ℃ generated by a 4.0MPa crushed coal pressurized gasification furnace is cooled to 70 ℃ through a waste heat recoverer 1 (a part of low-pressure saturated steam is byproduct), a gas water injection heat exchanger 2 and a dust-containing gas water cooler 3, then enters a dust-containing gas water expander 4 to be expanded and decompressed to 120KPa, and gas dissolved in the gas water is flash-evaporated and separated to form expanded gas; the decompressed coal gas water enters a primary tar separator 5 for gravity settling separation; the gas water in the tar and sewage tank 27 and the slurry tank 20 is sent to the primary tar separator 5 via a tar and sewage transfer pump 28 and a slurry transfer pump 21, respectively. Wherein the primary tar separator 5 is arranged to separate tar and dust and a part of the oil from the gas water.
If the tar/oil is emulsified in the gas water, the oil-containing gas water (rich in ammonia) from the low temperature methanol wash can be used as a demulsifier to be introduced into the primary tar separator 5. The temperature of the primary tar separator 5 is controlled between 65 ℃ and 90 ℃, and in the lower part of the primary tar separator 5, tar with lower density is separated out in a first settling zone by buoyancy and flows into a tar tank 29 under the action of gravity through an external adjustable overflow pipe; gas water from the first settling zone (not shown) enters the second settling zone (not shown) through an annular gap (not shown) around the primary tar separator 5 to separate oil, which flows by gravity through an overflow pipe into the oil sump 30 (not shown); the dust-containing tar in the second settling zone is discharged to the bottom of the primary tar separator 5 through pipes (not shown) around the conical plate, and the dust-containing tar is separated from the bottom of the primary tar separator 5 and directly loaded on site. The gas water after oil separation flows into a first buffer tank 8 through an annular groove (not shown) fixed in the primary tar separator 5 under the action of gravity, is pressurized by a gas water delivery pump 12, is cooled by a gas water cooler 10, and then flows into a final oil separator 11; meanwhile, the gas water after oil separation can also directly flow into the final oil separator 11 through an annular groove (not shown) fixed in the primary tar separator 5 under the action of gravity. Operating both modes simultaneously can adjust the final oil separator 11 operating temperature, thereby ensuring that the final oil separator 11 operates between 70 ℃ (uncooled) and 40 ℃ (fully cooled).
2. Flash evaporation and primary separation of oil-containing gas water
Oil-containing gas water with the pressure of 2.1-3.5 MPa and the temperature of 0-100 ℃ from a crude gas cooling section of a 4.0MPa crushed coal pressurized gasification furnace and oil-containing gas water with the pressure of 2.1-3.5 MPa and the temperature of 0-8 ℃ from a low-temperature methanol washing device enter an oil-containing gas water expander 6, expansion and pressure reduction are carried out to 120KPa, and gas dissolved in the gas water is subjected to flash evaporation and separation to form expansion gas; the decompressed gas water flows into the oil separator 7 under the action of gravity, the temperature of the oil separator 7 is controlled between 65 ℃ and 80 ℃, oil and a small amount of tar are separated by the oil separator 7, the oil is separated from the gas water in the oil separator 7 by buoyancy, and then the oil returns to the center of the oil separator 7 along the radial direction through an oil lifter (not shown) fixed in the oil separator 7, and then the oil is collected into the oil tank 30 by gravity through an overflow pipe (not shown) fixed in the oil separator 7. The gas water after the pressure reduction and oil separation flows into an annular groove (not shown) fixed inside, and flows into the final oil separator 11 or the first buffer tank 8 by gravity.
If the gas water flows into the first buffer tank 8, the gas water is pressurized by the gas water transfer pump 12 and then flows into the final oil separator 11 after being cooled by the gas water cooler 10, so as to adjust the operating temperature of the final oil separator 11, thereby ensuring that the final oil separator 11 operates between 70 ℃ (uncooled) and 40 ℃ (fully cooled).
3. Final separation of gas water
The gas water after the pressure reduction and oil separation from the primary tar separator 5 and the oil separator 7 enters the bottom of the final oil separator 11, and is further subjected to oil-water separation after being filtered by a coke filter frame and a TPI module (the TPI module is an inclined plate type intermediate collector) (not shown) fixed inside the final oil separator 11. The oil leaves the coke filter frame and collects in an oil collection chamber (not shown) fixed inside the final oil separator 11, and is fed by gravity into the sump 30. The separated gas water leaves the bottom of the TPI module of the final oil separator 11 and then flows up to an internal stationary water collection chamber (not shown) and through an overflow weir by gravity into the second surge tank 9, pressurized by a filter feed pump 13 and sent to a dual media filter 14 for filtration.
A balance pipeline is connected between the first buffer tank 8 and the second buffer tank 9, and a coal gas injection water pump 37 connected to the bottom of the two tanks pressurizes the coal gas to 5.5MPa and then provides high-pressure injected coal gas water for a crushed coal pressure gasification section and a crude gas cooling section respectively; a gas water delivery pump 12 connected to the bottom of the first buffer tank 8 pressurizes the gas water to 0.75MPa, and then supplies low-pressure injection gas water to the crushed coal through pressurized gasification.
4. Filtration and backwashing of the dual media filter 14
1) Filtration of the Dual media Filter 14
The internal bed layers of the double-medium filter 14 are divided into three layers from top to bottom: filter media coke, sand and support stones (not shown).
Substances such as suspended solids, oil and tar in the gas water treated by the final oil separator 11 are further treated in a double-medium filter 14 by utilizing the coke adsorption characteristic to remove impurities.
The gas water enters the double-medium filter 14 from the top, is filtered by the bed layer to the bottom, is sent to the gas water storage tank 15 after being filtered, and can be sent out of the battery compartment to phenol ammonia recovery by the product gas water pump 16.
2) Backwashing of the dual media filter 14
The product gas water pump 16 can be divided into two paths after taking water from the gas water storage tank 15: one path is sent out of the battery compartment to the phenol ammonia recovery, the other path is sent to a flushing gas water heat exchanger 17 to be heated to 60 ℃ and then sent to a flushing tank 18, and hot gas water in the flushing tank 18 is sent to the bottom of the double-medium filter 14 through a filter flushing pump 19 to be flushed at high speed and in a counter-current mode. To prevent the slurry from entraining coke in the filter medium, the maximum flushing volume is 1000m3/h。
After the double-medium filter 14 is flushed, slurry, oil and the like carried out by the gas water enter a slurry liquid tank 20, and then are sent to the primary tar separator 5 through a slurry liquid conveying pump 21 for cyclic treatment.
5. Treatment of inflation and respiratory gases
1) Expansion gas generated by the dust-containing gas water expander 4 and the oil-containing gas water expander 6 (about 13 KPa)
The expanded gas from the dust-containing gas water expander 4 and the oil-containing gas water expander 6 is respectively connected with a safety water seal 22 of the dust-containing gas water expander and a safety water seal 23 of the oil-containing gas water expander through expanded gas pipeline branches, the two safety water seals are connected with a safety water seal gas-liquid separator 26, and the safety water seal gas-liquid separator 26 is used for emptying and discharging the expanded gas into the atmosphere to protect equipment after the expanded gas is subjected to overpressure in an accident state; the expansion gas is mixed and gathered through the main pipeline of the expansion gas pipeline and then enters the expansion gas cooler 38 together, the expansion gas is cooled to 35-40 ℃, the cooled expansion gas is separated through the expansion gas-liquid separator 39, then is pressurized through the expansion gas blower 40, is cooled through the expansion gas bypass cooler 41 and the expansion gas blower gas-liquid separator 42, is sent to the torch gas-liquid separation tank 34 and the torch water seal tank 35 for gas-liquid separation, and then is sent to the first torch 36 for combustion;
2) the respiratory gas (about 1.5 KPa) generated by the tar sewage tank 27 and the respiratory gas (about 1 KPa) generated by each tank
Compared with the domestic 3.0MPa crushed coal pressure gasification process of respiratory gas (the partial melting gas of gas water after decompression and flash evaporation), the 4.0MPa crushed coal pressure gasification process of respiratory gas has larger on-site air release smell, and the respiratory gas (about 1.5KPa, the pressure is lower and can not be merged into an expansion gas pipe network to be sent to a sulfur recovery device) generated by the tar sewage tank 27 is also released on-site, so that the on-site air release quantity is larger; in order to thoroughly eradicate the field emptying pollution, the 4.0MPa crushed coal pressure gasification process is characterized in that the respiratory gas (about 1.5 KPa) generated by a tar sewage tank 27 is connected with a tar sewage tank safety water seal 24 through a respiratory gas pipeline branch, and the respiratory gas (about 1 KPa) generated by each tank is collected and then is connected with a respiratory gas safety water seal 25 through a respiratory gas pipeline branch, the tar sewage tank safety water seal 24 and the respiratory gas safety water seal 25 are connected with a safety water seal gas-liquid separator 26, and the process is used for emptying and discharging the respiratory gas into the atmosphere to protect equipment after the respiratory gas is subjected to overpressure in an accident state; the respiratory gas is mixed and gathered through the main pipeline of the respiratory gas pipeline and then sent to a second torch 33 for combustion and discharge; meanwhile, when the second torch 33 cannot be used in an accident state or a maintenance state, the breathing gas can be mixed and gathered through the breathing gas pipeline bypass, then sent to the torch gas-liquid separation tank 34 and the torch water seal tank 35 for gas-liquid separation, and then sent to the first torch 36 for combustion and discharge. The respiratory gas from each tank can be controlled to be communicated with the second torch 33 and the torch gas-liquid separation tank 34 through valves.
6. Treatment of liquid discharge
All discharged or overflowed gas water within the range of the utility model flows into the tar sewage tank 27, and then the gas water is sent to the primary tar separator 5 through the tar sewage pump 28 for oil-water separation.
Claims (9)
1. An apparatus for separating crushed coal gasifier gas water, the apparatus comprising:
a dust-containing gas water expander (4),
an oil-containing gas water expander (6),
a tar sewage tank (27),
a primary tar separator (5) for separating the coal gas water from the dust-containing coal gas water expander (4) and the coal gas water from the tar sewage tank (27),
an oil separator (7) for separating gas water from the oil-containing gas water expander (6),
a final oil separator (11) for separating the gas water after the decompression and oil separation from the primary tar separator (5) and the gas water after the decompression and oil separation from the oil separator (7),
a dual medium filter (14) for filtering gas water from the final oil separator (11), and
a gas water storage tank (15) for storing the filtered gas water from the dual-medium filter (14),
it is characterized in that the preparation method is characterized in that,
the device also comprises a safety water seal (22) of the dust-containing gas water expander, a safety water seal (23) of the oil-containing gas water expander and a safety water seal gas-liquid separator (26) connected with the safety water seal and the safety water seal, wherein the dust-containing gas water expander (4) is connected with the safety water seal (22) of the dust-containing gas water expander through an expansion gas pipeline branch, the oil-containing gas water expander (6) is connected with the safety water seal (23) of the oil-containing gas water expander through an expansion gas pipeline branch,
The device also comprises a flare gas-liquid separation tank (34), a flare water seal tank (35), a first flare (36), an expansion gas cooler (38) and an expansion gas-liquid separator (39) for separating the expansion gas from the expansion gas cooler (38); wherein the dust-containing gas water expander (4) and the oil-containing gas water expander (6) are connected with the expansion gas cooler (38) through an expansion gas pipeline main path, the expansion gas cooler (38) is connected with the expansion gas-liquid separator (39) through a pipeline, the expansion gas-liquid separator (39) is connected with the torch gas-liquid separation tank (34) through a pipeline, the torch gas-liquid separation tank (34) is connected with the torch water-sealed tank (35) through a pipeline, and the torch water-sealed tank (35) is connected with the first torch (36) through a pipeline, and
the device also comprises a tar sewage tank safety water seal (24), a breathing gas safety water seal (25) and a second torch (33), wherein the tar sewage tank (27) is connected with the tar sewage tank safety water seal (24) through a breathing gas pipeline branch, the initial tar separator (5), the oil separator (7), the final oil separator (11) and the gas water storage tank (15) are connected with the breathing gas safety water seal (25) through the breathing gas pipeline branch, the tar sewage tank safety water seal (24) and the breathing gas safety water seal (25) are connected with the safety water seal gas-liquid separator (26) through pipelines, and the initial tar separator (5), the oil separator (7), the final oil separator (11), the gas water storage tank (15) and the tar sewage tank (27) are connected with the second torch (33) through breathing gas pipelines.
2. The device according to claim 1, wherein the device further comprises a tar tank (29) for storing tar from the primary tar separator (5) and an oil tank (30) for storing oil from the final oil separator (11), the tar tank (29) being connected via a breathing gas line with the breathing gas safety water seal (25) and the second flare (33), respectively, and the oil tank (30) being connected via a breathing gas line with the breathing gas safety water seal (25) and the second flare (33), respectively.
3. The device according to claim 1, wherein the bottoms of the dust-containing gas water expander safety water seal (22), the oil-containing gas water expander safety water seal (23), the tar sewage tank safety water seal (24), the breathing gas safety water seal (25) and the safety water seal gas-liquid separator (26) are connected with the tar sewage tank (27).
4. The device according to claim 2, wherein the initial tar separator (5), the oil separator (7), the final oil separator (11), the gas water reservoir (15), the tar sump (27), the tar sump (29) and the oil sump (30) are connected to the flare gas-liquid separation tank (34) via a breathing gas line and a valve.
5. The plant as claimed in any of claims 1 to 4, wherein the plant further comprises an expansion gas blower (40) and an expansion gas bypass cooler (41), the gas outlet of the expansion gas-liquid separator (39) being connected to the expansion gas bypass cooler (41) via the expansion gas blower (40), the expansion gas bypass cooler (41) being connected to the flare gas-liquid separation tank (34) via a line.
6. The apparatus according to any one of claims 1 to 4, wherein the apparatus further comprises an expansion gas blower (40), an expansion gas bypass cooler (41) and an expansion gas blower gas-liquid separator (42), the gas outlet of the expansion gas-liquid separator (39) being connected with the expansion gas bypass cooler (41) via the expansion gas blower (40), the expansion gas bypass cooler (41) being connected with the expansion gas blower gas-liquid separator (42) via a pipeline, and the expansion gas blower gas-liquid separator (42) being connected with the flare gas-liquid separation tank (34) via a pipeline.
7. The device according to any one of claims 1 to 4, wherein the device further comprises a flare condensate pump (32) arranged at the bottom of the second flare (33).
8. The device according to any one of claims 1 to 4, wherein the device further comprises a first buffer tank (8) and a second buffer tank (9), wherein the preliminary tar separator (5) and the oil separator (7) are connected with the first buffer tank (8), the final oil separator (11), the second buffer tank (9) and the dual media filter (14) are connected in sequence, the first buffer tank (8) is connected with the breathing gas safety water seal (25) and the second flare (33) via breathing gas lines, respectively, and the second buffer tank (9) is connected with the breathing gas safety water seal (25) and the second flare (33) via breathing gas lines, respectively; and the first buffer tank (8) and the second buffer tank (9) are connected to a gas-liquid separation tank (34) via a respiratory gas line and a valve.
9. The device according to any one of claims 1 to 4, wherein the device further comprises a slurry tank (20) for storing slurry from the dual media filter (14) and the gas water reservoir (15), wherein the slurry tank (20) is connected via a breathing gas line to a breathing gas safety water seal (25) and a second torch (33), respectively; and the slurry tank (20) is connected with the gas-liquid separation tank (34) through a respiratory gas pipeline and a valve.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111362378A (en) * | 2018-12-26 | 2020-07-03 | 苏州永峰联环保科技有限公司 | Treatment method and treatment device for gas water of gas furnace |
| CN111499025A (en) * | 2020-05-27 | 2020-08-07 | 赛鼎工程有限公司 | System and method capable of increasing processing capacity of gas-water separation device |
| CN111518598A (en) * | 2020-05-27 | 2020-08-11 | 赛鼎工程有限公司 | Gas-water separation respiratory gas collection system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111362378A (en) * | 2018-12-26 | 2020-07-03 | 苏州永峰联环保科技有限公司 | Treatment method and treatment device for gas water of gas furnace |
| CN111499025A (en) * | 2020-05-27 | 2020-08-07 | 赛鼎工程有限公司 | System and method capable of increasing processing capacity of gas-water separation device |
| CN111518598A (en) * | 2020-05-27 | 2020-08-11 | 赛鼎工程有限公司 | Gas-water separation respiratory gas collection system and method |
| CN112794475A (en) * | 2020-12-25 | 2021-05-14 | 上海泽玛克敏达机械设备有限公司 | Oil-containing phenol water separation process method |
| CN112850945A (en) * | 2020-12-25 | 2021-05-28 | 上海泽玛克敏达机械设备有限公司 | Dust-containing phenol water separation process and separation method |
| CN114225617A (en) * | 2021-12-17 | 2022-03-25 | 镇海石化工程股份有限公司 | Method for treating heavy oil gas with high condensation point |
| CN114225617B (en) * | 2021-12-17 | 2023-09-08 | 镇海石化工程股份有限公司 | High-condensation-point heavy oil gas treatment method |
| CN117883929A (en) * | 2024-03-15 | 2024-04-16 | 新疆天利石化股份有限公司 | Device and process for treating and recovering tail gas discharged by carbon five processing industrial chain |
| CN117883929B (en) * | 2024-03-15 | 2024-05-28 | 新疆天利石化股份有限公司 | Device and process for treating and recovering tail gas discharged by carbon five processing industrial chain |
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