CN111518598A - Gas-water separation respiratory gas collection system and method - Google Patents
Gas-water separation respiratory gas collection system and method Download PDFInfo
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- CN111518598A CN111518598A CN202010461377.2A CN202010461377A CN111518598A CN 111518598 A CN111518598 A CN 111518598A CN 202010461377 A CN202010461377 A CN 202010461377A CN 111518598 A CN111518598 A CN 111518598A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 522
- 230000000241 respiratory effect Effects 0.000 title claims abstract description 249
- 238000000926 separation method Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 784
- 239000007788 liquid Substances 0.000 claims abstract description 80
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 76
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 17
- 239000000872 buffer Substances 0.000 claims description 121
- 239000000428 dust Substances 0.000 claims description 63
- 239000000047 product Substances 0.000 claims description 58
- 239000003034 coal gas Substances 0.000 claims description 56
- 238000011010 flushing procedure Methods 0.000 claims description 50
- 239000010865 sewage Substances 0.000 claims description 47
- 239000002002 slurry Substances 0.000 claims description 39
- 238000001816 cooling Methods 0.000 claims description 28
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 27
- 238000002309 gasification Methods 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 238000010992 reflux Methods 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 9
- 238000007872 degassing Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 4
- XABJJJZIQNZSIM-UHFFFAOYSA-N azane;phenol Chemical compound [NH4+].[O-]C1=CC=CC=C1 XABJJJZIQNZSIM-UHFFFAOYSA-N 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000013589 supplement Substances 0.000 claims description 2
- 239000011269 tar Substances 0.000 claims 55
- 238000012374 filter flush Methods 0.000 claims 1
- 239000002641 tar oil Substances 0.000 claims 1
- 238000003860 storage Methods 0.000 abstract description 27
- 239000003245 coal Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000012855 volatile organic compound Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
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- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Industrial Gases (AREA)
Abstract
The invention provides a gas-water separation respiratory gas collection system and a method, belongs to the field of gas-water separation, and aims to solve the problems that part of respiratory gas is discharged into the atmosphere and the required nitrogen amount is large in the conventional system. The top breathing gas pipelines of the normal-pressure storage tanks are connected with the breathing gas collecting main pipe, so that the top spaces of the normal-pressure storage tanks are mutually communicated, the breathing gas collecting main pipe is connected into the breathing gas cabinet, the system pressure can be ensured to be in micro-positive pressure, and when the breathing gas volume of each normal-pressure storage tank is increased, the breathing gas is discharged into the breathing gas cabinet; and (4) inhaling air from the breathing air tank when the breathing air volume of each normal pressure storage tank is reduced. The respiratory gas in the respiratory gas cabinet can be sent out of the boundary region through the respiratory gas frequency conversion fan for controlling the liquid level of the gas cabinet. Because the respiratory gas is an unstable gas source, the respiratory gas return pipe realizes that the respiratory gas can return to the respiratory gas holder when the gas volume is small. Through setting up the low supplementary nitrogen gas valve of gas holder liquid level, make and can in time mend nitrogen gas when breathing gas holder liquid level reduces very fast.
Description
Technical Field
The invention relates to the technical field of gas-water separation, in particular to a system and a method for collecting gas-water separated breathing gas.
Background
The crushed coal pressure gasification gas-water separation device generally adopts the processes of cooling, decompression expansion and gravity settling to separate coal dust, dissolved gas, tar and oil in gas water. The device flow is provided with a plurality of separators and buffers, for example, an initial tar separator, an oil separator, a final oil separator, a buffer tank, a pure tar tank, an oil tank, a tar sewage tank, and the like. The separators and the process buffer tank adopt the design of an atmospheric storage tank shown in the figure 1, and the top of the separator and the process buffer tank is provided with a nitrogen seal pipeline with a self-operated regulating valve, a single-breath valve (18) and a breath valve (16). The self-operated regulating valve is an air supplementing device under normal working conditions, low-pressure nitrogen is introduced into the equipment when the pressure of the storage tank is lower than 0kPa (g), and the low-pressure nitrogen is stopped being introduced into the equipment when the pressure of the storage tank reaches 2kPa (g). The single-breath valve (18) is an exhaust device under normal working conditions, when the pressure of the storage tank reaches 2kPa (g), the breath is exhausted outwards, and the breath is exhausted at the high point of the device after being collected by an inner pipeline of the device. The breathing valve (16) is an overpressure discharge device of the storage tank, and cannot be opened when the nitrogen-sealed self-operated regulating valve and the single-breath valve (18) operate normally, when the self-operated regulating valve or the single-breath valve (18) fails, breathing gas can be discharged to the atmosphere on the top of the storage tank in situ when the pressure of the storage tank reaches 4kPa (g), and air can be sucked into the storage tank when the pressure of the storage tank reaches-0.5 kPa (g).
At a certain 40 hundred million Nm3The/h coal-to-natural gas project is an example (42 crushed coal pressurized gasification furnaces are normally opened in the project). Mainly discharges carbon dioxide and nitrogen in the respiratory gas, and the maximum flow per hour is 300Nm3. The volume content of harmful substances is CH4:4761.90mg/m3、C2 +:1250.00mg/m3、H2S:1517.86mg/m3、COS:1785.71mg/m3、NH3:5312.50mg/m3. The concentration of VOCs is 1250mg/m3. The discharge of VOCs can reach 3 tons at most all the year by the total operation of 40 hundred million natural gas projects. About 200 crushed coal pressurized gasifiers (including solid slag discharge and slag gasification) are currently operated nationwide. The gas-water separation device discharges about 14 tons of VOCs each year.
With the gradual strictness of the environmental protection requirement, the further treatment problem of the respiratory gas is promoted, and the currently adopted processes mainly comprise two types. The first method is that a fan is added behind the original collecting pipe to draw the respiratory air out of the boundary area for burning; the second method is that a Venturi air extractor is added behind the original collecting pipe, and the breathing air is sucked to an expansion air system to be sent out of the boundary area for burning by utilizing the negative pressure generated when the pressure of the power air passes through the Venturi. Because the gas-water separation device occupies a wide area, the distance between each device and the air extraction point is unequal, and the resistance drop from the device to the air extraction point is unequal. When a fan or a venturi tube is used for air suction, the pressure of equipment close to an air suction point is reduced, so that the consumption of nitrogen seal gas is increased, and air is sucked in a large amount sometimes. The pressure of the equipment far away from the air extraction point is still high, and the respiratory air is exhausted to the atmosphere through the respiratory valve. The problem that the amount of nitrogen-sealed gas is increased due to the fact that gas pumping equipment is additionally arranged, and the amount of breathing gas is increased is serious, especially when a Venturi tube is adopted for pumping, the using amount of power gas is large, the total gas amount is increased in multiples, and the treatment cost is increased.
Disclosure of Invention
The invention provides a gas-water separation respiratory gas collecting system and a gas-water separation respiratory gas collecting method, aiming at solving the technical problems that part of respiratory gas is discharged into the atmosphere and the required nitrogen amount is large in the existing gas-water separation respiratory gas system.
In order to solve the technical problems, the invention adopts the technical scheme that:
in a first aspect, a gas-water separation respiratory gas collection system is provided, which comprises a respiratory gas collection header pipe, a degassing cabinet respiratory gas delivery pipe, a respiratory gas cabinet, a gas cabinet liquid level control respiratory gas variable frequency fan, an out-of-range respiratory gas delivery pipe, a gas cabinet liquid level control respiratory gas delivery valve, a respiratory gas air release cut-off valve, a respiratory gas blow-off pipe, a gas cabinet liquid level low-supplement nitrogen valve, a nitrogen gas pipeline, a gas water pipeline from a low-temperature methanol washing device, an oil-containing gas pipeline from a gas cooling device, an oil-containing gas water expansion tank, an oil separator, a top respiratory gas pipeline of the oil separator, a final oil separator, a top respiratory gas pipeline of the final oil separator, a tar-containing gas water pipeline from the gas cooling device, a dust-containing gas water pipeline from the gasification device, a gas water heat exchanger, a dust-containing gas water cooler, a dust-containing gas water expansion tank, A tar initial separator, a top respiratory gas pipeline of the tar initial separator, a pure tar tank, a top respiratory gas pipeline of the pure tar tank, a pure tar pump, an oil tank, a top respiratory gas pipeline of the oil tank, an oil pump, a first buffer tank, a top respiratory gas pipeline of the first buffer tank, a gas water delivery pump, a gas water jet pump, a primary gas water cooler, a secondary gas water cooler, a second buffer tank, a top respiratory gas pipeline of the second buffer tank, a gas water delivery pump, a dual-medium filter, a product gas water buffer tank, a top respiratory gas pipeline of the product gas water buffer tank, a product gas water pump, a product gas water pipeline, a flushing gas water heater, a flushing tank, a filter flushing pump, a slurry tank, a top respiratory gas pipeline of the slurry tank, a slurry pump, a tar sewage tank, a top respiratory gas pipeline of the tar tank and a tar sewage pump, wherein: the coal gas water pipeline from the low-temperature methanol washing device and the oil-containing coal gas pipeline from the coal gas cooling device are both connected with a coal gas water inlet of the oil-containing coal gas water expansion tank; a gas water outlet of the oil-containing gas water expansion tank is connected with a gas water inlet of the oil separator, an oil outlet of the oil separator is connected with an oil inlet of the oil tank, an oil outlet of the oil tank is connected with the oil pump, and a gas water outlet of the oil separator is connected with a gas water inlet of the final oil separator; the tar-containing gas water pipeline from the gas cooling device and the dust-containing gas water pipeline from the gasification device are both connected with a gas water inlet of a gas water heat exchanger, a gas water outlet of the gas water heat exchanger is connected with a gas water inlet of a dust-containing gas water cooler, and a gas water outlet of the dust-containing gas water cooler is connected with a gas water inlet of a dust-containing gas water expansion tank; a gas water outlet of the dust-containing gas water expansion tank is connected with a gas water inlet of the primary tar separator, a tar outlet of the primary tar separator is connected with a tar inlet of the pure tar tank, and the pure tar pump is connected with the bottom of the pure tar tank; the gas water outlet of the initial tar separator is connected with the gas water inlet of the final oil separator, the gas water outlet of the initial tar separator and the gas water outlet of the oil separator are also connected with the gas water inlet of the first buffer tank, the gas water outlet of the first buffer tank is connected with the gas water inlet of the gas water delivery pump, the gas water outlet of the gas water delivery pump is connected with the gas water inlet of the first-stage gas water cooler, the gas water outlet of the first-stage gas water cooler is connected with the gas water inlet of the second-stage gas water cooler, the gas water outlet of the second-stage gas water cooler is connected with the gas water inlet of the final oil separator, the gas water outlet of the first-stage gas water cooler is also connected with the gas water inlet of the final oil separator, the gas water outlet of the final oil separator is connected with the gas water inlet of the second buffer tank, and the jet gas water pump is connected with the gas water outlet of the first buffer tank, a coal gas water inlet of the coal gas injection water pump is connected with a coal gas water outlet of the first buffer tank, a coal gas water outlet of the coal gas injection water pump is connected with a coal gas injection water inlet of the coal gas water heat exchanger, the bottoms of the first buffer tank and the second buffer tank are connected, and the coal gas injection water pump are also connected with the second buffer tank; a gas water outlet of the second buffer tank is connected with a gas water inlet of a gas water delivery pump, a gas water outlet of the gas water delivery pump is connected with a gas water inlet of a double-medium filter, a gas water outlet of the double-medium filter is connected with a gas water inlet of a product gas water buffer tank, and a gas water outlet of the product gas water buffer tank is connected with a product gas water pipeline through a product gas water pump; the product gas water pipeline is also connected with a gas water inlet of the flushing gas water heater, a gas water outlet of the flushing gas water heater is connected with a gas water inlet of the flushing tank, a gas water outlet of the flushing tank is connected with a flushing water inlet of the double-medium filter through a filter flushing pump, a mud liquid outlet of the double-medium filter is connected with a mud liquid inlet of the mud liquid tank, and a mud liquid outlet of the mud liquid tank is connected with a mud liquid inlet of the primary tar separator through a mud liquid pump; the tar sewage outlets of the oil-containing gas water expansion tank, the oil separator, the final oil separator, the dust-containing gas water expansion tank, the pure tar tank, the oil tank, the first buffer tank, the second buffer tank, the product gas water buffer tank, the flushing tank and the slurry tank are all connected with a tar sewage inlet of the tar sewage tank, and the tar sewage outlet of the tar sewage tank is connected with a gas water inlet of the primary tar separator through a tar sewage pump; the top respiratory gas pipeline of the oil separator, the top respiratory gas pipeline of the oil groove, the top respiratory gas pipeline of the final oil separator, the top respiratory gas pipeline of the primary tar separator, the top respiratory gas pipeline of the pure tar groove, the top respiratory gas pipeline of the first buffer groove, the top respiratory gas pipeline of the second buffer groove, the top respiratory gas pipeline of the product gas water buffer groove, the top respiratory gas pipeline of the slurry liquid groove and the top respiratory gas pipeline of the tar sewage groove are all connected with a respiratory gas collecting main pipe, the top respiratory gas pipeline of the flushing groove is communicated with the top respiratory gas pipeline of the slurry liquid groove, one end of a respiratory gas conveying pipe of the degassing cabinet is connected with the respiratory gas collecting main pipe, the other end of the respiratory gas conveying pipe of the degassing cabinet is connected with a gas inlet of the respiratory gas cabinet, a gas outlet of the respiratory gas cabinet is connected with a respiratory gas conveying pipe of an outlet area through a gas cabinet liquid level control gas variable frequency, the gas holder liquid level control breathes the gas delivery valve and installs on going out boundary area breathes the gas conveyer pipe, and the nitrogen gas pipeline is connected with the breathing gas holder, and the low supplementary nitrogen gas valve of gas holder liquid level is installed on the nitrogen gas pipeline, and the breathing gas blow-down pipe is collected house steward with the breathing gas and is connected, and the breathing gas blow-down trip valve is installed on the breathing gas blow-down pipe.
Optionally, the oil separator, the oil tank, the final oil separator, the preliminary tar separator, the pure tar tank, the first buffer tank, the second buffer tank, the product gas water buffer tank, the flushing tank, the slurry liquid tank and the tar sewage tank all include a tank body, a breathing gas pipeline, a breather valve, a top breathing gas pipeline and a flame arrester, wherein: the breather valve passes through breathing gas pipeline and jar body coupling, and jar body is connected with breathing gas collecting manifold through top breathing gas pipeline, and the spark arrester is installed on top breathing gas pipeline.
Optionally, gas-water separation respiratory gas collecting system still includes respiratory gas back flow pipe, backward flow respiratory gas cooler and gas holder liquid level control respiratory gas return valve, and the both ends of respiratory gas back flow pipe are connected with out-of-range district respiratory gas conveyer pipe and degasser respiratory gas conveyer pipe respectively, and backward flow respiratory gas cooler and gas holder liquid level control respiratory gas return valve are installed on the respiratory gas back flow pipe.
In a second aspect, a gas-water separation breathing gas collecting method is provided, where the gas-water separation breathing gas collecting system of the first aspect is adopted, and the method includes the following steps:
s1, feeding the oil-containing gas water from the gas water pipeline of the low-temperature methanol washing device and the oil-containing gas water from the oil-containing gas pipeline of the gas cooling device into an oil-containing gas water expansion tank, and reducing the pressure in the oil-containing gas water expansion tank to 0-20 kPa;
s2, the decompressed gas water in the oil-containing gas water expansion tank flows into an oil separator, the oil in the gas water floats to the upper layer and overflows to an oil groove through an overflow weir in the oil separator, the oil recovered in the oil groove is pumped to a tank area through an oil pump, and the gas water treated by the oil separator is sent to a final oil separator;
s3, allowing the dust-containing gas water sent from the tar-containing gas water pipeline of the gas cooling device and the tar-containing gas water sent from the tar-containing gas water pipeline of the gasification device to enter a gas water heat exchanger, exchanging heat with high-pressure jet gas water sent to a pressurization gasification and conversion device in the gas water heat exchanger, allowing the gas water after heat exchange to enter a dust-containing gas water cooler, mixing the dust-containing gas water cooled by the dust-containing gas water cooler with low-pressure dust-containing gas water from the gasification device, allowing the mixture to enter a dust-containing gas water expansion tank, and expanding the mixture to 0-20 kPa in the dust-containing gas water expansion tank;
s4, allowing the dust-containing gas water from the dust-containing gas water expansion tank to flow into a primary tar separator and separating in the primary tar separator, wherein dust and tar in the dust-containing gas water are settled in a conical body part at the lower part of the primary tar separator, and the tar is separated from the middle lower part of the primary tar separator and flows to a pure tar tank and is pumped to a tank area through a pure tar pump;
s5, allowing part of the gas water from the initial tar separator and the gas water from the oil separator to flow into the final oil separator and the other part of the gas water from the initial tar separator to flow into a first buffer tank by virtue of gravity, or allowing the gas water from the initial tar separator and the gas water from the oil separator to flow into the first buffer tank by virtue of gravity, then conveying the gas water into a first-stage gas water cooler and a second-stage gas water cooler by a gas water conveying pump, cooling the gas water by the first-stage gas water cooler and the second-stage gas water cooler and then allowing the gas water to flow into the final oil separator, and allowing the gas water in the final oil separator to flow into a second buffer tank by virtue of gravity; one part of the gas water in the first buffer tank is pressurized by a gas water injection pump and then sent to a conversion cooling device, and the other part of the gas water is pressurized by the gas water injection pump, preheated by a gas water heat exchanger and then sent to a pressurization gasification and conversion cooling device;
s6, conveying the gas water in the second buffer tank into a double-medium filter for filtering through a gas water conveying pump, conveying the filtered gas water into a product gas water buffer tank, and conveying the product gas water to a phenol ammonia recovery device through a product gas water pump and a product gas water pipeline;
s7, pumping a coal gas stream from a coal gas stream pipeline by a coal gas product water pump, sending the coal gas stream to a flushing coal gas water heater, heating the coal gas stream by the flushing coal gas water heater, then entering a flushing tank, pressurizing the coal gas stream by a filter flushing pump, then entering a double-medium filter to flush the double-medium filter, sending the flushed slurry to a slurry tank, and pressurizing the slurry by a slurry pump, then sending the slurry to a primary tar separator;
s8, feeding tar and sewage discharged from the oil-containing gas water expansion tank, the oil separator, the final oil separator, the dust-containing gas water expansion tank, the pure tar tank, the oil tank, the first buffer tank, the second buffer tank, the product gas water buffer tank, the flushing tank and the slurry tank into a tar and sewage tank, and feeding the tar and sewage into the primary tar separator through a tar and sewage pump;
and S9, collecting the respiratory gas collected by the oil separator, the oil groove, the final oil separator, the initial tar separator, the pure tar groove, the first buffer groove, the second buffer groove, the product gas water buffer groove, the slurry liquid groove and the tar sewage groove into a respiratory gas collecting main pipe, collecting the respiratory gas into a respiratory gas cabinet through a respiratory gas conveying pipe of a gas cabinet, and conveying the respiratory gas into a boundary area through a respiratory gas emptying pipe after the respiratory gas is pressurized by a respiratory gas variable frequency fan controlled by the gas cabinet liquid level.
Optionally, the gas-water separation breathing gas collection method further comprises: and opening a liquid level control respiratory gas reflux valve of the gas holder, returning the respirator to the respiratory gas holder through a respiratory gas reflux pipe, and cooling the temperature of the respiratory gas returning to the respiratory gas holder through a reflux respiratory gas cooler.
The invention has the beneficial effects that:
the top respiratory gas pipelines of the normal pressure storage tanks are connected with the respiratory gas collecting main pipe, and the respiratory gas cabinet and peripheral equipment are arranged, so that the top spaces of the normal pressure storage tanks are mutually communicated, and the respiratory gas collecting main pipe is connected into the respiratory gas cabinet, so that the system pressure can be ensured to be at micro-positive pressure, and when the respiratory gas volume of each normal pressure storage tank is increased, the respiratory gas is discharged into the respiratory gas cabinet; when the respiratory air volume of each normal pressure storage tank is reduced, air is sucked from the respiratory air cabinet, and the respiratory air is directly prevented from being discharged into the atmosphere. The respiratory gas in the respiratory gas cabinet can be sent out of the boundary region through the respiratory gas frequency conversion fan for controlling the liquid level of the gas cabinet. Because the respiratory gas is an unstable gas source, the respiratory gas can be returned to the respiratory gas tank when the gas volume is small by the respiratory gas return pipe and the gas tank liquid level control respiratory gas return valve. Through setting up gas holder liquid level low supplementary nitrogen gas valve and nitrogen gas pipeline for can in time mend nitrogen gas when breathing gas holder liquid level reduces very fast.
Taking a 40 hundred million coal-based natural gas project as an example, the invention has the following beneficial effects:
(1) the steady voltage effect of breathing gas cabinet is better, and the condition that the accidental superpressure that can effectively reduce equipment made breathing gas pass through the breather valve and arrange to atmospheric takes place.
(2) Along with the reduction of the large air volume discharged by the respiratory gas, the discharge of VOCs can be reduced by 3 tons every year. According to different coal types, the coal gas generated by the gasification furnace has different components, so the discharge amount of VOCs is slightly changed.
(3) Along with the reduction of the large gas discharge of the respiratory gas and the reduction of 3.6 tons of discharged hydrogen sulfide every year, 4.3 tons of carbonyl sulfide every year. If high sulfur coal is used, the hydrogen sulfide emission reduction may be multiplied.
(4) As each normal pressure storage tank does not need to be respectively filled with nitrogen, the method can save 200-250Nm in each hour3Nitrogen gas.
(5) The gas-water separation system is ensured to be in a micro-positive pressure state for a long time, and the condition that air is sucked due to negative pressure generation when a fan or a Venturi air extractor is adopted for conveying can be prevented. Especially for systems where respiratory gases are treated together with other combustible gases, the safety risk is greatly reduced.
(6) Because the whole system reduces the amount of nitrogen-sealed gas in the respiratory gas, the total amount of the respiratory gas is greatly reduced, the conveying energy consumption can be saved, and the treatment cost can be reduced.
Drawings
Fig. 1 is a schematic diagram of a prior art atmospheric storage tank.
FIG. 2 is a schematic diagram of the system components of the present invention.
Fig. 3 is a partially enlarged view of a portion a in fig. 2.
Fig. 4 is a partially enlarged view of a portion B in fig. 2.
Fig. 5 is a partially enlarged view of a portion C in fig. 2.
Fig. 6 is a partially enlarged view of a portion D in fig. 2.
Fig. 7 is a partially enlarged view of a portion E in fig. 2.
Fig. 8 is a schematic structural view of the atmospheric storage tank of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 2 to 7, the embodiment of the present invention provides a gas-water separation respiratory gas collection system, which includes a respiratory gas collection main pipe 1, a degassing cabinet respiratory gas delivery pipe 2, a respiratory gas cabinet 3, a gas cabinet liquid level control respiratory gas variable frequency fan 7, an out-of-range respiratory gas delivery pipe 8, a gas cabinet liquid level control respiratory gas delivery valve 9, a respiratory gas emptying stop valve 10, a respiratory gas emptying pipe 11, a gas cabinet liquid level low supplemental nitrogen valve 12, a nitrogen gas pipe 13, a gas water pipe 22 from a low temperature methanol washing device, an oil-containing gas pipe 23 from a gas cooling device, an oil-containing gas water expansion tank 24, an oil separator 25, a top respiratory gas pipe 26 of the oil separator 25, a final oil separator 27, a top respiratory gas pipe 28 of the final oil separator 27, a tar-containing gas pipe 29 from the gas cooling device, a dust-containing water pipe 30 from a gasification device, a dust-containing water pipe 30, a dust-, A gas water heat exchanger 31, a dust-containing gas water cooler 32, a dust-containing gas water expansion tank 33, a pre-tar separator 34, a top breathing gas pipeline 35 of the pre-tar separator 34, a pure tar tank 36, a top breathing gas pipeline 37 of the pure tar tank 36, a pure tar pump 38, an oil tank 39, a top breathing gas pipeline 40 of the oil tank 39, an oil pump 41, a first buffer tank 42, a top breathing gas pipeline 43 of the first buffer tank 42, a gas water delivery pump 44, a jet gas water pump 45, a jet gas water pump 46, a primary gas water cooler 47, a secondary gas water cooler 48, a second buffer tank 49, a top breathing gas pipeline 50 of the second buffer tank 49, a gas water delivery pump 51, a dual-medium filter 52, a product gas water buffer tank 53, a top breathing gas pipeline 54 of the product gas water buffer tank 53, a product gas water pump 55, a product gas water pipeline 56, a flushing water heater 57, a gas water heater, Flushing tank 58, filter flushing pump 59, slurry tank 60, top breathing air pipe 61 of slurry tank 60, slurry pump 62, tar sewage tank 63, top breathing air pipe 64 of tar sewage tank 63 and tar sewage pump 65, wherein: the gas water pipeline 22 from the low-temperature methanol washing device and the oil-containing gas pipeline 23 from the gas cooling device are both connected with a gas water inlet of an oil-containing gas water expansion tank 24; a gas water outlet of the oil-containing gas water expansion tank 24 is connected with a gas water inlet of the oil separator 25, an oil outlet of the oil separator 25 is connected with an oil inlet of the oil groove 39, an oil outlet of the oil groove 39 is connected with the oil pump 41, and a gas water outlet of the oil separator 25 is connected with a gas water inlet of the final oil separator 27; a tar-containing gas water pipeline 29 from the gas cooling device and a dust-containing gas water pipeline 30 from the gasification device are both connected with a gas water inlet of a gas water heat exchanger 31, a gas water outlet of the gas water heat exchanger 31 is connected with a gas water inlet of a dust-containing gas water cooler 32, and a gas water outlet of the dust-containing gas water cooler 32 is connected with a gas water inlet of a dust-containing gas water expansion tank 33; a gas water outlet of the dust-containing gas water expansion tank 33 is connected with a gas water inlet of the primary tar separator 34, a tar outlet of the primary tar separator 34 is connected with a tar inlet of the pure tar tank 36, and a pure tar pump 38 is connected with the bottom of the pure tar tank 36; the gas water outlet of the initial tar separator 34 is connected with the gas water inlet of the final oil separator 27, the gas water outlet of the initial tar separator 34 and the gas water outlet of the oil separator 25 are both connected with the gas water inlet of the first buffer tank 42, the gas water outlet of the first buffer tank 42 is connected with the gas water inlet of the gas water delivery pump 44, the gas water outlet of the gas water delivery pump 44 is connected with the gas water inlet of the primary gas water cooler 47, the gas water outlet of the primary gas water cooler 47 is connected with the gas water inlet of the secondary gas water cooler 48, the gas water outlet of the secondary gas water cooler 48 is connected with the gas water inlet of the final oil separator 27, the gas water outlet of the primary gas water cooler 47 is also connected with the gas water inlet of the final oil separator 27, the gas water outlet of the final oil separator 27 is connected with the gas water inlet of the second buffer tank 49, the coal gas injection water pump 46 is connected with a coal gas water outlet of the first buffer groove 42, a coal gas water inlet of the coal gas injection water pump 45 is connected with a coal gas water outlet of the first buffer groove 42, a coal gas water outlet of the coal gas injection water pump 45 is connected with a coal gas water injection inlet of the coal gas water heat exchanger 31, the first buffer groove 42 is connected with the bottom of the second buffer groove 49, and the coal gas injection water pump 45 and the coal gas injection water pump 46 are also connected with the second buffer groove 49; a gas water outlet of the second buffer tank 49 is connected with a gas water inlet of a gas water delivery pump 51, a gas water outlet of the gas water delivery pump 51 is connected with a gas water inlet of a double-medium filter 52, a gas water outlet of the double-medium filter 52 is connected with a gas water inlet of a product gas water buffer tank 53, and a gas water outlet of the product gas water buffer tank 53 is connected with a product gas water pipeline 56 through a product gas water pump 55; the product gas water pipeline 56 is also connected with a gas water inlet of a flushing gas water heater 57, a gas water outlet of the flushing gas water heater 57 is connected with a gas water inlet of a flushing tank 58, a gas water outlet of the flushing tank 58 is connected with a flushing water inlet of the dual-medium filter 52 through a filter flushing pump 59, a mud liquid outlet of the dual-medium filter 52 is connected with a mud liquid inlet of a mud liquid tank 60, and a mud liquid outlet of the mud liquid tank 60 is connected with a mud liquid inlet of the primary tar separator 34 through a mud liquid pump 62; the tar and sewage outlets of the oil-containing gas water expansion tank 24, the oil separator 25, the final oil separator 27, the dust-containing gas water expansion tank 33, the pure tar tank 36, the oil tank 39, the first buffer tank 42, the second buffer tank 49, the product gas water buffer tank 53, the flushing tank 58 and the slurry tank 60 are all connected with the tar and sewage inlet of the tar and sewage tank 63, and the tar and sewage outlet of the tar and sewage tank 63 is connected with the gas water inlet of the primary tar separator 34 through a tar and sewage pump 65; the top respiratory air pipeline 26 of the oil separator 25, the top respiratory air pipeline 40 of the oil groove 39, the top respiratory air pipeline 28 of the final oil separator 27, the top respiratory air pipeline 35 of the primary tar separator 34, the top respiratory air pipeline 37 of the pure tar groove 36, the top respiratory air pipeline 43 of the first buffer groove 42, the top respiratory air pipeline 50 of the second buffer groove 49, the top respiratory air pipeline 54 of the product gas water buffer groove 53, the top respiratory air pipeline 61 of the slurry liquid groove 60 and the top respiratory air pipeline 64 of the tar sewage groove 63 are all connected with the respiratory air collecting main pipe 1, the top respiratory air pipeline of the flushing groove 58 is communicated with the top respiratory air pipeline 61 of the slurry liquid groove 60, so that the respiratory air of the flushing groove 58 is sent into the respiratory air collecting main pipe 1 through the top respiratory air pipeline 61 of the slurry liquid groove 60, one end of the respiratory air conveying pipe 2 of the degassing cabinet is connected with the respiratory air collecting main pipe 1, go gas holder respiratory gas conveyer pipe 2 other end and respiratory gas holder 3's air inlet and be connected, respiratory gas holder 3's gas outlet is connected with out of range respiratory gas conveyer pipe 8 through gas holder liquid level control respiratory gas frequency conversion fan 7, gas holder liquid level control respiratory gas delivery valve 9 is installed on out of range respiratory gas conveyer pipe 8, nitrogen gas pipeline 13 is connected with respiratory gas holder 3, the low supplementary nitrogen gas valve 12 of gas holder liquid level is installed on nitrogen gas pipeline 13, respiratory gas blow-down pipe 11 is connected with respiratory gas collection house steward 1, respiratory gas air release trip valve 10 is installed on respiratory gas blow-down pipe 11.
Alternatively, as shown in fig. 8, the oil separator 25, the oil tank 39, the final oil separator 27, the preliminary tar separator 34, the pure tar tank 36, the first buffer tank 42, the second buffer tank 49, the product gas water buffer tank 53, the flushing tank 58, the slurry tank 60, and the tar sewage tank 63 each include a tank 14 ', a breathing gas pipe 15 ', a breathing valve 16 ', a top breathing gas pipe 17 ', and a flame arrester 19 ', wherein: the breather valve 16 'is connected with the tank body 14' through a breather pipeline 15 ', the tank body 14' is connected with a breather gas collecting main pipe 1 'through a top breather pipeline 17', and the flame arrester 19 'is arranged on the top breather pipeline 17'.
The oil separator 25, the oil tank 39, the final oil separator 27, the preliminary tar separator 34, the pure tar tank 36, the first buffer tank 42, the second buffer tank 49, the product gas water buffer tank 53, the flushing tank 58, the slurry tank 60, and the tar sewage tank 63 all belong to a normal pressure storage tank. The atmospheric storage tank shown in fig. 8 is compared with the atmospheric storage tank shown in fig. 1, and the atmospheric storage tank in the embodiment of the present invention has less single exhalation valve 18, so that the headspace of each atmospheric storage tank is collected to the respiratory gas collection manifold 1 through the top respiratory gas pipe 17'. When the gas-water separation breathing gas collection system according to the embodiment of the invention is directly constructed on the basis of fig. 1, the self-operated nitrogen regulating valve 20 and the nitrogen pipeline 21 in fig. 1 can be retained, and only the filter element of the single breathing valve 18 in fig. 1 is removed, so that the atmospheric storage tanks are communicated with the breathing gas collection main pipe 1 through the top breathing gas pipelines 17 of the atmospheric storage tanks.
Optionally, gas-water separation respiratory gas collection system still includes respiratory gas back flow pipe 4, backward flow respiratory gas cooler 5 and gas holder liquid level control respiratory gas return valve 6, and respiratory gas back flow pipe 4's both ends are connected with out border region respiratory gas conveyer pipe 8 and go to gas holder respiratory gas conveyer pipe 2 respectively, and backward flow respiratory gas cooler 5 and gas holder liquid level control respiratory gas return valve 6 install on respiratory gas back flow pipe 4.
The embodiment of the invention also provides a gas-water separation breathing gas collecting method, which is realized by adopting the gas-water separation system of the embodiment and comprises the following steps:
s1, feeding the oil-containing gas water from the gas water pipeline 22 of the low-temperature methanol washing device and the oil-containing gas water from the oil-containing gas pipeline 23 of the gas cooling device into the oil-containing gas water expansion tank 24, and reducing the pressure in the oil-containing gas water expansion tank 24 to 0-20 kPa (g).
S2, the decompressed gas water in the oil-containing gas water expansion tank 24 flows into the oil separator 25, the oil in the gas water floats to the upper layer and overflows to the oil tank 39 through the overflow weir in the oil separator 25, the oil recovered in the oil tank 39 is sent to the tank area through the oil pump 41, and the gas water treated by the oil separator 25 is sent to the final oil separator 27.
S3, allowing the dust-containing gas water sent from the tar-containing gas water pipeline 29 of the gas cooling device and the tar-containing gas water sent from the dust-containing gas water pipeline 30 of the gasification device to enter a gas water heat exchanger 31, exchanging heat with high-pressure jet gas water sent to a pressurization gasification and conversion device in the gas water heat exchanger 31, allowing the gas water after heat exchange to enter a dust-containing gas water cooler 32, mixing the dust-containing gas water cooled by the dust-containing gas water cooler 32 with low-pressure dust-containing gas water from the gasification device, allowing the mixture to enter a dust-containing gas water expansion tank 33, and expanding the mixture to 0-20 kPa (g) in the dust-containing gas water expansion tank 33.
S4, the gas water containing dust from the gas water containing dust expansion tank 33 flows into the primary tar separator 34 and is separated in the primary tar separator 34, the dust and tar in the gas water containing dust settle in the cone part at the lower part of the primary tar separator 34, and the tar is separated from the middle lower part of the primary tar separator 34 and flows to the pure tar tank 36 and is sent to the tank area through the pure tar pump 38.
S5, allowing a part of the gas water from the preliminary tar separator 34 and the gas water from the oil separator 25 to flow into the final oil separator 27 by gravity and the other part to flow into the first buffer tank 42, or allowing the gas water from the preliminary tar separator 34 and the gas water from the oil separator 25 to flow into the first buffer tank 42 by gravity, sending the gas water to the primary gas water cooler 47 and the secondary gas water cooler 48 by the gas water delivery pump 44, cooling the gas water by the primary gas water cooler 47 and the secondary gas water cooler 48, and then allowing the gas water to flow into the final oil separator 27, and allowing the gas water in the final oil separator 27 to flow into the second buffer tank 49 by gravity; a part of the gas water in the first buffer tank 42 is pressurized by the gas water injection pump 46 and then sent to the shift cooling device, and the other part of the gas water is pressurized by the gas water injection pump 45, preheated by the gas water heat exchanger 31 and then sent to the pressurization gasification and shift cooling device.
And S6, conveying the gas water in the second buffer tank 49 into a double-medium filter 52 for filtering through a gas water conveying pump 51, conveying the filtered gas water to a product gas water buffer tank 53, and conveying the filtered gas water to a phenol ammonia recovery device through a product gas water pump 55 and a product gas water pipeline 56.
S7, the product gas water pump 55 pumps a gas water from the product gas water pipeline 56 and sends the gas water to the flushing gas water heater 57, the flushing gas water heater 57 heats the gas water and then enters the flushing tank 58, the filter flushing pump 59 pressurizes the gas water and then enters the double-medium filter 52 to flush the double-medium filter 52, the flushed slurry liquid is sent to the slurry liquid tank 60 and pressurized by the slurry liquid pump 62 and then sent to the primary tar separator 34.
The dual media filter 52 is typically designed with two (or four) filters per series, one (or two) operating and the other (or two) standby and optionally flushed.
S8, the tar sewage from the oil-containing gas water expansion tank 24, the oil separator 25, the final oil separator 27, the dust-containing gas water expansion tank 33, the pure tar tank 36, the oil tank 39, the first buffer tank 42, the second buffer tank 49, the product gas water buffer tank 53, the flushing tank 58 and the slurry tank 60 enters the tar sewage tank 63 and is sent to the primary tar separator 34 through the tar sewage pump 65.
And S9, collecting the respiratory air collected by the oil separator 25, the oil groove 39, the final oil separator 27, the preliminary tar separator 34, the pure tar groove 36, the first buffer groove 42, the second buffer groove 49, the product gas water buffer groove 53, the slurry liquid groove 60 and the tar sewage groove 63 into the respiratory air collecting main pipe 1, collecting the respiratory air into the respiratory air cabinet 3 through the respiratory air conveying pipe 2 of the air cabinet, and delivering the respiratory air out of the boundary area through the respiratory air emptying pipe 11 after being pressurized by the respiratory air variable frequency fan 7 controlled by the air cabinet liquid level.
Wherein, the steps are carried out under the state that the respiratory air emptying cut-off valve 10 is closed.
Optionally, the gas-water separation method further comprises: the liquid level control respiratory gas reflux valve 6 of the gas holder is opened, the respiratory gas returns to the respiratory gas holder 3 through the respiratory gas reflux pipe 4, and the temperature of the respiratory gas returning to the respiratory gas holder 3 is cooled through the reflux respiratory gas cooler 5. Whether the respiratory gas reflux valve 6 is opened to enable the respiratory gas to reflux to the respiratory gas cabinet 3 or not is determined by the real-time flow of the respiratory gas frequency conversion fan 7 controlled by the gas cabinet liquid level. When the delivered air volume of the breathing air frequency conversion fan 7 is less than 30% of the normal flow, the breathing air frequency conversion fan 7 cannot normally operate, so that the breathing air is adjusted and returned to the breathing air tank 3 through the breathing air return pipe 4. In addition, receive respiratory gas frequency conversion fan 7 performance influence itself, respiratory gas temperature when 40 ~ 80 ℃, if long-term respiratory gas frequency conversion fan 7 circulation backward flow, probably can make respiratory gas temperature exceed 80 ℃, cool down respiratory gas through backward flow respiratory gas cooler 5 this moment to guarantee that respiratory gas does not exceed 80 ℃. The pressure of the respiratory gas tank 3 is maintained at 1-2kPa (g) by arranging a respiratory gas return pipe 4, a return respiratory gas cooler 5, a tank liquid level control respiratory gas return valve 6 and the like.
In addition, a gas holder liquid level low make-up nitrogen valve 12 and a nitrogen pipe 13 are used for making up nitrogen into the breathing gas holder 3. When the tank material level of the breathing gas tank 3 is reduced to 20% of the normal material level, the nitrogen supplementing valve 12 with low tank liquid level is opened, and nitrogen is supplemented to the breathing gas tank 3.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (5)
1. The gas-water separation breathing gas collection system is characterized by comprising a breathing gas collection main pipe (1), a degassing cabinet breathing gas delivery pipe (2), a breathing gas cabinet (3), a gas cabinet liquid level control breathing gas variable-frequency fan (7), a boundary-region breathing gas delivery pipe (8), a gas cabinet liquid level control breathing gas delivery valve (9), a breathing gas emptying stop valve (10), a breathing gas emptying pipe (11), a gas cabinet liquid level low-supplement nitrogen valve (12), a nitrogen pipeline (13), a gas water pipeline (22) from a low-temperature methanol washing device, an oil-containing gas pipeline (23) from a gas cooling device, an oil-containing gas water expansion tank (24), an oil separator (25), a top breathing gas pipeline (26) of the oil separator (25), a final oil separator (27), a top breathing gas pipeline (28) of the final oil separator (27), a tar-containing gas water pipeline (29) from the gas cooling device, From gasification equipment's dirty gas water pipeline (30), gas water heat exchanger (31), dirty gas water cooler (32), dirty gas water expansion tank (33), initial tar separator (34), the top respiratory gas pipeline (35) of initial tar separator (34), pure tar groove (36), the top respiratory gas pipeline (37) of pure tar groove (36), pure tar pump (38), oil groove (39), the top respiratory gas pipeline (40) of oil groove (39), oil pump (41), first buffer tank (42), the top respiratory gas pipeline (43) of first buffer tank (42), gas water delivery pump (44), injection gas water pump (45), injection gas water pump (46), one-level water cooler (47), second gas water cooler (48), second buffer tank (49), the top respiratory gas pipeline (50) of second buffer tank (49), Gas water delivery pump (51), two medium filter (52), product gas water buffer tank (53), top respiratory gas pipeline (54) of product gas water buffer tank (53), product gas water pump (55), product gas water pipeline (56), wash gas water heater (57), wash tank (58), filter flush pump (59), mud liquid groove (60), top respiratory gas pipeline (61) of mud liquid groove (60), mud liquid pump (62), tar sewage groove (63), top respiratory gas pipeline (64) and tar sewage pump (65) of tar sewage groove (63), wherein:
the gas water pipeline (22) from the low-temperature methanol washing device and the oil-containing gas pipeline (23) from the gas cooling device are both connected with a gas water inlet of the oil-containing gas water expansion tank (24);
a gas water outlet of the oil-containing gas water expansion tank (24) is connected with a gas water inlet of the oil separator (25), an oil outlet of the oil separator (25) is connected with an oil inlet of the oil tank (39), an oil outlet of the oil tank (39) is connected with the oil pump (41), and a gas water outlet of the oil separator (25) is connected with a gas water inlet of the final oil separator (27);
a tar-containing gas water pipeline (29) from the gas cooling device and a dust-containing gas water pipeline (30) from the gasification device are both connected with a gas water inlet of a gas water heat exchanger (31), a gas water outlet of the gas water heat exchanger (31) is connected with a gas water inlet of a dust-containing gas water cooler (32), and a gas water outlet of the dust-containing gas water cooler (32) is connected with a gas water inlet of a dust-containing gas water expansion tank (33);
a gas water outlet of the dust-containing gas water expansion tank (33) is connected with a gas water inlet of the primary tar separator (34), a tar outlet of the primary tar separator (34) is connected with a tar inlet of the pure tar tank (36), and a pure tar pump (38) is connected with the bottom of the pure tar tank (36);
a gas water outlet of the initial tar separator (34) is connected with a gas water inlet of the final oil separator (27), the gas water outlet of the initial tar separator (34) and the gas water outlet of the oil separator (25) are also connected with a gas water inlet of a first buffer tank (42), the gas water outlet of the first buffer tank (42) is connected with a gas water inlet of a gas water delivery pump (44), the gas water outlet of the gas water delivery pump (44) is connected with a gas water inlet of a primary gas water cooler (47), the gas water outlet of the primary gas water cooler (47) is connected with a gas water inlet of a secondary gas water cooler (48), the gas water outlet of the secondary gas water cooler (48) is connected with a gas water inlet of the final oil separator (27), and the gas water outlet of the primary gas water cooler (47) is also connected with the gas water inlet of the final oil separator (27), a coal gas water outlet of the final oil separator (27) is connected with a coal gas water inlet of a second buffer groove (49), a coal gas water jet pump (46) is connected with a coal gas water outlet of a first buffer groove (42), a coal gas water inlet of a coal gas water jet pump (45) is connected with a coal gas water outlet of the first buffer groove (42), a coal gas water outlet of the coal gas water jet pump (45) is connected with a coal gas water jet inlet of a coal gas water heat exchanger (31), the first buffer groove (42) is connected with the bottom of the second buffer groove (49), and the coal gas water jet pump (45) and the coal gas water jet pump (46) are also connected with the second buffer groove (49);
a gas water outlet of the second buffer tank (49) is connected with a gas water inlet of a gas water delivery pump (51), a gas water outlet of the gas water delivery pump (51) is connected with a gas water inlet of a double-medium filter (52), a gas water outlet of the double-medium filter (52) is connected with a gas water inlet of a product gas water buffer tank (53), and a gas water outlet of the product gas water buffer tank (53) is connected with a product gas water pipeline (56) through a product gas water pump (55);
the product gas water pipeline (56) is also connected with a gas water inlet of a flushing gas water heater (57), a gas water outlet of the flushing gas water heater (57) is connected with a gas water inlet of a flushing tank (58), a gas water outlet of the flushing tank (58) is connected with a flushing water inlet of a double-medium filter (52) through a filter flushing pump (59), a mud liquid outlet of the double-medium filter (52) is connected with a mud liquid inlet of a mud liquid tank (60), and a mud liquid outlet of the mud liquid tank (60) is connected with a mud liquid inlet of a primary tar separator (34) through a mud liquid pump (62);
the tar sewage outlets of the oil-containing gas water expansion tank (24), the oil separator (25), the final oil separator (27), the dust-containing gas water expansion tank (33), the pure tar tank (36), the oil tank (39), the first buffer tank (42), the second buffer tank (49), the product gas water buffer tank (53), the flushing tank (58) and the slurry tank (60) are all connected with a tar sewage inlet of a tar sewage tank (63), and the tar sewage outlet of the tar sewage tank (63) is connected with a gas water inlet of the primary tar separator (34) through a tar sewage pump (65);
a top respiratory air pipeline (26) of the oil separator (25), a top respiratory air pipeline (40) of the oil groove (39), a top respiratory air pipeline (28) of the final oil separator (27), a top respiratory air pipeline (35) of the primary tar separator (34), a top respiratory air pipeline (37) of the pure tar groove (36), a top respiratory air pipeline (43) of the first buffer groove (42), a top respiratory air pipeline (50) of the second buffer groove (49), a top respiratory air pipeline (54) of the product gas water buffer groove (53), a top respiratory air pipeline (61) of the slurry liquid groove (60) and a top respiratory air pipeline (64) of the tar sewage groove (63) are all connected with the respiratory air collecting main pipe (1), a top respiratory air pipeline of the flushing groove (58) is communicated with the top respiratory air pipeline (61) of the slurry liquid groove (60), one end of the degassing cabinet respiratory air conveying pipe (2) is connected with the respiratory air collecting main pipe (1), go to the air inlet of gas holder respiratory gas conveyer pipe (2) other end and respiratory gas holder (3) and be connected, the gas outlet of respiratory gas holder (3) is connected with out of bounds district respiratory gas conveyer pipe (8) through gas holder liquid level control respiratory gas frequency conversion fan (7), gas holder liquid level control respiratory gas delivery valve (9) are installed on out of bounds district respiratory gas conveyer pipe (8), nitrogen gas pipeline (13) are connected with respiratory gas holder (3), gas holder liquid level low supplementary nitrogen gas valve (12) are installed on nitrogen gas pipeline (13), respiratory gas blow-down pipe (11) are connected with respiratory gas collection house steward (1), respiratory gas blow-down trip valve (10) are installed on respiratory gas blow-down pipe (11).
2. The gas-water separation respiratory gas collection system of claim 1, wherein the oil separator (25), oil sump (39), final oil separator (27), preliminary tar separator (34), pure tar sump (36), first buffer tank (42), second buffer tank (49), product gas water buffer tank (53), flushing tank (58), slurry tank (60), and tar sump (63) each comprise a tank body (14 '), a respiratory gas conduit (15 '), a respiratory valve (16 '), a top respiratory gas conduit (17 '), and a flame arrestor (19 '), wherein: the breather valve (16 ') is connected with the tank body (14') through a breather pipeline (15 '), the tank body (14') is connected with a breather collecting main pipe (1 ') through a top breather pipeline (17'), and a flame arrester (19 ') is arranged on the top breather pipeline (17').
3. The gas-water separation respiratory gas collection system according to claim 1, further comprising a respiratory gas return pipe (4), a return respiratory gas cooler (5) and a gas tank liquid level control respiratory gas return valve (6), wherein two ends of the respiratory gas return pipe (4) are respectively connected with the out-of-range respiratory gas delivery pipe (8) and the gas tank respiratory gas delivery pipe (2), and the return respiratory gas cooler (5) and the gas tank liquid level control respiratory gas return valve (6) are installed on the respiratory gas return pipe (4).
4. A gas-water separation breathing gas collection method using the gas-water separation breathing gas collection system of any one of claims 1 to 3, comprising the steps of:
s1, feeding the oil-containing gas water from the gas water pipeline (22) of the low-temperature methanol washing device and the oil-containing gas water from the oil-containing gas pipeline (23) of the gas cooling device into an oil-containing gas water expansion tank (24), and reducing the pressure in the oil-containing gas water expansion tank (24) to 0-20 kPa;
s2, the decompressed gas water in the oil-containing gas water expansion tank (24) flows into an oil separator (25), the oil in the gas water floats to the upper layer and overflows to an oil groove (39) through an overflow weir in the oil separator (25), the oil recovered in the oil groove (39) is sent to a tank area through an oil pump (41), and the gas water treated by the oil separator (25) is sent to a final oil separator (27);
s3, enabling dust-containing gas water sent from a tar-containing gas water pipeline (29) of a gas cooling device and tar-containing gas water sent from a dust-containing gas water pipeline (30) of a gasification device to enter a gas water heat exchanger (31), exchanging heat with high-pressure injection gas water sent to a pressurization gasification and conversion device in the gas water heat exchanger (31), enabling the gas water after heat exchange to enter a dust-containing gas water cooler (32), enabling the dust-containing gas water cooled by the dust-containing gas water cooler (32) to be mixed with low-pressure dust-containing gas water from the gasification device, enabling the mixture to enter a dust-containing gas water expansion tank (33), and expanding the mixture to 0-20 kPa in the dust-containing gas water expansion tank (33);
s4, the dust-containing gas water from the dust-containing gas water expansion tank (33) flows into the primary tar separator (34) and is separated in the primary tar separator (34), dust and tar in the dust-containing gas water are settled in a cone-shaped body part at the lower part of the primary tar separator (34), and the tar is separated from the middle lower part of the primary tar separator (34) and flows to the pure tar tank (36) and is sent to a tank area through the pure tar pump (38);
s5, allowing part of the gas water from the initial tar separator (34) and the gas water from the oil separator (25) to flow into the final oil separator (27) by gravity and the other part of the gas water to flow into the first buffer tank (42), or allowing the gas water from the initial tar separator (34) and the gas water from the oil separator (25) to flow into the first buffer tank (42) by gravity, then sending the gas water into the primary gas water cooler (47) and the secondary gas water cooler (48) by the gas water delivery pump (44), allowing the gas water to enter the final oil separator (27) after being cooled by the primary gas water cooler (47) and the secondary gas water cooler (48), and allowing the gas water in the final oil separator (27) to flow into the second buffer tank (49) by gravity; one part of gas water in the first buffer tank (42) is pressurized by a gas water injection pump (46) and then sent to a conversion cooling device, and the other part of gas water is pressurized by a gas water injection pump (45), preheated by a gas water heat exchanger (31) and then sent to a pressurization gasification and conversion cooling device;
s6, conveying the gas water in the second buffer tank (49) into a double-medium filter (52) through a gas water conveying pump (51) for filtering, conveying the filtered gas water into a product gas water buffer tank (53), and conveying the filtered gas water into a phenol ammonia recovery device through a product gas water pump (55) and a product gas water pipeline (56);
s7, pumping a coal gas flow from a product coal gas water pipeline (56) by a product coal gas water pump (55), sending the coal gas flow to a flushing coal gas water heater (57), heating the coal gas flow by the flushing coal gas water heater (57), then sending the coal gas flow into a flushing tank (58), pressurizing the coal gas flow by a filter flushing pump (59), then sending the coal gas flow into a double-medium filter (52) to flush the double-medium filter (52), sending the flushed slurry to a slurry tank (60), and pressurizing the slurry by a slurry pump (62), and then sending the slurry to a primary tar separator (34);
s8, feeding tar sewage discharged from an oil-containing gas water expansion tank (24), an oil separator (25), a final oil separator (27), a dust-containing gas water expansion tank (33), a pure tar tank (36), an oil tank (39), a first buffer tank (42), a second buffer tank (49), a product gas water buffer tank (53), a flushing tank (58) and a slurry liquid tank (60) into a tar sewage tank (63), and feeding the tar sewage into a primary tar separator (34) through a tar sewage pump (65);
s9, collecting respiratory air collected by an oil separator (25), an oil groove (39), a final oil separator (27), a primary tar separator (34), a pure tar oil groove (36), a first buffer groove (42), a second buffer groove (49), a product gas water buffer groove (53), a slurry liquid groove (60) and a tar sewage groove (63) into a respiratory air collecting main pipe (1), collecting the respiratory air into a respiratory air cabinet (3) through a respiratory air conveying pipe (2) of the respiratory air cabinet, and conveying the respiratory air out of a boundary area through a respiratory air conveying pipe (8) of an out-of-boundary area after being pressurized by a respiratory air frequency conversion fan (7) controlled by the air cabinet liquid level.
5. The gas water separation method of claim 4, wherein the gas water separation breathing gas collection method further comprises:
the liquid level control breathing gas reflux valve (6) of the gas holder is opened, the respirator returns to the breathing gas holder (3) through the breathing gas reflux pipe (4), and the temperature of the breathing gas returning to the breathing gas holder (3) is cooled through the reflux breathing gas cooler (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010461377.2A CN111518598A (en) | 2020-05-27 | 2020-05-27 | Gas-water separation respiratory gas collection system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010461377.2A CN111518598A (en) | 2020-05-27 | 2020-05-27 | Gas-water separation respiratory gas collection system and method |
Publications (1)
| Publication Number | Publication Date |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2541354C1 (en) * | 2013-10-02 | 2015-02-10 | Федеральное государственное унитарное предприятие "Центральный институт авиационного моторостроения имени П.И. Баранова" | Plant for gas production out of gas hydrate |
| CN205653290U (en) * | 2016-04-15 | 2016-10-19 | 内蒙古大唐国际克什克腾煤制天然气有限责任公司 | A device for separating broken coal pressure gasification producer gas water |
| CN110628477A (en) * | 2019-09-20 | 2019-12-31 | 成都聚实节能科技有限公司 | Method for co-production of fuel oil and aromatic hydrocarbon by using pressurized moving bed and multi-layer hydrogenation of coal to prepare natural gas |
| CN212610471U (en) * | 2020-05-27 | 2021-02-26 | 赛鼎工程有限公司 | Gas-water separation respiratory gas collecting system |
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- 2020-05-27 CN CN202010461377.2A patent/CN111518598A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2541354C1 (en) * | 2013-10-02 | 2015-02-10 | Федеральное государственное унитарное предприятие "Центральный институт авиационного моторостроения имени П.И. Баранова" | Plant for gas production out of gas hydrate |
| CN205653290U (en) * | 2016-04-15 | 2016-10-19 | 内蒙古大唐国际克什克腾煤制天然气有限责任公司 | A device for separating broken coal pressure gasification producer gas water |
| CN110628477A (en) * | 2019-09-20 | 2019-12-31 | 成都聚实节能科技有限公司 | Method for co-production of fuel oil and aromatic hydrocarbon by using pressurized moving bed and multi-layer hydrogenation of coal to prepare natural gas |
| CN212610471U (en) * | 2020-05-27 | 2021-02-26 | 赛鼎工程有限公司 | Gas-water separation respiratory gas collecting system |
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