CN106115736B - Decarbonization and desulfurization method for crude ammonia gas stripped by coal chemical conversion condensate - Google Patents
Decarbonization and desulfurization method for crude ammonia gas stripped by coal chemical conversion condensate Download PDFInfo
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- CN106115736B CN106115736B CN201610496128.0A CN201610496128A CN106115736B CN 106115736 B CN106115736 B CN 106115736B CN 201610496128 A CN201610496128 A CN 201610496128A CN 106115736 B CN106115736 B CN 106115736B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/12—Separation of ammonia from gases and vapours
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Abstract
The invention relates to a decarbonization and desulfurization method for stripping crude ammonia gas from conversion condensate in coal chemical industry, which comprises the steps of removing most of carbon dioxide and part of hydrogen sulfide in the crude ammonia gas by adopting a method of absorbing and washing concentrated ammonia water at low temperature, and deeply removing the hydrogen sulfide by adopting a method of absorbing and washing by using a desulfurizing agent, so that the produced ammonia water and liquid ammonia reach the national sales standard; thus, the crude ammonia gas is changed into refined ammonia gas which meets the national liquid ammonia standard, and the ammonia water prepared by the refined ammonia gas can also reach the national sales standard. The existing finished product ammonia water and liquid ammonia refrigerating systems of enterprises are fully utilized, and the circulation rate of liquid ammonia is reduced; the treatment cost is reduced; the system can be used for simultaneously producing two products of ammonia water and liquid ammonia, and the yield ratio of the ammonia water and the liquid ammonia can be flexibly adjusted according to the change of market conditions, so that the economic benefit of enterprises is furthest improved; the quality of ammonia water and liquid ammonia is improved, the investment of the project can be recovered about one year, and the environmental protection can be comprehensively up to the standard.
Description
Technical field
The invention belongs to the waste gas of the chemical fields such as coal chemical industry, new energy chemical industry, petrochemical industry, wastewater treatment link, tool
Body is related in coal chemical industry conversion condensate liquid stripping purification process, is cooled down from the steam containing ammonia of stripper lateral line withdrawal function through multistage fractional condensation
After purification, formation containing a small amount of carbon dioxide, the decarburization of the thick ammonia (referred to as stripping thick ammonia) of hydrogen sulfide, sulfur method.
Background technology
The emerging energies such as coal chemical industry, methanol, ether, dimethyl ether and chemical enterprise coal gasification and the gas that gasifies cooling and wash
During washing, due to temperature decline, pressure is higher, have a large amount of ammonias, carbon dioxide and a small amount of hydrogen sulfide, carbon monoxide,
Hydrogen etc. is condensed and is dissolved into condensate liquid, is formed rich in ammonia, the conversion gas condensate liquid of carbon dioxide.The conversion condensate liquid category
High ammonia-nitrogen wastewater, directly outer it can not arrange, after enterprise takes my patented technology (patent No. ZL201410715531.9) to handle,
In the qualifying liquid that stripper purifies, ammonia nitrogen concentration only has 10-50mg/L, gas concentration lwevel 5-40mg/L, and hydrogen sulfide is dense
0.01-2mg/L is spent, directly returns gasification system reuse；In the sour gas that stripper top row comes out, actual ammonia level is less than
1%th, less than 4%, carbon monoxide, less than 3%, hydrogen, less than 3%, moisture, less than 3%, (five are quality hundred to hydrogen sulfide above
Divide ratio), remaining is carbon dioxide, and enterprise introduces after sulfur recovery system further reclaims sulphur and discharged, and Ye You enterprises are introduced directly into fire
Discharged after the burning of torch system；The steam containing ammoniacal liquor of stripper lateral line withdrawal function through multistage fractional condensation purify, turn into containing a small amount of carbon dioxide,
The thick ammonia of moisture and hydrogen sulfide, wherein carbon dioxide mass concentration 1-3.5%, biodiversity concentration 0.5-3%, hydrogen sulfide matter
Concentration 0.02-0.1% is measured, the thick ammonia has produced mass concentration 15%-30% ammonia after high-order ammonia absorber cyclic absorption
Water, enterprise are directly used in denitration of boiler smoke and desulphurization system, so that conversion condensate liquid obtains recovery completely and comprehensive utilization.
Due to the ammoniacal liquor whole digestibility and utilization for failing to produce in Some Enterprises denitration, sweetening process, remainder must be to city
Field sale, this ammoniacal liquor for requiring to produce is in addition to enterprise's denitration of boiler smoke, desulfurization requirement is reached, it is necessary to reaches
National standard sells standard.And if the ammoniacal liquor produced originally directly purified in liquid phase, national standard is extremely difficult to, therefore need
Will be to thick ammonia (being into the thick ammonia before high-order ammonia absorber, that is, strip thick ammonia) further decarburization, the desulfurization before production ammoniacal liquor.
Therefore, trying to explore new processing method and processing unit, on the premise of national environmental standard is met, thick ammonia is carried out deep
Degree purification, produce and meet national standard and available for the high-purity ammonia water of market sale, realize the target of comprehensive utilization of resources, turn into
The important and eager task of above-mentioned enterprise and scientific research institution.
Therefore, the emerging energy such as coal chemical industry enterprises and methanol, alkene, dimethyl ether enterprise, being badly in need of a kind of method will can convert
Condensate liquid strips thick ammonia deep purifying, realizes comprehensive utilization of resources；Rather moderate is invested simultaneously, and is realizing operation just as far as possible
Income.Only in this way, the long-term health development of Chemical Industry could be ensured.
The content of the invention
It is an object of the invention to provide a kind of coal chemical industry conversion condensate liquid to strip the decarburization of thick ammonia, sulfur method, makes net
The ammoniacal liquor and liquefied ammonia that the thick ammonia of stripping after change is produced are entirely capable of reaching enterprise's reuse requirement and national standard sale standard, and will removing
Carbon dioxide, hydrogen sulfide reclaim again, realize comprehensive utilization of resources, so as to turn waste into wealth, finally improve the quality of production, lifted
Social and economic benefit.
To achieve the above object, the scheme that uses of the present invention is：
A kind of coal chemical industry conversion condensate liquid strips the decarburization of thick ammonia, sulfur method, comprises the following steps：
A, condensate liquid stripper (10) lateral line withdrawal function and the thick ammonia of stripping after multistage segregator cooling and purifying are converted, its
Middle carbon dioxide mass concentration 1-3.5%, biodiversity concentration 0.5-3%, hydrogen sulfide mass concentration 0.02-0.1%, ammonia matter
Concentration 93.4-98.48% is measured, enters tower from thick ammonia one-level treating column (1) hypomere using absolute pressure 0.15-0.4Mpa overbottom pressure,
Flow from bottom to top；
B, the finished product ammoniacal liquor from finished product tank used for storing ammonia (2) concentration 15-50% presses thick ammonia by finished product ammoniacal liquor feed pump (3)
20-36 times of middle carbon dioxide content is quantitatively squeezed into before cleaning circulation pump (4) pump in circulation pipe (5)；It is simultaneously from enterprise's ice maker
The liquefied ammonia of refrigeration system introduces washing by 0-16 times of carbon dioxide content in thick ammonia by absolute pressure 0.25-1Mpa overbottom pressure and followed
Before ring pump (4) pump in circulation pipe (5)；After finished product ammoniacal liquor and liquefied ammonia mix in circulation pipe (5), scrubbed circulating pump (4) is squeezed into
Cooler (6) tube side, the liquefied ammonia from enterprise's ice maker refrigeration system absorb heat in cooler (6) shell side decompression evaporation, by ammoniacal liquor and
Liquefied ammonia mixed liquor is cooled to -15-0 DEG C, and mixed liquor exports overbottom pressure by cleaning circulation pump (4) and entered from one-level treating column (1) top,
Inner-tower filling material laminar flow is passed through, carries out washing absorption to the thick ammonia that flows from bottom to top, the dioxy in thick ammonia
Change carbon, hydrogen sulfide are absorbed by concentrated ammonia solution, and moisture is also further condensed out, and thick ammonia is purified；
C, after the mixed liquor absorbing carbon dioxide and hydrogen sulfide in one-level treating column (1), aminoquinoxaline and vulcanization are formed
Ammonium mixed solution (abbreviation desulphurization circulating liquid), scrubbed circulating pump (4) are got out of tower, the supplement finished product ammonia in circulation pipe (5)
Water and liquefied ammonia, and by cooler (6) cool after, one-level treating column (1) is reentered, to the carbon dioxide in thick ammonia, sulphur
Change hydrogen and carry out cyclic absorption；When the aminoquinoxaline in desulphurization circulating liquid reaches saturation, the finished product through supplement in circulation pipe (5)
Ammoniacal liquor and liquefied ammonia, fractional condensation liquid buffer tank (18) is squeezed into through circulation fluid reflux pump (7), after being mixed with the fractional condensation liquid of stripper (10),
Stripper degassing tank (9) is squeezed into through booster pump (8), and enters stripper (10) and strips again, the amino first in desulphurization circulating liquid
Sour ammonium, ammonium sulfide pyrolytic are ammonia, carbon dioxide, hydrogen sulfide, and wherein carbon dioxide, hydrogen sulfide is arranged from stripper top
Go out, sulfur recovery or flare system are entered together with the sour gas original with stripper, ammonia is then from stripper (10) lateral line withdrawal function, warp
One-level treating column (1) decarburization, desulfurization are reentered after multistage segregator cooling and purifying；
D, for thick ammonia after one-level treating column (1) circulates washing, purifying, carbon dioxide mass concentration therein is 30-
1000ppm, hydrogen sulfide mass concentration 50-200ppm, biodiversity concentration 50-3000ppm；Enter ammonia liquor separator by overbottom pressure
(11) after the carbon dioxide, hydrogen sulfide, ammonia that, further remove the moisture carried secretly in thick ammonia and its dissolving, enter by overbottom pressure
Two level treating column (12)；The ammoniacal liquor gravity flow of removing enters one-level treating column (1) bottom cycle pipe；
E, in two level treating column (12), thick ammonia flows through the packing layer equipped with desulfurizing agent, vulcanization therein from bottom to top
Hydrogen is desulfurized agent absorption, and it is then constant for 0.5-5ppm, moisture to be further removed to carbon dioxide mass concentration；Subsequently into
Ammonia filter (13), possible entrained solid particulate matter filtering and removing, ammonia mass concentration in two level treating column (12) are carried
99.6%-99.99% is raised to, carbon dioxide mass concentration drops to 0.003-0.1%, and hydrogen sulfide mass concentration drops to
0.00005-0.0005%, biodiversity concentration drop to 0.005-0.3%, and thick ammonia turns into refined ammonia；
F, finished product ammonia vol in circulation pipe (5) is squeezed into from the refined ammonia of filter (13) extraction, foundation above-mentioned steps B
The ammonia quality being calculated with liquefied ammonia amount, the ice maker refrigeration system of enterprise is introduced by overbottom pressure, liquid is compressed into through ammonia compressor
Ammonia, supplement the liquefied ammonia consumption of ice maker refrigeration system and the system；Remainder is by overbottom pressure under the high-order ammonia absorber (14) of enterprise
Portion's side line enters；Middle ammonia circulation liquid in middle ammonia water tank (15) squeezes into high-order ammonia absorber by middle ammonia circulation pump (16)
(14) top, spray from top to bottom, the refined ammonia flowed from bottom to top is absorbed, subsequently flow into cooler (17) pipe
Journey, recirculated cooling water or from the liquefied ammonia that enterprise's ice maker refrigeration system attracts from cooler (17) shell side enter, middle ammoniacal liquor is followed
Ring liquid is cooled to-15-35 DEG C, flows into middle ammonia water tank (15), and then middle ammonia circulation liquid squeezes into a high position again through pump (16)
Ammonia absorber (14), cyclic absorption is carried out to the refined ammonia flowed from bottom to top；Through cyclic absorption, when ammonia concn reaches 15-
When 50% (mass concentration, similarly hereinafter), finished product tank used for storing ammonia (2) is squeezed into by finished product ammoniacal liquor feed pump (19), it is dense to turn into 15-50%
The finished product ammoniacal liquor of degree；Desalted water or Low Temperature Steam condensed water introduce middle ammonia water tank by absolute pressure 0.4Mpa overbottom pressure simultaneously, mend
The water consumption of production finished product ammoniacal liquor is filled, its quality is to enter the 17.65-100% of ammonia quality in high-order ammonia absorber (14).
A kind of coal chemical industry conversion condensate liquid strips the decarburization of thick ammonia, sulfur method, comprises the steps of：
A, condensate liquid stripper (10) lateral line withdrawal function and the thick ammonia of stripping after multistage segregator cooling and purifying are converted, its
Middle carbon dioxide mass concentration 1-3.5%, biodiversity concentration 0.5-3%, hydrogen sulfide mass concentration 0.02-0.1%, ammonia matter
Concentration 93.4-98.48% is measured, using absolute pressure 0.15-0.4Mpa overbottom pressure, enters tower from thick ammonia one-level treating column (1) hypomere,
Flow from bottom to top；
B, the finished product concentrated ammonia liquor from finished product tank used for storing ammonia (2) concentration 45-60% presses thick ammonia by finished product ammoniacal liquor feed pump (3)
50-60 times of carbon dioxide content is quantitatively squeezed into before cleaning circulation pump (4) pump in circulation pipe (5), then by cleaning circulation pump in gas
(4) cooler (6) tube side is squeezed into, liquefied ammonia or dimethyl ether from enterprise's ice maker refrigeration system are depressured in cooler (6) shell side to be steamed
Hair heat absorption, finished product ammoniacal liquor is cooled to-15-- 5 DEG C, low temperature finished product ammonia scrubbing circulating pump (4) outlet overbottom pressure refines from one-level
Tower (1) top enters, and passes through inner-tower filling material laminar flow, and washing absorption is carried out to the thick ammonia flowed from bottom to top,
Carbon dioxide, hydrogen sulfide in thick ammonia are absorbed by concentrated ammonia liquor, and moisture is also further condensed out, and thick ammonia is purified；
C, after the circulation fluid absorbing carbon dioxide and hydrogen sulfide in one-level treating column (1), formed aminoquinoxaline, carbon ammonium and
Ammonium sulfide mixed solution (abbreviation desulphurization circulating liquid), scrubbed circulating pump (4) are got out of tower, in the circulation pipe (5) supplement into
Product ammoniacal liquor, and by cooler (6) cool after, reenter one-level treating column (1), to the carbon dioxide in thick ammonia, vulcanization
Hydrogen carries out cyclic absorption；When the aminoquinoxaline in desulphurization circulating liquid reaches saturation, fractional condensation is squeezed into through circulation fluid reflux pump (7)
Liquid buffer tank (18), after being mixed with the fractional condensation liquid of stripper (10), stripper degassing tank (9) is squeezed into through booster pump (8), and enter
Stripper (10) strips again, and aminoquinoxaline therein, ammonium sulfide pyrolytic are ammonia, carbon dioxide, hydrogen sulfide；Dioxy
Change the discharge at the top of stripper (10) of carbon, hydrogen sulfide, enter sulfur recovery or flare system together with the sour gas original with stripper,
Ammonia then from stripper (10) lateral line withdrawal function, one-level treating column (1) decarburization is reentered after multistage segregator cooling and purifying, is taken off
Sulphur；
D, for thick ammonia after one-level treating column (1) circulates washing, purifying, carbon dioxide mass concentration therein is 30-
1000ppm, hydrogen sulfide mass concentration 50-200ppm, biodiversity concentration 50-3000ppm；Enter ammoniacal liquor knockout by overbottom pressure
(11) after the carbon dioxide, hydrogen sulfide, ammonia that, further remove the moisture carried secretly in thick ammonia and its dissolving, enter by overbottom pressure
Two level treating column (12)；The ammoniacal liquor gravity flow of removing enters one-level treating column (1) bottom cycle pipe；
E, in two level treating column (12), thick ammonia flows through the packing layer equipped with desulfurizing agent, vulcanization therein from bottom to top
Hydrogen is desulfurized agent absorption, and it is then constant to be further removed to carbon dioxide mass concentration 0.5-5ppm, moisture；Subsequently into ammonia
Air filter (13), by possible entrained solid particulate matter filtering and removing in two level treating column (12), the lifting of ammonia mass concentration
To 99.6%-99.99%, carbon dioxide mass concentration drops to 0.003-0.1%, and hydrogen sulfide mass concentration drops to
0.00005-0.0005%, biodiversity concentration drop to 0.005-0.3%, and thick ammonia turns into refined ammonia；
F, the refined ammonia drawn from filter (13), enters by overbottom pressure from high-order ammonia absorber (14) bottom side line of enterprise
Enter；Middle ammonia circulation liquid in middle ammonia water tank (15) is squeezed on high-order ammonia absorber (14) by middle ammonia circulation pump (16)
Portion, spray from top to bottom, the refined ammonia flowed from bottom to top is absorbed, subsequently flow into cooler (17) tube side, come from
The liquefied ammonia or dimethyl ether of enterprise's ice maker refrigeration system are absorbed heat in cooler (17) shell side decompression evaporation, and middle ammonia circulation liquid is dropped
Temperature flows into middle ammonia water tank to-15-- 5 DEG C；Then ammonia circulation liquid squeezes into high-order ammonia absorber again through pump (16) among
(14) cyclic absorption, is carried out to the refined ammonia flowed from bottom to top；When ammonia concn reaches mass concentration 45-60%, lead to
Cross finished product ammoniacal liquor feed pump (18) and squeeze into finished product tank used for storing ammonia (2), turn into the finished product ammoniacal liquor of mass concentration 45-60% concentration；Together
When desalted water or Low Temperature Steam condensed water by absolute pressure 0.4Mpa overbottom pressure introduce among ammonia water tank, supplement production finished product ammoniacal liquor
Water consumption, its quality are to enter the 81.82-150% of ammonia quality in high-order ammonia absorber (14).
The main characteristic of the invention lies in that：First, the method for first taking concentrated ammonia liquor low temperature absorption to wash will be exhausted in thick ammonia
Most of carbon dioxide and a part of hydrogen sulfide stripping are fallen, then the method deep removal hydrogen sulfide for taking desulfurizing agent to adsorb, so as to
Thick ammonia is set to be changed into the refined ammonia for meeting national liquefied ammonia standard, the ammoniacal liquor produced with it can also reach national sale standard；Two
It is existing finished product ammoniacal liquor and liquefied ammonia (or dimethyl ether) refrigeration system for taking full advantage of enterprise itself, reduces liquefied ammonia in systems
Cycling rate, reduce processing cost；Third, two kinds of products of ammoniacal liquor and liquefied ammonia can be produced using the system, and can be according to market feelings
Condition changes, and the ammonia amount of enterprise's ice maker refrigeration system is returned to by adjustment, and the yield proportioning of ammoniacal liquor and liquefied ammonia is adjusted flexibly, so as to
Enterprise economic benefit to greatest extent；Four be due to ammoniacal liquor, liquid ammonia quality lifting, the market price double left and right, 1 year
Left and right is recoverable this item mesh investment, and realizes environmentally friendly overall up to standard；Fifth, the device can be used for the decarburization of similar thick ammonia, take off
Sulphuring treatment.
Brief description of the drawings
Fig. 1 is the experimental provision structural representation of the embodiment of the present invention one.
Fig. 2 is the experimental provision structural representation of the embodiment of the present invention two.
Embodiment
Embodiment one：
A kind of coal chemical industry conversion condensate liquid strips the decarburization of thick ammonia, sulfur method, comprises the following steps：
A, condensate liquid stripper (10) lateral line withdrawal function and the thick ammonia of stripping after multistage segregator cooling and purifying are converted, its
Middle carbon dioxide mass concentration 1-3.5%, biodiversity concentration 0.5-3%, hydrogen sulfide mass concentration 0.02-0.1%, ammonia matter
Concentration 93.4-98.48% is measured, enters tower from thick ammonia one-level treating column (1) hypomere using absolute pressure 0.15-0.4Mpa overbottom pressure,
Flow from bottom to top；
B, the finished product ammoniacal liquor from finished product tank used for storing ammonia (2) concentration 15-50% presses thick ammonia by finished product ammoniacal liquor feed pump (3)
20-36 times of middle carbon dioxide content is quantitatively squeezed into before cleaning circulation pump (4) pump in circulation pipe (5)；It is simultaneously from enterprise's ice maker
The liquefied ammonia of refrigeration system introduces washing by 0-16 times of carbon dioxide content in thick ammonia by absolute pressure 0.25-1Mpa overbottom pressure and followed
Before ring pump (4) pump in circulation pipe (5)；After finished product ammoniacal liquor and liquefied ammonia mix in circulation pipe (5), scrubbed circulating pump (4) is squeezed into
Cooler (6) tube side, the liquefied ammonia from enterprise's ice maker refrigeration system absorb heat in cooler (6) shell side decompression evaporation, by ammoniacal liquor and
Liquefied ammonia mixed liquor is cooled to -15-0 DEG C, and mixed liquor exports overbottom pressure by cleaning circulation pump (4) and entered from one-level treating column (1) top,
Inner-tower filling material laminar flow is passed through, carries out washing absorption to the thick ammonia that flows from bottom to top, the dioxy in thick ammonia
Change carbon, hydrogen sulfide are absorbed by concentrated ammonia solution, and moisture is also further condensed out, and thick ammonia is purified；
C, after the mixed liquor absorbing carbon dioxide and hydrogen sulfide in one-level treating column (1), aminoquinoxaline and vulcanization are formed
Ammonium mixed solution (abbreviation desulphurization circulating liquid), scrubbed circulating pump (4) are got out of tower, the supplement finished product ammonia in circulation pipe (5)
Water and liquefied ammonia, and by cooler (6) cool after, one-level treating column (1) is reentered, to the carbon dioxide in thick ammonia, sulphur
Change hydrogen and carry out cyclic absorption；When the aminoquinoxaline in desulphurization circulating liquid reaches saturation, the finished product through supplement in circulation pipe (5)
Ammoniacal liquor and liquefied ammonia, fractional condensation liquid buffer tank (18) is squeezed into through circulation fluid reflux pump (7), after being mixed with the fractional condensation liquid of stripper (10),
Stripper degassing tank (9) is squeezed into through booster pump (8), and enters stripper (10) and strips again, the amino first in desulphurization circulating liquid
Sour ammonium, ammonium sulfide pyrolytic are ammonia, carbon dioxide, hydrogen sulfide, and wherein carbon dioxide, hydrogen sulfide is arranged from stripper top
Go out, sulfur recovery or flare system are entered together with the sour gas original with stripper, ammonia is then from stripper (10) lateral line withdrawal function, warp
One-level treating column (1) decarburization, desulfurization are reentered after multistage segregator cooling and purifying；
D, for thick ammonia after one-level treating column (1) circulates washing, purifying, carbon dioxide mass concentration therein is 30-
1000ppm, hydrogen sulfide mass concentration 50-200ppm, biodiversity concentration 50-3000ppm；Enter ammonia liquor separator by overbottom pressure
(11) after the carbon dioxide, hydrogen sulfide, ammonia that, further remove the moisture carried secretly in thick ammonia and its dissolving, enter by overbottom pressure
Two level treating column (12)；The ammoniacal liquor gravity flow of removing enters one-level treating column (1) bottom cycle pipe；
E, in two level treating column (12), thick ammonia flows through the packing layer equipped with desulfurizing agent, vulcanization therein from bottom to top
Hydrogen is desulfurized agent absorption, and it is then constant for 0.5-5ppm, moisture to be further removed to carbon dioxide mass concentration；Subsequently into
Ammonia filter (13), possible entrained solid particulate matter filtering and removing, ammonia mass concentration in two level treating column (12) are carried
99.6%-99.99% is raised to, carbon dioxide mass concentration drops to 0.003-0.1%, and hydrogen sulfide mass concentration drops to
0.00005-0.0005%, biodiversity concentration drop to 0.005-0.3%, and thick ammonia turns into refined ammonia；
F, finished product ammonia vol in circulation pipe (5) is squeezed into from the refined ammonia of filter (13) extraction, foundation above-mentioned steps B
The ammonia quality being calculated with liquefied ammonia amount, the ice maker refrigeration system of enterprise is introduced by overbottom pressure, liquid is compressed into through ammonia compressor
Ammonia, supplement the liquefied ammonia consumption of ice maker refrigeration system and the system；Remainder is by overbottom pressure under the high-order ammonia absorber (14) of enterprise
Portion's side line enters；Middle ammonia circulation liquid in middle ammonia water tank (15) squeezes into high-order ammonia absorber by middle ammonia circulation pump (16)
(14) top, spray from top to bottom, the refined ammonia flowed from bottom to top is absorbed, subsequently flow into cooler (17) pipe
Journey, recirculated cooling water or from the liquefied ammonia that enterprise's ice maker refrigeration system attracts from cooler (17) shell side enter, middle ammoniacal liquor is followed
Ring liquid is cooled to-15-35 DEG C, flows into middle ammonia water tank (15), and then middle ammonia circulation liquid squeezes into a high position again through pump (16)
Ammonia absorber (14), cyclic absorption is carried out to the refined ammonia flowed from bottom to top；Through cyclic absorption, when ammonia concn reaches 15-
When 50% (mass concentration, similarly hereinafter), finished product tank used for storing ammonia (2) is squeezed into by finished product ammoniacal liquor feed pump (19), it is dense to turn into 15-50%
The finished product ammoniacal liquor of degree；Desalted water or Low Temperature Steam condensed water introduce middle ammonia water tank by absolute pressure 0.4Mpa overbottom pressure simultaneously, mend
The water consumption of production finished product ammoniacal liquor is filled, its quality is to enter the 17.65-100% of ammonia quality in high-order ammonia absorber (14).
Embodiment two：
A kind of coal chemical industry conversion condensate liquid strips the decarburization of thick ammonia, sulfur method, comprises the steps of：
A, condensate liquid stripper (10) lateral line withdrawal function and the thick ammonia of stripping after multistage segregator cooling and purifying are converted, its
Middle carbon dioxide mass concentration 1-3.5%, biodiversity concentration 0.5-3%, hydrogen sulfide mass concentration 0.02-0.1%, ammonia matter
Concentration 93.4-98.48% is measured, using absolute pressure 0.15-0.4Mpa overbottom pressure, enters tower from thick ammonia one-level treating column (1) hypomere,
Flow from bottom to top；
B, the finished product concentrated ammonia liquor from finished product tank used for storing ammonia (2) concentration 45-60% presses thick ammonia by finished product ammoniacal liquor feed pump (3)
50-60 times of carbon dioxide content is quantitatively squeezed into before cleaning circulation pump (4) pump in circulation pipe (5), then by cleaning circulation pump in gas
(4) cooler (6) tube side is squeezed into, liquefied ammonia or dimethyl ether from enterprise's ice maker refrigeration system are depressured in cooler (6) shell side to be steamed
Hair heat absorption, finished product ammoniacal liquor is cooled to-15-- 5 DEG C, low temperature finished product ammonia scrubbing circulating pump (4) outlet overbottom pressure refines from one-level
Tower (1) top enters, and passes through inner-tower filling material laminar flow, and washing absorption is carried out to the thick ammonia flowed from bottom to top,
Carbon dioxide, hydrogen sulfide in thick ammonia are absorbed by concentrated ammonia liquor, and moisture is also further condensed out, and thick ammonia is purified；
C, after the circulation fluid absorbing carbon dioxide and hydrogen sulfide in one-level treating column (1), formed aminoquinoxaline, carbon ammonium and
Ammonium sulfide mixed solution (abbreviation desulphurization circulating liquid), scrubbed circulating pump (4) are got out of tower, in the circulation pipe (5) supplement into
Product ammoniacal liquor, and by cooler (6) cool after, reenter one-level treating column (1), to the carbon dioxide in thick ammonia, vulcanization
Hydrogen carries out cyclic absorption；When the aminoquinoxaline in desulphurization circulating liquid reaches saturation, fractional condensation is squeezed into through circulation fluid reflux pump (7)
Liquid buffer tank (18), after being mixed with the fractional condensation liquid of stripper (10), stripper degassing tank (9) is squeezed into through booster pump (8), and enter
Stripper (10) strips again, and aminoquinoxaline therein, ammonium sulfide pyrolytic are ammonia, carbon dioxide, hydrogen sulfide；Dioxy
Change the discharge at the top of stripper (10) of carbon, hydrogen sulfide, enter sulfur recovery or flare system together with the sour gas original with stripper,
Ammonia then from stripper (10) lateral line withdrawal function, one-level treating column (1) decarburization is reentered after multistage segregator cooling and purifying, is taken off
Sulphur；
D, for thick ammonia after one-level treating column (1) circulates washing, purifying, carbon dioxide mass concentration therein is 30-
1000ppm, hydrogen sulfide mass concentration 50-200ppm, biodiversity concentration 50-3000ppm；Enter ammoniacal liquor knockout by overbottom pressure
(11) after the carbon dioxide, hydrogen sulfide, ammonia that, further remove the moisture carried secretly in thick ammonia and its dissolving, enter by overbottom pressure
Two level treating column (12)；The ammoniacal liquor gravity flow of removing enters one-level treating column (1) bottom cycle pipe；
E, in two level treating column (12), thick ammonia flows through the packing layer equipped with desulfurizing agent, vulcanization therein from bottom to top
Hydrogen is desulfurized agent absorption, and it is then constant to be further removed to carbon dioxide mass concentration 0.5-5ppm, moisture；Subsequently into ammonia
Air filter (13), by possible entrained solid particulate matter filtering and removing in two level treating column (12), the lifting of ammonia mass concentration
To 99.6%-99.99%, carbon dioxide mass concentration drops to 0.003-0.1%, and hydrogen sulfide mass concentration drops to
0.00005-0.0005%, biodiversity concentration drop to 0.005-0.3%, and thick ammonia turns into refined ammonia；
F, the refined ammonia drawn from filter (13), enters by overbottom pressure from high-order ammonia absorber (14) bottom side line of enterprise
Enter；Middle ammonia circulation liquid in middle ammonia water tank (15) is squeezed on high-order ammonia absorber (14) by middle ammonia circulation pump (16)
Portion, spray from top to bottom, the refined ammonia flowed from bottom to top is absorbed, subsequently flow into cooler (17) tube side, come from
The liquefied ammonia or dimethyl ether of enterprise's ice maker refrigeration system are absorbed heat in cooler (17) shell side decompression evaporation, and middle ammonia circulation liquid is dropped
Temperature flows into middle ammonia water tank to-15-- 5 DEG C；Then ammonia circulation liquid squeezes into high-order ammonia absorber again through pump (16) among
(14) cyclic absorption, is carried out to the refined ammonia flowed from bottom to top；When ammonia concn reaches mass concentration 45-60%, lead to
Cross finished product ammoniacal liquor feed pump (18) and squeeze into finished product tank used for storing ammonia (2), turn into the finished product ammoniacal liquor of mass concentration 45-60% concentration；Together
When desalted water or Low Temperature Steam condensed water by absolute pressure 0.4Mpa overbottom pressure introduce among ammonia water tank, supplement production finished product ammoniacal liquor
Water consumption, its quality are to enter the 81.82-150% of ammonia quality in high-order ammonia absorber (14).
By above step A-F, thick ammonia obtains deep purifying, the ammoniacal liquor mass concentration 15-50% of production, liquid ammonia quality
Concentration 99.6-99.99%, reach national national standard sale standard, ammonia recovery more than 95%.
Capital equipment of the present invention includes：
1st, thick ammonia one-level refining system：By one-level treating column 1, ammonia liquor separator 11, circulating pump 4,16, it is reflux pump 7, cold
But device 6, pneumatic control valve etc. form；
2nd, thick ammonia two level refining system：It is made up of two level treating column 12, ammonia filter 13 etc.
3rd, phegma stripping system is refined：Using the original stripper 10 of enterprise, degassing tank 9, three-level fractional condensation system, etc. set
It is standby；
4th, ammoniacal liquor preparation system：Utilize the equipment such as the original high-order ammonia absorber of enterprise, ammonia water tank；
5th, liquefied ammonia preparation system：Utilize the equipment such as the original ammonia compressor of enterprise, multistage segregator；
6th, electric, blind controller system：It is made up of electrical system, DCS control systems and control valve, control instrument etc.,
And it can be achieved a butt joint with the control of former conversion condensate liquid stripping system.
In apparatus of the present invention, cold, and output liquefied ammonia are provided using the ice maker refrigeration system of enterprise itself；Using original
High-order ammonia absorber produces high-purity finished product ammoniacal liquor；Carbon dioxide, the hydrogen sulfide of removing finally realize qualified discharge；Liquefied ammonia cycling rate
Less than 15%；System is in itself without feed enrichment problem.
Claims (2)
1. a kind of coal chemical industry conversion condensate liquid strips the decarburization of thick ammonia, sulfur method, it is characterised in that：Comprise the following steps：
A, condensate liquid stripper (10) lateral line withdrawal function and the thick ammonia of stripping after multistage segregator cooling and purifying are converted, wherein two
Carbonoxide mass concentration 1-3.5%, biodiversity concentration 0.5-3%, hydrogen sulfide mass concentration 0.02-0.1%, ammonia quality are dense
93.4-98.48% is spent, enters tower from thick ammonia one-level treating column (1) hypomere using absolute pressure 0.15-0.4MPa overbottom pressure, under
And upper flowing；
B, the finished product ammoniacal liquor from finished product tank used for storing ammonia (2) mass concentration 15-50% presses thick ammonia by finished product ammoniacal liquor feed pump (3)
20-36 times of middle carbon dioxide content is quantitatively squeezed into before cleaning circulation pump (4) pump in circulation pipe (5)；It is simultaneously from enterprise's ice maker
The liquefied ammonia of refrigeration system introduces washing by absolute pressure 0.25-1MPa overbottom pressure by 0-16 times of carbon dioxide content in thick ammonia
Before circulating pump (4) pump in circulation pipe (5)；After finished product ammoniacal liquor and liquefied ammonia mix in circulation pipe (5), scrubbed circulating pump (4) is beaten
Enter cooler (6) tube side, the liquefied ammonia from enterprise's ice maker refrigeration system absorbs heat in cooler (6) shell side decompression evaporation, by ammoniacal liquor
- 15-0 DEG C are cooled to liquefied ammonia mixed liquor, mixed liquor enters by cleaning circulation pump (4) outlet overbottom pressure from one-level treating column (1) top
Enter, pass through inner-tower filling material laminar flow, carry out washing absorption to the thick ammonia that flows from bottom to top, two in thick ammonia
Carbonoxide, hydrogen sulfide are absorbed by concentrated ammonia solution, and moisture also further condenses out, and thick ammonia is purified；
C, after the mixed liquor absorbing carbon dioxide and hydrogen sulfide in one-level treating column (1), form aminoquinoxaline and ammonium sulfide mixes
Solution is closed, scrubbed circulating pump (4) is got out of tower, supplement finished product ammoniacal liquor and liquefied ammonia in circulation pipe (5), and passes through cooler
(6) after cooling, one-level treating column (1) is reentered, cyclic absorption is carried out to the carbon dioxide in thick ammonia, hydrogen sulfide；Work as ammonia
When aminoquinoxaline in base ammonium formate and ammonium sulfide mixed solution reaches saturation, the finished product ammoniacal liquor through supplement in circulation pipe (5)
And liquefied ammonia, fractional condensation liquid buffer tank (18) is squeezed into through circulation fluid reflux pump (7), after being mixed with the fractional condensation liquid of stripper (10), through increasing
Press pump (8) squeezes into stripper degassing tank (9), and enters stripper (10) and strip again, and aminoquinoxaline and ammonium sulfide mixing are molten
Aminoquinoxaline, ammonium sulfide pyrolytic in liquid are ammonia, carbon dioxide, hydrogen sulfide, and wherein carbon dioxide, hydrogen sulfide are from vapour
Stripper overhead is discharged, and enters sulfur recovery or flare system together with the sour gas original with stripper, ammonia is then from stripper (10)
Lateral line withdrawal function, one-level treating column (1) decarburization, desulfurization are reentered after multistage segregator cooling and purifying；
D, for thick ammonia after one-level treating column (1) circulates washing, purifying, carbon dioxide mass concentration therein is 30-1000ppm,
Hydrogen sulfide mass concentration 50-200ppm, biodiversity concentration 50-3000ppm；Enter ammonia liquor separator (11) by overbottom pressure, enter one
After step removes the carbon dioxide, hydrogen sulfide, ammonia of the moisture carried secretly in thick ammonia and its dissolving, enter two level treating column by overbottom pressure
(12)；The ammoniacal liquor gravity flow of removing enters one-level treating column (1) bottom cycle pipe；
E, in two level treating column (12), thick ammonia flows through the packing layer equipped with desulfurizing agent, hydrogen sulfide quilt therein from bottom to top
Desulfurizing agent adsorbs, and it is then constant for 0.5-5ppm, moisture to be further removed to carbon dioxide mass concentration；Subsequently into ammonia
Filter (13), by possible entrained solid particulate matter filtering and removing in two level treating column (12), the lifting of ammonia mass concentration is arrived
99.6%-99.99%, carbon dioxide mass concentration drop to 0.003-0.1%, and hydrogen sulfide mass concentration drops to 0.00005-
0.0005%, biodiversity concentration drops to 0.005-0.3%, and thick ammonia turns into refined ammonia；
F, finished product ammonia vol and liquid in circulation pipe (5) are squeezed into from the refined ammonia of filter (13) extraction, foundation above-mentioned steps B
The ammonia quality that ammonia amount is calculated, the ice maker refrigeration system of enterprise is introduced by overbottom pressure, liquefied ammonia is compressed into through ammonia compressor, mended
Fill the liquefied ammonia consumption of ice maker refrigeration system and the system；Remainder leans on high-order ammonia absorber (14) bottom side line of the overbottom pressure from enterprise
Into；Middle ammonia circulation liquid in middle ammonia water tank (15) is squeezed on high-order ammonia absorber (14) by middle ammonia circulation pump (16)
Portion, spray from top to bottom, the refined ammonia flowed from bottom to top is absorbed, subsequently flow into cooler (17) tube side, circulate
Cooling water enters from the liquefied ammonia that enterprise's ice maker refrigeration system attracts from cooler (17) shell side, and middle ammonia circulation liquid is cooled
To-15-35 DEG C, middle ammonia water tank (15) is flowed into, then middle ammonia circulation liquid squeezes into high-order ammonia absorber again through pump (16)
(14) cyclic absorption, is carried out to the refined ammonia flowed from bottom to top；Through cyclic absorption, when ammoniacal liquor mass concentration reaches 15-
When 50%, finished product tank used for storing ammonia (2) is squeezed into by finished product ammoniacal liquor feed pump (19), turns into the finished product ammonia of 15-50% mass concentrations
Water；Desalted water or Low Temperature Steam condensed water introduce middle ammonia water tank, supplement production finished product by absolute pressure 0.4MPa overbottom pressure simultaneously
The water consumption of ammoniacal liquor, its quality are to enter the 17.65-100% of ammonia quality in high-order ammonia absorber (14).
2. a kind of coal chemical industry conversion condensate liquid strips the decarburization of thick ammonia, sulfur method, it is characterised in that：Comprise the steps of：
A, condensate liquid stripper (10) lateral line withdrawal function and the thick ammonia of stripping after multistage segregator cooling and purifying are converted, wherein two
Carbonoxide mass concentration 1-3.5%, biodiversity concentration 0.5-3%, hydrogen sulfide mass concentration 0.02-0.1%, ammonia quality are dense
93.4-98.48% is spent, using absolute pressure 0.15-0.4MPa overbottom pressure, enters tower from thick ammonia one-level treating column (1) hypomere, from
Lower and upper flowing；
B, the finished product concentrated ammonia liquor from finished product tank used for storing ammonia (2) mass concentration 45-60% presses thick ammonia by finished product ammoniacal liquor feed pump (3)
50-60 times of carbon dioxide content is quantitatively squeezed into before cleaning circulation pump (4) pump in circulation pipe (5), then by cleaning circulation pump in gas
(4) cooler (6) tube side is squeezed into, liquefied ammonia or dimethyl ether from enterprise's ice maker refrigeration system are depressured in cooler (6) shell side to be steamed
Hair heat absorption, finished product ammoniacal liquor is cooled to-15-- 5 DEG C, low temperature finished product ammonia scrubbing circulating pump (4) outlet overbottom pressure refines from one-level
Tower (1) top enters, and passes through inner-tower filling material laminar flow, and washing absorption is carried out to the thick ammonia flowed from bottom to top,
Carbon dioxide, hydrogen sulfide in thick ammonia are absorbed by concentrated ammonia liquor, and moisture is also further condensed out, and thick ammonia is purified；
C, after the circulation fluid absorbing carbon dioxide and hydrogen sulfide in one-level treating column (1), aminoquinoxaline, carbon ammonium and vulcanization are formed
Ammonium mixed solution, scrubbed circulating pump (4) are got out of tower, the supplement finished product ammoniacal liquor in circulation pipe (5), and pass through cooler
(6) after cooling, one-level treating column (1) is reentered, cyclic absorption is carried out to the carbon dioxide in thick ammonia, hydrogen sulfide；Work as ammonia
When aminoquinoxaline in base ammonium formate, carbon ammonium and ammonium sulfide mixed solution reaches saturation, squeezed into point through circulation fluid reflux pump (7)
Lime set buffer tank (18), after being mixed with the fractional condensation liquid of stripper (10), stripper degassing tank (9) is squeezed into through booster pump (8), is gone forward side by side
Enter stripper (10) to strip again, aminoquinoxaline therein, ammonium sulfide pyrolytic are ammonia, carbon dioxide, hydrogen sulfide；Two
Carbonoxide, hydrogen sulfide are discharged at the top of stripper (10), enter sulfur recovery or torch system together with the sour gas original with stripper
From stripper (10) lateral line withdrawal function, it is de- then to reenter one-level treating column (1) after multistage segregator cooling and purifying for system, ammonia
Carbon, desulfurization；
D, for thick ammonia after one-level treating column (1) circulates washing, purifying, carbon dioxide mass concentration therein is 30-1000ppm,
Hydrogen sulfide mass concentration 50-200ppm, biodiversity concentration 50-3000ppm；Enter ammonia liquor separator (11) by overbottom pressure, enter one
After step removes the carbon dioxide, hydrogen sulfide, ammonia of the moisture carried secretly in thick ammonia and its dissolving, enter two level treating column by overbottom pressure
(12)；The ammoniacal liquor gravity flow of removing enters one-level treating column (1) bottom cycle pipe；
E, in two level treating column (12), thick ammonia flows through the packing layer equipped with desulfurizing agent, hydrogen sulfide quilt therein from bottom to top
Desulfurizing agent adsorbs, and it is then constant to be further removed to carbon dioxide mass concentration 0.5-5ppm, moisture；Subsequently into ammonia mistake
Filter (13), by possible entrained solid particulate matter filtering and removing in two level treating column (12), the lifting of ammonia mass concentration is arrived
99.6%-99.99%, carbon dioxide mass concentration drop to 0.003-0.1%, and hydrogen sulfide mass concentration drops to 0.00005-
0.0005%, biodiversity concentration drops to 0.005-0.3%, and thick ammonia turns into refined ammonia；
F, the refined ammonia drawn from filter (13), enter by overbottom pressure from high-order ammonia absorber (14) bottom side line of enterprise；In
Between middle ammonia circulation liquid in ammonia water tank (15) high-order ammonia absorber (14) top is squeezed into by middle ammonia circulation pump (16), from upper
And lower spray, the refined ammonia flowed from bottom to top is absorbed, subsequently flows into cooler (17) tube side, from enterprise's ice maker
The liquefied ammonia or dimethyl ether of refrigeration system absorb heat in cooler (17) shell side decompression evaporation, middle ammonia circulation liquid is cooled to-
15-- 5 DEG C, flow into middle ammonia water tank；Then ammonia circulation liquid squeezes into high-order ammonia absorber (14) again through pump (16) among, to certainly
The refined ammonia of lower and upper flowing carries out cyclic absorption；When ammonia concn reaches mass concentration 45-60%, pass through finished product ammoniacal liquor
Feed pump (19) squeezes into finished product tank used for storing ammonia (2), turns into the finished product ammoniacal liquor of mass concentration 45-60% concentration；Simultaneously desalted water or
Low Temperature Steam condensed water introduces middle ammonia water tank by absolute pressure 0.4MPa overbottom pressure, and supplement produces the water consumption of finished product ammoniacal liquor,
Its quality is to enter the 81.82-150% of ammonia quality in high-order ammonia absorber (14).
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| CN104445272A (en) * | 2014-11-28 | 2015-03-25 | 王文领 | Comprehensive recycling method of transformation gas condensation liquid containing ammonia gas and carbon dioxide |
| CN105645434A (en) * | 2015-12-29 | 2016-06-08 | 王文领 | Comprehensive utilization method of condensed diluted ammonia water containing ammonia gas, carbon dioxide and hydrogen sulfide |
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| CN104445272A (en) * | 2014-11-28 | 2015-03-25 | 王文领 | Comprehensive recycling method of transformation gas condensation liquid containing ammonia gas and carbon dioxide |
| CN105645434A (en) * | 2015-12-29 | 2016-06-08 | 王文领 | Comprehensive utilization method of condensed diluted ammonia water containing ammonia gas, carbon dioxide and hydrogen sulfide |
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